CN111076073A - Vane type two-stage variable oil pump - Google Patents
Vane type two-stage variable oil pump Download PDFInfo
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- CN111076073A CN111076073A CN201911352193.6A CN201911352193A CN111076073A CN 111076073 A CN111076073 A CN 111076073A CN 201911352193 A CN201911352193 A CN 201911352193A CN 111076073 A CN111076073 A CN 111076073A
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- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention relates to a vane type two-stage variable oil pump.A control oil cavity is communicated with a lubricating oil system of an engine; when the rotating speed of the vane oil pump is increased to increase the pressure of output oil and increase the pressure in the control oil cavity, the stator ring rotates towards one side of the spring cavity to compress the first pressure spring under the action of oil pressure in the control oil cavity, so that the displacement per revolution of the variable displacement pump is reduced; when the pressure in the control oil cavity exceeds a set value, the connecting block compresses the first pressure spring and the second pressure spring simultaneously. And in the process that the stator ring only compresses the first pressure spring, the vane oil pump is in a low-pressure control mode, and in the process that the stator ring simultaneously compresses the first pressure spring and the second pressure spring, the vane oil pump is in a high-pressure control mode.
Description
Technical Field
The invention relates to a vane type two-stage variable oil pump, in particular to a vane type two-stage variable oil pump for an automobile engine.
Background
The engine oil pump of the automobile engine is driven by the engine, in the process of increasing the rotating speed of the engine, the rotating speed of the engine oil pump is increased, the pressure of the output engine oil is increased, but the pressure of the engine oil required by a lubricating system of the automobile engine is increased along with the increase of the rotating speed of the engine, but is not linearly related to the rotating speed of the engine. The engine needs different engine oil amounts in different rotating speed ranges, and in order to enable the rotating speed of the engine to be adaptive to the output oil pressure of an engine oil pump, the output oil amount of the engine oil pump of the engine is generally controlled in two stages in the prior art. In order to meet the requirement of two-stage variables, the traditional two-stage variable oil pump can be completed only by the cooperative work of an electromagnetic valve and a mechanical valve. Such an approach is costly and not reliable enough.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a vane type two-stage variable oil pump, which can meet the requirement of the two-stage variable of the oil pump, and has low cost and reliable operation.
In order to achieve the purpose, the invention provides a vane type two-stage variable oil pump, which adopts the following technical scheme: a vane type two-stage variable oil pump comprises a pump seat, wherein a stator ring is arranged in an inner cavity of the pump seat, a rotor is accommodated in a pressure oil cavity of the stator ring, a rotating shaft of the rotor is fixedly connected with the pump seat relative to the pump seat, the pressure oil cavity is connected with an oil suction port and a pressure oil port of the vane oil pump, and the pressure oil port is used for supplying oil to a lubricating oil system of an engine;
the pump seat is characterized in that a cambered surface connecting groove is formed in an inner cavity of the pump seat, a cambered surface convex edge is arranged on the outer wall of the stator ring and is in running fit with the cambered surface connecting groove, a control oil cavity and a spring cavity are further formed in the pump seat, the control oil cavity is communicated with a lubricating oil system of an engine, a connecting block extends out of the outer wall of the stator ring, the connecting block is located between the control oil cavity and the spring cavity, a first pressure spring and a second pressure spring which are sleeved together are arranged in the spring cavity, one end of the first pressure spring abuts against the connecting block, and the other end of the first pressure spring abuts against the inner wall of the spring cavity; the first pressure spring is longer than the second pressure spring;
when the rotating speed of the variable displacement pump is increased, the oil pressure output by the oil pressure opening is increased, and the oil in the control oil cavity pushes the connecting block to overcome the pressure of the first pressure spring to rotate the stator ring, so that the displacement per revolution of the variable displacement pump is reduced; when the pressure in the control oil cavity exceeds a set value, the connecting block compresses the first pressure spring and the second pressure spring simultaneously.
Preferably, an avoidance space is arranged in the inner cavity of the pump base, when the rotating speed of the variable displacement pump is increased, the oil pressure output by the oil pressing port is increased, and the oil in the control oil cavity pushes the connecting block to overcome the pressure of the first pressure spring so as to enable the stator ring to rotate towards the avoidance space.
Preferably, the first compression spring is sleeved outside the second compression spring.
Preferably, a spring seat is connected to the inner wall of the spring cavity, the spring seat is provided with a connecting cavity, the second pressure spring is sleeved outside a guide rod, a first connector and a second connector are respectively arranged at two ends of the guide rod, the first connector is located in the connecting cavity, one end of the second pressure spring abuts against the second connector, and the other end of the second pressure spring abuts against the spring seat; and under the action of the second pressure spring, the first connecting head is pressed on the inner wall of the connecting cavity.
More preferably, during the process that the stator ring rotates towards the spring cavity, the stator ring compresses the first compression spring to a certain length and then contacts the second connector to compress the second compression spring.
More preferably, the first connector has a gap with the bottom of the connection chamber.
Preferably, the oil suction port and the oil pressing port are arranged on the pump seat.
As described above, the vane type two-stage variable oil pump according to the present invention has the following advantageous effects: in the vane type two-stage variable oil pump, the control oil cavity is communicated with a lubricating oil system of an engine; when the rotating speed of the vane oil pump is increased to increase the pressure of output oil and increase the pressure in the control oil cavity, the stator ring rotates towards one side of the spring cavity to compress the first pressure spring under the action of oil pressure in the control oil cavity, so that the displacement per revolution of the variable displacement pump is reduced; when the pressure in the control oil cavity exceeds a set value, the connecting block compresses the first pressure spring and the second pressure spring simultaneously. And in the process that the stator ring only compresses the first pressure spring, the vane oil pump is in a low-pressure control mode, and in the process that the stator ring simultaneously compresses the first pressure spring and the second pressure spring, the vane oil pump is in a high-pressure control mode. Therefore, the vane type two-stage variable oil pump can meet the requirement of the two-stage variable of the oil pump, and is low in cost and reliable in operation.
Drawings
Fig. 1 is a schematic structural diagram of a vane type two-stage variable displacement oil pump according to the present invention.
FIG. 2 is a schematic diagram showing the oil pressure requirement of the engine and the flow curve of the conventional oil pump, and the flow curve of the vane type two-stage variable oil pump according to the present invention.
Description of the element reference numerals
1 pump seat
2 stator ring
3 rotor
4 pressure oil chamber
5 cambered surface groove
6 cambered surface bead
7 spring chamber
8 control oil cavity
9 first pressure spring
10 second pressure spring
11 connecting block
12 avoidance space
13 spring seat
14 connecting cavity
15 guide bar
16 first connector
17 second connector
18 sealing strip
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1, the invention provides a vane type two-stage variable oil pump, which comprises a pump seat 1, wherein a stator ring 2 is arranged in an inner cavity of the pump seat 1, a rotor 3 is accommodated in a pressure oil cavity 4 of the stator ring 2, a rotating shaft of the rotor 3 is fixedly connected with the pump seat 1, the pressure oil cavity 4 is connected with an oil suction port and a pressure oil port of the vane oil pump, and the pressure oil port is used for supplying oil to a lubricating oil system of an engine;
an arc-shaped groove 5 is formed in an inner cavity of the pump base 1, an arc-shaped rib 6 is arranged on the outer wall of the stator ring 2, the arc-shaped rib 6 is in running fit with the arc-shaped groove 5, a control oil cavity 8 and a spring cavity 7 are further formed in the pump base 1, the control oil cavity 8 is communicated with a lubricating oil system of an engine, a connecting block 11 extends out of the outer wall of the stator ring 2, the connecting block 11 is located between the control oil cavity 8 and the spring cavity 7, the connecting block 11 and the control oil cavity 8 are sealed through a sealing strip 18, a first pressure spring 9 and a second pressure spring 10 which are sleeved together are arranged in the spring cavity 7, one end of the first pressure spring 9 abuts against the connecting block 11, and the other end of the first pressure spring 9 abuts against the inner wall of the; the first pressure spring 9 is longer than the second pressure spring 10;
when the rotating speed of the variable displacement pump is increased, the oil pressure output by the oil pressure opening is increased, and the oil in the control oil cavity 8 pushes the connecting block 11 to overcome the pressure of the first pressure spring 9 so as to rotate the stator ring 2, so that the displacement per revolution of the variable displacement pump is reduced; when the pressure in the control oil chamber 8 exceeds a set value, the connecting block 11 compresses the first compression spring 9 and the second compression spring 10 simultaneously.
In the vane type two-stage variable oil pump, the control oil cavity 8 is communicated with a lubricating oil system of an engine; when the rotating speed of the vane oil pump is increased to increase the pressure of output oil liquid so as to increase the pressure in the control oil cavity 8, under the action of the oil pressure in the control oil cavity 8, the stator ring 2 rotates towards one side of the spring cavity 7 to compress the first pressure spring 9, so that the displacement per revolution of the variable displacement pump is reduced; when the pressure in the control oil chamber 8 exceeds a set value, the connecting block 11 compresses the first compression spring 9 and the second compression spring 10 simultaneously. In the process that the stator ring 2 only compresses the first compression spring 9, the vane oil pump is in a low-pressure control mode, and in the process that the stator ring 2 simultaneously compresses the first compression spring 9 and the second compression spring 10, the vane oil pump is in a high-pressure control mode. Therefore, the vane type two-stage variable oil pump can meet the requirement of the two-stage variable of the oil pump, and is low in cost and reliable in operation.
In the vane type two-stage variable oil pump, the axial position of a rotor 3 of the vane pump is kept fixed, pressure oil in a control oil cavity 8 and a spring in a spring cavity 7 can control the position of a stator ring 2, and when the stator ring 2 rotates towards the spring cavity 7, the displacement per rotation of the oil pump is reduced, and when the stator ring 2 rotates towards the control oil cavity 8, the displacement per rotation of the oil pump is increased. In the technical scheme of the invention, the rotating speed of the oil pump is increased along with the increase of the rotating speed of the engine, and when the rotating speed of the oil pump is increased to increase the pressure in the control oil cavity 8, the stator ring 2 rotates towards the spring cavity 7 again to reduce the displacement per revolution of the oil pump, so that the flow increasing speed of the oil pump is reduced.
In order to enable the rotor 3 of the oil pump to rotate smoothly in the pump base 1, as shown in fig. 1, an avoidance space 12 is provided in the inner cavity of the pump base 1, when the rotation speed of the variable displacement pump is increased, the oil pressure output by the oil pressure port is increased, and the oil in the control oil cavity 8 pushes the connecting block 11 to overcome the pressure of the first compression spring 9 to rotate the stator ring 2 towards the avoidance space 12. As shown in fig. 1, the escape space 12 is provided on the side close to the spring chamber 7.
As shown in fig. 1, a spring seat 13 is connected to an inner wall of the spring cavity 7, the spring seat 13 has a connection cavity 14, the second pressure spring 10 is sleeved outside a guide rod 15, a first connector 16 and a second connector 17 are respectively arranged at two ends of the guide rod 15, the first connector 16 is located in the connection cavity 14, one end of the second pressure spring 10 abuts against the second connector 17, and the other end of the second pressure spring 10 abuts against the spring seat 13; under the action of the second compression spring 10, the first connection head 16 is pressed against the inner wall of the connection chamber 14, so that the second compression spring 10 has a certain pre-tightening force. The first pressure spring 9 and the second pressure spring 10 are located between the spring seat 13 and the stator ring 2, and the first pressure spring 9 and the second pressure spring 10 are located in the spring cavity 7. In an initial state, the first compression spring 9 is in contact with the connecting block 11, and a certain gap is reserved between the second compression spring 10 and the connecting block 11. Therefore, when the stator ring 2 rotates toward the spring chamber 7 side, only the first compression spring 9 is compressed at the beginning, and after the first compression spring 9 is compressed to a certain length, the first compression spring 9 and the second compression spring 10 start to be compressed simultaneously. In a preferred embodiment, as shown in fig. 1, the first compression spring 9 is sleeved outside the second compression spring 10. In an initial state, a certain gap is formed between the second connector 17 and the stator ring 2, and in the process that the stator ring 2 moves towards the spring cavity 7, the stator ring 2 compresses the first compression spring 9 to a certain length and then contacts the second connector 17 to compress the second compression spring 10. In a preferred embodiment, as shown in fig. 1, the first connection head 16 has a gap with a sidewall of the connection chamber 14.
The vane type two-stage variable oil pump is arranged on an engine, and the control oil cavity 8 is connected with an oil way of an engine lubricating system, so that the displacement of the oil pump can be controlled in a closed loop mode through the oil pressure of the engine lubricating system, and the aim of controlling the output oil quantity of the oil pump is fulfilled. In a preferred embodiment, the oil suction opening 5 and the oil pressing opening 6 are provided in the pump mount 1.
When the vane type two-stage variable oil pump is installed on an engine to serve as an oil pump, the rotating speed of the oil pump is correspondingly increased along with the increase of the rotating speed of the engine when the engine runs, and meanwhile, the flow and the oil pressure are increased. When the force generated by the oil pressure of the engine acting in the control oil cavity 8 is larger than the spring force in the outer spring cavity 7, the oil pressure pushes the control ring to rotate, so that the displacement of the oil pump is reduced, and the oil pump enters a low-pressure variable mode. Along with the continuous rise of the rotating speed, the rotating amount of the stator ring 2 is increased, when the stator ring 2 contacts the guide rod 15, the stator ring 2 is simultaneously acted by the acting forces of the first pressure spring 9 and the second pressure spring 10, at the moment, the force generated by the oil pressure of the engine needs to be larger than the resultant force of the first pressure spring 9 and the second pressure spring 10 to enable the stator ring 2 to continuously rotate, and the oil pump enters a high-pressure variable mode.
Fig. 2 is a schematic diagram showing an oil pressure requirement of an engine, a flow curve of a conventional oil pump and a flow curve of a two-stage variable pump. The arc curve OS in the graph represents the relationship between the flow rate of the engine oil required by the lubrication system of the automobile engine and the engine speed; the broken line OG in the graph represents the relationship between the flow rate and the engine speed of the conventional constant-rate oil pump; the ODEFS in fig. 2 shows a relationship between a flow rate and an engine speed of the vane type two-stage variable displacement oil pump of the present invention, where a shows a flow rate saved by only the first compression spring 9 in the compression stage (low pressure mode), and B shows a flow rate saved by both the first compression spring 9 and the second compression spring 10 in the compression stage (high pressure mode).
Based on the technical scheme of the embodiment, the vane oil pump can meet the requirement of a secondary variable of the oil pump, saves the flow of the oil, reduces the energy consumption, and has a simple structure and low cost.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A vane type two-stage variable oil pump comprises a pump seat, wherein a stator ring is arranged in an inner cavity of the pump seat, a rotor is accommodated in a pressure oil cavity of the stator ring, a rotating shaft of the rotor is fixedly connected relative to the pump seat, the pressure oil cavity is connected with an oil suction port and a pressure oil port of the vane oil pump, and the pressure oil port is used for supplying oil to a lubricating oil system of an engine;
the pump seat is characterized in that a cambered surface connecting groove is formed in an inner cavity of the pump seat, a cambered surface convex edge is arranged on the outer wall of the stator ring and is in running fit with the cambered surface connecting groove, a control oil cavity and a spring cavity are further formed in the pump seat, the control oil cavity is communicated with a lubricating oil system of an engine, a connecting block extends out of the outer wall of the stator ring, the connecting block is located between the control oil cavity and the spring cavity, a first pressure spring and a second pressure spring which are sleeved together are arranged in the spring cavity, one end of the first pressure spring abuts against the connecting block, and the other end of the first pressure spring abuts against the inner wall of the spring cavity; the first pressure spring is longer than the second pressure spring;
when the rotating speed of the variable displacement pump is increased, the oil pressure output by the oil pressure opening is increased, and the oil in the control oil cavity pushes the connecting block to overcome the pressure of the first pressure spring to rotate the stator ring, so that the displacement per revolution of the variable displacement pump is reduced; when the pressure in the control oil cavity exceeds a set value, the connecting block compresses the first pressure spring and the second pressure spring simultaneously.
2. The vane-type two-stage variable oil pump according to claim 1, characterized in that: an avoidance space is arranged in an inner cavity of the pump base, when the rotating speed of the variable displacement pump is increased, the oil pressure output by the oil pressing port is increased, and the oil in the control oil cavity pushes the connecting block to overcome the pressure of the first pressure spring so as to enable the stator ring to rotate towards the avoidance space.
3. The vane-type two-stage variable oil pump according to claim 1, characterized in that: the first pressure spring is sleeved on the outer side of the second pressure spring.
4. The vane-type two-stage variable oil pump according to claim 1, characterized in that: the inner wall of the spring cavity is connected with a spring seat, the spring seat is provided with a connecting cavity, the second pressure spring is sleeved on the outer side of a guide rod, two ends of the guide rod are respectively provided with a first connector and a second connector, the first connector is positioned in the connecting cavity, one end of the second pressure spring abuts against the second connector, and the other end of the second pressure spring abuts against the spring seat; and under the action of the second pressure spring, the first connecting head is pressed on the inner wall of the connecting cavity.
5. The vane-type two-stage variable oil pump according to claim 4, characterized in that: in the process that the stator ring rotates towards the spring cavity, the stator ring compresses the first pressure spring to a certain length and then contacts the second connector to compress the second pressure spring.
6. The vane-type two-stage variable oil pump according to claim 4, characterized in that: a gap is formed between the first connecting head and the bottom of the connecting cavity.
7. The vane-type two-stage variable oil pump according to claim 1, characterized in that: the oil suction port and the oil pressing port are arranged on the pump seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352193.6A CN111076073A (en) | 2019-12-25 | 2019-12-25 | Vane type two-stage variable oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352193.6A CN111076073A (en) | 2019-12-25 | 2019-12-25 | Vane type two-stage variable oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111076073A true CN111076073A (en) | 2020-04-28 |
Family
ID=70317455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911352193.6A Pending CN111076073A (en) | 2019-12-25 | 2019-12-25 | Vane type two-stage variable oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111076073A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009092051A (en) * | 2007-10-12 | 2009-04-30 | Hitachi Ltd | Variable displacement pump |
| CN101443557A (en) * | 2006-03-27 | 2009-05-27 | 盖茨公司 | Variable displacement sliding vane pump |
| JP2012067761A (en) * | 2012-01-10 | 2012-04-05 | Hitachi Automotive Systems Ltd | Variable displacement pump |
| CN103742775A (en) * | 2013-12-30 | 2014-04-23 | 东风汽车公司 | Vane variable displacement oil pump |
| CN211649770U (en) * | 2019-12-25 | 2020-10-09 | 华域皮尔博格泵技术有限公司 | Vane type two-stage variable oil pump |
-
2019
- 2019-12-25 CN CN201911352193.6A patent/CN111076073A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101443557A (en) * | 2006-03-27 | 2009-05-27 | 盖茨公司 | Variable displacement sliding vane pump |
| JP2009092051A (en) * | 2007-10-12 | 2009-04-30 | Hitachi Ltd | Variable displacement pump |
| JP2012067761A (en) * | 2012-01-10 | 2012-04-05 | Hitachi Automotive Systems Ltd | Variable displacement pump |
| CN103742775A (en) * | 2013-12-30 | 2014-04-23 | 东风汽车公司 | Vane variable displacement oil pump |
| CN211649770U (en) * | 2019-12-25 | 2020-10-09 | 华域皮尔博格泵技术有限公司 | Vane type two-stage variable oil pump |
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