Hydraulic drive system of railway crane
A driving system and crane technology, applied in cranes, fluid pressure actuators, mechanical equipment, etc., can solve the problems of high cost, inconvenient maintenance, and large size of the reducer, so as to reduce maintenance costs, reduce manufacturing costs, and maintain convenient effect
Active Publication Date: 2015-10-21
CNR LANZHOU LOCOMOTIVE
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Problems solved by technology
[0003] In the prior art, the hydraulic drive system of the railway crane can provide working pressure for the boom and provide power for walking; however, the power provided for walking is constant, and it is necessary to achieve high speed through the multi-stage speed ratio transmission of the reducer. Switching between the walking state and the hoisting independent walking state, and this type of reducer has high cost, large dimensions, and is not easy to maintain. Therefore, the manufacturing cost and maintenance cost of the existing railway crane are relatively high
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[0009] figure 1 It is a structural schematic diagram of an embodiment of the railway crane hydraulic drive system of the present invention; as figure 1 As shown, this embodiment provides a hydraulic drive system for a railway crane, including: a hydraulic pump set 1 and a control circuit 2, the control circuit 2 has a first pressure output port 21 and a second pressure output port 22 for providing working pressure; Comprising a variable hydraulic motor 3, the variable hydraulic motor has a first input 31, a second input 32 and a torque output 33 that drives the axle of the railway crane to rotate; the first input 31 and the second input 32 are respectively connected to the first pressure The output end 21 is connected to the second pressure output end 22 for adjusting the rotation speed output by the torque output end 33 according to the above working pressure.
[0010] Specifically, the hydraulic pump group 21 can pressurize the oil in the oil tank and deliver it to the cont...
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The present invention provides a railway crane hydraulic drive system, which comprises a hydraulic pump group and a control circuit, wherein the control circuit comprises a first pressure output terminal for supplying a working pressure and a second pressure output terminal for supplying a working pressure, and further comprises a variable displacement hydraulic motor, the variable displacement hydraulic motor has a first input terminal, a second input terminal and a torque output terminal for driving the axle of a railway crane to rotate, the first input terminal and the second input terminal are respectively connected with the first pressure output terminal and the second pressure output terminal and are provided for adjusting the rotation speed output by the torque output terminal according to the working pressure. According to the railway crane hydraulic drive system, the variable displacement hydraulic motor is adopted so as to automatically adjust the lifting operation speed according to the current load situation, such that switching between two working conditions such as high speed railway crane walking and lifting self-power walking can be achieved, the railway crane manufacturing cost is reduced, the hydraulic system maintenance is convenient, the maintenance cost is reduced.
Description
technical field [0001] The invention relates to the manufacturing technology of hoisting equipment, in particular to a driving control system of a railway crane. Background technique [0002] The railway crane can be divided into high-speed walking state and hoisting independent walking state according to the operation process. The high-speed walking state is to meet the long-distance transfer requirements of the railway crane from the parking place to the working place, and the moving speed is faster; The self-propelled walking state requires its boom to lift heavy objects and move slowly; that is, the railway crane needs to realize high-speed travel when it is light-loaded, and low-speed travel when it is heavy-loaded. [0003] In the prior art, the hydraulic drive system of the railway crane can provide working pressure for the boom and provide power for walking; however, the power provided for walking is constant, and it is necessary to achieve high speed through the mul...
Claims
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IPC IPC(8): B66C23/62B66C23/50F15B11/04F15B15/08
Inventor 王红兵张靖包晓昆
Owner CNR LANZHOU LOCOMOTIVE