CN209990934U - Pressure limiting valve plunger and oil pump pressure limiting valve capable of avoiding pressure fluctuation - Google Patents
Pressure limiting valve plunger and oil pump pressure limiting valve capable of avoiding pressure fluctuation Download PDFInfo
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- CN209990934U CN209990934U CN201920824320.7U CN201920824320U CN209990934U CN 209990934 U CN209990934 U CN 209990934U CN 201920824320 U CN201920824320 U CN 201920824320U CN 209990934 U CN209990934 U CN 209990934U
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- pressure limiting
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- 238000005192 partition Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 7
- 238000012795 verification Methods 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 73
- 239000010705 motor oil Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to an internal-combustion engine lubricating system relates to a pressure-limiting valve plunger particularly and avoids oil pump pressure-limiting valve of pressure fluctuation. The utility model provides a pressure limiting valve plunger provides an oil pump pressure limiting valve who adopts this plunger to avoid pressure fluctuation simultaneously, and this plunger is whole to be the drum structure that the external diameter is the same, the hole of drum is equipped with a baffle, the baffle separates into each other communicating spring guiding hole and draining inner chamber with the hole of drum, is equipped with a plurality of draining holes on corresponding one section drum section of wall of draining inner chamber, is equipped with a ring channel on corresponding one section drum periphery of spring guiding hole, an exhaust hole has been seted up in the ring channel. The plunger adopting the structure can avoid pressure fluctuation during oil drainage, can avoid clamping stagnation of the plunger in the valve hole due to deflection, and is favorable for adjusting the oil drainage capability of the pressure limiting valve in the test verification process.
Description
Technical Field
The utility model relates to an internal-combustion engine lubricating system relates to a pressure limiting valve plunger and oil pump pressure limiting valve particularly.
Background
The oil pump is an important part in a lubricating system, and has the function of providing sufficient pressure and flow for the lubricating system, and the oil pressure must be ensured within a certain range so as to ensure that each friction piece is sufficiently lubricated and the related pressure-bearing piece is not damaged.
The oil pump pressure limiting valve plays a role in controlling the flow of oil and adjusting the pressure of the oil in the operation process of the oil pump.
The full-opening oil drainage capability of the oil pump pressure limiting valve needs to be determined through test verification, but after the structure and the size of the oil pump are determined, the full-opening oil drainage capability of the traditional pressure limiting valve is correspondingly determined. When not needing very high draining ability, can only solve through the voltage limiting valve hole structure of change setting on the pump body, still involve repairing the mould to the pump body through mould production, efficiency is lower, and the cost is higher. Meanwhile, the traditional pressure limiting valve generates larger pressure fluctuation at the opening moment due to the instantaneous change of the overflowing cross section, so that the normal work of the oil pump is not facilitated. In addition, after the traditional pressure limiting valve is opened, one end of the traditional pressure limiting valve is suspended and insufficient in support, so that the plunger is deflected or clamped in the valve hole.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pressure limiting valve plunger provides an adopt the oil pump pressure limiting valve of avoiding pressure fluctuation of this plunger simultaneously, and the pressure fluctuation when adopting the plunger of this kind of structure can avoid draining to and can avoid the plunger to produce the jamming because of the incline in the valve hole, and still be favorable to adjusting the draining ability of pressure limiting valve at experimental verification in-process.
In order to achieve the above object, the utility model discloses a technical scheme about pressure limiting valve plunger is: the pressure limiting valve plunger is integrally of a cylinder structure with the same outer diameter, a partition plate is arranged in an inner hole of the cylinder, the partition plate divides the inner hole of the cylinder into a spring guide hole and an oil drainage inner cavity which are not communicated with each other, a plurality of oil drainage holes are formed in the wall of the cylinder corresponding to one section of the oil drainage inner cavity, an annular groove is formed in the outer peripheral surface of the cylinder corresponding to one section of the spring guide hole, and an exhaust hole is formed in the annular groove.
Preferably, the length of the spring guide hole is greater than that of the oil drainage inner cavity.
The utility model discloses a technical scheme is about pressure limiting valve: an oil pump pressure limiting valve for avoiding pressure fluctuation comprises a valve hole, a plunger, an oil inlet, an oil drainage port, a spring and a screw plug, wherein the plunger is integrally of a cylindrical structure with the same outer diameter, a partition plate is arranged in an inner hole of a cylinder and divides the inner hole of the cylinder into a spring guide hole and an oil drainage inner cavity which are not communicated with each other, a plurality of oil drainage holes are arranged on the wall of the cylinder corresponding to one section of the oil drainage inner cavity, an annular groove is arranged on the outer peripheral surface of the cylinder corresponding to one section of the spring guide hole, and an exhaust hole is formed in the annular groove; the diameter of the oil inlet is smaller than that of the valve hole, and an annular step surface is formed at the joint between the oil inlet and the valve hole; the outer peripheral surface of the whole plunger piston is in small clearance fit with the inner wall of the valve hole; the opening of the oil drainage inner cavity faces the oil inlet, and the spring guide hole is used for installing the spring.
Preferably, the length of the spring guide hole is greater than that of the oil drainage inner cavity.
Among the above-mentioned technical scheme, because the whole drum structure that is the same of external diameter of plunger, just so can avoid the skew of plunger in the valve hole, the hole of drum is equipped with the baffle, and the baffle separates into not communicating spring guiding hole and draining inner chamber each other with the hole of drum, is equipped with a plurality of draining holes on corresponding one section drum wall of draining inner chamber, and the pressure fluctuation that the pressure limiting valve opened suddenly and cause can be avoided to the structure in a plurality of draining holes, is equipped with an annular groove on corresponding one section drum periphery of spring guiding hole, seted up a gas vent in the annular groove, be favorable to the pressure in the spring guiding hole when plunger compression spring like this.
Before the pressure limiting valve is opened, the plunger seals oil through the partition plate under the elastic force of the spring, when the engine oil pressure of an oil inlet of the pressure limiting valve is increased, the oil pressure acts on the partition plate to push the plunger to compress the spring to move until an oil drainage hole in the plunger is communicated with an oil drainage port of the pressure limiting valve, the pressure limiting valve is opened at the moment, high-pressure oil is discharged sequentially through the plunger oil drainage inner cavity, the oil drainage hole and the oil drainage port, the oil drainage holes are completely communicated with the oil drainage port by being shielded in the process that the pressure limiting valve is opened, the area is slowly increased, and pressure fluctuation caused by sudden opening is avoided. In addition, if the pressure limiting valve is found to have too strong oil drainage capability in the test verification process, the adjustment can be carried out by changing the aperture sizes of a plurality of oil drainage holes in the plunger without changing the structure of the valve hole in the pump body.
Drawings
Fig. 1 is a schematic structural view of a pressure limiting valve plunger in embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of the pressure limiting valve plunger of FIG. 1;
fig. 3 is a schematic view of a pressure limiting valve in a closed state according to embodiment 2 of the present invention;
fig. 4 is a schematic view of the pressure limiting valve in an open state according to embodiment 2 of the present invention;
the reference signs are:
1-partition board 2-spring guide hole 3-oil drainage inner cavity
4-oil drain port 5-ring groove 6-exhaust hole
10-plunger 20-valve hole 30-spring
40-oil inlet 50-oil drain 60-plug screw.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations and positional relationships illustrated in the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.
Example 1
As shown in fig. 1 and 2, the pressure limiting valve plunger has a cylindrical structure with the same outer diameter as a whole, a partition plate 1 is arranged in an inner hole of the cylinder, the partition plate 1 divides the inner hole of the cylinder into a spring guide hole 2 and an oil drainage inner cavity 3 which are not communicated with each other, the length of the spring guide hole 2 is greater than that of the oil drainage inner cavity 3, a plurality of oil drainage holes 4 are arranged on the wall of the cylinder corresponding to one section of the oil drainage inner cavity 3, an annular groove 5 is arranged on the outer circumferential surface of the cylinder corresponding to one section of the spring guide hole 2, and an exhaust hole 6 is formed in the annular groove 5.
Example 2
As shown in fig. 1 to 4, the oil pump pressure limiting valve for avoiding pressure fluctuation comprises a valve hole 20, a plunger 10, an oil inlet 40, an oil drain 50, a spring 30 and a screw plug 60, wherein the plunger 10 is integrally of a cylinder structure with the same outer diameter, a partition plate 1 is arranged in an inner hole of the cylinder, the inner hole of the cylinder is divided into a spring guide hole 2 and an oil drain inner cavity 3 which are not communicated with each other by the partition plate 1, and the length of the spring guide hole 2 is greater than that of the oil drain inner cavity 3; a plurality of oil drainage holes 4 are arranged on the wall of the cylinder corresponding to one section of the oil drainage inner cavity 3, an annular groove 5 is arranged on the peripheral surface of the cylinder corresponding to one section of the spring guide hole 2, and an exhaust hole 6 is arranged in the annular groove 5; the diameter of the oil inlet 40 is smaller than that of the valve hole 20, and an annular step surface is formed at the joint between the oil inlet 40 and the valve hole 20; the outer peripheral surface of the whole plunger 10 is in small clearance fit with the inner wall of the valve hole 20; the opening of the oil drainage inner cavity 3 faces the oil inlet 40, and the spring guide hole 2 is used for installing the spring 30.
Among the above-mentioned technical scheme, because plunger 10 wholly is the drum structure that the external diameter is the same, just so can avoid the incline of plunger 10 in valve opening 20, the hole of drum is equipped with baffle 1, baffle 1 separates into not communicating spring guiding hole 2 and draining inner chamber 3 each other with the hole of drum, be equipped with a plurality of draining holes 4 on the drum wall that corresponds draining inner chamber 3 one section, the pressure fluctuation that the pressure limiting valve suddenly opened and cause can be avoided to the structure of a plurality of draining holes 4, be equipped with an annular groove 5 on the drum peripheral face that corresponds spring guiding hole 2 one section, an exhaust hole 6 has been seted up in the annular groove 5, be favorable to plunger 10 to discharging the pressure in the spring guiding hole 2 when compressing spring 30 like this.
Before the pressure limiting valve is opened, the plunger 10 seals oil through the partition plate 1 under the elastic force action of the spring 30, when the engine oil pressure of the oil inlet 40 of the pressure limiting valve is increased, the oil pressure acts on the partition plate 1 to push the plunger 10 to compress the spring 30 to move until the oil drainage hole 4 in the plunger 10 is communicated with the oil drainage port 50 of the pressure limiting valve, the pressure limiting valve is opened at the moment, high-pressure oil is discharged sequentially through the plunger oil drainage inner cavity 3, the oil drainage hole 4 and the oil drainage port 50, the oil drainage holes 4 are completely communicated with the oil drainage port 50 by being shielded in the opening process of the pressure limiting valve, the area is slowly increased, and pressure fluctuation caused by sudden opening is avoided. In addition, if the pressure relief capability of the pressure limiting valve is too strong in the test verification process, the adjustment can be performed by changing the aperture size of the plurality of oil relief holes 4 on the plunger 10 without changing the structure of the valve hole on the pump body.
The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.
In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.
Claims (4)
1. A pressure limiting valve plunger characterized by: the plunger is integrally of a cylindrical structure with the same outer diameter, a partition plate (1) is arranged in an inner hole of the cylinder, the partition plate (1) separates the inner hole of the cylinder into a spring guide hole (2) and an oil drainage inner cavity (3) which are not communicated with each other, a plurality of oil drainage holes (4) are formed in the wall of the cylinder barrel corresponding to one section of the oil drainage inner cavity (3), an annular groove (5) is formed in the outer periphery of the cylinder corresponding to one section of the spring guide hole (2), and an exhaust hole (6) is formed in the annular groove (5).
2. A pressure limiting valve plunger as set forth in claim 1 wherein: the length of the spring guide hole (2) is greater than that of the oil drainage inner cavity (3).
3. The utility model provides an avoid oil pump pressure limiting valve of pressure fluctuation, includes valve opening (20), plunger (10), oil inlet (40), draining port (50), spring (30), plug screw (60), its characterized in that: the plunger (10) is integrally of a cylinder structure with the same outer diameter, a partition plate (1) is arranged in an inner hole of the cylinder, the partition plate (1) divides the inner hole of the cylinder into a spring guide hole (2) and an oil drainage inner cavity (3) which are not communicated with each other, a plurality of oil drainage holes (4) are arranged on the wall of the cylinder corresponding to one section of the oil drainage inner cavity (3), an annular groove (5) is arranged on the outer peripheral surface of the cylinder corresponding to one section of the spring guide hole (2), and an exhaust hole (6) is formed in the annular groove (5); the diameter of the oil inlet (40) is smaller than that of the valve hole (20), and an annular step surface is formed at the joint between the oil inlet (40) and the valve hole (20); the outer peripheral surface of the whole plunger (10) is in small clearance fit with the inner wall of the valve hole (20); the opening of the oil drainage inner cavity (3) faces the oil inlet (40), and the spring guide hole (2) is used for installing the spring (30).
4. The oil pump pressure limiting valve for avoiding pressure fluctuation according to claim 3, characterized in that: the length of the spring guide hole (2) is greater than that of the oil drainage inner cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920824320.7U CN209990934U (en) | 2019-06-03 | 2019-06-03 | Pressure limiting valve plunger and oil pump pressure limiting valve capable of avoiding pressure fluctuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920824320.7U CN209990934U (en) | 2019-06-03 | 2019-06-03 | Pressure limiting valve plunger and oil pump pressure limiting valve capable of avoiding pressure fluctuation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209990934U true CN209990934U (en) | 2020-01-24 |
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ID=69296065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920824320.7U Active CN209990934U (en) | 2019-06-03 | 2019-06-03 | Pressure limiting valve plunger and oil pump pressure limiting valve capable of avoiding pressure fluctuation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209990934U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159778A (en) * | 2019-06-03 | 2019-08-23 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plunger and the engine oil pump pressure-limiting valve for avoiding pressure oscillation |
-
2019
- 2019-06-03 CN CN201920824320.7U patent/CN209990934U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159778A (en) * | 2019-06-03 | 2019-08-23 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plunger and the engine oil pump pressure-limiting valve for avoiding pressure oscillation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee after: Hunan Meihu Intelligent Manufacturing Co.,Ltd. Country or region after: China Address before: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee before: Hunan Oil Pump Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |