CN216922322U - Oil inlet and outlet valve and high-pressure oil injection pump - Google Patents
Oil inlet and outlet valve and high-pressure oil injection pump Download PDFInfo
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- CN216922322U CN216922322U CN202220715865.6U CN202220715865U CN216922322U CN 216922322 U CN216922322 U CN 216922322U CN 202220715865 U CN202220715865 U CN 202220715865U CN 216922322 U CN216922322 U CN 216922322U
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- inlet valve
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- 238000002347 injection Methods 0.000 title claims abstract description 12
- 239000007924 injection Substances 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 78
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 106
- 239000000295 fuel oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides an oil inlet and outlet valve and a high-pressure oil injection pump, wherein the oil inlet and outlet valve consists of an oil outlet valve core, an oil outlet valve seat, an oil inlet valve spring, an oil inlet valve seat and an oil inlet valve core; the high-pressure oil injection pump adopts the oil inlet and outlet valve; the beneficial technical effects of the utility model are as follows: the oil inlet and outlet valve and the high-pressure oil injection pump are provided, the sealing part of the oil inlet and outlet valve is not sealed by a steel ball, the problem of impact of the steel ball on the seat surface of a sealing hole is solved, and the structural stability is improved.
Description
Technical Field
The utility model relates to an oil valve used on a high-pressure oil supply pump, in particular to an oil inlet and outlet valve and a high-pressure oil injection pump.
Background
Along with the implementation of the high-standard emission requirement of the diesel engine, the rail pressure requirement of the high-pressure common rail system is also improved, in order to meet the requirement of the oil supply efficiency of the high-pressure rail pump, the product is required to have good sealing performance, and the product is required to have the characteristics of high oil outlet pressure, high reaction speed, long service life, high reliability and the like, and meanwhile, the smooth and stable fuel oil is ensured, and no vortex or vibration exists. In the prior art, the oil inlet and the oil outlet are sealed by steel balls, the actual sealing surface between the steel ball and the corresponding sealing hole seat surface is not fixed in the actual work, especially the high-pressure oil outlet control steel ball can continuously generate impact between the steel ball and the sealing hole seat surface, so that the original sealing pair is damaged, and the sealing precision is difficult to stably ensure.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the background art, the utility model provides an oil inlet and outlet valve, which has the following structure: the oil inlet and outlet valve consists of an oil outlet valve core, an oil outlet valve seat, an oil inlet valve spring, an oil inlet valve seat and an oil inlet valve core;
the oil outlet valve core consists of an upper cylinder (for arranging an oil outlet valve spring), a first sealing cone, a guide column and a lower cylinder; the lower column body is coaxially arranged on the lower end surface of the guide column, and the outer diameter of the lower column body is smaller than that of the guide column; a plurality of axial grooves are formed in the outer wall of the guide post; the upper end of the guide column is connected with the lower end of the first sealing cone through a cylindrical connecting section, the guide column, the cylindrical connecting section and the first sealing cone are coaxial, and the outer diameter of the cylindrical connecting section is smaller than that of the guide column; the diameter of the lower end of the first sealing cone is matched with that of the cylindrical connecting section, and the diameter of the upper end of the first sealing cone is larger than the outer diameter of the guide column; the upper end and the lower end of the first sealing cone are transited through a first conical surface; the upper cylinder is coaxially arranged on the upper end surface of the first sealing cone, and the diameter of the upper cylinder is smaller than that of the upper end of the first sealing cone;
an axial through hole is formed in the middle of the oil outlet valve seat, a first sealing surface matched with the first conical surface is arranged at the upper port of the axial through hole, the lower port of the axial through hole is a bell mouth, and the diameter of the middle of the axial through hole is matched with the outer diameter of the guide column;
the oil inlet valve core consists of a spring connecting column, a second sealing cone and a guide body; a plurality of axial oil inlet grooves are formed in the outer wall of the guide body; the upper end of the guide body is connected with the lower end of the second sealing cone through a cylindrical connector, and the second sealing cone, the guide body and the cylindrical connector are coaxial; the outer diameter of the guide body is larger than that of the cylindrical connecting body; the diameter of the lower end of the second sealing cone is matched with that of the cylindrical connecting body, and the diameter of the upper end of the second sealing cone is larger than the outer diameter of the guide body; the upper end and the lower end of the second sealing cone are transited through a second conical surface; the spring connecting column is coaxially arranged on the upper end face of the second sealing cone, and the diameter of the spring connecting column is smaller than that of the upper end of the second sealing cone;
a blind hole is formed in the middle of the upper end face of the oil inlet valve seat; a plurality of communicating holes are formed around the blind hole and axially communicate the oil inlet valve seat; the middle part of the oil inlet valve seat is provided with a plurality of radial holes, the blind holes are communicated with the outer wall of the oil inlet valve seat through the radial holes, and the radial holes and the communicating holes are arranged in a staggered manner; the inner diameter of the blind hole is matched with the outer diameter of the guide body, and a second sealing surface matched with the second conical surface is arranged at the upper port of the blind hole;
two first pin holes are formed in the lower end face of the oil outlet valve seat and are located on the periphery of the axial through hole; two second pin holes are formed in the upper end face of the oil inlet valve seat, are positioned on the periphery of the communication hole and do not interfere with the radial hole; the two first pin holes correspond to the two second pin holes one to one;
the lower end face of the oil outlet valve seat is contacted with the upper end face of the oil inlet valve seat, and positioning pins are arranged in the first pin hole and the second pin hole which are opposite in position; the communicating hole is covered by the horn mouth; the oil inlet valve core is arranged in the blind hole, and when the second conical surface is contacted with the second sealing surface, the oil inlet valve core shields the radial hole part; the oil outlet valve core is arranged in the axial through hole; when the first conical surface is contacted with the first sealing surface, the lower column body is positioned on the upper side of the bell mouth; when the oil inlet valve core and the oil outlet valve core are positioned at the maximum downward stroke position, a space is reserved between the lower cylinder and the spring connecting column; the lower end of the oil inlet valve spring is sleeved on the spring connecting column, the lower end of the oil inlet valve spring is in contact with the upper end face of the second sealing cone, the upper end of the oil inlet valve spring is sleeved on the lower column body, the upper end of the oil inlet valve spring is in contact with the lower end face of the guide column, and the oil inlet valve spring is in a pre-compression state.
The working principle of the utility model is as follows: referring to fig. 9, when in use, the plunger is installed in the plunger body and is pressed tightly by the oil outlet valve tight seat, an oil outlet valve spring (in a pre-compression state) is arranged between the oil outlet valve tight seat and the upper cylinder, and an oil inlet hole is arranged at a position on the plunger body corresponding to the position of the oil inlet valve seat; in an initial state, the oil inlet valve core and the oil outlet valve core are both positioned at the maximum downlink stroke position; high-pressure fuel oil flowing into the oil inlet can enter the blind hole through the radial hole, negative pressure is generated at the communicating hole and the horn mouth when the plunger moves downwards, and the high-pressure fuel oil in the blind hole jacks the oil inlet valve core and flows into the pressure storage cavity above the plunger through the communicating hole; when the plunger moves upwards, the negative pressure at the communicating hole and the bell mouth disappears, the oil inlet valve core falls under the action of the oil inlet valve spring to seal the upper end opening of the blind hole, the oil outlet valve core is jacked up under the action of high-pressure fuel oil, and the fuel oil flows outwards through the axial through hole on the oil outlet valve seat;
after the utility model is adopted, the corresponding parts (namely the first conical surface and the first sealing surface, the second conical surface and the second sealing surface) are not sealed by the steel ball any more, thereby thoroughly avoiding the impact of the steel ball on the sealing hole seat surface in the working process and effectively improving the structural stability.
Based on the oil inlet and outlet valve, the utility model further provides a high-pressure oil injection pump which adopts the oil inlet and outlet valve.
The beneficial technical effects of the utility model are as follows: the oil inlet and outlet valve and the high-pressure oil injection pump are provided, the sealing part of the oil inlet and outlet valve is not sealed by a steel ball, the problem of impact of the steel ball on the seat surface of a sealing hole is solved, and the structural stability is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of an oil inlet/outlet valve;
FIG. 2 is a schematic structural view of an oil outlet valve core;
FIG. 3 is a sectional view taken along line A-A in FIG. 2;
FIG. 4 is a schematic structural view of an oil outlet valve seat;
FIG. 5 is a schematic diagram of an oil inlet valve core structure;
FIG. 6 is a sectional view taken along line A-A in FIG. 5;
FIG. 7 is a schematic diagram of an oil inlet valve seat structure;
FIG. 8 is a sectional view taken along line A-A in FIG. 7;
FIG. 9 is a schematic view of the use state of the oil inlet and outlet valve;
FIG. 10 is a schematic sectional view of the high-pressure fuel injection pump;
the names corresponding to each mark in the figure are respectively: the oil outlet valve comprises an oil outlet valve core 1, an upper cylinder 11, a first sealing cone 12, a guide column 13, a lower cylinder 14, an axial groove 15, a cylindrical connecting section 16, an oil outlet valve seat 2, an oil inlet valve spring 3, an oil inlet valve seat 4, a blind hole 41, a communicating hole 42, a radial hole 43, an oil inlet valve core 5, a spring connecting column 51, a second sealing cone 52, a guide body 53, an oil inlet groove 54, a cylindrical connecting body 55, an oil outlet valve spring 6, an oil outlet valve tight seat 7, a plunger body 8, an oil inlet hole 81, a plunger 9, a cam 10, a roller body A and an oil inlet and outlet valve B.
Detailed Description
An oil inlet and outlet valve is structurally characterized in that: the oil inlet and outlet valve consists of an oil outlet valve core 1, an oil outlet valve seat 2, an oil inlet valve spring 3, an oil inlet valve seat 4 and an oil inlet valve core 5;
the oil outlet valve core 1 consists of an upper cylinder 11, a first sealing cone 12, a guide column 13 and a lower cylinder 14; the lower column 14 is coaxially arranged on the lower end surface of the guide column 13, and the outer diameter of the lower column 14 is smaller than that of the guide column 13; a plurality of axial grooves 15 are formed in the outer wall of the guide column 13; the upper end of the guide column 13 is connected with the lower end of the first sealing cone 12 through a cylindrical connecting section 16, the guide column 13, the cylindrical connecting section 16 and the first sealing cone 12 are coaxial, and the outer diameter of the cylindrical connecting section 16 is smaller than that of the guide column 13; the diameter of the lower end of the first sealing cone 12 is matched with that of the cylindrical connecting section 16, and the diameter of the upper end of the first sealing cone 12 is larger than the outer diameter of the guide column 13; the upper end and the lower end of the first sealing cone 12 are transited through a first conical surface; the upper cylinder 11 is coaxially arranged on the upper end face of the first sealing cone 12, and the diameter of the upper cylinder 11 is smaller than that of the upper end of the first sealing cone 12;
an axial through hole is formed in the middle of the oil outlet valve seat 2, a first sealing surface matched with the first conical surface is arranged at the upper end opening of the axial through hole, the lower end opening of the axial through hole is a bell mouth, and the diameter of the middle of the axial through hole is matched with the outer diameter of the guide column 13;
the oil inlet valve core 5 consists of a spring connecting column 51, a second sealing cone 52 and a guide body 53; a plurality of axial oil inlet grooves 54 are formed in the outer wall of the guide body 53; the upper end of the guide body 53 is connected with the lower end of the second sealing cone 52 through a cylindrical connecting body 55, and the second sealing cone 52, the guide body 53 and the cylindrical connecting body 55 are coaxial; the outer diameter of the guide body 53 is larger than that of the cylindrical connecting body 55; the diameter of the lower end of the second sealing cone 52 is matched with that of the cylindrical connecting body 55, and the diameter of the upper end of the second sealing cone 52 is larger than the outer diameter of the guide body 53; the upper and lower ends of the second sealing cone 52 transition through a second conical surface; the spring connecting column 51 is coaxially arranged on the upper end face of the second sealing cone 52, and the diameter of the spring connecting column 51 is smaller than that of the upper end of the second sealing cone 52;
a blind hole 41 is formed in the middle of the upper end face of the oil inlet valve seat 4; a plurality of communicating holes 42 are formed around the blind hole 41, and the communicating holes 42 axially communicate the oil inlet valve seat 4; the middle part of the oil inlet valve seat 4 is provided with a plurality of radial holes 43, the blind hole 41 is communicated with the outer wall of the oil inlet valve seat 4 through the radial holes 43, and the radial holes 43 and the communicating holes 42 are arranged in a staggered mode; the inner diameter of the blind hole 41 is matched with the outer diameter of the guide body 53, and a second sealing surface matched with the second conical surface is arranged at the upper end opening of the blind hole 41;
two first pin holes are formed in the lower end face of the oil outlet valve seat 2 and are located on the periphery of the axial through hole; two second pin holes are formed in the upper end face of the oil inlet valve seat 4, are located on the periphery of the communication hole 42 and do not interfere with the radial hole 43; the two first pin holes correspond to the two second pin holes one to one;
the lower end face of the oil outlet valve seat 2 is contacted with the upper end face of the oil inlet valve seat 4, and positioning pins are arranged in the first pin hole and the second pin hole which are opposite in position; the communication hole 42 is covered by the bell mouth; the oil inlet valve core 5 is arranged in the blind hole 41, and when the second conical surface is contacted with the second sealing surface, the oil inlet valve core 5 partially shields the radial hole 43; the oil outlet valve core 1 is arranged in the axial through hole; when the first conical surface is contacted with the first sealing surface, the lower column body 14 is positioned at the upper side of the bell mouth; when the oil inlet valve core 5 and the oil outlet valve core 1 are positioned at the maximum downward stroke position, a space is reserved between the lower cylinder 14 and the spring connecting column 51; the lower end of the oil inlet valve spring 3 is sleeved on the spring connecting column 51, the lower end of the oil inlet valve spring 3 is in contact with the upper end face of the second sealing cone 52, the upper end of the oil inlet valve spring 3 is sleeved on the lower column body 14, the upper end of the oil inlet valve spring 3 is in contact with the lower end face of the guide column 13, and the oil inlet valve spring 3 is in a pre-compression state.
The high-pressure fuel injection pump adopts the fuel inlet and outlet valve.
Claims (2)
1. An oil inlet and outlet valve is characterized in that: the oil inlet and outlet valve consists of an oil outlet valve core (1), an oil outlet valve seat (2), an oil inlet valve spring (3), an oil inlet valve seat (4) and an oil inlet valve core (5);
the oil outlet valve core (1) consists of an upper cylinder (11), a first sealing cone (12), a guide column (13) and a lower cylinder (14); the lower column body (14) is coaxially arranged on the lower end surface of the guide column (13), and the outer diameter of the lower column body (14) is smaller than that of the guide column (13); a plurality of axial grooves (15) are arranged on the outer wall of the guide column (13); the upper end of the guide column (13) is connected with the lower end of the first sealing cone (12) through a cylindrical connecting section (16), the guide column (13), the cylindrical connecting section (16) and the first sealing cone (12) are coaxial, and the outer diameter of the cylindrical connecting section (16) is smaller than that of the guide column (13); the diameter of the lower end of the first sealing cone (12) is matched with that of the cylindrical connecting section (16), and the diameter of the upper end of the first sealing cone (12) is larger than the outer diameter of the guide column (13); the upper end and the lower end of the first sealing cone (12) are transited through a first conical surface; the upper cylinder (11) is coaxially arranged on the upper end surface of the first sealing cone (12), and the diameter of the upper cylinder (11) is smaller than that of the upper end of the first sealing cone (12);
an axial through hole is formed in the middle of the oil outlet valve seat (2), a first sealing surface matched with the first conical surface is arranged at the upper port of the axial through hole, the lower port of the axial through hole is a bell mouth, and the diameter of the middle of the axial through hole is matched with the outer diameter of the guide column (13);
the oil inlet valve core (5) consists of a spring connecting column (51), a second sealing cone (52) and a guide body (53); a plurality of axial oil inlet grooves (54) are formed in the outer wall of the guide body (53); the upper end of the guide body (53) is connected with the lower end of the second sealing cone (52) through a cylindrical connecting body (55), and the second sealing cone (52), the guide body (53) and the cylindrical connecting body (55) are coaxial; the outer diameter of the guide body (53) is larger than that of the cylindrical connecting body (55); the diameter of the lower end of the second sealing cone (52) is matched with that of the cylindrical connecting body (55), and the diameter of the upper end of the second sealing cone (52) is larger than the outer diameter of the guide body (53); the upper end and the lower end of the second sealing cone (52) are transited through a second conical surface; the spring connecting column (51) is coaxially arranged on the upper end face of the second sealing cone (52), and the diameter of the spring connecting column (51) is smaller than that of the upper end of the second sealing cone (52);
a blind hole (41) is formed in the middle of the upper end face of the oil inlet valve seat (4); a plurality of communicating holes (42) are formed around the blind hole (41), and the communicating holes (42) axially communicate the oil inlet valve seat (4); the middle part of the oil inlet valve seat (4) is provided with a plurality of radial holes (43), the blind hole (41) is communicated with the outer wall of the oil inlet valve seat (4) through the radial holes (43), and the radial holes (43) and the communicating holes (42) are arranged in a staggered mode; the inner diameter of the blind hole (41) is matched with the outer diameter of the guide body (53), and a second sealing surface matched with the second conical surface is arranged at the upper port of the blind hole (41);
two first pin holes are formed in the lower end face of the oil outlet valve seat (2), and the first pin holes are located on the periphery of the axial through hole; two second pin holes are formed in the upper end face of the oil inlet valve seat (4), the second pin holes are located on the periphery of the communicating hole (42), and the second pin holes and the radial holes (43) are not interfered with each other; the two first pin holes correspond to the two second pin holes one to one;
the lower end face of the oil outlet valve seat (2) is contacted with the upper end face of the oil inlet valve seat (4), and positioning pins are arranged in a first pin hole and a second pin hole which are opposite in position; the communicating hole (42) is covered by the horn mouth; the oil inlet valve core (5) is arranged in the blind hole (41), and when the second conical surface is contacted with the second sealing surface, the oil inlet valve core (5) partially shields the radial hole (43); the oil outlet valve core (1) is arranged in the axial through hole; when the first conical surface is contacted with the first sealing surface, the lower column body (14) is positioned at the upper side of the bell mouth; when the oil inlet valve core (5) and the oil outlet valve core (1) are positioned at the maximum downward stroke position, a space is reserved between the lower cylinder (14) and the spring connecting column (51); the lower end of the oil inlet valve spring (3) is sleeved on the spring connecting column (51), the lower end of the oil inlet valve spring (3) is in contact with the upper end face of the second sealing cone (52), the upper end of the oil inlet valve spring (3) is sleeved on the lower column body (14), the upper end of the oil inlet valve spring (3) is in contact with the lower end face of the guide column (13), and the oil inlet valve spring (3) is in a pre-compression state.
2. A high pressure fuel injection pump, comprising: the high-pressure oil injection pump adopts the oil inlet and outlet valve of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220715865.6U CN216922322U (en) | 2022-03-30 | 2022-03-30 | Oil inlet and outlet valve and high-pressure oil injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220715865.6U CN216922322U (en) | 2022-03-30 | 2022-03-30 | Oil inlet and outlet valve and high-pressure oil injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216922322U true CN216922322U (en) | 2022-07-08 |
Family
ID=82228302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220715865.6U Active CN216922322U (en) | 2022-03-30 | 2022-03-30 | Oil inlet and outlet valve and high-pressure oil injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216922322U (en) |
-
2022
- 2022-03-30 CN CN202220715865.6U patent/CN216922322U/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. |
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| CP03 | Change of name, title or address |