WO2014199489A1 - Pompe ou moteur à engrenages - Google Patents

Pompe ou moteur à engrenages Download PDF

Info

Publication number
WO2014199489A1
WO2014199489A1 PCT/JP2013/066358 JP2013066358W WO2014199489A1 WO 2014199489 A1 WO2014199489 A1 WO 2014199489A1 JP 2013066358 W JP2013066358 W JP 2013066358W WO 2014199489 A1 WO2014199489 A1 WO 2014199489A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
side plate
gasket
gears
pressure
Prior art date
Application number
PCT/JP2013/066358
Other languages
English (en)
Japanese (ja)
Inventor
光平 松田
Original Assignee
株式会社 島津製作所
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 株式会社 島津製作所 filed Critical 株式会社 島津製作所
Priority to JP2015522346A priority Critical patent/JP6252802B2/ja
Priority to PCT/JP2013/066358 priority patent/WO2014199489A1/fr
Publication of WO2014199489A1 publication Critical patent/WO2014199489A1/fr

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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/088—Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof

Definitions

  • the present invention relates to a gear pump or a motor that is used in industrial vehicles and the like and sends out hydraulic fluid using the tooth spaces of at least a pair of gears that mesh with each other.
  • a movable side plate is provided near the side surface of these gears to reduce the amount of hydraulic fluid leaked to the side. It is known to cause the problem (see, for example, Patent Document 1).
  • the movable side plate in this type of gear pump is driven by the hydraulic pressure of the working fluid confined in the space defined by the teeth of the gears a2 and a3 and the sliding surface a6a of the side plate a6 (hereinafter referred to as the gear sliding portion S).
  • the teeth a2 and a3 receive force in the direction away from the wheel, but the seal part formed between the surface opposite to the sliding surface a6a of the side plate a6, that is, the non-sliding surface, and the inner peripheral surface of the casing (not shown)
  • a force opposite to this force that is, a force in a direction approaching the gears a2 and a3, is applied to the side plate a6 so as to maintain the pressure balance.
  • the hydraulic pressure of the hydraulic fluid confined between the teeth changes as follows with the passage of time.
  • the hydraulic pressure of the working fluid confined in the gear sliding portion S that is, the gear sliding portion closing pressure is equal to the suction pressure.
  • the pressure of the seal portion is equal to the discharge pressure, the side plate is pressed against the gear, and a large loss torque is generated.
  • the gear sliding portion closing pressure is higher than the discharge pressure because the hydraulic fluid is compressed between the teeth. Therefore, a clearance is generated between the side surfaces of the gears a2 and a3 and the side plate a6, and liquid leakage from the side surfaces of the gears is likely to occur.
  • the force pressing the side plate a6 against the gears a2 and a3 from the seal portion side that is, the non-sliding surface a6b side, separates the side plate a6 from the gears 2 and 3 from the gear sliding portion S.
  • the area of the portion into which the high-pressure hydraulic fluid in the seal portion is introduced is set so that the sliding surface a6a does not seize while being slightly larger than the pressing force.
  • the force pressing the side plate a6 against the gears a2 and a3 from the non-sliding surface a6b side is greater than the force pressing the side plate a6 away from the gears a2 and a3 from the gear sliding portion S. Since it is made slightly larger, the frictional force generated between the gears a2, a3 and the side plate a6 becomes larger, resulting in a problem that the loss torque becomes larger.
  • the present invention pays attention to the above points, and an object thereof is to realize a gear pump or motor having a configuration capable of achieving both suppression of hydraulic fluid leakage from the gap between the gear and the side plate and reduction of loss torque.
  • the gear pump or motor according to the present invention has a configuration as described below. That is, the gear pump or motor according to the present invention includes at least a pair of meshing gears, side plates adjacent to the side surfaces of the gears, a gear storage chamber for storing the gears, and a bearing into which a shaft for supporting the gears can be fitted.
  • a gear pump or motor comprising a casing having a hole and a gasket mounted in the side plate or a gasket mounting groove provided in the casing, wherein the thickness of the side plate is opposed to a position where the gear meshes with the side plate.
  • a through-hole penetrating in the vertical direction is provided, and a space defined by the side plate, the casing, and the gasket is formed at a location facing the through-hole of the gasket in the thickness direction of the gasket.
  • a pocket is provided.
  • the counterbore is connected to the end of the through hole on the gear side. The thing which provides the part is mentioned.
  • FIG. 3 is a sectional view taken along line AA in FIG. 2. Operation
  • the gear pump mainly includes a casing 1 having a gear housing chamber 11x therein, and an external gear that is housed and held in the gear housing chamber 11x of the casing 1 and meshes with each other.
  • a pair that is, a drive gear 2 and a driven gear 3, movable side plates 6 and 6 that are in contact with both side surfaces 2 a and 3 a of the gears 2 and 3, and shafts 4 and 5 that support the gears 2 and 3.
  • the side plate 6 in a state where it is mounted in the bush 7 disposed between the bearing holes 12a, 12b, 11a, 11b and the shafts 4, 5 and the gasket mounting grooves 6x, 6x provided in the side plates 6, 6. 6 and gaskets 8, 8 located between the casing 1.
  • the drive gear 2 and the driven gear 3 are well-known ones provided with a plurality of tooth bodies at predetermined intervals along the outer peripheral surface as shown in FIG.
  • the drive shaft 4 is integrally extended from the center of the drive gear 2 in the rotational axis direction
  • the driven shaft 5 is integrally extended from the driven gear 3 in the rotational axis direction.
  • the drive gear 2 and the drive shaft 4 may be configured separately, and the driven gear 3 and the driven shaft 5 may be configured separately.
  • the casing 1 is composed of a body 11 having the gear housing chamber 11x and a front cover 12 serving as a cover for closing the opening surface of the gear housing chamber 11x.
  • the body 11 is fitted with the substantially spectacle-shaped gear storage chamber 11x that stores the gear pair, that is, the drive gear 2 and the driven gear 3 in mesh, and the drive shaft 4 and the driven shaft 5 that communicate with the gear storage chamber 11x.
  • Possible bearing holes 11a and 11b are formed.
  • a bush 7 is fitted into the bearing hole 11a near the position where the drive gear 2 is to be inserted, and one end of the drive shaft 4 is fitted into the bush 7 in a rotatable state.
  • a bush 7 is also fitted in the bearing hole 11b near the position where the driven gear 3 is to be inserted, and one end of the driven shaft 5 is fitted in this bush 7 in a rotatable state.
  • the body 11 is provided with a suction port and a discharge port at positions facing the meshing portion of the drive gear 2 and the driven gear 3.
  • the front cover 12 is detachably mounted on the body 11 with bolts or the like, for example, and closes the front opening surface of the gear housing chamber 11x, and a bearing hole into which the drive shaft 4 and the driven shaft 5 can be respectively inserted. 12a and 12b are formed.
  • a bush 7 is fitted into the bearing hole 12a near the position where the drive gear 2 is to be inserted, and one end of the drive shaft 4 is inserted into the bush 7 so as to be rotatably supported.
  • a bush 7 is fitted into the bearing hole 12b near the position where the driven gear 3 is to be inserted, and one end of the driven shaft 5 is inserted into the bush 7 so as to be rotatably supported.
  • the movable side plate 6 is disposed at two locations so as to be in contact with both side surfaces 2 a and 3 a of the drive gear 2 and the driven gear 3, and each side surface of the drive gear 2 and the driven gear 3. It is for sealing 2a and 3a, respectively.
  • high-pressure hydraulic fluid is introduced from the discharge port into the high-pressure side region on the sliding surface 6 a side of the movable side plate 6, and the drive gear 2, the driven gear 3 and the movable side plates 6, 6 are connected to the casing 1.
  • a sealed portion 6b1 capable of introducing a high-pressure fluid is formed between the non-sliding surface 6b of the movable side plate 6 and the casing 1 in the housed state.
  • the side plate 6 is provided with a shaft hole 6c for allowing the drive shaft 4 or the driven shaft 5 to pass therethrough.
  • the portions facing the suction port and the discharge port are provided with cuts 6d and 6e with reduced thickness dimensions, respectively.
  • a penetrating through hole 6 x is provided in the side plate 6.
  • a counterbore 6y is provided at the end of the through hole 6x on the sliding surface 6a side, that is, on the side of the gears 2 and 3, and the counterbore 6y communicates with the through hole 6x.
  • the bush 7 is provided between the drive shaft 4 and the bearing holes 11 a and 12 a of the body 11 and the front cover 12, and the driven shaft 5. It is disposed between the body 11 and the bearing holes 11b, 12b of the front cover 12.
  • the gasket 8 is made of an elastic material. Further, as described above and as shown in FIGS. 1 to 3, the gasket 8 is mounted in a state of being attached to the gasket mounting protrusion 6g provided on the non-sliding surface 6b of the side plate 6.
  • the seal portion is crimped to the non-sliding surface 6b and the casing 1, and the seal portion is divided into a low pressure side Y, that is, a suction port side, and a high pressure side X, that is, a discharge port side.
  • a pocket for forming a space defined by the side plate 6, the casing 1, and the gasket 8 while penetrating in the thickness direction of the gasket 8 at a location facing the through hole of the side plate 6 of the gasket 8. 8x is provided.
  • the area of the pocket 8x when the gasket 8 is viewed from the direction in which the drive shaft 4 and the driven shaft 5 extend is caused by the pressure of the working fluid introduced into the pocket 8x, as will be described later.
  • the sliding force applied to the side plate 6 and the region defined by the gears 2, 3 and the sliding surface 6a of the side plate 6 and the counterbore portion 6y (hereinafter, the region and the counterbore portion 6y are combined).
  • the force applied to the side plate 6 due to the pressure of the working fluid confined in the portion S) is set so as to be substantially balanced.
  • the diameter d2 of the said pocket is set larger than the major axis d1 of the spot facing part 6y provided in the sliding face 6a of the said side plate 6.
  • the pocket 8x is also opened to the suction port side through the through hole 6x.
  • the gear pump P introduces high-pressure hydraulic fluid from the discharge port, thereby taking out rotational torque from the drive shaft to drive an external load and discharging low-pressure hydraulic fluid from the suction port. It goes without saying that it can also be made to function as a gear motor that performs the motor action.
  • the side plate 6 is provided with the through hole 6x penetrating in the thickness direction so as to open the gear sliding portion S to the non-sliding surface 6b side, and the gasket 8 is provided. Since a pocket 8x is formed at a location facing the through hole 6x in the thickness direction of the gasket 8 and forms a space defined by the side plate 6, the casing 1 and the gasket 8, Even when the hydraulic fluid in the gear sliding portion S is compressed, the hydraulic fluid is guided to the space inside the pocket 8x of the gasket 8 through the through hole 6x.
  • the leakage of the hydraulic fluid can be suppressed by maintaining the state in which the side plate 6 is in light contact with the gears 2 and 3 in balance with the force caused by the hydraulic pressure from the seal portion 6b1 side. Therefore, it is not necessary to strongly press the side plate 6 against the gears 2 and 3 in a state where the hydraulic pressure in the gear sliding portion S is equal to the suction pressure, and loss torque can be reduced.
  • the side plate 6 can be adjusted by adjusting the size of the counterbore 6y and the pocket 8x. It is possible to easily perform a design for balancing the forces caused by the hydraulic fluid pressure acting from the gear sliding portion S side, that is, the sliding surface 6a side, and the seal portion 6b1 side, that is, the non-sliding surface 6b side.
  • the gasket 8 is formed of an elastic material and the pocket 8x is formed by the gasket 8, when the hydraulic pressure of the working fluid confined in the pocket 8x fluctuates, It is possible to obtain a buffering action that elastically deforms and absorbs a change in hydraulic pressure of the working fluid.
  • the counterbore portion is provided in communication with the end portion on the gear side of the through hole of the side plate.
  • the diameter of the through hole is reduced as the distance from the gear decreases.
  • a space for releasing the working fluid confined in the space between the gear teeth and the sliding surface of the side plate by other means may be formed, and such a space may be omitted.
  • the present invention is not limited to the case where only a pair of gears are provided in the casing, but may be applied to a gear pump or motor in which two or more pairs of gears are provided in the casing.
  • a gear pump or motor equipped with a gasket mounted in a gasket mounting groove, a gear pump or motor configured to achieve both suppression of hydraulic fluid leakage from the gap between the gear and the side plate and reduction of loss torque is realized. it can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

　Pompe ou moteur à engrenages, comportant une paire d'engrenages en prise, une plaque latérale adjacente aux surfaces latérales des engrenages, un carter muni d'une chambre de logement d'engrenages servant à recevoir les engrenages et de trous de paliers dans lesquels peuvent être ajustés des arbres destinés à porter les engrenages, et un joint monté dans une rainure de montage de joint réalisée sur la plaque latérale ou le carter, une configuration employée étant caractérisée en ce qu'un trou débouchant passant à travers la plaque latérale dans le sens de l'épaisseur est pratiqué à un emplacement sur la plaque latérale situé à l'opposé de l'emplacement où la paire d'engrenages est en prise, et en ce qu'une poche passant à travers le joint dans le sens de l'épaisseur et formant un espace délimité par la plaque latérale, le carter et le joint est réalisée à un emplacement du joint qui fait face au trou débouchant.
PCT/JP2013/066358 2013-06-13 2013-06-13 Pompe ou moteur à engrenages WO2014199489A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2015522346A JP6252802B2 (ja) 2013-06-13 2013-06-13 歯車ポンプ又はモータ
PCT/JP2013/066358 WO2014199489A1 (fr) 2013-06-13 2013-06-13 Pompe ou moteur à engrenages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/066358 WO2014199489A1 (fr) 2013-06-13 2013-06-13 Pompe ou moteur à engrenages

Publications (1)

Publication Number Publication Date
WO2014199489A1 true WO2014199489A1 (fr) 2014-12-18

Family

ID=52021819

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/066358 WO2014199489A1 (fr) 2013-06-13 2013-06-13 Pompe ou moteur à engrenages

Country Status (2)

Country Link
JP (1) JP6252802B2 (fr)
WO (1) WO2014199489A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016180319A1 (fr) * 2015-05-11 2016-11-17 Byd Company Limited Chariot élévateur à fourche, pompe à engrenages internes et composant de compensation axial associé
CN108799101A (zh) * 2018-06-15 2018-11-13 哈尔滨理工大学 一种外啮合齿轮泵用新型浮动轴套
JPWO2019073602A1 (ja) * 2017-10-13 2020-04-02 株式会社島津製作所 歯車ポンプ又はモータ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838562Y1 (fr) * 1970-12-02 1973-11-14
JPS5635582U (fr) * 1979-08-27 1981-04-06
JPS6114490A (ja) * 1984-06-21 1986-01-22 ダウテイ　ハイドロウリツク　ユニツツ　リミテツド 回転容積型流体圧力機

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5424322Y2 (fr) * 1973-09-20 1979-08-17
FR2564931B1 (fr) * 1984-05-22 1986-12-05 Malfit Jean Generateur recepteur hydraulique a haute pression pour la transmission de puissance
CN85107186B (zh) * 1985-09-29 1988-11-16 程安强 非对称型径向浮动式齿轮泵、齿轮马达
JPH03213685A (ja) * 1990-01-19 1991-09-19 Hitachi Ltd 多連式歯車ポンプ
JP2001165063A (ja) * 1999-12-13 2001-06-19 Shimadzu Corp 歯車ポンプまたはモータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838562Y1 (fr) * 1970-12-02 1973-11-14
JPS5635582U (fr) * 1979-08-27 1981-04-06
JPS6114490A (ja) * 1984-06-21 1986-01-22 ダウテイ　ハイドロウリツク　ユニツツ　リミテツド 回転容積型流体圧力機

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016180319A1 (fr) * 2015-05-11 2016-11-17 Byd Company Limited Chariot élévateur à fourche, pompe à engrenages internes et composant de compensation axial associé
JPWO2019073602A1 (ja) * 2017-10-13 2020-04-02 株式会社島津製作所 歯車ポンプ又はモータ
CN108799101A (zh) * 2018-06-15 2018-11-13 哈尔滨理工大学 一种外啮合齿轮泵用新型浮动轴套

Also Published As

Publication number Publication date
JP6252802B2 (ja) 2017-12-27
JPWO2014199489A1 (ja) 2017-02-23

Similar Documents

Publication Publication Date Title
JP6252802B2 (ja) 歯車ポンプ又はモータ
US3838952A (en) Gear pump and motor having a sealed lock for preventing hydraulic oil from leaking between the ends of the teeth of the gears
JP3189138U (ja) 液圧装置
JP6119748B2 (ja) 歯車ポンプ又はモータ
TWI586892B (zh) Gear pump or motor
JP4856137B2 (ja) ギヤポンプ
JPH11303768A (ja) ギヤポンプ
JPH10122160A (ja) ギアポンプ
JP2013064336A (ja) 歯車ポンプ又はモータ
JP3612393B2 (ja) ギアポンプ
WO2016181520A1 (fr) Pompe à engrenages
JP2009150253A (ja) 外接型ギヤポンプ
WO2014136186A1 (fr) Moteur ou pompe à engrenages
WO2014141377A1 (fr) Pompe ou moteur à roue dentée
JP3652133B2 (ja) ギヤポンプ
JP2009002316A (ja) 歯車ポンプ又はモータ
JP2014109249A (ja) 歯車ポンプまたはモータ
JP4061847B2 (ja) ギヤポンプ
WO2019073602A1 (fr) Pompe à engrenages ou moteur
JP3154209U (ja) 歯車ポンプ
JP2794918B2 (ja) 歯車ポンプ
WO2020165963A1 (fr) Pompe à engrenages ou moteur
JP2019196760A (ja) ギヤポンプ
JP2012077686A (ja) 歯車ポンプ又はモータ
JP2021085331A (ja) 回転式ポンプ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13886670

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2015522346

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13886670

Country of ref document: EP

Kind code of ref document: A1