CN102700543A - 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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- CN102700543A CN102700543A CN2012101498956A CN201210149895A CN102700543A CN 102700543 A CN102700543 A CN 102700543A CN 2012101498956 A CN2012101498956 A CN 2012101498956A CN 201210149895 A CN201210149895 A CN 201210149895A CN 102700543 A CN102700543 A CN 102700543A
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- pyriform
- valve seat
- braking
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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 the train braking technical field, relate in particular to heavily loaded long and big train braking and use distributing valve.
Background technology
The heavy duty long and big train is world's goods train developing direction, and it is the main development model of heavy haul transport that axle heavily increases, organizes into groups the quantity increase, and increasing the train marshalling list number is the modal heavy haul transport form that China adopts at present.The increase of marshalling number significantly increases train length, and train front and rear portions vehicle braked cylinder aeration speed significant difference increases, the sharp increase that brings the train longitudinal impulse thus.Excessive train longitudinal impulse not only brings the danger of hitch fracture, brings very big hidden danger to transportation safety, has aggravated the abrasion of coupler and draft gear simultaneously, reduces the service life of vehicle structure, coupler and draft gear.The heavy duty long and big train is most crucial, also be that the problem of needing solution most badly reduces the train longitudinal impulse exactly.
In the prior art; From the start with main way that reduces the train longitudinal impulse of brake system is through improving the braking propagation rate of train braking system; But; In existing railroad train brake system, improve braking propagation rate and reach capacity basically, therefore realize that through improving the train braking velocity of wave purpose that reduces the train longitudinal impulse has been difficult to reach.
The guiding valve of existing car brakeing distributing valve and the mobile relation between the slide valve seat are; When guiding valve was moved upwards up to vertex position, the slide valve seat hole just in time all overlapped with guiding valve braking air-filled pore, and the brake cylinder air-filled pore is maximum; Brake cylinder inflation this moment area is maximum, and the brake cylinder aeration speed is the fastest.The fundamental relation that moves distance and brake cylinder air-filled pore area on the guiding valve of car brakeing distributing valve is the linear relationship of direct ratio.Guiding valve miles of relative movement is relevant with train pipe decompression rate, and train pipe decompression rate is fast more, and guiding valve miles of relative movement is big more, and the brake cylinder air-filled pore is just big more, and the brake cylinder inflation is fast more.It is very fast singly to compile in the car the anterior train pipe of train decompression rate; Train rear portion train pipe decompression rate slows down; This has just caused, and anterior vehicle guiding valve miles of relative movement is long, the brake cylinder air-filled pore is big, braking potential is strong; Rear portion vehicle guiding valve miles of relative movement is short, the brake cylinder air-filled pore is little, a little less than the braking potential, the difference of each car brakeing ability has caused excessive train longitudinal impulse in the train.Existing axle distribution valves can make train produce excessive longitudinal force when service braking.In the combined train, with singly to compile car middle front part vehicle similar, similar with the rear portion vehicle of singly compiling car away from the vehicle train pipe decompression rate of locomotive, there is the big problem of train longitudinal impulse too in combined train near the vehicle train pipe decompression rate of locomotive.
Summary of the invention
The objective of the invention is problems and shortcomings to the prior art existence; A kind of train braking velocity of wave and train pipe decompression rate of not changing is provided; And keep under the train braking ability unmodified situation; Be train braking apart under the unmodified situation, realize to reduce the technology of heavily loaded long and big train longitudinal impulse.
Technical scheme of the present invention is achieved in that the braking distributing valve of a kind of heavily loaded long and big train with the pyriform hole; The braking distributing valve comprises that mainly main valve, emergency valve, office subtract valve and quicken release valve; Mainly comprise guiding valve and slide valve seat in the main valve; Guiding valve and slide valve seat are respectively equipped with guiding valve braking air-filled pore and slide valve seat hole; Guiding valve cooperates with slide valve seat in spool stroke and slides up and down; Guiding valve is in mutually not coincidence status at non-braking position guiding valve braking air-filled pore and slide valve seat hole; Slide up and down along slide valve seat in the process between guiding valve braking air-filled pore and the slide valve seat hole through being disconnected to whole coincidences and all overlapping at guiding valve to open circuited processes; It is characterized in that said guiding valve braking air-filled pore and slide valve seat hole are the pyriform holes; The pyriform hole by a big hole with one above big hole and the aperture that links to each other with big hole constitute; Setting is inverted in the pyriform hole of guiding valve braking air-filled pore and the pyriform hole in slide valve seat hole each other; Guiding valve is from non-braking position along slide valve seat the up process that slides into the 1/2-2/3 spool stroke; The big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore and the pyriform hole in slide valve seat hole is all overlapped by the big hole that overlaps on the edge of earlier to the pyriform hole in the big hole in the pyriform hole of guiding valve braking air-filled pore and slide valve seat hole, and the big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore and the pyriform hole in the slide valve seat hole all areas of coincidences is that guiding valve is braked air-filled pore and slide valve seat hole coincidence area maximum area in the up sliding process of guiding valve, and guiding valve continues to go upward to the guiding valve range; The big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore and the pyriform hole in slide valve seat hole overlaps area and progressively dwindles; The aperture in the aperture in the pyriform hole of guiding valve braking air-filled pore and the pyriform hole in slide valve seat hole begins to overlap with the big hole in the pyriform hole in slide valve seat hole and the big hole in the pyriform hole of guiding valve braking air-filled pore, brakes the big hole coincident in pyriform hole in little bore edges and slide valve seat hole in the pyriform hole of air-filled pore until guiding valve, and the little bore edges in the pyriform hole in slide valve seat hole and guiding valve are braked the big hole coincident in the pyriform hole of air-filled pore.
A kind of heavily loaded long and big train according to the invention is with the braking distributing valve in pyriform hole, and the aperture that it is characterized in that said pyriform hole is a kind of in circular hole, elliptical aperture and the slotted hole.
A kind of heavily loaded long and big train according to the invention is with the braking distributing valve in pyriform hole, and the little hole area that it is characterized in that said pyriform hole is the 1/3-1/4 of the big hole area in pyriform hole.
Principle of the present invention does;
The inflation of car brakeing cylinder mainly is to concern that according to the coincidence between slide valve seat hole and the guiding valve braking air-filled pore realizing inflating area regulates, and then realizes the adjusting of auxiliary reservoir to brake cylinder gas-filled switching tube and aeration speed.The present invention is through changing the relation of braking distributing valve internal spool valve braking air-filled pore and big coincidence area of slide valve seat Kongzui and guiding valve miles of relative movement; Change the linear relationship of direct ratio between guiding valve miles of relative movement and the 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 section is along with guiding valve miles of relative movement increases, and overlapping area increases; Second section is to increase with guiding valve miles of relative movement, overlaps area and reduces.Be when moving on guiding valve begins; Overlap area along with the proportional linear relationship of guiding valve miles of relative movement between guiding valve braking air-filled pore and the slide valve seat hole; When guiding valve is moved upwards up to 1/2-2/3 guiding valve maximum moving distance position; Realize that maximum area overlaps between guiding valve braking air-filled pore and the slide valve seat hole, at this moment brake cylinder air-filled pore maximum; When guiding valve moves up again, overlap area between guiding valve braking air-filled pore and the slide valve seat hole and reduce gradually.Be the relation of brake cylinder air-filled pore aperture area with guiding valve miles of relative movement; Being during beginning gradually increases, and arrives certain position, i.e. position when guiding valve braking air-filled pore overlaps with slide valve seat Kongzui large tracts of land; 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 changes the proportional relation of guiding valve miles of relative movement and car brakeing cylinder air-filled pore area, realizes that train front portion car brakeing cylinder aeration speed slows down; And rear portion car brakeing cylinder aeration speed is accelerated; And then reduce front and rear portions car brakeing cylinder difference of pressure in the train, to improve the conformability of train front and back car brakeing cylinder aeration speed, realize reducing heavily loaded long and big train longitudinal impulse.
Compared with prior art, the invention has the beneficial effects as follows:
1, reduces 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 the train braking distance is constant;
3, implementation method is simple, changes little to original structure;
4, the original structure characteristic and the stability of distributing valve do not change.
Description of drawings
The present invention has accompanying drawing six width of cloth, wherein
Fig. 1 is the planar development scheme drawing 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 guiding valve and slide valve seat position and two holes in the pyriform hole scheme drawings when beginning 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 scheme drawing after slide valve seat position and the increase of two holes coincidence area,
Fig. 4 is a guiding valve braking air-filled pore and the slide valve seat hole is guiding valve and slide valve seat position and two holes in pyriform hole scheme drawings when reaching maximum coincidence area,
Fig. 5 is a guiding valve braking air-filled pore with the slide valve seat hole when being the guiding valve range in pyriform hole, and guiding valve overlaps shape scheme drawing (two holes coincidence area is not a maximum) with slide valve seat position and two holes,
Fig. 6 is that guiding valve miles of relative movement overlaps the area relationship scheme drawing with guiding valve braking air-filled pore with the slide valve seat hole.
In the accompanying drawing, 1, slide valve seat, 2, the slide valve seat hole, 3, guiding valve, 4, guiding valve braking air-filled pore.
The specific embodiment
Below in conjunction with accompanying drawing and enforcement example the present invention is further specified.
The heavy duty long and big train is with the braking distributing valve in pyriform hole; The braking distributing valve comprises that mainly main valve, emergency valve, office subtract valve and quicken release valve; Mainly comprise guiding valve 3 and slide valve seat 1 in the main valve; Guiding valve 3 is respectively equipped with guiding valve braking air-filled pore 4 and slide valve seat hole 2 with slide valve seat 1; Guiding valve 3 cooperates with slide valve seat 1 in spool stroke and slides up and down; Be in mutually not coincidence status at non-braking position guiding valve braking air-filled pore 4 with slide valve seat hole 2; Slide up and down along slide valve seat 1 in the process between guiding valve braking air-filled pore 4 and the slide valve seat hole 2 at guiding valve 3 and to overlap and to overlap to open circuited process through being disconnected to; Guiding valve braking air-filled pore 4 is pyriform holes with slide valve seat hole 2; The pyriform hole by a big hole with one above big hole and the aperture that links to each other with big hole constitute; The aperture in pyriform hole is a kind of in circular hole, elliptical aperture and the slotted hole, and the little hole area in pyriform hole is the 1/3-1/4 of the big hole area in pyriform hole, and setting is inverted in the pyriform hole of guiding valve braking air-filled pore 4 and the pyriform hole in slide valve seat hole 2 each other; Guiding valve 3 is from the guiding valve initial position along slide valve seat the 1 up process that slides into the 1/2-2/3 spool stroke; The big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore 4 and the pyriform hole in slide valve seat hole 2 is all overlapped by the big hole that overlaps on the edge of earlier to the pyriform hole in the big hole in the pyriform hole of guiding valve braking air-filled pore 4 and slide valve seat hole 2, and the areas that the big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore 4 and the pyriform hole in slide valve seat hole 2 all overlaps are that guiding valve is braked air-filled pore 4 and slide valve seat hole 2 coincidence area maximum areas in the guiding valve 3 up sliding processes, and guiding valve 3 continues to go upward to the guiding valve range; The big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore 4 and the pyriform hole in slide valve seat hole 2 overlaps area and progressively dwindles; The aperture in the aperture in the pyriform hole of guiding valve braking air-filled pore 4 and the pyriform hole in slide valve seat hole begins to overlap with the big hole in the pyriform hole in slide valve seat hole and the big hole in the pyriform hole of guiding valve braking air-filled pore, brakes the big hole coincident in pyriform hole in little bore edges and slide valve seat hole in the pyriform hole of air-filled pore until guiding valve, and the little bore edges in the pyriform hole in slide valve seat hole and guiding valve are braked the big hole coincident in the pyriform hole of air-filled pore.
Embodiment
Change the hole shape in 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.Be shaped as the pyriform hole with what guiding valve was braked air-filled pore 4 and slide valve seat hole 2, on the slide valve seat 1 with guiding valve 3 on two pyriform holes be inverted setting each other.When two pyriform greatest circles overlap; Brake cylinder air-filled pore aperture area is maximum, and before reaching brake cylinder air-filled pore aperture area maximum, brake cylinder air-filled pore aperture area is with moving on the guiding valve 3; Brake cylinder air-filled pore aperture area increases gradually; After reaching maximum area, brake cylinder air-filled pore aperture area is with moving on the guiding valve 3, and 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. a heavily loaded long and big train is with the braking distributing valve in pyriform hole; The braking distributing valve comprises that mainly main valve, emergency valve, office subtract valve and quicken release valve; Mainly comprise guiding valve (3) and slide valve seat (1) in the main valve; Guiding valve (3) and slide valve seat (1) are respectively equipped with guiding valve braking air-filled pore (2) and slide valve seat hole (4); Guiding valve (3) cooperates with slide valve seat (1) in spool stroke and slides up and down; Be in mutually not coincidence status at non-braking position guiding valve braking air-filled pore (4) and slide valve seat hole (2); Slide up and down along slide valve seat in the process between guiding valve braking air-filled pore (4) and slide valve seat hole (2) through being disconnected at guiding valve (3) and to overlap fully and overlap extremely open circuited process fully; It is characterized in that said guiding valve braking air-filled pore (4) and slide valve seat hole (2) are the pyriform holes; The pyriform hole by a big hole with one above big hole and the aperture that links to each other with big hole constitute; Setting is inverted in the pyriform hole of guiding valve braking air-filled pore and the pyriform hole in slide valve seat hole each other; Guiding valve (3) is from non-braking position along slide valve seat (1) up process that slides into the 1/2-2/3 spool stroke; The big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore (4) and the pyriform hole of slide valve seat hole (2) all overlaps by overlapping earlier the big hole in pyriform hole of big hole and slide valve seat hole (2) of braking the pyriform hole of air-filled pore (4) to guiding valve on the edge of; The area that the big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore (4) and the pyriform hole of slide valve seat hole (2) all overlaps 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 the guiding valve range, and the big hole in the big hole in the pyriform hole of guiding valve braking air-filled pore (4) and the pyriform hole of slide valve seat hole (2) overlaps area and progressively dwindles, and the aperture in the pyriform hole of guiding valve braking air-filled pore (4) and the aperture in slide valve seat (2) pyriform hole begin to overlap with the big hole in the pyriform hole of slide valve seat hole (2) and the big hole that guiding valve is braked the pyriform hole of air-filled pore (4); Until the little bore edges and the big hole coincident in slide valve seat pyriform hole in the pyriform hole of guiding valve braking air-filled pore, the little bore edges in slide valve seat pyriform hole and guiding valve are braked the big hole coincident in the pyriform hole of air-filled pore.
2. according to the braking distributing valve of the said a kind of heavily loaded long and big train of claim 1 with the pyriform hole, the aperture that it is characterized in that said pyriform hole is a kind of in circular hole, elliptical aperture and the slotted hole.
3. according to the braking distributing valve of the said a kind of heavily loaded long and big train of claim 1 with the pyriform hole, the little hole area that it is characterized in that said 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 true CN102700543A (en) | 2012-10-03 |
| CN102700543B CN102700543B (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210149895.6A Active 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115107726A (en) * | 2022-06-20 | 2022-09-27 | 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)
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|---|---|---|---|---|
| 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 active Active
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 (1)
| Title |
|---|
| 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》, vol. 32, no. 1, 28 February 2011 (2011-02-28) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115107726A (en) * | 2022-06-20 | 2022-09-27 | 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 |
| 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 |
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| Publication number | Publication date |
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| CN102700543B (en) | 2014-08-13 |
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