CN110469501A - Vane pump and its rotor blade - Google Patents
Vane pump and its rotor blade Download PDFInfo
- Publication number
- CN110469501A CN110469501A CN201810446813.1A CN201810446813A CN110469501A CN 110469501 A CN110469501 A CN 110469501A CN 201810446813 A CN201810446813 A CN 201810446813A CN 110469501 A CN110469501 A CN 110469501A
- Authority
- CN
- China
- Prior art keywords
- blade
- projection
- outer end
- thickness
- base portion
- 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.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 33
- 239000000446 fuel Substances 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 18
- 239000012530 fluid Substances 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 9
- 230000007704 transition Effects 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification 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
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003442 weekly effect 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- 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
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F04C2/3442—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
A kind of blade of vane pump includes: base portion (13), is inserted in the blade groove (8) of the rotor (3) of vane pump, and is oriented to and can be slided by blade groove (8)；And the projection (14) stretched out from base portion (13) along blade height direction, the outer end (12) of projection (14) is suitable for pushing and pressing in the inner peripheral surface of blade pump stator (2), and thickness of the projection (14) at least in its outer end (12) is less than the thickness of base portion (13)；Wherein, the outer end (12) of projection (14) forms arc cylinder (18), and the arc cylinder (18) is to be moved along width of blade direction by a curve as bus and limited.
Description
Technical field
This application involves a kind of vane pump blades with improved wear resistance, and the blade comprising this blade
Pump.
Background technique
Vane pump is widely used in various equipment, for providing to equipment there is the liquid of required pressure and flow to be situated between
Matter, such as fuel oil.Traditional vane pump includes stator and prejudicially arranges rotor in the stator.It is radially formed in the rotor
Multiple blade grooves, blade reciprocally can be stretched out and be retreated in respective blade groove.As rotor is driven to rotate, each blade
The inner peripheral surface sliding contact of outer end and stator.In this way, by being enclosed between the inner peripheral surface of stator, the peripheral surface of rotor and blade
At each operating room in experience volume variation, and from entrance sucking stator in fuel oil by from the peripheral surface of rotor stretch out
Blade pressurization, then by outlet discharge.
When blade outer end is slided along stator inner peripheral surface, blade outer end has the tendency that abrasion.It is worn in blade outer end
When to a certain extent, the performance of vane pump will receive influence, such as deviate expected output pressure and flow, vibration and noise water
Flat increase etc..Accordingly, it is desirable to be able to slow down the abrasion of blade outer end.
Summary of the invention
The application is intended to provide a kind of improved vane pump blade, and the abrasion of outer end can be effectively suppressed.
According to a kind of embodiments possible of the application, a kind of blade of vane pump is provided comprising: base portion, quilt
It is configured and adapted in the blade groove for being inserted in the rotor of vane pump, and is oriented to and can be slided by blade groove；And from base portion edge
The projection that blade height direction is stretched out, the outer end of projection are configured to be suitable for pushing against in the inner peripheral surface of blade pump stator,
And thickness of the projection at least in its outer end is less than the thickness of base portion；Wherein, the outer end of projection forms arc cylinder, described
Arc cylinder is to be moved along width of blade direction by a curve as bus and limited.
According to another embodiments possible of the application, provide a kind of vane pump, especially in engine, especially
The petrolift of fuel is conveyed in diesel engine system, comprising: stator；It arranges rotor in the stator, is formed in rotor more
A blade groove；And it is arranged in the foregoing blade in each blade groove, the blade is suitable in corresponding blade
It reciprocally stretches out and retreats in slot.
According to the application, the outer end of vane pump blade forms arc cylinder, it can be ensured that protects in the whole circle rotation of blade
It is continuous on the arc cylinder and smoothly transition to hold the contact site between blade outer end and stator inner peripheral surface, and liquid
Deielectric-coating is easy to form and maintains between blade outer end and stator inner peripheral surface, so as to inhibit blade outer end along stator
Abrasion caused by inner peripheral surface sliding.In this way, the service life of blade can extend, and vane pump can keep its property for a long time
Energy.
Detailed description of the invention
Fig. 1 is according to a kind of structural schematic diagram of the vane pump of embodiment of the application；
Fig. 2 is the front view of the blade in vane pump；
Fig. 3 is the side sectional view of blade；
Fig. 4 is the top view of blade；
The schematic diagram of state when Fig. 5,6 are blade outer ends along the sliding of stator inner peripheral surface；
Fig. 7,8 be the outer end of existing vane pump blade as a comparison case along the sliding of stator inner peripheral surface when state show
It is intended to.
Specific embodiment
Some embodiments of the vane pump of the application are described with reference to the accompanying drawings.The vane pump of the application can be used for
Various forms of liquid mediums are pumped in various occasions.For example, a specific example of the vane pump of the application is engine system
For supplying the fuel pump of fuel oil, especially diesel pump in system.
As shown in Figure 1, including shell 1, the stator being fixed in shell 12 and bias according to a kind of vane pump of the application
Ground is arranged in stator 2 and rotatable rotor 3.Rotor 3 is mounted in shaft 4, so that shaft 4 drives rotor 3 to rotate.In
When applied to engine system, shaft 4 can provide rotary power by engine or by outer other power sources.
Rotor 3 defines axially, radially and tangentially.
It is placed in stator 2 surely since rotor 3 is eccentric, between the inner peripheral surface of stator 2 and the peripheral surface of rotor 3
The gap 5 for rotating angle with rotor and changing is produced, i.e., maximal clearance is gradually increased to from zero clearance, then again between maximum
Gap gradually decreases to zero clearance.
It is formed with the lead channel 6 of arc in stator 2, and is substantially mirrored into the sump pit 7 of setting with lead channel 6.Feed liquor
Slot 6 is connected to respectively at inlet with leakage fluid dram (not shown) with sump pit 7.Lead channel 6 and sump pit 7 are opened in stator 2 and are turned
Gap 5 between son 3.
Multiple blade grooves 8 are radially formed in rotor 3, the radial outer end of these blade grooves 8 is opened in gap 5, radial
The annular fluid passage 9 that inner end is communicated in rotor 3.
Arrange that a blade 10, blade 10 can reciprocally extend radially out in respective blade groove 8 in each blade groove 8
And retrogressing.In each blade groove 8, respective vanes 10 inner end disposed inboard a compressed spring 11, for by blade
10 radially outward push, so that the radial outer end 12 of each blade 10 be kept to be pushed on the inner peripheral surface of stator 2.
As rotor 3 is turned around by the driving rotation of shaft 4, the outer end 12 of each blade 10 is slided along the inner peripheral surface of stator 2,
Volume variation is undergone in each operating room crossed in gap 5 by each blade 10, so that from the liquid in inlet sucking stator
It is discharged after body medium is pressurized by leakage fluid dram, to realize a duty cycle.
The application is intended to inhibit the abrasion of the outer end 12 of blade 10, and provides a kind of improved blade 10 thus.This
Apply the improvement to blade 10 based on the understanding of the abrasion mechanism of the outer end 12 to blade 10.Firstly, since the prejudicially cloth of rotor 3
It sets in stator 2, therefore, during rotor 3 is revolved in stator 2 and is turned around, each blade 10 and not always with same portion
The inner peripheral surface of position contact stator 2, but change between different contacts site.If cannot between different contacts site
Steadily and transition glibly, then it may cause the abrasion of the outer end 12 of blade 10.In addition, the outer end 12 of blade 10 and stator 2
Liquid medium film between inner peripheral surface can effectively inhibit the abrasion of the outer end 12 of blade 10.However, if being revolved in rotor 3
This liquid medium film cannot be easily set up when turning, and between the outer end of blade 10 12 and the inner peripheral surface of stator 2
Various contact conditions under cannot securely maintain this liquid medium film, then be also easy to cause the mill of the outer end 12 of blade 10
Damage.
For this purpose, proposing a kind of improved blade 10, as illustrated in figs. 2-4 according to the application.On the whole, blade 10 is big
It causes in the axially extending bulk along vane pump, to limit width W (axial direction that width direction corresponds to rotor 3), height
Spend H (radial direction that short transverse corresponds to rotor 3).
Blade 10 generally includes: base portion 13 is inserted in the blade groove 8 of rotor 3, and is oriented to and energy by blade groove 8
Enough radially slide；And the projection 14 of the substantially lath-shaped to extend radially outwardly from the outer end of base portion 13,14 thickness of projection
Less than the thickness T of base portion 13 (thickness direction corresponds to the tangential of rotor 3), to generate shoulder 15 in 14 two sides of projection.It is prominent
The radial free end of extending portion 14 constitutes the outer end 12.
In base portion 13, it is formed with the inscribe portion 16 recessed from the radial inner end face of base portion 13, for reducing blade 10
Weight.
In addition, being formed with the through hole 17 for extending respectively into shoulder 15 from the radial inner end face of base portion 13 in base portion 13.
The effect of through hole 17 is that connection is established between the radially inner and outer side of blade 10, so that liquid medium can be in the diameter of blade 10
It is flowed between outside inwardly, so as to the pressure of the radially inner and outer side of balance blade 10, enables blade 10 normally radial
Sliding.
One inscribe portion 16 and the thickness direction two sides positioned at the inscribe portion 16 can be set in the middle part of width direction
A pair of of through hole 17.However, the quantity and position of inscribe portion 16 and through hole 17 be not limited to it is shown in figure.It can be in width
Degree arranges multiple inscribe portions 16 and multipair through hole 17 on direction.For example, being symmetrically arranged in more than two in the width direction
Cut the through hole 17 of portion 16 and two pairs or more.Also, through hole 17 needs not be in the thickness direction two sides in inscribe portion 16.This
Outside, through hole 17 is also not necessarily arranged in pairs, but singularization can be set.
The surface of the outer end 12 of blade 10 includes arc cylinder 18 extended in the direction of the width, 18 direction of arc cylinder
The inner peripheral surface of stator 2 bloats, as shown in Figure 3.It is contemplated that in the cross section perpendicular to width direction, outside blade 10
The surface at end 12 is rendered as one section of continuous curve.Using the curve as bus, it is moved in the width direction by projection 14
Entire width limits the arc cylinder 18.
The center of the curve is preferably placed on the width direction center line of blade in the cross section, and has enough arcs
Degree.The radian is chosen such that i.e. during blade 10 turns around with the rotation of rotor 3, the outer end 12 of blade 10 and stator 2
Inner peripheral surface contact position, be all located on the curve (the arc cylinder 18).
It may be noted that the curve of the bus of the arc cylinder 18 of the outer end 12 as blade 10 can be circular arc, elliptic arc,
Other conic sections or the form of their combination that smoothly transits.Also shape between arc cylinder 18 and the two sidewalls of projection 14
At smoothly transitting, to avoid the formation of interference liquid medium film.A kind of mother according to particular implementation, as arc cylinder 18
The curve of line is circular arc, and radian is generally 90 ° to 180 °, preferably 120 ° to 180 °.For example, the curve is semicircle, diameter
Equal to the thickness of outer end 12.
Fig. 5,6 are diagrammatically illustrated when blade 10 rotates to 90 ° and 180 ° with rotor 3 respectively and the inner peripheral surface of stator 2
Between contact condition.Contact condition when blade 10 rotates to 270 ° and 360 ° with rotor 3 between the inner peripheral surface of stator 2
It can similarly envision and.
As can be seen that no matter blade 10 is in any rotation position, due to the setting of the arc cylinder 18 or its radian, all
It can ensure that the position contacted between the outer end 12 and the inner peripheral surface of stator 2 for keeping blade 10 in the whole circle rotation of blade 10 all
It is continuous and smoothly transition from the arc cylinder 18.In addition, between the outer end 12 of blade 10 and the inner peripheral surface of stator 2 each other
The position faced all remains curve, therefore is easy to generate liquid medium film (such as oil film) between.Further, since not having
There is the sharp transition of contact site, liquid medium film is easy to form and maintains between blade outer end and stator inner peripheral surface, from
And abrasion caused by blade outer end can be inhibited to slide along stator inner peripheral surface.In this way, the service life of blade can extend, and
Vane pump can keep its performance for a long time.
As a comparison case, Fig. 7, show a kind of vane pump blade 10 ' of prior art in 8, with generally flat outer
End 12 ', the thickness of outer end 12 ' and the thickness of inner end are equal, and the thickness direction both sides of the edge of outer end 12 ' form small chamfering.Fig. 7
In show that blade 10 ' is in 90 ° of positions, 12 ' rear edge of outer end is contacted with the inner peripheral surface of stator 2 at this time.Later, blade
10 ' rotate to 180 ° of positions with rotor 3, and generally the front and rear edges of outer end 12 ' is contacted with the inner peripheral surface of stator 2 at this time.In
After turning over 180 ° of positions, the leading edge of outer end 12 ' is contacted with the inner peripheral surface of stator 2.It may be flat outer due to blade 12 '
End face, and since the outer end front and rear edges of each blade 12 ' in a duty cycle of rotor 3 is alternately and in stator 2
Weekly form face contact is less susceptible to form continuous and stable liquid medium between the outer end of blade 10 ' and the inner peripheral surface of stator 2
Film.To embody the blade 10 of the application principle Fig. 5,6 the case where with Fig. 7 of the prior art, 8 the case where compared with, it is to be understood that
Continuous and stable liquid medium film is more readily formed between the blade and stator of the application.
(such as scheme in addition, extending to front end face from blade trailing flank with through hole in some prior art blade pump blades
7, shown in 8) the case where compare, the through hole 17 in the blade of the application extends to 14 liang of projection by the rear end face of blade 10
The shoulder 15 of side, therefore, bigger space of the through hole 17 in gap 5, to be easier so that liquid medium is passing through
It is flowed in through-hole 17, to more easily, more rapidly realize the pressure balance of the radially inner and outer two sides of blade 10.
Various transformations can be made without departing from the principle of the application according to the vane pump of the application and its blade 10.Example
Such as, according to a kind of alternate embodiments, annular fluid passage 9 can be connected to leakage fluid dram or sump pit 7.For example, annular fluid passage 9 and row
(it can be not shown in the figure by additional fluid passage or conduit between liquid mouth or sump pit 7 and realize connection.In this way, annular fluid passage 9
It is middle to be full of the liquid medium with pressure, and its pressure is equal to the medium pressure liquid in leakage fluid dram or sump pit 7.In this way,
The medium pressure liquid difference that can use between annular fluid passage 9 and lead channel 6 radially outward releases blade 10.In such case
Under, it is possible to cancel through hole 17, and it is possible to cancel compressed spring 11, or the lesser compression of spring constant can be used
Spring 11.
In addition, according to a kind of alternate embodiments, in order to increase the intensity of projection 14, the thickness of projection 14 can be made
Degree is gradually increased backward along short transverse, it might even be possible to which cancelling shoulder, (through hole can be opened directly in this projection 14
On side).Therefore, generally, in the blade of the application 10, projection 14 is arranged at least small in the thickness of its outer end 12
In the thickness of base portion 13.The thickness of outer end 12 can for base portion 13 thickness less than half, preferably 1/3 or less.
In addition, the rotor outer periphery and stator inner circumferential in vane pump as shown in the figure are all circular.However, it is to be appreciated that fixed
Sub- inner circumferential can be structured as ellipse, wherein one end arrangement of the rotor close to the long axis of oval stator inner circumferential；Alternatively, can incite somebody to action
It is arranged in rotor pair in oval stator inner circumferential, and the stator inner circumferential position relative to each other at rotor outer periphery and ellipse short shaft
It is tangent, so that rotor realizes two duty cycles for each revolution.The fit system of other rotors and stator is also feasible.
In addition, blade groove is arranged radially along rotor in vane pump shown in the figure, however, blade groove can also be opposite
An angle is tilted forward or backward radially along rotor direction of rotation in rotor.
In addition, setting in vane pump as shown in the figure, there are four blades.However, the blade of other quantity is also feasible.
Those skilled in the art can according to specific needs make in other structures the vane pump of the application and its blade
Modification.
Although describing the application herein with reference to specific embodiment, scope of the present application is not limited to shown
Details.Without departing from the basic principle of the application, various modifications can be made for these details.
Claims (10)
1. a kind of blade of vane pump, comprising:
Base portion (13) is configured in the blade groove (8) for being adapted for insertion into the rotor (3) of vane pump, and led by blade groove (8)
To and can slide；And
The projection (14) stretched out from base portion (13) along blade height direction, the outer end (12) of projection (14) are configured to be suitable for
It pushes against in the inner peripheral surface of blade pump stator (2), and thickness of the projection (14) at least in its outer end (12) is less than base portion
(13) thickness；
Wherein, the outer end (12) of projection (14) forms arc cylinder (18), and the arc cylinder (18) is by one as female
The curve of line is moved along width of blade direction and is limited.
2. blade as described in claim 1, wherein the radian of the curve is arranged so that, in rotor relative to stator
At any rotation angle, the position that the outer end (12) of projection (14) is contacted with stator inner peripheral surface is all located at the arc cylinder
(18) on.
3. blade as claimed in claim 1 or 2, wherein the curve is between conic section or two or more conic section
Smoothly transit combination, for example, the curve is circular arc, elliptic arc or their combination；
Optionally, smooth mistake is also formed between the two sidewalls on the thickness direction of the arc cylinder (18) and projection (14)
It crosses.
4. blade as claimed any one in claims 1 to 3, wherein be formed with through hole (17), institute in the base portion (13)
Through hole is stated to extend the inner side end on blade height direction along blade height direction since base portion (13)；
Optionally, the quantity of the through hole is at least a pair of, and two pairs of through holes are symmetrical along vane thickness direction each other
Setting.
5. blade according to any one of claims 1 to 4, wherein the inner end thickness of the projection (14) is less than base portion
(13) thickness, to form a pair of of shoulder (15) between base portion (13) and projection (14).
6. the blade as described in any one of claims 1 to 5, wherein the projection (14) is from its outer end (12) into it
Holding has the thickness being gradually increased；
Optionally, less than half of the thickness with a thickness of base portion (13) of the outer end (12) of the projection (14), preferably 1/3 with
Under.
7. such as blade described in any one of claims 1 to 6, wherein be formed in the base portion (13) recessed from its inner face
The inscribe portion (16) entered.
8. the blade as described in any one of claim 5 to 7 is being complied with when claim 4,5, the through hole (17) is opened
Pass through corresponding shoulder (15)；Or
The through hole (17) is opened in the side of the projection (14).
9. blade as claimed in claim 7, when complying in claim 4, the thickness including being located at the through hole (17)
A pair of of through hole (17) of direction two sides.
10. a kind of vane pump conveys the petrolift of fuel especially in engine, especially diesel engine system, comprising:
Stator (2)；
It arranges rotor (3) in the stator, is formed with multiple blade grooves (8) in rotor (3)；And
The blade as claimed in any one of claims 1-9 wherein (10) being arranged in each blade groove (8), the blade
(10) it is suitable for reciprocally stretching out and retreating in corresponding blade groove (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446813.1A CN110469501A (en) | 2018-05-11 | 2018-05-11 | Vane pump and its rotor blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446813.1A CN110469501A (en) | 2018-05-11 | 2018-05-11 | Vane pump and its rotor blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110469501A true CN110469501A (en) | 2019-11-19 |
Family
ID=68504070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810446813.1A Pending CN110469501A (en) | 2018-05-11 | 2018-05-11 | Vane pump and its rotor blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110469501A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5786586A (en) * | 1980-11-15 | 1982-05-29 | Matsushita Electric Works Ltd | Vane motor |
| JPS57148085U (en) * | 1981-03-12 | 1982-09-17 | ||
| JPS58117382A (en) * | 1981-12-29 | 1983-07-12 | Matsushita Electric Ind Co Ltd | Rotary compressor |
| JPH0188091U (en) * | 1987-12-02 | 1989-06-09 | ||
| JP2008286152A (en) * | 2007-05-21 | 2008-11-27 | Panasonic Corp | Airtight compressor |
| CN203925846U (en) * | 2014-05-25 | 2014-11-05 | 辽宁新风企业集团有限公司 | A kind of vane fuel supply pump with spring |
-
2018
- 2018-05-11 CN CN201810446813.1A patent/CN110469501A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5786586A (en) * | 1980-11-15 | 1982-05-29 | Matsushita Electric Works Ltd | Vane motor |
| JPS57148085U (en) * | 1981-03-12 | 1982-09-17 | ||
| JPS58117382A (en) * | 1981-12-29 | 1983-07-12 | Matsushita Electric Ind Co Ltd | Rotary compressor |
| JPH0188091U (en) * | 1987-12-02 | 1989-06-09 | ||
| JP2008286152A (en) * | 2007-05-21 | 2008-11-27 | Panasonic Corp | Airtight compressor |
| CN203925846U (en) * | 2014-05-25 | 2014-11-05 | 辽宁新风企业集团有限公司 | A kind of vane fuel supply pump with spring |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191119 |
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| RJ01 | Rejection of invention patent application after publication |