CN101619748A - Braking cylinder of braking device of railway wagon - Google Patents
Braking cylinder of braking device of railway wagon Download PDFInfo
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- CN101619748A CN101619748A CN200910063456A CN200910063456A CN101619748A CN 101619748 A CN101619748 A CN 101619748A CN 200910063456 A CN200910063456 A CN 200910063456A CN 200910063456 A CN200910063456 A CN 200910063456A CN 101619748 A CN101619748 A CN 101619748A
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Abstract
The invention discloses a braking cylinder of a braking device of a railway wagon, which mainly solves the problem that the traditional braking cylinder has the disadvantages of large wear loss of components, poor sealing performance and poor working stability. The braking cylinder mainly comprises a cylinder body, a piston arranged in the cylinder body and a piston push rod rigidly connected with the piston together, wherein a flange elbow for air intake and air exhaust is arranged at the bottom of the cylinder body; a release spring is arranged between the piston and a cylinder cover; the upper end of the piston push rod extends out of the cylinder cover; an integral type membrane is covered on the working end surface of the piston; and a sealed space is formed between the integral type membrane and the bottom of the cylinder body, thus the braking cylinder has self-sealing performance. The braking cylinder also has the function of automatically marking the stroke of the piston of the braking cylinder by arranging stroke marks. The invention has the advantages of simple structure, good sealing effect, less wear loss, high reliability and long service life.
Description
Technical field
The present invention relates to the railway freight-car braking device, refer to a kind of master cylinder of railway freight-car braking device particularly.
Background technique
Along with the fast development of railway transport, also more and more higher to the requirement of railway freight-car braking device.Master cylinder is one of critical component of braking device, and the quality of its performance is very big to the reliability and the influence in working life of whole braking device.At present, though the principal mode master cylinder that domestic railway freight-car braking device is adopted can satisfy the requirement in working life basically, aspect reliability, still there is following defective:
One, existing brake cylinder piston rod adopts extrusion type sealed structure, piston rod rubbed with black box back and forth in when motion, not only wear away very big, sealability is relatively poor, and influences the working life of black box.Simultaneously, this structure does not have lateral flexibility.Because the foundation brake lever that is connected with master cylinder has the characteristics of circular motion, connected part can produce lateral displacement, cause piston rod directly not to be connected with the foundation brake lever, and need in piston rod, increase a push rod, link to each other indirectly with the foundation brake lever by push rod, need to leave enough gaps between push rod outer wall and the piston rod inwall like this, satisfying the requirement of foundation brake lever circular motion, thereby make the structure relative complex that becomes.
Its two, existing master cylinder piston mainly adopts the y-type seal ring sealing, and is very high to the requirement of assembling.And y-type seal ring should be realized and inboard wall of cylinder block between sealing, realize again and piston between sealing, the difficult control of sealing effect.
Its three, the inner surface of cylinder block of existing master cylinder is too smooth, cylinder fat is easy to run off on the one hand, causes the lubricating cylinders deleterious, y-type seal ring wearing and tearing aggravation, formation is sewed; The performance of its opposing foreign matter is lower on the other hand, enter the small foreign body of master cylinder, in the process of master cylinder reciprocating motion of the pistons, very easily cause inboard wall of cylinder block, seal ring scuffing or form rust deposite, sew thereby also form, finally cause the master cylinder reliability to reduce, and then reduction of service life.
Its four, whether existing piston travel meets the requirements, and needs manually to measure with chi, has so greatly restricted the working efficiency of station inspector, has prolonged row and has examined the activity duration.
Summary of the invention
Purpose of the present invention will solve above-mentioned existing in prior technology deficiency exactly, provides a kind of simple in structure, good sealing effect, abrasion loss is few, reliability is high, the master cylinder of the railway freight-car braking device of long working life.
For achieving the above object, the master cylinder of the railway freight-car braking device that the present invention is designed, mainly by cylinder body, be arranged on the piston in the cylinder body and form with the piston push rod that the piston rigidity is connected as a single entity.The bottom of cylinder body is provided with turnover gas flanged bend, is provided with release spring between piston and the cylinder cap, and stretch out outside the cylinder cap upper end of piston push rod.Its special way is: the operative end surface of piston is coated with the integrated type diaphragm, forms an airtight space between the bottom of this integrated type diaphragm and cylinder body, thereby has self-packing performance.
Further, the excircle wall of described piston is set with the support ring that is slidingly matched with cylinder body.Support ring friction and the abrasion that can effectively avoid piston and inboard wall of cylinder block are set, significantly prolong the working life of piston and cylinder body.Simultaneously, support ring is simple in structure, assembling is easy, is convenient to timely replacing after the wearing and tearing, can significantly reduce the whole cost of master cylinder.
Further, be processed with the corrugated stria on the internal face of described cylinder body.Being provided with of corrugated stria can effectively stop cylinder fat to run off, and contains the fine particle dust, thereby improves the greasy property and the anti-foreign matter performance of cylinder body, reduces the wearing and tearing between the moving element, guarantees that the moving element working stability is reliable.
Again further, be provided with the flexible annular dust-proof cover between described piston push rod and the cylinder cap, the interior ring limit of described flexible annular dust-proof cover is fixedly set on the shaft of piston push rod, and the outer annular edge of described flexible annular dust-proof cover is fixedly mounted on the cylinder cap.The flexible annular dust-proof cover can stretch with the to-and-fro motion of piston push rod, effectively eliminated the drawback that conventional piston bar and black box rub back and forth, and the intermediate throughholes that can guarantee cylinder cap is isolated from the outside all the time, thereby prevents that effectively dust granules is to the infringement in the cylinder body.
The main advantage of the present invention is: designed integrated type diaphragm at the pistons work end face has replaced traditional Y type annular seal ring, and not only it is simple in structure, assembling is easy, and large-area diaphragm has more reliable and stable selfsealings performance.Like this, the accuracy of manufacturing of piston is required and can correspondingly reduce, also be easy to guarantee the performance after the whole assembling of master cylinder, thereby can effectively reduce the abrasion between piston and the cylinder body, improve the master cylinder reliability of operation, prolong the operating life of master cylinder.Simultaneously, owing to adopt piston and piston push rod rigidity integral structure, have auto-reset function, help the alleviation of railway freight-car brake beam at the effect lower piston push rod of release spring.
Description of drawings
Fig. 1 is a kind of form structure schematic representation of master cylinder of railway freight-car braking device;
Sectional structure schematic representation when Fig. 2 is in braking state for master cylinder shown in Figure 1;
Sectional structure schematic representation when Fig. 3 is in relieved state for master cylinder shown in Figure 1.
Embodiment
Below in conjunction with the drawings and specific embodiments master cylinder of the present invention is described in further detail:
The master cylinder of the railway freight-car braking device shown in the figure comprises cylinder body 12 and cylinder cap 9, and cylinder body 12 and cylinder cap 9 can be selected stainless steel for use, to improve its decay resistance and working life.Cylinder body 12 adopts spinning process to make, and is fixedly mounted on the cylinder seat 2.Cylinder cap 9 is by bolt assembly 3, liner 10 fastening being installed on the cylinder body 12.Be connected to turnover gas flanged bend 5 at the bottom of cylinder body 12 face down bonding, be provided with dust filter net 4 in the turnover gas flanged bend 5, can prevent that the dust in air particle is inhaled in the cylinder body 12.Opposite side is provided with pipe joint 17 in the bottom of cylinder body 12, is used for the setting pressure table and measures in-cylinder pressure, and pipe joint 17 usefulness screw plugs 16 are sealed during proper functioning.Be provided with filter dirt cover 21 at pore place, the top of cylinder cap 9, be used to stop the dust in air particle to suck equally, guarantee that cylinder body 12 is inner clean.
Piston 13 and piston push rod 1 are arranged in the cylinder body 12.Piston 13 adopts casting aluminium material, but weight reduction.The lower end of piston push rod 1 is fixed with one by bolt 18 and piston 13 rigidity, and stretch out outside the cylinder cap 9 upper end of piston push rod 1, is used for linking to each other with the foundation brake lever.Be provided with release spring 11 between piston 13 and cylinder cap 9, release spring 11 applies pressure towards cylinder body 12 bottoms to piston 13 all the time.Operative end surface at piston 13 is coated with integrated type diaphragm 15, and integrated type diaphragm 15 can fit into one by the operative end surface of mode such as chimeric, bonding or bolton and piston 13, airtight space of formation between the bottom of final and cylinder body 12.
Preferred integrated type diaphragm 15 is disc-shaped structure, and the operative end surface shape of piston 13 is corresponding with it, and both can nestedly fit into one.Dish wall inboard at disc integrated type diaphragm 15 is provided with annular flange flange 15.1, is provided with annular flange flange 15.1 in the side of the operative end surface of piston 13 and inlays the annular groove 13.1 that cooperates, and can make both applyings more tight and firm like this.Lip limit 15.2 preferred design of disc integrated type diaphragm 15 are inverted U, and it can radially stretch under compressed-air actuated effect and be adjacent to cylinder body 12 inwalls like this, thereby formed seal space is more reliable and more stable.
Excircle wall at piston 13 is nested with the support ring 14 that is slidingly matched with cylinder body 12, support ring 14 adopts nylon material to make, it intercepts between piston 13 and cylinder body 12, can either prevent that piston 13 and cylinder body 12 from direct friction taking place, can significantly alleviate abrasion again to piston 13 and cylinder body 12, also easily assembling and replacing, thereby operating life cost-saved, that prolong master cylinder.On the internal face of cylinder body 12, be processed with the corrugated stria,, further improve the reliability of master cylinder in order to improve the greasy property and the anti-foreign matter performance of cylinder body 12.
Also be provided with flexible annular dust-proof cover 19 between piston push rod 1 and cylinder cap 9, the interior ring limit of flexible annular dust-proof cover 19 fixedly is nested on the shaft of piston push rod 1, with piston push rod 1 to-and-fro motion; The outer annular edge of flexible annular dust-proof cover 19 is fixedly mounted on the center hole inboard of cylinder cap 9 by screw 8, trim ring 20.Like this,, both can play preventing that dust granules from entering the effect of cylinder body 12, can not cause the wearing and tearing of piston push rod 1 again as not having fricting movement between the flexible annular dust-proof cover 19 of closed component and the piston push rod 1.
Upper end at piston push rod 1 also is fixedly connected with stroke direction board 7, top at cylinder cap 9 is installed with stroke sign 6 by screw 8, stroke sign 6 is used with stroke direction board 7, can be in time intuitively brake monitoring cylinder piston stroke whether meet the requirements.
Working principle of the present invention is as follows: during car brakeing, pressurized air passes dust filter net 4 and is entered in the cylinder body 12 by turnover gas flanged bend 5, force the lip limit 15.2 of integrated type diaphragm 15 radially to be stretched and be adjacent to cylinder body 12 inwalls, form a seal space in cylinder body 12 bottoms; After pressurized air reaches certain pressure, promote piston 13 along cylinder body 12 longitudinal movements, compression release spring 11 also drives also longitudinal movement of piston push rod 1, and piston push rod 1 promotes the foundation brake lever again, forces train deceleration.In this simultaneously, can by stroke identify 6 and stroke direction board 7 observe the stroke of master cylinder.When alleviating braking, pressurized air is discharged through turnover gas flanged bend 5, under the elastic force effect of release spring 11, and piston 13 and piston push rod 1 returning position, the foundation brake lever unclamps.
Claims (10)
1. the master cylinder of a railway freight-car braking device, comprise cylinder body (12), be arranged on the piston (13) in the cylinder body (12), and the piston push rod (1) that is connected as a single entity with piston (13) rigidity, the bottom of cylinder body (12) is provided with turnover gas flanged bend (5), be provided with release spring (11) between piston (13) and the cylinder cap (9), stretch out outside the cylinder cap (9) upper end of piston push rod (1), it is characterized in that: the operative end surface of described piston (13) is coated with integrated type diaphragm (15), forms an airtight space between the bottom of described integrated type diaphragm (15) and cylinder body (12).
2. the master cylinder of railway freight-car braking device according to claim 1 is characterized in that: described integrated type diaphragm (15) is disc-shaped structure, is nested on the operative end surface of the piston corresponding with its shape (13).
3. the master cylinder of railway freight-car braking device according to claim 2, it is characterized in that: the dish wall inboard of described integrated type diaphragm (15) is provided with annular flange flange (15.1), and the side of the operative end surface of described piston (13) is provided with described annular flange flange (15.1) inlays the annular groove (13.1) that cooperates.
4. according to the master cylinder of claim 1 or 2 or 3 described railway freight-car braking device, it is characterized in that: the lip limit (15.2) of described integrated type diaphragm (15) is inverted U.
5. according to the master cylinder of claim 1 or 2 or 3 described railway freight-car braking device, it is characterized in that: the excircle wall of described piston (13) is set with the support ring (14) that is slidingly matched with cylinder body (12).
6. the master cylinder of railway freight-car braking device according to claim 4 is characterized in that: the excircle wall of described piston (13) is set with the support ring (14) that is slidingly matched with cylinder body (12).
7. according to the master cylinder of claim 1 or 2 or 3 described railway freight-car braking device, it is characterized in that: be processed with the corrugated stria on the internal face of described cylinder body (12).
8. according to the master cylinder of claim 1 or 2 or 3 described railway freight-car braking device, it is characterized in that: be provided with flexible annular dust-proof cover (19) between described piston push rod (1) and the cylinder cap (9), the interior ring limit of described flexible annular dust-proof cover (19) is fixedly set on the shaft of piston push rod (1), and the outer annular edge of described flexible annular dust-proof cover (19) is fixedly mounted on the cylinder cap (9).
9. according to the master cylinder of claim 1 or 2 or 3 described railway freight-car braking device, it is characterized in that: the upper end of described piston push rod (1) is connected with stroke direction board (7), and the roof anchorage of described cylinder cap (9) has the stroke sign (6) that is used with described stroke direction board (7).
10. according to the master cylinder of claim 1 or 2 or 3 described railway freight-car braking device, it is characterized in that: be provided with dust filter net (4) in the described turnover gas flanged bend (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910063456A CN101619748A (en) | 2009-07-31 | 2009-07-31 | Braking cylinder of braking device of railway wagon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910063456A CN101619748A (en) | 2009-07-31 | 2009-07-31 | Braking cylinder of braking device of railway wagon |
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| Publication Number | Publication Date |
|---|---|
| CN101619748A true CN101619748A (en) | 2010-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910063456A Pending CN101619748A (en) | 2009-07-31 | 2009-07-31 | Braking cylinder of braking device of railway wagon |
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| CN (1) | CN101619748A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996690A (en) * | 2012-12-18 | 2013-03-27 | 南车长江车辆有限公司 | Mechanical interlocking type parking brake for railway vehicle |
| CN103352942A (en) * | 2013-07-19 | 2013-10-16 | 四川制动科技股份有限公司 | Railway wagon brake cylinder |
| CN103629276A (en) * | 2013-12-03 | 2014-03-12 | 四川制动科技股份有限公司 | Impeller type active lubrication brake cylinder |
| CN105804991A (en) * | 2016-05-19 | 2016-07-27 | 江苏凌特精密机械销售有限公司 | Acid-resistant and pressure-resistant water pump cylinder cover |
| CN108662048A (en) * | 2018-08-13 | 2018-10-16 | 眉山中车制动科技股份有限公司 | A kind of retaining mechanism |
| CN113200143A (en) * | 2021-05-31 | 2021-08-03 | 中国商用飞机有限责任公司 | Brake actuator and aircraft braking system |
-
2009
- 2009-07-31 CN CN200910063456A patent/CN101619748A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996690A (en) * | 2012-12-18 | 2013-03-27 | 南车长江车辆有限公司 | Mechanical interlocking type parking brake for railway vehicle |
| CN102996690B (en) * | 2012-12-18 | 2014-10-29 | 南车长江车辆有限公司 | Mechanical interlocking type parking brake for railway vehicle |
| CN103352942A (en) * | 2013-07-19 | 2013-10-16 | 四川制动科技股份有限公司 | Railway wagon brake cylinder |
| CN103629276A (en) * | 2013-12-03 | 2014-03-12 | 四川制动科技股份有限公司 | Impeller type active lubrication brake cylinder |
| CN103629276B (en) * | 2013-12-03 | 2015-11-18 | 四川制动科技股份有限公司 | A kind of impeller type active lubrication brake cylinder |
| CN105804991A (en) * | 2016-05-19 | 2016-07-27 | 江苏凌特精密机械销售有限公司 | Acid-resistant and pressure-resistant water pump cylinder cover |
| CN108662048A (en) * | 2018-08-13 | 2018-10-16 | 眉山中车制动科技股份有限公司 | A kind of retaining mechanism |
| CN108662048B (en) * | 2018-08-13 | 2023-07-04 | 眉山中车制动科技股份有限公司 | Locking mechanism |
| CN113200143A (en) * | 2021-05-31 | 2021-08-03 | 中国商用飞机有限责任公司 | Brake actuator and aircraft braking system |
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Open date: 20100106 |