CN208331736U - A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and anti-clamping stagnation - Google Patents
A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and anti-clamping stagnation Download PDFInfo
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- CN208331736U CN208331736U CN201820781692.1U CN201820781692U CN208331736U CN 208331736 U CN208331736 U CN 208331736U CN 201820781692 U CN201820781692 U CN 201820781692U CN 208331736 U CN208331736 U CN 208331736U
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- plunger
- limiting valve
- pressure
- clamping stagnation
- valve opening
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Abstract
The utility model relates to lubricating system of IC engine, relate in particular to the engine oil pump pressure-limiting valve of a kind of pressure limiting valve plunger and anti-clamping stagnation.The utility model provides a kind of pressure limiting valve plunger, while providing a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation using the plunger, can be avoided impurity accumulation, reduces the risk of clamping stagnation between plunger and valve opening during moving axially.Pressure limiting valve plunger is that leading portion diameter is small, the big structure of back segment diameter.And back segment and valve opening cooperation that diameter is big, there are larger gaps with valve opening for the small leading portion of diameter, when pump discharge oil pressure reaches the cracking pressure of design, ram compression spring opens pressure limiting valve directly, the mobile a distance of the end face axial of plunger closed end, oil liquid flows to drain tap by the gap between plunger and step surface, and impurity is made to be not easy to accumulate, and reduces the risk of clamping stagnation between plunger and valve opening during moving axially.
Description
Technical field
The utility model relates to lubricating system of IC engine, relate in particular to the machine oil of a kind of pressure limiting valve plunger and anti-clamping stagnation
Pump pressure limiting valve.
Background technique
Lubricating oil pump is component important in lubricating system, and function is that the machine of enough pressure and flow is provided for lubricating system
Oil, oil pressure must assure that in a certain range, to guarantee that each friction member is adequately lubricated and do not damage correlation
Pressure part.
Engine oil pump pressure-limiting valve plays control oil flow rate in lubricating oil pump operational process, adjusts the work of engine oil pressure size
With.And traditional engine oil pump pressure-limiting valve uses the plunger of cylindrical structure, the outer diameter of plunger is consistent, the circumference and valve opening of entire plunger
Cooperate between inner wall for small―gap suture.When lubricating oil pump outlet oil pressure reaches the cracking pressure of design, plunger radial movement compresses bullet
Spring to open position, pressure limiting valve starts draining.
In the actual use process, engine oil pump pressure-limiting valve has the disadvantage that 1, plunger circumferential surface there are sharp edge hairs
Thorn；2, valve opening residual machining aluminium skimmings；3, contain impurity in machine oil.These situations can make plunger circumferential surface and hole wall card
Stagnant risk, plunger can not be successfully axial movement, cause engine oil pump pressure-limiting valve cannot it is normally-open or close, cause machine oil to pump out
Mouth oil pressure control lag or the ability for reducing plunger oil sealing, the reliability of extreme influence engine lubrication system work.Or even by
It can not be closed in plunger clamping stagnation, pump discharge machine oil is caused all to release, engine sprue is unlubricated and burns to death.
Utility model content
The purpose of the utility model is to provide a kind of pressure limiting valve plungers, while providing a kind of anti-clamping stagnation using the plunger
Engine oil pump pressure-limiting valve can be avoided impurity accumulation, reduce the risk of clamping stagnation between plunger and valve opening during moving axially.
To achieve the above object, technical solution of the utility model about a kind of pressure limiting valve plunger:
A kind of pressure limiting valve plunger, cylindrical structure generally closed at one end, the cylindrical structure are divided into according to outer diameter difference
Two sections, wherein being leading portion close to closed end, another section is back segment, and the outer diameter of the leading portion is less than the outer diameter of back segment.
Preferably, the end face of the closed end is plane.
Preferably, the junction of the end face of the closed end and cylinder periphery forms plunger chamfering.
Preferably, plunger leading portion side wall is equipped with gas vent.
Technical solution of the utility model about a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation:
A kind of engine oil pump pressure-limiting valve of anti-clamping stagnation, plunger are cylindrical structure closed at one end, and the cylindrical structure is according to outer diameter
Difference is divided into two sections, wherein being leading portion close to closed end, another section is back segment, and the outer diameter of leading portion is less than the outer diameter of back segment；Into
The diameter of hydraulic fluid port is less than the diameter of valve opening, and the junction between oil inlet and valve opening forms a cricoid step surface；After plunger
Cooperate between section and valve opening inner wall for small―gap suture.
Preferably, the end face of the plunger closed end is plane.
Preferably, the junction of the end face of the plunger closed end and cylinder periphery forms plunger chamfering, the step surface
Match with the structure of plunger chamfering.
Preferably, the side wall of the plunger leading portion is equipped with gas vent.
Preferably, the drain tap is positioned close to the position of step surface.
Specifically, pressure limiting valve plunger is that leading portion diameter is small, and the big structure of back segment diameter, the big back segment of diameter is matched with valve opening
Close, thus play guiding role, prevent plunger in valve opening deflection and cause clamping stagnation, and ensure that pressure limiting valve close shape
When state, peripheral part of plunger closed end end face can be flat and fit with step surface, keep the oil sealing of pressure limiting valve when closed more reliable.
The outer diameter of plunger leading portion is less than the outer diameter of back segment, thus forms larger gap with valve opening, fine impurities is avoided to accumulate.Moreover,
Since there are larger gaps between plunger leading portion and valve opening inner wall, when lubricating oil pump outlet oil pressure reaches the cracking pressure of design,
Oil pressure only needs that plunger is pushed slightly to move a bit in valve opening, oil inlet and drain tap can be made to communicate, pressure limiting valve starts to let out
Oil, after lubricating oil pump outlet oil pressure restores normal, plunger distance very short to step surface movement under the elastic force effect of spring, just
Pressure limiting valve can be made to close, and the distance that plunger moves axially in valve opening is shorter, the risk for clamping stagnation occur is lower.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pressure limiting valve plunger in the utility model embodiment 1；
Fig. 2 is the schematic diagram that pressure limiting valve is in close state in the utility model embodiment 2；
Fig. 3 is the schematic diagram that pressure limiting valve is in the open state in the utility model embodiment 2；
Fig. 4 is the structural schematic diagram of pressure limiting valve plunger in the utility model embodiment 3；
Fig. 5 is the schematic diagram that pressure limiting valve is in close state in the utility model embodiment 4；
Fig. 6 is the schematic diagram that pressure limiting valve is in the open state in the utility model embodiment 4；
Appended drawing reference are as follows:
1 --- plunger 101 --- plunger leading portion 102 --- plunger back segment
2 --- valve opening 3 --- spring 4 --- drain taps
5 --- plunger chamfering 6 --- step surface 7 --- oil inlets
8 --- gas vent 9 --- end face 10 of closed end --- plug screws.
Specific embodiment
For the ease of the understanding of those skilled in the art, the utility model is made below with reference to embodiment and attached drawing further
Explanation, the content that embodiment refers to not is restriction to the utility model.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom", "inner", "outside" is orientation shown in the drawings or position
Relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise specified and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the company being also possible to inside two elements
It is logical, it can be directly connected, can also indirectly connected through an intermediary, for the ordinary skill in the art, it can
To understand the concrete meaning of the term as the case may be.
Embodiment 1
As shown in Figure 1, a kind of pressure limiting valve plunger, cylindrical structure generally closed at one end, the cylindrical structure is according to outer
Diameter difference is divided into two sections, wherein being leading portion 101 close to closed end, another section is back segment 102, after the outer diameter of leading portion 101 is less than
The outer diameter of section 102；The end face 9 of closed end is plane；101 side wall of plunger leading portion is equipped with gas vent 8.
Embodiment 2
As shown in Figure 1 to Figure 3, a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation, including valve opening 2, plunger 1, oil inlet 7, draining
Mouth 4, spring 3, plug screw 10,1 structure of plunger is identical as the piston structure in embodiment 1, and plunger 1 and the cooperation of valve opening 2 are slided, plunger
2 inner wall of back segment 102 and valve opening between have small―gap suture；Valve opening 2 is communicated with oil inlet 7, and the diameter of oil inlet 7 is less than valve opening 2
Diameter, and junction between oil inlet 7 and valve opening 2 forms a cricoid step surface 6, and drain tap 4 is arranged close to
The position of step surface 6.
Specifically, pressure limiting valve plunger is that 101 diameter of leading portion is small, the big structure of 102 diameter of back segment.And the back segment that diameter is big
102 cooperate with valve opening 2, can play a part of guide section, and can prevent 1 deflection of plunger, guarantee plunger 1 and valve opening 2
Oil sealing；And there are larger gaps with valve opening 2 for the small leading portion 101 of diameter, when pump discharge oil pressure reaches the cracking pressure of design,
1 compressed spring 3 of plunger opens pressure limiting valve directly, and the end face 9 of plunger closed end moves axially a distance, and oil liquid passes through plunger
Gap between 1 and valve opening 2 flows to drain tap, and impurity is made to be not easy to accumulate, and reduces during moving axially between plunger and valve opening
The risk of clamping stagnation.
Embodiment 3
As shown in figure 4, a kind of pressure limiting valve plunger, is cylindrical structure closed at one end, the cylindrical structure is according to outer diameter difference
It is divided into two sections, wherein being leading portion 101 close to closed end, another section is back segment 102, and the outer diameter of the leading portion 101 is less than back segment
102 outer diameter；The end face 9 of closed end is plane, and the end face 9 of closed end and the junction of cylinder periphery form plunger chamfering 5；Column
It fills in 101 side wall of leading portion and is equipped with gas vent 8.
Embodiment 4
As shown in Figures 4 to 6, a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation, including valve opening 2, plunger 1, oil inlet 7, draining
Mouth 4, spring 3, plug screw 10,1 structure of plunger is identical as the piston structure of embodiment 1, and valve plunger 1 and the cooperation of valve opening 2 are slided, plunger
2 inner wall of back segment 102 and valve opening between have small―gap suture；Valve opening 2 is communicated with oil inlet 7, and the diameter of oil inlet 7 is less than valve opening 2
Diameter, junction between oil inlet 7 and valve opening 2 forms a cricoid step surface 6；Step surface 6 and 5 structure of plunger chamfering
Match, drain tap 4 is arranged close to the position of step surface 6.
Specifically, pressure limiting valve plunger is that 101 diameter of leading portion is small, the big structure of 102 diameter of back segment.And the back segment that diameter is big
102 cooperate with valve opening 2, can play a part of guide section, and can prevent 1 deflection of plunger, guarantee plunger 1 and valve opening 2
Oil sealing；And there are larger gaps with valve opening 2 for the small leading portion 101 of diameter, when pump discharge oil pressure reaches the cracking pressure of design,
1 compressed spring 3 of plunger opens pressure limiting valve directly, and the mobile a distance of the end face axial of closed end, oil liquid passes through plunger chamfering 5
Gap between step surface 6 flows to drain tap, and impurity is made to be not easy to accumulate, and reduces during moving axially between plunger and valve opening
The risk of clamping stagnation.
Above-described embodiment is the preferable implementation of the utility model, and in addition to this, the utility model can be with other sides
Formula realizes that any obvious replacement is in the protection model of the utility model under the premise of not departing from the technical program design
Within enclosing.
In order to allow those of ordinary skill in the art more easily understand the improvement of the utility model compared with the existing technology it
Place, some attached drawings of the utility model and description have been simplified, and for the sake of clarity, present specification is omitted one
A little other elements, the element that those of ordinary skill in the art should be aware that these are omitted also may make up the interior of the utility model
Hold.
Claims (9)
1. a kind of pressure limiting valve plunger, it is characterised in that: the plunger (1) is cylindrical structure closed at one end, the cylindrical structure root
It is divided into two sections according to outer diameter difference, wherein being leading portion (101) close to closed end, another section is back segment (102), the leading portion
(101) outer diameter is less than the outer diameter of back segment (102).
2. a kind of pressure limiting valve plunger according to claim 1, it is characterised in that: the end face (9) of the closed end is plane.
3. a kind of pressure limiting valve plunger according to claim 2, it is characterised in that: the end face (9) of the closed end and cylinder
The junction of periphery forms chamfering (5).
4. a kind of pressure limiting valve plunger according to claim 1, it is characterised in that: plunger leading portion (101) side wall is equipped with
Gas vent (8).
5. a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation, including valve opening (2), plunger (1), oil inlet (7), drain tap (4), spring
(3), plug screw (10), it is characterised in that: the plunger (1) be cylindrical structure closed at one end, the cylindrical structure according to outer diameter not
With being divided into two sections, wherein being leading portion (101) close to closed end, another section is back segment (102), the outer diameter of the leading portion (101)
Less than the outer diameter of back segment (102)；The diameter of the oil inlet (7) is less than the diameter of valve opening (2), the oil inlet (7) and valve opening
(2) junction between forms a cricoid step surface (6)；It is small between the plunger back segment (102) and valve opening (2) inner wall
Clearance fit.
6. a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5, it is characterised in that: plunger (1) closing
The end face (9) at end is plane.
7. a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5, it is characterised in that: plunger (1) closing
The end face (9) at end and the junction of cylinder periphery form plunger chamfering (5), the structure of the step surface (6) and plunger chamfering (5)
Match.
8. a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5, it is characterised in that: the plunger leading portion
(101) side wall is equipped with gas vent (8).
9. a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5, it is characterised in that: the drain tap (4) sets
It sets in the position close to step surface (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820781692.1U CN208331736U (en) | 2018-05-24 | 2018-05-24 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and anti-clamping stagnation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820781692.1U CN208331736U (en) | 2018-05-24 | 2018-05-24 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and anti-clamping stagnation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208331736U true CN208331736U (en) | 2019-01-04 |
Family
ID=64775156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820781692.1U Active CN208331736U (en) | 2018-05-24 | 2018-05-24 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and anti-clamping stagnation |
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| CN (1) | CN208331736U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386701A (en) * | 2018-05-24 | 2018-08-10 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and anti-clamping stagnation |
-
2018
- 2018-05-24 CN CN201820781692.1U patent/CN208331736U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386701A (en) * | 2018-05-24 | 2018-08-10 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and anti-clamping stagnation |
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