EP2202410A1 - Gear pump - Google Patents

Gear pump Download PDF

Info

Publication number
EP2202410A1
EP2202410A1 EP07829376A EP07829376A EP2202410A1 EP 2202410 A1 EP2202410 A1 EP 2202410A1 EP 07829376 A EP07829376 A EP 07829376A EP 07829376 A EP07829376 A EP 07829376A EP 2202410 A1 EP2202410 A1 EP 2202410A1
Authority
EP
European Patent Office
Prior art keywords
housing
housings
end surface
particles
gear pump
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Withdrawn
Application number
EP07829376A
Other languages
German (de)
English (en)
French (fr)
Inventor
Tateyuki Shimamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYB Corp
Original Assignee
Kayaba Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Publication of EP2202410A1 publication Critical patent/EP2202410A1/en
Withdrawn legal-status Critical Current

Links

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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • 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
    • 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
    • F01C21/102—Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • 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
    • 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
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid
    • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • 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
    • F04C2240/10—Stators
    • 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
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/70—Safety, emergency conditions or requirements

Definitions

  • This invention relates to a gear pump that discharges a fluid by rotating while a pair of gears are intermeshed.
  • a gear pump provided in an oil pressure device, a water pressure device, and so on includes a body into which a pair of gears is incorporated and a housing that contacts the body.
  • the body and the housing are fastened to each other by a plurality of bolts.
  • a force that attempts to move the housing in a single direction relative to the body is generated by fluid pressure generated in the body.
  • JP6-147133A discloses a conventional gear pump in which processing teeth are formed on an end surface of the body which contacts the housing.
  • processing teeth are formed on an end surface of the body which contacts the housing.
  • This invention provides a gear pump that discharges a fluid by rotating while a pair of gears are intermeshed, comprising a body into which the respective gears are incorporated, a housing that contacts the body, a number of particles that are interposed between an end surface of the body and an end surface of the housing, which contact each other, to prevent positional deviation between the body and the housing, and a plurality of fastening members that fasten the housing to the body.
  • a number of particles are interposed between the end surface of the body and the end surface of the housing, thereby increasing a frictional force generated in a joint portion between the body and the housing such that positional deviation generated between the body and the housing by a fluid pressure in the gear pump can be prevented effectively, and as a result, a pump efficiency of the gear pump can be maintained.
  • a gear pump 1 comprises a body 2 into which a drive gear 11 and a driven gear 12 are incorporated as a pair of gears, and housings 3, 4 that contact the body 2 from either side.
  • Side plates 5, 6 are interposed between respective end faces of the drive gear 11 and driven gear 12 and the housings 3, 4.
  • a gear chamber 9 that houses the drive gear 11 and driven gear 12 is provided on an inner side of the body 2, and the housings 3, 4 contact respective end surfaces 25, 26 of the body 2.
  • the housing 3 includes an end surface 28 that contacts the end surface 25 of the body 2 so as to close one end of the body 2 and function as a mounting flange attached to a support member, not shown in the figure.
  • a seal ring 41 is interposed between the end surface 25 of the body 2 and the housing 3, and the gear chamber 9 is sealed by the seal ring 41.
  • housing 3 may be formed integrally with the body 2.
  • the housing 4 includes an end surface 29 that contacts the end surface 26 of the body 2 and functions as a cover that closes another end of the body 2.
  • a seal 42 is interposed between the end surface 26 of the body 2 and the housing 4, and the gear chamber 9 is sealed by the seal 42.
  • the body 2 and the housings 3, 4 are fastened to each other by four bolts 17 to 20.
  • the body 2 and the housings 3, 4 are fixed by frictional force generated between the end surface 25 and the end surface 28 and frictional force generated between the end surface 26 and the end surface 29.
  • Shafts 13, 15 are formed on either end of the drive gear 11.
  • Shafts 14, 16 are formed on either end of the driven gear 12.
  • the shafts 13, 14 are supported on the housing 3 to be free to rotate via respective bearings 33, 34, while the shafts 15, 16 are supported on the cover 4 to be free to rotate via respective bearings 35, 36.
  • the shaft 15 of the drive gear 11 is driven to rotate in a clockwise direction, as shown by an arrow in FIG. 2 , while the shaft 16 of the driven gear 12 rotates in a counter-clockwise direction, as shown by an arrow in FIG. 2 .
  • a fluid pressure in the high pressure port 22 is higher than a fluid pressure in the low pressure port 23, and therefore a force which attempts to move the housings 3, 4 relative to the body 2 in a direction indicated by an arrow B in FIG. 2 is generated in a joint portion between the body 2 and the housings 3, 4.
  • processing teeth 27 are formed on the end surface 26 of the body 2, as shown in FIG. 2 .
  • processing teeth 27 are formed on the end surface 26 of the body 2.
  • the processing teeth 27 are constituted by cutting a large number of narrow grooves using a milling machine.
  • the processing teeth 27 are formed to extend in a vertical direction that is substantially orthogonal to a slippage direction indicated by the arrow B in FIG. 2 .
  • processing teeth 27 are not limited to this constitution, and may be formed in a mesh form, for example.
  • the body 2 is formed from a harder material than the housings 3, 4.
  • the body 2 is formed from an iron-based material, for example, whereas the housings 3, 4 are respectively formed from an aluminum-based material, for example.
  • a large number of fine particles 30 are interposed in the joint portion between the body 2 and the housings 3, 4 so that positional deviation between the body 2 and the housings 3, 4 is prevented without increasing the cutting depth of the processing teeth 27.
  • the particles 30 are constituted by a material that is harder than the materials of the body 2 and the housings 3, 4, such as shavings of steel, cast iron, carbon material, and so on, for example.
  • the particles 30 dig into the end surfaces 25, 26 of the body 2 and the end surfaces 28, 29 of the housings 3, 4, thereby increasing a frictional force generated along the joint portion between the body 2 and the housings 3, 4 such that positional deviation there-between can be prevented effectively.
  • the particles 30 are intermixed with a coating agent 31 and applied to the two end surfaces 25, 26 of the body 2 together with the coating agent 31.
  • the coating agent 31 adheres to the joint portion between the body 2 and the housings 3, 4, thereby eliminating gaps and preventing corrosion such as electrolytic corrosion.
  • this invention provides the gear pump 1 that discharges fluid by rotating while the drive gear 11 and the driven gear 12 are intermeshed, and comprises the body 2 into which the drive gear 11 and driven gear 12 are incorporated, the housings 3, 4 that contact the body 2, the large number of particles 30 that are interposed between the end surfaces 25, 26 of the body 2 and the end surfaces 28, 29 of the housings 3, 4, which contact each other, to prevent positional deviation between the body 2 and the housings 3, 4, and the plurality of bolts (fastening members) 17 to 20 that fasten the housings 3, 4 to the body 2.
  • the particles 30 are formed from a harder material than the body 2 and the housings 3, 4.
  • the hard particles 30 dig into the end surfaces 25, 26 of the body 2 and the end surfaces 28, 29 of the housings 3, 4, and as a result, positional deviation generated between the body 2 and the housings 3, 4 by the fluid pressure in the gear pump 1 can be prevented effectively.
  • processing teeth 27 are formed on at least one of the end surfaces 25, 26 of the body 2 and the end surfaces 28, 29 of the housings 3, 4, and positional deviation between the body 2 and the housings 3, 4 is prevented via both the particles 30 and the processing teeth 27.
  • the body 2 and the housings 3, 4 are positioned by both the processing teeth 27 and the particles 30, and therefore positional deviation of the housings 3, 4 can be prevented sufficiently even when the cutting depth of the processing teeth 27 is small.
  • fluid leakage between the body 2 and the housings 3, 4 can be prevented by making the cutting depth of the processing teeth 27 small.
  • the particles 30 are intermixed with the coating agent 31, whereupon the particles 30 are applied together with the coating agent 31 to at least one of the end surfaces 25, 26 of the body 2 and the end surfaces 28, 29 of the housings 3, 4.
  • the particles 30 can be distributed evenly over the end surfaces 25, 26 of the body 2 or the end surfaces 28, 29 of the housings 3, 4, and therefore positional deviation generated between the body 2 and the housings 3, 4 by the fluid pressure in the gear pump 1 can be prevented effectively.
  • an anti-corrosion agent as the coating agent 31, corrosion such as electrolytic corrosion can be prevented on the joint portion between the body 2 and the housings 3, 4.
  • the particles 30 are formed from a softer material than the body 2 and the housings 3, 4 such that the particles 30 are compressed between the body 2 and the housings 3, 4. As a result, frictional force is increased via the compressed particles 30.
  • both the end surfaces 25, 26 of the body 2 and the end surfaces 28, 29 of the housings 3, 4 are formed smooth, and positioning is performed between the body 2 and the housings 3, 4 using the particles 30 alone, i.e. without using the processing teeth 27.
  • the gear pump according to this invention is suitable for use as a pump provided in an oil pressure device, a water pressure device, or similar.

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)
EP07829376A 2007-10-02 2007-10-02 Gear pump Withdrawn EP2202410A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/069638 WO2009044491A1 (ja) 2007-10-02 2007-10-02 ギヤポンプ

Publications (1)

Publication Number Publication Date
EP2202410A1 true EP2202410A1 (en) 2010-06-30

Family

ID=40525924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07829376A Withdrawn EP2202410A1 (en) 2007-10-02 2007-10-02 Gear pump

Country Status (6)

Country Link
US (1) US20100202913A1 (ja)
EP (1) EP2202410A1 (ja)
JP (1) JPWO2009044491A1 (ja)
KR (1) KR20100083157A (ja)
CN (1) CN101802406A (ja)
WO (1) WO2009044491A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2448272C2 (ru) * 2010-05-20 2012-04-20 Мирослав Георгиевич Георгиевский Шестеренная гидромашина
CN101994691A (zh) * 2010-09-30 2011-03-30 张良 一种齿轮泵液体增压设备及其生产工艺和用途
US9028222B2 (en) 2011-08-26 2015-05-12 Hamilton Sundstrand Corporation Variable output pump
US8845313B2 (en) * 2011-11-18 2014-09-30 Caterpillar Inc. Oil pump for an engine
CN105526160A (zh) * 2014-10-16 2016-04-27 德昌电机(深圳)有限公司 齿轮泵
US11493035B2 (en) 2019-08-14 2022-11-08 Viking Pump, Inc. High pressure pumping system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3288450B2 (ja) * 1992-11-09 2002-06-04 カヤバ工業株式会社 ギヤポンプ
JP2006022948A (ja) * 2004-06-07 2006-01-26 Honda Motor Co Ltd 締結構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009044491A1 *

Also Published As

Publication number Publication date
WO2009044491A1 (ja) 2009-04-09
KR20100083157A (ko) 2010-07-21
CN101802406A (zh) 2010-08-11
US20100202913A1 (en) 2010-08-12
JPWO2009044491A1 (ja) 2011-02-03

Similar Documents

Publication Publication Date Title
EP2202410A1 (en) Gear pump
GB2138074A (en) A hydraulic pump
US10955056B2 (en) Apparatus for offshore work comprising a gear motor
US5567306A (en) Lubricant filtering system
CN102269179B (zh) 泵体耐干摩擦密封装置
JPWO2014207860A1 (ja) 液圧装置
MX2014003651A (es) Junta de cuello de rodillo de caja de laminado.
US4495856A (en) Rotary actuator
JP2009085267A (ja) 歯車装置
EP2789854B1 (en) Fluid-pressure apparatus
JP3613820B2 (ja) 歯車ポンプ又はモータ
JP2010159724A (ja) オイルポンプ
JP2007218128A (ja) ギヤポンプ
KR101795853B1 (ko) 실링장치 및 이를 구비한 공작기계
CN210152887U (zh) 一种转子间间隙可调整的转子泵
JP2011021619A (ja) ギヤカップリング
CN112065970A (zh) 使用润滑油润滑的角磨机齿轮箱的密封结构及角磨机
KR101785940B1 (ko) 자동변속기용 오일펌프
JPH10122161A (ja) ギアポンプ
CN216381832U (zh) 一种内啮合齿轮泵
EP4328460A1 (en) Sliding component
EP0081902A1 (en) A gear pump or motor
EP0864047A1 (en) Axial sealing
JP3161471U (ja) 歯車ポンプ
JP2007303421A (ja) ギアポンプ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100325

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20141110