Cranes have changed a lot in the past few decades. Although some operators still adhere to the original operation mode on lifting equipment that has been used for many years, some people have taken a step ahead and learned to use the advantages of the latest crane technology.
Fortunately, you do not need to buy an overhead bridge crane again to benefit from the latest technology. Next, we look at two simple, cost-effective, small-scale retrofits that will make your existing cranes safer, more efficient, and lower operating costs, even if your crane has been around for decades.
LED lighting upgrade Can make your crane safer At the same time, you save up to 80% in energy costs and this is one of the quickest and most economical methods
Because of the lack of overhead light in the factory, which is often blocked by cranes, industrial cranes are usually equipped with lighting facilities. Standard cranes equipped with incandescent lamps, high-pressure sodium lamps or halogen lamps are helpful for lighting, but due to the divergence of the light emitted from them, the operator of the crane from the side can easily look directly at the lights, weakening the s/he seeing the lifting of the goods. vision.
LED lighting is different. Their high concentration of light greatly reduces the risk of blinding by operating lights, making it easier for operators to focus their attention on lifting goods and avoid obstacles. Moreover, like traditional types of lighting, LED lamps do not require long (up to 20 minutes) cooling before restarting. You can turn it off as needed. When you replace the existing lighting equipment on the standard 10-ton industrial crane with LED lamps, you can save up to 80% of the energy consumption for the crane. In general, the maximum power motor is a hoist motor, and the hoist motor is not continuously driven, so most of the energy consumption is in lighting facilities. Large cranes can also save 40-50% of the energy costs of the entire crane.
Other benefits: LED lights are instantly lit, long life, and do not need to be replaced as frequently as traditional lighting. At present, the new generation of LED lamps have a service life of up to 10 years under normal use. In contrast, standard lighting is more easily damaged by vibration and normal use, and it may need to be replaced every two to four years.
Refitting a crane with LED lighting is quite simple. If the crane is already equipped with lighting, just replace the light elements and switches. Due to the low energy consumption of LEDs, existing transformers are usually sufficient. If the crane is not currently equipped with lighting facilities, Ellsen can provide transformers, relays and all necessary components as well as installation instructions. Either way, replacements and upgrades usually take less than a day. If you do not want to replace it yourself, Ellsen technicians can help.
Remote upgrade A simple ergonomic change You can change your crane and workflow
How many of us get up to tune in the television channel? Running out. We use an easy-to-use remote control on our comfortable sofa or recliner. However, tens of thousands of cranes all over the world are still using communicators to control equipment. The operator must leave the Communicator position to operate the load and then move back to the Communicator position to move the load – coming and going back and forth numerous times a day.
If your operator can use the remote control at any time, how long can he save? More importantly, the remote control provides the operator with the safest way to operate the crane and the best field of view without being limited by the length of the communicator cable or the position of the mobile.
The operator can make faster, better and safer choices and move the crane to the best position. In some cases, the remote control can help the operator to perform certain tasks independently without the need for operators and assemblers to work together. When the plant crane covers a long period of time (sometimes 100 meters or more), the advantages of the remote control are even more pronounced.
Most standard cranes can complete remote control conversions in one day or less. The Ellsen CXT crane’s remote control and communicator use the same plug, so the upgrade plan is very simple. Ellsen can also modify remote controls for cranes with single and double hoists manufactured by other crane manufacturers, such as standard cranes, heavy-duty cranes and fine-manipulated cranes.
Each manager has the best understanding of the operation processes and processes of his factory Why don’t you think about the efficiency of these two upgrades for your work? What impact will it have? It can be said with certainty If you try to use LED lights or remote control on the crane Then you will get the benefits of energy saving and safer And there are opportunities to increase your productivity
Electromagnetic Crane is a kind of lifting machine that uses electromagnetic principles to carry steel articles.The main part of the electromagnetic crane is the magnet. Switch on the current, the electromagnet steel items to absorb, transport to the designated place. Cut off the current, the magnetism disappears, and the steel stuff comes down. Electromagnetic crane is very convenient to use, but it must be used with the current. It can be used in waste steel recovery department and steelmaking workshop.
The device that uses electromagnets to carry steel materials is called an electromagnetic crane. The electromagnetic lifting bridge crane can generate strong magnetic field force, tens of tons of heavy iron, iron wire, nails, scrap iron and other kinds of iron materials, cannot be packed or packaged, and can be easily collected and transported. It not only saves labor but also simplifies work. Steel materials and machines in wooden cases can be carried in the same way. When the crane works, as long as the electric current in the electromagnetic iron wire does not stop, the weight that is sucked will not fall and the invisible magnetic force is more reliable than the solid chain. If for some reason, cut off electricity, it will cause accidents, so some electromagnetic crane is arranged on the steel claw, to lift heavy objects transported, sturdy steel claw will automatically fall down tightly clasped them. Block crane can’t carry hot because the steel cannot be magnetized at high temperature. The electromagnetic crane can lift nearly 100 tons of weight in one stroke. The diameter of the electromagnet in the diagram is about 1.5 meters. It can bring up 16 tons of objects.
On February 21, 2008, the People’s Republic of China General Administration of quality supervision, inspection and Quarantine issued the “Crane Safety Technology Supervision Regulation – bridge crane“. The sixty-sixth electromagnetic crane’s lifting electromagnet shall be powered by a special circuit. Electromagnetic hoist should be able to guarantee the power supply of electromagnetic hoist when it loses electricity when it works.
Any detailed information you want to know about this kind of electromagnetic crane, welcome to contact us.
How to make the crane equipment to perform its maximum efficiency
With the increasing degree of lifting mechanization, the wide application of equipment not only accelerates the construction progress but also improves the quality of the construction.Since the lifting equipment is affected by various factors during the daily use, the performance of the equipment cannot be fully played.What should we pay attention to in our daily construction to maximize the performance of the equipment?
The construction unit shall make good rules and regulations for the equipment manager, and maintain the normal construction order of the unit. Especially for the units with the frequent mobilization of equipment and personnel, a sound management system material shall be established.
Crane manufacturers should supervise relevant staff to carry out the maintenance and repair system and safety operation rules, so as to ensure the safety and reliability of the equipment and personnel.In the equipment management, many units often have the concept of heavy use and light maintenance, which will easily bury the safety hazard to the equipment.
The operation of the hoisting equipment is not standardized, which will aggravate the wear and aging of the equipment.Some units still employ nonqualified drivers, which not only cause early damage to the equipment but also seriously delay the normal construction period.
In order to make the equipment most effective in the long run, besides the daily maintenance work, we also need to pay attention to the replacement and repair of equipment damaged parts, which can be eliminated at the beginning of the failure and avoid the safety threat to the construction workers.
There are uncertainties in the future of heavy equipment. With the development of social economy, the scale of production is expanding, and the degree of automation products is higher and higher. Crane is widely applied in the modern production process, and the application area is also widespread.One of the key development priorities of many industrial developed countries is the lifting of heavy transport technology.Analysis of development situation in 2011 lifting transportation equipment, “NPC and CPPCC” during the hot topic of concern in the heavy machinery industry is for stability, in the relatively stable market environment, should be on the basis of this, to improve the quality of hoisting equipment, in a stable domestic sales at the same time, should also be to expand the overseas market.Crane is the basic equipment of the construction industry and manufacturing industry. In recent years, the country has made great efforts to develop infrastructure construction, and all of them need a lot of high quality.
General bridge crane working situation
Single beam crane is widely used in factories, warehouses, materials and other occasions to lift goods, and it is forbidden to be used in the flammable, explosive and corrosive medium.
There are two forms of operation on the ground and in the air.The ground operation has two kinds of handle operation with line handle and the handle of the remote control. The air operation refers to the operation of the driver’s room.There are two kinds of the cab, open and closed, which can be divided into the left or right side installation according to the actual situation. The two forms have two kinds of entry direction: side and end, so as to meet users’ needs under different needs.
Single beam crane is widely used in machinery manufacturing workshop, metallurgical workshop, petroleum, petrochemical, port, railway, civil aviation, power station, paper making, building materials, electronics and other industries workshop, warehouse, material yard, etc.It has the advantages of compact shape, the low height of building clearance, light self-weight, small wheel pressure and so on.
what do the mainstream technology trends show in construction machinery industry?
Core tips: Construction machinery gradually began to pick up in 2017, but the uncertainties that affect the economic operation of the industry still exist. Experts predict that the machinery industry will still undergo a severe test. With the gradual attainment of the national macro-control policy, the macroeconomic situation will gradually improve, the downward trend in the machinery industry will gradually stabilize, and the positive factors in the development of the industry will also accumulate. Some enterprises, industries, and regions that started restructuring earlier will gradually accelerate the recovery. Technology leads the future, innovation drives development. So, what are the major trends in the construction machinery industry technology trends? Modular design and virtual manufacturing Modular design includes the previously mentioned components.
Construction machinery gradually began to pick up in 2017, but the uncertainties that affect the economic operation of the industry still exist. Experts predict that the machinery industry will still undergo a severe test. With the gradual attainment of the national macro-control policy, the macroeconomic situation will gradually improve, the downward trend in the machinery industry will gradually stabilize, and the positive factors in the development of the industry will also accumulate. Some enterprises, industries, and regions that started restructuring earlier will gradually Accelerate the recovery. Technology leads the future, innovation drives development. So, what are the mainstream technology trends in the construction machinery industry?
First, the modular design and virtualization manufacturing
Modular design includes the previously mentioned part of the generalization and design of software modules. Modular design software allows different systems or components to be assembled on the computer and change parameters, which greatly accelerated the design of new product development progress. Information technology and the global economy have created the conditions for the virtual manufacturing of machinery manufacturing. Among the major multinational construction machinery companies, a clear trend is for manufacturers to focus their efforts on research and development and assembly of equipment, not manufacturing parts, and pushing it to parts suppliers. Host product manufacturers and component suppliers and research and development institutions to work together to play a creative spirit of all parties to jointly develop and produce marketable products.
Second, the coexistence of personalized and multi-functional
The different types of engineering, materials, scale and different construction environment put forward the requirements of individualization and multi-function for construction machinery. The development of modern design technology and flexible manufacturing technology also created the conditions for the realization of product individuation and multi-function. Personalized products are adapted to a particular situation and appear, and a multi-purpose construction machinery is the development of another direction, which will undoubtedly increase the utilization of equipment. Third, increasing environmental protection requirements
For the sake of the sustainable development of human society and economy, the world public has put more and more strict requirements on environmental protection. Whether the construction machinery has good environmental performance will become one of the important indexes for participating in the international market competition. Nowadays, many industrial developed countries, “Market Access Card.” Therefore, all countries in the United States, Europe, Japan actually developed engineering machinery that is “friendly to both people and the environment.” Fourth, to speed up the upgrading
With the development of modern technology, the technology development and innovation of the world’s construction machinery products have been accelerated and the cycles of replacement have been shortened. The product families have been broadened and the product series become more sophisticated. The major US, European and Japanese companies have introduced the cameras The second generation, the third generation until the fifth generation of new construction machinery products. Fifth, small and large size with the development
Large and medium-sized construction machinery is still the mainstream of construction machinery in the world, with annual sales of about 70 billion U.S. dollars. However, the tendency of construction machinery to extend toward both ends of miniaturization and large-scale construction is obvious. The United States, Europe, and Japan are the major consumer markets for construction machinery. As their large-scale infrastructure construction projects have been declining while those for repairing, protecting and urban small-scale projects are on the increase, in order to save labor and labor costs and increase work efficiency, various small, Micro-engineering machinery have come out. This machinery and equipment can be used for construction work in narrow areas or in residential homes and small-scale construction projects.
Sixth, the concept of industrial design throughout the product design
Industrial design is the product of the design, also known as the product’s artistic style. Construction machinery design can make the shape of the machine and its structure, function and use requirements of unity, and with people’s physical and mental coordination. This design should include the appropriate proportion of the ministries, body shape, color coordination, beautiful appearance of the instrument layout, as well as easy to operate intuitive and eye-catching trademark symbols. At present, the world’s major companies attach great importance to the industrial design of products that led to the emergence of a special research and design agency.
Seventh, robots to help create construction machinery
Ergonomic principles have been valued Since the 1980s, many of the world’s largest construction machinery manufacturing companies have invested a lot of manpower and funds to research and application of modern design methodologies Ergonomics Advocate people-oriented design ideas, pay attention to the machine Coordination with people. The application of electronic technology in construction machinery greatly simplifies the driver’s operating procedures and improves the technical performance of the machine. The use of electronic control can automatically select the machine mode of operation; the use of electronic monitoring can promptly detect and eliminate the failure of the machine system; the use of electronic sensors by microcomputer processing can automatically detect the quality of the machine.
Robots play a “catalyst” role in the transition of emerging and traditional industries. In the construction machinery industry, robots often perform spot welding, arc welding, painting and assembly on the production line. This not only ensures the stability of product quality and improves the efficiency of labor productivity, but also improves the working conditions and labor intensity of workers. In recent years, China’s construction machinery industry usher in rapid development, the urgent need to upgrade and restructuring, enterprises want to grab more competition in the market share and get rid of homogenization of the product competition, we must strengthen the level of automation of the production line, vigorously introduce the robot will not Or missing.
In addition, the performance and price of construction machinery products depend greatly on these spare parts, such as transmission parts, control components, diesel engines and key hydraulic components such as high-tech, high value-added core components, and in our country these projects Mechanical core parts mainly rely on imports, a serious constraint on the situation of China’s construction machinery enterprises to further develop and grow. Because foreign companies that control the core spare parts usually take the form of starvation sales, only a certain number of accessory products are produced each year, so as to achieve the purpose of guaranteeing price control. As an emerging industry that is nurturing and growing, there are still outstanding problems in the intelligent manufacturing equipment industry in our country. The main problems are as follows: weak technological innovation ability, limited core technologies such as new sensing and advanced control, small industrial scale, small industrial organization, , Weak and lack of internationally competitive backbone enterprises; industrial base is weak, high-grade and specialty sensors, intelligent instrumentation, automatic control systems, high-end CNC system, the robot market share of less than 5%. Eighth, operating principle breakthrough
Operating principles of innovation and breakthroughs, working principle of construction machinery, including earthwork cutting, crushing, backfilling, geotextile screening, mixing and heating, paving the mixture, leveling, and compaction. The theory of these operations was originally based on bionics and Newtonian mechanics, while the development of shock science laid the foundation for the new operating principle of construction machinery. For example, the application of mechanical vibration, pulse, jet, photoelectric effect, and thermophysics has created the conditions for the construction machinery to save resources, improve the project quality, improve the production efficiency, work reliability, driving comfort and automation.
Ninth, hydraulic transmission
In the 1960s began to be applied to the roller, only 10 years time has been promoted and popularized. The existing road roller walking, vibration, steering machine brake and other systems have achieved full hydraulic transmission. Hydraulic transmission greatly simplifies the design of the roller drive and control system, hydraulic transmission smooth and easy operation, easy to implement stepless speed control and automatic control, to improve the overall roller production efficiency and compaction quality.
Tenth, one of the telecommunications and intelligent process
Modern engineering machinery should give humanity and spirituality. Spiritual construction machinery is an integrated system of mechano-telecom transmission with thought and mind sensing organs, neural networks, internal organs and hand, foot and skeleton. Electronic technology and sensors and mechanical devices combined to achieve automatic monitoring of construction machinery and automatic control, that is, the integration of telecommunications. The electronic sensor is one of the sensors of the machine and the organ of the machine. It is the medium between the machine and its work object. The electronic technology which is the core of the computer is the brain and central nervous system integrated with the machine and telecommunications. It accepts all kinds of information sent by the sensor, After processing the execution part of the machine instructions.
A High-Performance Hoist Crane by Ellsen Bridge Crane Machinery
Hoist crane refers to the hoist lifting mechanism for the crane. Because of its simple structure, easy operation, low cost, in the machinery, chemical, light industry, railway and other industries are widely used. Due to the particularity of this crane, ground operators often have multiple functions and also have many unsafe problems in their operations, operations and command tasks.
In order to prevent crane accidents such as lifting, GB6067-1985 “Safety Regulations for Lifting Machinery” and other relevant national standards have required hoist crane must have safety devices, such as a limiter, end stop, buffer, safety brake and so on. These safety devices equipped with effectively improve the safety and reliability of hoist crane, but due to design, manufacturing and other defects in its own production, the current hoist crane safety precautions are not perfect, according to the daily inspection experience found gourd crane in the wrong phase phase protection, anti-broken shaft protection, to prevent the electric hoist fall protection, the buffer settings and so there are still flaws or deficiencies.
Three-phase Asynchronous Taper Brake Motor
As the gourd crane uses three-phase asynchronous taper brake motor as a power unit, and the three-phase asynchronous motor operating direction and the power supply phase sequence related to the power supply when the phase sequence changes, the motor running direction and the original running direction On the contrary, at this time press the “down” button, the spreader rises, and rose to the limit position limiter does not work, likely to cause accidents. Such cranes happen each year due to misplaced roll crushing, hook group squeeze deformation, broken wire rope accident. At present, China’s production and widespread use of CD, MD-type electric hoist did not take the wrong phase-off protection (electric hoist does not require the installation). In order to prevent the wrong phase caused by the occurrence of serious injuries, in the gourd crane electrical control system to add the wrong phase protection device.
When the power supply phase failure or wrong phase, the wrong phase protectors work, the total power contactor disconnected, the power must be restored to normal after the crane can continue to work. This will not only prevent the power supply caused by the wrong roll crushing but also prevent motor phase loss of burning. Therefore, the wrong phase-phase protectors’ role is necessary.
Top Quality Configured Electric Hoist
Electric hoist in operation, due to the wheel rim and wheel tread wear, the gap between the wheel and the rail gradually increased, this time if you can not adjust the operating gap in time, the electric hoist may be off the track, causing a heavy injury accident; the same time Due to the particularity of wheel axle assembly, it is not easy to find the cracks on the axle. Cracks cannot be effectively controlled. The axle may break and cause a crash accident. In order to prevent the electric hoist caused by the fall of the accident occurred in the electric hoist additional anti-breaking shaft, derailment protection device. When the electric hoist derailment or broken shaft, the anti-off axis, derailment protection device can be effectively suspended on the track, thus avoiding the occurrence of lifting injury.
Strictly Meet National and International Standard
According to GB6o67-1985 (Crane Safety Regulations, the provisions of the operation of the electric hoist terminal must be added to the buffer.Because the installation location of the device is not clearly defined, the current domestic use of electric hoist buffer is generally installed in the work When the electric hoist running wheel and the buffer collide, the buffer has played a role in absorbing energy, but due to the particularity of electric hoist structure, running the flange of the suspension wheel and the buffer collision, the inertia The role of the suspension wheel flange so that the buffer wear is extremely serious.
When the electric hoist is running for a period of time, the damper loses its original design function so that the safety factor of the electric hoist increases and the stability of the electric hoist declines drastically. In order to prevent the occurrence of this failure, the buffer can be installed at the location of the lower surface of the I-beam, the use of buffer and electric hoist suspension play a role in the buffer collision, improve safety and reliability, to extend the life of the buffer. Any detailed information about the hoist crane, welcome contact us with your detailed inquiry.
In this post, Ellsen overhead bridge crane factory provides some knowledge of crane structures for your reference. The transmission system that can make the crane take some action is referred to as the crane’s mechanism.Due to the needs of lifting and transportation operations, cranes need to move up, down, move, rotate, change, climb and telescope and other actions, and these actions must be completed by the appropriate agencies.
The basic structure of the crane lifting, running, turning and luffing.In addition, tower cranes tower crawler body and cars, tires and other crane-specific telescopic retractable legs.
Each of the cranes consists of four mechanisms, namely a drive, a brake, a transmission and a dedicated device that is directly related to the functioning of the mechanism.
Drives are manpower, mechanical and hydraulic drives.The brake device is a brake.Different types of cranes use a variety of different types of brakes, such as block, disc, band, internal shoe, and cone.
Lifting Mechanism of the Crane
The driving mechanism of the lifting mechanism adopts electric drive as the electric motor.Among them, gourd crane multi-purpose asynchronous squirrel-cage motor, other electric cranes and more use of wound induction motor, or DC motor.The track, rail crane lifting drive is for the internal combustion engine.Car, tire crane lifting mechanism drive is driven by the prime mover hydraulic pump, hydraulic cylinder or hydraulic motor.The lifting mechanism is shown in Figure 1.In the picture, the take-up winding device includes a lifting reel (or sprocket), a wire rope (or a chain), a fixed pulley, a movable pulley, a hook (or a grab, a ring, a crane beam, an electromagnetic chuck)
1.Electric motor 2. Brake 2.Reducer 4. material taking and winding device
Crane operating mechanism
Crane operating mechanism can be divided into the rail-type operating mechanism and non-rail-type operating mechanism (tire, track-type operating mechanism), where only rail-type operating mechanism introduced.Rail-line operating mechanism in addition to railway cranes is basically a motor-driven form, as shown in picture 2.This operating mechanism is composed of motor 7, brake 8, reducer 5 and the wheel 1,2 four parts.
Wheel device is composed of the wheel, wheel shaft, bearings and bearing boxes and other components.
The use of rimless wheels is to change the sliding friction of the rim into rolling friction, at which time a horizontal guide wheel should be added.Wheel and wheel shaft connection can be a single key, spline or cone sleeve and other means. Crane operating agencies are divided into centralized drive and drive two kinds of forms.
The centralized drive is a motor driven by the drive shaft on both sides of the wheel running in the form of running agencies, as shown in Figure 2.Centralized drive only suitable for a small-span crane or crane operating mechanism.
The separate drive is on both sides of the wheel by 2 sets of the independent mechanical drive mechanism in the form of links, as shown in Picture 3.
1. Motor 2. Brake 3. Gear reducer 4. Wheel unit
With the development of hoist crane technology, the motor uses tapered brake motor, the two functions of drive and brake combined, and further developed into the motor, brake and reducer combined into one, no longer need to link The shafts are connected to form a very compact unit, known as a conical brake motor, which has now been applied to cranes and carts as shown in Picture 4.
1. “Three in one” drive 2. Wheel device
Any detailed information you need about the crane, welcome contact us.
The structure of bridge crane and the installation of the car
The bridge is the main body of the bridge type crane, its erection and assembly have strict technical requirements, and there is a set of strict measurement methods.
To measure the installation results.
Before the installation will be bundled with the hook off for welding into the girder web, transportation.
Installation methods and requirements.
The crane, which is required to be erected as a whole, should be supported on a rack that is temporarily lifted by the span of the crane to leave the main beam out of the ground.If the rail can be laid on the shelf, the cartwheel can be placed directly on the rail.Otherwise, the lower level cover of the main beam should be placed near the two ends of the main beam.No matter which method is used, you need to use the level meter to find the right.For rail laying, the horizontal plane is used as a benchmark to find the level. The level of the bridge is measured at the distance between the centerline of the end beam and the center line of the car track when the cushion is under the main girder.Before measuring the horizontal position, the end beam should be connected by the method specified by the pattern (or with the hinged hole bolt or the reaming axis).A cone tread wheel should make contact with the side wall of the steel rail flange, to prevent movement and affect the level of accuracy.The quality of a bridge that requires the supporting point of a bridge to be located under the wheel.
Installation and inspection on the ground are much more convenient than erecting in the air, and it is easy to repair more than the specified error or damaged part.However, due to the limitation of erection and hoisting equipment, sometimes they have to be disassembled, then they are installed on the rail carrying beams of the workshop, then assembled, especially large tonnage cranes.
The Installation of an Overhead Crane Car
The assembly of the car is generally installed in the manufacturing plant, and it can be placed on the bridge when it is shipped to the use unit.The car that is transported separately for a variety of reasons should be reassembled and fastened according to the technical requirements of the drawings.The reassembled car should check the size of the small wheels to meet the technical requirements.The inspection methods and specific provisions are the same as the measurement methods mentioned above in the structural installation of the overhead crane and the installation part of the car operation mechanism in the third section of the installation of large and small cars. If you need our crane services, welcome contact us.
The main performance parameters of hoisting crane machinery include lifting capacity, working class, lifting torque, lifting height and working speed.
Overhead Crane Capacity
Weight refers to the quality of the crane can lift a weight, which should include the quality of sling and iron pole or a container, it is an important parameter to measure the crane working ability.It is usually called the rated weight and is expressed as “Q”.The weight – starting unit used to be used as “t” and now is represented by “kN” (10kN is approximately equal to 1t).
With the change of the working range of the crane, the crane’s weight also changes.Therefore, the rated weight has the maximum weight and maximum lifting weight.The maximum weight refers to the basic boom in maximum weight lifting allowed minimum amplitude; the biggest weight refers to the basic boom in the maximum weight lifting maximum amplitude at.General crane rated lifting weight refers to the basic boom in maximum weight lifting allowed minimum amplitude when the crane is calibrated on the nameplate capacity.
The working range refers to the horizontal distance between the central axis of a crane and the center line of a hook under the rated load. It is usually referred to as the radius of gyration or the radius of work. It is represented by “R”, and the unit is “m”.The working range indicates the working range of the crane when it does not shift. It includes two parameters, the maximum amplitude, and the minimum amplitude.For the pitching amplitude boom, when in a horizontal angle close to the level of 13 degrees, the maximum horizontal distance from the center to the center of the hook crane slewing axis line, the biggest; when the boom up to the maximum angle (the average angle of 78 degrees), the rotary center axis to hook the distance of the center line of the minimum. Minimum amplitude.The trolley jib, when small cars to the arm head end position, the biggest; when the car is boom root end position, minimum amplitude.
The lifting weight of the crane varies with the amplitude, and the same crane has different ranges and its weight is different.For a wheeled crane with leg support, it should also be expressed in the effective range of A, that is, the horizontal distance from the center of the hook to the center line of the side leg when the leg is working laterally.The effective range reflects the actual working ability of the crane. The working range is expressed by A1 (single tire) or A2 (A2 twin) without using outrigger to work laterally.
The lifting moment is the product of the crane’s lifting weight and the corresponding amplitude.The unit of lifting torque used to be expressed by t*m. Now it is expressed by kN*m. It is a crane’s comprehensive lifting capacity parameter, which can comprehensively and accurately reflect crane’s lifting capacity. The tower crane needs to work in a large range, so the lifting torque is used as the main parameter to express the model.The lifting torque of a tower crane usually refers to the lifting moment of the maximum amplitude.
Crane’s hoisting characteristic curve is a curve showing the relationship between crane’s weight and amplitude. Different amplitude has different rated weight. It can connect different amplitudes and corresponding rated lifting weights to line, and it can be drawn into hoisting characteristic curve.All the cranes have this curve near the control table so that the operator can quickly find out the maximum lifting weight of the crane at a certain extent.To be equipped with several different arm length of the crane, each of which corresponds to the length of the jib crane has its characteristic curve.
Overhead Crane Lifting Height
The lifting height refers to the distance from the ground to the hook and the center of the hook, and the calibration value of its parameters is usually expressed as the rated lifting height.The rated lifting height refers to the rise of the hook to the maximum limit of the full load, from the center of the hook to the ground.When the hook needs to be lifted below the ground, the depth of the ground below the ground is called the lower depth, and the total lifting height is the sum of the lifting height and the lower depth.
For the jib crane, when the boom length, lifting height increases with the magnitude of the reduction, this feature can be used to lift height curve representation, and its corresponding lifting performance curve.
Overhead Crane Working Speed
The working speed of the crane includes the speed of lifting, amplitude changing, turning and walking.The rise and rise speed of the lifting speed refer to the rising or falling speed of the lifting hook, and the unit is “m/min”.The lifting speed of the crane is related to the lifting speed of the hoisting mechanism, and it is related to the ratio of the hook pulley group.The rope is twice as fast as the rope; the single rope is twice as fast as the double rope.Generally, the lifting speed parameter should be indicated, and the number of rope should be marked.
Amplitude variable amplitude speed is the average line speed of the hook from the maximum to the minimum, and the unit is “m/min”.The pitching amplitude is the amplitude speed up boom boom rising and falling speed, generally falls faster than the arm lifting arm speed.
The rotation speed of the rotary speed refers to the number of revolutions per minute of the crane in the case of no load, and the unit is “r/min”.
Walking speed is the maximum speed of a crane when it is not loaded, and the unit is “m/min”.Walking speed is the maximum speed of a crane when it is not loaded, and the unit is “m/min”. Any need for the crane specification and costs, be free to contact us.
Mechanical design includes the following two designs: developing new machinery with new technology and new method; redesigning or reconstructing locally on the basis of original machinery, so as to change or improve the performance of the original machine. The quality of the design is directly related to the performance, price and economic benefit of the mechanical products. Mechanical parts constitute the basic unit of the machine. Before discussing the basic requirements of machine design, we should first understand some basic requirements of designing mechanical parts.
Basic requirements for the design of mechanical parts
The reliability and low cost of the parts are the basic requirements for the design of mechanical parts. The working capacity of a part refers to the ability to resist the possible failure of a part under a certain working condition, which is called the load capacity for the load. Failure means that parts can not work properly for some reason. Only each part can work reliably in order to ensure the normal operation of the machine.
The design of mechanical parts must also adhere to the economic point of view, and strive to achieve a high comprehensive economic benefit. To this end, we should pay attention to the following points:
Reasonable selection of materials to reduce material costs;
Ensure good technology and reduce the cost of manufacturing.
Standardize and general-purpose design, simplify the design process and reduce the cost.
The design of mechanical products should meet the basic requirements of the following aspects
Realize the predetermined function: the designed machine can realize the predetermined function and can operate normally under the prescribed working conditions and the prescribed time limit.
Reliability requirements: the machine consists of many parts and components, whose reliability depends on the reliability of the zero and the components. The more the parts and parts of the mechanical system, the lower the reliability, so the number of parts should be reduced when the machine is designed. But at present, it is difficult to put forward a unified assessment index for the reliability of mechanical products.
Meet the economic requirements: the economic index is a comprehensive index, which requires a low cost in design and manufacturing, high productivity, less energy and material consumption, low maintenance and management cost.
The operation is convenient and safe to work: the operating system is simple and reliable, which helps to reduce the labor strength of the operator. There are various kinds of insurance devices to eliminate the danger caused by misoperation and avoid accidents of personal and equipment.
Beautiful appearance and less pollution. The industrial form design method is applied to the industrial modeling design of mechanical products, so that the designed machine is not only good in performance, small in size, low in price, but also beautiful in appearance, and full of the characteristics of the times. The modeling of mechanical products has a direct impact on the sales and competitiveness of the products. At present, it is a link that can not be ignored in the mechanical design. Reduce the noise as much as possible and reduce the pollution to the environment. In a sense, noise is also a comprehensive indicator of mechanical quality.Beautiful appearance and less pollution. The industrial form design method is applied to the industrial modeling design of mechanical products, so that the designed machine is not only good in performance, small in size, low in price, but also beautiful in appearance, and full of the characteristics of the times. The modeling of mechanical products has a direct impact on the sales and competitiveness of the products. At present, it is a link that can not be ignored in the mechanical design. Reduce the noise as much as possible and reduce the pollution to the environment. In a sense, noise is also a comprehensive indicator of mechanical quality.