阅读说明：本技术 一种基于气动控制的矿用车辆湿式制动器强制冷却系统 (Forced cooling system of wet brake of mining vehicle based on pneumatic control ) 是由 范江鹏 赵瑞萍 仇博 马艳卫 姚志功 谢龙 王庆祥 郭培燕 闫晓刚 田舒 侯尧花 于 2021-06-24 设计创作，主要内容包括：本发明涉及防爆无轨胶轮车运输车装备领域,具体是一种基于气动控制的矿用车辆湿式制动器强制冷却系统。气包的进口和出口形成回路,并在进口管路上设置空气压缩机,该回路与空气压缩机连接,空气压缩机与液控换向阀的P口连接,液控换向阀的控制口与节流阀连接,节流阀与机油泵连接,液控换向阀的A口与防爆电控减压阀的P口连接,防爆电控减压阀的A口与防爆电磁换向阀的P口连接,防爆电磁换向阀的A口和B口分别与双作用气缸的A口和B口连接,双作用气缸的活塞端与液压油箱连接,防爆电控减压阀以及防爆电磁换向阀的控制口与电控处理单元信号连接,电控处理单元由车载电源供电,电控处理单元与设置在湿式制动器上的液压油温度传感器连接。(The invention relates to the field of equipment of transportation vehicles of explosion-proof trackless rubber-tyred vehicles, in particular to a forced cooling system of a wet brake of a mining vehicle based on pneumatic control. The inlet and the outlet of the air bag form a loop, an air compressor is arranged on the inlet pipeline, the loop is connected with the air compressor, the air compressor is connected with a port P of a hydraulic control reversing valve, a control port of the hydraulic control reversing valve is connected with a throttle valve, the throttle valve is connected with an oil pump, a port A of the hydraulic control reversing valve is connected with a port P of an explosion-proof electric control reducing valve, the port A of the explosion-proof electric control reducing valve is connected with the port P of an explosion-proof electromagnetic reversing valve, the port A and the port B of the explosion-proof electromagnetic reversing valve are respectively connected with a port A and a port B of a double-acting cylinder, a piston end of the double-acting cylinder is connected with a hydraulic oil tank, the explosion-proof electric control reducing valve and the control port of the explosion-proof electromagnetic reversing valve are in signal connection with an electric control processing unit, the electric control processing unit is powered by a vehicle-mounted power supply, and the electric control processing unit is connected with a hydraulic oil temperature sensor arranged on a wet brake.)

1. The utility model provides a mining vehicle wet brake forced cooling system based on pneumatic control which characterized in that: comprises an electric control processing unit (22), an air compressor (3), an air bag (2), an air filtering unit (4), a hydraulic control reversing valve (12), an explosion-proof electric control pressure reducing valve (11), a double-acting air cylinder (9), an explosion-proof electric control reversing valve (10), a hydraulic oil tank (17), a wet brake (7) with a circulating oil hole, a hydraulic oil temperature sensor (8) and a vehicle-mounted power supply (21), wherein the inlet and the outlet of the air bag (2) form a loop, the air compressor (3) is arranged on an inlet pipeline and is connected with the air compressor (3), the air compressor (3) is connected with a P port of the hydraulic control reversing valve (12), a control port of the hydraulic control reversing valve (12) is connected with a throttle valve (13), the throttle valve (13) is connected with an oil pump (14), an A port of the hydraulic control reversing valve (12) is connected with the P port of the explosion-proof electric control pressure reducing valve (11), an opening A of the explosion-proof electric control pressure reducing valve (11) is connected with an opening P of the explosion-proof electromagnetic directional valve (10), an opening A and an opening B of the explosion-proof electromagnetic directional valve (10) are respectively connected with an opening A and an opening B of the double-acting cylinder (9), a piston end of the double-acting cylinder (9) is connected with a hydraulic oil tank (17), an oil inlet and return opening at one end of the hydraulic oil tank (17) is connected with the opening P of the wet brake (7), and an oil inlet and return opening at the other end of the hydraulic oil tank (17) is connected with an opening T of the wet brake (7); the control ports of the explosion-proof electric control pressure reducing valve (11) and the explosion-proof electromagnetic directional valve (10) are in signal connection with an electric control processing unit (22), the electric control processing unit (22) is powered by a vehicle-mounted power supply (21), and the electric control processing unit (22) is connected with a hydraulic oil temperature sensor (8) arranged on the wet brake (7).

2. The pneumatic control based mining vehicle wet brake forced cooling system of claim 1, characterized in that: the hydraulic oil tank (17) comprises an oil tank body (17-14) with a hollow cylindrical structure, one end of the oil tank body is welded with a bottom plate (17-3), the other end of the oil tank body is in threaded connection with a cover plate (17-10), a sealing gasket (17-9) is arranged between the cover plate (17-10) and the oil tank body (17-14), the bottom plate (17-3) is provided with an explosion-proof proximity switch interface (17-2) and an explosion-proof proximity switch (23), and the oil tank body is provided with two oil inlet and return ports (17-1) which are respectively connected with P ports of wet brakes (7) on two sides; the cover plate (17-10) is also provided with an explosion-proof proximity switch interface (17-2), the explosion-proof proximity switch interface (17-2) is in threaded connection with an explosion-proof proximity switch (23), and is provided with two oil inlet and return ports (17-1) which are respectively connected with the T ports of the brakes at two sides; the oil tank is characterized in that a plurality of fins 17-14 are welded on the outer surface of the oil tank body (17-14), a piston (17-5) is arranged inside the oil tank body (17-14), the piston (17-5) divides the oil tank into two cavities, a sealing ring (17-13) is arranged on the piston (17-5) in the circumferential direction, a piston rod (17-12) is arranged at the center of the circle center of the piston, the piston rod (17-12) extends to the outside of the hydraulic oil tank (17) through a hole in a cover plate (17-10), and a support ring (17-6), a sealing ring (17-7) and a dust ring (17-8) are arranged between the piston rod (17-12) and the cover plate (17-10).

3. The pneumatic control based mining vehicle wet brake forced cooling system of claim 2, characterized in that: the hydraulic oil tank (17) is connected with the double-acting cylinder (9) through a split pin (19) and a positioning pin (20), and the hydraulic oil tank and the double-acting cylinder are in threaded connection with a cross beam (16) of the mining vehicle through an oil tank mounting bracket (17-11) and a double-acting cylinder bracket (24).

4. The pneumatic control based mining vehicle wet brake forced cooling system of claim 3, characterized in that: the air bag (2) is provided with a safety valve (1) and an inflation valve (15).

5. The pneumatic control based mining vehicle wet brake forced cooling system of claim 4, characterized in that: and a pressure gauge (6) is arranged on a pipeline between the air filtering unit (4) and the hydraulic control reversing valve (12).

6. A mining vehicle wet brake forced cooling system control method based on pneumatic control according to claim 2 or 3 or 4 or 5, characterized by: when the vehicle is started, the air source pushes the double-acting air cylinder to work through the explosion-proof electric control pressure reducing valve and the explosion-proof electric control reversing valve, the flow speed of the hydraulic oil in the system depends on the temperature of the hydraulic oil, and when the temperature of the hydraulic oil is detected to rise by the hydraulic oil temperature sensor, an instruction is sent to the explosion-proof electric control pressure reducing valve through the electric control processing unit to increase the air pressure, so that the purposes of accelerating the flow speed of the hydraulic oil, increasing the heat dissipation frequency of the oil and cooling are achieved; otherwise, reducing the gas pressure and slowing down the working frequency of the system to maintain the hydraulic oil of the brake within a reasonable temperature range; when the vehicle is in a static state and only under an idling working condition, the wet brake does not work, the electronic control processing unit acquires signals through the vehicle rotating speed sensor, and the explosion-proof electronic control pressure reducing valve cuts off a gas passage under the instruction of the electronic control processing unit, so that the system stops working.

Technical Field

The invention relates to the field of equipment of transportation vehicles of explosion-proof trackless rubber-tyred vehicles, in particular to a forced cooling system of a wet brake of a mining vehicle based on pneumatic control.

Background

The explosion-proof trackless rubber-tyred transport vehicle is widely accepted by coal mine users due to the characteristics of maneuverability, flexibility, high efficiency and the like. However, with the continuous increase of the excavation depth of the coal mine, the working road surface under the coal mine generally presents long-distance and large-gradient working conditions, so that the operation environment of the explosion-proof trackless rubber-tyred transport vehicle is expected to be severe. Particularly, when the explosion-proof trackless rubber-tyred transport vehicle continuously descends on a slope under a heavy-load working condition, a driver continuously uses a service brake system to control the vehicle speed, so that the friction plate is heated, the coolant of the vehicle brake is heated to high temperature, the brake friction plate is seriously abraded, the internal seal ring and the framework oil seal are sintered at high temperature, and the like, so that the braking force of the explosion-proof trackless vehicle is weakened, and the vehicle brake system fails in serious conditions, so that safety production accidents in an underground coal mine are caused.

Disclosure of Invention

The invention provides a forced cooling system of a wet brake of a mining vehicle based on pneumatic control, which aims to prolong the service life of the wet brake in an explosion-proof vehicle and improve the applicability and the use safety of the explosion-proof vehicle on a large-gradient road surface.

The invention adopts the following technical scheme: a forced cooling system of a wet brake of a mining vehicle based on pneumatic control comprises an electric control processing unit, an air compressor, an air bag, an air filtering unit, a hydraulic control reversing valve, an explosion-proof electric control pressure reducing valve, a double-acting air cylinder, the explosion-proof electric control reversing valve, a hydraulic oil tank, a wet brake with a circulating oil hole, a hydraulic oil temperature sensor and a vehicle-mounted power supply, wherein the inlet and the outlet of the air bag form a loop, the air compressor is arranged on an inlet pipeline and connected with the air compressor, the air compressor is connected with a P port of the hydraulic control reversing valve, a control port of the hydraulic control reversing valve is connected with a throttle valve, the throttle valve is connected with an oil pump, an A port of the hydraulic control reversing valve is connected with a P port of the explosion-proof electric control pressure reducing valve, the A port of the explosion-proof electric control pressure reducing valve is connected with the P port of an explosion-proof electromagnetic reversing valve, and an A port and a B port of the explosion-proof electromagnetic reversing valve are respectively connected with an A port and a B port of the double-acting air cylinder, the piston end of the double-acting cylinder is connected with a hydraulic oil tank, an oil inlet and return port at one end of the hydraulic oil tank is connected with a P port of the wet brake, and an oil inlet and return port at the other end of the hydraulic oil tank is connected with a T port of the wet brake; the control ports of the explosion-proof electric control pressure reducing valve and the explosion-proof electromagnetic reversing valve are in signal connection with an electric control processing unit, the electric control processing unit is powered by a vehicle-mounted power supply, and the electric control processing unit is connected with a hydraulic oil temperature sensor arranged on the wet brake.

Furthermore, the hydraulic oil tank comprises an oil tank body with a hollow cylindrical structure, wherein a bottom plate is welded at one end of the oil tank body, a cover plate is screwed at the other end of the oil tank body, a sealing gasket is arranged between the cover plate and the oil tank body, an explosion-proof proximity switch interface and an explosion-proof proximity switch are arranged on the bottom plate, and two oil inlet and return ports which are respectively connected with P ports of the wet brakes at two sides are arranged on the bottom plate; the cover plate is also provided with an explosion-proof proximity switch interface, the explosion-proof proximity switch interface is in threaded connection with an explosion-proof proximity switch, and the explosion-proof proximity switch interface is provided with two oil inlet and return ports which are respectively connected with the T ports of the brakes at two sides; the oil tank body outward appearance welding have a plurality of fins, the internal portion of oil tank sets up the piston, the piston divide into two cavitys with the oil tank, the piston circumferencial direction on be provided with the sealing washer, its centre of a circle central point puts and is provided with the piston rod, the piston rod stretches to the hydraulic tank outside through the hole on the apron, is provided with support ring, sealing washer and dust ring between piston rod and the apron.

Furthermore, the hydraulic oil tank is connected with the double-acting cylinder through a cotter pin and a positioning pin, and the hydraulic oil tank and the double-acting cylinder are connected to a cross beam of the mining vehicle in a threaded mode through an oil tank mounting support and a double-acting cylinder support.

Furthermore, a safety valve and an inflation valve are arranged on the air bag.

Furthermore, a pressure gauge is arranged on a pipeline between the air filtering unit and the hydraulic control reversing valve.

A control method of a forced cooling system of a wet brake of a mining vehicle based on pneumatic control comprises the following steps that after the vehicle is started, an air source pushes a double-acting cylinder to work through an explosion-proof electric control pressure reducing valve and an explosion-proof electric control reversing valve, the flow speed of hydraulic oil in the system depends on the temperature of the hydraulic oil, when a hydraulic oil temperature sensor detects that the temperature of the hydraulic oil rises, an instruction is sent to the explosion-proof electric control pressure reducing valve through an electric control processing unit, the air pressure is increased, the purpose of accelerating the flow speed of the hydraulic oil is achieved, the heat dissipation frequency of the hydraulic oil is improved, and the purpose of cooling is achieved; otherwise, reducing the gas pressure and slowing down the working frequency of the system to maintain the hydraulic oil of the brake within a reasonable temperature range; when the vehicle is in a static state and only under an idling working condition, the wet brake does not work, the electronic control processing unit acquires signals through the vehicle rotating speed sensor, and the explosion-proof electronic control pressure reducing valve cuts off a gas passage under the instruction of the electronic control processing unit, so that the system stops working.

Compared with the prior art, the invention adopts a pneumatic control mode to realize the forced circulation cooling of the brake cooling liquid and realize the cooling of the brake. By adopting the scheme of the invention, the temperature of the brake of the explosion-proof vehicle can be effectively controlled within a reasonable temperature range without additionally arranging a hydraulic pump or a pneumatic pump, the system adopts a pneumatic control mode, ensures the minimum pressure environment of hydraulic cooling oil in the wet brake, effectively protects the service life of the floating oil seal of the wet brake, and greatly improves the applicability of the explosion-proof trackless rubber-tyred transport vehicle to various coal mines.

Drawings

FIG. 1 is a system schematic of the present invention;

FIG. 2 is a schematic view of a hydraulic tank, double acting cylinder installation of the present invention; .

FIG. 3 is a schematic view of the external structure of the hydraulic oil tank of the present invention;

FIG. 4 is a schematic view of the internal structure of the hydraulic oil tank of the present invention;

fig. 5 is a schematic end view of the oil pipe of the wet brake of the present invention.

In the figure, 1, a safety valve, 2, an air bag, 3, an air compressor, 4, an air filtering unit, 5, a main valve, 6, a barometer, 7, a wet brake, 8, a temperature sensor, 9, a double-acting cylinder, 10, an explosion-proof electromagnetic reversing valve, 11, an explosion-proof electric control pressure reducing valve, 12, a hydraulic control reversing valve, 13, a throttle valve, 14, an oil pump, 15, an inflation valve, 16, a beam, 17, a hydraulic oil tank, 17-1, an oil inlet and return port, 17-2, an explosion-proof proximity switch interface, 17-3, a bottom plate, 17-4, a radiating fin, 17-5, a piston, 17-6, a support ring, 17-7, a sealing ring, 17-8, a dust ring, 17-9, a sealing gasket, 17-10, a cover plate, 17-11, an oil tank mounting bracket, 17-12, a piston rod, 17-13, a piston sealing ring, 17-14 oil tank bodies, 18 double-acting air cylinder shapes, 19 cylindrical pins, 20 split pins, 21 vehicle-mounted power supplies, 22 electronic control processing units, 23 explosion-proof proximity switches and 24 double-acting air cylinder supports.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a forced cooling system of a wet brake of a mining vehicle based on pneumatic control, which aims to solve the problems in the prior art, prolong the service life of the brake of the mining explosion-proof trackless rubber-tyred vehicle, improve the general applicability of the vehicle under different coal mine roadway working conditions and improve the use safety performance of the vehicle.

In order to make the above objects, features and advantages of the present invention more comprehensible, only the forced cooling of a certain axle of a vehicle is described in the schematic drawings, and the specific case can be realized by connecting relevant components in parallel according to the number of axles of the vehicle.

As shown in FIG. 1, the invention provides a forced cooling system of a wet brake of a mining vehicle based on pneumatic control, which comprises an electronic control processing unit 22, an air compressor 3, an air bag 2, an air filtering unit 4, a hydraulic control reversing valve 12, an explosion-proof electronic control pressure reducing valve 11, a double-acting air cylinder 9, an explosion-proof electronic control reversing valve 10, a hydraulic oil tank 17, a wet brake 7 with circulating oil holes, a hydraulic oil temperature sensor 8 and a vehicle-mounted power supply 21, wherein a loop is formed at the inlet and the outlet of the air bag 2, the air compressor 3 is arranged on an inlet pipeline and is connected with the air compressor 3, the air compressor 3 is connected with a P port of the hydraulic control reversing valve 12, a control port of the hydraulic control reversing valve 12 is connected with a throttle valve 13, the throttle valve 13 is connected with an oil pump 14, an A port of the hydraulic control reversing valve 12 is connected with the P port of the explosion-proof electronic control pressure reducing valve 11, an A port of the explosion-proof electronic control pressure reducing valve 11 is connected with a P port of an explosion-proof electromagnetic reversing valve 10, the port A and the port B of the explosion-proof electromagnetic directional valve 10 are respectively connected with the port A and the port B of the double-acting cylinder 9, the piston end of the double-acting cylinder 9 is connected with a hydraulic oil tank 17, an oil inlet and return port 17-1 on a bottom plate 17-3 of the hydraulic oil tank 17 is connected with the port P of the wet brake 7, and an oil inlet and return port 17-1 of a cover plate 17-10 of the hydraulic oil tank 17 is connected with the port T of the wet brake 7; the control ports of the explosion-proof electric control pressure reducing valve 11 and the explosion-proof electromagnetic directional valve 10 are in signal connection with an electric control processing unit 22, the electric control processing unit 22 is powered by a vehicle-mounted power supply 21, and the electric control processing unit 22 is connected with a hydraulic oil temperature sensor 8 arranged on the wet brake 7.

The hydraulic oil tank 17 is connected with the double-acting cylinder 9 through a cotter pin 19 and a positioning pin 20, and the hydraulic oil tank and the double-acting cylinder 9 are screwed on the cross beam 16 through an oil tank mounting bracket 17-11 and a double-acting cylinder bracket 24. The cross beam 16 is in threaded connection or riveted with the lower surface of the frame of the explosion-proof trackless rubber-tyred vehicle, and the positions of the cross beam are arranged at the front axle and the rear axle of the vehicle, and the embodiment is described by taking the front axle as an example.

The hydraulic oil tank 17 is cylindrical, one end of the hydraulic oil tank is welded with a bottom plate 17-3, the other end of the hydraulic oil tank is connected with a cover plate 17-10 in a threaded mode, and a sealing gasket 17-9 is arranged between the cover plate 17-10 and the oil tank body 17-14. The bottom plate 17-3 is provided with an explosion-proof proximity switch interface 17-2, is in threaded connection with an explosion-proof proximity switch 23, and is provided with two oil inlet and oil return ports 17-1 which are respectively connected with oil inlets of brakes on two sides. The cover plate 17-10 is also provided with an explosion-proof proximity switch interface 17-2 which is in threaded connection with an explosion-proof proximity switch 23 and is provided with an oil inlet and return port 17-1 which is respectively connected with the oil return ports of the brakes at the two sides. The outer surface of the oil tank body is welded with a plurality of fins 17-14 for increasing the heat dissipation area of the high-temperature hydraulic oil. A piston 17-5 is arranged in the hydraulic oil tank, the oil tank is divided into two cavities, and oil is supplied to brakes on two sides; the piston 17-5 is provided with a sealing ring 17-13 in the circumferential direction, a piston rod 17-12 is arranged at the center of the circle center of the piston, the piston rod extends to the outside of the hydraulic oil tank 17 through a cover plate 17-10, and a support ring 17-6, a sealing ring 17-7 and a dust ring 17-8 are arranged between the piston rod 17-12 and the cover plate 17-10.

The safety valve 1, the air bag 2, the air compressor 3, the air filtering unit 4, the main valve 5, the air pressure gauge 6, the inflation valve 15, the oil pump 14 and the throttle valve 13 are all conventional parts of an explosion-proof trackless vehicle, and redundant description is omitted here. The main gas path of the gas bag 2 enters a port P of a hydraulic control reversing valve 12 through an air filtering unit 4, enters a port P of an explosion-proof electric control pressure reducing valve 11 through a port A of the hydraulic control reversing valve 12, enters a port P of an explosion-proof electric control reversing valve 10 through a port A of the explosion-proof electric control pressure reducing valve 11, and respectively enters a port A and a port B of a double-acting air cylinder 9 through a port A and a port B of the explosion-proof electric control reversing valve 10. The hydraulic oil driven by the double-acting cylinder 11 is respectively connected with the P ports of the brakes on two sides from the oil inlet and return port 17-1 on the same side of the hydraulic oil tank 17, and the oil inlet and return port 17-1 on the other side is connected with the T ports of the brakes on two sides. And the hydraulic oil temperature sensor 8 is arranged on each brake and used for detecting the actual temperature of the hydraulic oil.

The power box 21 supplies power to the electric control processing unit 22, and the electric control processing unit 22 is respectively connected with the explosion-proof electric control pressure reducing valve 11, the explosion-proof electric control reversing valve 10 and the hydraulic oil temperature sensor 8.

The specific operation scheme of the invention is as follows:

the invention has no change to the driving experience of the explosion-proof trackless rubber-tyred vehicle, and whether the system acts depends on whether the vehicle is started or not, namely, depends on the action of the oil pressure of the explosion-proof diesel engine on the hydraulic control reversing valve. When the vehicle is started, the air source pushes the double-acting air cylinder to work through the explosion-proof electric control pressure reducing valve and the explosion-proof electric control reversing valve. The flow rate of the hydraulic oil in the system depends on the temperature of the hydraulic oil, when the temperature of the hydraulic oil is detected to rise by the hydraulic oil temperature sensor, an instruction is sent to the explosion-proof electric control pressure reducing valve through the electric control processing unit to increase the gas pressure, so that the purpose of accelerating the flow rate of the hydraulic oil is achieved, the heat dissipation frequency of the hydraulic oil is improved, and the purpose of cooling is achieved; otherwise, the gas pressure is reduced, the system working frequency is reduced, and the brake hydraulic oil is maintained within a reasonable temperature range.

When the vehicle is in a static stop state and only under an idling working condition, the brake does not work, the electronic control processing unit can acquire signals through the vehicle rotating speed sensor, and the explosion-proof electronic control pressure reducing valve cuts off a gas passage under the instruction of the electronic control processing unit, so that the system stops working.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.