CN102700543B - Pear-shaped hole equipped braking distribution valve for heavy-loaded long and large train - Google Patents
Pear-shaped hole equipped braking distribution valve for heavy-loaded long and large train Download PDFInfo
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- CN102700543B CN102700543B CN201210149895.6A CN201210149895A CN102700543B CN 102700543 B CN102700543 B CN 102700543B CN 201210149895 A CN201210149895 A CN 201210149895A CN 102700543 B CN102700543 B CN 102700543B
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- hole
- slide valve
- pyriform
- braking
- valve seat
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- 238000000034 method Methods 0.000 claims abstract description 14
- 239000011148 porous material Substances 0.000 claims description 77
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000005273 aeration Methods 0.000 description 7
- 230000006837 decompression Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000003137 locomotive effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
A pear-shaped hole equipped braking distribution valve for a heavy-loaded long and large train includes a slide valve and a slide valve seat, wherein the slide valve and the slide valve seat are provided with a slide valve braking charging hole and a slide valve seat hole respectively, and the slide valve slides up and down along the slide valve seat to realize overlap/non-overlap between the slide valve braking charging hole and the slide valve seat hole. The linear relation between the slide valve movement distance and the overlap area between the slide valve braking charging hole and the slide valve seat hole is divided into two segments, that is, the segment from a non-braking position of the slide valve to 1/2-2/3 of the slide valve maximum movement distance satisfies the linear relation y1=k1x1, and the segment from 1/2-2/3 of the slide valve maximum movement distance to the slide valve maximum movement distance satisfies the linear relation y2=ymax-k2x2. According to the invention, the pressure difference between vehicle brake cylinders at train front and back parts is reduced, without changing the existing train braking capacity, to improve consistency of charging speeds of the vehicle brake cylinders at the train front and back parts and reduce longitudinal impulse of the heavy-loaded long and large train; and the implementation method is simple and there is small modification on the original structure.
Description
Technical field
The invention belongs to train braking technical field, relate in particular to heavily loaded long and big train braking distributing valve.
Background technology
Heavy duty long and big train is world's goods train developing direction, and it is heavy haul transport main development pattern that axle heavily increases, organizes into groups quantity increase, increases the modal heavy haul transport form that train marshalling list Shuo Shi China adopts at present.The increase of marshalling number significantly increases train length, and the brake cylinder aeration speed significant difference of train front and rear portions vehicle increases, the sharp increase that brings thus train longitudinal impulse.Excessive train longitudinal impulse not only brings the danger of hitch fracture, to transportation safety, brings very big hidden danger, has aggravated the abrasion of coupler and draft gear simultaneously, reduces the service life of vehicle structure, coupler and draft gear.Heavy duty long and big train is most crucial, be also that the problem of needing solution most badly reduces train longitudinal impulse exactly.
In prior art, from the brake system main way that reduces train longitudinal impulse of starting with, be by improving the braking propagation rate of train braking system, but, in existing railroad train brake system, improve braking propagation rate and substantially reach capacity, the object that therefore realizes reduction train longitudinal impulse by improving train braking velocity of wave has been difficult to reach.
Mobile relation between the guiding valve of existing car brakeing distributing valve and slide valve seat is, when guiding valve is moved upwards up to vertex position, slide valve seat hole just in time all overlaps with guiding valve braking air-filled pore, and brake cylinder air-filled pore is maximum, now brake cylinder inflation area is maximum, and brake cylinder aeration speed is the fastest.On the guiding valve of car brakeing distributing valve, moving distance is the linear relationship of direct ratio with the fundamental relation of brake cylinder air-filled pore area.Guiding valve miles of relative movement is relevant to train pipe decompression rate, and train pipe decompression rate is faster, and guiding valve miles of relative movement is larger, and brake cylinder air-filled pore is just larger, and brake cylinder inflation is faster.Singly compile in car the anterior train pipe decompression rate of train very fast, train rear portion train pipe decompression rate slows down, this has just caused, and anterior vehicle guiding valve miles of relative movement is long, brake cylinder air-filled pore is large, braking potential is strong, rear portion vehicle guiding valve miles of relative movement is short, brake cylinder air-filled pore is little, a little less than braking potential, in train, the difference of each car brakeing ability has caused excessive train longitudinal impulse.Existing axle distribution valves can make train produce excessive longitudinal force when service braking.In combined train, near the vehicle train pipe decompression rate of locomotive, to singly to compile car middle front part vehicle similar, similar to the rear portion vehicle of singly compiling car away from the vehicle train pipe decompression rate of locomotive, there is the problem that train longitudinal impulse is large in combined train too.
Summary of the invention
The object of the invention is the problems and shortcomings that exist for prior art, a kind of train braking velocity of wave and train pipe decompression rate of not changing is provided, and keep in the constant situation of train braking ability, be in the constant situation of train braking distance, realize the technology that reduces heavily loaded long and big train longitudinal impulse.
Technical scheme of the present invention is achieved in that the braking distributing valve in pyriform hole for a kind of heavily loaded long and big train, braking distributing valve mainly comprises main valve, emergency valve, office subtracts valve and accelerates release valve, in main valve, mainly comprise guiding valve and slide valve seat, guiding valve and slide valve seat are respectively equipped with guiding valve braking air-filled pore and slide valve seat hole, guiding valve coordinates and slides up and down with slide valve seat in spool stroke, guiding valve in non-braking position guiding valve braking air-filled pore and slide valve seat hole in coincidence status not mutually, in sliding up and down process along slide valve seat, guiding valve through being disconnected to whole coincidences, overlaps to the process disconnecting with whole between guiding valve braking air-filled pore and slide valve seat hole, it is characterized in that described guiding valve braking air-filled pore and slide valve seat hole are pyriform holes, pyriform hole by a big hole with one above big hole and the aperture being connected with big hole form, setting is inverted in the guiding valve braking pyriform hole of air-filled pore and the pyriform hole in slide valve seat hole mutually, guiding valve is from non-braking position along the up process that slides into 1/2-2/3 spool stroke of slide valve seat, the guiding valve braking big hole in pyriform hole of air-filled pore and the big hole in the pyriform hole in slide valve seat hole are by first all overlapping at coincident to the guiding valve braking big hole in pyriform hole of air-filled pore and the big hole in the pyriform hole in slide valve seat hole, the area that the guiding valve braking big hole in pyriform hole of air-filled pore and the big hole in the pyriform hole in slide valve seat hole all overlap is guiding valve braking air-filled pore and slide valve seat hole coincidence area maximum area in the up sliding process of guiding valve, guiding valve continues to go upward to guiding valve range, the guiding valve braking big hole in pyriform hole of air-filled pore and the big hole coincidence area in the pyriform hole in slide valve seat hole progressively dwindle, the guiding valve braking aperture in pyriform hole of air-filled pore and the aperture in the pyriform hole in slide valve seat hole start to overlap with the big hole in pyriform hole in slide valve seat hole and the big hole in the pyriform hole of guiding valve braking air-filled pore, until the guiding valve braking little bore edges in pyriform hole of air-filled pore and the big hole coincident in the pyriform hole in slide valve seat hole, the big hole coincident in the pyriform hole of the little bore edges in the pyriform hole in slide valve seat hole and guiding valve braking air-filled pore.
The braking distributing valve in pyriform hole for a kind of heavily loaded long and big train of the present invention, the aperture that it is characterized in that described pyriform hole is a kind of in circular hole, elliptical aperture and slotted hole.
The braking distributing valve in pyriform hole for a kind of heavily loaded long and big train of the present invention, the little hole area that it is characterized in that described pyriform hole is the 1/3-1/4 of the big hole area in pyriform hole.
Principle of the present invention is;
The inflation of car brakeing cylinder is mainly according to the coincidence relation between slide valve seat hole and guiding valve braking air-filled pore, to realize inflation area to regulate, and then realizes auxiliary reservoir to the adjusting of brake cylinder gas-filled switching tube and aeration speed.The present invention brakes the relation of distributing valve internal spool valve braking air-filled pore and the large coincidence area of slide valve seat Kongzui and guiding valve miles of relative movement by change, change the linear relationship of direct ratio between guiding valve miles of relative movement and car brakeing cylinder air-filled pore area, make guiding valve miles of relative movement be divided into two sections with the relation that guiding valve braking air-filled pore and slide valve seat hole overlap between area: first paragraph is along with guiding valve miles of relative movement increases, coincidence area change; Second segment is to increase with guiding valve miles of relative movement, and coincidence area reduces.Be while moving on guiding valve starts, between guiding valve braking air-filled pore and slide valve seat hole, overlap area along with the proportional linear relationship of guiding valve miles of relative movement, when guiding valve is moved upwards up to 1/2-2/3 guiding valve maximum moving distance position, between guiding valve braking air-filled pore and slide valve seat hole, realize maximum area and overlap, now brake cylinder air-filled pore maximum; When guiding valve moves up again, the area that overlaps between guiding valve braking air-filled pore and slide valve seat hole reduces gradually.Be that brake cylinder air-filled pore aperture area is with the relation of guiding valve miles of relative movement, during beginning, be gradually and increase, arrive certain position, be the position of guiding valve braking air-filled pore while overlapping with slide valve seat Kongzui large area, it is maximum that brake cylinder air-filled pore aperture area reaches, brake cylinder air-filled pore aperture area continues to move up with guiding valve and reduces afterwards, thereby change the proportional relation of guiding valve miles of relative movement and car brakeing cylinder air-filled pore area, realizing the anterior car brakeing cylinder of train aeration speed slows down, and rear portion car brakeing cylinder aeration speed is accelerated, and then before reducing in train, rear portion car brakeing cylinder difference of pressure, to improve the conformability of train front and back car brakeing cylinder aeration speed, realize and reduce heavily loaded long and big train longitudinal impulse.
Compared with prior art, the invention has the beneficial effects as follows:
1, reduce train front and rear portions car brakeing cylinder difference of pressure, improved the conformability of train front and back car brakeing cylinder aeration speed, reduced heavily loaded long and big train longitudinal impulse;
2, do not change existing train braking ability, guarantee that train braking distance is constant;
3, implementation method is simple, to original structure, changes little;
4, original structure characteristic and the stability of distributing valve do not change.
Accompanying drawing explanation
The present invention has accompanying drawing six width, wherein
Fig. 1 is the planar development schematic diagram in the pyriform hole in guiding valve braking air-filled pore and slide valve seat hole,
Fig. 2 is that guiding valve braking air-filled pore and slide valve seat hole are the guiding valve in pyriform hole and Ji Liang hole, the slide valve seat position schematic diagram while starting to overlap,
Fig. 3 is that guiding valve braking air-filled pore and slide valve seat hole are the guiding valve in pyriform hole and the schematic diagram after slide valve seat position Ji Liang hole coincidence area change,
Fig. 4 is that guiding valve braking air-filled pore and slide valve seat hole are the guiding valve in pyriform hole and Ji Liang hole, slide valve seat position schematic diagram while reaching maximum coincidence area,
Fig. 5 is guiding valve braking air-filled pore and slide valve seat hole guiding valve and slide valve seat position Ji Liang hole coincidence shape schematic diagram (two hole coincidence areas are not maximum) while being the guiding valve range in pyriform hole,
Fig. 6 is guiding valve miles of relative movement and the guiding valve braking air-filled pore area relationship schematic diagram that overlaps with slide valve seat hole.
In accompanying drawing, 1, slide valve seat, 2, slide valve seat hole, 3, guiding valve, 4, guiding valve braking air-filled pore.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described with implementing example.
The braking distributing valve in pyriform hole for heavy duty long and big train, braking distributing valve mainly comprises main valve, emergency valve, office subtracts valve and accelerates release valve, in main valve, mainly comprise guiding valve 3 and slide valve seat 1, guiding valve 3 and slide valve seat 1 are respectively equipped with guiding valve braking air-filled pore 4 and slide valve seat hole 2, guiding valve 3 coordinates and slides up and down with slide valve seat 1 in spool stroke, in non-braking position guiding valve braking air-filled pore 4 and slide valve seat hole 2 in coincidence status not mutually, in guiding valve 3 slides up and down process along slide valve seat 1, between guiding valve braking air-filled pore 4 and slide valve seat hole 2, through being disconnected to, overlapping and overlap to the process disconnecting, guiding valve braking air-filled pore 4 and slide valve seat hole 2 are pyriform holes, pyriform hole by a big hole with one above big hole and the aperture being connected with big hole form, the aperture in pyriform hole is circular hole, a kind of in elliptical aperture and slotted hole, the little hole area in pyriform hole is the 1/3-1/4 of the large hole area in pyriform hole, setting is inverted in the guiding valve braking pyriform hole of air-filled pore 4 and the pyriform hole in slide valve seat hole 2 mutually, guiding valve 3 is from guiding valve initial position along the up process that slides into 1/2-2/3 spool stroke of slide valve seat 1, the guiding valve braking big hole in pyriform hole of air-filled pore 4 and the big hole in the pyriform hole in slide valve seat hole 2 are by first all overlapping at coincident to the guiding valve braking big hole in pyriform hole of air-filled pore 4 and the big hole in the pyriform hole in slide valve seat hole 2, the area that the guiding valve braking big hole in pyriform hole of air-filled pore 4 and the big hole in the pyriform hole in slide valve seat hole 2 all overlap is guiding valve braking air-filled pore 4 and slide valve seat hole 2 coincidence area maximum areas in the up sliding process of guiding valve 3, guiding valve 3 continues to go upward to guiding valve range, the guiding valve braking big hole in pyriform hole of air-filled pore 4 and the big hole coincidence area in the pyriform hole in slide valve seat hole 2 progressively dwindle, the guiding valve braking aperture in pyriform hole of air-filled pore 4 and the aperture in the pyriform hole in slide valve seat hole start to overlap with the big hole in pyriform hole in slide valve seat hole and the big hole in the pyriform hole of guiding valve braking air-filled pore, until the guiding valve braking little bore edges in pyriform hole of air-filled pore and the big hole coincident in the pyriform hole in slide valve seat hole, the big hole coincident in the pyriform hole of the little bore edges in the pyriform hole in slide valve seat hole and guiding valve braking air-filled pore.
Embodiment
The hole shape that changes car brakeing distributing valve internal spool valve braking air-filled pore 4 and slide valve seat hole 2, other structures of distributing valve are constant.What guiding valve was braked to air-filled pore 4 and slide valve seat hole 2 is shaped as pyriform hole, and setting is inverted in two pyriform holes on slide valve seat 1 and on guiding valve 3 mutually.When two pyriform greatest circles overlap, brake cylinder air-filled pore aperture area is maximum, before reaching brake cylinder air-filled pore aperture area maximum, brake cylinder air-filled pore aperture area is with moving on guiding valve 3, brake cylinder air-filled pore aperture area increases gradually, reach after maximum area, brake cylinder air-filled pore aperture area is with moving on guiding valve 3, brake cylinder air-filled pore aperture area reduces gradually, thereby change the linear relationship of axle distribution valves internal spool valve miles of relative movement and car brakeing cylinder air-filled pore area, reach the effect that reduces heavily loaded long and big train longitudinal impulse.
Claims (3)
1. the braking distributing valve in pyriform hole for a heavily loaded long and big train, braking distributing valve mainly comprises main valve, emergency valve, office subtracts valve and accelerates release valve, in main valve, mainly comprise guiding valve (3) and slide valve seat (1), guiding valve (3) and slide valve seat (1) are respectively equipped with guiding valve braking air-filled pore (4) and slide valve seat hole (2), guiding valve (3) coordinates and slides up and down with slide valve seat (1) in spool stroke, in non-braking position guiding valve braking air-filled pore (4) and slide valve seat hole (2) in coincidence status not mutually, in guiding valve (3) slides up and down process along slide valve seat, between guiding valve braking air-filled pore (4) and slide valve seat hole (2), through being disconnected to, overlapping completely and overlap completely to the process disconnecting, it is characterized in that described guiding valve braking air-filled pore (4) and slide valve seat hole (2) are pyriform holes, pyriform hole by a big hole with one above big hole and the aperture being connected with big hole form, setting is inverted in the guiding valve braking pyriform hole of air-filled pore and the pyriform hole in slide valve seat hole mutually, guiding valve (3) is from non-braking position along slide valve seat (1) up process that slides into 1/2-2/3 spool stroke, the big hole in pyriform hole of guiding valve braking air-filled pore (4) and the big hole in the pyriform hole of slide valve seat hole (2) are by first braking the big hole in pyriform hole of air-filled pore (4) and the big hole in the pyriform hole of slide valve seat hole (2) all overlaps at coincident to guiding valve, the area that the big hole in pyriform hole of guiding valve braking air-filled pore (4) and the big hole in the pyriform hole of slide valve seat hole (2) all overlap is guiding valve braking air-filled pore (4) and slide valve seat hole (2) coincidence maximum area in the up sliding process of guiding valve (3), guiding valve (3) continues to go upward to guiding valve range, the big hole in pyriform hole of guiding valve braking air-filled pore (4) and the big hole coincidence area in the pyriform hole of slide valve seat hole (2) progressively dwindle, the aperture in pyriform hole of guiding valve braking air-filled pore (4) and the aperture in slide valve seat (2) pyriform hole start to overlap with the big hole in pyriform hole of slide valve seat hole (2) and the big hole in the pyriform hole of guiding valve braking air-filled pore (4), until the little bore edges in pyriform hole and the big hole coincident in slide valve seat pyriform hole of guiding valve braking air-filled pore, the big hole coincident in the pyriform hole of the little bore edges in slide valve seat pyriform hole and guiding valve braking air-filled pore.
2. the braking distributing valve in pyriform hole for a kind of heavily loaded long and big train according to claim 1, the aperture that it is characterized in that described pyriform hole is a kind of in circular hole, elliptical aperture and slotted hole.
3. the braking distributing valve in pyriform hole for a kind of heavily loaded long and big train according to claim 1, the little hole area that it is characterized in that described pyriform hole is the 1/3-1/4 of the big hole area in pyriform hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210149895.6A CN102700543B (en) | 2012-05-15 | 2012-05-15 | Pear-shaped hole equipped braking distribution valve for heavy-loaded long and large train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210149895.6A CN102700543B (en) | 2012-05-15 | 2012-05-15 | Pear-shaped hole equipped braking distribution valve for heavy-loaded long and large train |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102700543A CN102700543A (en) | 2012-10-03 |
| CN102700543B true CN102700543B (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210149895.6A Expired - Fee Related CN102700543B (en) | 2012-05-15 | 2012-05-15 | Pear-shaped hole equipped braking distribution valve for heavy-loaded long and large train |
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| Country | Link |
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| CN (1) | CN102700543B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115107726B (en) * | 2022-06-20 | 2023-07-11 | 眉山中车制动科技股份有限公司 | Three-pressure brake valve for controlling air pressure fluctuation of brake cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529576A1 (en) * | 1985-08-17 | 1987-02-19 | Kloeckner Humboldt Deutz Ag | Control valve, in particular an electromagnetically actuated control valve |
| CN1011498B (en) * | 1987-05-04 | 1991-02-06 | 联合-讯号有限公司 | Proportioning control valve |
| CN1359821A (en) * | 2000-06-28 | 2002-07-24 | 西屋气刹车技术股份有限公司 | Pneumatic control device and method for stage relief of brake pressure in brake system of freight train |
| CN201810818U (en) * | 2010-07-23 | 2011-04-27 | 浙江苏强格液压有限公司 | Slide valve rod for multi-way valve |
-
2012
- 2012-05-15 CN CN201210149895.6A patent/CN102700543B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529576A1 (en) * | 1985-08-17 | 1987-02-19 | Kloeckner Humboldt Deutz Ag | Control valve, in particular an electromagnetically actuated control valve |
| CN1011498B (en) * | 1987-05-04 | 1991-02-06 | 联合-讯号有限公司 | Proportioning control valve |
| CN1359821A (en) * | 2000-06-28 | 2002-07-24 | 西屋气刹车技术股份有限公司 | Pneumatic control device and method for stage relief of brake pressure in brake system of freight train |
| CN201810818U (en) * | 2010-07-23 | 2011-04-27 | 浙江苏强格液压有限公司 | Slide valve rod for multi-way valve |
Non-Patent Citations (2)
| Title |
|---|
| 重载列车纵向冲动机理及参数影响;魏伟;《大连交通大学学报》;万方;20110228;第32卷(第1期);全文 * |
| 魏伟.重载列车纵向冲动机理及参数影响.《大连交通大学学报》.万方,2011,第32卷(第1期),全文. |
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