CN206309510U - A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump - Google Patents
A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump Download PDFInfo
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- CN206309510U CN206309510U CN201720004565.6U CN201720004565U CN206309510U CN 206309510 U CN206309510 U CN 206309510U CN 201720004565 U CN201720004565 U CN 201720004565U CN 206309510 U CN206309510 U CN 206309510U
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- plunger
- oil
- matching parts
- bushing
- endoporus
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Abstract
The utility model discloses a kind of plunger matching parts of anti-leak oil-stain-preventing and using its injection pump, the plunger matching parts includes plunger bushing and plunger, the plunger bushing middle part offers endoporus, the plunger is assemblied in the endoporus of plunger bushing, the plunger in the mating surface of plunger bushing bottom together with being additionally provided with or two seals oil sealing, the hermetic oil seal is arranged in the annular groove opened up on the lower sides of the plunger bushing endoporus, and the hermetic oil seal is worked in coordination and constituted by an exterior seal ring and an interior oil-scraping ring in the annular groove together.The plunger matching parts good airproof performance, can effectively prevent interior leakage, improve lubricating condition, it is ensured that good structural behaviour, using the injection pump of above-mentioned plunger matching parts, with excellent performance, the advantage of long lifespan.
Description
Technical field
The utility model is related to diesel oil fuel system with high injection pressure field, more particularly to a kind of post of anti-leak oil-stain-preventing
Fill in couple and apply its injection pump.
Background technology
Plunger matching parts is the secondary precision pair in injection pump, due to there is radial clearance between plunger and plunger bushing, is passed
Often there is the leakage of high pressure fuel in the course of the work in system plunger matching parts.As shown in figure 1, the fuel oil of high pressure chest 5 through plunger bushing 1 with
Gap between plunger 2, low pressure oil pocket is returned to along direction shown in arrow all the way, separately has fraction fuel oil to be continued traveling downwardly along plunger 2,
Lubricant reservoir is leaked to, leakage in fuel oil is caused.Leakage easily causes lubricating oil dilution in fuel oil influences the lubricant effect of diesel engine, sternly
Movement parts ablation is caused during weight.Also, there is a problem in that and shortcoming when traditional structure is actually used：1 rigid seal structure
With the continuous improvement of high-pressure fuel oil system pressure, amount of leakage can increase；2 rigid seal structures with the increase of use time,
The abrasion aggravation of plunger pair, fit clearance is increased, and leakage rate increases, and interior leakage increases；Can be by lubricating oil during 3 plunger motions
The dirt such as aluminium skimmings bring into plunger cavity and cause plunger stuck.
Utility model content
The purpose of this utility model is to provide a kind of plunger matching parts good airproof performance of anti-leak oil-stain-preventing, can effectively prevent
Interior leakage, improves lubricating condition, it is ensured that good structural behaviour, so as to overcome existing traditional plunger matching parts to be prone to interior leakage,
Influence lubrication, and easily there is the stuck deficiency of plunger.
Another purpose of the present utility model is to provide using the injection pump of above-mentioned plunger matching parts, with excellent performance, life-span
Advantage long.
To achieve the above object, the utility model is adopted the following technical scheme that：
A kind of plunger matching parts of anti-leak oil-stain-preventing, including plunger bushing and plunger, the plunger bushing middle part offer endoporus,
The plunger is assemblied in the endoporus of plunger bushing, and the plunger in the mating surface of plunger bushing bottom together with being additionally provided with or twice are close
Oil sealing is sealed, and the hermetic oil seal is arranged in the annular groove opened up on the lower sides of the plunger bushing endoporus, described close together
Oil sealing envelope is worked in coordination and is constituted by an exterior seal ring and an interior oil-scraping ring in the annular groove.
A kind of injection pump, using the plunger matching parts of described anti-leak oil-stain-preventing.
Due to using above-mentioned technical proposal, the utility model at least has advantages below：
Due to the plunger with the mating surface of plunger bushing bottom be provided with together with or two seals oil sealing, the utility model
Leakage (interior leakage) problem of plunger matching parts is solved using oil seal structure, while being brought into during avoiding the occurrence of plunger motion
The dirts such as the aluminium skimmings in lubricating oil cause the stuck problem of plunger.
Brief description of the drawings
Above-mentioned is only the general introduction of technical solutions of the utility model, in order to better understand technology hand of the present utility model
Section, below in conjunction with accompanying drawing, the utility model is described in further detail with specific embodiment.
Fig. 1 is the oil circuit leakage schematic diagram of traditional plunger matching parts.
Fig. 2 is the structural representation of the plunger matching parts of the utility model anti-leak oil-stain-preventing.
Fig. 3 is the structural representation of two seals oil sealing.
Specific embodiment
The utility model provides a kind of plunger matching parts of anti-leak oil-stain-preventing and applies its injection pump.Such as Fig. 2 and Fig. 3
Shown, the plunger matching parts includes plunger bushing 1 and plunger 2, and the middle part of the plunger bushing 1 offers endoporus, and the plunger 2 is assemblied in
In the endoporus (i.e. plunger cavity) of plunger bushing 1, the plunger 2 in the bottom mating surface of plunger bushing 1 together with being additionally provided with or twice are close
Oil sealing envelope 3, the hermetic oil seal 3 is arranged in the annular groove opened up on the lower sides of the endoporus of the plunger bushing 1, described together
Hermetic oil seal 3 is worked in coordination and is constituted by an exterior seal ring 31 and an interior oil-scraping ring 32 in the annular groove.
Said structure offer sealing is set there is provided a kind of plunger matching parts of anti-interior leakage oil-stain-preventing.Two seals oil sealing can root
Used simultaneously according to one of only selection or twice are needed.As shown in Fig. 2,3, two seals oil sealing is used simultaneously.In post during implementation
Upper and lower twice annular groove is dug in the bottom of plug sleeve 1, and sealing ring 31 and oil-scraping ring 32, the sealing ring 31 are installed in the annular groove
Elastomeric material is used with oil-scrapping sheet 32.Wherein, sealing ring 31 is fitted and is sealed with plunger bushing 1 and oil-scraping ring 32, frizing
Ring 32 coordinates to play with plunger 2 to be prevented fuel oil from revealing in the motion process of plunger 2 and stops that the pollutant in lubricating oil enters post
Fill in the effect in chamber.Therefore, structure shown in figure is equivalent to foring in one upper diesel oil hermetic oil seal the profit together with
Oil seal oil sealing.
When plunger 2 is up, the dirts such as lubricating oil and aluminium skimmings on plunger 2 are sticked in seal oil oil sealing
Blocked under effect in outside, it is impossible to go successively to plunger cavity, it is to avoid plunger 2 is because of the entrance of dirt stuck.High pressure
The fuel oil in chamber 5 is leaked to the drain pan on plunger bushing 1 through the gap of plunger matching parts, and low pressure chamber, diesel oil sealing are returned to through drain pan
Oil sealing is arranged to bear the seal pressure of below 50Mpa, so as to effectively prevent fuel oil to be leaked to the lubricant reservoir of lower section.
To sum up, the utility model solves the problems, such as the interior leakage of plunger matching parts by hermetic oil seal structure, while avoiding out
The dirts such as the aluminium skimmings brought into lubricating oil during existing plunger motion cause the stuck problem of plunger.Due to using above-mentioned technology
Scheme, plunger matching parts good airproof performance of the present utility model can effectively prevent interior leakage, improve lubricating condition, it is ensured that good knot
Structure performance, using the injection pump of above-mentioned plunger matching parts, with excellent performance, the advantage of long lifespan.
The above, is only preferred embodiment of the present utility model, not makees any formal to the utility model
Limitation, those skilled in the art make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above,
Fall in protection domain of the present utility model.
Claims (2)
1. a kind of plunger matching parts of anti-leak oil-stain-preventing, including plunger bushing and plunger, the plunger bushing middle part offer endoporus, institute
State plunger to be assemblied in the endoporus of plunger bushing, it is characterised in that be additionally provided with one in the plunger and plunger bushing bottom mating surface
Road or two seals oil sealing, the hermetic oil seal are arranged in the annular groove opened up on the lower sides of the plunger bushing endoporus,
The hermetic oil seal is worked in coordination and is constituted by an exterior seal ring and an interior oil-scraping ring in the annular groove together.
2. a kind of injection pump, it is characterised in that using the plunger matching parts of the anti-leak oil-stain-preventing described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720004565.6U CN206309510U (en) | 2017-01-04 | 2017-01-04 | A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720004565.6U CN206309510U (en) | 2017-01-04 | 2017-01-04 | A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309510U true CN206309510U (en) | 2017-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720004565.6U Active CN206309510U (en) | 2017-01-04 | 2017-01-04 | A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump |
Country Status (1)
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| CN (1) | CN206309510U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499558A (en) * | 2017-01-04 | 2017-03-15 | 北京亚新科天纬油泵油嘴股份有限公司 | A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump |
| CN109653921A (en) * | 2018-10-30 | 2019-04-19 | 中国北方发动机研究所(天津) | A kind of injection pump plunger set of anti-plunger clamping stagnation |
-
2017
- 2017-01-04 CN CN201720004565.6U patent/CN206309510U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499558A (en) * | 2017-01-04 | 2017-03-15 | 北京亚新科天纬油泵油嘴股份有限公司 | A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump |
| CN109653921A (en) * | 2018-10-30 | 2019-04-19 | 中国北方发动机研究所(天津) | A kind of injection pump plunger set of anti-plunger clamping stagnation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180724 Address after: 300000 2 Yulong Road, automobile industrial park, Wuqing District, Tianjin Patentee after: North oil electronic control fuel injection system (Tianjin) Co., Ltd. Address before: No. 3, Cheng Zhuang Road, Fengtai District, Beijing Patentee before: Beijing Yaxin Ketianwei Oil Pume Nozzle Tip Co., Ltd. |
|
| TR01 | Transfer of patent right |