CN112228180B - Two-stage variable control system based on rotor pump - Google Patents
Two-stage variable control system based on rotor pump Download PDFInfo
- Publication number
- CN112228180B CN112228180B CN202011308530.4A CN202011308530A CN112228180B CN 112228180 B CN112228180 B CN 112228180B CN 202011308530 A CN202011308530 A CN 202011308530A CN 112228180 B CN112228180 B CN 112228180B
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- Prior art keywords
- cavity
- oil
- variable
- pressure
- spring
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 120
- 239000010705 motor oil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
- F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0238—Rotary pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0246—Adjustable pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention provides a rotor pump-based two-stage variable control system, which comprises a variable displacement rotor pump, an on-off electromagnetic valve and a pilot valve; the variable displacement rotor pump comprises a pump body, a variable ring and a variable spring, wherein the variable ring and the variable spring are positioned in a cavity of the pump body, a first feedback oil cavity and a second feedback oil cavity which are not communicated with each other are arranged between the variable ring and the side wall of the cavity of the pump body, and the second feedback oil cavity and the variable spring are positioned on the same side of the variable ring; the pilot valve comprises a valve sleeve, a valve core, a spring, a small control cavity, a large control cavity and a spring cavity, wherein an oil drain hole is formed in the valve sleeve, and when the valve core moves towards the spring cavity under the action of oil pressure, the large control cavity can be communicated with the oil drain hole; the second feedback oil cavity is respectively communicated with the small control cavity and the large control cavity through oil ways, and the switch electromagnetic valve is arranged on the oil way between the small control cavity and the second feedback oil cavity and can control the on-off of the oil way; the first feedback oil cavity and the second feedback oil cavity are communicated with the main oil duct or the pump outlet.
Description
Technical Field
The invention relates to an engine lubrication system, in particular to a rotor type oil pump with variable displacement.
Background
The rotor type oil pump mainly comprises an inner rotor, an outer rotor, an oil pump body, an oil pump cover and other parts. The driving inner rotor and the driven outer rotor are both arranged in a rotor cavity of the pump body. The inner rotor is fixed on the driving shaft, the outer rotor can rotate freely in the rotor cavity, a certain eccentric distance exists between the inner rotor and the outer rotor, and the inner rotor drives the outer rotor to rotate together in the same direction.
The inner rotor of general rotor type oil pump has 4 or more than 4 convex teeth, the concave tooth number of the outer rotor is one more than the convex number of the inner rotor, thus the inner rotor and the outer rotor can rotate in the same direction and out of synchronism, and the profile curve of the rotor is trochoid. The tooth profile of the rotor tooth profile is designed so that the tooth profile of each tooth of the inner rotor and the outer rotor always form point contact with each other when the rotor rotates to any angle. At least 4 working chambers are formed between the inner rotor and the outer rotor, and the volumes of the working chambers are continuously changed along with the rotation of the rotor. The inner and outer rotors are meshed, so that the volume is gradually increased, vacuum is generated, engine oil is sucked, the inner and outer rotors continue to rotate, and the engine oil is brought to one side of the oil outlet channel. Thus, with the continuous rotation of the inner and outer rotors, the engine oil is continuously sucked and pressed out.
The variable displacement rotor pump is more reliable and has stronger anti-interference performance compared with a variable displacement vane pump; compared with a gear variable displacement pump, the variable displacement pump has the advantages of flexible variable, lower power consumption torque, more sensitivity and no jamming.
Disclosure of Invention
The invention aims to provide a two-stage variable control system based on a rotor pump.
In order to solve the technical problems, the invention adopts the following technical scheme: a two-stage variable control system based on a rotor pump comprises a variable displacement rotor pump, an on-off electromagnetic valve and a pilot valve; the variable displacement rotor pump comprises a pump body, a variable ring, a variable spring, an outer rotor and an inner rotor, wherein the variable ring and the variable spring are positioned in a cavity of the pump body, the variable ring is provided with a rotor cavity and an outwards protruding spring pressing block, one side of the spring pressing block is in contact fit with the variable spring, a first feedback oil cavity and a second feedback oil cavity which are not communicated with each other are arranged between the variable ring and the side wall of the cavity of the pump body, and the second feedback oil cavity and the variable spring are both positioned on the same side of the variable ring; the pilot valve comprises a valve sleeve, a valve core, a spring, a small control cavity, a large control cavity and a spring cavity, wherein an oil drain hole is formed in the valve sleeve, and when the valve core moves towards the spring cavity under the action of oil pressure, the large control cavity can be communicated with the oil drain hole; the second feedback oil cavity is respectively communicated with the small control cavity and the large control cavity through oil passages, and the switch electromagnetic valve is arranged on the oil passage between the small control cavity and the second feedback oil cavity and can control the on-off of the oil passage; the first feedback oil cavity and the second feedback oil cavity are respectively communicated with the main oil duct or the pump outlet through oil ways; after the second feedback oil cavity is depressurized through the oil drain hole of the pilot valve, the oil pressure in the first feedback oil cavity is larger than the sum of the oil pressure in the second feedback oil cavity and the pretightening force of the variable spring, and under the action of the oil pressure in the first feedback oil cavity, the variable ring can deflect or rotate in the cavity of the pump body, so that the effective area of the oil inlet end is reduced, and the effective displacement is reduced.
The working state of the control system is as follows: in the low-pressure mode, the switch electromagnetic valve is electrified, the P port is communicated with the A port, the pressure oil in the second feedback oil cavity enters the small control cavity of the pilot valve through the switch electromagnetic valve, the large control cavity is also filled with the pressure oil from the second feedback oil cavity, and the pressure oil in the small control cavity and the pressure oil in the large control cavity act on the valve core together; when the sum of the oil pressure of the small control cavity and the oil pressure of the large control cavity is larger than the pretightening force of the pilot valve spring, the valve core moves to the spring cavity to enable the large control cavity to be communicated with the oil drain hole, the pressure oil in the second feedback oil cavity is released through the oil drain hole of the pilot valve, and at the moment, the oil pressure of the first feedback oil cavity can overcome the pretightening force of the variable spring and the oil pressure of the second feedback oil cavity to push the variable ring to deflect or rotate in the pump body cavity;
In the high-pressure mode, the switching electromagnetic valve is powered off, the port P is not communicated with the port A, the port A is communicated with the port T, the pressure oil in the second feedback oil cavity cannot enter the small control cavity of the pilot valve through the switching electromagnetic valve, only the large control cavity is filled with the pressure oil from the second feedback oil cavity, and the pressure oil in the large control cavity independently acts on the valve core; when the oil pressure of the large control cavity is larger than the pretightening force of the pilot valve spring, the valve core moves to the spring cavity, so that the large control cavity is communicated with the oil drain hole, the pressure oil in the second feedback oil cavity is released through the oil drain hole of the pilot valve, and at the moment, the oil pressure of the first feedback oil cavity can overcome the pretightening force of the variable spring and the oil pressure of the second feedback oil cavity, and the variable ring is pushed to deflect or rotate in the pump body cavity.
The beneficial effects of the invention are as follows: the control system provided by the invention comprises a variable displacement rotor pump, an on-off electromagnetic valve and a pilot valve, wherein the variable displacement rotor pump is provided with two feedback oil cavities, and the displacement of the rotor pump can be changed by releasing pressure oil in one feedback oil cavity; because the pilot valve is provided with two control cavities, the two-level displacement of the variable displacement rotor pump can be realized through the cooperation of the switch electromagnetic valve. The whole control system is ingenious in matching and sensitive in feedback, so that the variable displacement rotor pump can timely change along with the change of oil pressure.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a control system according to an embodiment of the present invention;
The reference numerals are:
10-variable displacement rotor pump 11-variable ring
12-First feedback oil chamber 13-second feedback oil chamber
20-Switch solenoid valve 30-pilot valve
31-Small control Chamber 32-big control Chamber
33-Oil drain hole.
Detailed Description
The invention will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. In the description of the present invention, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other between two elements, may be directly connected, or may be indirectly connected through an intermediate medium, and the specific meaning of the terms may be understood by those skilled in the art according to circumstances.
As shown in fig. 1, the preferred embodiment of the present invention is: a rotor pump-based two-stage variable control system comprises a variable displacement rotor pump 10, an on-off electromagnetic valve 20 and a pilot valve 30; the variable displacement rotor pump comprises a pump body, a variable ring 11, a variable spring, an outer rotor and an inner rotor, wherein the variable ring 11 and the variable spring are positioned in a cavity of the pump body, the variable ring is provided with a rotor cavity and an outwards protruding spring pressing block, one side of the spring pressing block is in contact fit with the variable spring, a first feedback oil cavity 12 and a second feedback oil cavity 13 which are not communicated with each other are arranged between the variable ring 11 and the side wall of the cavity of the pump body, and the second feedback oil cavity 13 and the variable spring are both positioned on the same side of the variable ring 11; the pilot valve 30 comprises a valve sleeve, a valve core, a spring, a small control cavity 31, a large control cavity 32 and a spring cavity, wherein an oil drain hole 33 is formed in the valve sleeve, and when the valve core moves towards the spring cavity under the action of oil pressure, the large control cavity 32 can be communicated with the oil drain hole 33; the second feedback oil cavity 13 is respectively communicated with the small control cavity 31 and the large control cavity 32 through oil paths, and the switch electromagnetic valve 20 is arranged on the oil path between the small control cavity 31 and the second feedback oil cavity 13 and can control the on-off of the oil path; the first feedback oil cavity 12 and the second feedback oil cavity 13 are respectively communicated with the main oil duct or the pump outlet through oil ways; after the second feedback oil cavity 13 is depressurized through the oil drain hole 33 of the pilot valve, the oil pressure in the first feedback oil cavity 12 is larger than the sum of the oil pressure in the second feedback oil cavity 13 and the pretightening force of the variable spring, and under the action of the oil pressure in the first feedback oil cavity 12, the variable ring 11 can deflect or rotate in the cavity of the pump body, so that the effective area of the oil inlet end is reduced, and the effective displacement is reduced.
The working state of the control system is as follows: in the low-pressure mode, the switch electromagnetic valve 20 is electrified, the port P is communicated with the port A, the pressure oil in the second feedback oil cavity 13 enters the small control cavity 31 of the pilot valve through the switch electromagnetic valve 20, the large control cavity 32 is also filled with the pressure oil from the second feedback oil cavity 13, and the pressure oil in the small control cavity 31 and the pressure oil in the large control cavity 32 act on the valve core together; when the sum of the oil pressures of the small control cavity 31 and the large control cavity 32 is larger than the pretightening force of the pilot valve spring, the valve core moves to the spring cavity, so that the large control cavity 32 is communicated with the oil drain hole 33, the pressure oil in the second feedback oil cavity 13 is released through the oil drain hole 33 of the pilot valve, and at the moment, the oil pressure of the first feedback oil cavity 12 can overcome the pretightening force of the variable spring and the oil pressure of the second feedback oil cavity 13 to push the variable ring 11 to deflect or rotate in the pump cavity;
In the high-pressure mode, the switching electromagnetic valve 20 is powered off, the port P is not communicated with the port A, the port A is communicated with the port T, the pressure oil in the second feedback oil cavity 13 cannot enter the small control cavity 31 of the pilot valve through the switching electromagnetic valve 20, only the large control cavity 32 is filled with the pressure oil from the second feedback oil cavity 13, and the pressure oil in the large control cavity 32 independently acts on the valve core; when the oil pressure of the large control cavity 32 is larger than the pretightening force of the pilot valve spring, the valve core moves to the spring cavity, so that the large control cavity 32 is communicated with the oil drain hole 33, the pressure oil in the second feedback oil cavity 13 is decompressed through the oil drain hole 33 of the pilot valve, and at the moment, the oil pressure of the first feedback oil cavity 12 can overcome the pretightening force of the variable spring and the oil pressure of the second feedback oil cavity 13, and the variable ring 11 is pushed to deflect or rotate in the pump cavity.
The foregoing embodiments are preferred embodiments of the present invention, and in addition, the present invention may be implemented in other ways, and any obvious substitution is within the scope of the present invention without departing from the concept of the present invention.
In order to facilitate understanding of the improvements of the present application over the prior art, some of the figures and descriptions of the present application have been simplified and some other elements have been omitted for clarity, as will be appreciated by those of ordinary skill in the art.
Claims (1)
1. A control method of a two-stage variable control system based on a rotor pump is characterized by comprising the following steps of: comprises a variable displacement rotor pump (10), an on-off electromagnetic valve (20) and a pilot valve (30); the variable displacement rotor pump comprises a pump body, a variable ring (11), a variable spring, an outer rotor and an inner rotor, wherein the variable ring (11) and the variable spring are positioned in a cavity of the pump body, the variable ring (11) is provided with a rotor cavity and an outwards protruding spring pressing block, one side of the spring pressing block is in contact fit with the variable spring, a first feedback oil cavity (12) and a second feedback oil cavity (13) which are not communicated with each other are arranged between the variable ring (11) and the side wall of the cavity of the pump body, and the second feedback oil cavity (13) and the variable spring are both positioned on the same side of the variable ring (11); the pilot valve (30) comprises a valve sleeve, a valve core, a spring, a small control cavity (31), a large control cavity (32) and a spring cavity, wherein an oil drain hole (33) is formed in the valve sleeve, and when the valve core moves towards the spring cavity under the action of oil pressure, the large control cavity (32) can be communicated with the oil drain hole (33); the second feedback oil cavity (13) is respectively communicated with the small control cavity (31) and the large control cavity (32) through oil ways, and the switch electromagnetic valve (20) is arranged on the oil way between the small control cavity (31) and the second feedback oil cavity (13) and can control the on-off of the oil way; the first feedback oil cavity (12) and the second feedback oil cavity (13) are respectively communicated with the main oil duct or the pump outlet through oil ways; after the second feedback oil cavity (13) is depressurized through the oil drain hole (33) of the pilot valve, the oil pressure in the first feedback oil cavity (12) is larger than the sum of the oil pressure in the second feedback oil cavity (13) and the pretightening force of the variable spring, and under the action of the oil pressure in the first feedback oil cavity (12), the variable ring (11) can deflect or rotate in the pump cavity, so that the effective area of the oil inlet end is reduced, and the effective displacement is reduced;
In the low-pressure mode, the switch electromagnetic valve (20) is electrified, the P port is communicated with the A port, pressure oil in the second feedback oil cavity (13) enters the small control cavity (31) of the pilot valve through the switch electromagnetic valve (20), the large control cavity (32) is also filled with the pressure oil from the second feedback oil cavity (13), and the pressure oil in the small control cavity (31) and the pressure oil in the large control cavity (32) jointly act on the valve core; when the sum of oil pressure of the small control cavity (31) and oil pressure of the large control cavity (32) is larger than the pretightening force of the pilot valve spring, the valve core moves towards the spring cavity, so that the large control cavity (32) is communicated with the oil drain hole (33), pressure oil in the second feedback oil cavity (13) is discharged through the oil drain hole of the pilot valve (30), and at the moment, the oil pressure of the first feedback oil cavity (12) can overcome the pretightening force of the variable spring and the oil pressure of the second feedback oil cavity (13) to push the variable ring (11) to deflect or rotate in the pump cavity;
In the high-pressure mode, the switching electromagnetic valve (20) is powered off, the port P is not communicated with the port A, the port A is communicated with the port T, the pressure oil in the second feedback oil cavity (13) cannot enter the small control cavity (31) of the pilot valve through the switching electromagnetic valve (20), only the large control cavity (32) is filled with the pressure oil from the second feedback oil cavity (13), and the pressure oil in the large control cavity (32) independently acts on the valve core; when the oil pressure of the large control cavity (32) is larger than the pretightening force of the pilot valve spring, the valve core moves towards the spring cavity, so that the large control cavity (32) is communicated with the oil drain hole (33), pressure oil in the second feedback oil cavity (13) is released through the oil drain hole (33) of the pilot valve, and at the moment, the oil pressure of the first feedback oil cavity (12) can overcome the pretightening force of the variable spring and the oil pressure of the second feedback oil cavity (13) to push the variable ring (11) to deflect or rotate in the pump cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308530.4A CN112228180B (en) | 2020-11-20 | 2020-11-20 | Two-stage variable control system based on rotor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308530.4A CN112228180B (en) | 2020-11-20 | 2020-11-20 | Two-stage variable control system based on rotor pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112228180A CN112228180A (en) | 2021-01-15 |
| CN112228180B true CN112228180B (en) | 2024-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011308530.4A Active CN112228180B (en) | 2020-11-20 | 2020-11-20 | Two-stage variable control system based on rotor pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN112228180B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370594A (en) * | 2021-12-29 | 2022-04-19 | 四川航天世源科技有限公司 | Variable displacement oil pump with supercharging variable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003201976A (en) * | 2001-07-11 | 2003-07-18 | Borgwarner Inc | Variable-displacement vane pump with variable target adjuster |
| CN104912619A (en) * | 2015-06-15 | 2015-09-16 | 湖南机油泵股份有限公司 | System for controlling oil drainage type single-cavity two-stage variable displacement blade pump |
| CN105114146A (en) * | 2015-09-28 | 2015-12-02 | 湖南机油泵股份有限公司 | Control system of main oil duct feedback single-cavity two-stage variable-displacement vane pump |
| WO2019080570A1 (en) * | 2017-10-27 | 2019-05-02 | 湖南机油泵股份有限公司 | Dual switch electromagnetic valve-based level 3 or level 4 variable displacement oil pump |
| CN213598030U (en) * | 2020-11-20 | 2021-07-02 | 湖南机油泵股份有限公司 | Two-stage variable control system based on rotor pump |
-
2020
- 2020-11-20 CN CN202011308530.4A patent/CN112228180B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003201976A (en) * | 2001-07-11 | 2003-07-18 | Borgwarner Inc | Variable-displacement vane pump with variable target adjuster |
| CN104912619A (en) * | 2015-06-15 | 2015-09-16 | 湖南机油泵股份有限公司 | System for controlling oil drainage type single-cavity two-stage variable displacement blade pump |
| CN105114146A (en) * | 2015-09-28 | 2015-12-02 | 湖南机油泵股份有限公司 | Control system of main oil duct feedback single-cavity two-stage variable-displacement vane pump |
| WO2019080570A1 (en) * | 2017-10-27 | 2019-05-02 | 湖南机油泵股份有限公司 | Dual switch electromagnetic valve-based level 3 or level 4 variable displacement oil pump |
| CN213598030U (en) * | 2020-11-20 | 2021-07-02 | 湖南机油泵股份有限公司 | Two-stage variable control system based on rotor pump |
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| Publication number | Publication date |
|---|---|
| CN112228180A (en) | 2021-01-15 |
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Address after: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee after: Hunan Meihu Intelligent Manufacturing Co.,Ltd. Country or region after: China Address before: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee before: Hunan Oil Pump Co.,Ltd. Country or region before: China |