CN211765479U - Hydraulic braking system - Google Patents
Hydraulic braking system Download PDFInfo
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- CN211765479U CN211765479U CN201922484616.1U CN201922484616U CN211765479U CN 211765479 U CN211765479 U CN 211765479U CN 201922484616 U CN201922484616 U CN 201922484616U CN 211765479 U CN211765479 U CN 211765479U
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Abstract
The utility model discloses a hydraulic braking system, which comprises a three-way pressure reducing component and a three-way reversing valve component; the input end of the three-way pressure reducing assembly is connected with the input pipeline, and the output end of the pressure reducing assembly is connected with the input end of the reversing valve assembly through the transition pipeline; the other output end of the three-way pressure reducing assembly is connected to the oil tank through a return pipeline I; the output end of the three-way reversing valve assembly is connected to an interface A through an output pipeline, and the interface A is used for connecting a braking clamp; the other output end of the three-way reversing valve assembly is connected to the oil tank through a return pipeline II. The utility model also provides a hydraulic braking system who contains above-mentioned pressure output control system, overall structure is simple, and control accuracy is high, does benefit to the even running of guarantee braking clamp.
Description
Technical Field
The utility model relates to a track traffic technical field, concretely relates to hydraulic braking system.
Background
Urban rail transit is a novel traffic mode and becomes a traditional Chinese medicine component of urban public traffic, a braking system is an important component in an urban rail transit vehicle system, and the performance of the braking system is directly related to the overall comprehensive indexes such as the running safety of urban rail vehicles. The brake system working condition of the suspension type railway vehicle at least comprises the following working conditions: service braking, emergency braking, safety braking, hold braking, and park braking. Electric braking is preferentially used in service braking, and the electric braking capability is fully utilized. When the electric braking force is insufficient, the hydraulic braking is supplemented according to the requirement of the total braking force, and the electric braking and the hydraulic braking can be stably converted. The hydraulic brake has relatively independent brake capacity, and can ensure the hydraulic brake to play a role under the condition that the electric brake fails, so that the vehicle can be safely stopped. During parking braking, the vehicle will not roll when applying parking brakes under maximum load on the maximum slope of the line. The braking system adjusts the braking force according to the empty and heavy vehicle load.
The hydraulic braking system equipment is arranged on a bogie of the suspension type railway vehicle, the hydraulic braking system is used for controlling the pressure of the braking clamp, the braking force is provided by the hydraulic pressure, and the safety and the stability of the urban railway vehicle in operation are influenced by the control precision of the braking clamp.
SUMMERY OF THE UTILITY MODEL
In order to further improve suspension type rail vehicle braking clamp pressure control precision, the utility model provides a hydraulic braking system, simple structure, control accuracy is high, does benefit to the even running of guarantee braking clamp.
The utility model discloses a following technical scheme realizes:
a pressure output control system for hydraulic braking comprises a three-way pressure reducing assembly and a three-way reversing valve assembly; the input end of the three-way pressure reducing assembly is connected with the input pipeline, and the output end of the pressure reducing assembly is connected with the input end of the reversing valve assembly through the transition pipeline; the other output end of the three-way pressure reducing assembly is connected to the oil tank through a return pipeline I; the output end of the three-way reversing valve assembly is connected to an interface A through an output pipeline, and the interface A is used for connecting a braking clamp; the other output end of the three-way reversing valve assembly is connected to the oil tank through a return pipeline II.
Furthermore, a valve I is further arranged on the return pipeline I and used for controlling the on-off of the flowing of the hydraulic oil in the return pipeline I.
Furthermore, a valve II is further arranged on the return pipeline II and used for controlling the on-off of the flowing of the hydraulic oil in the return pipeline II.
Furthermore, a pressure relief pipeline I is further arranged on a bypass of the return pipeline II between the three-way reversing valve assembly and the valve II, and an overflow valve I is arranged on the pressure relief pipeline.
Furthermore, a pressure sensor and/or a pressure measuring joint are/is further arranged on the output pipeline and used for measuring the pressure of the hydraulic oil output by the three-way pressure reducing assembly.
Furthermore, a filter is arranged on the output pipeline.
Furthermore, the three-way pressure reducing assembly adopts a three-way proportional pressure reducing valve; the three-way reversing valve component adopts a two-position three-way electromagnetic valve.
The three-way proportional pressure reducing valve is arranged on the oil path block, the working principle of the three-way proportional pressure reducing valve is that the three-way proportional pressure reducing valve is driven and controlled by pulse current, the opening of a valve port is controlled according to a duty ratio signal input by an EBCU (electronic brake control unit), and then the output of oil pressure is controlled, and the output oil pressure can be changed through the input current of a proportional electromagnet. If the proportional electromagnet is disconnected, the oil pressure is released to the oil return tank through the return line I.
A hydraulic brake system comprises a pressure supply element and a pressure control element, wherein the pressure control element adopts the pressure output control system for hydraulic braking; the output end of the pressure supply element is connected with the input pipeline.
Further, the pressure supply element comprises an oil pump, the input end of the oil pump is connected to the oil tank through a pipeline, the output end of the oil pump is connected to a main oil supply pipeline, the output end of the main oil supply pipeline is divided into two branch pipelines, one branch pipeline is connected with an S interface, the other branch pipeline is connected to the pressure control element, and the S interface is used for being connected to the energy accumulator; and a branch pipeline connected to the pressure control element is provided with a return pipeline III in a bypass mode, and the return pipeline is provided with a valve III.
Further, still be equipped with the check valve on the oil supply main line, the bypass is equipped with establishes pressure release pipeline II on the oil supply main line that is located between check valve and the oil pump, be equipped with overflow valve II on the pressure release pipeline II.
The utility model discloses have following advantage and beneficial effect:
the utility model discloses a hydraulic transmission and control mode provide power and control for suspension type rail vehicle arrestment mechanism, are applicable to suspension type rail vehicle's hydraulic braking system, simple structure, and control accuracy is high, does benefit to the even running of guarantee brake clamp.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a hydraulic braking system according to the present invention;
fig. 2 is a structural view of the hydraulic brake system.
Reference numbers and corresponding part names in the drawings: the system comprises a 1-three-way pressure reducing assembly, a 2-three-way reversing valve assembly, a 3-valve I, a 4-valve II, a 5-overflow valve I, a 6-pressure sensor, a 7-pressure measuring joint, an 8-filter, a 9-oil pump, a 10-energy accumulator, a 11-valve III, a 12-one-way valve, a 13-overflow valve II, a 14-A interface, a 15-S interface and a 16-motor.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
The embodiment provides a pressure output control system for hydraulic braking, which comprises a three-way pressure reducing assembly 1 and a three-way reversing valve assembly 2, wherein the three-way pressure reducing assembly 1 adopts a three-way proportional pressure reducing valve, and the three-way reversing valve assembly 2 adopts a two-position three-way electromagnetic valve. The input end of the three-way pressure reducing assembly 1 is connected with an input pipeline, and the output end of the pressure reducing assembly 1 is connected with the input end of the reversing valve assembly 2 through a transition pipeline; the other output end of the three-way pressure reducing assembly 1 is connected to an oil tank through a return pipeline I; the output end of the three-way reversing valve component 2 is connected to an interface A through an output pipeline, and the interface A is used for connecting a brake clamp; the other output end of the three-way reversing valve component 2 is connected to the oil tank through a return pipeline II.
The return pipeline I is also provided with a valve I3, and a valve I3 is used for controlling the on-off of the flow of the hydraulic oil in the return pipeline I; a valve II4 is also arranged on the return pipeline II, and a valve II4 is used for controlling the on-off of the flow of the hydraulic oil in the return pipeline II; the valve I3 and the valve II4 both adopt two-position two-way electromagnetic valves.
And a pressure relief pipeline I is also arranged on a bypass on the return pipeline II between the three-way reversing valve component 2 and the valve II4, and an overflow valve I5 is arranged on the pressure relief pipeline.
The output pipeline is also provided with a pressure sensor 6 and/or a pressure measuring joint 7 for the pressure of the hydraulic oil output by the three-way pressure reducing assembly 1; and the output pipeline is also provided with a filter 8 for cleaning the oil output by the three-way pressure reducing assembly 1.
Example 2
The embodiment provides a hydraulic brake system, which comprises a pressure supply element and a pressure control element, wherein the pressure control element adopts the pressure output control system for hydraulic braking provided by the embodiment 1; the output end of the pressure supply element is connected with the input pipeline.
The pressure supply element comprises an oil pump 9, the oil pump 9 adopts a gear pump, and the gear pump is driven by a motor 16; the input end of the oil pump 9 is connected to an oil tank through a pipeline, the output end of the oil pump is connected to an oil supply main pipeline, the output end of the oil supply main pipeline is divided into two branch pipelines, one branch pipeline is connected with an S interface, the other branch pipeline is connected to a pressure control element, and the S interface is used for being connected to an energy accumulator; a branch pipeline connected to the pressure control element is provided with a return pipeline III in a bypass mode, the return pipeline is provided with a valve III11, and the valve III11 adopts a manual valve.
The oil supply main pipeline is also provided with a one-way valve 12, a pressure relief pipeline II is arranged on the oil supply main pipeline between the one-way valve 12 and the oil pump 9 in a bypass mode, and the pressure relief pipeline II is provided with an overflow valve II 13; further, a pressure sensor and a lateral pressure joint may be provided on the branch line connected to the S-port.
The working principle of the hydraulic brake system provided by the embodiment 2 is as follows:
1. energy storage process: the oil in the oil tank sequentially passes through the filter, the one-way square, the pressure sensor and the S interface and then is filled into the energy accumulator through the motor-driven oil pump, the oil pressure in the energy accumulator is detected through the pressure sensor, and the motor stops working after the oil pressure in the energy accumulator reaches a set value. The pressure control element is supplied with pressure via the accumulator via a further branch line.
The overflow valve is arranged on the oil path block and used for protecting the hydraulic braking system and preventing the system pressure from being too high, so that the system pressure cannot exceed the rated value of the system; the accumulator is not in the oil passage block but is a part of the pressure generation for storing the pressure oil supplied from the oil pump and supplying the hydraulic pressure to the brake caliper via the pressure control member. The manual valve, namely the valve III is arranged on the oil circuit block and used for discharging the pressure in the energy accumulator and reducing the pressure to zero through manual operation; furthermore, the pressure may be relieved by a manual valve when the hydraulic brake system is in service.
2. And (3) a clamp pressure supply process: the accumulator stores pressure oil, and the pressure oil passes through the branch pipeline, the input pipeline of the pressure control element, the three-way pressure reducing assembly, the output pipeline and the A interface and then is used for braking the clamp.
3. And (3) auxiliary relieving process: under the condition that the brake clamp is relieved, the hydraulic connection from the brake clamp to the oil tank is cut off through a valve II, and the direct current motor is prevented from being restarted when the vehicle moves.
When an emergency occurs, the reversing valve assembly loses power, and the hydraulic pressure is reduced to the preset pressure through the overflow valve I. When the reversing valve assembly fails, the three-way pressure reducing assembly reduces the hydraulic pressure to zero and applies the maximum braking force. Through installing valve I on the oil circuit piece, can carry out the braking clamp pressure after losing the electricity and alleviate.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A hydraulic brake system is characterized by comprising a three-way pressure reducing assembly (1) and a three-way reversing valve assembly (2); the input end of the three-way pressure reducing assembly (1) is connected with an input pipeline, and the output end of the pressure reducing assembly (1) is connected with the input end of the reversing valve assembly (2) through a transition pipeline;
the other output end of the three-way pressure reducing assembly (1) is connected to an oil tank through a return pipeline I;
the output end of the three-way reversing valve component (2) is connected to an interface A through an output pipeline, and the interface A is used for connecting a brake clamp; the other output end of the three-way reversing valve component (2) is connected to the oil tank through a return pipeline II.
2. A hydraulic brake system according to claim 1, wherein a valve I (3) is further disposed on the return line I, and the valve I (3) is configured to control the on/off of the flow of hydraulic oil in the return line I.
3. The hydraulic brake system as recited in claim 1, wherein the return line II is further provided with a valve II (4), and the valve II (4) is used for controlling the on-off of the flow of the hydraulic oil in the return line II.
4. A hydraulic brake system according to claim 1, wherein a pressure relief line I is provided by-passing through a return line II between the three-way reversing valve assembly (2) and the valve II (4), and an overflow valve I (5) is provided on the pressure relief line.
5. A hydraulic braking system according to claim 1, characterised in that the output line is also provided with a pressure sensor (6) and/or a pressure tap (7) for the pressure of the hydraulic oil output by the three-way pressure reducing assembly (1).
6. A hydraulic brake system according to claim 1, wherein a filter (8) is provided on the output conduit.
7. A hydraulic braking system according to claim 1, characterized in that the three-way pressure reducing assembly (1) employs a three-way proportional pressure reducing valve; the three-way reversing valve component (2) adopts a two-position three-way electromagnetic valve.
8. A hydraulic brake system according to any one of claims 1 to 7, wherein the output of the pressure supply member is connected to the inlet line.
9. A hydraulic brake system according to claim 8, wherein the pressure supply unit comprises an oil pump (9), the oil pump (9) having an input connected to an oil tank via a pipeline and an output connected to a main oil supply pipeline, the main oil supply pipeline having an output divided into two branch pipelines, one of the branch pipelines being connected to an S-port, the other branch pipeline being connected to the pressure control unit, the S-port being adapted to be connected to an accumulator; and a branch pipeline connected to the pressure control element is provided with a return pipeline III in a bypass mode, and the return pipeline is provided with a valve III (11).
10. A hydraulic brake system according to claim 9, wherein a check valve (12) is further disposed on the oil supply main line, a pressure relief line II is disposed on the oil supply main line between the check valve (12) and the oil pump (9) in a bypass manner, and an overflow valve II (13) is disposed on the pressure relief line II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922484616.1U CN211765479U (en) | 2019-12-31 | 2019-12-31 | Hydraulic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922484616.1U CN211765479U (en) | 2019-12-31 | 2019-12-31 | Hydraulic braking system |
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| Publication Number | Publication Date |
|---|---|
| CN211765479U true CN211765479U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922484616.1U Active CN211765479U (en) | 2019-12-31 | 2019-12-31 | Hydraulic braking system |
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| CN (1) | CN211765479U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111016864A (en) * | 2019-12-31 | 2020-04-17 | 中铁磁浮科技（成都）有限公司 | Hydraulic braking system suitable for suspension type rail vehicle |
| CN112984005A (en) * | 2021-03-31 | 2021-06-18 | 安徽江淮汽车集团股份有限公司 | Wet clutch hydraulic control system and automatic gearbox |
-
2019
- 2019-12-31 CN CN201922484616.1U patent/CN211765479U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111016864A (en) * | 2019-12-31 | 2020-04-17 | 中铁磁浮科技（成都）有限公司 | Hydraulic braking system suitable for suspension type rail vehicle |
| CN112984005A (en) * | 2021-03-31 | 2021-06-18 | 安徽江淮汽车集团股份有限公司 | Wet clutch hydraulic control system and automatic gearbox |
| CN112984005B (en) * | 2021-03-31 | 2022-03-29 | 安徽江淮汽车集团股份有限公司 | Wet clutch hydraulic control system and automatic gearbox |
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Effective date of registration: 20221024 Address after: No.4 Huoju Road, hi tech Development Zone, Baoji City, Shaanxi Province 721000 Patentee after: CHINA RAILWAY BAOJI BRIDGE GROUP Co.,Ltd. Address before: 610000 China Railway Rail Transit high tech Industrial Park, NO.666, jinfenghuang Avenue, Jinniu District, Chengdu, Sichuan Province Patentee before: CHINA RAILWAY MAGLEV SCIENCE & TECHNOLOGY (CHENGDU) Co.,Ltd. |