CN202923631U - Hydraulic braking system of mining dump truck - Google Patents

Hydraulic braking system of mining dump truck Download PDF

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Publication number
CN202923631U
CN202923631U CN 201220612010 CN201220612010U CN202923631U CN 202923631 U CN202923631 U CN 202923631U CN 201220612010 CN201220612010 CN 201220612010 CN 201220612010 U CN201220612010 U CN 201220612010U CN 202923631 U CN202923631 U CN 202923631U
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China
Prior art keywords
valve
brake
braking system
energy storage
propons
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Expired - Lifetime
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CN 201220612010
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Chinese (zh)
Inventor
李涛
黄赫
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Guangzhou Electrical Locomotive Co Ltd
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Guangzhou Electrical Locomotive Co Ltd
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Priority to CN 201220612010 priority Critical patent/CN202923631U/en
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Publication of CN202923631U publication Critical patent/CN202923631U/en
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Abstract

The utility model discloses a hydraulic braking system of a mining dump truck. The hydraulic braking system comprises an electronic pedal, a valve driver, an electromagnetic proportional brake valve, a relay valve and a traveling crane braking system, wherein a signal is transmitted to the valve driver by the electronic pedal, the valve driver emits a signal to control the electromagnetic proportional brake valve to work, and the electromagnetic proportional brake valve, the relay valve and the traveling crane braking system are connected in sequence; an input end of the electromagnetic proportional brake valve is connected with an energy accumulator; the traveling crane brake is connected with a supplementary energy accumulator by a two-position two-way electromagnetic valve, the supplementary energy accumulator is connected with the filter by more than two one-way valves, an input end of the filter is connected with a steering pump which is connected with the oil tank. According to the hydraulic braking system, the technical problems that the braking is difficultly realized, the traveling crane braking reliability is low and the braking precision is low can be solved.

Description

The quarry tipper hydraulic brake system
Technical field
The utility model relates to dumping car, particularly the hydraulic brake system in quarry tipper.
Background technology
Existing quarry tipper hydraulic brake system comprises fuel tank, front-rear axle service braking system, electronic pedal, valve actuator, energy storage and pipeline.Electronic pedal is connected with the input end of valve actuator, propons electric-hydraulic proportion brake activation valve, back axle electric-hydraulic proportion brake activation valve are connected with the mouth of valve actuator respectively, propons electric-hydraulic proportion brake activation valve is connected with the propons service braking system, back axle electric-hydraulic proportion brake activation valve is connected with the back axle service braking system, propons electric-hydraulic proportion brake activation valve is braked by propons and is kept valve body to be connected with mailbox, back axle electric-hydraulic proportion brake activation valve is braked by back axle and is kept valve body to be connected with mailbox, and the propons braking keeps valve body and is connected the connection of front braking maintenance valve body.The defective of the hydraulic brake system of this structure is: in case fuel tank, valve actuator, front-rear axle electric-hydraulic proportion brake activation valve lost efficacy, be difficult to realize the purpose of braking, the reliability that makes service brake be is not high, and the precision of braking is low.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of quarry tipper hydraulic brake system.
The technical scheme that solves the problems of the technologies described above is: the quarry tipper hydraulic brake system comprises electronic pedal, valve actuator, solenoid-operated proportional brake activation valve, relay valve and service braking system, electronic pedal transfers signals to valve actuator, valve actuator sends the work of signal control solenoid-operated proportional brake activation valve, and solenoid-operated proportional brake activation valve, relay valve are connected with service braking system and are connected; The input end of solenoid-operated proportional brake activation valve connects energy storage; Service braking system is connected with additional energy storage by two-position two-way solenoid valve, replenishes energy storage and is connected with filter by plural check valve, and the input end of filter is connected with steering pump, and steering pump is connected with fuel tank.
said system, because service braking system is connected with additional energy storage by two-position two-way solenoid valve, replenish energy storage and be connected with filter by plural check valve, the input end of filter is connected with steering pump, steering pump is connected with fuel tank, under system's normal operation, steering pump is transported to the hydraulic oil in fuel tank by filter and replenishes in energy storage through check valve, the purpose of realization energy storage in replenishing energy storage, in case normal brake system goes wrong, above-mentioned two-position two-way solenoid valve energising, make the energy that replenishes in energy storage discharge, thereby realize the purpose of braking, therefore, the reliability of Braking system of the present utility model is high, the sensitieness of braking might as well, the alerting ability of controlling is good.
As specializing, described service braking system comprises the propons service brake back axle service braking system of unifying; Described propons service braking system comprises propons brake activation valve group and propons drg, propons brake activation valve group comprises reducing valve and two-position two-way solenoid valve, the mouth of relay valve is connected with reducing valve, and the mouth of reducing valve is connected with the propons drg, and two-position two-way solenoid valve is connected on reducing valve; Described back axle brake system comprises rear axle brake valve group and rear axle brake vi, described rear axle brake valve group comprises control cock, reducing valve and check valve, described relay valve is connected with the back axle brake cylinder by check valve, the mouth of reducing valve is connected between check valve and back axle brake cylinder, the input end of reducing valve is connected with the mouth of control cock, and the input end of control cock connects energy storage.
As improvement, be connected with electromagnetic valve between the mouth of electronic pedal and the mouth of relay valve.When electromagnetic valve gets when electric, be cut off by the pressure signal of electronic pedal output; When the electromagnetic valve dead electricity, the pressure signal of being exported by electronic pedal is delivered to drg realization braking, thereby has played the effect of protection.
As improvement, the mouth of energy storage is connected with Parking Brake.
Description of drawings
Fig. 1 is the utility model hydraulic efficiency pressure system schematic diagram.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
As shown in Figure 1, the quarry tipper hydraulic brake system comprises fuel tank 2, steering pump 3, high pressure filter 8, braking in a turn valve 27, energy storage 26.1,26.2,26.3, return filter 4.1, electronic pedal 46, valve actuator, solenoid-operated proportional brake activation valve, relay valve, service braking system and Parking Brake 42.
Steering pump 3 can be with the hydraulic oil in fuel tank 2 in high pressure filter 8 be transported to braking in a turn valve 27, described energy storage 26.1,26.2,26.3, be connected on braking in a turn valve 27, when steering pump 3 work, can be in energy storage 26.1,26.2,26.3, middle energy storage, the energy of energy storage 26.1 also can be exported through mouth by braking in a turn valve 27, return filter 4.1 is connected on braking in a turn valve 27, and the oil return of braking in a turn valve 27 is got back to fuel tank through return filter 4.1.
Electronic pedal 46 comprises 3 potentiometers, 1 hydraulic brake valve, three potentiometers are independently, angle in total travel 25 degree scopes changes three potentiometric output voltage signals with pedal, the voltage signal that output is directly proportional to angle, a potentiometer can as the electricity jogging, make the electricity jogging obtain a voltage signal that is directly proportional to angle in 25 degree total travel scopes of pedal; One is used for being divided into two-way control cock actuator, makes in valve actuator 25 degree total travel scopes and obtains a voltage signal that is directly proportional to angle; Hydraulic brake valve when pedal stroke is spent to 8-10, begins to export the brake pressure signal that is directly proportional to angle simultaneously.
Described valve actuator comprises propons valve actuator 43.1 and back axle valve actuator 43.2, and propons valve actuator 43.1 and back axle valve actuator 43.2 are connected on electronic pedal 46; Described solenoid-operated proportional brake activation valve comprises propons solenoid-operated proportional brake activation valve 45.1 and back axle solenoid-operated proportional brake activation valve 45.2, propons solenoid-operated proportional brake activation valve 45.1 is connected connection with the propons valve actuator, back axle solenoid-operated proportional brake activation valve 45.2 is connected with back axle valve actuator 43.2.Relay valve comprises front axle relay valve 44.1 and rear axle relay valve 44.2, and front axle relay valve 44.1 is connected with propons solenoid-operated proportional brake activation valve 45.1, and rear axle relay valve 44.2 is connected with back axle solenoid-operated proportional brake activation valve 45.2; Front axle relay valve 44.1 be connected the input end of axle relay valve 44.2 and be connected with the mouth of braking in a turn valve 27.Described service braking system comprises the propons service brake back axle service braking system of unifying; Described propons service braking system comprises propons brake activation valve group 52 and propons drg 40, propons brake activation valve group 52 comprises reducing valve 51 and two-position two-way solenoid valve 39, the mouth of front axle relay valve 44.1 is connected with reducing valve 51, the mouth of reducing valve 51 is connected with propons drg 40, and two-position two-way solenoid valve 39 is connected on reducing valve 51; Described back axle brake system comprises rear axle brake valve group 36 and rear axle brake vi 41, described rear axle brake valve group 36 comprises control cock 39, reducing valve 38 and check valve 37.1, rear axle relay valve 44.2 is connected with rear axle brake vi 41 by check valve 37.1, the mouth of reducing valve 38 is connected between check valve 37.1 and rear axle brake vi 41, the input end of reducing valve 38 is connected with the mouth of control cock 39, and the input end of control cock 39 connects energy storage.
The propons service braking system is connected with energy storage 26.3 by two-position two-way solenoid valve 50.3, described energy storage 26.3 is for replenishing energy storage, replenish energy storage and be connected to the mouth of braking in a turn valve 27 by check valve, can give by braking in a turn valve 27 and replenish the energy storage energy storage; The back axle service braking system is connected with energy storage 26.2 by two-position two-way solenoid valve 50.4, described energy storage 26.2 is for replenishing energy storage, replenish energy storage and be connected to the mouth of braking in a turn valve 27 by check valve, can give by braking in a turn valve 27 and replenish the energy storage energy storage.
Be connected with electromagnetic valve 47 between the mouth of the mouth of electronic pedal 46 and front-rear axle relay valve, when electromagnetic valve 47 when electric, be cut off by the pressure signal of electronic pedal 46 outputs; When electromagnetic valve 47 dead electricity, the pressure signal of being exported by electronic pedal 46 is delivered to drg realization braking, thereby has played the effect of protection.
Described Parking Brake 42 directly is connected with the mouth of braking in a turn valve 27.
Electronic pedal 46 by two energy storage independent oil supplies, when needing braking, is stepped in dual line braking loop before and after service brake is adopted, and the angle of electronic pedal when 20 spend the left and right, is sent speed-slackening signal to valve actuator 43.1,43.2 greatly.46 minutes two strokes of electronic pedal, front 20 ° of front-rear axle valve actuators are back axle solenoid-operated proportional brake activation valve incoming signal forward not, the mine car electric braking; Rear 5 ° of front-rear axle valve actuators forward, back axle solenoid-operated proportional brake activation valve incoming signal, apply brake-pressure by forward and backward axle relay valve, forward and backward axle relay valve delivery pressure is directly proportional to the electronic pedal angle, guarantees gradual braking.When electronic system breaks down, electronic pedal 46 guarantees the security of system braking directly by front-rear axle solenoid control relay valve delivery pressure size.During normal brake application, fluid all enters drg by relay valve.
Hydraulic brake system of the present utility model can be realized following action.
Braking replenishes oil circuit and forms: fuel tank 2-steering pump 3-high pressure filter 8-check valve-replenish energy storage, and in this process, change-over valve 50 outages.
Front wheel brake, its brake circuit consists of: electronic pedal 46-propons valve actuator 43.1-propons solenoid-operated proportional brake activation valve 45.1-front axle relay valve 44.1-reducing valve 51-propons drg 40, this process, electromagnetic valve 47 cuts off the power supply always.
The trailing wheel braking, its brake circuit consists of: electronic pedal 46-back axle valve actuator 43.2-back axle solenoid-operated proportional brake activation valve 45.2-rear axle relay valve 44.2-rear axle brake vi 41, in this process, electromagnetic valve 47 cuts off the power supply always.
In above-mentioned two processes, when electromagnetic valve 47 when electric, be cut off by the pressure signal of electronic pedal 46 outputs; When electromagnetic valve 47 dead electricity, the pressure signal of being exported by electronic pedal 46 is delivered to drg realization brake.
During emergency brake, directly control electromagnetic valve 50.3 50.4, the energy that replenishes energy storage directly enters into respectively propons drg and rear axle brake vi through electromagnetic valve 50.3,50.4, realizes emergency brake.
Wet-skid road surface: adopt propons brake activation valve group to regulate, but when wet-skid road surface, reducing valve 51 is controlled in change-over valve 39 energisings, adjustable brake pressure prevents the locking of wet-skid road surface tire.
Load braking: in order to reduce driver fatigue, control the loading braking so hand push button additionally is set, i.e. control cock 39 energisings directly make oil circuit enter rear wheel brake.
Braking during standstill: by controlling change-over valve, make Parking Brake carry out work.
in the present embodiment, because service braking system is connected with additional energy storage by two-position two-way solenoid valve, replenish energy storage and be connected with filter by plural check valve, the input end of filter is connected with steering pump, steering pump is connected with fuel tank, under system's normal operation, steering pump is transported to the hydraulic oil in fuel tank by filter and replenishes in energy storage through check valve, the purpose of realization energy storage in replenishing energy storage, in case normal brake system goes wrong, above-mentioned two-position two-way solenoid valve energising, make the energy that replenishes in energy storage discharge, thereby realize the purpose of braking, therefore, the reliability of Braking system of the present utility model is high, the sensitieness of braking might as well, the alerting ability of controlling is good.

Claims (4)

1. quarry tipper hydraulic brake system, comprise electronic pedal, valve actuator, solenoid-operated proportional brake activation valve, relay valve and service braking system, electronic pedal transfers signals to valve actuator, valve actuator sends the work of signal control solenoid-operated proportional brake activation valve, and solenoid-operated proportional brake activation valve, relay valve are connected with service braking system and are connected; The input end of solenoid-operated proportional brake activation valve connects energy storage; It is characterized in that: service braking system is connected with additional energy storage by two-position two-way solenoid valve, replenishes energy storage and is connected with filter by plural check valve, and the input end of filter is connected with steering pump, and steering pump is connected with fuel tank.
2. quarry tipper hydraulic brake system according to claim 1 is characterized in that: described service braking system comprises the propons service brake back axle service braking system of unifying; Described propons service braking system comprises propons brake activation valve group and propons drg, propons brake activation valve group comprises reducing valve and two-position two-way solenoid valve, the mouth of relay valve is connected with reducing valve, and the mouth of reducing valve is connected with the propons drg, and two-position two-way solenoid valve is connected on reducing valve; Described back axle brake system comprises rear axle brake valve group and rear axle brake vi, described rear axle brake valve group comprises control cock, reducing valve and check valve, described relay valve is connected with rear axle brake vi by check valve, the mouth of reducing valve is connected between check valve and rear axle brake vi, the input end of reducing valve is connected with the mouth of control cock, and the input end of control cock connects energy storage.
3. quarry tipper hydraulic brake system according to claim 1, is characterized in that: be connected with electromagnetic valve between the mouth of electronic pedal and the mouth of relay valve.
4. quarry tipper hydraulic brake system according to claim 1, it is characterized in that: the mouth of energy storage is connected with Parking Brake.
CN 201220612010 2012-11-19 2012-11-19 Hydraulic braking system of mining dump truck Expired - Lifetime CN202923631U (en)

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Application Number Priority Date Filing Date Title
CN 201220612010 CN202923631U (en) 2012-11-19 2012-11-19 Hydraulic braking system of mining dump truck

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Application Number Priority Date Filing Date Title
CN 201220612010 CN202923631U (en) 2012-11-19 2012-11-19 Hydraulic braking system of mining dump truck

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CN202923631U true CN202923631U (en) 2013-05-08

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104309551A (en) * 2014-10-28 2015-01-28 广州电力机车有限公司 Control system of 220t mine dump vehicle
CN105905086A (en) * 2016-04-28 2016-08-31 徐州徐工挖掘机械有限公司 ABS hydraulic braking system for non-road mining dump truck
CN106696934A (en) * 2015-08-12 2017-05-24 中冶宝钢技术服务有限公司 Hydraulic brake system of slag pot carrier
CN109843660A (en) * 2017-09-26 2019-06-04 日立建机株式会社 Vehicle brake system
CN110816651A (en) * 2019-11-07 2020-02-21 广州电力机车有限公司 Control method of mining car electro-hydraulic system
CN113165624A (en) * 2018-12-14 2021-07-23 凯斯纽荷兰(中国)管理有限公司 Hydraulic brake device for non-road vehicle
CN114162101A (en) * 2021-12-24 2022-03-11 中车大同电力机车有限公司 Hydraulic braking system and mining dump truck

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104309551A (en) * 2014-10-28 2015-01-28 广州电力机车有限公司 Control system of 220t mine dump vehicle
CN104309551B (en) * 2014-10-28 2017-07-07 广州电力机车有限公司 220 tons of quarry tipper control systems
CN106696934A (en) * 2015-08-12 2017-05-24 中冶宝钢技术服务有限公司 Hydraulic brake system of slag pot carrier
CN105905086A (en) * 2016-04-28 2016-08-31 徐州徐工挖掘机械有限公司 ABS hydraulic braking system for non-road mining dump truck
CN105905086B (en) * 2016-04-28 2018-09-25 徐州徐工挖掘机械有限公司 A kind of off-highway quarry tipper ABS anti-lock brake fluid systems
CN109843660A (en) * 2017-09-26 2019-06-04 日立建机株式会社 Vehicle brake system
CN109843660B (en) * 2017-09-26 2022-07-01 日立建机株式会社 Vehicle brake system
CN113165624A (en) * 2018-12-14 2021-07-23 凯斯纽荷兰(中国)管理有限公司 Hydraulic brake device for non-road vehicle
CN113165624B (en) * 2018-12-14 2024-02-02 凯斯纽荷兰工业(哈尔滨)机械有限公司 Hydraulic brake device for off-road vehicle
CN110816651A (en) * 2019-11-07 2020-02-21 广州电力机车有限公司 Control method of mining car electro-hydraulic system
CN114162101A (en) * 2021-12-24 2022-03-11 中车大同电力机车有限公司 Hydraulic braking system and mining dump truck
CN114162101B (en) * 2021-12-24 2022-09-30 中车大同电力机车有限公司 Hydraulic braking system and mining dump truck

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Granted publication date: 20130508