CN216342526U - Plunger sleeve hoisting type oil pumping system of high-pressure oil supply pump - Google Patents
Plunger sleeve hoisting type oil pumping system of high-pressure oil supply pump Download PDFInfo
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- CN216342526U CN216342526U CN202123031139.7U CN202123031139U CN216342526U CN 216342526 U CN216342526 U CN 216342526U CN 202123031139 U CN202123031139 U CN 202123031139U CN 216342526 U CN216342526 U CN 216342526U
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Abstract
The utility model provides a plunger sleeve hoisting type pump oil system of a high-pressure oil supply pump, which comprises a pump body, a plunger sleeve, an accumulator and a screw, wherein the plunger sleeve is arranged in the pump body so as to facilitate fuel oil to enter the accumulator through pressurization; the accumulator is connected to the pump body to supply the pressurized fuel to the subsequent component; the screw penetrates through the pressure accumulator and is in threaded connection with the plunger sleeve, so that the plunger sleeve is hung on the pressure accumulator. This application simple structure is reliable, and the atress of the pump body is alleviateed in the hoist and mount of plunger bushing, improves the factor of safety of the pump body.
Description
Technical Field
The utility model relates to an oil supply pump structure, in particular to a plunger sleeve hoisting type pump oil system of a high-pressure oil supply pump.
Background
The pumping system is used for repeatedly pressurizing and supplying low-pressure fuel to subsequent components, and each sealing surface of the pumping system is continuously subjected to pulse pressure.
Plunger bushing mounting means in the common rail system pump oil system has two kinds at present: one is to connect the plunger sleeve and the pump body by screw thread, and the pump body and the pressure accumulator by screw thread, the structure has higher requirement for processing precision, the disassembly and the assembly are more complicated, the screwing torque of the plunger sleeve and the pulse pressure of the pump oil system can increase the risk of the deformation of the pump body;
the other mode is that make into an organic whole with plunger bushing and accumulator, has left out the relation of screw assembly, and structural though more reliable, the processing degree of difficulty is great, and the cost of manufacture is higher, can only wholly change when appearing plunger jamming trouble, and the maintenance degree of difficulty and cost are great.
Therefore, a pump oil system with easy assembly and disassembly and high safety coefficient of the pump body is needed to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump, which has a stable structure, can reduce the pressure fluctuation of a common rail system, avoids the influence of the tightening torque and the pulse pressure on the pump body, and improves the safety coefficient of the pump body. The technical scheme adopted by the utility model is as follows:
a plunger sleeve hoisting type pump oil system of a high-pressure oil supply pump comprises a pump body, a plunger sleeve, an accumulator and a screw, wherein the plunger sleeve is arranged in the pump body, so that fuel oil can conveniently enter the accumulator through pressurization; the accumulator is connected to the pump body to supply the pressurized fuel to the subsequent component; the screw penetrates through the pressure accumulator and is in threaded connection with the plunger sleeve, so that the plunger sleeve is hung on the pressure accumulator.
Furthermore, a plunger cavity is arranged on the plunger sleeve, a pressure storage cavity is arranged on the pressure accumulator, and a plunger, an oil inlet valve and an oil outlet valve are sequentially arranged along the plunger cavity from bottom to top;
the oil inlet valve and the oil outlet valve are in an opening state and a closing state, when the plunger descends, the oil inlet valve is opened, the oil outlet valve is closed, fuel enters the plunger cavity, when the plunger ascends, the oil inlet valve is closed, the pressure of the fuel in the plunger cavity rises, when the plunger continues to ascend until the pressure of the fuel is higher than that of the pressure accumulation cavity, the oil outlet valve is opened, and the fuel enters the pressure accumulation cavity.
The oil inlet valve comprises an oil inlet valve core and an oil inlet valve seat, wherein the oil inlet valve seat is provided with an oil inlet valve cavity, at least one low-pressure oil inlet hole and at least one high-pressure oil outlet hole, one end of the oil inlet valve cavity can be communicated with the plunger cavity, the oil inlet valve core extends into the oil inlet valve cavity, one end of the low-pressure oil inlet hole is communicated with the oil inlet valve cavity, the other end of the low-pressure oil inlet hole is communicated with a low-pressure fuel cavity in the pump body, one end of the high-pressure oil outlet hole is communicated with the plunger cavity, and the other end of the high-pressure oil outlet hole extends to the oil outlet valve;
when the oil inlet valve core moves downwards to be separated from the oil inlet valve seat, the oil inlet valve cavity is communicated with the plunger cavity, the oil inlet valve is opened, low-pressure fuel enters the plunger cavity from the low-pressure oil inlet hole and the oil inlet valve cavity, and when the oil inlet valve core moves upwards to abut against the oil inlet valve seat, the oil inlet valve cavity is disconnected from the plunger cavity, and the oil inlet valve is closed.
Furthermore, an oil inlet valve spring is arranged at one end, away from the oil inlet valve seat, of the oil inlet valve core, and the other end of the oil inlet valve spring abuts against the inner wall of the plunger cavity;
when the oil inlet valve is opened, the elastic force of the oil inlet valve spring is increased; when the oil inlet valve is closed, the elastic force of the oil inlet valve spring is reduced.
Further, a valve seat step is arranged in the plunger cavity, and one end of the oil inlet valve seat is abutted to the valve seat step to limit the position of the oil inlet valve seat.
Furthermore, the oil outlet valve comprises an oil outlet valve seat, one end of the oil outlet valve seat is abutted against the oil inlet valve seat, and the other end of the oil outlet valve seat is abutted against the pressure accumulator;
the oil outlet valve seat is provided with a sealing conical surface, an oil outlet valve steel ball is arranged at the sealing conical surface, and the oil outlet valve steel ball extends into the pressure accumulation cavity; and when the steel ball of the oil outlet valve is separated from the sealing conical surface, the oil outlet valve is opened.
Furthermore, a spring seat and an oil outlet valve spring are arranged in the pressure accumulation cavity, and two ends of the oil outlet valve spring are respectively connected with the spring seat and an oil outlet valve steel ball;
when the oil outlet valve seat is closed, the elastic force of the oil outlet valve spring is reduced, and when the oil outlet valve seat is opened, the elastic force of the oil outlet valve spring is increased.
Further, the pressure accumulator and the pump body are fixedly connected through bolts, and a first sealing ring is arranged between the pressure accumulator and the pump body.
Furthermore, a second sealing ring is arranged between the pressure accumulator and the plunger sleeve, and the second sealing ring is sleeved on the screw.
Furthermore, a third sealing ring is arranged on the plunger sleeve, and the outer surface of the third sealing ring abuts against the inner wall of the pump body.
The utility model has the advantages that:
according to the pump body, the plunger sleeve is hoisted to the pressure accumulator by screws, the plunger sleeve and the pump body are not in threaded connection, and the thread processing of the pump body is omitted, so that the pump body only plays a role in supporting the pressure accumulator, the pump body is prevented from bearing the tightening torque and the pulse pressure of the plunger sleeve, and the safety coefficient of the pump body is improved;
can be connected with accumulator with parts such as oil feed case and plunger cover portion dress again, reduce the assembly degree of difficulty, improve assembly efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-pump body, 2-plunger sleeve, 3-pressure accumulator, 4-screw, 5-oil inlet valve core, 6-oil inlet valve seat, 7-oil outlet valve seat, 8-oil inlet valve spring, 9-oil outlet valve steel ball, 10-spring seat, 11-oil outlet valve spring, 12-plunger, 101-low-pressure fuel oil cavity, 201-plunger cavity, 301-pressure accumulation cavity, 601-oil inlet valve cavity, 602-low-pressure oil inlet hole and 603-high-pressure oil outlet hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to the attached drawing 1, the utility model provides a plunger sleeve hoisting type oil pumping system of a high-pressure oil supply pump, which comprises a pump body 1, a plunger sleeve 2, an accumulator 3 and a screw 4, wherein the plunger sleeve 2 is arranged in the pump body 1, so that fuel oil can be conveniently pressurized and enter the accumulator 3; the accumulator 3 is connected to the pump body 1 to supply the pressurized fuel to the subsequent components; the screw 4 penetrates through the pressure accumulator 3 and is in threaded connection with the plunger sleeve 2, so that the plunger sleeve 2 is hung on the pressure accumulator 3.
Accumulator 3 is as the pressure accumulation part commonly used, possess the pressure accumulation function, can reduce the pressure oscillation of common rail system, because pump body 1 and plunger bushing 2's suit, make fixed connection between plunger bushing 2 and the accumulator 3, realize plunger bushing 2 hoist and mount on accumulator 3, torque is not screwed up between plunger bushing 2 and the pump body 1, plunger bushing 2 is directly used in accumulator 3 at the pulse pressure that pump oil system during operation produced, and the pump body only plays the purpose of supporting accumulator 3, so torque and pulse pressure are not screwed up, improve pump body 1's factor of safety, the assembly is also comparatively simple and convenient.
In the application, a plunger cavity 201 is arranged on the plunger sleeve 2, a pressure storage cavity 301 is arranged on the pressure accumulator 3, and a plunger 12, an oil inlet valve and an oil outlet valve are sequentially arranged along the plunger cavity 201 from bottom to top; the oil inlet valve and the oil outlet valve have opening and closing states, when the plunger 12 descends, the oil inlet valve is opened, the oil outlet valve is closed, fuel enters the plunger cavity 201, when the plunger ascends, the oil inlet valve is closed, the pressure of the fuel in the plunger cavity 201 rises, when the plunger 12 continues to ascend until the pressure of the fuel is higher than that of the pressure accumulation cavity 301, the oil outlet valve is opened, and the fuel enters the pressure accumulation cavity 301; the fuel is pressurized and delivered to the pressure accumulation chamber 301 by the cooperation of the plunger 12, the inlet valve and the outlet valve, and is supplied to the subsequent components by the accumulator 3.
The plunger 12 is in clearance fit with the plunger cavity 201, and one end of the plunger is connected with a driving part in an inner cavity of the oil supply pump, so that the plunger 12 can reciprocate.
In the application, the oil inlet valve comprises an oil inlet valve core 5 and an oil inlet valve seat 6, wherein an oil inlet valve cavity 601, at least one low-pressure oil inlet hole 602 and at least one high-pressure oil outlet hole 603 are arranged on the oil inlet valve seat 6, one end of the oil inlet valve cavity 601 can be communicated with the plunger cavity 201, the oil inlet valve core 5 extends into the oil inlet valve cavity 601, one end of the low-pressure oil inlet hole 602 is communicated with the oil inlet valve cavity 601, the other end of the low-pressure oil inlet hole 602 is used for being communicated with the low-pressure fuel oil cavity 101 in the pump body 1, one end of the high-pressure oil outlet hole 603 is communicated with the plunger cavity 201, and the other end of the high-pressure oil outlet hole 603 extends to the oil outlet valve; when the oil inlet valve core 5 moves downwards to be separated from the oil inlet valve seat 6, the oil inlet valve cavity 601 is communicated with the plunger cavity 201, the oil inlet valve is opened, low-pressure fuel enters the plunger cavity 201 from the low-pressure oil inlet hole 602 and the oil inlet valve cavity 601, when the oil inlet valve core 5 moves upwards to abut against the oil inlet valve seat 6, the oil inlet valve cavity 601 is disconnected from the plunger cavity 201, and the oil inlet valve is closed.
The low pressure fuel oil chamber sets up in the pump body 1 in this application, sets up the low pressure oil circuit that is connected with low pressure inlet port 602 on the plunger bushing 2, realizes the continuation of low pressure oil and supplies.
In order to facilitate the reciprocating motion of the oil inlet valve core 5 in the plunger cavity 201, one end, away from the oil inlet valve seat 6, of the oil inlet valve core 5 is provided with an oil inlet valve spring 8, and the other end of the oil inlet valve spring 8 abuts against the inner wall of the plunger cavity 201; when the oil inlet valve is opened, the elastic force of the oil inlet valve spring 8 is increased; when the inlet valve is closed, the elastic force of the inlet valve spring 8 is reduced.
In order to facilitate the positioning of the oil inlet valve seat 6 and reduce the assembly difficulty, a valve seat step 2011 is arranged in the plunger cavity 201, and one end of the oil inlet valve seat 6 is abutted to the valve seat step 2011 so as to limit the position of the oil inlet valve seat 6.
In the application, the oil outlet valve comprises an oil outlet valve seat 7, one end of the oil outlet valve seat 7 is abutted to the oil inlet valve seat 6, and the other end of the oil outlet valve seat 7 is abutted to the pressure accumulator 3; during assembly, the oil inlet valve core 5, the oil inlet valve seat 6 and the oil outlet valve seat 7 are sequentially placed into the plunger cavity 201, the oil inlet valve seat 6 is abutted to the valve seat step 2011, so that the position of the oil outlet valve seat 7 is positioned along with the positioning of the oil inlet valve seat 6, when the plunger sleeve 2 and the pressure accumulator 3 are connected, the oil inlet valve seat 6 and the oil outlet valve seat 7 are fixed in the plunger cavity 201, the assembly efficiency is improved, and meanwhile the position relation among all parts is guaranteed.
Furthermore, a sealing conical surface is arranged on the oil outlet valve seat 7, an oil outlet valve steel ball 9 is arranged at the sealing conical surface, and the oil outlet valve steel ball 9 extends into the pressure accumulation cavity 301; when the surface of the oil outlet valve steel ball 9 is attached to the sealing conical surface, the oil outlet valve is closed, and when the oil outlet valve steel ball 9 is separated from the sealing conical surface, the oil outlet valve is opened; the opening and closing of the oil outlet valve seat 7 are realized through the matching between the oil outlet valve steel ball 9 and the sealing conical surface, and then the on-off between the plunger cavity 201 and the pressure accumulation cavity 301 is controlled.
In order to limit the movement stroke of the oil outlet valve steel ball 9 and ensure the accuracy of opening and closing the oil outlet valve seat 7, a spring seat 10 and an oil outlet valve spring 11 are arranged in the pressure accumulation cavity 301, and two ends of the oil outlet valve spring 11 are respectively connected with the spring seat 10 and the oil outlet valve steel ball 9; when the oil outlet valve seat 7 is closed, the elastic force of the oil outlet valve spring 11 is reduced, and when the oil outlet valve seat 7 is opened, the elastic force of the oil outlet valve spring 11 is increased; the pressurized fuel pressure overcomes the elasticity of the oil outlet valve spring 11, the oil outlet valve steel ball 9 is jacked open until the oil outlet valve steel ball is separated from the sealing conical surface, and the high-pressure fuel in the plunger cavity 201 enters the pressure accumulation cavity 301 through the high-pressure oil outlet hole 603 and the oil outlet valve.
As an embodiment of the present application, the pressure accumulator 3 and the pump body 1 are fixedly connected by bolts, and a first sealing ring 13 is arranged between the pressure accumulator 3 and the pump body 1; thereby, the sealing performance between the pressure accumulator 3 and the pump body 1 is ensured, and the fuel oil leakage is prevented.
As an embodiment of the present application, a second sealing ring 14 is disposed between the pressure accumulator 3 and the plunger sleeve 2, and the second sealing ring 14 is sleeved on the screw 4; thereby, the sealing performance between the pressure accumulator 3 and the plunger sleeve 2 is ensured, and the fuel oil leakage is prevented.
According to the embodiment of the application, the plunger sleeve 2 is provided with the third sealing ring 15, and the outer surface of the third sealing ring 15 abuts against the inner wall of the pump body 1, so that the risk of fuel leakage is further reduced.
The working principle is as follows:
during assembly, the oil inlet valve spring 8, the oil inlet valve core 5, the oil inlet valve seat 6 and the oil outlet valve seat 7 are sequentially placed into the plunger cavity 201, the oil outlet valve steel ball 9 is placed on the sealing conical surface of the oil outlet valve seat 7, then the pressure accumulator 3 is arranged on the plunger sleeve 2, the oil outlet valve spring 11 is abutted to the oil outlet valve steel ball 9, the screw 4 is screwed, partial assembly is achieved, the oil outlet valve steel ball 9 presses the sealing conical surface on the oil outlet valve seat 7 under the elastic action of the oil outlet valve spring 11, the oil outlet valve seat 7 is in a closed state, the plunger sleeve 2 is placed into the pump body 1, the plunger 12 extends into the plunger cavity 201, the pump body 1 and the pressure accumulator 3 are connected, and assembly is completed.
When the plunger 12 works, the pressure of fuel in the plunger cavity 201 is reduced, the steel ball 9 of the oil outlet valve is abutted against the sealing conical surface under the pressure of the pressure accumulation cavity 301 and the action of the spring 11 of the oil outlet valve, the oil outlet valve is closed, low-pressure fuel overcomes the elasticity of the spring 8 of the oil inlet valve, the oil inlet valve core 5 leaves the oil inlet valve seat 6, the oil inlet valve is opened, and the low-pressure fuel enters the plunger cavity 201 through the low-pressure oil inlet hole 602 and the oil inlet valve cavity 601; when the plunger 12 moves upwards, the fuel in the plunger cavity 201 is compressed, when the oil pressure is higher than the pressure in the low-pressure fuel cavity, the oil inlet valve core 5 moves upwards to abut against the oil inlet valve seat 6, the oil inlet valve is closed, the fuel pressure in the plunger cavity 201 continues to rise, when the fuel pressure is higher than the pressure in the pressure accumulation cavity 301, the oil outlet valve steel ball 9 overcomes the elasticity of the oil outlet valve spring 11 to separate from the sealing conical surface, the oil outlet valve is opened, and the fuel in the plunger cavity 201 enters the pressure accumulation cavity 301 through the high-pressure oil outlet hole 603 and the oil outlet valve seat 7 to complete the pressurized delivery of the fuel.
In conclusion, the plunger sleeve 2 is hoisted, so that large pressing force of each sealing surface of parts in the pump oil system can be realized by using small screw torque, the stress condition of the pressure accumulator is optimized, the risk of bending deformation of the pressure accumulator is reduced, the risk of deformation of a pump body is reduced, and the sealing reliability of the pump oil system is improved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a plunger bushing hoist and mount formula pump oil system of high pressure fuel feed pump which characterized in that: the fuel oil pressure accumulator comprises a pump body (1), a plunger sleeve (2), a pressure accumulator (3) and a screw (4), wherein the plunger sleeve (2) is arranged inside the pump body (1) to facilitate the pressurization of fuel oil into the pressure accumulator (3); the pressure accumulator (3) is connected to the pump body (1) to supply the pressurized fuel to the subsequent component; the screw (4) penetrates through the pressure accumulator (3) and is in threaded connection with the plunger sleeve (2), so that the plunger sleeve (2) is hung on the pressure accumulator (3).
2. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 1, characterized in that: a plunger cavity (201) is formed in the plunger sleeve (2), a pressure storage cavity (301) is formed in the pressure accumulator (3), and a plunger (12), an oil inlet valve and an oil outlet valve are sequentially arranged along the plunger cavity (201) from bottom to top;
the oil inlet valve and the oil outlet valve are in an opening state and a closing state, when the plunger (12) moves downwards, the oil inlet valve is opened, the oil outlet valve is closed, fuel enters the plunger cavity (201), when the plunger moves upwards, the oil inlet valve is closed, the pressure of the fuel in the plunger cavity (201) is increased, when the plunger (12) continues to move upwards until the pressure of the fuel is higher than that of the pressure accumulation cavity (301), the oil outlet valve is opened, and the fuel enters the pressure accumulation cavity (301).
3. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 2, characterized in that:
the oil inlet valve comprises an oil inlet valve core (5) and an oil inlet valve seat (6), wherein an oil inlet valve cavity (601), at least one low-pressure oil inlet hole (602) and at least one high-pressure oil outlet hole (603) are formed in the oil inlet valve seat (6), one end of the oil inlet valve cavity (601) can be communicated with the plunger cavity (201), the oil inlet valve core (5) extends into the oil inlet valve cavity (601), one end of the low-pressure oil inlet hole (602) is communicated with the oil inlet valve cavity (601), the other end of the low-pressure oil inlet hole (602) is used for being communicated with a low-pressure fuel oil cavity (101) in the pump body (1) so that low-pressure fuel oil can flow in, one end of the high-pressure oil outlet hole (603) is communicated with the plunger cavity (201), and the other end of the high-pressure oil outlet hole (603) extends to the oil outlet valve;
when the oil inlet valve core (5) moves downwards to be separated from the oil inlet valve seat (6), the oil inlet valve cavity (601) is communicated with the plunger cavity (201), the oil inlet valve is opened, low-pressure fuel enters the plunger cavity (201) from the low-pressure oil inlet hole (602) and the oil inlet valve cavity (601), and when the oil inlet valve core (5) moves upwards to abut against the oil inlet valve seat (6), the oil inlet valve cavity (601) is disconnected from the plunger cavity (201), and the oil inlet valve is closed.
4. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 3, characterized in that: an oil inlet valve spring (8) is arranged at one end, away from the oil inlet valve seat (6), of the oil inlet valve core (5), and the other end of the oil inlet valve spring (8) abuts against the inner wall of the plunger cavity (201);
when the oil inlet valve is opened, the elastic force of the oil inlet valve spring (8) is increased; when the oil inlet valve is closed, the elastic force of the oil inlet valve spring (8) is reduced.
5. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 3 or 4, characterized in that: be provided with valve seat step (2011) in plunger chamber (201), oil feed valve seat (6) one end butt in valve seat step (2011) to the position of restriction oil feed valve seat (6).
6. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 3, characterized in that: the oil outlet valve comprises an oil outlet valve seat (7), one end of the oil outlet valve seat (7) is abutted against the oil inlet valve seat (6), and the other end of the oil outlet valve seat (7) is abutted against the pressure accumulator (3);
a sealing conical surface is arranged on the oil outlet valve seat (7), an oil outlet valve steel ball (9) is arranged at the sealing conical surface, and the oil outlet valve steel ball (9) extends into the pressure accumulation cavity (301); when the surface of the oil outlet valve steel ball (9) is attached to the sealing conical surface, the oil outlet valve is closed, and when the oil outlet valve steel ball (9) is separated from the sealing conical surface, the oil outlet valve is opened.
7. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 6, characterized in that: a spring seat (10) and an oil outlet valve spring (11) are arranged in the pressure accumulation cavity (301), and two ends of the oil outlet valve spring (11) are respectively connected with the spring seat (10) and an oil outlet valve steel ball (9);
when the oil outlet valve seat (7) is closed, the elastic force of the oil outlet valve spring (11) is reduced, and when the oil outlet valve seat (7) is opened, the elastic force of the oil outlet valve spring (11) is increased.
8. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 1, characterized in that: the pressure accumulator (3) and the pump body (1) are fixedly connected through bolts, and a first sealing ring (13) is arranged between the pressure accumulator (3) and the pump body (1).
9. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 1, characterized in that: and a second sealing ring (14) is arranged between the pressure accumulator (3) and the plunger sleeve (2), and the second sealing ring (14) is sleeved on the screw (4).
10. The plunger sleeve hoisting type pump oil system of the high-pressure oil supply pump according to claim 1, characterized in that: and a third sealing ring (15) is arranged on the plunger sleeve (2), and the outer surface of the third sealing ring (15) is abutted against the inner wall of the pump body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123031139.7U CN216342526U (en) | 2021-12-02 | 2021-12-02 | Plunger sleeve hoisting type oil pumping system of high-pressure oil supply pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123031139.7U CN216342526U (en) | 2021-12-02 | 2021-12-02 | Plunger sleeve hoisting type oil pumping system of high-pressure oil supply pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216342526U true CN216342526U (en) | 2022-04-19 |
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ID=81157440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123031139.7U Active CN216342526U (en) | 2021-12-02 | 2021-12-02 | Plunger sleeve hoisting type oil pumping system of high-pressure oil supply pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216342526U (en) |
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2021
- 2021-12-02 CN CN202123031139.7U patent/CN216342526U/en active Active
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