CN216342615U - Novel pump oil system of high-pressure pump - Google Patents
Novel pump oil system of high-pressure pump Download PDFInfo
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- CN216342615U CN216342615U CN202122557446.2U CN202122557446U CN216342615U CN 216342615 U CN216342615 U CN 216342615U CN 202122557446 U CN202122557446 U CN 202122557446U CN 216342615 U CN216342615 U CN 216342615U
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Abstract
The utility model provides a novel oil pumping system of a high-pressure pump, which comprises a plunger sleeve, an accumulator and a valve seat, wherein one end of the valve seat is hermetically connected with the plunger sleeve, the other end of the valve seat is hermetically connected with the accumulator, the two sealing surfaces are high-pressure sealing surfaces, and compared with the existing high-pressure pump which is provided with an oil inlet valve seat and an oil outlet valve seat at the same time, the novel oil pumping system of the high-pressure pump can reduce the high-pressure sealing surface between one oil inlet valve seat and one oil outlet valve seat, greatly reduce the leakage amount and improve the oil pumping efficiency of the high-pressure pump.
Description
Technical Field
The utility model belongs to the technical field of high-pressure pumps, and particularly relates to a novel pump oil system of a high-pressure pump.
Background
The pump oil system structure on current high-pressure pump needs to set up oil outlet valve (including the disk seat that produces oil, the case that produces oil and the valve spring that produces oil) alone in the department that produces oil of high-pressure oil, and the working process is: in the descending process of the plunger, the pressure difference overcomes the oil inlet valve spring, the oil inlet valve core opens for oil passing and enters the cavity above the plunger, after the plunger ascends to press oil, the oil inlet valve core is closed under the pressure of the oil inlet valve spring and high-pressure oil, the high-pressure oil overcomes the pretightening force of the oil outlet valve spring and pushes the oil outlet valve core open to output the high-pressure oil.
Because the structure of the existing high-pressure pump is complex, the production cost is high, the oil pumping efficiency is low, three high-pressure sealing surfaces exist, the leakage amount is large, and the oil pumping efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a novel pump oil system of a high-pressure pump, which reduces the production cost and improves the pump oil efficiency by simplifying the structure of the pump oil system of the high-pressure pump. The technical scheme adopted by the utility model is as follows:
a novel oil pumping system of a high-pressure pump comprises a plunger sleeve, an accumulator and a valve seat, wherein one end of the valve seat is hermetically connected with the plunger sleeve, and the other end of the valve seat is hermetically connected with the accumulator;
a plunger sleeve high-pressure cavity is formed in the plunger sleeve;
a pressure accumulator high-pressure cavity is formed in the pressure accumulator;
a valve seat low-pressure cavity is formed in the valve seat, and an oil inlet valve core is connected in the low-pressure cavity in a sliding manner;
the oil inlet valve core is in clearance fit with the valve seat, and the low-pressure cavity of the valve seat and the high-pressure cavity of the plunger sleeve can be controlled to be communicated or cut off by the contact or the distance between the oil inlet valve core and the valve seat;
a valve core oil outlet hole is formed in the oil inlet valve core and used for communicating the plunger sleeve high-pressure cavity with the pressure accumulator high-pressure cavity;
and the connection part of the plunger sleeve high-pressure cavity and the pressure accumulator high-pressure cavity is controlled to be on or off through an oil outlet valve core.
Furthermore, the valve seat is positioned in the plunger sleeve, and the contact surface of the valve seat and the plunger sleeve is in sealing connection; an annular low-pressure cavity is formed between the valve seat and the plunger sleeve.
Furthermore, the top surface of the valve seat is higher than the end surface of the plunger sleeve, and the top surface of the valve seat is connected with the pressure accumulator in a sealing mode.
Furthermore, at least one plunger sleeve oil inlet hole is formed in the plunger sleeve and is used for communicating the annular low-pressure cavity with an external oil tank.
Furthermore, the valve seat is provided with at least one valve seat oil inlet hole, and the valve seat oil inlet hole is used for communicating the annular low-pressure cavity and the valve seat low-pressure cavity.
Further, a plunger is slidably connected in the plunger sleeve, and the plunger part is positioned in the high-pressure cavity of the plunger sleeve;
the plunger comprises a first state and a second state;
in the first state, the plunger moves towards the direction far away from the oil inlet valve core, so that oil is sucked into the plunger sleeve high-pressure cavity under the action of negative pressure;
in the second state, the plunger moves towards the direction close to the oil inlet valve core to pressurize oil in the plunger sleeve high-pressure cavity, so that the oil passes through the valve core oil outlet and enters the pressure accumulator high-pressure cavity.
Further, an oil inlet valve spring is arranged in the plunger sleeve high-pressure cavity and can push the oil inlet valve core to be attached to the valve seat;
the oil inlet valve spring comprises a first working state and a second working state,
in the first working state, the oil inlet valve core compresses the oil inlet valve spring and is far away from the valve seat, so that the low-pressure cavity of the valve seat is communicated with the high-pressure cavity of the plunger sleeve;
and in the second working state, the oil inlet valve core is close to the valve seat under the elastic force action of the oil inlet valve spring, so that the low-pressure cavity of the valve seat is communicated with the high-pressure cavity of the plunger sleeve in a cutting mode.
Furthermore, an oil outlet valve spring is arranged in the pressure accumulator high-pressure cavity and can push the oil outlet valve core to be attached to the valve seat;
the oil outlet valve spring comprises a third working state and a fourth working state,
in the third working state, the oil outlet valve core compresses the oil outlet valve spring and is far away from the valve seat, so that the plunger sleeve high-pressure cavity is communicated with the pressure accumulator high-pressure cavity;
in the fourth working state, the oil outlet valve core is close to the valve seat under the elastic force action of the oil outlet valve spring, so that the plunger sleeve high-pressure cavity is disconnected and communicated with the pressure accumulator high-pressure cavity.
Furthermore, the oil outlet valve core is a steel ball and is attached to the conical surface of the valve seat.
The utility model has the advantages that:
1) the oil pumping system has the advantages that the hole in the oil inlet valve core replaces the original oil outlet valve seat to upwards feed high-pressure oil, the structure is simple and compact, and the production cost is reduced.
2) The oil pumping system reduces the number of high-pressure sealing surfaces from three in the prior structure to two, and only two end surfaces of the valve seat are high-pressure sealing surfaces, so that the sealing cost is reduced; meanwhile, the leakage amount is reduced, and the oil pumping efficiency is improved.
Drawings
Fig. 1 is a sectional view of a pumping system of a novel high-pressure pump according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view of a pumping system of a novel high-pressure pump according to an embodiment of the present invention.
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.
As shown in fig. 1, the novel oil pumping system of the high-pressure pump according to the embodiment of the present invention includes a plunger sleeve 1, a pressure accumulator 2, and a valve seat 3, wherein one end of the valve seat 3 is hermetically connected to the plunger sleeve 1, and the other end of the valve seat 3 is hermetically connected to the pressure accumulator 2, and both the two sealing surfaces are high-pressure sealing surfaces.
A plunger sleeve high-pressure cavity 101 is formed in the plunger sleeve 1; an accumulator high-pressure cavity 201 is formed in the accumulator 2; a valve seat low-pressure cavity 301 is formed in the valve seat 3, and an oil inlet valve core 4 is connected in the low-pressure cavity 301 in a sliding manner; the oil inlet valve core 4 is in clearance fit with the valve seat 3, and the low-pressure cavity 301 of the valve seat and the high-pressure cavity 101 of the plunger sleeve can be controlled to be cut off or communicated by the contact or the separation of the oil inlet valve core 4 and the valve seat 3; a spool oil outlet 401 is formed in the oil inlet spool 4 and is used for communicating the plunger sleeve high-pressure cavity 101 with the pressure accumulator high-pressure cavity 201; the connection between the plunger sleeve high-pressure cavity 101 and the accumulator high-pressure cavity 201 is controlled by an oil outlet valve core 5.
A plunger 9 is slidably connected in the plunger sleeve 1, and the plunger 9 is partially positioned in the plunger sleeve high-pressure cavity 101; the plunger 9 comprises a first state and a second state;
in the first state, the plunger 9 moves away from the oil inlet valve core 4, so that oil is sucked into the plunger sleeve high-pressure cavity 101 under the action of negative pressure;
in the second state, the plunger 9 moves towards the direction close to the oil inlet valve core 4, and pressurizes the oil in the plunger sleeve high-pressure cavity 101, so that the oil passes through the valve core oil outlet 401 and enters the accumulator high-pressure cavity 201.
When oil is fed (corresponding to the first state of the plunger 9), the plunger 9 moves downwards, negative pressure is generated in the plunger sleeve high-pressure cavity 101, the oil feeding valve core 4 moves downwards (namely, is far away from the valve seat 3) due to pressure difference, the valve seat low-pressure cavity 301 is communicated with the plunger sleeve high-pressure cavity 101, low-pressure oil enters the plunger sleeve high-pressure cavity 101, when the plunger 9 moves to a lower dead point, the pressure difference is gradually reduced until the pressure difference is not reduced, the oil feeding valve core 4 moves upwards (namely, is close to the valve seat 3) until the oil feeding valve core is attached to the valve seat 3, and the oil feeding process is finished.
When oil is discharged (corresponding to the second state of the plunger 9), the plunger 9 moves upwards, high pressure is generated in the plunger sleeve high-pressure cavity 101, the oil inlet valve core 4 cuts off the communication between the valve seat low-pressure cavity 301 and the plunger sleeve high-pressure cavity 101 under the action of high-pressure oil, along with the continuous upward movement of the plunger 9, high-pressure oil moves upwards from the valve core oil outlet 401 until the oil outlet valve core 5 is pushed to move upwards (namely, away from the valve seat 3) to discharge oil, at the moment, the high-pressure oil flows into the pressure accumulator high-pressure cavity 201 through the valve core oil outlet 401, the plunger 9 moves to the top dead center, the pressure of the high-pressure oil in the plunger sleeve high-pressure cavity 101 and the valve core oil outlet 401 does not rise any more, the oil outlet valve core 5 falls (namely, is close to the valve seat 3) until being attached to the valve seat 3, and the oil discharge process is finished.
Specifically, as shown in fig. 1 and 2, the valve seat 3 is located in the plunger sleeve 1, and is in sealed connection with the contact surface of the plunger sleeve 1; an annular low-pressure cavity 6 is formed between the valve seat 3 and the plunger sleeve 1.
Furthermore, at least one plunger sleeve oil inlet hole 7 is formed in the plunger sleeve 1, and the plunger sleeve oil inlet hole 7 is used for communicating the annular low-pressure cavity 6 with an external oil tank, so that oil liquid in the oil tank is introduced into the annular low-pressure cavity 6.
Further, at least one valve seat oil inlet hole 8 is formed in the valve seat 3, and the valve seat oil inlet hole 8 is used for communicating the annular low-pressure cavity 6 with the valve seat low-pressure cavity 301, so that oil can be conveniently introduced into the valve seat low-pressure cavity 301 from the annular low-pressure cavity 6.
In some embodiments, the top surface of the valve seat 3 is higher than the end surface of the plunger sleeve 1, and the top surface of the valve seat 3 is in sealed connection with the pressure accumulator 2, and since the contact surface between the top surface of the valve seat 3 and the pressure accumulator 2 is a high-pressure sealing surface, when the top surface of the valve seat 3 is higher than the end surface of the plunger sleeve 1, the installation of a sealing element can be facilitated, and the sealing performance can be further improved.
In some embodiments, an oil inlet valve spring 10 is arranged in the plunger bushing high-pressure cavity 101, and the oil inlet valve spring 10 can push the oil inlet valve core 4 to be attached to the valve seat 3; the inlet valve spring 10 includes a first operating state and a second operating state,
in the first working state, the oil inlet valve core 4 compresses the oil inlet valve spring 10 under the action of negative pressure and is far away from the valve seat 3, so that the valve seat low-pressure cavity 301 is communicated with the plunger sleeve high-pressure cavity 101;
in the second working state, the oil inlet valve core 4 is close to the valve seat 3 under the combined action of the elastic force of the oil inlet valve spring 10 and high-pressure oil in the plunger sleeve high-pressure cavity 101, so that the valve seat low-pressure cavity 301 is disconnected from the plunger sleeve high-pressure cavity 101.
In some embodiments, an oil outlet valve spring 11 is disposed in the accumulator high-pressure chamber 201, and the oil outlet valve spring 11, one end of which is disposed in a spring seat, and the other end of which is in contact with the oil outlet valve core 5, can push the oil outlet valve core 5 to fit the valve seat 3; the delivery valve spring 11 includes a third operating condition and a fourth operating condition,
in the third working state, the oil outlet valve core 5 compresses the oil outlet valve spring 11 under the action of high-pressure oil in the valve core oil outlet hole 401, and is far away from the valve seat 3, so that the plunger sleeve high-pressure cavity 101 is communicated with the accumulator high-pressure cavity 201;
in the fourth operating state, the oil outlet valve core 5 is close to the valve seat 3 under the combined action of the elastic force of the oil outlet valve spring 11 and the high-pressure oil in the accumulator high-pressure chamber 201, so that the plunger sleeve high-pressure chamber 101 is cut off from the accumulator high-pressure chamber 201.
In some embodiments, the oil outlet valve core 5 is a steel ball, and is attached to the conical surface of the valve seat 3, so that the sealing performance is better than that of a plane contact.
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 (9)
1. The pumping oil system of the novel high-pressure pump is characterized by comprising a plunger sleeve (1), a pressure accumulator (2) and a valve seat (3), wherein one end of the valve seat (3) is hermetically connected with the plunger sleeve (1), and the other end of the valve seat is hermetically connected with the pressure accumulator (2);
a plunger sleeve high-pressure cavity (101) is arranged in the plunger sleeve (1);
a pressure accumulator high-pressure cavity (201) is arranged in the pressure accumulator (2);
a valve seat low-pressure cavity (301) is formed in the valve seat (3), and an oil inlet valve core (4) is connected in the low-pressure cavity (301) in a sliding manner;
the oil inlet valve core (4) is in clearance fit with the valve seat (3), and the low-pressure cavity (301) of the valve seat can be controlled to be cut off or communicated with the high-pressure cavity (101) of the plunger sleeve by the contact or the distance between the oil inlet valve core (4) and the valve seat (3);
a spool oil outlet hole (401) is formed in the oil inlet spool (4) and is used for communicating the plunger sleeve high-pressure cavity (101) with the pressure accumulator high-pressure cavity (201);
the connection between the plunger sleeve high-pressure cavity (101) and the accumulator high-pressure cavity (201) is controlled by an oil outlet valve core (5).
2. The pumping oil system of a new high pressure pump according to claim 1,
the valve seat (3) is positioned in the plunger sleeve (1), and the contact surface of the valve seat and the plunger sleeve (1) is in sealing connection; an annular low-pressure cavity (6) is formed between the valve seat (3) and the plunger sleeve (1).
3. The pumping oil system of a new high pressure pump according to claim 2,
the top surface of the valve seat (3) is higher than the end surface of the plunger sleeve (1), and the top surface of the valve seat (3) is connected with the pressure accumulator (2) in a sealing mode.
4. The pumping oil system of a new high pressure pump according to claim 2,
at least one plunger sleeve oil inlet hole (7) is formed in the plunger sleeve (1), and the plunger sleeve oil inlet hole (7) is used for communicating the annular low-pressure cavity (6) with an external oil tank.
5. The pumping oil system of a new high pressure pump according to claim 2,
and the valve seat (3) is provided with at least one valve seat oil inlet hole (8), and the valve seat oil inlet hole (8) is used for communicating the annular low-pressure cavity (6) with the valve seat low-pressure cavity (301).
6. The pumping oil system of a new high pressure pump according to claim 1,
a plunger (9) is connected in the plunger sleeve (1) in a sliding manner, and the plunger (9) is partially positioned in the plunger sleeve high-pressure cavity (101);
the plunger (9) comprises a first state and a second state;
in the first state, the plunger (9) moves towards a direction away from the oil inlet valve core (4), so that oil is sucked into the plunger sleeve high-pressure cavity (101) under the action of negative pressure;
in the second state, the plunger (9) moves towards the direction close to the oil inlet valve core (4) to pressurize oil in the plunger sleeve high-pressure cavity (101), so that the oil passes through the valve core oil outlet (401) and enters the pressure accumulator high-pressure cavity (201).
7. The pumping oil system of a new high pressure pump according to claim 1,
an oil inlet valve spring (10) is arranged in the plunger sleeve high-pressure cavity (101), and the oil inlet valve spring (10) can push the oil inlet valve core (4) to be attached to the valve seat (3);
the oil inlet valve spring (10) comprises a first working state and a second working state,
in the first working state, the oil inlet valve core (4) compresses the oil inlet valve spring (10) and is far away from the valve seat (3), so that the valve seat low-pressure cavity (301) is communicated with the plunger sleeve high-pressure cavity (101);
in the second working state, the oil inlet valve core (4) is close to the valve seat (3) under the elastic force action of the oil inlet valve spring (10), so that the valve seat low-pressure cavity (301) is communicated with the plunger sleeve high-pressure cavity (101) in a cutting mode.
8. The pumping oil system of a new high pressure pump according to claim 1,
an oil outlet valve spring (11) is arranged in the pressure accumulator high-pressure cavity (201), and the oil outlet valve spring (11) can push the oil outlet valve core (5) to be attached to the valve seat (3);
the oil outlet valve spring (11) comprises a third working state and a fourth working state,
in the third working state, the oil outlet valve core (5) compresses the oil outlet valve spring (11) and is far away from the valve seat (3), so that the plunger sleeve high-pressure cavity (101) is communicated with the accumulator high-pressure cavity (201);
in the fourth working state, the oil outlet valve core (5) is close to the valve seat (3) under the elastic force of the oil outlet valve spring (11), so that the plunger sleeve high-pressure cavity (101) is disconnected from the accumulator high-pressure cavity (201).
9. The pumping oil system of a new high pressure pump according to claim 1,
the oil outlet valve core (5) is a steel ball and is attached to the conical surface of the valve seat (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557446.2U CN216342615U (en) | 2021-10-22 | 2021-10-22 | Novel pump oil system of high-pressure pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557446.2U CN216342615U (en) | 2021-10-22 | 2021-10-22 | Novel pump oil system of high-pressure pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216342615U true CN216342615U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122557446.2U Active CN216342615U (en) | 2021-10-22 | 2021-10-22 | Novel pump oil system of high-pressure pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216342615U (en) |
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2021
- 2021-10-22 CN CN202122557446.2U patent/CN216342615U/en active Active
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