EP2878822A1 - Multistage oil pump - Google Patents
Multistage oil pump Download PDFInfo
- Publication number
- EP2878822A1 EP2878822A1 EP13791334.9A EP13791334A EP2878822A1 EP 2878822 A1 EP2878822 A1 EP 2878822A1 EP 13791334 A EP13791334 A EP 13791334A EP 2878822 A1 EP2878822 A1 EP 2878822A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- rotor case
- oil
- rotors
- spacer
- 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.)
- Withdrawn
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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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
- F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
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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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
-
- 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
- F04C2/10—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
- F04C2/102—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 the two members rotating simultaneously around their respective axes
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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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
Definitions
- the present invention relates to a multistage oil pump which is used particularly for automobiles, and the like.
- Patent Document 1 Japanese Patent Application Laid-open No. 2006-161614
- the multistage oil pump of the present invention is a multistage oil pump, two rotors being connected in series in the direction of the rotation axis, the respective rotors being accommodated in a rotor case separately across a spacer, the inside thereof being partitioned by the spacer part, the rotor case being in the form of an integral cylindrical part, and the spacer part being integral with the rotor case.
- the present invention features that the rotors and the rotor case are made of a ferrous material.
- the present invention features that the rotor case is fixed to a housing by positioning pins.
- the rotors are not accommodated directly in the housing, but the rotors are accommodated in the rotor case, the rotor case being accommodated in the housing, whereby the multistage oil pump of the present invention can also be used in an application where the pressure and the temperature are high.
- Amultistage oil pump 1 includes a housing 2; a cover 3, which closes the housing 2; a rotor case 4, which is accommodated in the housing 2; and first and second rotors 6, 7, which are accommodated in the rotor case 4, being connected in series.
- the housing 2 is bottomed and cylindrical, having a pump discharge port 21.
- the rotor case 4 is in the form of an integral cylindrical part, and the central part in the longitudinal direction thereof is partitioned by a spacer 5.
- the rotor case 4 provides a first rotor case 41 on one end side and a second rotor case 42 on the other end side, being partitioned by the spacer 5. From the one face and the other face of the rotor case 4, positioning pins 8 are protruded, respectively.
- a first rotor suction port 43 is provided in a side face of the rotor case 4.
- first rotor case 41 the first rotor 6 is accommodated, while, in the second rotor case 42, the second rotor 7 is accommodated.
- first rotor case 41 a circular first rotor accommodating bore 411, the axis of which is made eccentric with respect to the first rotor case 41, is formed.
- second rotor case 42 a circular second rotor accommodating bore 421, the axis of which is made eccentric with respect to the second rotor case 42, is formed.
- the first rotor case 41 and the second rotor case 42 are provided, the axis of the first rotor accommodating bore 411 and that of the second rotor accommodating bore 421 being offset from each other.
- the spacer 5 is formed of a ferrous material.
- a ferrous material specifically, an iron-copper-carbon based material, SMF4030 (JPMA standard), or the like, can be used.
- the spacer 5 is provided with an insertion hole 51 for the drive shaft 11, a first rotor discharge port 52, and a second rotor suction port 53.
- the first rotor discharge port 52 is formed in one face of the spacer 5, while the second rotor suction port 53 being formed in the other face of the spacer 5, the first rotor discharge port 52 and the second rotor suction port 53 being communicated to each other.
- a side plate 9 is disposed between the second rotor case 42 and the housing 2. With the side plate 9, an insertion hole 91 for the drive shaft 11, and a second rotor discharge port 92 are provided in a disk, which has the same outside diameter as that of the rotor case 4.
- the positioning pins 8, which are protruded from the one face of the rotor case 4, are fitted to the housing 2, thereby jointing the rotor case 4 to the housing 2 as shown in Figure 4 or 5 .
- the positioning pins 8, which are protruded from the other face of the rotor case 4, are fitted to the cover 3, thereby jointing the rotor case 4 to the cover 3.
- a first inner rotor 62 is disposed inside of a first outer rotor 61, the first rotor 6 being formed of a ferrous material.
- the ferrous material specifically, an iron-copper-carbon based material, SMF4030 (JPMA standard), or the like, can be used.
- an oil filling hole 611 is provided in a disk, which has an outside diameter substantially equal to the inside diameter of the first rotor accommodating bore 411, the first outer rotor 61 being rotatably disposed in the first rotor accommodating bore 411.
- the oil filling hole 611 is provided, the axis thereof being aligned to the axis of the first outer rotor 61.
- first outer rotor 61 and the first inner rotor 62 there are formed four oil accommodating chambers which are partitioned by the inner peripheral part of the oil filling hole 611, the outer peripheral part of the first inner rotor 62, the spacer 5, and the cover 3.
- the first inner rotor 62 is fixed to the drive shaft 11, being disposed in the first outer rotor 61 with the axis of the drive shaft 11 being aligned to the axis of the first rotor case 41.
- the second inner rotor 72 is disposed inside of the second outer rotor 71.
- an oil filling hole 711 is provided in a disk, which has the same shape as that of the first outer rotor 61, the second outer rotor 71 being rotatably disposed in the second rotor accommodating bore 421.
- the second inner rotor 72 has the same shape as that of the first inner rotor 62, being disposed in the second outer rotor 71 with the axis of the drive shaft 11 being aligned to the axis of the second rotor case 42.
- the oil discharged from the first rotor discharge port 52 by the respective oil accommodating chambers of the first rotor 6 is sucked from the second rotor suction port 53 into the respective oil accommodating chambers of the second rotor 7.
- the first rotor accommodating bore 411 is offset with respect to the second rotor accommodating bore 421, and therefore, as the respective oil accommodating chambers of the first rotor 6 increase their volumes, the respective oil accommodating chambers of the second rotor 7 decrease their volumes.
- the oil discharged from the first rotor discharge port 52 is sucked from the second rotor suction port 53 in its entirety by the respective oil accommodating chambers of the second rotor 7 that are increasing their volumes.
- the rotors 6, 7 are not accommodated directly in the housing 2, but the rotors 6, 7 are accommodated in the rotor case 4, the rotor case 4 being accommodated in the housing 2, whereby the multistage oil pump of the present invention can also be used in an application where the pressure and the temperature are high.
- the rotors 6, 7 and the rotor case 4 are made of a ferrous material, whereby the thermal expansion can be suppressed for providing an improved accuracy of oil flow rate.
- the application where the rotors 6, 7 and the rotor case 4 are formed of a ferrous material has been explained, however, only either of the rotors 6, 7 and the rotor case 4 may be formed of a ferrous material. Further, the method of jointing the rotor case 4 is optional, and is not limited to that which uses the positioning pins 8.
- the symbol 1 denotes a multistage oil pump; 11 a drive shaft; 12 a sealing material; 2 a housing; 21 a pump discharge port; 22 a fitting hole; 3 a cover; 31 a fitting hole; 4 a rotor case; 41 a first rotor case; 411 a first rotor accommodating bore; 412 a fitting hole; 42 a second rotor case; 421 a second rotor accommodating bore; 422 a fitting hole; 43 a first rotor suction port; 5 a spacer; 51 an insertion hole; 52 a first rotor discharge port; 53 a second rotor suction port; 6 a first rotor; 61 a first outer rotor; 611 an oil filling hole; 62 a first inner rotor; 7 a second rotor; 71 a second outer rotor; 711 an oil filling hole; 72 a second inner rotor; 8 a positioning pin; 9 a side plate; 91 an insertion hole; 92 a
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
Description
- The present invention relates to a multistage oil pump which is used particularly for automobiles, and the like.
- Conventionally, there have been proposed multistage oil pumps in which a plurality of rotors are connected in series (for example, refer to Patent Document 1). As shown in
Figure 1 inPatent Document 1, trochoid pumps (rotors) 4, 5 are directly accommodated in a housingmain body 1 which is bottomed and cylindrical. - Patent Document 1: Japanese Patent Application Laid-open No.
2006-161614 - However, with the above-mentioned structure, the trochoid pumps are not cased, and therefore the multistage oil pump disclosed in
Patent Document 1 could not have been used in an application where the pressure or the temperature is high. - It is an object of the present invention to provide a multistage oil pump which can solve the above-mentioned problem.
- In order to solve such a problem, the multistage oil pump of the present invention is a multistage oil pump, two rotors being connected in series in the direction of the rotation axis, the respective rotors being accommodated in a rotor case separately across a spacer, the inside thereof being partitioned by the spacer part, the rotor case being in the form of an integral cylindrical part, and the spacer part being integral with the rotor case.
- Further, the present invention features that the rotors and the rotor case are made of a ferrous material.
- Further, the present invention features that the rotor case is fixed to a housing by positioning pins.
- In accordance with the present invention, the rotors are not accommodated directly in the housing, but the rotors are accommodated in the rotor case, the rotor case being accommodated in the housing, whereby the multistage oil pump of the present invention can also be used in an application where the pressure and the temperature are high.
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Figure 1 is a perspective view of a multistage oil pump in one embodiment of the present invention; -
Figure 2 is an exploded perspective view of the multistage oil pump inFigure 1 when viewed from the cover side; -
Figure 3 is an exploded perspective view of the multistage oil pump inFigure 1 when viewed from the housing side; -
Figure 4 is a sectional view taken in the direction of the arrows of the line A-A inFigure 1 ; and -
Figure 5 is another sectional view taken in the direction of the arrows of the line A-A inFigure 1 . - Hereinbelow, with reference to the drawings, the best mode for carrying out the present invention will be explained.
-
Amultistage oil pump 1 includes ahousing 2; acover 3, which closes thehousing 2; arotor case 4, which is accommodated in thehousing 2; and first andsecond rotors rotor case 4, being connected in series. - The
housing 2 is bottomed and cylindrical, having apump discharge port 21. Therotor case 4 is in the form of an integral cylindrical part, and the central part in the longitudinal direction thereof is partitioned by aspacer 5. Therotor case 4 provides afirst rotor case 41 on one end side and asecond rotor case 42 on the other end side, being partitioned by thespacer 5. From the one face and the other face of therotor case 4, positioningpins 8 are protruded, respectively. In a side face of therotor case 4, a firstrotor suction port 43 is provided. - In the
first rotor case 41, thefirst rotor 6 is accommodated, while, in thesecond rotor case 42, thesecond rotor 7 is accommodated. In thefirst rotor case 41, a circular firstrotor accommodating bore 411, the axis of which is made eccentric with respect to thefirst rotor case 41, is formed. In thesecond rotor case 42, a circular secondrotor accommodating bore 421, the axis of which is made eccentric with respect to thesecond rotor case 42, is formed. Thefirst rotor case 41 and thesecond rotor case 42 are provided, the axis of the firstrotor accommodating bore 411 and that of the secondrotor accommodating bore 421 being offset from each other. - The
spacer 5 is formed of a ferrous material. As the ferrous material, specifically, an iron-copper-carbon based material, SMF4030 (JPMA standard), or the like, can be used. - The
spacer 5 is provided with aninsertion hole 51 for the drive shaft 11, a firstrotor discharge port 52, and a secondrotor suction port 53. The firstrotor discharge port 52 is formed in one face of thespacer 5, while the secondrotor suction port 53 being formed in the other face of thespacer 5, the firstrotor discharge port 52 and the secondrotor suction port 53 being communicated to each other. - Between the
second rotor case 42 and thehousing 2, aside plate 9 is disposed. With theside plate 9, aninsertion hole 91 for the drive shaft 11, and a secondrotor discharge port 92 are provided in a disk, which has the same outside diameter as that of therotor case 4. - The
positioning pins 8, which are protruded from the one face of therotor case 4, are fitted to thehousing 2, thereby jointing therotor case 4 to thehousing 2 as shown inFigure 4 or5 . Thepositioning pins 8, which are protruded from the other face of therotor case 4, are fitted to thecover 3, thereby jointing therotor case 4 to thecover 3. - With the
first rotor 6, a firstinner rotor 62 is disposed inside of a firstouter rotor 61, thefirst rotor 6 being formed of a ferrous material. As the ferrous material, specifically, an iron-copper-carbon based material, SMF4030 (JPMA standard), or the like, can be used. With the firstouter rotor 61, anoil filling hole 611 is provided in a disk, which has an outside diameter substantially equal to the inside diameter of the firstrotor accommodating bore 411, the firstouter rotor 61 being rotatably disposed in the firstrotor accommodating bore 411. Theoil filling hole 611 is provided, the axis thereof being aligned to the axis of the firstouter rotor 61. - Between the first
outer rotor 61 and the firstinner rotor 62, there are formed four oil accommodating chambers which are partitioned by the inner peripheral part of theoil filling hole 611, the outer peripheral part of the firstinner rotor 62, thespacer 5, and thecover 3. - The first
inner rotor 62 is fixed to the drive shaft 11, being disposed in the firstouter rotor 61 with the axis of the drive shaft 11 being aligned to the axis of thefirst rotor case 41. - With the
second rotor 7, the secondinner rotor 72 is disposed inside of the secondouter rotor 71. With the secondouter rotor 71, anoil filling hole 711 is provided in a disk, which has the same shape as that of the firstouter rotor 61, the secondouter rotor 71 being rotatably disposed in the secondrotor accommodating bore 421. The secondinner rotor 72 has the same shape as that of the firstinner rotor 62, being disposed in the secondouter rotor 71 with the axis of the drive shaft 11 being aligned to the axis of thesecond rotor case 42. - Between the second
outer rotor 71 and the secondinner rotor 72, there are formed four oil accommodating chambers which are partitioned by the inner peripheral part of theoil filling hole 711, the outer peripheral part of the secondinner rotor 72, and theside plate 9. - Next, the operation of the
multistage oil pump 1 will be explained. - Let's assume that, to the respective oil accommodating chambers in the
first rotor 6, oil has already been supplied from the firstrotor suction port 43. When the drive shaft 11 is rotated, the firstouter rotor 61 is rotated by the firstinner rotor 62 in the direction of rotation of the drive shaft 11, the respective oil accommodating chambers being also moved around the drive shaft 11. The respective oil accommodating chambers increase their volumes as they are moved away from the drive shaft 11, sucking the oil from the firstrotor suction port 43 by the amount equal to the respective volumes increased. Further, the respective oil accommodating chambers decrease their volumes as they approaches the drive shaft 11, discharging the oil from the firstrotor discharge port 52 by the amount equal to the respective volumes decreased. - Let's assume that, to the respective oil accommodating chambers of the second
outer rotor 71, oil has already been supplied from the secondrotor suction port 53. When the drive shaft 11 is rotated, the secondouter rotor 71 is rotated by the secondinner rotor 72 in the direction of rotation of the drive shaft 11, the respective oil accommodating chambers being also moved around the drive shaft 11. The respective oil accommodating chambers increase their volumes as they are moved away from the drive shaft 11, sucking the oil from the secondrotor suction port 53 by the amount equal to the respective volumes increased. Further, the respective oil accommodating chambers decrease their volumes as they approach the drive shaft 11, discharging the oil from theoil discharge port 92 by the amount equal to the respective volumes decreased. - The oil discharged from the first
rotor discharge port 52 by the respective oil accommodating chambers of thefirst rotor 6 is sucked from the secondrotor suction port 53 into the respective oil accommodating chambers of thesecond rotor 7. The firstrotor accommodating bore 411 is offset with respect to the secondrotor accommodating bore 421, and therefore, as the respective oil accommodating chambers of thefirst rotor 6 increase their volumes, the respective oil accommodating chambers of thesecond rotor 7 decrease their volumes. Thus, the oil discharged from the firstrotor discharge port 52 is sucked from the secondrotor suction port 53 in its entirety by the respective oil accommodating chambers of thesecond rotor 7 that are increasing their volumes. - According to the present embodiment, the
rotors housing 2, but therotors rotor case 4, therotor case 4 being accommodated in thehousing 2, whereby the multistage oil pump of the present invention can also be used in an application where the pressure and the temperature are high. - Further, according to the present embodiment, the
rotors rotor case 4 are made of a ferrous material, whereby the thermal expansion can be suppressed for providing an improved accuracy of oil flow rate. - In the above-described embodiment, the application where the
rotors rotor case 4 are formed of a ferrous material has been explained, however, only either of therotors rotor case 4 may be formed of a ferrous material. Further, the method of jointing therotor case 4 is optional, and is not limited to that which uses the positioning pins 8. - Further, in the above-described embodiment, the application where the oil is supplied from the
spacer 5 side in therotor case 4 to the respective oil accommodating chambers in the firstouter rotor 61 has been explained, however, there may be a configuration in which the oil is supplied from thecover 3 side. Further, there may be a configuration in which the oil is supplied to the respective oil accommodating chambers from thecover 3 through thehousing 2. - The
symbol 1 denotes a multistage oil pump; 11 a drive shaft; 12 a sealing material; 2 a housing; 21 a pump discharge port; 22 a fitting hole; 3 a cover; 31 a fitting hole; 4 a rotor case; 41 a first rotor case; 411 a first rotor accommodating bore; 412 a fitting hole; 42 a second rotor case; 421 a second rotor accommodating bore; 422 a fitting hole; 43 a first rotor suction port; 5 a spacer; 51 an insertion hole; 52 a first rotor discharge port; 53 a second rotor suction port; 6 a first rotor; 61 a first outer rotor; 611 an oil filling hole; 62 a first inner rotor; 7 a second rotor; 71 a second outer rotor; 711 an oil filling hole; 72 a second inner rotor; 8 a positioning pin; 9 a side plate; 91 an insertion hole; 92 a second rotor discharge port; and 94 a fitting hole.
Claims (3)
- A multistage oil pump, two rotors being connected in series in the direction of the rotation axis, said respective rotors being accommodated in a rotor case separately across a spacer, the inside thereof being partitioned by the spacer part, said rotor case being in the form of an integral cylindrical part, and said spacer part being integral with said rotor case.
- The multistage oil pump according to Claim 1, wherein said rotors and said rotor case are made of a ferrous material.
- The multistage oil pump according to Claim 1 or 2, wherein said rotor case is fixed to a housing by positioning pins.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012113481A JP2013238210A (en) | 2012-05-17 | 2012-05-17 | Multistage oil pump |
PCT/JP2013/063651 WO2013172410A1 (en) | 2012-05-17 | 2013-05-16 | Multistage oil pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2878822A1 true EP2878822A1 (en) | 2015-06-03 |
EP2878822A4 EP2878822A4 (en) | 2016-03-30 |
Family
ID=49583813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13791334.9A Withdrawn EP2878822A4 (en) | 2012-05-17 | 2013-05-16 | Multistage oil pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20150167665A1 (en) |
EP (1) | EP2878822A4 (en) |
JP (1) | JP2013238210A (en) |
CN (1) | CN104302917A (en) |
WO (1) | WO2013172410A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104728584B (en) * | 2013-12-19 | 2018-06-19 | 北京宝沃汽车有限公司 | For the rotor-type oil pump and engine of engine |
KR101453429B1 (en) * | 2014-01-09 | 2014-10-22 | 주식회사 신행 | For high-pressure two-component high viscosity liquid transfer pump double-row structure of the trochoidal |
KR102150608B1 (en) * | 2014-02-25 | 2020-09-01 | 엘지이노텍 주식회사 | Electric pump |
CN104196719A (en) * | 2014-08-29 | 2014-12-10 | 西北工业大学 | Multi-stage internal meshing aircraft fuel gear pump |
CN104481630A (en) * | 2014-12-12 | 2015-04-01 | 隆鑫通用动力股份有限公司 | Driving pin fixed engine oil pump |
CN104595054B (en) * | 2014-12-12 | 2018-06-19 | 隆鑫通用动力股份有限公司 | crankcase cover with fixed drive pin |
CN205877674U (en) * | 2016-04-11 | 2017-01-11 | 湖北三江船艇科技有限公司 | Ships and light boats petrol engine parallel rotor oil pump |
CN106051441B (en) * | 2016-08-03 | 2018-07-31 | 湖南机油泵股份有限公司 | A kind of output displacement can be changed duplex impeller pump and its control system |
US10247295B1 (en) * | 2018-10-22 | 2019-04-02 | GM Global Technology Operations LLC | Transfer case oil pump assembly |
CN111997893B (en) * | 2020-09-10 | 2022-10-14 | 中国计量大学 | Flexible low linear velocity tooth-type molded line meshing wearable pump for robot arm |
Family Cites Families (13)
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DE3909831A1 (en) * | 1989-03-25 | 1990-09-27 | Becker Kg Gebr | Sliding-vane rotary pump designed for dry running, and method for manufacturing it |
CN2104328U (en) * | 1991-06-19 | 1992-05-13 | 王丕正 | No-oil concentric vacuum-pump |
JPH06323261A (en) * | 1993-05-18 | 1994-11-22 | Honda Motor Co Ltd | Oil pump |
JP3635671B2 (en) * | 1993-12-10 | 2005-04-06 | ユニシア ジェーケーシー ステアリングシステム株式会社 | Double cartridge type oil pump |
JPH10252674A (en) * | 1997-03-07 | 1998-09-22 | Seiko Seiki Co Ltd | Gas compressor |
JPH1122656A (en) * | 1997-07-04 | 1999-01-26 | Matsushita Electric Ind Co Ltd | Solution pump for absorption heat pump and manufacture thereof |
US6481991B2 (en) * | 2000-03-27 | 2002-11-19 | Denso Corporation | Trochoid gear type fuel pump |
JP4007130B2 (en) * | 2002-09-10 | 2007-11-14 | 株式会社豊田自動織機 | Vacuum pump |
JP2006161614A (en) | 2004-12-03 | 2006-06-22 | Hitachi Ltd | Tandem type trochoid pump |
DE102007022215A1 (en) * | 2007-05-11 | 2008-11-13 | Robert Bosch Gmbh | Pump assembly for synchronous pressurization of two fluid columns |
JP2009215932A (en) * | 2008-03-10 | 2009-09-24 | Hitachi Ltd | Tandem pump and tandem pump for brake devices |
JP5334829B2 (en) * | 2009-12-22 | 2013-11-06 | 日立オートモティブシステムズ株式会社 | Pump device |
US8225767B2 (en) * | 2010-03-15 | 2012-07-24 | Tinney Joseph F | Positive displacement rotary system |
-
2012
- 2012-05-17 JP JP2012113481A patent/JP2013238210A/en active Pending
-
2013
- 2013-05-16 US US14/401,598 patent/US20150167665A1/en not_active Abandoned
- 2013-05-16 CN CN201380025648.8A patent/CN104302917A/en active Pending
- 2013-05-16 WO PCT/JP2013/063651 patent/WO2013172410A1/en active Application Filing
- 2013-05-16 EP EP13791334.9A patent/EP2878822A4/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
JP2013238210A (en) | 2013-11-28 |
CN104302917A (en) | 2015-01-21 |
WO2013172410A1 (en) | 2013-11-21 |
EP2878822A4 (en) | 2016-03-30 |
US20150167665A1 (en) | 2015-06-18 |
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