CN2415172Y - Hard alloy plunger unit for injection pump of diesel engine - Google Patents
Hard alloy plunger unit for injection pump of diesel engine Download PDFInfo
- Publication number
- CN2415172Y CN2415172Y CN 00224213 CN00224213U CN2415172Y CN 2415172 Y CN2415172 Y CN 2415172Y CN 00224213 CN00224213 CN 00224213 CN 00224213 U CN00224213 U CN 00224213U CN 2415172 Y CN2415172 Y CN 2415172Y
- Authority
- CN
- China
- Prior art keywords
- plunger
- hard alloy
- injection pump
- inlaid
- cemented carbide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a hard alloy plunger coupler for oil injection pumps of diesel engines, which comprises a plunger body and a plunger sleeve body, wherein an outer plunger sleeve made of hard alloy is inlaid outside the plunger body and an inner plunger sleeve made of hard alloy is inlaid in the plunger sleeve body. The inlaid methods are press fit, welding and bonding. The inlaid hard alloy is in a tungsten cobalt class YG or a tungsten cobalt titanium class YT and YW, the hardness of the hard alloy is not lower than HRA89. The utility model has the advantages of high hardness of the coupler, wear resistance, long service life, complete combustion of oil mist, etc.
Description
The utility model relates to a kind of use for diesel engine Injection Pump, specifically a kind of plunger and barrel assembly of diesel engine oil injection pump.
At present, it is that materials processing is made that plunger and barrel assembly of diesel engine oil injection pump all adopts the GCR15 Bearing Steel, this plunger coupled parts hardness is not high, not wear-resistant, after work a period of time, the matching gap between plunger and the plunger bushing increases, and causes Injection Pump pressure to descend, directly have influence on the oil atomizing quality, thereby oil mist combustion power incomplete and diesel engine is descended.
The purpose of this utility model provides a kind of diesel injection pump cemented carbide plunger idol part, this plunger coupled parts wear resistance is strong, matching gap between plunger and the plunger bushing is remained unchanged for a long time, thereby the power of mist of oil perfect combustion and diesel engine is remained unchanged.
The utility model is to realize its goal of the invention by the following technical solutions, a kind of diesel injection pump cemented carbide plunger idol part, it comprises plunger body and plunger bushing body, lean on an end of plunger bushing body to be provided with the plunger overcoat in plunger body, in the plunger bushing body, be provided with in the plunger bushing and overlap, cover adopts the high-strength abrasion-proof material in plunger overcoat and the plunger bushing, and the utility model adopts cemented carbide.
Because adopt above technological scheme, the utility model has ideally been realized goal of the invention, and have plunger coupled parts hardness by force, not easy to wear, long service life, oil mist combustion wait characteristics fully.
Description of drawings:
Accompanying drawing is a structural representation of the present utility model.
Below in conjunction with accompanying drawing the utility model is further described: a kind of diesel injection pump cemented carbide plunger idol part, it comprises plunger body 4, plunger bushing body 1, plunger overcoat 3 is embedded in outside the plunger body 4, cover 2 is embedded in the plunger bushing body 1 in the plunger bushing, cover 2 is the cemented carbide cover in described plunger overcoat 3 and the plunger bushing, cover 2 is W-Co kind YG or W-Co-Ti kind YT, YW cemented carbide in plunger overcoat 3 and the plunger bushing, its hardness is not less than HRA89 (the utility model is a W-Co kind YG cemented carbide, and hardness is HRA89).
It is that the way of mutual rubbing surface tungsten carbide button cover improves the hardness of friction surface and reduces friction factor that the utility model adopts working surface at plunger body and plunger bushing body, thereby improved the working life of plunger and barrel assembly of diesel engine oil injection pump exponentially and reduced fuel consume, made diesel injection pump can remain on work under the constant pressure state for a long time.Inlaying of cemented carbide cover is that the employing drive fit is press-fitted, welds or glueds joint and finish (the utility model adopts the splicing way) .Plunger body and plunger bushing body are still selected the GCR15 Bearing Steel for use is after or be not less than the GCR15 rigidity can material. plunger body and plunger bushing body carry out machining earlier; Again by heat treatment; After making heat treatment hardness be not less than Rockwell hardness HRC62; According to the technological process that is press-fitted or welds or glued joint the carbide alloy cover is embedded on plunger body and the plunger bushing body securely; Process with the processing of diamond wheel grinding or with edgm then; Carry out retrofit with the method for grinding again; Make it to reach the cooperatively interact requirement in gap of couple; And make matching surface reach minute surface; Its surface roughness should be not less than Ra0.025um
Claims (3)
1, a kind of diesel injection pump cemented carbide plunger idol part, it comprises plunger body [4], plunger bushing body [1], it is characterized in that leaning on an end of plunger bushing body [1] to be provided with plunger overcoat [3], in plunger bushing body [1], be provided with cover [2] in the plunger bushing in plunger body [4].
2, the described diesel injection pump cemented carbide of root a tree name claim 1 plunger idol part is characterized in that cover [2] is the cemented carbide cover in described plunger overcoat [3] and the plunger bushing.
3, the described diesel injection pump cemented carbide of root a tree name claim 2 plunger idol part is characterized in that in plunger overcoat [3] and the plunger bushing that cover [2] is W-Co kind YG or W-Co-Ti kind YT, YW cemented carbide, and its hardness is not less than HRA89.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00224213 CN2415172Y (en) | 2000-02-17 | 2000-02-17 | Hard alloy plunger unit for injection pump of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00224213 CN2415172Y (en) | 2000-02-17 | 2000-02-17 | Hard alloy plunger unit for injection pump of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2415172Y true CN2415172Y (en) | 2001-01-17 |
Family
ID=33588626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00224213 Expired - Fee Related CN2415172Y (en) | 2000-02-17 | 2000-02-17 | Hard alloy plunger unit for injection pump of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2415172Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269435A (en) * | 2017-07-31 | 2017-10-20 | 重庆康明斯发动机有限公司 | A kind of diesel fuel system and its electric-controlled fuel injector |
-
2000
- 2000-02-17 CN CN 00224213 patent/CN2415172Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269435A (en) * | 2017-07-31 | 2017-10-20 | 重庆康明斯发动机有限公司 | A kind of diesel fuel system and its electric-controlled fuel injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |