CN111469825A - Full-hydraulic braking efficiency sequential distribution system of mining rubber-tyred vehicle - Google Patents

Full-hydraulic braking efficiency sequential distribution system of mining rubber-tyred vehicle Download PDF

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Publication number
CN111469825A
CN111469825A CN202010264483.1A CN202010264483A CN111469825A CN 111469825 A CN111469825 A CN 111469825A CN 202010264483 A CN202010264483 A CN 202010264483A CN 111469825 A CN111469825 A CN 111469825A
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China
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valve
brake
hydraulic control
port
outlet
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CN202010264483.1A
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CN111469825B (en
Inventor
韦建龙
马艳卫
赵远
刘德宁
郭培燕
郝志军
祁宏
王庆祥
赵瑞萍
任肖利
范江鹏
陈立东
樊瑞龙
仇博
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Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
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Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
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Publication of CN111469825A publication Critical patent/CN111469825A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The invention belongs to the technical field of control of a brake system of a special vehicle in a coal mine, and particularly relates to a full-hydraulic braking efficiency sequential distribution system of a rubber-tyred vehicle for a mine. Oil inlet of brake energy accumulator, oil inlet of stop valve and P of service brake valve1Mouth and P2The port is respectively connected with a hydraulic oil source, an oil return port T of the traveling crane brake valve and an oil outlet of the stop valve are jointly connected with an oil inlet of an oil return filter, and a working port A of the traveling crane brake valve1Is connected with a port P of a braking sequence electromagnetic valve II of the rear axle, and a working port A of a service brake valve2The brake sequence electromagnetic valve I and the brake sequence electromagnetic valve II are respectively connected with a front brake and a rear axle brake through an internal oil duct to enable a service brake valve working port A to be connected with a port P of the brake sequence electromagnetic valve I of a front axle1And A2The brake pressure of (A) is led to P of a brake pressure replica valve1And P2And (4) a mouth. The invention eliminates the hydraulic lag phenomenon of the original vehicle braking system and improves the use safety of the vehicleAnd (4) sex.

Description

Full-hydraulic braking efficiency sequential distribution system of mining rubber-tyred vehicle
Technical Field
The invention belongs to the technical field of control of a brake system of a special vehicle in a coal mine, and particularly relates to a full-hydraulic braking efficiency sequential distribution system of a rubber-tyred vehicle for a mine.
Background
The mining explosion-proof trackless rubber-tyred vehicle is mainly used for transporting underground personnel and materials of a large coal mine, replaces the original transportation mode of the coal mine mainly by a locomotive and a track, and provides a high-efficiency, quick and multi-degree-of-freedom quick auxiliary transportation mode for the coal mine. The overall dimension of the coal mine transport vehicle is large due to the transport conditions of high bearing capacity, large tonnage and the like, the length of the vehicle is generally more than 8 meters, a cab is arranged at the position of a vehicle head, a traveling brake is respectively arranged on a front drive axle and a rear drive axle, a front axle is arranged below the cab, a rear axle is arranged at the rear end of a chassis, a traveling brake valve is arranged in the cab, the dual-loop output of the traveling brake valve respectively controls the front traveling brake and the rear traveling brake, the front brake system and the rear brake system are mutually independent and work is not interfered with each other.
Due to the harsh environment of the underground coal mine, the operating conditions of steep slopes, more bends and slippery roads, the running speed of the vehicle needs to be controlled by frequently braking in the running process. When the vehicle brakes, the service brake valve supplies high-pressure brake oil to the front brake and the rear brake simultaneously, and the two paths of high-pressure brake oil reach the front brake and the rear brake respectively along the brake pipelines to provide brake energy for the brake piston to brake. Because the distances between the front brake and the rear brake and the brake valve pipeline are unequal, the brake pressure in the front brake and the brake pressure in the rear brake are not synchronous, the time difference exists when the brakes are applied, only the front axle brake is used for braking independently at the initial stage of vehicle braking, the rear axle brake is used for braking after lagging the front axle brake, the abrasion of the front axle brake is aggravated in the using process, the braking force is obviously reduced, even the braking function is lost, the rear axle brake is used for independently providing the braking torque of the whole vehicle when the braking effect of the front axle is rapidly reduced or lost, finally, the front brake and the rear brake are damaged due to overuse, the braking function of the whole vehicle is lost, the probability of safety accidents is increased.
In order to solve the problems, the arrangement mode of a vehicle cab cannot be changed due to operation and driving requirements, and the current common method is to increase the pipeline drift diameter of a rear axle brake, shorten the building time of the brake pressure of a rear brake to compensate the difference of the brake distance, and finally enable a front brake and a rear brake to build the brake pressure synchronously. From the current use condition, although increasing the pipeline drift diameter can reduce the on-way resistance of oil, the pipeline volume of the rear braking system is increased, and the brake pressure establishing time is also increased, therefore, the phenomenon of frequent damage of the brake is not fundamentally improved.
Disclosure of Invention
The invention aims to solve the problems and provides a full-hydraulic braking efficiency sequential distribution system for a mining rubber-tyred vehicle.
The invention adopts the following technical scheme: a full-hydraulic braking efficiency sequence distribution system of a mining rubber-tyred vehicle comprises a service brake valve fixed at the front end of a cab of the whole vehicle, a braking energy accumulator and a hydraulic oil tank which are installed and fixed at the rear end of the cab, a front axle brake which is installed and fixed below the cab, a rear axle brake which is fixed at the rear end of a rear frame, a braking sequence electromagnetic valve I and a braking sequence electromagnetic valve II which are respectively fixed on a front axle and a rear axle, an oil inlet of the braking energy accumulator, an oil inlet of a stop valve and a P of the service brake valve1Mouth and P2The ports are respectively connected with a hydraulic oil source, an oil return port T of the traveling crane brake valve and an oil outlet of the stop valve are jointly connected with an oil inlet of an oil return filter, the oil outlet of the oil return filter is connected back to a hydraulic oil tank to introduce return oil into the hydraulic oil tank, and a working port A of the traveling crane brake valve1Is connected with a port P of a braking sequence electromagnetic valve II of the rear axle, and a working port A of a service brake valve2The brake sequence electromagnetic valve I and the brake sequence electromagnetic valve II are respectively connected with a front brake and a rear axle brake through an internal oil duct to enable a service brake valve working port A to be connected with a port P of the brake sequence electromagnetic valve I of a front axle1And A2The brake pressure of (A) is led to P of a brake pressure replica valve1And P2The pressure is led to a hydraulic control port of the pressure copying valve as pilot pressure, an outlet A of the pressure copying valve is connected with a pressure sensor, the pressure sensor converts detected pressure signals into electric signals and outputs the electric signals to a controller, and the controller is connected with electromagnets of a braking sequence electromagnetic valve I and a braking sequence electromagnetic valve II respectively.
The pressure duplicating valve comprises a valve body, a valve core, a load inductor, a return spring and a hydraulic control cavity K1And a hydraulic control chamber K2The valve body is provided with P1Mouth, P2A port A connected with the pressure sensor, and two sides of the valve body are provided with a hydraulic control cavity K for controlling the reversing of the main valve core1And a hydraulic control chamber K2A valve core is arranged in a cavity in the valve body, return springs are arranged at two ends of the valve core, and the cavities at two ends of the valve core are respectively communicated with the hydraulic control cavity K1And a hydraulic control chamber K2The connection is carried out,the valve core comprises a valve block I and a valve block II which are arranged at two ends, and a valve block III which is arranged in the middle, a cavity A is formed between the valve block I and the valve block III, a cavity B is formed between the valve block II and the valve block III, and the cavity A and the cavity P1The ports are communicated, and the cavities B and P are2The ports are communicated, a hydraulic control oil passage A, a hydraulic control oil passage B and a hydraulic control oil passage C are arranged on the valve body, and one end of the hydraulic control oil passage A is communicated with P1Mouth, P2The other end of the port A is provided with an outlet a and an outlet B which are communicated with a cavity in the valve body, and one end of a hydraulic control oil passage B is communicated with a valve P1Mouth, P2The other end of the port A is provided with an outlet a and an outlet b which are connected with a cavity in the valve body, the two ends of a hydraulic control oil duct C are communicated with the cavity in the valve body, and a load inductor is arranged in the hydraulic control oil duct C; when the valve core is in the middle position, P1The port is communicated with the cavity A, P2The port is communicated with the cavity B, the inner end of the port A is blocked by a valve block III, and an outlet a of the hydraulic control oil passage A and a hydraulic control cavity K1The outlet B of the hydraulic control oil passage A is blocked by the valve block I, and the outlet a of the hydraulic control oil passage B and the hydraulic control cavity K are communicated21The outlet B of the hydraulic control oil passage B is blocked by a valve block II, and the two ends of the hydraulic control oil passage C are respectively blocked by the valve block I and the valve block II; when the valve core is in the left position, P1The port is blocked by a valve block III, the port A is communicated with a cavity B, and P is2The port is blocked by a valve block II, the cavity A is communicated with an outlet B of a hydraulic control oil duct A, the outlet a of the hydraulic control oil duct A is blocked by the valve block I, and an outlet a and an outlet B of the hydraulic control oil duct B and a hydraulic control cavity K2Communicating; when the valve core is at the right position, P1The port is blocked by a valve block I, the port A is communicated with a cavity A, and P is2The port is blocked by a valve block III, the cavity B is communicated with an outlet B of a hydraulic control oil duct B, an outlet a of the hydraulic control oil duct B is blocked by a valve block II, and an outlet a and an outlet B of the hydraulic control oil duct A and a hydraulic control cavity K1And (4) communicating.
Compared with the prior art, the explosion-proof diesel engine trackless rubber-tyred vehicle adopting the braking efficiency sequence distribution device eliminates the phenomenon of hydraulic hysteresis of the original vehicle braking system, ensures that the front brake and the rear brake synchronously establish braking pressure, improves the difference of the braking effects of the front brake and the rear brake, avoids the possible accidental collision and damage caused by poor braking effect or loss of braking function in the driving process of the whole vehicle, improves the use safety of the vehicle and reduces the maintenance cost of the vehicle. The invention automatically controls the opening or closing of the electromagnetic valve of the braking sequence by receiving the electric signal instruction of the pressure of the front and rear axle braking systems sensed by the pressure sensor through the system controller, further controls the on-off of high-pressure braking oil in a piston cavity of the vehicle brake, finally realizes the synchronous establishment of the braking pressure of the front and rear brakes, achieves the consistent response of the braking efficiency of the front and rear brakes, eliminates the hydraulic hysteresis of the original vehicle braking system by utilizing the high-speed response of the electric signal, improves the use safety of the vehicle and reduces the maintenance cost of the vehicle.
Drawings
FIG. 1 is a brake performance sequencing arrangement according to the present invention;
FIG. 2 is a layout diagram of the linkage of the present invention with a vehicle;
FIG. 3 is a cross-sectional view of a pressure reproducing valve according to the present invention;
1-service brake valve, 2-rear axle brake, 3-front axle brake, 4-brake sequence solenoid valve, 5-hydraulic oil tank, 6-oil return filter, 7-stop valve, 8-brake accumulator, 9-cab, 10-rear frame, 11-controller, 12-pressure sensor, 13-brake pressure duplication valve, 13.1-valve body, 13.2-valve core, 13.3-return spring, 13.4-load inductor, 13.5-hydraulic control cavity K113.6-Hydraulic control Chamber K213.7-hydraulic control oil passage A, 13.8-hydraulic control oil passage B, 13.9-hydraulic control oil passage C, 13.10-valve block I, 13.11-valve block II, 13.12-valve block III.
Detailed Description
The present invention will be described in detail with reference to the following drawings.
As shown in fig. 2, the system for sequentially distributing the full hydraulic braking efficiency of the mining rubber-tyred vehicle comprises a service brake valve 1 fixed at the front end of a cab 9 of the whole vehicle, a braking energy accumulator 8 and a hydraulic oil tank 5 which are installed and fixed at the rear end of the cab 9, a front axle brake 3 which is installed and fixed below the cab 9, a rear axle brake 2 which is fixed at the rear end of a rear frame 10, and a braking sequence electromagnetic valve i 4.1 and a braking sequence electromagnetic valve ii 4.2 which are respectively fixed on a front axle and a rear axle.
As shown in fig. 3, the structure of the pressure copying valve 13 is shown, and the pressure copying valve 13 includes a valve body 13.1, a valve core 13.2, and a load sensor 13.4. Return spring 13.3, hydraulic control chamber K113.5 and fluid control Chamber K213.6, the valve body 13.1 is provided with P1Mouth, P2A port A connected with the pressure sensor, and hydraulic control cavities K for controlling the reversing of the main valve core are arranged at two sides of the valve body 13.1113.5 and fluid control Chamber K213.6, a valve core 13.2 is arranged in the cavity in the valve body 13.1, two ends of the valve core 13.2 are provided with return springs 13.3, and the cavities at two ends of the valve core 13.2 are respectively connected with a hydraulic control cavity K113.5 and fluid control Chamber K213.6, the valve core 13.2 comprises a valve block I13.10 and a valve block II 13.11 which are arranged at two ends and a valve block III 13.12 arranged in the middle, a cavity A is formed between the valve block I13.10 and the valve block III 13.12, a cavity B is formed between the valve block II 13.11 and the valve block III 13.12, and the cavity A and the cavity P are respectively communicated1The ports are communicated, and the cavities B and P are2The ports are communicated, a hydraulic control oil passage A13.7, a hydraulic control oil passage B13.8 and a hydraulic control oil passage C13.9 are arranged on the valve body 13.1, and one end of the hydraulic control oil passage A13.7 is communicated with P1Mouth, P2The other end of the port A is provided with an outlet a and an outlet B which are communicated with a cavity in the valve body 13.1, and one end of a hydraulic control oil passage B13.8 is communicated with a valve P1Mouth, P2The other end of the port A is provided with an outlet a and an outlet b which are communicated with a cavity in the valve body 13.1, two ends of a hydraulic control oil duct C13.9 are communicated with the cavity in the valve body 13.1, and a load inductor 13.4 is arranged in the hydraulic control oil duct C13.9; when the valve core 13.1 is at the middle position, P1The port is communicated with the cavity A, P2The port is communicated with the cavity B, the inner end of the port A is blocked by a valve block III 13.12, and an outlet a of a hydraulic control oil passage A13.7 and a hydraulic control cavity K113.5, the outlet B of the hydraulic control oil passage A13.7 is blocked by a valve block I13.10, and the outlet a of the hydraulic control oil passage B13.8 and a hydraulic control cavity K are communicated2113.6, the outlet B of the hydraulic control oil passage B13.8 is blocked by a valve block II 13.11, and two ends of the hydraulic control oil passage C13.9 are respectively blocked by a valve block I13.10 and a valve block II 13.11; when the valve core 13.2 is in the left position, P1The port is blocked by a valve block III 13.12, the port A is communicated with the cavity B, and the port P is2The port is blocked by a valve block II 13.11, the cavity A is communicated with an outlet B of a hydraulic control oil passage A13.7, an outlet a of the hydraulic control oil passage A13.7 is blocked by a valve block I13.10, and an outlet a and an outlet B of a hydraulic control oil passage B13.8 are blocked with a hydraulic control cavity K2Communicating; when the valve core 13.2 is at the right position, P1The port is blocked by a valve block I13.10, the port A is communicated with the cavity A,P2the port is blocked by a valve block III 13.12, the cavity B is communicated with an outlet B of a hydraulic control oil passage B13.8, an outlet a of the hydraulic control oil passage B13.8 is blocked by a valve block II 13.11, and an outlet a and an outlet B of the hydraulic control oil passage A13.7 and a hydraulic control cavity K1And (4) communicating.
P1、P2The port is respectively connected with a front brake sequence valve and a rear brake sequence valve 4, the port A is connected with a pressure sensor, K1、K2The hydraulic control cavity controls the main valve core to change direction. When P is present1、P2When the port has no pressure oil, the valve core is in the middle position under the action of the return spring, and the port A and the port P are1、P2The port is disconnected; when P is present1When pressure oil is in the mouth, the oil passes through the oil passage P1The internal oil passage connected with the port oil passage leads the pressure oil to the hydraulic control cavity K2Under the action of high pressure, the main valve core moves leftwards and reverses, P2Oral A is connected, P2The port pressure oil passes through the port A to the sensor; when P is present2When pressure oil is in the mouth, the oil passes through the oil passage P2The internal oil passage connected with the port oil passage leads the pressure oil to the hydraulic control cavity K1Under the action of high pressure, the main valve core moves rightwards and reverses, P1Oral A is connected, P1Port pressure oil is passed through port a to the sensor.
As shown in fig. 1, the brake accumulator 8 oil inlet, the stop valve 7 oil inlet and the P of the service brake valve 11Mouth and P2The ports are respectively connected with a hydraulic oil source, an oil return port T of the traveling crane brake valve 1 and an oil outlet of a stop valve 7 are jointly connected with an oil inlet of an oil return filter 6, the oil outlet of the oil return filter 6 is connected back to a hydraulic oil tank 5 to introduce return oil into the hydraulic oil tank 5, and a working port A of the traveling crane brake valve 11Is connected with a P port of a braking sequence electromagnetic valve II 4.2 of a rear axle, and a working port A of a service brake valve 12The brake sequence electromagnetic valve I4.1 and the brake sequence electromagnetic valve II 4.2 are respectively connected with a front brake 3 and a rear axle brake 2 through an internal oil duct1And A2P of the brake pressure introduction valve 131And P2A port, which is led as a pilot pressure to a pilot port of a pressure copying valve 13, the pressure copying valve 13 export A connects with pressure sensor 12, and pressure sensor exports controller 11 after changing the pressure signal that detects into the signal of telecommunication, and controller 11 is connected with the electro-magnet of braking order solenoid valve I4.1 and braking order solenoid valve II 4.2 respectively. The stop valve 7 is mainly used for relieving pressure of the brake energy accumulator, and when the vehicle is normally used, the stop valve is in a closed state.
When the explosion-proof trackless rubber-tyred vehicle normally runs, a driver does not operate the driving brake valve 1, the driving brake valve 1 is in a non-working state, and P is1、P2The brake fluid is cut off at the working port A1、A2The front brake piston cavity and the rear brake piston cavity are communicated with a T port of an oil return port, oil in the front brake piston cavity and the rear brake piston cavity is connected with a port 4A of a brake sequence electromagnetic valve and communicated with a hydraulic oil tank through the T port, the pressure of the brake piston cavities is relieved, and the whole front brake and the rear brake are in a brake release state and normally travel.
When the explosion-proof trackless rubber-tyred vehicle brakes, high-pressure oil in the brake accumulator 8 and high-pressure oil of the hydraulic oil source reach a high-pressure brake oil port P of the service brake valve 1 through a pipeline1、P2When the driver steps on the pedal of the service brake valve 1, the high-pressure brake oil port P of the service brake valve 11、P2The ports are respectively connected with the working oil port A1、A2The brake high pressure oil passes through the working oil port A1、A2Respectively led to the front and the rear braking sequence solenoid valves 4P, and the working port A of the braking valve is connected with the internal oil duct solenoid valve 41、A2P of the brake pressure introduction valve 131、P2At the same time, this pressure is introduced as a pilot pressure to a pilot port of the pressure copying valve 13, and the original vehicle brake system hydraulic pressure is delayed, so that P of the pressure copying valve 13 is braked1、P2The mouth pressure is established asynchronously when P1When the port pressure is preferentially established, under the action of the pilot pressure, the valve core of the pressure copying valve moves rightwards, the left position of the copying valve can work, and the pressure copying valve P2The port is communicated with the port A due to P2The port pressure has not been established, at which time the pressure sensor 12 does not detect a pressure signal, the pressure sensor 12 does not output an electrical signal to the controller 11, the controller does not send a control signal to the braking sequence solenoid valve 4, the braking sequenceThe electromagnetic valve 4 does not work, and the whole vehicle is not braked at the moment; up to P2When the port pressure is established, after the pressure sensor 12 detects the pressure output, a command signal is sent to the controller 11, the controller receives the command signal of the pressure sensor and sends a working signal to the braking sequence electromagnetic valve, after the braking sequence electromagnetic valve receives the working signal, the electromagnet acts, the oil duct in the braking sequence electromagnetic valve is communicated, and the high-pressure brake oil enters the front axle brake and the rear axle brake through the braking sequence electromagnetic valve to implement braking. Because the braking sequence electromagnetic valves are arranged on the front and rear axle brakes, high-pressure braking oil can be ensured to enter the front and rear axle brakes simultaneously, and because the volumes of the front and rear brakes are the same, the front and rear axle brakes start to synchronously establish braking pressure, a brake piston pressure plate is extruded, a disc spring is compressed through a piston, so that a dynamic friction plate and a static friction plate in the brake are contacted, braking force is provided, and the front and rear axle brakes synchronously brake.
The present invention is not limited to the above-described embodiments, and technical modifications may be made by those skilled in the relevant art without departing from the scope of the basic technical idea of the invention, and the modifications are intended to fall within the scope of the claims of the present invention.

Claims (2)

1. The utility model provides a mining rubber-tyred car full hydraulic braking efficiency is distribution system in proper order which characterized in that: the brake system comprises a service brake valve (1) fixed at the front end of a cab (9) of the whole vehicle, a brake energy accumulator (8) and a hydraulic oil tank (5) which are fixedly arranged at the rear end of the cab (9), a front axle brake (3) fixedly arranged below the cab (9), a rear axle brake (2) fixed at the rear end of a rear rack (10), a braking sequence electromagnetic valve I (4.1) and a braking sequence electromagnetic valve II (4.2) which are respectively fixed on a front axle and a rear axle, an oil inlet of the brake energy accumulator (8), an oil inlet of a stop valve (7) and P of the service brake valve (1)1Mouth and P2The port is respectively connected with a hydraulic oil source, an oil return port T of the traveling crane brake valve (1) and an oil outlet of the stop valve (7) are jointly connected with an oil inlet of an oil return filter (6), the oil outlet of the oil return filter (6) is connected back to the hydraulic oil tank (5) to introduce return oil into the hydraulic oil tank (5), and a working port A of the traveling crane brake valve (1)1Is connected with a port P of a braking sequence electromagnetic valve II (4.2) of the rear axle, and a working port A of a service brake valve (1)2The brake sequence electromagnetic valve I (4.1) and the brake sequence electromagnetic valve II (4.2) are respectively connected with a front brake (3) and a rear axle brake (2) through an internal oil duct1And A2P of the brake pressure introduction valve (13)1And P2The pressure is led to a hydraulic control port of a pressure copying valve (13) as pilot pressure, an outlet A of the pressure copying valve (13) is connected with a pressure sensor (12), the pressure sensor converts detected pressure signals into electric signals and outputs the electric signals to a controller (11), and the controller (11) is respectively connected with electromagnets of a braking sequence electromagnetic valve I (4.1) and a braking sequence electromagnetic valve II (4.2).
2. The mining rubber-tyred vehicle full hydraulic braking effectiveness sequential distribution system according to claim 1, characterized in that: the pressure replication valve (13) comprises a valve body (13.1), a valve core (13.2), a load inductor (13.4), a return spring (13.3) and a hydraulic control cavity K1(13.5) and Hydraulic control Chamber K2(13.6), and a valve body (13.1) is provided with P1Mouth, P2A port A connected with the pressure sensor, and hydraulic control cavities K for controlling the reversing of the main valve core are arranged at the two sides of the valve body (13.1)1(13.5) and Hydraulic control Chamber K2(13.6), a valve core (13.2) is arranged in a cavity in the valve body (13.1), two ends of the valve core (13.2) are provided with return springs (13.3), and the cavities at two ends of the valve core (13.2) are respectively connected with the hydraulic control cavity K1(13.5) and Hydraulic control Chamber K2(13.6) are communicated, the valve core (13.2) comprises a valve block I (13.10) and a valve block II (13.11) which are arranged at two ends and a valve block III (13.12) arranged in the middle, a cavity A is formed between the valve block I (13.10) and the valve block III (13.12), a cavity B is formed between the valve block II (13.11) and the valve block III (13.12), and the cavities A and P1The ports are communicated, and the cavities B and P are2The ports are communicated, a hydraulic control oil passage A (13.7), a hydraulic control oil passage B (13.8) and a hydraulic control oil passage C (13.9) are arranged on the valve body (13.1), and one end of the hydraulic control oil passage A (13.7) is communicated with P1Mouth, P2The other end of the port A is provided with an outlet a and an outlet B which are communicated with a cavity in the valve body (13.1), and one end of a hydraulic control oil passage B (13.8) is communicated with a valve P1Mouth, P2The other end of the port A is provided with an outlet a and an outlet b which are communicated with a cavity in the valve body (13.1), two ends of a hydraulic control oil duct C (13.9) are communicated with the cavity in the valve body (13.1), and a load inductor (13.4) is arranged in the hydraulic control oil duct C (13.9); when the valve core (13.1) is at the neutral position, P1The port is communicated with the cavity A, P2The port is communicated with the cavity B, the inner end of the port A is blocked by a valve block III (13.12), and an outlet a of a hydraulic control oil passage A (13.7) and a hydraulic control cavity K1(13.5) is communicated, the outlet B of the hydraulic control oil passage A (13.7) is blocked by the valve block I (13.10), and the outlet a of the hydraulic control oil passage B (13.8) and the hydraulic control cavity K are communicated21(13.6) communication, wherein the outlet B of the hydraulic control oil passage B (13.8) is blocked by a valve block II (13.11), and two ends of the hydraulic control oil passage C (13.9) are respectively blocked by a valve block I (13.10) and a valve block II (13.11); when the valve core (13.2) is at the left position, P1The port is blocked by a valve block III (13.12), the port A is communicated with a cavity B, and the port P is2The port is blocked by a valve block II (13.11), the cavity A is communicated with an outlet B of a hydraulic control oil passage A (13.7), an outlet a of the hydraulic control oil passage A (13.7) is blocked by a valve block I (13.10), and an outlet a and an outlet B of the hydraulic control oil passage B (13.8) and a hydraulic control cavity K2Communicating; when the valve core (13.2) is at the right position, P1The port is blocked by a valve block I (13.10), the port A is communicated with a cavity A, and P is2The port is blocked by a valve block III (13.12), the cavity B is communicated with an outlet B of a hydraulic control oil passage B (13.8), an outlet a of the hydraulic control oil passage B (13.8) is blocked by a valve block II (13.11), and an outlet a and an outlet B of the hydraulic control oil passage A (13.7) and a hydraulic control cavity K1And (4) communicating.
CN202010264483.1A 2020-04-07 2020-04-07 Full-hydraulic braking efficiency sequential distribution system of mining rubber-tyred vehicle Active CN111469825B (en)

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CN202010264483.1A CN111469825B (en) 2020-04-07 2020-04-07 Full-hydraulic braking efficiency sequential distribution system of mining rubber-tyred vehicle

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Application Number Priority Date Filing Date Title
CN202010264483.1A CN111469825B (en) 2020-04-07 2020-04-07 Full-hydraulic braking efficiency sequential distribution system of mining rubber-tyred vehicle

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CN111469825A true CN111469825A (en) 2020-07-31
CN111469825B CN111469825B (en) 2021-07-06

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CN204161337U (en) * 2014-10-17 2015-02-18 金川集团股份有限公司 A kind of hydraulic braking system of Underground Mine truck
CN204641728U (en) * 2015-04-13 2015-09-16 徐工集团工程机械股份有限公司 A kind of mechanical drive articulated truck brake system
CN105691370A (en) * 2014-12-09 2016-06-22 株式会社万都 Electric brake system
CN106122153A (en) * 2016-08-31 2016-11-16 中国煤炭科工集团太原研究院有限公司 A kind of have the load-sensitive proportional multi-way valve that load pressure replicates
CN205801087U (en) * 2016-07-01 2016-12-14 浙江开山重工股份有限公司 A kind of driving drill carriage double circuit hydraulic braking system
CN106476666A (en) * 2016-10-31 2017-03-08 中国煤炭科工集团太原研究院有限公司 Radial type bidirectional driving Self-loading-unloading rubber tire transport trolley
CN109515417A (en) * 2018-11-12 2019-03-26 三汽车起重机械有限公司 Brake fluid system and crane

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738640B1 (en) * 1995-04-20 2001-07-04 DaimlerChrysler AG Compressed air brake system for a commercial vehicle
CN2801571Y (en) * 2005-05-18 2006-08-02 滕冠军 Biloop pressure self balance valve
CN102785652A (en) * 2012-08-17 2012-11-21 徐州徐工铁路装备有限公司 Integrated control system of wheel type engineering machine
CN202764956U (en) * 2012-08-17 2013-03-06 徐州徐工铁路装备有限公司 Wheel type engineering machinery integrated control system
US20140375113A1 (en) * 2013-06-21 2014-12-25 Hitachi Automotive Systems, Ltd. Brake Control Apparatus
CN204161337U (en) * 2014-10-17 2015-02-18 金川集团股份有限公司 A kind of hydraulic braking system of Underground Mine truck
CN105691370A (en) * 2014-12-09 2016-06-22 株式会社万都 Electric brake system
CN204641728U (en) * 2015-04-13 2015-09-16 徐工集团工程机械股份有限公司 A kind of mechanical drive articulated truck brake system
CN205801087U (en) * 2016-07-01 2016-12-14 浙江开山重工股份有限公司 A kind of driving drill carriage double circuit hydraulic braking system
CN106122153A (en) * 2016-08-31 2016-11-16 中国煤炭科工集团太原研究院有限公司 A kind of have the load-sensitive proportional multi-way valve that load pressure replicates
CN106476666A (en) * 2016-10-31 2017-03-08 中国煤炭科工集团太原研究院有限公司 Radial type bidirectional driving Self-loading-unloading rubber tire transport trolley
CN109515417A (en) * 2018-11-12 2019-03-26 三汽车起重机械有限公司 Brake fluid system and crane

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