CN110469500A - A kind of constant pressure variable displacement pump - Google Patents
A kind of constant pressure variable displacement pump Download PDFInfo
- Publication number
- CN110469500A CN110469500A CN201910819490.0A CN201910819490A CN110469500A CN 110469500 A CN110469500 A CN 110469500A CN 201910819490 A CN201910819490 A CN 201910819490A CN 110469500 A CN110469500 A CN 110469500A
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- China
- Prior art keywords
- variable
- oil
- chute
- pump case
- hydraulic fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims description 33
- 210000000515 tooth Anatomy 0.000 claims description 15
- 238000000605 extraction Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000003921 oil Substances 0.000 description 59
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
-
- 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
Landscapes
- 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 present invention relates to a kind of constant pressure variable displacement pumps, including pump case, interior to be equipped with inlet port, oil outlet, installation cavity；Left end cap and right end cap are fixedly mounted on the both ends of pump case；Drive shaft is rotatably connected in pump case；Internal rotor and outer rotor, are located in installation cavity；Valve plate；Variable Control component.This constant pressure variable displacement pump, structure is simple, volume compact, at low cost, can complete the function of existing constant-pressure variable according to oil outlet pressure automatic variable.
Description
Technical field
The invention belongs to the technical field of oil pump more particularly to a kind of constant pressure variable displacement pumps.
Background technique
Hydraulic Power Transmission System has many advantages, and application is more and more extensive, and wherein constant pressure variable displacement pump is that usage amount is bigger
Hydraulic Elements.Constant pressure variable displacement pump is so that it is changed swashplate angle to realize pump using the variable cylinder of constant pressure valve control plunger pump
Variable, before the outlet pressure of pump is not up to constant pressure valve setting pressure, constant pressure variable displacement pump with maximum discharge capacity output flow, when
When the outlet pressure of pump reaches constant pressure valve setting pressure, output flow can automatically achieve zero.Position is closed in use changes
Into the hydraulic system of valve, if not configuring unloading valve using constant displacement pump, it will keep no-load power loss very big, and if adopted
After constant pressure variable displacement pump, pump will incite somebody to action, at this moment the power loss of constant-voltage system under state of pressure keeping without the pressure of valve and pipeline
It is smaller.Equally, in electrohydraulic servo system, generally require the constant pressure energy, using constant pressure variable displacement pump as it the constant pressure energy the most
Properly, because this can be such that the power loss of system minimizes.Big flow or the big stream of instantaneous needs are needed certain
In the system of amount, in order to reduce the installed capacity of system, accumulator transmission system is often used.Pervious accumulator transmission system
In, the Constant Pump System closed frequently with more pump groups using termination of pumping or stops part when system reaches the maximum pressure of accumulator
Otherwise the method for pump will make system generate very big power loss, and use constant pressure pumping system, then makes the hydraulic and electrical of equipment
System is all greatly simplified.But constant pressure variable displacement pump in the prior art, generally plunger pump form, be provided with constant pressure valve, swash plate,
The composition such as plunger, bulb, swash plate returning spring, structure is complicated, requirement on machining accuracy is high, assembly is cumbersome, overall cost is high.
Summary of the invention
The technical problem to be solved by the present invention is to provide for above-mentioned state of the art, a kind of structure is simple, processes
Constant pressure variable displacement pump that is convenient, assembling crescent gear pump form simple, at low cost.
The technical scheme of the invention to solve the technical problem is: a kind of constant pressure variable displacement pump, it is characterised in that: packet
Pump case is included, inlet port and oil outlet is equipped in pump case along the installation cavity being axially arranged with positioned at left end opening, pump case, is set in pump case
Have to be connected to inlet port and the suction passage of installation cavity and the oil drain passage to be connected to oil outlet and right installation cavity；
Left end cap, left end cap are fixedly connected on the left end of pump case, to block the left opening of installation cavity；
Right end cap, right end cap are fixedly connected on the right end of pump case；
Drive shaft, drive shaft are rotatably coupled in pump case, and the right end of drive shaft reaches outside right end cap；
Internal rotor and outer rotor, internal rotor and outer rotor are rotatably located in installation cavity, and internal rotor is fixedly connected on drive
On moving axis and there is multiple external tooths, outer rotor and internal rotor eccentric setting, be equipped with multiple external tooth phases with internal rotor in outer rotor
The internal tooth of engagement is formed with oil suction area and oil extraction area between the external tooth of the internal rotor and the internal tooth of outer rotor；
Valve plate, valve plate fixation are located in installation cavity, and valve plate is equipped be connected with oil suction area second with chute
And first to be connected with oil extraction area matches chute；
Variable Control component, Variable Control component are located in pump case, when the pressure of oil outlet is less than preset value, the change
Amount control assembly control second is connected to chute with suction passage, first is connected to chute with oil drain passage；When the pressure of oil outlet
When power is greater than preset value, the Variable Control component control first is connected to suction passage with chute, second with chute.
Preferably, the Variable Control component includes Variable Control disk, variable spool, spring, upper end is equipped in pump case
The valve opening of opening, variable spool are slidably connected in the valve opening；Screw plug is equipped at the upper end opening of the valve opening；Spring is located at
For forcing variable spool to move to screw plug direction in valve opening；Liquid controling cavity, variable are formed between the upper end and screw plug of variable spool
It is formed with pressure oil port, oil return opening, the first hydraulic fluid port and the second hydraulic fluid port between spool and valve opening, liquid controling cavity, pressure oil port and go out
Hydraulic fluid port is connected, and oil return opening is connected with inlet port；
The bottom of installation cavity is equipped with circular groove, and Variable Control disk is rotatably connected in circular groove, in circular groove around
Its center of circle is equipped with arc groove, and Variable Control disk is equipped with the protrusive board protruded into arc groove；One end of protrusive board and arc groove
Between form the first control chamber, the other end of protrusive board and arc groove forms the second control chamber, the first hydraulic fluid port and the first control chamber
It is connected, the second hydraulic fluid port is connected with the second control chamber；When variable spool is close to screw plug, pressure oil port and the first hydraulic fluid port connect
Logical, oil return opening is connected to the second hydraulic fluid port；When variable spool is far from screw plug, pressure oil port is connected to the second hydraulic fluid port, the first hydraulic fluid port
It is connected to the return port；
Variable Control disk is equipped with symmetrical first and matches head piece with head piece and second；When protrusive board is located on arc groove
When end, second is connected to chute with suction passage with head piece by second, and first connects first with chute and oil drain passage with head piece
It is logical；When protrusive board is located at arc groove lower end, first with head piece and second is with chute, second by first with chute with head piece
It is connected to suction passage.
Preferably, the side wall of installation cavity is equipped with right locating slot, valve plate is equipped with the positioning matched with locating slot
Block.
It preferably, first is symmetrically arranged on valve plate with chute and second with chute, and is crescent.
Compared with the prior art, the advantages of the present invention are as follows: the present invention may be implemented by setting Variable Control component
When oil outlet pressure is not up to setting value, the crescent gear pump of internal rotor and outer rotor composition is exported with maximum pump discharge；When out
When hydraulic fluid port pressure reaches predetermined pressure, oil extraction area is connected to suction passage by Variable Control component, makes crescent gear pump
Off-load, to be automatically performed the variable of crescent gear pump.The configuration of the present invention is simple, volume compact, manufacturing cost are low, within
The form of intermeshing gear pump realizes constant-pressure variable control, can substitute constant pressure variable plunger pump on a large scale.
Detailed description of the invention
Fig. 1 is the three dimensional structure diagram of the embodiment of the present invention；
Fig. 2 is the three-dimensional configuration schematic diagram of the embodiment of the present invention；
Fig. 3 is the main view of the embodiment of the present invention；
Fig. 4 is the top view of the embodiment of the present invention；
Fig. 5 is the A-A cross-sectional view in Fig. 3；
Fig. 6 is the F-F the schematic diagram of the section structure in Fig. 3；
Fig. 7 is the B-B structural schematic diagram in Fig. 3；
Fig. 8 is the C-C structural schematic diagram in Fig. 4；
Fig. 9 is the three dimensional structure diagram of valve plate in the embodiment of the present invention；
Figure 10 is the three dimensional structure diagram of pump case in the embodiment of the present invention；
Figure 11 is the three dimensional structure diagram of Variable Control disk in the embodiment of the present invention；
Figure 12 is working condition of the Variable Control disk in non-variable amount in the embodiment of the present invention；
Figure 13 is working condition of the Variable Control disk in variable in the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
It as shown in figures 1-13, is a preferred embodiment of the present invention.
A kind of constant pressure variable displacement pump, including
Pump case 1, pump case 1 is interior to be equipped with 101 He of inlet port along the installation cavity 1a being axially arranged with positioned at left end opening, pump case 1
Oil outlet 102, pump case 1 is interior to be equipped with to be connected to inlet port 101 with the suction passage 103 of installation cavity 1a and to be connected to oil outlet
The oil drain passage 104 of 102 and right installation cavity 1a.
Left end cap 2, left end cap 2 are fixedly connected on the left end of pump case 1, to block the left opening of installation cavity 1a.
Right end cap 3, right end cap 3 are fixedly connected on the right end of pump case 1.
Drive shaft 4, drive shaft 4 are rotatably coupled in pump case 1, and the right end of drive shaft 4 reaches outside right end cap 3.
Internal rotor 6 and outer rotor 5, internal rotor 6 and outer rotor 5 are rotatably located in installation cavity 1a, and internal rotor 6 is fixed to be connected
Connect in drive shaft 4 and have multiple external tooths, outer rotor 5 and 6 eccentric setting of internal rotor, be equipped in outer rotor 5 it is multiple with interior turn
The internal tooth that the external tooth of son 6 is meshed, is formed with oil suction area and oil extraction between the external tooth of the internal rotor 6 and the internal tooth of outer rotor 5
Area.
Valve plate 7, the fixation of valve plate 7 are located in installation cavity 1a, and valve plate 7 is equipped with second to be connected with oil suction area and matches
Chute 72 and be connected with oil extraction area first with chute 71, first is symmetrically arranged at flow with chute 72 with chute 71 and second
It on disk 7, and is crescent.The side wall of installation cavity 1a is equipped with right locating slot 108, and valve plate 7 is equipped with and 108 phase of locating slot
The locating piece 73 of cooperation.
Variable Control component, Variable Control component are located in pump case 1, when the pressure of oil outlet 102 is less than preset value, institute
State that Variable Control component control second be connected to chute 72 with suction passage 103, first with chute 71 and the company of oil drain passage 104
It is logical；When the pressure of oil outlet 102 is greater than preset value, the Variable Control component control first matches chute with chute 71, second
72 are connected to suction passage 103.The Variable Control component includes Variable Control disk 8, variable spool 9b, spring 9c, pump case 1
The interior valve opening equipped with upper end opening, variable spool 9b are slidably connected in the valve opening；It is equipped at the upper end opening of the valve opening
Screw plug 9a；Spring 9c is located in valve opening for forcing variable spool 9b to move to the direction screw plug 9a；The upper end of variable spool 9b with
Liquid controling cavity 9a1 is formed between screw plug 9a, and pressure oil port P, oil return inlet T, the first hydraulic fluid port A are formed between variable spool 9b and valve opening
It is connected with oil outlet 102 with the second hydraulic fluid port B, liquid controling cavity 9a1, pressure oil port P, oil return inlet T is connected with inlet port 101.
The bottom of installation cavity 1a is equipped with circular groove, and Variable Control disk 8 is rotatably connected in circular groove, around its center of circle in circular groove
Equipped with arc groove 107, Variable Control disk 8 is equipped with the protrusive board 81 protruded into arc groove 107；Protrusive board 81 and arc groove
The first control chamber 8a, the other end the second control chamber 8b of formation of protrusive board 81 and arc groove 107, the are formed between 107 one end
One hydraulic fluid port A is connected with the first control chamber 8a, and the second hydraulic fluid port B is connected with the second control chamber 8b；When variable spool 9b is close to spiral shell
When stifled 9a, pressure oil port P is connected to the first hydraulic fluid port A, and oil return inlet T is connected to the second hydraulic fluid port B；When variable spool 9b is far from screw plug 9a
When, pressure oil port P is connected to the second hydraulic fluid port B, and the first hydraulic fluid port A is connected to oil return inlet T；Variable Control disk 8 is equipped with symmetrical
First with head piece 801 and second match head piece 802；When protrusive board 81 is located at 107 upper end of arc groove, second matches head piece 802 will
Second is connected to chute 72 with suction passage 103, and first is connected to chute 71 with oil drain passage 104 with head piece 801 by first；When
When protrusive board 81 is located at 107 lower end of arc groove, first with head piece 801 and second is by first with chute 71, the with head piece 802
Two are connected to chute 72 with suction passage 103.
The constant pressure variable displacement pump at work, needs for drive shaft 4 to be connected to the motor, and electrical power drives 4 revolving speed of drive shaft,
Drive shaft 4 drives internal rotor 6 to rotate, and due to the meshing relation of internal rotor 6 and outer rotor 5, internal rotor 6 drives outer rotor 5 to rotate.
When the setting pressure for being not above spring 9c when the pressure in oil outlet 102 is lower, the variable spool under the active force of spring 9c
9b is connected to close to screw plug 9a, pressure oil port P with the first hydraulic fluid port A, and oil return inlet T is connected to the second hydraulic fluid port B, the oil liquid of the first hydraulic fluid port A
Relief printing plate 81 is pushed to rotate to the right the upper end of arc groove 107 into the first control chamber 8a, the oil liquid of the second control chamber 8b is through second
Hydraulic fluid port B, oil return inlet T flow into inlet port 101, and second is connected to chute 72 with suction passage 103 with head piece 802 by second, and first
First is connected to chute 71 with oil drain passage 104 with head piece 801.Hydraulic oil passes through inlet port 101, suction passage 103, second
Enter oil suction area with chute 72, then enters oil outlet 102 after matching chute 71, oil drain passage 104 by oil extraction area, first.At this point,
The flow of constant pressure variable displacement pump output of the invention is maximum stream flow.
When the pressure rise in oil outlet 102 is more than the setting pressure of spring 9c, variable spool 9b is in oil outlet 102
Screw plug 9a is moved down away under active force, pressure oil port P is connected to the second hydraulic fluid port B, and the first hydraulic fluid port A is connected to oil return inlet T, the
The oil liquid of two hydraulic fluid port B enters the lower end that the second control chamber 8b pushes relief printing plate 81 to rotate to the left arc groove 107, and first matches head piece
801 with second be to be connected to first with chute 72 with suction passage 103 with chute 71, second with head piece 802, such oil extraction area
It is connected by Variable Control disk 8 and with suction passage 103 namely crescent gear pump off-load is no longer defeated to oil outlet 102
Outflow realizes energy conservation.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of constant pressure variable displacement pump, it is characterised in that: including
Pump case (1), pump case (1) is interior to be equipped with inlet port (101) along the installation cavity (1a) for being axially arranged with left end opening, pump case (1)
With oil outlet (102), the interior suction passage (103) being equipped with to be connected to inlet port (101) and installation cavity (1a) of pump case (1) and use
To be connected to the oil drain passage (104) of oil outlet (102) and right installation cavity (1a)；
Left end cap (2), left end cap (2) are fixedly connected on the left end of pump case (1), to block the left opening of installation cavity (1a)；
Right end cap (3), right end cap (3) are fixedly connected on the right end of pump case (1)；
Drive shaft (4), drive shaft (4) are rotatably coupled in pump case (1), and the right end of drive shaft (4) reaches right end cap (3)
Outside；
Internal rotor (6) and outer rotor (5), internal rotor (6) and outer rotor (5) are rotatably located in installation cavity (1a), internal rotor
(6) it is fixedly connected on drive shaft (4) and there is multiple external tooths, outer rotor (5) and internal rotor (6) eccentric setting, outer rotor (5)
The interior internal tooth being meshed equipped with multiple external tooths with internal rotor (6), the external tooth of the internal rotor (6) and the internal tooth of outer rotor (5)
Between be formed with oil suction area and oil extraction area；
Valve plate (7), valve plate (7) is fixed to be located in installation cavity (1a), and valve plate (7) is equipped with the to be connected with oil suction area
Two with chute (72) and be connected with oil extraction area first with chute (71)；
Variable Control component, Variable Control component are located in pump case (1), when the pressure of oil outlet (102) is less than preset value, institute
State that Variable Control component control second is connected to chute (72) with suction passage (103), first matches chute (71) and oil drain passage
(104) it is connected to；When the pressure of oil outlet (102) is greater than preset value, Variable Control component control first with chute (71),
Second is connected to suction passage (103) with chute (72).
2. constant pressure variable displacement pump according to claim 1, it is characterised in that: the Variable Control component includes Variable Control disk
(8), variable spool (9b), spring (9c), the interior valve opening for being equipped with upper end opening of pump case (1), variable spool (9b) are slidably connected at
In the valve opening；Screw plug (9a) is equipped at the upper end opening of the valve opening；Spring (9c) is located in valve opening for forcing variable flow valve
Core (9b) is moved to the direction screw plug (9a)；Liquid controling cavity (9a1) is formed between the upper end and screw plug (9a) of variable spool (9b), variable
Pressure oil port (P), oil return opening (T), the first hydraulic fluid port (A) and the second hydraulic fluid port (B), liquid controling cavity are formed between spool (9b) and valve opening
(9a1), pressure oil port (P) are connected with oil outlet (102), and oil return opening (T) is connected with inlet port (101)；
The bottom of installation cavity (1a) is equipped with circular groove, and Variable Control disk (8) is rotatably connected in circular groove, in circular groove
Arc groove (107) are equipped with around its center of circle, Variable Control disk (8) is equipped with the protrusive board (81) protruded into arc groove (107)；It is convex
Formed between plate (81) and one end of arc groove (107) the first control chamber (8a), protrusive board (81) and arc groove (107) it is another
One end forms the second control chamber (8b), and the first hydraulic fluid port (A) is connected with the first control chamber (8a), the second hydraulic fluid port (B) and the second control
Chamber (8b) processed is connected；When variable spool (9b) is close to screw plug (9a), pressure oil port (P) is connected to the first hydraulic fluid port (A), oil return
Mouth (T) is connected to the second hydraulic fluid port (B)；When variable spool (9b) is far from screw plug (9a), pressure oil port (P) and the second hydraulic fluid port (B)
Connection, the first hydraulic fluid port (A) are connected to oil return opening (T)；
Variable Control disk (8) is equipped with symmetrical first and matches head piece (802) with head piece (801) and second；When protrusive board (81)
When positioned at arc groove (107) upper end, second is connected to chute (72) with suction passage (103) with head piece (802) by second, the
One is connected to chute (71) with oil drain passage (104) with head piece (801) by first；When protrusive board (81) is located at arc groove (107)
When lower end, first with head piece (801) and second with head piece (802) be by first with chute (71), second match chute (72) and
Suction passage (103) connection.
3. constant pressure variable displacement pump according to claim 1, it is characterised in that: the side wall of installation cavity (1a) is equipped with right locating slot
(108), valve plate (7) is equipped with the locating piece (73) matched with locating slot (108).
4. constant pressure variable displacement pump according to claim 1, it is characterised in that: first matches chute (72) with chute (71) and second
It is symmetrically arranged on valve plate (7), and is 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 true CN110469500A (en) | 2019-11-19 |
| CN110469500B CN110469500B (en) | 2021-01-15 |
Family
ID=68514475
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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63176683A (en) * | 1987-01-17 | 1988-07-20 | Mitsubishi Motors Corp | trochoidal pump |
| JPH02153281A (en) * | 1988-12-06 | 1990-06-12 | Yamada Seisakusho:Kk | Trochoid type oil pump |
| US20050098385A1 (en) * | 2003-11-06 | 2005-05-12 | Aisin Seiki Kabushiki Kaisha | Oil supply system for engine |
| 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 |
| US20100008797A1 (en) * | 2006-12-19 | 2010-01-14 | Jtekt Corporation | Electric pump unit and electric oil pump |
-
2019
- 2019-08-31 CN CN201910819490.0A patent/CN110469500B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63176683A (en) * | 1987-01-17 | 1988-07-20 | Mitsubishi Motors Corp | trochoidal 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 |
| US20050098385A1 (en) * | 2003-11-06 | 2005-05-12 | Aisin Seiki Kabushiki Kaisha | Oil supply system for engine |
| 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 |
| US20100008797A1 (en) * | 2006-12-19 | 2010-01-14 | Jtekt Corporation | Electric pump unit and electric oil pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110469500B (en) | 2021-01-15 |
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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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