WO2010035916A1 - Pompe possédant un trajet de dérivation - Google Patents

Pompe possédant un trajet de dérivation Download PDF

Info

Publication number
WO2010035916A1
WO2010035916A1 PCT/KR2008/005690 KR2008005690W WO2010035916A1 WO 2010035916 A1 WO2010035916 A1 WO 2010035916A1 KR 2008005690 W KR2008005690 W KR 2008005690W WO 2010035916 A1 WO2010035916 A1 WO 2010035916A1
Authority
WO
WIPO (PCT)
Prior art keywords
bypass
housing
hole
axis
fluid
Prior art date
Application number
PCT/KR2008/005690
Other languages
English (en)
Inventor
Jong-Gap Na
Original Assignee
Jong-Gap Na
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 Jong-Gap Na filed Critical Jong-Gap Na
Priority to PCT/KR2008/005690 priority Critical patent/WO2010035916A1/fr
Publication of WO2010035916A1 publication Critical patent/WO2010035916A1/fr

Links

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
    • 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
    • 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
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston 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
    • 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
    • F04C2/086—Carter

Definitions

  • the present invention relates to a pump having a bypass route, more particularly to a pump preventing fluid from escaping from the gap between a driving axis and an axis hole of housing.
  • a gear pump includes a pair of gears engaging each other to rotate in a housing having an inlet and an outlet so that water, oil, ink or the like (hereinafter 'fluid') is transferred through a space between an opening of teeth and an inner surface of the housing.
  • gear pump Since the gear pump is small and simple, it is widely used from oil pressure- equipments and vehicle control devices to household goods.
  • the conventional gear pump adopts a sealant having a multiple structure interposed between the driving axis and the housing.
  • a sealant having a multiple structure interposed between the driving axis and the housing.
  • such a configuration results in friction force on the driving axis due to the sealant to thereby reduce the rotation of the gear.
  • the sealant has a limitation that it deteriorates in long term operation. Disclosure of Invention Technical Problem
  • the present invention is designed to solve the above problems of the prior art, and therefore it is an object of the invention to provide a pump in which the fluid leaking from the driving axis and the axis hole of housing returns into the housing by a bypassing means for preventing the leakage of fluid.
  • the present invention provides a pump comprising: a housing having an inlet and an outlet through which a fluid flows in and out, respectively, and a axis hole through which a driving axis passes; a cover installed to an opening of the housing; a pair of gears engaging each other in the housing to rotate by the driving axis for transferring the fluid, the pair of gears dividing the space of the housing into an inflow room (R r ) on the side of the inlet and an outflow room (R D) on the side of the outlet; and a bypass route for returning the fluid leaking from the gap between the driving axis and the axis hole of the housing into the inflow room R 1 .
  • the bypass route comprises a bypass groove formed on the inner surface of the housing to extend from the axis hole to the inflow room (R 1 ).
  • a collection groove is formed along the edge of the axis hole on the inner surface of the housing, and the bypass groove extends from the collection groove to the inflow room (R 1 ).
  • a pump comprising: a housing having an inlet and an outlet through which a fluid flows in and out, respectively, and a axis hole through which a driving axis passes; a bypass outflow hole leading to the axis hole; a bypass inflow hole through which the fluid from the bypass outflow hole flows into the inflow room (R 1 ); and a bypass conduit connecting with the bypass outflow hole and the bypass inflow hole.
  • a collection groove is formed on the inner surface of a connection flange or the outer surface of the driving axis at the position corresponding to the bypass outflow hole.
  • the bypass outflow hole is formed on a connection flange of the housing.
  • the fluid is prevented from leaking from the driving axis and the axis hole of housing so that workplace keeps clean and maintenance is easy.
  • the fluid is circulated by a differential pressure according operation mechanism of the present gear pump, the leakage of fluid can be prevented with a simple structure and a low cost.
  • FIG. 1 shows an exploded perspective view of a pump according to a preferred embodiment of the present invention.
  • FIG. 2 shows a side sectional view of a pump according to a preferred embodiment of the present invention.
  • FIG. 3 is a partially sectional perspective view along the line III- III of FIG. 1.
  • FIG. 4 is a perspective view by removing a pair of gears in FIG. 3.
  • FIG. 5 is a perspective view of a pump according to another preferred embodiment of the present invention.
  • FIG. 6 is a side sectional view of a pump according to another preferred embodiment of the present invention.
  • FIG. 7 is a sectional view along the line VIII-VIII of FIG. 5.
  • FIG. 8 is a sectional view showing a bypass groove of a pump according to another preferred embodiment of the present invention. Best Mode for Carrying out the Invention
  • FIGs. 1 to 3 show a pump having a bypass route according to a preferred embodiment of the present invention.
  • FIG. 1 shows an exploded perspective view of a pump
  • FIG. 2 shows a side sectional view of a pump
  • FIG. 3 is a partially sectional perspective view along the line III-III of FIG. 1.
  • a pump of the present invention comprises a housing 10 having an inlet 11 and an outlet 12, and a pair of gears 20 and 30 installed in the housing 10 to rotate.
  • the pair of the gears 20 and 30 engages each other such that the teeth of the gears 20 and 30 contact the inner surface of the housing 10.
  • a driving axis 40 is connected to a central hole 20a of the driving gear 20.
  • the driving axis 40 extends outward through the axis hole 13 formed on the housing 10 and connects with a driving source such as a motor (not shown) to receive a driving force.
  • a driving source such as a motor (not shown) to receive a driving force.
  • the driving axis 40 and the driving gear 20 may be engaged by a key connection, fitting or the like.
  • Reference numeral 50 denotes a cover installed the front opening of the housing 10 and having a boss hole 51 into which one end of the driving axis is supported.
  • connection flange 14 having a thread on the inner surface thereof is provided around the axis hole 13 of the housing 10 and the fastening member 15 having a thread on the outer surface engages with the connection flange 14.
  • a sealing member 16 such as rubber and urethane is interposed between the connection flange 14 and the fastening member 15 to prevent the leakage of fluid through the axis hole 13 and the driving axis 40.
  • the driving axis 40 may insert into a hollow 15a of the fastening member 15.
  • the driven gear 30 engaged with the driving gear 20 is installed by a connection axis
  • connection axis 60 in the housing 10 such that both ends of the connection axis 60 are inserted into a boss hole 17 on the inner surface of the housing 10 and a boss hole 52 on the cover 50 to be thereby supported.
  • the inner space of the housing 10 is divided into two spaces, i.e., an inflow room R 1 on the side of the inlet 11 and an outflow room R D on the side of the outlet 12.
  • the fluid flows into the inflow room R 1 and then to the outflow room R D and the outlet 12.
  • the pressure P 1 of the inflow room R 1 is lower than the pressure P D of the outflow room R D due to the driving force of the pair of the gear 20 and 30. Also, the pressure P 1 of the inflow room R 1 is lower than the atmosphere.
  • the pump according to the present invention adopts a bypass route through which the fluid leaking from the driving axis 40 and the axis hole 13 of the housing 10 returns to the inflow room R 1 .
  • FIG. 4 shows an example of the bypass route.
  • FIG. 4 is a view by removing the pair of gears 20 and 30 of FIG. 3.
  • a collection groove 70 is formed along the edge of the axis hole 13 on the inner surface (see 10a of FIG. 4) (opposite to the cover) of the housing 10.
  • the collection groove 70 collects the fluid escaping from the gap between the axis hole 13 and the driving axis 40.
  • a bypass groove 72 is formed on the inner surface of the housing 10 to extend from the collection groove 70 to the inflow room R 1 .
  • the bypass groove 72 may have the same depth as the collection groove 70, but not limited thereto.
  • the bypass groove 72 may have a depth of 0.01 ⁇ 5.0mm and a width of 0.1 ⁇ 15mm.
  • bypass groove 72 is significantly wide, the air inflows from the outside through the gap between the axis hole 13 of the housing 10 and the driving axis 40 into the housing 10. Accordingly, the bypass groove 72 is properly sized depending on the capacity of gear pump, the amount of leakage fluid (the amount of bypass fluid)
  • the bypass route shall be various as an example is shown in FIG. 8.
  • the like reference numeral denotes the same member as the previous drawings.
  • a collection groove 70 is formed along the edge of the axis hole 13 on the inner surface 10a of the housing 10 so that a bypass groove 72' extends from the collection groove 70 to the inflow room (see R 1 of FIG. 3).
  • the bypass groove 72' is shaped to curve, preferably to spiral, and more preferably, the spiral direction is the same as rotational direction of the gear.
  • the gear 20 connected to the axis hole 13 rotates counterclockwise so that the bypass groove 72' extends counterclockwise.
  • the fluid is effectively prevented from leaking in the operation of the pump with the above configuration. That is, when the pair of gears 20 and 30 rotate due to the rotation of the driving axis 40 by a driving source (motor), the fluid in the inflow Ri room from the inlet 11 is transferred through the space between the teeth of the gears 20 and 30 and the inner surface of the housing 10 into the outflow room R D , and then flows out through the outlet 12.
  • FIGs. 5 to 7 show a pump having a bypass route according to still another embodiment of the present invention. That is, FIG. 5 is a perspective view of a pump, FIG. 6 is a side sectional view of a pump, and FIG. 7 is a sectional view along the line VIII-VIII of FIG. 5.
  • the like reference numeral denotes the same member as the previous drawings.
  • a bypass route returning the fluid from a driving axis 40' and an axis hole 13' into the inflow room R r comprises a bypass outflow hole 80 leading to the axis hole 13' of the housing 10, a bypass inflow hole 82 through which the fluid from the bypass outflow hole 80 flows into the inflow room R 1 , and a bypass conduit 84 connecting with the bypass outflow hole 80 and the bypass inflow hole 82.
  • the bypass outflow hole 80 is formed on the connection flange 14 of the housing 10 and a protrusion flange 86 is provided to facilitate connection of the bypass conduit 84. More preferably, a collection groove 70' is formed on the inner surface of the connection flange 14 or the outer surface of the driving axis 40' at the position corresponding to the bypass outflow hole 80 to collect the fluid escaping from the gap between the axis hole 13' and the driving axis 40'.
  • bypass inflow hole 82 is preferably formed to penetrate through the wall of inlet 11 leading to the inflow room R 1 , but not limited thereto. Alternatively, the bypass inflow hole may be formed on any place to connect to the inflow room R 1 .
  • the fluid leaking from the gap between the axis hole 13' of the housing 10 and the driving axis 40 stays in the collection groove 70'.
  • the pressure P r of the inflow room R r is lower than the pressure P D of the outflow room R D or atmosphere, the fluid in the collection groove 70 flows out from the bypass outflow hole 80 and into the bypass inflow hole 82 along the bypass conduit 84.
  • the fluid escaping from the gap between the axis hole 13 and the driving axis 40' returns to the outflow room R D so that the leakage of the fluid is prevented.
  • bypass conduit 84 may be applied to a motor pump, a turbine pump and a reciprocating pump as well as a gear pump.
  • the inflow room R 1 would be a space connecting the inlet with a relatively low pressure
  • the outflow room R D would be a space connecting the outlet with a relatively high pressure.
  • the driving axis 40' would be a rotational axis of motor, a turbine axis or reciprocating rod axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention porte sur une pompe qui comprend : un boîtier (10) présentant un orifice d'entrée (11) et un orifice de sortie (12) à travers lesquels un fluide s'écoule vers l'intérieur et vers l'extérieur, respectivement, et un trou d'axe (13) à travers lequel passe un axe d'entraînement (40) ; un couvercle (50) installé sur une ouverture du boîtier ; une paire d'engrenages (20), (30) s'engrenant mutuellement dans le boîtier de façon à ce que l'axe d'entraînement les fasse tourner pour transférer le fluide, la paire d'engrenages séparant l'espace du boîtier en une chambre d'admission (Rr) sur le côté de l'orifice d'entrée (11) et en une chambre de sortie (RD) sur le côté de l'orifice de sortie (12) ; et un trajet de dérivation pour faire retourner le fluide fuyant de l'espace entre l'axe d'entraînement et le trou d'axe du boîtier vers la chambre d'admission (R1).
PCT/KR2008/005690 2008-09-25 2008-09-25 Pompe possédant un trajet de dérivation WO2010035916A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2008/005690 WO2010035916A1 (fr) 2008-09-25 2008-09-25 Pompe possédant un trajet de dérivation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2008/005690 WO2010035916A1 (fr) 2008-09-25 2008-09-25 Pompe possédant un trajet de dérivation

Publications (1)

Publication Number Publication Date
WO2010035916A1 true WO2010035916A1 (fr) 2010-04-01

Family

ID=42059896

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/005690 WO2010035916A1 (fr) 2008-09-25 2008-09-25 Pompe possédant un trajet de dérivation

Country Status (1)

Country Link
WO (1) WO2010035916A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3183458B1 (fr) 2014-08-18 2018-08-01 GETRAG B.V. & Co. KG Dispositif d'alimentation en fluide pour boîte de vitesses d'un véhicule automobile
CN109083838A (zh) * 2018-07-31 2018-12-25 合肥集源穗意液压技术股份有限公司 一种高效回油、减压的前盖机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0811958B2 (ja) * 1986-09-26 1996-02-07 カヤバ工業株式会社 ギヤポンプ
JPH08159048A (ja) * 1994-11-30 1996-06-18 Shimadzu Corp 歯車ポンプ
JPH10274175A (ja) * 1997-02-03 1998-10-13 Denso Corp 回転式ポンプを備えた油圧回路及びこの油圧回路を用いたブレーキ装置
JPH11505910A (ja) * 1995-05-24 1999-05-25 マーク ポンプ システムズ テクストロン アクチエンゲゼルシャフト 粘性の異なる媒体を搬送するためのポンプのポンプ軸用の軸受装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0811958B2 (ja) * 1986-09-26 1996-02-07 カヤバ工業株式会社 ギヤポンプ
JPH08159048A (ja) * 1994-11-30 1996-06-18 Shimadzu Corp 歯車ポンプ
JPH11505910A (ja) * 1995-05-24 1999-05-25 マーク ポンプ システムズ テクストロン アクチエンゲゼルシャフト 粘性の異なる媒体を搬送するためのポンプのポンプ軸用の軸受装置
JPH10274175A (ja) * 1997-02-03 1998-10-13 Denso Corp 回転式ポンプを備えた油圧回路及びこの油圧回路を用いたブレーキ装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3183458B1 (fr) 2014-08-18 2018-08-01 GETRAG B.V. & Co. KG Dispositif d'alimentation en fluide pour boîte de vitesses d'un véhicule automobile
CN109083838A (zh) * 2018-07-31 2018-12-25 合肥集源穗意液压技术股份有限公司 一种高效回油、减压的前盖机构

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