A hydraulic power system for double wheel milling
A hydraulic power system, double-wheel milling technology, applied in the direction of fluid pressure actuating device, servo motor, servo motor assembly, etc., can solve the problems of large heat generation, hidden danger, energy loss of hydraulic pump, etc.
Active Publication Date: 2016-06-22
SHANGHAI ELECTRICAL HYDRAULICS & PNEUMATICS
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Problems solved by technology
However, during the whole process, since the speed of the motor remains unchanged, the hydraulic pump will lose a lot of energy and generate a large amount of heat, which will cause certain hidden dangers.
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[0018] The double-wheel milling hydraulic power system 1 of the present invention is as figure 1 As shown, it includes an oil tank 1, the first and second oil supply circuits for supplying oil to the first and second hydraulic motors 2 and 3 of the double-wheel milling and drilling machine respectively, wherein:
[0019] The first oil supply circuit includes the first oil suction filter 41, the first double piston pump with the first and second variable displacement pumps 51, 52 and the first quantitative pump 61, the first electromagnetic reversing valve Y21, the first cooling 71, the first oil return filter 81, the second oil return filter 82, the input end of the first oil suction filter 41 is connected with the oil tank 1, the output end of the first oil suction filter 41 is divided into two paths, and one path is respectively connected to The first and second variable displacement pumps 51 and 52 of the first double-connected plunger pump are then merged to the first hydr...
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The invention discloses a hydraulic power system of a double-wheel mill. The hydraulic power system of the double-wheel mill comprises an oil tank, a first oil supply loop and a second oil supply loop, wherein the first oil supply loop and the second oil supply loop supply oil to a first hydraulic motor and a second hydraulic motor of a drilling machine of the double-wheel mill respectively. The two oil supply loops adopt variable pumps respectively, the opening tilt angle of a variable valve is controlled through continuous output of a metering pump via a magnetic exchange valve, so that the flow of the variable valve is controlled. When the magnetic exchange valve loses power, the metering pump supplies oil to control ports of the variable pumps directly, so that the tilt angle of the variable pumps is the maximum, and full-flow output of the variable pumps is achieved. When loads increase, system flow decreases continuously, a flow sensor in the system will inform a control system, then the magnetic exchange valve is powered on, oil is stopped from being supplied to the control ports of the variable pumps, then the variable pumps are closed, oil output by the metering pump wholly passes through a second filter and returns to the oil tank, and accordingly a large heating value caused when the loads increase can be avoided, and hidden danger is completely eradiated.
Description
technical field [0001] The invention belongs to a hydraulic power station, in particular to a double-wheel milling hydraulic power system. Background technique [0002] At present, when the common double-wheel milling hydraulic power system is started, the hydraulic pump outputs hydraulic oil to drive the motor and the load. At the beginning, the load is small, and the output flow of the hydraulic pump is large. When the double-wheel milling works for a period of time, the load will increase. , will reduce the output flow of the hydraulic pump. However, during the whole process, since the rotational speed of the motor remains unchanged, a large amount of energy of the hydraulic pump will be lost, and a large amount of heat will be generated, which will cause certain hidden dangers. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a double-wheel milling hydraulic power system, which can automatically cut off the o...
Claims
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IPC IPC(8): F15B11/17F15B13/06
Inventor 安彩凤范良俊
Owner SHANGHAI ELECTRICAL HYDRAULICS & PNEUMATICS