WO2020165963A1 - Pompe à engrenages ou moteur - Google Patents

Pompe à engrenages ou moteur Download PDF

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Publication number
WO2020165963A1
WO2020165963A1 PCT/JP2019/005005 JP2019005005W WO2020165963A1 WO 2020165963 A1 WO2020165963 A1 WO 2020165963A1 JP 2019005005 W JP2019005005 W JP 2019005005W WO 2020165963 A1 WO2020165963 A1 WO 2020165963A1
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WO
WIPO (PCT)
Prior art keywords
gears
pair
region
gear
gear pump
Prior art date
Application number
PCT/JP2019/005005
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 PCT/JP2019/005005 priority Critical patent/WO2020165963A1/fr
Priority to JP2020571957A priority patent/JPWO2020165963A1/ja
Publication of WO2020165963A1 publication Critical patent/WO2020165963A1/fr
Priority to JP2023000686A priority patent/JP2023033379A/ja

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12Rotary-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
    • F04C2/14Rotary-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
    • F04C2/18Rotary-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

Definitions

  • the present invention relates to a gear pump or motor provided with an external gear pair inside a casing.
  • Such a gear pump or a hydraulic gear pump as a kind of motor fixes a pair of gears that are housed in mesh with each other in a hole formed in a body that constitutes a casing together with a cover and these gears.
  • the drive shaft and the driven shaft, the gears are provided in the low pressure region where the gears are gradually separated, and the suction passage for supplying the working oil as the hydraulic fluid to the holes is provided in the high pressure region where the gears are gradually meshed.
  • a discharge passage for discharging hydraulic oil from the hole is provided in the high pressure region where the gears are gradually meshed.
  • a pair of side plates is arranged on both side surfaces of the gear, and a pair of side plates is formed by introducing hydraulic oil in a high pressure region to the side of the side plate opposite to the gear to press the side plates toward the gear.
  • the gears are sandwiched by and the hydraulic oil is prevented from leaking from the high pressure region to the low pressure region.
  • the side plate is made of, for example, a lead bronze casting (LBC) or a sintered metal, and is capable of obtaining high slidability with the side surface of the gear.
  • a gear pump in which a side plate is arranged on only one side surface of a pair of gears has also been proposed.
  • one side surface of the pair of gears is in direct sliding contact with the body, and the other side surface is in sliding contact with the side plate. Then, by introducing hydraulic oil in a high-pressure region to the side of the side plate opposite to the gear to press the side plate toward the gear side, the side plate and the body sandwich the gear. reference).
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a gear pump or motor capable of shortening the processing time for the body and stabilizing the processing accuracy.
  • the invention according to claim 1 includes a pair of gears that mesh with each other and a body that includes a gear storage chamber that stores the pair of gears, and one side surface of the pair of gears is in sliding contact with the body, A region in which the other side surface of the pair of gears is a gear pump or a motor in sliding contact with a side plate disposed in the gear housing chamber, the side surface of the body facing the side plate opposite to the side plates of the pair of gears.
  • the side surfaces of the pair of gears are machined, and the low pressure seal area and the root seal area are machined, and the areas other than the low pressure seal area and the root seal area are machined. It is characterized by being separated from.
  • the body is a casting, and the pair of gears in the pair of gears are opposed to a side surface of the pair of gears.
  • the area separated from the side surface of the gear is a casting body.
  • the tooth tips of the pair of gears are separated from the body in the area other than the low-pressure seal area, so it is necessary to increase the processing accuracy of the area of the body that faces the tooth tips. Absent. Therefore, the gear pump can be manufactured easily and inexpensively.
  • the body is made of cast metal, and the region of the body facing the side faces of the pair of gears opposite to the side plates is separated from the side faces of the pair of gears by casting. Since the base material is used, the area requiring machining can be reduced, and the gear pump can be manufactured more easily and inexpensively.
  • FIG. 2 is a sectional view taken along the line XX in FIG.
  • FIG. 3 is a sectional view taken along the line YY in FIG.
  • FIG. 4 is an enlarged view of the vicinity of a hatched seal area in FIG. 3.
  • FIG. 1 is a vertical sectional view of a gear pump according to the present invention
  • FIG. 2 is a sectional view taken along line XX of the gear pump.
  • This gear pump is a hydraulic gear pump that uses hydraulic oil as hydraulic fluid and sends the hydraulic fluid by the action of a pair of gears 11 and 12.
  • the body 1 is in contact with a cover 2 via a gasket 17. And a pair of gears 11 and 12 that are meshed with each other and housed in a gear housing chamber 20 (see FIG. 2) formed in the body 1.
  • the gear 11 is fixed to a drive shaft 13 that rotates by driving a motor (not shown).
  • the gear 12 is fixed to the driven shaft 14.
  • One ends of the drive shaft 13 and the driven shaft 14 are rotatably supported by bearing holes formed in the body 1 via a bush 21, and the other ends of the drive shaft 13 and the driven shaft 14 are bearings formed in the cover 2.
  • the bush 21 is pivotally supported in the hole.
  • the gear 11 and the gear 12 rotate in the direction of the arrow shown in FIG. 2 while being in mesh with each other by the drive of the drive shaft 13.
  • the one side surface of the pair of gears 11 and 12 is in sliding contact with the bottom surface of the gear storage chamber 20 in the body 1.
  • the other side surface of the pair of gears 11 and 12 is in sliding contact with the side plate 16 that is in contact with the cover 2 via the gasket 17.
  • the working oil in the high pressure region is introduced by the action of the gasket 17 to the surface of the side plate 16 opposite to the pair of gears 11 and 12, and the side plate 16 is pressed against the side surfaces of the pair of gears 11 and 12.
  • the pair of gears 11 and 12 are sandwiched between the side plate 16 and the body 1 to prevent the hydraulic oil from leaking from the high pressure region to the low pressure region in the gear storage chamber 20.
  • the side plate 16 is made of, for example, a lead bronze casting or a sintered metal, and has a high slidability between the side faces of the pair of gears 11 and 12.
  • the hatched area in FIG. 2 is a sealing area required to prevent the hydraulic oil from leaking from the high pressure area to the low pressure area in the gear housing chamber 20.
  • a suction passage 18 for supplying hydraulic oil to the gear storage chamber 20 is formed on the low pressure region side where the teeth of the pair of gears 11 and 12 in the gear storage chamber 20 formed in the body 1 gradually separate. Further, a discharge passage 19 for discharging hydraulic oil from the gear storage chamber 20 is formed on the high pressure region side where the teeth of the pair of gears 11 and 12 in the gear storage chamber 20 formed in the body 1 gradually mesh. There is. Either or both of the suction passage 18 and the discharge passage 19 may be formed in the axial direction of the drive shaft 13 and the driven shaft 14 (direction perpendicular to the paper surface in FIG. 2).
  • FIG. 3 is a sectional view taken along the line YY in FIG. Further, FIG. 4 is an enlarged view of the vicinity of the seal area hatched in FIG.
  • the region around the pair of gears 11 and 12 on the suction passage 18 side is a low pressure region, and the region on the discharge passage 19 side is a high pressure region.
  • the low pressure area and the root areas of the gears 11 and 12 serve as a low pressure seal area E1 and a root seal area E2 for preventing hydraulic oil from flowing out from the high pressure area to the low pressure area.
  • the low-pressure seal area E1 and the root bottom seal area E2 are formed between the pair of gears 11 and 12 on one side surface between the side plate 16 and the other side surface between the body 1.
  • the areas corresponding to the low pressure seal area E1 and the root seal area E2 on the bottom surface of the gear housing chamber 20 formed in the body 1 are manufactured with high precision by machining by cutting. That is, the regions corresponding to the low-pressure seal region E1 and the tooth bottom seal region E2 in the body 1 are flatness, the squareness of the drive shaft 13 and the driven shaft 14 with respect to the bearing hole, and the tooth tips of the pair of gears 11 and 12. Management of corners and the like for avoiding interference is maintained with high accuracy.
  • the seal performance is not required in the area other than the areas corresponding to the low pressure seal area E1 and the root seal area E2 on the bottom surface of the gear housing chamber 20 formed in the body 1. Therefore, in the area corresponding to the low pressure seal area E1 and the tooth bottom seal area E2 on the bottom surface of the gear housing chamber 20 formed in the body 1, as shown in FIG. Are formed. This also applies to the side surface of the gear 12.
  • the surface of this space region 31 is the base material of the body 1 which is a mold.
  • the tooth tip portion of the gear 11 is in sliding contact with the surface of the gear housing chamber 20 in the body 1 in the low-pressure seal region E1, but in the other regions where the sealing property is not required.
  • a gap 32 is formed between the gear housing chamber 20 and the surface thereof. The same applies to the gear 12. This also makes it possible to reduce the machining time and the machining cost when machining the gear storage chamber 20, and to reduce the sliding resistance and the body weight by forming the gap 32. Is possible.
  • high-pressure hydraulic oil is introduced from the discharge passage 19, whereby rotational torque is extracted from the drive shaft 13 to drive an external load, and the constant-pressure hydraulic oil is sucked. It can also function as a gear motor having a motor function of discharging from the passage 18. That is, the gear pump in the above-described embodiment is also a gear motor.
  • the hydraulic fluid is used as the hydraulic fluid, but a hydraulic fluid other than the hydraulic fluid such as other liquids, fluids or semi-fluids may be used.

Abstract

Selon la présente invention, une région d'étanchéité à basse pression sur la surface inférieure d'une chambre de carter d'engrenage formée dans un corps (1) et une région correspondant à une région d'étanchéité de base de dents sont produites avec un degré élevé de précision par usinage par découpe. Une région d'espace séparée des surfaces latérales des engrenages (11), (12) est formée dans une région autre que la région d'étanchéité à basse pression sur la surface inférieure de la chambre de carter d'engrenage formée dans le corps (1) et la région correspondant à la région d'étanchéité de base de dents. La surface de la région d'espace est un matériau de base du corps (1), qui est un moule.
PCT/JP2019/005005 2019-02-13 2019-02-13 Pompe à engrenages ou moteur WO2020165963A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2019/005005 WO2020165963A1 (fr) 2019-02-13 2019-02-13 Pompe à engrenages ou moteur
JP2020571957A JPWO2020165963A1 (ja) 2019-02-13 2019-02-13 歯車ポンプまたはモータ
JP2023000686A JP2023033379A (ja) 2019-02-13 2023-01-05 歯車ポンプまたはモータ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/005005 WO2020165963A1 (fr) 2019-02-13 2019-02-13 Pompe à engrenages ou moteur

Publications (1)

Publication Number Publication Date
WO2020165963A1 true WO2020165963A1 (fr) 2020-08-20

Family

ID=72044435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/005005 WO2020165963A1 (fr) 2019-02-13 2019-02-13 Pompe à engrenages ou moteur

Country Status (2)

Country Link
JP (2) JPWO2020165963A1 (fr)
WO (1) WO2020165963A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504883B1 (fr) * 1966-08-15 1975-02-25
JPS5336703A (en) * 1976-07-13 1978-04-05 Akzo Nv Gear pumps reduced in power requirement
JP2000205150A (ja) * 1999-01-13 2000-07-25 Hitachi Ltd 容積形流体機械
JP2012092847A (ja) * 2012-01-13 2012-05-17 Hitachi Automotive Systems Ltd ギヤポンプ
WO2015181908A1 (fr) * 2014-05-28 2015-12-03 株式会社 島津製作所 Pompe ou moteur à engrenages

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504883B1 (fr) * 1966-08-15 1975-02-25
JPS5336703A (en) * 1976-07-13 1978-04-05 Akzo Nv Gear pumps reduced in power requirement
JP2000205150A (ja) * 1999-01-13 2000-07-25 Hitachi Ltd 容積形流体機械
JP2012092847A (ja) * 2012-01-13 2012-05-17 Hitachi Automotive Systems Ltd ギヤポンプ
WO2015181908A1 (fr) * 2014-05-28 2015-12-03 株式会社 島津製作所 Pompe ou moteur à engrenages

Also Published As

Publication number Publication date
JP2023033379A (ja) 2023-03-10
JPWO2020165963A1 (ja) 2021-09-30

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