CN206957843U - A kind of oil pump - Google Patents
A kind of oil pump Download PDFInfo
- Publication number
- CN206957843U CN206957843U CN201720816344.9U CN201720816344U CN206957843U CN 206957843 U CN206957843 U CN 206957843U CN 201720816344 U CN201720816344 U CN 201720816344U CN 206957843 U CN206957843 U CN 206957843U
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- Prior art keywords
- pump
- plunger
- spheroid
- roller
- spring
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Abstract
A kind of oil pump is the utility model is related to, belongs to engine oil mechanical field.Oil pump includes cylinder body, and described cylinder body top is provided with pump oil based part, and pump oil based part is extended in cylinder body, and the lower section of pump oil based part is provided with roller spheroid；The lower section of roller spheroid is provided with camshaft；Spring is provided between pump oil based part and roller spheroid；Described spring is iso-stress section plunger spring.Oil pump provided by the utility model changes the changing rule of its velocity of plunger, and it is improved velocity of plunger and can ensures the reliability of cam mechanism motion.When changing corresponding plunger pretravel, the average delivery rate of its plunger is improved.
Description
Technical field
A kind of oil pump is the utility model is related to, belongs to engine oil mechanical field.
Background technology
Traditional injection pump is typically used in the configuration of the high speed type such as automobile-used engineering machinery identical.The cam of traditional injection pump
Lift is small, thus velocity of plunger is low, can only increase diameter of plunger to obtain higher injection pressure.And this low plunger speed
The combination of degree and big diameter of plunger can cause leakage loss during ram compression diesel oil, and the increase of restriction loss.Big
Diameter of plunger can increase harmful volume above plunger, so as to increase the compression losses of fuel oil, that is to say, that this combination can drop
The hydraulic efficiency of low whole injection system, reduces injection pressure, its performance is further deteriorated.
Utility model content
The utility model provides a kind of oil pump for above-mentioned deficiency.
The utility model adopts the following technical scheme that：
Oil pump described in the utility model, including cylinder body, described cylinder body top are provided with pump oil based part, pump oil based part
Extend in cylinder body, the lower section of pump oil based part is provided with roller spheroid；Camshaft is provided with below roller spheroid；Pump oil based part with
Spring is provided between roller spheroid；Described spring is iso-stress section plunger spring.
Oil pump described in the utility model, iso-stress section plunger spring is provided with below pump oil based part in described cylinder
The seat of honour；The outside of roller spheroid is provided with ball seat；The top of ball seat is provided with iso-stress section plunger spring lower seat.
Oil pump described in the utility model, described cylinder body is interior to be provided with regulation tooth thick stick；The iso-stress section plunger spring seat of honour
Top is provided with regulation gear ring；Regulation tooth thick stick is connected with regulation gear ring.
Beneficial effect
Oil pump provided by the utility model changes the changing rule of its velocity of plunger, it is improved velocity of plunger
And can ensures the reliability of cam mechanism motion.When changing corresponding plunger pretravel, the average delivery rate of its plunger obtains
Improve.
The increase of cam lift can increase the maximum stress of plunger spring and stress amplitude is brought to the reliability of plunger spring
Adverse effect.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
To make the purpose of the utility model embodiment and technical scheme clearer, implement below in conjunction with the utility model
The accompanying drawing of example, the technical scheme of the utility model embodiment is clearly and completely described.Obviously, described embodiment
It is part of the embodiment of the present utility model, rather than whole embodiments.Based on described embodiment of the present utility model,
The every other embodiment that those of ordinary skill in the art are obtained on the premise of without creative work, belongs to this practicality
Novel protected scope.
As shown in the figure：A kind of oil pump, including cylinder body, described cylinder body top are provided with pump oil based part 1, pump oil based part 1
Extend in cylinder body, the lower section of pump oil based part 1 is provided with roller spheroid 3；The lower section of roller spheroid 3 is provided with camshaft 4；Pump oil system
Spring 2 is provided between part 1 and roller spheroid 3；Spring 2 is iso-stress section plunger spring.The lower section of pump oil based part 1 in cylinder
Provided with the iso-stress section plunger spring seat of honour 5；The outside of roller spheroid 3 is provided with ball seat；The top of ball seat is provided with iso-stress
Section plunger spring lower seat 6.
Oil pump described in the utility model, described cylinder body is interior to be provided with regulation tooth thick stick 7；The iso-stress section plunger spring seat of honour
5 tops are provided with regulation gear ring 8；Regulation tooth thick stick 7 is connected with regulation gear ring 8.
It is all 40cm injection pump for cylinder centre line spacing, P10 pumps cam lift is 13mm, and PZ pumps are 15mm.And PH pumps are
17mm.At the same time the changing rule of its velocity of plunger is also changed, it is improved velocity of plunger and can ensures cam
The reliability of mechanism kinematic.When changing corresponding plunger pretravel, the average delivery rate of its plunger improves 21%, so, when
PH pumps use average geometric fuel supply rate during plunger substantially identical with PZ pumps.Estimated according to hydrodynamics, the high velocity of plunger of PH pumps
The combination of the diameter of plunger of sum, the velocity of plunger low with PZ pumps and diameter of plunger, which must combine, to be compared, and its hydraulic efficiency about improves 2-
2.6 again.
Solves this problem the iso-stress section spring technological perfectionism that the utility model uses.Cut using iso-stress
After diaphragm flexures, on spring section, the shear stress that its outer rim each point is born is all identical, so the bearing capacity of material
It can be fully utilized.So as to which the pressure of spring and height is greatly decreased, so, increase in cam lift from 15mm
During 17mm, due to having used this spring, the pump housing and cam centre line to top surface distance to be reduced on the contrary from original 172mm
154mm。
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should
It is defined by scope of the claims.
Claims (3)
1. a kind of oil pump, including cylinder body, described cylinder body top is provided with pump oil based part（1）, pump oil based part（1）Extend to cylinder
In vivo, pump oil based part（1）Lower section be provided with roller spheroid（3）；Roller spheroid（3）Lower section be provided with camshaft（4）；Pump oil system
Part（1）With roller spheroid（3）Between be provided with spring（2）；It is characterized in that：Described spring（2）For iso-stress section plunger
Spring.
2. oil pump according to claim 1, it is characterised in that：Pump oil based part in described cylinder（1）Lower section be provided with etc.
The stress section plunger spring seat of honour（5）；Roller spheroid（3）Outside be provided with ball seat；The top of ball seat is cut provided with iso-stress
Seat under the plunger spring of face（6）.
3. oil pump according to claim 1 or 2, it is characterised in that：Regulation tooth thick stick is provided with described cylinder body（7）；Deng should
The power section plunger spring seat of honour（5）Top is provided with regulation gear ring（8）；Adjust tooth thick stick（7）With adjusting gear ring（8）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720816344.9U CN206957843U (en) | 2017-07-07 | 2017-07-07 | A kind of oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720816344.9U CN206957843U (en) | 2017-07-07 | 2017-07-07 | A kind of oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206957843U true CN206957843U (en) | 2018-02-02 |
Family
ID=61382827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720816344.9U Active CN206957843U (en) | 2017-07-07 | 2017-07-07 | A kind of oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206957843U (en) |
-
2017
- 2017-07-07 CN CN201720816344.9U patent/CN206957843U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |