CN110469500B - Constant pressure variable pump - Google Patents
Constant pressure variable pump Download PDFInfo
- Publication number
- CN110469500B CN110469500B CN201910819490.0A CN201910819490A CN110469500B CN 110469500 B CN110469500 B CN 110469500B CN 201910819490 A CN201910819490 A CN 201910819490A CN 110469500 B CN110469500 B CN 110469500B
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- oil
- port
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- groove
- variable
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- 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
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- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention relates to a constant-pressure variable pump, which comprises a pump shell, wherein an oil suction port, an oil outlet and a mounting cavity are arranged in the pump shell; the left end cover and the right end cover are fixedly arranged at two ends of the pump shell; the driving shaft is rotatably connected in the pump shell; the inner rotor and the outer rotor are arranged in the mounting cavity; a valve plate; and a variable control component. The constant-pressure variable pump is simple in structure, compact in size and low in cost, and can automatically change the pressure of an oil outlet to complete the function of the conventional constant-pressure variable.
Description
Technical Field
The invention belongs to the technical field of oil pumps, and particularly relates to a constant-pressure variable pump.
Background
The hydraulic transmission system has many advantages and is more and more widely applied, wherein the constant pressure variable pump is a hydraulic component with larger usage amount. The constant pressure variable pump is characterized in that a variable cylinder of a plunger pump is controlled by a constant pressure valve, so that the variable cylinder changes the inclination angle of a swash plate to realize the variable of the pump, when the outlet pressure of the pump does not reach the set pressure of the constant pressure valve, the constant pressure variable pump outputs the flow with the maximum discharge capacity, and when the outlet pressure of the pump reaches the set pressure of the constant pressure valve, the output flow can automatically reach zero. In a hydraulic system adopting a reversing valve with a closed middle position, if a fixed displacement pump is adopted, an unloading valve is not configured, the no-load power loss is large, and if a constant-pressure variable displacement pump is adopted, the pump is in a pressure maintaining state, the pressure drop of the valve and a pipeline is avoided, and the power loss of the constant-pressure system is small. Similarly, in the electro-hydraulic servo system, a constant-pressure energy source is often needed, and a constant-pressure variable pump is most suitable as the constant-pressure energy source, because the power loss of the system can be reduced to the minimum. In some systems requiring large flows or those requiring large flows instantaneously, accumulator drive systems are often employed in order to reduce the installed capacity of the system. In the prior accumulator transmission system, a constant displacement pump system combining a plurality of pumps is usually adopted, when the system reaches the highest pressure of the accumulator, a method of stopping the pumps or stopping part of the pumps is adopted, otherwise, the system generates great power loss, and a constant pressure pump system is adopted, so that the hydraulic and electric systems of the equipment are greatly simplified. However, the constant-pressure variable pump in the prior art is generally in the form of a plunger pump, and is provided with a constant-pressure valve, a swash plate, a plunger, a ball head, a swash plate return spring and the like, so that the constant-pressure variable pump is complex in structure, high in machining precision requirement, complex in assembly and high in overall cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a constant-pressure variable pump in the form of an internal gear pump, which has the advantages of simple structure, convenience in processing, simplicity in assembly and low cost.
The technical scheme adopted by the invention for solving the technical problems is as follows: a constant pressure variable pump, characterized in that: the oil-saving pump comprises a pump shell, wherein an installation cavity with an opening at the left end is axially arranged in the pump shell, an oil suction port and an oil outlet are arranged in the pump shell, and an oil suction channel for communicating the oil suction port with the installation cavity and an oil discharge channel for communicating the oil outlet with the installation cavity are arranged in the pump shell;
the left end cover is fixedly connected to the left end of the pump shell and used for plugging a left opening of the mounting cavity;
the right end cover is fixedly connected to the right end of the pump shell;
the drive shaft is rotatably connected in the pump shell, and the right end of the drive shaft extends out of the right end cover;
the inner rotor and the outer rotor are rotatably arranged in the mounting cavity, the inner rotor is fixedly connected to the driving shaft and is provided with a plurality of outer teeth, the outer rotor and the inner rotor are eccentrically arranged, a plurality of inner teeth meshed with the outer teeth of the inner rotor are arranged in the outer rotor, and an oil suction area and an oil discharge area are formed between the outer teeth of the inner rotor and the inner teeth of the outer rotor;
the flow distribution plate is fixedly arranged in the mounting cavity and is provided with a second flow distribution groove communicated with the oil absorption area and a first flow distribution groove communicated with the oil discharge area;
the variable control assembly is arranged in the pump shell, and when the pressure of the oil outlet is smaller than a preset value, the variable control assembly controls the second distributing groove to be communicated with the oil absorption channel and controls the first distributing groove to be communicated with the oil discharge channel; when the pressure of the oil outlet is larger than a preset value, the variable control assembly controls the first flow distribution groove and the second flow distribution groove to be communicated with the oil absorption channel.
Preferably, the variable control component comprises a variable control disc, a variable valve core and a spring, a valve hole with an opening at the upper end is arranged in the pump shell, and the variable valve core is connected in the valve hole in a sliding manner; a plug is arranged at an opening at the upper end of the valve hole; the spring is positioned in the valve hole and used for forcing the variable valve core to move towards the plug direction; a hydraulic control cavity is formed between the upper end of the variable valve core and the plug, a pressure oil port, an oil return port, a first oil port and a second oil port are formed between the variable valve core and the valve hole, the hydraulic control cavity and the pressure oil port are communicated with the oil outlet, and the oil return port is communicated with the oil suction port;
the bottom of the installation cavity is provided with a circular groove, the variable control panel is rotatably connected in the circular groove, an arc-shaped groove is arranged in the circular groove around the center of the circular groove, and the variable control panel is provided with a convex plate extending into the arc-shaped groove; a first control cavity is formed between the convex plate and one end of the arc-shaped groove, a second control cavity is formed between the convex plate and the other end of the arc-shaped groove, the first oil port is communicated with the first control cavity, and the second oil port is communicated with the second control cavity; when the variable valve core is close to the plug, the pressure oil port is communicated with the first oil port, and the oil return port is communicated with the second oil port; when the variable valve core is far away from the plug, the pressure oil port is communicated with the second oil port, and the first oil port is communicated with the oil return port;
the variable control panel is provided with a first flow distribution port and a second flow distribution port which are symmetrical to each other; when the convex plate is positioned at the upper end of the arc-shaped groove, the second flow distribution groove is communicated with the oil absorption channel through the second flow distribution port, and the first flow distribution groove is communicated with the oil discharge channel through the first flow distribution port; when the convex plate is positioned at the lower end of the arc-shaped groove, the first distributing groove, the second distributing groove and the oil absorption channel are communicated through the first distributing groove and the second distributing groove.
Preferably, the side wall of the installation cavity is provided with a positioning groove, and the valve plate is provided with a positioning block matched with the positioning groove.
Preferably, the first distributing groove and the second distributing groove are symmetrically arranged on the distributing plate and are crescent-shaped.
Compared with the prior art, the invention has the advantages that: according to the invention, by arranging the variable control assembly, when the pressure of the oil outlet does not reach a set value, the internal gear pump consisting of the inner rotor and the outer rotor can be output at the maximum displacement; when the pressure of the oil outlet reaches the preset pressure, the oil discharge area is communicated with the oil suction channel through the variable control assembly, so that the internal gear pump is unloaded, and the variable of the internal gear pump is automatically completed. The invention has simple structure, compact volume and low manufacturing cost, realizes constant pressure variable control in the form of an internal gear pump, and can replace a constant pressure variable plunger pump in a large range.
Drawings
FIG. 1 is a schematic three-dimensional structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a three-dimensional explosive structure according to an embodiment of the present invention;
FIG. 3 is a front view of an embodiment of the present invention;
FIG. 4 is a top view of an embodiment of the present invention;
FIG. 5 is a sectional view taken along line A-A of FIG. 3;
FIG. 6 is a schematic view of the cross-sectional structure F-F in FIG. 3;
FIG. 7 is a schematic view of the structure B-B in FIG. 3;
FIG. 8 is a schematic three-dimensional view of a pump casing according to an embodiment of the present invention;
FIG. 9 is a schematic three-dimensional structure of a port plate according to an embodiment of the present invention;
FIG. 10 is a schematic view of the structure C-C of FIG. 4;
FIG. 11 is a schematic three-dimensional structure diagram of a variable control panel according to an embodiment of the present invention;
FIG. 12 is a diagram illustrating the operation of the variable control panel when the variable control panel is not changed according to an embodiment of the present invention;
FIG. 13 is a diagram illustrating the operation of the variable control panel during variable operation according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1-13, is a preferred embodiment of the present invention.
A constant pressure variable pump comprises
The oil suction type oil pump comprises a pump shell 1, wherein an installation cavity 1a with an opening at the left end is axially arranged in the pump shell 1, an oil suction port 101 and an oil outlet 102 are arranged in the pump shell 1, an oil suction channel 103 used for communicating the oil suction port 101 with the installation cavity 1a and an oil discharge channel 104 used for communicating the oil outlet 102 with the installation cavity 1a are arranged in the pump shell 1.
And the left end cover 2 are fixedly connected to the left end of the pump shell 1 and used for plugging a left opening of the installation cavity 1 a.
Right-hand member lid 3, right-hand member lid 3 fixed connection is at the right-hand member of pump case 1.
And the driving shaft 4 is rotatably connected in the pump shell 1, and the right end of the driving shaft 4 extends out of the right end cover 3.
The flow distribution plate 7 is fixedly arranged in the mounting cavity 1a, a second flow distribution groove 72 communicated with the oil absorption area and a first flow distribution groove 71 communicated with the oil discharge area are arranged on the flow distribution plate 7, and the first flow distribution groove 71 and the second flow distribution groove 72 are symmetrically arranged on the flow distribution plate 7 and are crescent-shaped. A positioning groove 108 is arranged on the side wall of the installation cavity 1a, and a positioning block 73 matched with the positioning groove 108 is arranged on the valve plate 7.
The variable control assembly is arranged in the pump shell 1, and when the pressure of the oil outlet 102 is smaller than a preset value, the variable control assembly controls the second distributing groove 72 to be communicated with the oil suction channel 103 and controls the first distributing groove 71 to be communicated with the oil discharge channel 104; when the pressure of the oil outlet 102 is larger than the preset value, the variable control assembly controls the first distributing groove 71 and the second distributing groove 72 to be communicated with the oil suction passage 103. The variable control assembly comprises a variable control disc 8, a variable valve core 9b and a spring 9c, a valve hole with an opening at the upper end is formed in the pump shell 1, and the variable valve core 9b is connected in the valve hole in a sliding mode; a plug 9a is arranged at an opening at the upper end of the valve hole; the spring 9c is positioned in the valve hole and used for forcing the variable valve core 9b to move towards the plug 9 a; a hydraulic control cavity 9a1 is formed between the upper end of the variable valve core 9B and the plug 9a, a pressure oil port P, an oil return port T, a first oil port a and a second oil port B are formed between the variable valve core 9B and the valve hole, the hydraulic control cavity 9a1 and the pressure oil port P are communicated with the oil outlet 102, and the oil return port T is communicated with the oil suction port 101. The bottom of the installation cavity 1a is provided with a circular groove, the variable control disc 8 is rotatably connected in the circular groove, an arc-shaped groove 107 is arranged in the circular groove around the center of the circular groove, and a convex plate 81 extending into the arc-shaped groove 107 is arranged on the variable control disc 8; a first control cavity 8a is formed between the convex plate 81 and one end of the arc-shaped groove 107, a second control cavity 8B is formed between the convex plate 81 and the other end of the arc-shaped groove 107, the first oil port A is communicated with the first control cavity 8a, and the second oil port B is communicated with the second control cavity 8B; when the variable valve core 9B is close to the plug 9a, the pressure oil port P is communicated with the first oil port A, and the oil return port T is communicated with the second oil port B; when the variable valve core 9B is far away from the plug 9a, the pressure oil port P is communicated with the second oil port B, and the first oil port A is communicated with the oil return port T; the variable control panel 8 is provided with a first flow distribution port 801 and a second flow distribution port 802 which are symmetrical to each other; when the convex plate 81 is positioned at the upper end of the arc-shaped groove 107, the second distribution groove 72 is communicated with the oil suction passage 103 through the second distribution port 802, and the first distribution groove 71 is communicated with the oil discharge passage 104 through the first distribution port 801; when the convex plate 81 is located at the lower end of the arc-shaped groove 107, the first distribution groove 801 and the second distribution groove 802 are communicated with the first distribution groove 71, the second distribution groove 72 and the oil suction passage 103.
When the constant-pressure variable pump works, the driving shaft 4 needs to be connected with the motor, the motor is electrified to drive the rotating speed of the driving shaft 4, the driving shaft 4 drives the inner rotor 6 to rotate, and the inner rotor 6 drives the outer rotor 5 to rotate due to the meshing relation of the inner rotor 6 and the outer rotor 5. When the pressure in the oil outlet 102 is low and does not exceed the set pressure of the spring 9c, the variable valve core 9B is close to the plug 9a under the action of the spring 9c, the pressure oil port P is communicated with the first oil port a, the oil return port T is communicated with the second oil port B, the oil in the first oil port a enters the first control cavity 8a to push the relief plate 81 to rotate to the upper end of the arc-shaped groove 107 rightwards, the oil in the second control cavity 8B flows into the oil suction port 101 through the second oil port B and the oil return port T, the second distributing groove 72 is communicated with the oil suction channel 103 through the second distributing port 802, and the first distributing groove 71 is communicated with the oil discharge channel 104 through the first distributing port 801. The hydraulic oil enters the oil suction area through the oil suction port 101, the oil suction passage 103 and the second flow distribution groove 72, and then enters the oil outlet 102 through the oil discharge area, the first flow distribution groove 71 and the oil discharge passage 104. At this time, the constant pressure variable pump of the present invention outputs a maximum flow rate.
When the pressure in the oil outlet 102 rises to exceed the set pressure of the spring 9c, the variable valve core 9B moves downwards under the acting force of the oil outlet 102 to be far away from the plug 9a, the pressure oil port P is communicated with the second oil port B, the first oil port a is communicated with the oil return port T, oil in the second oil port B enters the second control cavity 8B to push the relief plate 81 to rotate leftwards to the lower end of the arc-shaped groove 107, the first flow distribution port 801 and the second flow distribution port 802 are communicated with the first flow distribution groove 71, the second flow distribution groove 72 and the oil suction channel 103, so that the oil discharge area is also communicated with the oil suction channel 103 through the variable control disc 8, namely, the internal gear pump unloading does not output flow to the oil outlet 102 any more, and energy conservation is realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A constant pressure variable pump, characterized in that: comprises that
The oil pump comprises a pump shell (1), wherein an installation cavity (1a) with an opening at the left end is axially arranged in the pump shell (1), an oil suction port (101) and an oil outlet (102) are arranged in the pump shell (1), and an oil suction channel (103) used for communicating the oil suction port (101) with the installation cavity (1a) and an oil discharge channel (104) used for communicating the oil outlet (102) with the installation cavity (1a) are arranged in the pump shell (1);
the left end cover (2) is fixedly connected to the left end of the pump shell (1) and used for plugging a left opening of the mounting cavity (1 a);
the right end cover (3), the right end cover (3) is fixedly connected to the right end of the pump shell (1);
the drive shaft (4), the drive shaft (4) is connected in the pump case (1) rotatably, the right end of the drive shaft (4) stretches out of the right end cover (3);
the oil-sucking and oil-discharging device comprises an inner rotor (6) and an outer rotor (5), wherein the inner rotor (6) and the outer rotor (5) are rotatably arranged in a mounting cavity (1a), the inner rotor (6) is fixedly connected to a driving shaft (4) and is provided with a plurality of outer teeth, the outer rotor (5) and the inner rotor (6) are eccentrically arranged, a plurality of inner teeth meshed with the outer teeth of the inner rotor (6) are arranged in the outer rotor (5), and an oil-sucking area and an oil-discharging area are formed between the outer teeth of the inner rotor (6) and the inner teeth of the outer rotor (5;
the flow distribution plate (7), the flow distribution plate (7) is fixedly arranged in the mounting cavity (1a), and a second flow distribution groove (72) communicated with the oil absorption area and a first flow distribution groove (71) communicated with the oil discharge area are arranged on the flow distribution plate (7);
the variable control assembly is arranged in the pump shell (1), and when the pressure of the oil outlet (102) is smaller than a preset value, the variable control assembly controls the second distributing groove (72) to be communicated with the oil suction channel (103) and controls the first distributing groove (71) to be communicated with the oil discharge channel (104); when the pressure of the oil outlet (102) is larger than a preset value, the variable control assembly controls the first distributing groove (71) and the second distributing groove (72) to be communicated with the oil suction channel (103);
the variable control assembly comprises a variable control disc (8), a variable valve core (9b) and a spring (9c), a valve hole with an opening at the upper end is formed in the pump shell (1), and the variable valve core (9b) is connected in the valve hole in a sliding mode; a plug (9a) is arranged at an opening at the upper end of the valve hole; the spring (9c) is positioned in the valve hole and used for forcing the variable valve core (9b) to move towards the direction of the plug (9 a); a hydraulic control cavity (9a1) is formed between the upper end of the variable valve core (9B) and the plug (9a), a pressure oil port (P), an oil return port (T), a first oil port (A) and a second oil port (B) are formed between the variable valve core (9B) and the valve hole, the hydraulic control cavity (9a1) and the pressure oil port (P) are communicated with the oil outlet (102), and the oil return port (T) is communicated with the oil suction port (101);
a circular groove is formed in the bottom of the mounting cavity (1a), the variable control disc (8) is rotatably connected into the circular groove, an arc-shaped groove (107) is formed in the circular groove around the circle center of the circular groove, and a convex plate (81) extending into the arc-shaped groove (107) is arranged on the variable control disc (8); a first control cavity (8a) is formed between the convex plate (81) and one end of the arc-shaped groove (107), a second control cavity (8B) is formed between the convex plate (81) and the other end of the arc-shaped groove (107), the first oil port (A) is communicated with the first control cavity (8a), and the second oil port (B) is communicated with the second control cavity (8B); when the variable valve core (9B) is close to the plug (9a), the pressure oil port (P) is communicated with the first oil port (A), and the oil return port (T) is communicated with the second oil port (B); when the variable valve core (9B) is far away from the plug (9a), the pressure oil port (P) is communicated with the second oil port (B), and the first oil port (A) is communicated with the oil return port (T); a first flow distribution port (801) and a second flow distribution port (802) which are symmetrical to each other are arranged on the variable control panel (8); when the convex plate (81) is positioned at the upper end of the arc-shaped groove (107), the second distribution groove (72) is communicated with the oil suction channel (103) through the second distribution port (802), and the first distribution groove (71) is communicated with the oil discharge channel (104) through the first distribution port (801); when the convex plate (81) is positioned at the lower end of the arc-shaped groove (107), the first distributing opening (801) and the second distributing opening (802) are communicated with the first distributing opening (71), the second distributing opening (72) and the oil suction channel (103).
2. The constant pressure variable pump as claimed in claim 1, wherein: the side wall of the installation cavity (1a) is provided with a positioning groove (108), and the valve plate (7) is provided with a positioning block (73) matched with the positioning groove (108).
3. The constant pressure variable pump as claimed in claim 1, wherein: the first distributing groove (71) and the second distributing groove (72) are symmetrically arranged on the distributing plate (7) and are crescent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819490.0A CN110469500B (en) | 2019-08-31 | 2019-08-31 | Constant pressure variable pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819490.0A CN110469500B (en) | 2019-08-31 | 2019-08-31 | Constant pressure variable pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110469500A CN110469500A (en) | 2019-11-19 |
| CN110469500B true CN110469500B (en) | 2021-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910819490.0A Active CN110469500B (en) | 2019-08-31 | 2019-08-31 | Constant pressure variable pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110469500B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63176683A (en) * | 1987-01-17 | 1988-07-20 | Mitsubishi Motors Corp | Trochoid type pump |
| JPH02153281A (en) * | 1988-12-06 | 1990-06-12 | Yamada Seisakusho:Kk | Trochoid type oil pump |
| CN1711422A (en) * | 2002-12-19 | 2005-12-21 | 乔马-流体机械有限公司 | Variable volume flow rotor pump |
| DE102006025367A1 (en) * | 2006-06-01 | 2007-12-06 | Bayerische Motoren Werke Ag | Gear pump e.g. lubricating oil pump, for e.g. vehicle`s transmission, has suction and pressure areas in fluid connection with respective intermediate areas, where volume of areas is increased and/or decreased via rotation of wheel and pin |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4366645B2 (en) * | 2003-11-06 | 2009-11-18 | アイシン精機株式会社 | Engine oil supply device |
| JP5076484B2 (en) * | 2006-12-19 | 2012-11-21 | 株式会社ジェイテクト | Electric pump unit and electric oil pump |
-
2019
- 2019-08-31 CN CN201910819490.0A patent/CN110469500B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63176683A (en) * | 1987-01-17 | 1988-07-20 | Mitsubishi Motors Corp | Trochoid type pump |
| JPH02153281A (en) * | 1988-12-06 | 1990-06-12 | Yamada Seisakusho:Kk | Trochoid type oil pump |
| CN1711422A (en) * | 2002-12-19 | 2005-12-21 | 乔马-流体机械有限公司 | Variable volume flow rotor pump |
| DE102006025367A1 (en) * | 2006-06-01 | 2007-12-06 | Bayerische Motoren Werke Ag | Gear pump e.g. lubricating oil pump, for e.g. vehicle`s transmission, has suction and pressure areas in fluid connection with respective intermediate areas, where volume of areas is increased and/or decreased via rotation of wheel and pin |
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| Publication number | Publication date |
|---|---|
| CN110469500A (en) | 2019-11-19 |
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Effective date of registration: 20210105 Address after: 201599 building 3, 350 nanyanggang East Road, Shanyang Town, Jinshan District, Shanghai Applicant after: SHANGHAI RUDI FLUID CONVEYOR Co.,Ltd. Address before: Building J, micron Industrial Park, No.1, Tangwei TANGMING Road, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Duan Jingsheng |
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