CN109653921A - A kind of injection pump plunger set of anti-plunger clamping stagnation - Google Patents
A kind of injection pump plunger set of anti-plunger clamping stagnation Download PDFInfo
- Publication number
- CN109653921A CN109653921A CN201811279737.6A CN201811279737A CN109653921A CN 109653921 A CN109653921 A CN 109653921A CN 201811279737 A CN201811279737 A CN 201811279737A CN 109653921 A CN109653921 A CN 109653921A
- Authority
- CN
- China
- Prior art keywords
- plunger
- diameter
- present
- injection pump
- plunger bushing
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention provides a kind of injection pump plunger sets of anti-plunger clamping stagnation, including plunger bushing ontology, the plunger bushing ontology includes the different multi-segment structure of diameter for installing the inner cavity of plunger from top to bottom, is followed successively by widened section, changeover portion, general section, the diameter of the widened section are greater than general section of diameter.Compared with the existing technology, present invention has the advantage that the present invention in plunger bushing upper design, machined certain space, the deformation of Lai Rongrang plunger bushing, make plunger matching parts under various operating conditions flexibly.
Description
Technical field
The invention belongs to oil spout pump technical fields, more particularly, to a kind of injection pump plunger set of anti-plunger clamping stagnation.
Background technique
Plunger and bare of injection pump is made of plunger 2 and plunger bushing 1, as shown in Figure 1, being the most important element of injection pump.For
Guarantee reliably to seal between plunger bushing upper surface and delivery valve seat, discharge outlet is often tightened with biggish torque, makes plunger
It puts on and bears very big assembly pressing force, cause the inner working face of plunger bushing to deform and change between plunger matching parts normally cooperates
Gap can cause plunger catching phenomenon when serious.
Summary of the invention
In view of this, the present invention is directed to propose a kind of injection pump plunger set of anti-plunger clamping stagnation, existing to solve plunger clamping stagnation
As.
The structural analysis process of plunger catching phenomenon is as follows:
To meet High speed and heavy duty diesel engine high strengthening demand, plunger bushing 1 and plunger 2 cooperate, the cooperation of the plunger matching parts
Gap has increased as 0.004~0.006mm, and form tolerance requires to be that plunger is up big and down small, and big end taper tolerance is 0.001mm；
Plunger bushing is up-small and down-big, and small end taper tolerance is 0.001mm.It is located at lower tolerance range in the gap on plunger matching parts top in this way, sees
Fig. 2.Analyzed from fit clearance and form tolerance, when plunger bushing is by assembly pressing force F, generate A to deformation, even if A to
Deformation be 0.003mm, just reach the small end of plunger bushing and the fit clearance lower limit of plunger big end, to make plunger motion extremely
When top dead center position, axial and circumferential not working is generated or the phenomenon that clamping stagnation.
By the calculating to plunger bushing stress deformation situation, the deflection at the aperture plunger bushing φ 14mm is 0.006mm,
See Fig. 3 institute, reach plunger matching parts maximum fit clearance, therefore cause plunger rotation not flexible or catching phenomenon.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of injection pump plunger set of anti-plunger clamping stagnation, including plunger bushing ontology, the plunger bushing ontology are used for mounting post
The inner cavity of plug includes the different multi-segment structure of diameter from top to bottom, is followed successively by widened section, changeover portion, general section, the widened section
Diameter be greater than general section of diameter.
Compared with the existing technology, present invention has the advantage that
The present invention in plunger bushing upper design, machined certain space, the deformation of Lai Rongrang plunger bushing makes plunger matching parts
Under various operating conditions flexibly.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is traditional plunger and bare of injection pump structure sectional view；
Fig. 2 is the force diagram of plunger and bare of injection pump；
Fig. 3 is the structure chart of the plunger bushing of the embodiment of the present invention；
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The injection pump plunger set of anti-plunger clamping stagnation, as shown in figure 3, including plunger bushing ontology, the plunger bushing ontology is used for
The inner cavity for installing plunger includes the different multi-segment structure of diameter from top to bottom, is followed successively by widened section 3, changeover portion 4, general section 5, institute
The diameter for stating widened section 3 is greater than general section 5 of diameter.
The present invention is that plunger matching parts is made flexibly, in plunger bushing upper design, to machined certain sky under various operating conditions
Between (widened section), the deformation of Lai Rongrang plunger bushing 1.
The stress deformation calculated result of plunger bushing 1 of the present invention, the deflection at the aperture plunger bushing φ 14mm are only
0.002mm。
After plunger nested structure of the present invention, in injection pump reliability rack examination in 740 hours, and with engine
There is no plunger matching parts stuck phenomenon in test, solve the problems, such as that plunger 2 is not flexible in plunger bushing 1 or clamping stagnation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of injection pump plunger set of anti-plunger clamping stagnation, it is characterised in that: including plunger bushing ontology, the plunger bushing ontology is used
From top to bottom include the different multi-segment structure of diameter in the inner cavity of installation plunger, is followed successively by widened section, changeover portion, general section, institute
The diameter for stating widened section is greater than general section of diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279737.6A CN109653921A (en) | 2018-10-30 | 2018-10-30 | A kind of injection pump plunger set of anti-plunger clamping stagnation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279737.6A CN109653921A (en) | 2018-10-30 | 2018-10-30 | A kind of injection pump plunger set of anti-plunger clamping stagnation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109653921A true CN109653921A (en) | 2019-04-19 |
Family
ID=66110480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811279737.6A Pending CN109653921A (en) | 2018-10-30 | 2018-10-30 | A kind of injection pump plunger set of anti-plunger clamping stagnation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109653921A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59221459A (en) * | 1983-05-28 | 1984-12-13 | Mitsubishi Heavy Ind Ltd | Fuel injection pump |
| CN105422346A (en) * | 2015-12-11 | 2016-03-23 | 中国北方发动机研究所(天津) | Plunger and barrel assembly for high-flow high-rotation speed rotor type high pressure common rail variable pump |
| CN205315182U (en) * | 2015-12-08 | 2016-06-15 | 重庆隆兆机械有限公司 | Plunger piston sleeve |
| CN206309510U (en) * | 2017-01-04 | 2017-07-07 | 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 |
| CN107387280A (en) * | 2017-09-12 | 2017-11-24 | 重庆潍柴发动机有限公司 | Injection pump and diesel engine |
| CN107917028A (en) * | 2016-10-10 | 2018-04-17 | 罗伯特·博世有限公司 | High-pressure plunger pump and its high potential assembly, plunger bushing |
| CN207393363U (en) * | 2017-10-20 | 2018-05-22 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
-
2018
- 2018-10-30 CN CN201811279737.6A patent/CN109653921A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59221459A (en) * | 1983-05-28 | 1984-12-13 | Mitsubishi Heavy Ind Ltd | Fuel injection pump |
| CN205315182U (en) * | 2015-12-08 | 2016-06-15 | 重庆隆兆机械有限公司 | Plunger piston sleeve |
| CN105422346A (en) * | 2015-12-11 | 2016-03-23 | 中国北方发动机研究所(天津) | Plunger and barrel assembly for high-flow high-rotation speed rotor type high pressure common rail variable pump |
| CN107917028A (en) * | 2016-10-10 | 2018-04-17 | 罗伯特·博世有限公司 | High-pressure plunger pump and its high potential assembly, plunger bushing |
| CN206309510U (en) * | 2017-01-04 | 2017-07-07 | 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 |
| CN107387280A (en) * | 2017-09-12 | 2017-11-24 | 重庆潍柴发动机有限公司 | Injection pump and diesel engine |
| CN207393363U (en) * | 2017-10-20 | 2018-05-22 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190419 |