Original Abstract
Hydraulic lifting platform is a versatile crane lifting equipment, widely ud in factories, docks, construction, transportation, sports, equipment maintenance and other high-altitude operations and maintenance. Existing hydraulic lifting platform there are many, can be roughly divided into: four-wheel mobile lifting platform, push-type lift platform, car load lifting platform, fixed platform lift, scissor lift platform, four-post lift The two column lift and so on.
In recent years, with the rapid increa in the u of cars, China's booming auto industry, especially the car industry. This makes the auto repair industry has grown, demand for automotive maintenance equipment rapid expansion, but also the maintenance requirements in the automotive tools and equipment requirements on the increasingly high lift vehicle repair workshop is esntial and most important maintenance machinery and equipment. The role of auto lift car is in need of repair, a smooth upgrade to the appropriate height, so that maintenance workers at the bottom of the car chassis maintenance and inspection. Generally divided into high column car lift and scissors. Either way, are required to meet the synchronous lifting the car, cornering can not happen, and asked for the empty chassis bottom for easy maintenance workers for maintenance work which requires lifting platform synchronous lifting, running smoothly. Therefore, maintenance of the car lifting platform equipment is g
enerally driven by hydraulic system.
With the expanding rvice ctor, as well as the further development of automation, the maintenance staff to reduce labor intensity, making the easy maintenance, and can better improve the efficiency of vehicle maintenance, and car maintenance rvice quality, so the hydraulic lift Platform automation requirements are also rising. Vehicle maintenance is currently required to meet the synchronization control, lifting the platform lift system depends mainly on the hydraulic system and electrical control and drive systems, but the lift platform is currently owned by the widespread leakage, internal leakage, short life, the operation not flexible, synchronous operation and low defects. To avoid the disadvantages, require more preci synchronization to ensure that the hydraulic lifting platform lift precision, and now most of the hydraulic lifting platform simultaneously phasing out all traditional hydraulic valves, the u of more preci control of the new electro-hydraulic rvo valve, electro-hydraulic proportional digital electro-hydraulic valve and valve to control the hydraulic system, to achieve synchronization and high precision. As a form of electro-hydraulic proportional valve type of diver, easy to u composition of a variety of electrical and computer-controlled hydraulic system, control of high precision, installation flexibility and strong anti-pollution and many other advantages.
Currently ud in the automotive repair Hydraulic synchronous lift platform vehicle maintenance plays an important role in synchronous lifting platform on a variety of hydraulic valves, hydraulic cylinders, hydraulic pump station innovation and improvement, making a hydraulic lifting platform synchronization smooth
running, low noi, fast respon, high precision synchronization of the repair and maintenance in the car played a crucial role.
With the hydraulic lift platform in the automotive repair industry, application and further improvement and innovation in the maintenance of hydraulic lifting platform has the car can achieve more complex functions, the structure of the platform, drive on, and a variety of control systems, has been greatly improved. The current lift platform lift system is mainly driven by the hydraulic system, of cour, do not rely on hydraulic pressure, as well as dual-u diel electric rotary lift platform, now appeared battery driven lift platform, continuously variable transmission can be achieved with safer, more convenient and low noi advantages. Lifting platform is currently widespread leakage, internal leakage, short life, the operation is not flexible, synchronous operation and low defects. To avoid the disadvantages, require more preci synchronization to ensure that the hydraulic lifting platform lift precision, and now most of the hydraulic lifting platform simultaneously phasing out all tr学生书法作品
aditional hydraulic valves, the u of more preci control of the new electro-hydraulic rvo valve, electro-hydraulic proportional digital electro-hydraulic valve and valve to control the hydraulic system, to achieve synchronization and high precision. As a form of electro-hydraulic proportional valve type of diver, easy to u composition of a variety of electrical and computer-controlled hydraulic system, control of high precision, installation flexibility and strong anti-pollution and many other advantages, applications become increasingly broadened.
In China, although synchronous hydraulic lifting platform for such development, production started late, but with China's rapid economic development, in order to adapt to China in various fields ud by the synchronous hydraulic lifting platform development needs and take the large-scale, standardized , intensive, product support rvices, achieving mechanical, electrical, fluid integration platform in the application of synchronous movements. The u of synchronous hydraulic lifting platform surface, the rvice has been expanding, is now in rapid development stage, and now hydraulic lifting platform reliability, curity, easy operation and simple directness, and other aspects greatly improved, and with the the popularity and development of computer and mechanical, electrical, fluid integration progress of the study, major domestic and foreign companies have to compete with the computer (electronic) control system to improve overall performance and reduce th
e u of hydraulic components, machine, reducing the whole size and weight, improve the nsitivity of control and synchronization accuracy. In particular, the manufacturers actively introducing and digesting foreign advanced technology, development of new varieties, improving product technology and quality level, has been part of the hydraulic lifting platform synchronized at or clo to the international level of similar products.
Currently ud in the automotive repair Hydraulic synchronous lift platform vehicle maintenance plays an important role in synchronous lifting platform on a variety of hydraulic valves, hydraulic cylinders, hydraulic pump station innovation and improvement, making a hydraulic lifting platform synchronization Smooth running, low noi, fast respon, high precision synchronization, for the repair and maintenance of the car plays an irreplaceable role in a wide range prospects.
Therefore, the lifting platform for further rearch and improvement, optimize system performance and structure to further improve to make up for the shortcomings of existing technology has important significance.
The subject of the design of the hydraulic lifting platform main u of theoretical rearch and design, through the understanding and study of the hydraulic system, as well as existing control tech
nologies and more in-depth rearch and development, in the hydraulic system components and further understanding and learning , Combined with the modernization of hydraulic components and automation and control components within the hydraulic control through traditional high-tech components and control elements of existing comparative and comprehensive application of the traditional hydraulic system, bad on the rearch and design more innovative t of machines , Electricity, liquid in one of the hydraulic control system, makes the system more stable and faster to achieve the advantages.
Hydraulic lift platform system, requires the ability to achieve four-wheeled vehicles in a controlled synchronous lifting height lifting range, to achieve safe and reliable control of the two front, two rear, two revolvers, two rounds of synchronous lifting the right and to ensure synchronous movements accuracy. The hydraulic lift system also must have a fast respon speed, hydraulic power units, small size, compact structure, large power weight ratio, ea of manipulation and control, labor-saving convenience and easy to implement automated, with overload protection for high reliability requirements system, excellent technical performance, while ensuring synchronous hydraulic lifting platform can be anywhere in the vertical direction on a longer time (60 min or longer) within a reliable locking, the system can work continuously and reliably, the system energy efficient, easy to maintain
low cost. Hydraulic lift platform to meet system design requirements, synchronous movements smooth, and the design to achieve the functional requirements, develop the system clod-loop control of hydraulic systems, hydraulic systems ud to satisfy the synchronization requirements of precision and control to achieve the four-wheeled vehicles in a controlled synchronous lifting height lifting range, to achieve safe and reliable control of the two front, two rear, two revolvers, two rounds of synchronous lifting the right and to ensure the accuracy of synchronous movements.
To meet the synchronous lifting hydraulic system, the system needs to have synchronization control device to achieve synchronization. Synchronization of hydraulic system is currently running multiple control methods, mainly mechanical synchronization method, pump or motor parallel method, double rod cylinder in ries, control valve, synchronizer, synchronization control valve circuit, rvo and so on.
According to the design of machinery and equipment requirements for the realization of a better two-car front-wheel, two rear, two revolvers, two synchronous lifting the right wheel, respectively, the flexible control, the design of the four hydraulic cylinders ud for its intended to achieve their respective parts of the wheel lift and flexible control. Synchronization to achieve higher accuracy and more flexible control, the design does not u the traditional control valves to control, but intends to
adopt more new electro-hydraulic proportional control valve to control. Electro-hydraulic proportional control valve is between the ordinary hydraulic valve
股海明灯and rvo valve between a fluid control valves, rvo valves with similar functions, but also has its specific advantages. Proportional solenoid valve is replaced by the proportion of ordinary hydraulic valve adjustment and control devices and form, it can be given input voltage or current signal proportional continuous, remote control of the direction of flow, pressure and flow. Reasonable u of electro-hydraulic proportional control valve can improve the automation and accuracy, and simplify the system. Commonly ud proportional valve can be divided into: proportional pressure valve, proportional flow valves and proportional directional valve three.黄色小书
The design us electro-hydraulic proportional control system, clod-loop feedback control system, the detection by the nsor and fed back through the electro-hydraulic proportional plc valve, electro-hydraulic proportional control valve opening size corresponding to the achievement of the hydraulic cylinder to achieve synchronous lifting control accuracy. To ensure the hydraulic cylinder to achieve at work to ensure lf-locking, hydraulic system should be in each cylinder fuel supply system with check valve to achieve lf-lock function to ensure the safety of hydraulic lifting platform. Overload protection to ensure the realization of the hydraulic system, hydraulic system relief valve in
工作鸡汤>高效记单词
the hydraulic pump that needs to be installed to ensure the safety of the system to provide a certain pressure. Oil to the system to meet the system requirements to run and quality of hydraulic oil, hydraulic system should be in the inlet and outlet port to install filters. In order to meet the hydraulic system can be fully automated, the system of hydraulic directional control valve solenoid valve are ud. In order to better respond to energy problems, you can, where necessary, instead of using the accumulator motor-driven pump provides the pressure accumulator to provide the direct u of the hydraulic cylinder pressure to meet the relevant sport.
In order to achieve lf-locking hydraulic cylinder to the function of the hydraulic system in the bottom of each cylinder are equipped with check valve, check valve can achieve one-way lf-locking, two-way communication function of the oil. In order to provide curity to meet the hydraulic system pressure, not suddenly as high pressure hydraulic system of the adver effects or even damage some of the hydraulic components, so as a safety valve with pressure relief valve to prevent hydraulic overload protection. In order to achieve automation of the hydraulic system to meet the simultaneous operation of the system is more accurate, and the realization of the system's high efficiency, rapid respon requirements, the u of electro-hydraulic proportional directional control valve to high precision, fast respon to the synchronization control. Most of the traditional manual c
卫生经济学
ontrol valve, which controlled comparison machinery, it is difficult to achieve automation. Electromagnetic valve, u the pull solenoid valve to control the direction of control of the commutation circuit to achieve better automated results. Shunt valve asmbly, also known as synchronous valve, is a hydraulic diversion valve, valve functions in one t of the independent hydraulic device. Shunt valve synchronization is the t speed sync, that is, when two or more cylinders cylinder under different loads, respectively, the shunt valve t pressure and flow through the nsitive internal components automatically adjust the fuel tank of exerci to maintain synchronization.
一种爱
Shunt valve asmbly is mainly ud in multi-cylinder hydraulic cylinder and the synchronization control system. Split t by the synchronous control flow valve hydraulic system has a simple structure, low cost, design, ts, debugging and ea of u, reliability and many other advantages, which shunt valve asmbly in the hydraulic system has been widely ud, so there will also be a reasonable t of flow diversion valve ud to achieve simultaneous control of two hydraulic cylinders. In the hydraulic system, the oil cleanliness of the normal operation of the hydraulic system has a vital role, so the oil pump and fuel tank return port port filters have been installed in order to ensure that the cleaning fluid degrees, which is an indispensable circuit hydraulic system attachment.
In this system, due to the beneficial effects of gravity, the decline in the cour of lifting platform, you can completely rely on gravity to provide power, where only one-way valve on the hydraulic control valve port for remote control of the pressure to provide, in under the action of gravity to allow check valve can be decread to achieve oil return channel, as the pressure is not big, so no need to re-u of oil pump drive motors to achieve the check valve through the oil pressure can be ud directly to provide the pressure accumulator, so the treatment, not only simplifies the system control, and can better save energy and avoid frequent start the motor, can effectively extend the life of the motor and pump, and to improve the efficient u of the hydraulic system, which can be said that the biggest advantage of the system design.
Hydraulic platform of exerci is to achieve the various hydraulic cylinders ri and fall, but the ri and fall during the lifting pha will be a period in the acceleration of movement, until the required speed to the speed, the platform will achieve a uniform motion and then decelerate to stop. Throughout the campaign process, the hydraulic lifting platform mainly by the external load platform of the car's own weight of gravity and composition. Therefore, the size of the external load is relatively stable and unchanging, and only in the acceleration pha of operation of the entire platform will have a maximum load.
Hydraulic lifting platform synchronized variety of mechanical structure, a four-wheel mobile lifting platform, elevating platform vehicle-mounted, fixed landing platform, ts of cylinder-type lift platform, four-column lifting platform, the two-column lifting platform, scissor Lifting platform, and other mechanical structure, and mechanical structure of different ways to achieve different movements to meet the different, specific ways of working and working environment.
资料员岗位职责The design of synchronous hydraulic lifting platform is designed to meet the car repair industry in the u of lifting platform. Maintenance workers to consider maintenance when the car convenient and comfortable, you need to lift the car a certain height, but such u conditions, most of the requirements of hydraulic lifting platform is fixed, so the fixed hydraulic lift platform. While the four cylinder design can be fixed in the foundation, and to consider their own characteristics and the hydraulic cylinder the height, you can dig a pit in the maintenance shop type of foundation, the four cylinder bolts to fully firmly fixed to the ground by on. In order to be able to check and repair chassis, hydraulic lifting platform not designed for the whole plate fixed on the hydraulic cylinder in the bottom four shelves, is thoughtful, I
