CN-224225142-U - Full-hydraulic working and steering system of underground medium-sized ore transportation truck

Abstract

The utility model relates to the technical field of underground trackless equipment hydraulic systems, in particular to a full-hydraulic working and steering system of an underground medium-sized mining truck, which comprises a hydraulic oil tank, an oil absorption filter, an oil pump, a flow amplifier, a steering device, a steering cylinder, a main valve, a pilot oil supply valve, a pilot control valve, a lifting cylinder, an oil return valve block, an oil return filter and the hydraulic oil tank, wherein the hydraulic oil tank is connected with the oil pump through the oil absorption filter, hydraulic oil of the oil pump flows through an HP port of the flow amplifier and sequentially flows into a P port of the steering device and a P port of the pilot oil supply valve through a P port of the flow amplifier.

Inventors

• ZHANG SHICHAO
• ZHANG ZHIHUAN
• JIA WENHONG
• ZHOU BANGRONG
• MA BINWEN

Assignees

• 金川集团机械制造有限公司
• 金川集团股份有限公司

Dates

Publication Date

20260512

Application Date

20250625

Claims (3)

1. 1. A full-hydraulic working and steering system of a medium-sized underground mining truck is characterized by comprising a hydraulic oil tank (11), an oil pump (2), a flow amplifier (3), a steering device (4), a steering cylinder (5), a main control valve (6), a pilot oil supply valve (7), a pilot control valve (8), a lifting cylinder (12) and an oil return valve block (9), wherein the hydraulic oil tank (11) is connected with the oil pump (2), hydraulic oil output by the oil pump (2) flows through an HP port of the flow amplifier (3) and sequentially flows into the P port of the steering device (4) and the P port of the pilot oil supply valve (7) through the P port of the flow amplifier (3), an EF port of the flow amplifier (3) flows hydraulic oil into the P port of the main control valve (6), the L, R and LS ports of the steering device (4) are matched with L, R and LS ports of the flow amplifier (3) to control the steering of the steering cylinder (5), the hydraulic oil at the PV port flows into the control valve (8) through the P port of the flow amplifier (3), and the pilot oil supply valve (7) flows into the P port of the steering valve (6), the steering valve (6) is realized through the main control valve (6), the steering valve (7) is controlled by the pilot oil supply valve (5) The return oil of the pilot control valve (8) flows back to the hydraulic oil tank (11) through the return oil valve block (9).
2. 2. The working and steering system according to claim 1, wherein the hydraulic oil tank (11) is connected with an oil suction filter (1), and the hydraulic oil tank (11) is connected with the oil pump (2) through the oil suction filter (1).
3. 3. The working and steering system according to claim 1, wherein the liquid outlet of the oil return valve block (9) is connected with an oil return filter (10), and oil returns of the flow amplifier (3), the steering gear (4), the main control valve (6), the pilot oil supply valve (7) and the pilot control valve (8) all flow back to the hydraulic oil tank (11) through the oil return valve block (9) via the oil return filter (10).

Description

Full-hydraulic working and steering system of underground medium-sized ore transportation truck Technical Field The utility model relates to the technical field of underground trackless equipment hydraulic systems, in particular to a full-hydraulic working and steering system of an underground medium-sized ore transportation truck. Background The underground railway transportation special vehicle is suitable for roadway space limitation, and adopts compact design, including types such as trucks, personal vehicles and skip cars. The mine car is used as a narrow-gauge transportation carrier of bulk materials (coal, ore, waste stone and the like) and is required to be pulled by a locomotive or a winch, and is divided into five types according to a structure and an unloading mode, namely a fixed type (material and flat car), a tipping bucket type, a single-side curved track side unloading type, a bottom (side) unloading type and a shuttle type mine car, so that a systematic equipment system is formed. The working and steering system of the underground trackless equipment is used as the most key link in the running or steering process of the equipment, and the performance quality of the system is directly related to the overall running efficiency and the safety of the equipment. However, the traditional working and steering system has the defects of overhigh pressure and complicated pipeline layout, so that the maintenance difficulty of the system is increased, and the troubleshooting difficulty is caused when the system fails, so that the steering performance is greatly reduced, and the safety of the whole vehicle is seriously threatened. Disclosure of utility model The utility model aims to provide a full-hydraulic working and steering system of a underground medium-sized ore transportation truck, which is used for solving the problems of overhigh pressure and complicated pipeline layout commonly existing in the traditional working and steering system, thereby not only increasing the maintenance difficulty, but also causing the investigation difficulty during the fault, further greatly reducing the steering performance and seriously threatening the safety of the whole truck. The hydraulic oil tank is connected with the oil pump, hydraulic oil output by the oil pump flows through an HP port of the flow amplifier and sequentially flows into a P port of the steering device and a P port of the pilot oil supply valve through a P port of the flow amplifier, an EF port of the flow amplifier flows hydraulic oil into the P port of the main control valve, L, R and LS ports of the steering device are matched with L, R and LS ports of the flow amplifier to control steering of the steering cylinder, hydraulic oil of the PV port flows into the pilot control valve through a reversing mechanism of the main control valve to realize lifting or descending of the lifting cylinder, and oil return of the flow amplifier, the steering device, the main control valve, the pilot oil supply valve and the oil return valve flows back to the oil tank through the reversing mechanism of the main control valve. Further, the hydraulic oil tank is connected with an oil suction filter, and the hydraulic oil tank is connected with an oil pump through the oil suction filter. Further, a liquid outlet of the oil return valve block is connected with an oil return filter, and oil returns of the flow amplifier, the steering gear, the main control valve, the pilot oil supply valve and the pilot control valve all flow back to the hydraulic oil tank through the oil return valve block and the oil return filter. Compared with the prior art, the utility model has the following beneficial effects: 1. The working and steering system solves the problems of overhigh pressure, complex pipeline layout and the like of the traditional underground trackless equipment in the working and steering process, adopts the HP port and the EF port of the flow amplifier to cooperatively distribute hydraulic oil, avoids the component overload problem caused by overhigh pressure of the system, simultaneously realizes accurate reversing while reducing the operating force through a low-pressure pilot control mechanism of a pilot oil supply valve and a pilot control valve, and fundamentally improves the reliability of steering performance. 2. The oil return valve block is integrated with the oil return path of each part on the pipeline layout, and the oil suction filter and the oil return filter are matched for double filtration design, so that the pipeline connection is simplified, the complicated layout is reduced, the service life of the hydraulic element is prolonged through oil circulating filtration, and the maintenance frequency is reduced. Drawings Fig. 1 is a schematic diagram of the working principle of the full hydraulic working and steering system of the underground medium-sized mining truck. The hydraulic oil pump is characterized by comprising an oil suction filter 1, a