CN216518357U - Oil pumping system for high-pressure common-rail oil supply pump - Google Patents
Oil pumping system for high-pressure common-rail oil supply pump Download PDFInfo
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- CN216518357U CN216518357U CN202220151547.1U CN202220151547U CN216518357U CN 216518357 U CN216518357 U CN 216518357U CN 202220151547 U CN202220151547 U CN 202220151547U CN 216518357 U CN216518357 U CN 216518357U
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- oil
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- valve body
- oil inlet
- cavity
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- 238000005086 pumping Methods 0.000 title abstract description 9
- 238000009434 installation Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 85
- 239000000295 fuel oil Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
The utility model provides an oil pumping system for a high-pressure common-rail oil supply pump, which comprises a plunger sleeve and an oil outlet valve arranged in the plunger sleeve, wherein the oil outlet valve consists of a valve body, a spring and a spring seat; the beneficial technical effects of the utility model are as follows: the utility model provides a pump oil system for high pressure common rail fuel feed pump, this pump oil system's unit interval fuel flow flux is great, can satisfy the fuel supply demand of common rail system.
Description
Technical Field
The utility model relates to a technology for supplying fuel oil for a common rail system, in particular to an oil pumping system for a high-pressure common rail oil supply pump.
Background
The pump oil system is one of the core components of the common rail system oil pump; with the development of the technology, the rail pressure requirement of the common rail system is higher and higher, and indirectly higher requirements are provided for the oil pumping capacity of the oil pumping system. In the prior art, the flow cross section of an oil outlet valve on an oil pumping system is very limited, so that a large amount of fuel oil is difficult to pump in a short time, and the further improvement of the rail pressure of a common rail system is influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the background art, the utility model provides an oil pumping system for a high-pressure common rail oil supply pump, which comprises a plunger sleeve and an oil outlet valve arranged in the plunger sleeve, and the improvement is that: an oil outlet valve installation cavity, an oil inlet cavity and a plunger cavity are arranged in the plunger sleeve, the inner diameter of the oil outlet valve installation cavity is smaller than that of the oil inlet cavity, the lower end of the oil outlet valve installation cavity is communicated with the upper end of the oil inlet cavity, the lower end of the oil inlet cavity is communicated with the upper end of the plunger cavity through a connecting hole, the diameter of the connecting hole is smaller than that of the oil inlet cavity, and the connecting hole and the oil outlet valve installation cavity are in transition through a conical surface;
the oil outlet valve consists of a valve body, a spring and a spring seat;
the upper part of the valve body forms a guide section, the lower part of the valve body forms an oil inlet section, and the outer diameter of the oil inlet section is smaller than the diameter of the guide section; the upper end surface of the valve body is provided with an inwards concave spring groove, the bottom of the spring groove is provided with an oil guide hole, the diameter of the oil guide hole is smaller than that of the spring groove, and a first step surface is formed at the joint of the oil guide hole and the spring groove; the lower end of the oil guide hole extends to the lower part of the oil inlet section, and the oil guide hole is a blind hole; the lower part of the oil inlet section is provided with a plurality of radial holes, the radial holes are used for communicating the oil guide hole with the outer wall of the oil inlet section, and the plurality of radial holes are distributed along the circumferential direction of the valve body; the lower end face of the valve body is provided with a sealing face matched with the conical face, and the radial hole is positioned on the upper side of the sealing face; the outer diameter of the guide section is matched with the inner diameter of the oil outlet valve mounting cavity;
an axial through hole is formed in the spring seat, and a second step surface is arranged in the middle of the axial through hole; the outer diameter of the spring seat is matched with the inner diameter of the oil outlet valve mounting cavity;
the valve body is arranged in the oil inlet cavity, and when the sealing surface is contacted with the conical surface, the whole length of the oil inlet section is positioned in the oil inlet cavity; the spring seat is arranged in the oil outlet valve mounting cavity, the spring seat is positioned above the valve body, the upper end of the spring seat is contacted with an external supporting structure, and a gap is reserved between the lower end of the spring seat and the valve body; the spring is arranged between the valve body and the spring seat, the upper end of the spring is in contact with the second step surface, and the lower end of the spring is in contact with the first step surface; the spring can urge the valve body against the conical surface and the spring can urge the spring seat against the outer support structure.
The principle of the structure is as follows: referring to fig. 1, when the plunger moves downward, the oil pressure on the left side of the oil inlet valve is reduced, the fuel oil at the oil inlet jacks the sealing valve core on the oil inlet valve, and the fuel oil enters the cavity on the lower side of the oil outlet valve; when the plunger piston moves upwards, the oil pressure on the lower side of the oil outlet valve rises, when the valve body is jacked up by fuel oil, high-pressure fuel oil enters the oil guide hole through the radial hole, and the fuel oil flows through the axial through hole and then is output outwards.
After adopting aforementioned structure, the delivery valve can provide the great pore of size, makes a large amount of fuel can pass through fast, can obviously promote the pump oil ability of pump oil system.
The beneficial technical effects of the utility model are as follows: the oil pumping system for the high-pressure common rail oil supply pump is large in fuel flow flux per unit time and capable of meeting the fuel supply requirement of a common rail system.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the oil outlet valve;
the names corresponding to each mark in the figure are respectively: the plunger sleeve 1, the oil outlet valve 2, the valve body 21, the spring 22, the spring seat 23, the oil guide hole 24, the radial hole 25, the oil inlet 3, the oil inlet valve 4 and the oil inlet cavity 5.
Detailed Description
The utility model provides a pump oil system for high pressure common rail fuel feed pump, includes plunger barrel 1, sets up the delivery valve 2 in plunger barrel 1, and its improvement lies in: an oil outlet valve installation cavity, an oil inlet cavity and a plunger cavity are arranged in the plunger sleeve 1, the inner diameter of the oil outlet valve installation cavity is smaller than that of the oil inlet cavity, the lower end of the oil outlet valve installation cavity is communicated with the upper end of the oil inlet cavity, the lower end of the oil inlet cavity is communicated with the upper end of the plunger cavity through a connecting hole, the diameter of the connecting hole is smaller than that of the oil inlet cavity, and the connecting hole and the oil outlet valve installation cavity are in transition through a conical surface;
the oil outlet valve consists of a valve body 21, a spring 22 and a spring seat 23;
the upper part of the valve body 21 forms a guide section, the lower part of the valve body 21 forms an oil inlet section, and the outer diameter of the oil inlet section is smaller than the diameter of the guide section; an inwards concave spring groove is formed in the upper end face of the valve body 21, an oil guide hole 24 is formed in the bottom of the spring groove, the diameter of the oil guide hole 24 is smaller than that of the spring groove, and a first step face is formed at the joint of the oil guide hole 24 and the spring groove; the lower end of the oil guide hole 24 extends to the lower part of the oil inlet section, and the oil guide hole 24 is a blind hole; the lower part of the oil inlet section is provided with a plurality of radial holes 25, the radial holes 25 communicate the oil guide hole 24 with the outer wall of the oil inlet section, and the plurality of radial holes 25 are distributed along the circumferential direction of the valve body 21; the lower end face of the valve body 21 is provided with a sealing surface matched with the conical surface, and the radial hole 25 is positioned on the upper side of the sealing surface; the outer diameter of the guide section is matched with the inner diameter of the oil outlet valve mounting cavity;
an axial through hole is formed in the spring seat 23, and a second step surface is arranged in the middle of the axial through hole; the outer diameter of the spring seat 23 is matched with the inner diameter of the oil outlet valve mounting cavity;
the valve body 21 is arranged in the oil inlet cavity, and when the sealing surface is contacted with the conical surface, the whole length of the oil inlet section is positioned in the oil inlet cavity; the spring seat 23 is arranged in the oil outlet valve installation cavity, the spring seat 23 is positioned above the valve body 21, the upper end of the spring seat 23 is in contact with an external supporting structure, and a gap is reserved between the lower end of the spring seat 23 and the valve body 21; the spring 22 is arranged between the valve body 21 and the spring seat 23, the upper end of the spring 22 is in contact with the second step surface, and the lower end of the spring 22 is in contact with the first step surface; the spring 22 can press the valve body 21 against said conical surface and the spring 22 can press the spring seat 23 against said outer support structure.
Claims (1)
1. The utility model provides a pump oil system for high pressure is rail feed pump altogether, includes plunger barrel (1), sets up oil outlet valve (2) in plunger barrel (1), its characterized in that: an oil outlet valve installation cavity, an oil inlet cavity and a plunger cavity are arranged in the plunger sleeve (1), the inner diameter of the oil outlet valve installation cavity is smaller than that of the oil inlet cavity, the lower end of the oil outlet valve installation cavity is communicated with the upper end of the oil inlet cavity, the lower end of the oil inlet cavity is communicated with the upper end of the plunger cavity through a connecting hole, the diameter of the connecting hole is smaller than that of the oil inlet cavity, and the connecting hole and the oil outlet valve installation cavity are in transition through conical surfaces;
the oil outlet valve consists of a valve body (21), a spring (22) and a spring seat (23);
the upper part of the valve body (21) forms a guide section, the lower part of the valve body (21) forms an oil inlet section, and the outer diameter of the oil inlet section is smaller than the diameter of the guide section; the upper end surface of the valve body (21) is provided with an inwards concave spring groove, the bottom of the spring groove is provided with an oil guide hole (24), the diameter of the oil guide hole (24) is smaller than that of the spring groove, and a first step surface is formed at the joint of the oil guide hole (24) and the spring groove; the lower end of the oil guide hole (24) extends to the lower part of the oil inlet section, and the oil guide hole (24) is a blind hole; the lower part of the oil inlet section is provided with a plurality of radial holes (25), the oil guide hole (24) is communicated with the outer wall of the oil inlet section through the radial holes (25), and the plurality of radial holes (25) are circumferentially distributed along the valve body (21); the lower end face of the valve body (21) is provided with a sealing face matched with the conical face, and the radial hole (25) is positioned on the upper side of the sealing face; the outer diameter of the guide section is matched with the inner diameter of the oil outlet valve mounting cavity;
an axial through hole is formed in the spring seat (23), and a second step surface is arranged in the middle of the axial through hole; the outer diameter of the spring seat (23) is matched with the inner diameter of the oil outlet valve mounting cavity;
the valve body (21) is arranged in the oil inlet cavity, and when the sealing surface is contacted with the conical surface, the whole length of the oil inlet section is positioned in the oil inlet cavity; the spring seat (23) is arranged in the oil outlet valve installation cavity, the spring seat (23) is positioned above the valve body (21), the upper end of the spring seat (23) is in contact with an external supporting structure, and a gap is reserved between the lower end of the spring seat (23) and the valve body (21); the spring (22) is arranged between the valve body (21) and the spring seat (23), the upper end of the spring (22) is in contact with the second step surface, and the lower end of the spring (22) is in contact with the first step surface; a spring (22) can urge the valve body (21) against the conical surface, and the spring (22) can urge a spring seat (23) against the external support structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220151547.1U CN216518357U (en) | 2022-01-20 | 2022-01-20 | Oil pumping system for high-pressure common-rail oil supply pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220151547.1U CN216518357U (en) | 2022-01-20 | 2022-01-20 | Oil pumping system for high-pressure common-rail oil supply pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216518357U true CN216518357U (en) | 2022-05-13 |
Family
ID=81518853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220151547.1U Active CN216518357U (en) | 2022-01-20 | 2022-01-20 | Oil pumping system for high-pressure common-rail oil supply pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216518357U (en) |
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2022
- 2022-01-20 CN CN202220151547.1U patent/CN216518357U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 401120 No.6 cuining Road, jingkaiyuan, Liangjiang New District, Yubei District, Chongqing Patentee after: Heavy Oil High Tech Electronic Fuel Injection System Co.,Ltd. Address before: 401120 No.6 cuining Road, jingkaiyuan, Liangjiang New District, Yubei District, Chongqing Patentee before: Heavy oil high tech electronic fuel injection system (Chongqing) Co.,Ltd. |