CN113386723B - Antiskid valve based on dielectric EAP - Google Patents
Antiskid valve based on dielectric EAP Download PDFInfo
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- CN113386723B CN113386723B CN202110771207.9A CN202110771207A CN113386723B CN 113386723 B CN113386723 B CN 113386723B CN 202110771207 A CN202110771207 A CN 202110771207A CN 113386723 B CN113386723 B CN 113386723B
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- plunger
- eap
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- air
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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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/24—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 fluid assistance, drive, or release the fluid being gaseous
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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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/025—Electrically controlled valves
- B60T15/027—Electrically controlled valves in pneumatic systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention relates to an antiskid valve based on dielectric EAP, which comprises a valve body, wherein the valve body is provided with a pressure maintaining cavity and an air exhaust cavity which are connected through an air charging channel, an input port which is communicated with the pressure maintaining cavity, an output port which is communicated with the air exhaust cavity and an air exhaust port, an input port plunger with a through hole and an output port plunger with a through hole are arranged in the valve body in a sliding mode, and an input port EAP driver and an output port EAP driver which are used for driving the input port plunger and the output port plunger respectively. The working principle is that the anti-skid valve function is realized by using a dielectric EAP as a direct driving element and controlling the on-off of an air path.
Description
Technical Field
The invention relates to the technical field of air braking of railway vehicles, in particular to an antiskid valve based on dielectric EAP.
Background
The existing antiskid valve adopts an electromagnetic valve indirect driving mode, the air circuit logic is complex, the response time and fault occurrence points are increased, and in the train braking process, the antiskid valve which can quickly respond to a sliding signal is designed to act as quickly as possible after the wheel rail is detected to relieve the sliding, so that the actual significance is realized on reducing the wheel abrasion and improving the braking performance.
Disclosure of Invention
The object of the present invention is mainly to solve the above mentioned problems of the prior art by providing an anti-slip valve based on a dielectric type EAP.
In order to solve the technical problem, the invention provides an antiskid valve based on a dielectric EAP, which comprises a valve body and is characterized in that: the valve body is provided with a pressure maintaining cavity, an air exhaust cavity, an input port, an output port and an air exhaust port, wherein the pressure maintaining cavity and the air exhaust cavity are connected through an air charging channel; when the input port EAP driver is powered off, the input port plunger is positioned at a closed station, the input port is closed by the input port plunger, when the input port EAP driver is powered on, the input port plunger is positioned at an open station, and the input port is communicated with the pressure maintaining chamber through a through hole on the input port plunger; when the EAP driver of the output port is powered off, the plunger of the output port is positioned at a closed station, the exhaust port is closed, the air charging channel is opened, when the EAP driver of the output port is powered on, the plunger of the output port is positioned at an opened station, the air charging channel is closed, and the exhaust port is communicated with the exhaust cavity through a through hole of the plunger of the output port.
The invention also claims a railway vehicle air brake system, which is characterized in that: including the above-described antiskid valves based on dielectric type EAP.
The working principle of the invention is that the anti-skid valve function is realized by using the dielectric EAP as a direct driving element and controlling the on-off of the gas path.
The invention has the advantages that:
(1) the dielectric EAP (electroactive polymer) is used as a direct drive element, the control is direct, the drive force is large, and the response is extremely quick;
(2) the structure is simple, and weight reduction is facilitated;
(3) circuit elements such as an electromagnetic valve are not used, so that the electromagnetic interference resistance is strong;
(4) the device has no large current, does not depend on electromagnetic adsorption action, and has no electric adhesion risk;
(5) no complex gas path is needed, and the response is quicker;
(6) in the pressure maintaining state, a larger pressure maintaining cavity is arranged under the same volume, so that the pressure of an output port is kept stable in the pressure maintaining process;
(7) in the pressure maintaining state, if the pressure drop in the pressure maintaining cavity is overlarge, the pressure of the output port can be maintained to be stable by supplying air into the pressure maintaining cavity through an overflow valve arranged on the input port;
(8) in a relieving state, the air exhaust channel is provided with an independent small cavity (air exhaust cavity) so as to achieve the purpose of quickly reducing the pressure;
(9) in the relieving state, the pressure of the pressure maintaining cavity is kept stable in the air exhaust state, and when the pressure maintaining cavity is switched from relieving to braking, the pressure maintaining cavity fills air to the output port before the input port, so that the response speed is improved;
(10) and the state is relieved, if the pressure drop in the pressure maintaining cavity is overlarge, the air can be supplemented into the pressure maintaining cavity through the arrangement of an overflow valve on the input, and the air can be rapidly filled into the output port when the switching is switched to the braking state.
Drawings
FIG. 1 is a schematic diagram of the structure of the antiskid valve based on the dielectric EAP.
Fig. 2 is a schematic view of the antiskid valve in a pressure maintaining state.
Fig. 3 is a schematic diagram of the braking state of the antiskid valve.
FIG. 4 is a schematic view of the anti-skid valve in a relaxed state.
The numbers in the figures are as follows:
1-input port, 2-output port, 3-exhaust port, 4-input port EAP driver, 5-input port plunger, 6-overflow valve, 7-output port EAP driver, 8-output port plunger, 9-valve body, 10-air charging channel, A-pressure maintaining cavity and B-air exhaust cavity.
Detailed Description
The following explains an embodiment of the present invention with reference to the drawings.
As shown in figure 1, the antiskid valve based on the dielectric EAP comprises a valve body 9, wherein the valve body 9 is provided with a pressure maintaining cavity A and an air exhausting cavity B (the air exhausting cavity B is an independent cavity or an air exhausting channel) which are connected through an air charging channel 10, an input port 1 communicated with the pressure maintaining cavity A, an output port 2 and an exhaust port 3 communicated with the air exhausting cavity B, an input port plunger 5 with a through hole and an output port plunger 8 with a through hole are arranged in the valve body 9 in a sliding mode, and an input port EAP driver 4 and an output port EAP driver 7 are used for driving the input port plunger 5 and the output port plunger 8 respectively. The input port EAP driver 4 and the output port EAP driver 7 are dielectric type EAP.
When the input port EAP driver 4 is powered off, the input port plunger 5 is in a closed station, the input port 1 is closed by the input port plunger 5, when the input port EAP driver 4 is powered on, the input port plunger 5 is in an open station, and the input port 1 is communicated with the pressure maintaining chamber A through a through hole in the input port plunger 5; when the EAP driver 7 of the output port is powered off, the plunger 8 of the output port is in a closed station, the exhaust port 3 is closed, the air charging channel 11 is opened, when the EAP driver 7 of the output port is powered on, the plunger 8 of the output port is in an open station, the air charging channel 11 is closed, and the exhaust port 3 is communicated with the exhaust cavity B through a through hole of the plunger 8 of the output port.
In the embodiment shown in fig. 1, the input port 1 is provided with a relief valve 6 for supplying air to the holding pressure chamber a. Specifically, the input port 1 is partially inserted into the pressure-maintaining chamber a, and the relief valve 6 is mounted to the input port 1 and located inside the pressure-maintaining chamber a. And the state is relieved, if the pressure drop in the pressure maintaining cavity is overlarge, the air can be supplemented into the pressure maintaining cavity through the arrangement of an overflow valve on the input, and the air can be rapidly filled into the output port when the switching is switched to the braking state.
The antiskid valve based on the dielectric EAP has three working conditions: the pressure maintaining, braking and relieving respectively correspond to a pressure maintaining method of a braking system, a braking method of the braking system and a relieving method of the braking system.
The pressure holding condition is shown in fig. 2 (the reference numbers of the components can be seen in fig. 1):
the input port EAP driver 4 and the output port EAP driver 7 are not powered, the input port plunger 5 and the output port plunger 8 are both located at initial positions, the input port 1 is closed by the input port plunger 5, the exhaust port 3 is closed by the output port plunger 8, meanwhile, the air charging channel 10 is a passage, the pressure maintaining cavity A is communicated with the air exhaust cavity B to form a large pressure maintaining cavity, and pressure maintaining of the output port 2 is achieved.
The braking condition is shown in fig. 3 (reference numbers of the components can be seen in fig. 1):
when a braking instruction is received, the input port EAP driver 4 is electrically expanded to push the input port plunger 5 to lead the input port 1 and the pressure maintaining cavity A through the hole, and air from the air braking device is filled into the pressure maintaining cavity A through the input port 1; the EAP driver 7 of the output port is not electrified, the plunger 8 of the output port is positioned at the initial position, the exhaust port 3 is sealed by the plunger 8 of the output port, the air charging channel 10 is a passage, the pressure maintaining cavity A is communicated with the exhaust cavity B, and air charged into the pressure maintaining cavity A charges the air of a pressure cylinder (a brake device) at the downstream of the antiskid valve through the air charging channel 10.
The mitigation mode is shown in fig. 4 (the reference numbers of the components can be seen in fig. 1):
when a release signal sent by sliding is received, the output port EAP driver 7 is electrified, the output port plunger 8 is pushed to be communicated with the exhaust port 3 and the exhaust cavity B through the hole, the air charging channel 10 is sealed at the same time, and air from the downstream of the antiskid valve is exhausted to the atmosphere through the output port 2 and the exhaust port 3, so that the release function of the antiskid valve is realized. At the same time, the inlet EAP driver 4 is not energized, the inlet plunger 5 is in the initial position, and the inlet 1 is closed by the inlet plunger 5. And the state is relieved, if the pressure drop in the pressure maintaining cavity is overlarge, the air can be supplemented into the pressure maintaining cavity through the arrangement of an overflow valve on the input, and the air can be rapidly filled into the output port when the switching is switched to the braking state.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (10)
1. An antiskid valve based on dielectric type EAP, comprising a valve body (9), characterized in that: the air-filling valve is characterized in that the valve body (9) is provided with a pressure maintaining cavity (A) and an air exhaust cavity (B) which are connected through an air filling channel (10), an input port (1) communicated with the pressure maintaining cavity (A), an output port (2) and an air exhaust port (3) communicated with the air exhaust cavity (B), an input port plunger (5) with a through hole and an output port plunger (8) with a through hole are arranged in the valve body (9) in a sliding mode, and an input port EAP driver (4) and an output port EAP driver (7) which are used for driving the input port plunger (5) and the output port plunger (8) respectively; when the input port EAP driver (4) loses power, the input port plunger (5) is positioned at a closed station, the input port (1) is closed by the input port plunger (5), when the input port EAP driver (4) is powered on, the input port plunger (5) is positioned at an open station, and the input port (1) is communicated with the pressure maintaining chamber (A) through a through hole on the input port plunger (5); when the output port EAP driver (7) loses power, the output port plunger (8) is positioned at a closed station, the exhaust port (3) is closed, the air charging channel (10) is opened, when the output port EAP driver (7) is powered on, the output port plunger (8) is positioned at an opened station, the air charging channel (10) is closed, and the exhaust port (3) is communicated with the exhaust cavity (B) through a through hole of the output port plunger (8).
2. A dielectric EAP based antiskid valve in accordance with claim 1, wherein: the input port EAP driver (4) and the output port EAP driver (7) are dielectric type EAP.
3. A dielectric EAP based antiskid valve in accordance with claim 1, wherein: the input port (1) is provided with an overflow valve (6) used for supplying air to the pressure maintaining cavity (A).
4. A dielectric EAP based antiskid valve according to claim 3, wherein: the input port (1) is partially inserted into the pressure maintaining cavity (A), and the overflow valve (6) is installed on the input port (1) and is located inside the pressure maintaining cavity (A).
5. A dielectric EAP based antiskid valve in accordance with claim 1, wherein: the exhaust cavity (B) is an independent cavity or an exhaust channel.
6. A railway vehicle air brake system, characterized by: comprising a non-slip valve based on a dielectric EAP according to any of claims 1-5.
7. A method of maintaining pressure in a brake system, characterized by: the antiskid valve based on the dielectric EAP according to any one of claims 1-5, wherein the input EAP driver (4) and the output EAP driver (7) are not powered, the input plunger (5) and the output plunger (8) are both located at initial positions, the input port (1) is closed by the input plunger (5), the exhaust port (3) is closed by the output plunger (8), the air charging channel (10) is a passage, and the pressure maintaining cavity (A) is communicated with the air discharging cavity (B) to form a larger pressure maintaining cavity, so that pressure maintaining is realized on the output port (2).
8. A braking method of a braking system, characterized in that: by means of the dielectric EAP based anti-slip valve according to any of claims 1-5, when a braking command is received, the input EAP driver (4) is electrically expanded to push the input plunger (5) to conduct the input port (1) and the pressure maintaining chamber (A) through the hole, and air from the air brake is filled into the pressure maintaining chamber (A) through the input port (1); the output port EAP driver (7) is not powered, the output port plunger (8) is located at the initial position, the exhaust port (3) is sealed by the output port plunger (8), meanwhile, the air charging channel (10) is a passage, the pressure maintaining cavity (A) is communicated with the air discharging cavity (B), and air charged into the pressure maintaining cavity (A) charges air to the braking device at the downstream of the antiskid valve through the air charging channel (10).
9. A method of brake system mitigation, comprising: by means of an anti-skid valve based on dielectric type EAP according to any of claims 1-5, when a relief signal is received due to sliding, the output EAP driver (7) is energized, pushing the output plunger (8) to conduct the exhaust port (3) and the exhaust chamber (B) through the hole, and simultaneously closing the charging channel (10), air from the downstream of the anti-skid valve is discharged to the atmosphere through the output port (2) and the exhaust port (3), and the relief function of the anti-skid valve is achieved.
10. A mitigation method for a brake system according to claim 9, characterized in that: the input port EAP driver (4) is not powered, the input port plunger (5) is located at the initial position, and the input port (1) is closed by the input port plunger (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110771207.9A CN113386723B (en) | 2021-07-08 | 2021-07-08 | Antiskid valve based on dielectric EAP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110771207.9A CN113386723B (en) | 2021-07-08 | 2021-07-08 | Antiskid valve based on dielectric EAP |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113386723A CN113386723A (en) | 2021-09-14 |
| CN113386723B true CN113386723B (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110771207.9A Active CN113386723B (en) | 2021-07-08 | 2021-07-08 | Antiskid valve based on dielectric EAP |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009086923A1 (en) * | 2008-01-08 | 2009-07-16 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Brake cylinder for creating a brake force |
| CN105151034A (en) * | 2015-10-12 | 2015-12-16 | 四川制动科技股份有限公司 | Plunger type three-way valve |
| CN205632461U (en) * | 2016-05-27 | 2016-10-12 | 中国铁道科学研究院 | Vehicle pneumatic braking control valve and guiding valve structure thereof |
| CN109263681A (en) * | 2018-11-15 | 2019-01-25 | 中车株洲电力机车有限公司 | A kind of electro-pneumatic brake |
-
2021
- 2021-07-08 CN CN202110771207.9A patent/CN113386723B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009086923A1 (en) * | 2008-01-08 | 2009-07-16 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Brake cylinder for creating a brake force |
| CN105151034A (en) * | 2015-10-12 | 2015-12-16 | 四川制动科技股份有限公司 | Plunger type three-way valve |
| CN205632461U (en) * | 2016-05-27 | 2016-10-12 | 中国铁道科学研究院 | Vehicle pneumatic braking control valve and guiding valve structure thereof |
| CN109263681A (en) * | 2018-11-15 | 2019-01-25 | 中车株洲电力机车有限公司 | A kind of electro-pneumatic brake |
Non-Patent Citations (1)
| Title |
|---|
| 二通插装阀参数对提升机安全制动过程的影响;孙富强等;《矿山机械》;20090810(第15期);全文 * |
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| CN113386723A (en) | 2021-09-14 |
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