Liquid-filled valve and mining dumper hydraulic system
A technology of filling valve and hydraulic oil tank, applied in the hydraulic field, can solve the problems of high failure rate and large impact of the lifting system, and achieve the effect of reducing costs and reducing the complexity of the system
Active Publication Date: 2018-09-21
GUANGXI LIUGONG MASCH CO LTD
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Problems solved by technology
[0009] The technical problem to be solved by the present invention is to provide a liquid filling valve and a mining dump truck hydraulic system for the problem of large impact and high failure rate of the lifting system of the constant pressure variable system on the existing mine dump truck. Simple structure, good maneuverability of the steering system, and effective control of the impact at the end of the lifting system stroke
Method used
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Embodiment Construction
[0039] The specific implementation will be described below in conjunction with the accompanying drawings.
[0040] The schematic diagram of the mining dump truck hydraulic system in this embodiment is as follows figure 1 As shown, it includes a hydraulic braking system 17, a hydraulic steering control mechanism and a steering cylinder 10 connected thereto, a hydraulic lift control mechanism and a lifting cylinder 14 connected thereto, a load sensitive pump 2, a quantitative pump 1, an accumulator 7, Hydraulic oil tank 6, filling valve 5, LS pressure control valve 4, second hydraulic control switch valve 3, electromagnetic reversing valve 12, pilot oil source valve 11. Quantitative pump 1 is a gear pump. Both the oil inlet S2 of the quantitative pump 1 and the oil inlet S1 of the load sensing pump 2 are connected to the hydraulic oil tank.
[0041] The hydraulic steering control mechanism includes a flow amplifying valve 9 connected to the steering cylinder 10 and a steering ...
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The invention relates to a mining dumper hydraulic system, and aims at solving the problems that a constant pressure variable system and a lifting system on a traditional mining dumper have large impact and a high failure rate. The mining dumper hydraulic system comprises a liquid-filled valve, an LS pressure control valve, a second liquid control switch valve and an electromagnetic reversing valve. A constant-displacement pump is used for filling liquid into an energy accumulator through the liquid-filled valve and supplying oil to a lifting valve; a load sensitive pump is used for supplyingoil to the steering system and supplying oil to the lifting valve through the second liquid control switch valve during lifting; and when a lifting air cylinder extends to the final position of a lifting stroke, the electromagnetic reversing valve controls the second liquid control switch valve to cut off the load sensitive pump which supplies oil to the lifting valve. The mining dumper hydraulicsystem is simple in structure; the steering system has good controllability; and the impact on the final position of the stroke of the lifting system is effectively controlled.
Description
technical field [0001] The invention relates to a hydraulic technology, more specifically, to a liquid filling valve and a mining dump truck hydraulic system. Background technique [0002] The existing variable hydraulic systems of mining dump trucks generally include load-sensing systems and constant-pressure variable systems. The variable part is generally used for the steering system, while the lifting system is mostly a quantitative system. The lift hydraulic system is often composed of lift pumps, lift valves, balance valves, pilot valves (or electromagnetic handles), multi-stage cylinders and other components. The steering hydraulic system is often composed of steering pumps, steering control units, accumulators, and steering cylinders. and other components. The brake system consists of brake valves, brake calipers, accumulators and other components. At present, the mine cars of most manufacturers adopt the constant pressure variable system. [0003] A typical const...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B11/16F15B1/027F15B13/02
CPCF15B1/027F15B11/165F15B13/02F15B13/027F15B2013/002F15B2211/20576F15B2211/8606
Inventor 杨胜清王素燕李茜唐绪文唐云娟
Owner GUANGXI LIUGONG MASCH CO LTD