CN113250958A - Pump core structure of electric vacuum pump for automobile - Google Patents
Pump core structure of electric vacuum pump for automobile Download PDFInfo
- Publication number
- CN113250958A CN113250958A CN202110597229.8A CN202110597229A CN113250958A CN 113250958 A CN113250958 A CN 113250958A CN 202110597229 A CN202110597229 A CN 202110597229A CN 113250958 A CN113250958 A CN 113250958A
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- Prior art keywords
- pump chamber
- pump
- rotor
- upper cover
- electric vacuum
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- 239000000463 material Substances 0.000 claims description 19
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical group [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Images
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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
本发明提供一种汽车用电动真空泵的泵芯结构，所述泵芯包括泵室下盖、泵室、转子、泵室上盖、多个叶片、多个锁紧螺钉和补偿片，所述补偿片设置在所述泵室上盖上；多个所述叶片插入连接所述转子上开设的多个槽体中；所述转子设置在所述泵室中，所述泵室下盖和泵室上盖分别设置在所述泵室的两侧，多个所述锁紧螺钉插入连接所述泵室下盖、泵室上盖和泵室的通孔中，装配后，所述补偿片和转子之间存在距离。本申请保证各温度下转子和补偿片之间间隙基本保持不变，真空泵抽真空性能始终稳定。
The invention provides a pump core structure of an electric vacuum pump for an automobile. The pump core includes a lower cover of a pump chamber, a pump chamber, a rotor, an upper cover of the pump chamber, a plurality of blades, a plurality of locking screws and a compensation piece. The sheet is arranged on the upper cover of the pump chamber; a plurality of the blades are inserted into a plurality of grooves opened on the rotor; the rotor is arranged in the pump chamber, the lower cover of the pump chamber and the pump chamber The upper covers are respectively arranged on both sides of the pump chamber, and a plurality of the locking screws are inserted into the through holes connecting the lower cover of the pump chamber, the upper cover of the pump chamber and the pump chamber. There is a distance between them. The application ensures that the gap between the rotor and the compensation sheet remains basically unchanged at various temperatures, and the vacuum pumping performance of the vacuum pump is always stable.
Description
Technical Field
The invention relates to an electric vacuum pump, in particular to a pump core structure of the electric vacuum pump, which is arranged in an automobile braking system.
Background
With the development of science and technology and the advancement of technology, automobile products are changing day by day, and higher requirements are also put forward on parts and components, and the automobile parts are important fields participating in globalization in the automobile industry in China. Due to rapid progress of automobile driving modes, more and more automobiles rely on an external vacuum source to provide boosting vacuum during braking, so that electric vacuum pumps for automobiles are more and more widely used.
In the prior art, for example, patent nos. 201611149458.9 and 201810134802.X both disclose an electric vacuum pump using a rotary vane vacuum pump, which has the following problems in use:
1. during use, high-speed friction exists between a rotor (consisting of the rotor and blades) and a stator, the rotor and the stator are easy to generate heat after running for a period of time, and because the stator and the rotor are made of different materials and have different expansion amounts (the expansion amount of the stator of a general rotary vane pump is greater than that of the rotor), the gap between the stator and the rotor is increased, and the vacuum pumping performance of the vacuum pump is reduced;
2. due to the high-temperature expansion characteristic, the requirement on the dimensional stability of stator and rotor materials is high, and materials with small thermal expansion coefficients need to be selected.
Thus, the prior art electric vacuum pumps have a place to lift.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide a pump core structure of an electric vacuum pump for an automobile, which is convenient to install and has a compensator, so as to solve the technical problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pump core structure of an electric vacuum pump for an automobile comprises a pump chamber lower cover, a pump chamber, a rotor, a pump chamber upper cover, a plurality of blades, a plurality of locking screws and a compensating plate, wherein the compensating plate is arranged on the pump chamber upper cover; the blades are inserted into a plurality of groove bodies formed in the rotor; the rotor is arranged in the pump chamber, the pump chamber lower cover and the pump chamber upper cover are respectively arranged on two sides of the pump chamber, the locking screws are inserted into through holes which are connected with the pump chamber lower cover, the pump chamber upper cover and the pump chamber, and after assembly, a distance exists between the compensating plate and the rotor.
According to the pump core structure of the electric vacuum pump for the automobile in the preferred embodiment of the application, the compensation sheet is adhered to the upper cover of the pump chamber by the adhesive.
According to the pump core structure of the electric vacuum pump for the automobile in the preferred embodiment of the application, the compensation plate is arranged on the upper cover of the pump chamber in a convex-concave structure.
According to the pump core structure of the electric vacuum pump for the automobile in the preferred embodiment of the application, the material of the pump chamber is aluminum magnesium alloy, and the material of the compensation plate is polytetrafluoroethylene.
The technical scheme of this application to the improvement of the vacuum pump of current series rotary-vane, designs a section and has the pump core structure of the automobile electric vacuum pump of shim, guarantees that the clearance remains unchanged basically between rotor and the shim under each temperature, and vacuum pump evacuation performance is stable all the time, and the reliability is high, improves life.
Due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:
firstly, the application ensures that the clearance between the rotor and the compensating plate is basically kept unchanged at various temperatures, and the vacuum pumping performance of the vacuum pump is always stable;
secondly, the requirement on the dimensional stability of materials such as a pump chamber and a compensating plate is low, the selection range is wide, the materials with lower cost can be selected, and the cost is effectively reduced;
thirdly, this application compensating plate can select wear-resisting lubricated material, reduces rotor wear, increases life.
Of course, it is not necessary for any particular embodiment of the inventive concept to be implemented to achieve all of the above technical effects at the same time.
Drawings
FIG. 1 is a schematic view of a prior art pump core prior to thermal expansion;
FIG. 2 is a schematic view of a prior art post heat expansion pump core;
FIG. 3 is a schematic view of a vacuum pump according to the present application;
FIG. 4 is a schematic exploded view of the pump cartridge structure of the present application;
FIG. 5 is a schematic view of the pump core prior to thermal expansion of the present application;
FIG. 6 is a schematic view of the core after thermal expansion according to the present application.
Detailed Description
Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and so forth have not been described in detail so as not to unnecessarily obscure aspects of the present invention.
Referring to fig. 1 and 2, a pump core before heat expansion and a pump core after heat expansion in the prior art are shown, wherein the pump core is composed of an original pump chamber lower cover 21, an original pump chamber 22, an original rotor 23, a plurality of original blades 24 and an original pump chamber upper cover 25; after the pump core is assembled, as shown in fig. 1, a small gap S is left between the original rotor 23 and the original pump chamber upper cover 25 at normal temperature, so that the original rotor 23 can freely rotate in the original pump chamber 22 and is not blocked. In fig. 1, at normal temperature, the height D of the original pump chamber 22, the height Z of the original rotor 23, and the gap S; in the operation process, the original rotor 23 and the original pump chamber 22 are heated and expanded, the height of the original pump chamber 22 is changed into D + delta D, the height of the original rotor 23 is changed into Z + delta Z, and the gap is changed into S + delta S; the original pump chamber 22 has a coefficient of thermal expansion of alphaDThe primary rotor 23 having a coefficient of thermal expansion of alphaZMaterial alpha of general rotary vane pumpD＞αZTherefore, Δ D > Δ Z, and Δ S ═ Δ D- Δ Z, so that Δ S > 0, the gap between the original rotor 23 and the original pump chamber upper cover 25 increases, and the vacuum pumping performance of the vacuum pump decreases; please refer to table 1 below.
Under the condition that the vacuum degree reaches 50% from normal temperature to 120 ℃, the time taken by the vacuum pump for pumping vacuum is increased from 3.6 seconds to 4.2 seconds, which is increased by about 17%; in addition, under the condition that the vacuum degree reaches 70% from normal temperature to 120 ℃, the time taken by the vacuum pump to vacuumize is increased from 7 seconds to 8.1 seconds, the time is increased by about 16%, and the efficiency of the vacuum pump to vacuumize is reduced by 16% to 17% after the temperature is increased.
Please refer to fig. 3 and 4, which are schematic diagrams of the vacuum pump structure and the pump core structure of the present application; the power of the vacuum pump is from a direct current motor, the vacuum pump comprises a pump core, a motor output shaft 1, an end cover 2, a driving block 3, a sealing ring 4, a silencing ring 6 and an outer cover 7, the driving block 3 is arranged on the motor output shaft 1 to drive the pump core to rotate, the motor and the pump core are both arranged on the end cover 2, an air inlet and an air outlet are arranged on the end cover 2, and the air inlet is connected with a vacuum chamber; a sealing ring 4 is arranged between the pump core part and the end cover 2 to prevent air leakage; the air pumped by the pump core is exhausted through the exhaust port. The voice coil 6 and the outer cover 7 play roles of noise reduction and dust prevention; the connection relationship of the various components is prior art and will not be described here.
In addition, the pump core comprises a pump chamber lower cover 8, a pump chamber 9, a rotor 10, a pump chamber upper cover 11, a plurality of vanes 12, a plurality of locking screws 13 and a compensating plate 5, wherein the compensating plate 5 is arranged on the pump chamber upper cover 11; the blades 12 are inserted into and connected with a plurality of groove bodies formed on the rotor 10; the rotor 10 is disposed in the pump chamber 9, the pump chamber lower cover 8 and the pump chamber upper cover 11 are respectively disposed at both sides of the pump chamber 9, as shown in the upper and lower sides of the figure, a plurality of locking screws 13 are inserted into through holes connecting the pump chamber lower cover 8, the pump chamber upper cover 11 and the pump chamber 9, the locking screws 13 assemble these parts into the pump core, and after the assembly, a distance exists between the compensator 5 and the rotor 10.
As shown in FIG. 5, a compensation layer is added on the lower surface of the upper cover 11 of the pump chamber, namely, the compensation layer is addedSheet 5, height D of pump chamber 9 at room temperature0Height Z of rotor 100Height B and clearance S of compensating plate 50(ii) a During operation, the rotor 10 and the pump chamber 9 are heated and expanded, and the height of the pump chamber 9 is changed to D0+ΔD0The height of the rotor 10 becomes Z0+ΔZ0The height of the shim 5 is B + Δ B and the gap is S0+ΔS0(ii) a The pump chamber 9 has a coefficient of thermal expansion of alphaDThe rotor 10 has a coefficient of thermal expansion of alphaZThe compensator 5 has a coefficient of thermal expansion of alphaBSelecting material to obtain alphaB＞αD＞αZAnd Δ S0＝ΔD0-(ΔZ0+ Delta B), reasonably selecting the height B of the compensating plate 5 to make Delta D0＝ΔZ0+ Δ B, so that Δ S ≈ 0, the gap between the rotor 10 and the compensator 5 is kept substantially unchanged at each temperature, and the vacuum pumping performance of the vacuum pump is always stable and does not decrease; please refer to table 2 below.
Under the condition that the vacuum degree reaches 50% from normal temperature to 120 ℃, the time taken by the vacuum pump for pumping vacuum is increased from 3.6 seconds to 3.65 seconds, and the increase is about 1% without difference; in addition, under the condition that the vacuum degree reaches 70% from normal temperature to 120 ℃, the time taken by the vacuum pump for pumping vacuum is reduced from 7.1 seconds to 7 seconds, basically, no difference exists, and the performance of the vacuum pump for pumping vacuum is always stable and does not decrease after the temperature is increased.
In addition, regarding the connection relationship between the compensator 5 and the pump chamber upper cover 11, in one embodiment, the compensator 5 is adhered to the pump chamber upper cover 11 with an adhesive. In another embodiment, the compensator 5 is disposed on the pump chamber upper cover 11 in a convex-concave structure, for example, a groove is formed on a side surface of the compensator 5, a convex strip is disposed on a corresponding side surface of the pump chamber upper cover 11, and the convex strip is inserted into the groove to combine the two together; for another example, a concave hole is formed in a side surface of the compensator 5, a protrusion is provided on a side surface of the pump chamber upper cover 11 corresponding thereto, and the protrusion is inserted into the concave hole to combine the two together, but the present application is not limited thereto, and the scope of the present application should be limited as long as the compensator 5 can be provided on the pump chamber upper cover 11.
Preferably, the parts in the embodiment of the present application are made of aluminum-magnesium alloy (hereinafter referred to as ADC6), wherein the magnesium content is about 2.5-4%, and the parts have the characteristics of hot brittleness, corrosion resistance, oxidizable coloring, and the like; the material of the compensator 5 is teflon, but it should not be construed as limiting the application, and the scope of the application should be limited as long as the material maintains a stable gap according to the design requirements.
As mentioned above, after many tests, tabulated as Table 2 above, the performance of the pump core structure of the present application is stable at different temperatures. The cost of selected part materials is low, the assembly cost is effectively reduced, the economic benefit is increased, and the lower cover 8, the pump chamber 9 and the upper cover 11 of the pump chamber are made of ADC 6; the material of the compensating plate 5 is polytetrafluoroethylene, is a high molecular polymer prepared by polymerization of tetrafluoroethylene as a monomer, has excellent heat resistance and cold resistance, has the characteristics of acid resistance, alkali resistance, various organic solvents resistance and high temperature resistance, and has extremely low friction coefficient, so the lubricating effect is realized; in the embodiment, the compensating plate 5 is connected to the pump chamber upper cover 11 by coating and bonding.
In summary, due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:
firstly, the application ensures that the clearance between the rotor and the compensating plate is basically kept unchanged at various temperatures, and the vacuum pumping performance of the vacuum pump is always stable;
secondly, the requirement on the dimensional stability of materials such as a pump chamber and a compensating plate is low, the selection range is wide, the materials with lower cost can be selected, and the cost is effectively reduced;
thirdly, this application compensating plate can select wear-resisting lubricated material, reduces rotor wear, increases life.
The preferred embodiments of the invention are provided solely to aid in the illustration of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents. The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and it is intended that all equivalent variations and modifications of the present invention as those skilled in the art can be made without departing from the spirit and scope of the present invention.
Claims (4)
1. The pump core structure of the electric vacuum pump for the automobile is characterized in that the pump core comprises a pump chamber lower cover, a pump chamber, a rotor, a pump chamber upper cover, a plurality of blades, a plurality of locking screws and a compensating plate, wherein the compensating plate is arranged on the pump chamber upper cover; the blades are inserted into a plurality of groove bodies formed in the rotor; the rotor is arranged in the pump chamber, the pump chamber lower cover and the pump chamber upper cover are respectively arranged on two sides of the pump chamber, the locking screws are inserted into through holes which are connected with the pump chamber lower cover, the pump chamber upper cover and the pump chamber, and after assembly, a distance exists between the compensating plate and the rotor.
2. The pump cartridge structure of an electric vacuum pump for automobiles according to claim 1, wherein the shim is adhered to the pump chamber upper cover with an adhesive.
3. The pump cartridge structure of an electric vacuum pump for automobiles according to claim 1, wherein the compensator is provided in a convex-concave structure on the pump chamber upper cover.
4. The pump cartridge structure of an electric vacuum pump for automobiles according to claim 1, wherein the material of the pump chamber is an aluminum magnesium alloy and the material of the shim is polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110597229.8A CN113250958A (en) | 2021-05-31 | 2021-05-31 | Pump core structure of electric vacuum pump for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110597229.8A CN113250958A (en) | 2021-05-31 | 2021-05-31 | Pump core structure of electric vacuum pump for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113250958A true CN113250958A (en) | 2021-08-13 |
Family
ID=77185362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110597229.8A Pending CN113250958A (en) | 2021-05-31 | 2021-05-31 | Pump core structure of electric vacuum pump for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113250958A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2040264A1 (en) * | 1969-04-26 | 1971-01-22 | Asbest Und Gummiwerke | Rubber PTFE caps coveres dilation compensator |
| WO1992014931A1 (en) * | 1991-02-22 | 1992-09-03 | Lubrication Research, Inc. | Pump with variable clearance compensator end plate |
| US5211267A (en) * | 1992-02-24 | 1993-05-18 | Prince Corporation | Temperature compensated rotary damper |
| US5876192A (en) * | 1996-11-08 | 1999-03-02 | Ford Global Technologies, Inc. | Differential expansion control assembly for a pump |
| KR20030016959A (en) * | 2001-08-23 | 2003-03-03 | 현대자동차주식회사 | Oil pump |
| DE102012102156A1 (en) * | 2011-03-31 | 2012-10-04 | Ixetic Bad Homburg Gmbh | Pump, particularly gerotor pump, vane pump, roller cell pump, sickle pump or internal gear pump, has rotating group with connecting portion for rotationally fixing with drive shaft, where rotating group is arranged in outer ring |
| CN110985381A (en) * | 2019-12-22 | 2020-04-10 | 吉林东光奥威汽车制动系统有限公司 | A car electric vacuum pump |
| CN214837115U (en) * | 2021-05-31 | 2021-11-23 | 宁波洛卡特汽车零部件有限公司 | Pump core structure of electric vacuum pump for automobile |
-
2021
- 2021-05-31 CN CN202110597229.8A patent/CN113250958A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2040264A1 (en) * | 1969-04-26 | 1971-01-22 | Asbest Und Gummiwerke | Rubber PTFE caps coveres dilation compensator |
| WO1992014931A1 (en) * | 1991-02-22 | 1992-09-03 | Lubrication Research, Inc. | Pump with variable clearance compensator end plate |
| US5211267A (en) * | 1992-02-24 | 1993-05-18 | Prince Corporation | Temperature compensated rotary damper |
| US5876192A (en) * | 1996-11-08 | 1999-03-02 | Ford Global Technologies, Inc. | Differential expansion control assembly for a pump |
| KR20030016959A (en) * | 2001-08-23 | 2003-03-03 | 현대자동차주식회사 | Oil pump |
| DE102012102156A1 (en) * | 2011-03-31 | 2012-10-04 | Ixetic Bad Homburg Gmbh | Pump, particularly gerotor pump, vane pump, roller cell pump, sickle pump or internal gear pump, has rotating group with connecting portion for rotationally fixing with drive shaft, where rotating group is arranged in outer ring |
| CN110985381A (en) * | 2019-12-22 | 2020-04-10 | 吉林东光奥威汽车制动系统有限公司 | A car electric vacuum pump |
| CN214837115U (en) * | 2021-05-31 | 2021-11-23 | 宁波洛卡特汽车零部件有限公司 | Pump core structure of electric vacuum pump for automobile |
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