CN208331745U - A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and the anti-clamping stagnation comprising above-mentioned plunger - Google Patents
A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and the anti-clamping stagnation comprising above-mentioned plunger Download PDFInfo
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- CN208331745U CN208331745U CN201820782756.XU CN201820782756U CN208331745U CN 208331745 U CN208331745 U CN 208331745U CN 201820782756 U CN201820782756 U CN 201820782756U CN 208331745 U CN208331745 U CN 208331745U
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- plunger
- outer diameter
- limiting valve
- closed end
- leading portion
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Abstract
The utility model belongs to lubricating system of IC engine, a kind of engine oil pump pressure-limiting valve of the anti-clamping stagnation more particularly to pressure limiting valve plunger and comprising above-mentioned plunger.A kind of pressure limiting valve plunger, the plunger is cylindrical structure closed at one end, the cylindrical structure can be divided into two sections by the difference of outer diameter, wherein one section close to closed end is leading portion, another section is back segment, the outer diameter of the leading portion is less than the outer diameter of the back segment, and the leading portion is equipped with the outside boss of a circle close to the position of closed end, and the outer diameter of the boss is equal with the outer diameter of the back segment.The utility model additionally provides a kind of improved engine oil pump pressure-limiting valve, and main improvement is to use above-mentioned piston structure.The utility model can prevent plunger in valve opening deflection and cause clamping stagnation, and when ensure that pressure limiting valve in off position, peripheral part of plunger closed end end face can be flat and fit with step surface, keep oil sealing more reliable.
Description
Technical field
The utility model belongs to lubricating system of IC engine, more particularly to a kind of pressure limiting valve plunger and a kind of improved machine
Oil 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 including valve opening and the plunger, spring and the plug screw that are mounted in valve opening.The plunger of traditional engine oil pump pressure-limiting valve mostly uses one end
Closed cylindrical structure cooperates between the periphery of plunger and the hole wall of valve opening for small―gap suture.When lubricating oil pump outlet oil pressure reaches
When the cracking pressure of design, oil pressure pushes plunger axial movement compressed spring to open position, and pressure limiting valve starts draining.
In the actual use process, engine oil pump pressure-limiting valve has the disadvantage that the periphery of 1, plunger there are sharp edge hairs
Thorn；2, residual machining aluminium skimmings on valve opening hole wall；3, contain impurity in machine oil.These situations be all easy to make the periphery of plunger with
Occur the risk of clamping stagnation between the hole wall of valve opening, plunger is made to can not be successfully axial movement, causes engine oil pump pressure-limiting valve normal
It opens or closes, cause lubricating oil pump outlet oil pressure control lag or reduces the ability of plunger oil sealing, extreme influence engine lubrication
The reliability of system work, it is serious or even can not be closed due to plunger clamping stagnation, cause pump discharge machine oil all to release, starts
Owner's runner is unlubricated and burns to death.
Utility model content
The purpose of the utility model is to provide a kind of pressure limiting valve plunger and a kind of lubricating oil pump limits using this plunger
Pressure valve reduces and occurs the risk of clamping stagnation during plunger moves axially.
To achieve the above object, the utility model is about the technical solution of plunger: a kind of pressure limiting valve plunger, the plunger
For cylindrical structure closed at one end, which can be divided into two sections by the difference of outer diameter, wherein one section close to closed end is
Leading portion, another section is back segment, and the outer diameter of the leading portion is less than the outer diameter of the back segment, and the leading portion is set close to the position of closed end
The boss for having a circle outside, the outer diameter of the boss are equal with the outer diameter of the back segment.
Preferably, the end face of the closed end is plane.
Preferably, the end face of the closed end and cylinder periphery junction are set as chamfering, make the section of entire closed end
For frustum cone structure.
Further, the side wall of the leading portion is equipped with gas vent.
The utility model is about the technical solution of pressure limiting valve: a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation, including valve body, institute
Valve body is stated equipped with valve opening, the hole wall of the valve opening is equipped with drain tap, and one end of the valve opening is connected with oil inlet, it is described into
The internal diameter of hydraulic fluid port is less than the internal diameter of the valve opening, one cricoid step of junction formation of the oil inlet and the valve opening
Face, plunger and spring are sequentially installed in the valve opening inside-out, and the plunger is cylindrical structure closed at one end, the cylinder
Structure can be divided into two sections by the difference of outer diameter, wherein being leading portion close to one section of closed end, another section is back segment, the leading portion
Outer diameter is less than the outer diameter of the back segment, and the leading portion is equipped with the outside boss of a circle close to the position of closed end, the boss
Outer diameter is equal with the outer diameter of the back segment；The hole wall of the plunger back segment and the boss and the valve opening is small―gap suture cooperation.
Preferably, the drain tap is located proximate to the step surface.
Preferably, the step surface is in contact with peripheral part of the closed end end face, the step surface and the envelope
The end face of closed end is plane.
Preferably, the end face of the closed end and cylinder periphery junction are set as chamfering, make the section of entire closed end
For frustum cone structure；The step surface is inclined-plane, and tilt angle can make the step surface and the chamfering of the closed end fit.
Preferably, the side wall of the leading portion is equipped with gas vent.
The beneficial effects of the utility model are: since the back segment of plunger and the outer diameter of leading portion boss are equal, plunger back segment and
The periphery of boss and the hole wall of valve opening are small―gap suture cooperation, thus play guiding role, prevent plunger deflection in valve opening
And causing clamping stagnation, and when ensure that pressure limiting valve in off position, peripheral part of plunger closed end end face can be flat with step surface
Whole fitting keeps oil sealing 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, keeps away
Exempt from fine impurities accumulation, reduces clamping stagnation risk.In preferred technical solution, due to the step for being located proximate to valve opening of drain tap
Face, in this way when lubricating oil pump outlet oil pressure reaches the cracking pressure of design, oil pressure only needs that plunger is pushed axially to move in valve opening
Dynamic very short distance, can be such that oil inlet and drain tap communicates, and pressure limiting valve starts draining, when lubricating oil pump outlet oil pressure restores normal
Afterwards, plunger can be such that pressure limiting valve closes to the mobile very short distance of step surface under the elastic force effect of spring, and plunger is in valve opening
The distance of interior axial movement is shorter, and the risk for clamping stagnation occur is lower.
Detailed description of the invention
Fig. 1 is the pressure limiting valve switch plunger structure diagram in the utility model embodiment 1；
Fig. 2 is the pressure limiting valve switch plunger structure diagram in the utility model embodiment 2；
Fig. 3 is the pressure limiting valve structure schematic diagram in the utility model embodiment 3；
Fig. 4 is the pressure limiting valve structure schematic diagram in the utility model embodiment 4；
Appended drawing reference are as follows:
1 --- valve body 2 --- valve opening 3 --- drain tap
4 --- oil inlet 5 --- plunger 6 --- springs
7 --- plug screw 51 --- closed end 511 --- chamferings
52 --- leading portion 521 --- boss 522 --- ventholes
53 --- back segment.
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, the plunger is cylindrical structure closed at one end, and the cylindrical structure is by outer
The difference of diameter can be divided into two sections, wherein being leading portion 52 close to one section of closed end 51, another section is back segment 53, the outer diameter of leading portion 52
Less than the outer diameter of back segment 53, leading portion 52 is equipped with the outside boss 521 of a circle, the outer diameter of boss 521 close to the position of closed end 51
Equal with the outer diameter of back segment 53, the end face of closed end 51 is plane, and the side wall of leading portion 52 is equipped with gas vent 522.
Embodiment 2
As shown in Fig. 2, the overall structure of the pressure limiting valve plunger in the present embodiment and the basic phase of piston structure in embodiment 1
Together, the difference is that the end face of closed end 51 and cylinder periphery junction are set as chamfering 511, make cuing open for entire closed end 51
Face is frustum cone structure.
Embodiment 3
A kind of engine oil pump pressure-limiting valve of anti-clamping stagnation as shown in Figure 3, including valve body 1, valve body 1 are equipped with valve opening 2, valve opening 2
Hole wall be equipped with drain tap 3, one end of valve opening 2 is connected with oil inlet 4, and the internal diameter of oil inlet 4 is less than the internal diameter of valve opening 2, into
The junction of hydraulic fluid port 4 and valve opening 2 forms a cricoid step surface 21, and drain tap 3 is located proximate to the step surface 21, valve opening 2
In be sequentially installed with plunger 5, spring 6 and plug screw 7 inside-out.
As shown in Figure 1, plunger 5 is cylindrical structure closed at one end, which can be divided into two sections by the difference of outer diameter,
Wherein one section close to closed end 51 is leading portion 52, and another section is back segment 53, and the outer diameter of leading portion 52 is less than the outer diameter of back segment 53, preceding
Section 52 is equipped with the outside boss 521 of a circle close to the position of closed end 51, and the outer diameter of boss 521 is equal with the outer diameter of back segment 53,
The side wall of leading portion 52 is equipped with gas vent 522.
As shown in figure 3, the hole wall of the back segment 53 and boss 521 of plunger and valve opening 2 is small―gap suture cooperation, step surface 21 and column
The end face part of plug closed end 51 is in contact, and the end face of step surface 21 and plunger closed end 51 is plane.
As shown in figure 3, the back segment 53 due to plunger 5 is equal with the outer diameter of leading portion boss 521, plunger back segment 53 and boss
521 periphery and the hole wall of valve opening 2 are small―gap suture cooperation, thus play guiding role, prevent plunger 5 inclined in valve opening 2
When tiltedly causing clamping stagnation, and ensure that pressure limiting valve in off position, peripheral part energy and step of 51 end face of plunger closed end
Face 21 is flat and fit, and keeps oil sealing more reliable.The outer diameter of plunger leading portion 52 is less than the outer diameter of back segment 53, is thus formed with valve opening 2
Larger gap avoids fine impurities from accumulating, and reduces clamping stagnation risk.
As shown in figure 3, the step surface 21 for being located proximate to valve opening 2 of drain tap 3, this means that drain tap 3 from oil inlet 4
Distance it is very short, in this way when lubricating oil pump outlet oil pressure reaches the cracking pressure of design, oil pressure only needs to push plunger 5 in valve opening
The very short distance of axial movement, can be such that oil inlet 4 and drain tap 3 communicates, pressure limiting valve starts draining, when machine oil pump discharge in 2
After oil pressure restores normal, plunger 5, to the mobile very short distance of step surface 21, can make pressure limiting valve under the elastic force effect of spring 6
It closes, and the distance that plunger 5 moves axially in valve opening 2 is shorter, the risk for clamping stagnation occur is lower.
Embodiment 4
A kind of engine oil pump pressure-limiting valve of anti-clamping stagnation as shown in Figure 4, including valve body 1, valve body 1 are equipped with valve opening 2, valve opening 2
Hole wall be equipped with drain tap 3, one end of valve opening 2 is connected with oil inlet 4, and the internal diameter of oil inlet 4 is less than the internal diameter of valve opening 2, into
The junction of hydraulic fluid port 4 and valve opening 2 forms a cricoid step surface 21, and drain tap 3 is located proximate to the step surface 21, valve opening 2
In be sequentially installed with plunger 5, spring 6 and plug screw 7 inside-out.
As shown in Fig. 2, plunger 5 is cylindrical structure closed at one end, which can be divided into two sections by the difference of outer diameter,
Wherein one section close to closed end 51 is leading portion 52, and another section is back segment 53, and the outer diameter of leading portion 52 is less than the outer diameter of back segment 53, preceding
Section 52 is equipped with the outside boss 521 of a circle close to the position of closed end 51, and the outer diameter of boss 521 is equal with the outer diameter of back segment 53,
The side wall of leading portion 52 is equipped with gas vent 522, and the end face and cylinder periphery junction of closed end 51 are set as chamfering 511, make whole
The section of a closed end 51 is frustum cone structure.
As shown in figure 4, step surface 21 is inclined-plane, tilt angle can ensure that the chamfering of step surface 21 Yu plunger closed end 51
511 fit.
As shown in figure 4, the back segment 53 due to plunger 5 is equal with the outer diameter of leading portion boss 521, plunger back segment 53 and boss
521 periphery and the hole wall of valve opening 2 are small―gap suture cooperation, thus play guiding role, prevent plunger 5 inclined in valve opening 2
When tiltedly causing clamping stagnation, and ensure that pressure limiting valve in off position, the chamfering 511 of plunger closed end 51 can be with inclined step
Face 21 is flat and fit, and keeps oil sealing more reliable.The outer diameter of plunger leading portion 52 is less than the outer diameter of back segment 53, is thus formed with valve opening 2
Larger gap avoids fine impurities from accumulating, and reduces clamping stagnation risk.
As shown in figure 4, the step surface 21 for being located proximate to valve opening 2 of drain tap 3, this means that drain tap 3 from oil inlet 4
Distance it is very short, in this way when lubricating oil pump outlet oil pressure reaches the cracking pressure of design, oil pressure only needs to push plunger 5 in valve opening
The very short distance of axial movement, can be such that oil inlet 4 and drain tap 3 communicates, pressure limiting valve starts draining, when machine oil pump discharge in 2
After oil pressure restores normal, plunger 5, to the mobile very short distance of step surface 21, can make pressure limiting valve under the elastic force effect of spring 6
It closes, and the distance that plunger 5 moves axially in valve opening 2 is shorter, the risk for clamping stagnation occur is lower.
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 is cylindrical structure closed at one end, which presses outer diameter
Difference can be divided into two sections, wherein being leading portion (52) close to one section of closed end (51), another section is back segment (53), the leading portion
(52) outer diameter is less than the outer diameter of the back segment (53), and the leading portion (52) is equipped with a circle outward close to the position of closed end (51)
Boss (521), the outer diameter of the boss (521) is equal with the outer diameter of the back segment (53).
2. pressure limiting valve plunger according to claim 1, it is characterised in that: the end face of the closed end (51) is plane.
3. pressure limiting valve plunger according to claim 1, it is characterised in that: the end face and cylinder periphery of the closed end (51)
Junction is set as chamfering (511), makes the section frustum cone structure of entire closed end (51).
4. pressure limiting valve plunger as claimed in any of claims 1 to 3, it is characterised in that: the side of the leading portion (52)
Wall is equipped with gas vent (522).
5. a kind of engine oil pump pressure-limiting valve of anti-clamping stagnation, including valve body (1), the valve body (1) is equipped with valve opening (2), the valve opening
(2) hole wall is equipped with drain tap (3), and one end of the valve opening (2) is connected with oil inlet (4), the internal diameter of the oil inlet (4)
Less than the internal diameter of the valve opening (2), the junction of the oil inlet (4) and the valve opening (2) forms a cricoid step surface
(21), it is sequentially installed with plunger (5) and spring (6) inside-out in the valve opening (2), it is characterised in that: the plunger (5) is
Cylindrical structure closed at one end, the cylindrical structure can be divided into two sections by the difference of outer diameter, wherein close to one section of closed end (51)
For leading portion (52), another section is back segment (53), and the outer diameter of the leading portion (52) is less than the outer diameter of the back segment (53), the leading portion
(52) position close to closed end (51) is equipped with the outside boss (521) of a circle, the outer diameter and the back segment of the boss (521)
(53) outer diameter is equal；It is small―gap suture between the plunger back segment (53) and the boss (521) and the hole wall of the valve opening (2)
Cooperation.
6. the engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5, it is characterised in that: the position of the drain tap (3)
Close to the step surface (21).
7. the engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5 or 6, it is characterised in that: the step surface (21) with
The end face outer peripheral portion of the closed end (51) is in contact, and the end face of the step surface (21) and the closed end (51) is flat
Face.
8. the engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5 or 6, it is characterised in that: the closed end (51)
End face and cylinder periphery junction are set as chamfering (511), make the section frustum cone structure of entire closed end (51)；The step
Face (21) is inclined-plane, and tilt angle can make the step surface (21) and the chamfering (511) of the closed end fit.
9. the engine oil pump pressure-limiting valve of anti-clamping stagnation according to claim 5 or 6, it is characterised in that: the side of the leading portion (52)
Wall is equipped with gas vent (522).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820782756.XU CN208331745U (en) | 2018-05-24 | 2018-05-24 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and the anti-clamping stagnation comprising above-mentioned plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820782756.XU CN208331745U (en) | 2018-05-24 | 2018-05-24 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and the anti-clamping stagnation comprising above-mentioned plunger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208331745U true CN208331745U (en) | 2019-01-04 |
Family
ID=64775243
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820782756.XU Active CN208331745U (en) | 2018-05-24 | 2018-05-24 | A kind of engine oil pump pressure-limiting valve of pressure limiting valve plunger and the anti-clamping stagnation comprising above-mentioned plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208331745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488608A (en) * | 2018-05-24 | 2018-09-04 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plunger and improved engine oil pump pressure-limiting valve |
-
2018
- 2018-05-24 CN CN201820782756.XU patent/CN208331745U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488608A (en) * | 2018-05-24 | 2018-09-04 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plunger and improved engine oil pump pressure-limiting valve |
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