CN216894700U - Oil inlet valve of electric control high-pressure oil supply pump - Google Patents
Oil inlet valve of electric control high-pressure oil supply pump Download PDFInfo
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- CN216894700U CN216894700U CN202220715218.5U CN202220715218U CN216894700U CN 216894700 U CN216894700 U CN 216894700U CN 202220715218 U CN202220715218 U CN 202220715218U CN 216894700 U CN216894700 U CN 216894700U
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- section
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- oil inlet
- valve
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- 230000007704 transition Effects 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 60
- 239000000295 fuel oil Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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Abstract
The utility model provides an oil inlet valve of an electric control high-pressure oil supply pump, which is characterized in that: comprises a valve seat, a valve core, a spring and a spring seat; an oil inlet middle hole is formed in the left end face of the valve seat, and a guide through hole is formed in the center of the bottom of the oil inlet middle hole; the hole-sinking section, the transition hole section and the middle hole section are sequentially connected from left to right, the transition hole section consists of a first conical section and a second conical section from left to right, and an annular sealing surface is formed at the joint of the first conical section and the second conical section; the valve core consists of a first cylindrical section, a transition conical section and a guide cylindrical section from left to right; the guide cylindrical section is sleeved in the guide through hole, the spring seat is sleeved at the right end of the guide cylindrical section, the spring is sleeved on the guide cylindrical section, the spring is arranged between the spring seat and the valve seat, and the transition conical section is in circumferential contact with the annular sealing surface under the action of the restoring force of the spring. The oil supply pump adopting the oil inlet valve has the advantages of compact structure, low processing cost and improved sealing effect.
Description
Technical Field
The utility model relates to the technical field of oil supply of vehicle engines, in particular to an oil inlet valve of an electric control high-pressure oil supply pump.
Background
The pump oil system assembly is a core part in an oil injection pump of a high-pressure common rail system, can suck low-pressure fuel oil into a high-pressure cavity of a plunger, generates high-pressure fuel oil by mutually matching with an oil inlet valve assembly and an oil outlet valve assembly when the plunger moves, and then conveys the high-pressure fuel oil to a high-pressure common rail pipe through an oil outlet channel.
In the prior art, the oil inlet valve and the oil outlet valve are arranged in an integral structure or a split structure, and the oil inlet valve and the oil outlet valve in the integral structure are axially arranged above the plunger, so that the overall height of the oil supply pump is large, and the space optimization design, namely the layout of an oil duct, is not facilitated. The oil inlet valve and the oil outlet valve of a split type or integral type structure are usually sealed in a plane hard mode, the sealing scheme has high requirements on the machining of sealing surfaces, the machining cost is improved, the sealing surfaces are large, cavitation erosion is easily generated on each sealing surface under the action of high pressure, the oil supply capacity of an oil supply pump is influenced, and the function failure of the oil supply pump can be caused in severe cases.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the background art, the utility model provides an oil inlet valve of an electric control high-pressure oil supply pump, which aims to solve the problems that an oil supply system of the prior art is large in height and size, occupies a large space, is high in machining cost of a sealing surface and is easy to lose effectiveness of the sealing surface.
The purpose of the utility model is realized by the technical scheme, which comprises the following steps:
the utility model provides an inlet valve of automatically controlled high-pressure fuel feed pump which innovation point lies in: comprises a valve seat, a valve core, a spring and a spring seat;
the valve seat is a cylindrical structure body, an oil inlet middle hole is formed in the left end face of the valve seat, the virtual axis line of the oil inlet middle hole is overlapped with the virtual axis line of the valve seat, a guide through hole is formed in the center of the bottom of the oil inlet middle hole, and the guide through hole and the oil inlet middle hole are coaxially arranged; a plurality of oil inlet holes are uniformly distributed on the circumferential surface of the valve seat, the axial direction of each oil inlet hole is arranged along the radial direction of the oil inlet middle hole, and the inner end of each oil inlet hole is opened on the wall of the oil inlet middle hole; the oil inlet middle hole is composed of a counter bore section, a transition hole section and a middle hole section which are sequentially connected from left to right, the diameters of the counter bore section, the transition hole section and the middle hole section are sequentially reduced, the transition hole section is composed of a first conical section and a second conical section from left to right, the taper of the first conical section is larger than that of the second conical section, and an annular sealing surface is formed at the joint of the first conical section and the second conical section;
the valve core consists of a first cylindrical section, a transition conical section and a guide cylindrical section which are sequentially connected from left to right, the diameter of the first cylindrical section is smaller than that of the counter bore section and larger than that of the annular sealing surface, and the diameter of the guide cylindrical section is matched with that of the guide through hole;
the spring seat is a cylindrical structural body, and an annular step surface for supporting the spring is arranged on the outer peripheral surface of the right end of the spring seat;
the guide cylindrical section is sleeved in the guide through hole, the right end of the guide cylindrical section extends out of the valve seat, the spring seat is sleeved at the right end of the guide cylindrical section, the spring is sleeved on the guide cylindrical section, the spring is arranged between the spring seat and the valve seat, the left end of the spring is in contact with the right end of the valve seat, the right end of the spring is in contact with the annular step surface, the spring seat is axially fixed with the valve core, the spring is a pressure spring, and the transition conical section is in circumferential contact with the annular sealing surface under the action of restoring force of the spring.
Preferably, a rounding is arranged between the transition conical section and the guide cylindrical section.
Preferably, the number of the oil inlet holes is 4.
Preferably, the right end face of the valve seat is provided with an annular groove, and the left end of the spring is arranged in the annular groove.
Due to the adoption of the technical scheme, the utility model has the following advantages: because the oil inlet valve can be arranged in the oil pumping system according to the structure shown in the attached figure 3, the axial direction of the oil inlet valve is vertical to the axial direction of the plunger, and the oil inlet valve is radially arranged instead of axially arranged, the axial height dimension is greatly reduced, the installation space is saved, and the size optimization design of the oil pumping system is facilitated; on the other hand, the transition hole section adopts two-section conical sections, the junction of the two conical sections is utilized to form an annular sealing surface which is sealed with the transition conical section of the valve core, the contact area between the sealing surfaces is small, the processing precision and the cost are reduced, the function of running-in compensation is also realized, the sealing effect is greatly improved, and the reliability of the oil pumping system is improved.
Drawings
The drawings of the present invention are described below.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a valve seat;
fig. 3 is a schematic view of the mounting structure of the present invention.
In the figure: 1. a valve seat; 2. a valve core; 3. a spring; 4. a spring seat; 11. an oil inlet mesopore; 12. a guide through hole; 13. an oil inlet hole; 14. an annular groove; 111. a countersink section; 112. a transition hole section; 113. a mesoporous section; 1121. a first conical section; 1122. a second conical section; 21. a first cylindrical section; 22. a transition conical section; 23. a guiding cylindrical section; 41. an annular step surface.
Detailed Description
The utility model is further illustrated by the following figures and examples.
The oil inlet valve of the electric control high-pressure oil supply pump shown in the attached figure 1 comprises a valve seat 1, a valve core 2, a spring 3 and a spring seat 4;
as shown in fig. 2, the valve seat 1 is a cylindrical structural body, an oil inlet middle hole 11 is formed in the left end face of the valve seat 1, a virtual axis of the oil inlet middle hole 11 coincides with a virtual axis of the valve seat 1, a guide through hole 12 is formed in the center of the bottom of the oil inlet middle hole 11, and the guide through hole 12 and the oil inlet middle hole 11 are coaxially arranged; a plurality of oil inlet holes 13 are uniformly distributed on the circumferential surface of the valve seat 1, the axial direction of the oil inlet holes 13 is arranged along the radial direction of the oil inlet middle hole 11, and the inner end of each oil inlet hole 13 is opened on the hole wall of the oil inlet middle hole 11; the oil inlet middle hole 11 is composed of a counter bore section 111, a transition hole section 112 and a middle bore section 113 which are sequentially connected from left to right, the diameters of the counter bore section 111, the transition hole section 112 and the middle bore section 113 are sequentially reduced, the transition hole section 112 is composed of a first conical section 1121 and a second conical section 1122 from left to right, the taper of the first conical section 1121 is larger than that of the second conical section 1122, and an annular sealing surface is formed at the joint of the first conical section 1121 and the second conical section 1122;
the valve core 2 consists of a first cylindrical section 21, a transition conical section 22 and a guide cylindrical section 23 which are sequentially connected from left to right, the diameter of the first cylindrical section 21 is smaller than that of the counter bore section 111 and larger than that of the annular sealing surface, and the diameter of the guide cylindrical section 23 is matched with that of the guide through hole 12;
the spring seat 4 is a cylindrical structural body, and an annular step surface 41 for supporting a spring is arranged on the outer peripheral surface of the right end of the spring seat 4;
the guide cylindrical section 23 is sleeved in the guide through hole 12, the right end of the guide cylindrical section 23 extends out of the valve seat 1, the spring seat 4 is sleeved at the right end of the guide cylindrical section 23, the spring 3 is sleeved on the guide cylindrical section 23, the spring 3 is arranged between the spring seat 4 and the valve seat 1, the left end of the spring 3 is in contact with the right end of the valve seat 1, the right end of the spring 3 is in contact with the annular step surface 41, the spring seat 4 is axially fixed with the valve element 2, the spring 3 is a pressure spring, and the transition conical section 22 is in circumferential contact with the annular sealing surface under the action of restoring force of the spring 3.
In order to reduce stress concentrations, it is characterized in that a rounding is provided between the transition conical section 22 and the guide cylindrical section 23.
In order to improve the oil inlet effect, the oil inlet hole 13 is 4.
In order to facilitate the installation and fixation of the spring, the right end face of the valve seat 1 is provided with an annular groove 14, and the left end of the spring 3 is arranged in the annular groove 14.
As shown in figure 3, the axial direction of the oil inlet valve is installed according to the radial direction of the plunger, when the plunger moves downwards, fuel oil is sucked, the valve core moves leftwards under the action of negative pressure to open the oil inlet, when the plunger moves upwards, the valve core moves rightwards under the action of oil pressure and restoring force of the spring, and the fuel oil is pumped out.
Claims (5)
1. The utility model provides an inlet valve of automatically controlled high-pressure fuel feed pump which characterized in that: comprises a valve seat (1), a valve core (2), a spring (3) and a spring seat (4);
the valve seat (1) is a cylindrical structure, an oil inlet middle hole (11) is formed in the left end face of the valve seat (1), the virtual axis of the oil inlet middle hole (11) is overlapped with the virtual axis of the valve seat (1), a guide through hole (12) is formed in the center of the bottom of the oil inlet middle hole (11), and the guide through hole (12) and the oil inlet middle hole (11) are coaxially arranged; a plurality of oil inlet holes (13) are uniformly distributed on the circumferential surface of the valve seat (1), the axial direction of the oil inlet holes (13) is arranged along the radial direction of the oil inlet middle hole (11), and the inner end of each oil inlet hole (13) is opened on the hole wall of the oil inlet middle hole (11); the oil inlet middle hole (11) is composed of a counter bore section (111), a transition hole section (112) and a middle hole section (113) which are sequentially connected from left to right, the diameters of the counter bore section (111), the transition hole section (112) and the middle hole section (113) are sequentially reduced, the transition hole section (112) is composed of a first conical section (1121) and a second conical section (1122) from left to right, the taper of the first conical section (1121) is larger than that of the second conical section (1122), and an annular sealing surface is formed at the joint of the first conical section (1121) and the second conical section (1122);
the valve core (2) consists of a first cylindrical section (21), a transition conical section (22) and a guide cylindrical section (23) which are sequentially connected from left to right, the diameter of the first cylindrical section (21) is smaller than that of the counter bore section (111) and larger than that of the annular sealing surface, and the diameter of the guide cylindrical section (23) is matched with that of the guide through hole (12);
the spring seat (4) is a cylindrical structural body, and an annular step surface (41) for supporting a spring is arranged on the outer peripheral surface of the right end of the spring seat (4);
the guide cylindrical section (23) is sleeved in the guide through hole (12), the right end of the guide cylindrical section (23) extends out of the valve seat (1), the spring seat (4) is sleeved at the right end of the guide cylindrical section (23), the spring (3) is sleeved on the guide cylindrical section (23), the spring (3) is arranged between the spring seat (4) and the valve seat (1), the left end of the spring (3) is in contact with the right end of the valve seat (1), the right end of the spring (3) is in contact with the annular step surface (41), the spring seat (4) and the valve core (2) are axially fixed, the spring (3) is a pressure spring, and the transition conical section (22) is in circumferential contact with the annular sealing surface under the action of restoring force of the spring (3).
2. The inlet valve for an electrically controlled high pressure feed pump of claim 1, further comprising: a rounding is arranged between the transition conical section (22) and the guide cylindrical section (23).
3. The inlet valve of an electrically controlled high-pressure feed pump according to claim 1 or 2, characterized in that: the number of the oil inlet holes (13) is 4.
4. The inlet valve of an electrically controlled high-pressure feed pump according to claim 1 or 2, characterized in that: the right end face of the valve seat (1) is provided with an annular groove (14), and the left end of the spring (3) is arranged in the annular groove (14).
5. The inlet valve for an electrically controlled high pressure feed pump of claim 3, further comprising: the right end face of the valve seat (1) is provided with an annular groove (14), and the left end of the spring (3) is arranged in the annular groove (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220715218.5U CN216894700U (en) | 2022-03-30 | 2022-03-30 | Oil inlet valve of electric control high-pressure oil supply pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220715218.5U CN216894700U (en) | 2022-03-30 | 2022-03-30 | Oil inlet valve of electric control high-pressure oil supply pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216894700U true CN216894700U (en) | 2022-07-05 |
Family
ID=82192647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220715218.5U Active CN216894700U (en) | 2022-03-30 | 2022-03-30 | Oil inlet valve of electric control high-pressure oil supply pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216894700U (en) |
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2022
- 2022-03-30 CN CN202220715218.5U patent/CN216894700U/en active Active
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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: 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. |
|
| CP03 | Change of name, title or address |