CN107939671A - A kind of tandem low pulse crescent gear pump with error angle - Google Patents

A kind of tandem low pulse crescent gear pump with error angle Download PDF

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Publication number
CN107939671A
CN107939671A CN201710980297.6A CN201710980297A CN107939671A CN 107939671 A CN107939671 A CN 107939671A CN 201710980297 A CN201710980297 A CN 201710980297A CN 107939671 A CN107939671 A CN 107939671A
Authority
CN
China
Prior art keywords
gear
shaft
babinet
linkage
axis
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.)
Pending
Application number
CN201710980297.6A
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Chinese (zh)
Inventor
周华
杜睿龙
谢安桓
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Zhejiang University ZJU
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Zhejiang University ZJU
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 Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN201710980297.6A priority Critical patent/CN107939671A/en
Publication of CN107939671A publication Critical patent/CN107939671A/en
Pending legal-status Critical Current

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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
    • F04C2/10Rotary-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
    • F04C2/101Rotary-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 with a crescent-shaped filler element, located between the inner and outer intermeshing members
    • 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
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • 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
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023Axial sealings for working fluid
    • F04C15/0026Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • 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
    • F04C2270/00Control; Monitoring or safety arrangements
    • F04C2270/14Pulsations
    • F04C2270/145Controlled or regulated

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

The invention discloses a kind of tandem low pulse crescent gear pump with error angle.The connection of front gear babinet is installed between protecgulum and connected body, the connection of backgear babinet is installed between rear cover and connected body, front gear babinet is identical with backgear body structure, including front axle tray, housing, rear axle tray, gear shaft and linkage gear axis are coaxially connected, power is input to gear shaft, drives linkage gear axis to carry out moment of torsion transmission by gear shaft;Gear shaft and linkage gear axis are the multidiameter structure being mainly made of preceding shaft part, rear shaft part and gear segment, the gear segment of gear shaft and linkage gear axis is set in front gear babinet and rear gear box body, and the gear segment of gear shaft and linkage gear axis is installed in gear housing by moon teething ring component.The present invention can be so that exit flow pulsation reduction by more than 65%, realizes the purpose for reducing gear pump outlet flow pulsation.

Description

A kind of tandem low pulse crescent gear pump with error angle
Technical field
The present invention relates to a kind of crescent gear pump, more particularly, to being nibbled in a kind of tandem low pulse with error angle Close gear pump.
Background technology
Crescent gear pump is due to the advantages that its is compact-sized, noise level is low, outlet pressure pulsation is small, in injection molding machine It is used widely in the fields such as tool, ocean machinery and precision machine tool.But the ratio with " intelligence manufacture " in traditional industry Weight is increasing, and the requirement for control accuracies such as precision machine tools is higher and higher, and therefore, crescent gear pump outlet pulsation is carried The requirement of higher is gone out.It is required that the rate of discharge of crescent gear pump is more steady, pulsating quantity smaller, so as to fulfill higher precision Control.
Meanwhile in Hydraulic Elements, noise is broadly divided into flow noise and construct noise two parts.Crescent gear pump Flow noise is caused mainly due to the rate of discharge pulsation of pump, is pulsed by the rate of discharge for further reducing pump, Ke Yijin One step reduces the noise level of pump, also complies with the social development theme of current " green manufacturing ".
Existing reduction crescent gear pump rate of discharge pulsation mainly has two methods, and one kind is to internal gear pair Design parameter optimize, including the number of teeth, modulus, modification coefficient etc.;Another kind be to the hole slot structure on floating side plate into Row optimization.But both approaches can all increase the complexity of work flow, the stability of processing technology is reduced;Also, this Two methods are for reducing rate of discharge pulsation effect and unobvious.Therefore, there is an urgent need for a kind of simple in structure, work flow is not increased Complexity, do not reduce the stability of processing technology, and the inside engaged gear pump configuration of flow pulsation can be greatly reduced.
The content of the invention
For the current shortcoming for reducing crescent gear pump rate of discharge pulse methods, it is an object of the invention to carry A kind of tandem low pulse crescent gear pump with error angle has been supplied, the rate of discharge of crescent gear pump can be greatly reduced Pulsation.
The technical solution adopted by the present invention is:
The present invention includes protecgulum, connected body, rear cover, front gear babinet and backgear babinet, the connection installation of front gear babinet Between protecgulum and connected body, the connection of backgear babinet is installed between rear cover and connected body, protecgulum, front gear babinet, connection Body, backgear babinet and rear cover connect fixation by bolt assembly;Front gear babinet is identical with backgear body structure, includes Front axle tray, housing, rear axle tray, front axle tray, rear axle tray are respectively placed in the both sides of housing, gear shaft and linkage tooth Wheel shaft is separately mounted in front gear babinet and backgear babinet, and gear shaft and linkage gear axis are coaxially connected, is moved Power is input to gear shaft, drives linkage gear axis to carry out moment of torsion transmission by gear shaft.
Gear shaft and linkage gear axis are the multi-diameter shaft knot being mainly made of preceding shaft part, rear shaft part and gear segment Structure, gear segment is between preceding shaft part and rear shaft part and diameter is maximum, the gear segment difference of gear shaft and linkage gear axis It is sleeved in front gear babinet and rear gear box body, shaft part passes through the end after the front axle tray of front gear babinet before gear shaft Portion is pierced by protecgulum and is connected with external power supply, after gear shaft shaft part through front gear babinet rear axle tray after end and Shaft part is coaxially connected through spline coupling through the end after the front axle tray of backgear babinet before linkage gear axis, linkage gear Shaft part is extend into rear cover after passing through the rear axle tray of backgear babinet after axis;The gear segment of gear shaft and linkage gear axis It is installed on by moon teething ring component in respective gear housing.
The moon teething ring component includes external toothing, moon block teeth, floating side plate and crescent moon pin, external toothing and is placed in gear-box In vivo, the gear segment of gear shaft or linkage gear axis is sleeved in external toothing, the external tooth of gear segment and external toothing it is interior Tooth is meshed drive connection, and has gap between gear segment and external toothing, pacifies in the gap between gear segment and external toothing Fill moon block teeth, the moon block teeth along the section of gear segment axial direction be in crescent, the both ends end face of gear segment and external toothing is respectively and front axle Floating side plate is equipped between tray, rear axle tray, moon block teeth both ends are axially connected through crescent moon pin and floating side plate, crescent moon pin It is inserted into the inner wall of front axle tray, rear axle tray.While moon block teeth, floating side plate play certain sealing function.
The gear shaft is fixedly and coaxially connected with linkage gear axis by spline coupling, gear shaft and connection The tooth of movable gear shaft gear segment is axially misaligned along gear segment in the arrangement of circumferencial direction, and there are error angle
Axle envelope is equipped with before the gear shaft between shaft part and protecgulum.
The gear shaft and the preceding shaft part of linkage gear axis are connected to one by sliding bearing and front axle tray Rise, the rear shaft part of gear shaft and linkage gear axis is linked together by sliding bearing and rear axle tray.
Housing in the front gear babinet and backgear babinet is provided with two ports, respectively as inlet port and oil extraction Mouthful, oil suction and oil extraction for pump.
There are an error angle for two groups of internal gear pairs so that there are a phase difference for flow caused by gear pair. When the dephased flow interflow superposition of two strands of tools, by reasonable adjustment phase place angle, exit flow pulsation can be caused to reduce More than 65%, realize the purpose for reducing gear pump outlet flow pulsation.
The beneficial effects of the invention are as follows:
The present invention has the inside engaged gear auxiliary structure of error angle by two groups in circumferencial direction, and two groups of teeth wheel auxiliary structure is pressed Same rotational speed engagement rotation, the flow of generation have identical pulsation rule and pulsation period.
Also, the present invention can rationally adjust error angle, so that the flow that two groups of teeth wheel set produces is being collaborated When, peaks and troughs superposition, so as to achieve the purpose that the pulsation of crescent gear pump rate of discharge is greatly lowered.
Brief description of the drawings
Fig. 1 is the structure sectional view of crescent gear pump of the present invention.
Fig. 2 is the front and rear gear pair error angle schematic diagram of crescent gear pump of the present invention.
Fig. 3 is the structural section schematic diagram of crescent gear pump of the present invention.
Fig. 4 is the flow pulsation schematic diagram that two groups of teeth wheel set of the present invention produces respectively.
Fig. 5 is that the present invention reaches the design sketch for reducing rate of discharge pulsation purpose by adjusting error angle.
In figure:1. month block teeth, 2. gear shafts, 3. axle envelopes, 4. protecgulums, 5. front axle trays, 6. housings, 7. front ring gears, 8. rear axle tray, 9. sliding bearings, 10. connected bodies, 11. spline couplings, 12. linkage gear axis, gear ring after 13., after 14. Lid, 15. bolt assemblies, 16. floating side plates, 17. crescent moon pins.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention include moon block teeth 1, gear shaft 2, axle envelope 3, protecgulum 4, front axle tray 5, housing 6, Front ring gear 7, rear axle tray 8, sliding bearing 9, connected body 10, spline coupling 11, linkage gear axis 12, rear gear ring 13, rear cover 14 and bolt assembly 15.
Front gear babinet is identical with backgear body structure, including front axle tray 5, housing 6, rear axle tray 8, fore bearing Disk 5, rear axle tray 8 are respectively placed in the front and rear sides of housing 6, protecgulum 4, connected body 10, rear cover 14 and front and rear gear housing Front axle tray 5, housing 6, rear axle tray 8 are installed together by the connection of bolt assembly 15.
Gear shaft 2 and linkage gear axis 12 are separately mounted in front gear babinet and backgear babinet, and are driven Gear shaft 2 and linkage gear axis 12 are coaxially connected, and power is input to gear shaft 2, and linkage gear is driven by gear shaft 2 Axis 12 carries out moment of torsion transmission.
As shown in Figure 1, gear shaft 2 and linkage gear axis 12 are mainly by preceding shaft part, rear shaft part and gear segment structure Into multidiameter structure, gear segment is between preceding shaft part and rear shaft part and diameter is maximum, gear shaft 2 and linkage gear axis 12 gear segment is set in front gear babinet and rear gear box body, and shaft part passes through front gear babinet before gear shaft 2 Front axle tray 5 after end be pierced by protecgulum 4 and be connected with external power supply, protecgulum 4 is equipped with allow gear shaft 2 to be pierced by logical Hole, shaft part is passed through through shaft part before the end after the rear axle tray 8 of front gear babinet and linkage gear axis 12 after gear shaft 2 End after the front axle tray 5 of backgear babinet is coaxially connected through spline coupling 11, after shaft part passes through after linkage gear axis 12 It is extend into after the rear axle tray 8 of gear housing in rear cover 14, rear cover 14, which is closed, does not open hole.
The front axle of axle envelope 3, gear shaft 2 and linkage gear axis 12 is equipped with before gear shaft 2 between shaft part and protecgulum 4 Duan Jun is linked together by sliding bearing 9 and the front axle tray 5 of respective gear housing, gear shaft 2 and linkage gear axis 12 rear shaft part is linked together by sliding bearing 9 and the rear axle tray 8 of respective gear housing.
As shown in Fig. 2, the gear segment of gear shaft 2 and linkage gear axis 12 is installed on respectively by moon teething ring component From gear housing in.The moon, teething ring component included external toothing, moon block teeth 12, floating side plate 16 and crescent moon pin 17, and external toothing is put In in gear housing, the gear segment of gear shaft 2 or linkage gear axis 12 is sleeved in external toothing, the external tooth of gear segment and The internal tooth of external toothing is meshed drive connection, and has gap, the reference diameter of gear segment between gear segment and external toothing Less than the reference diameter of external toothing, moon block teeth 12 are installed in the gap between gear segment and external toothing, the moon, block teeth 12 were along gear The axial section of section be in crescent, and the both ends end face of gear segment and external toothing is equal between front axle tray 5, rear axle tray 8 respectively Equipped with floating side plate 16, the moon block teeth 12 both ends connected through crescent moon pin 17 and floating side plate 16 are axial, crescent moon pin 17 is parallel to tooth The axial direction of section is taken turns, crescent moon pin 17 is inserted into the inner wall of front axle tray 5, rear axle tray 8.While moon block teeth 12, floating side plate 16 Play certain sealing function.
As shown in figure 3, the housing 6 in front gear babinet and backgear babinet is provided with two ports, respectively as oil suction Mouth and oil discharge outlet, oil suction and oil extraction for pump.The housing 6 of front gear babinet and 6 inlet port of housing of backgear babinet connect Same oil sources is connected to, the housing 6 of front gear babinet and 6 oil discharge outlet of housing of backgear babinet are also connected to carry out in same oil circuit Collaborate output flow.
In specific implementation, the external toothing of installation is front ring gear 7 in front gear box body, and the gear segment of gear shaft 2 is set with In front ring gear 7;The external toothing of installation is rear gear ring 13 in rear gear box body, and the gear segment of linkage gear axis 12 is sleeved on rear tooth In circle 13.
Gear shaft 2 is fixedly and coaxially connected with linkage gear axis 12 by spline coupling 11, gear shaft 2 and connection The tooth of 12 gear segment of movable gear shaft is axially misaligned along gear segment in the arrangement of circumferencial direction, and there are error angle
The specific implementation course of work of the present invention is as follows:
During work, the gear segment of gear shaft 2 or linkage gear axis 12 is rotated around its central axis, the moon block teeth 12 due to The connection function of crescent moon pin 17 and floating side plate 16 keeps fixing, and maximum gauge of the moon block teeth 12 in section is external toothing The difference of the tip diameter of tip diameter and gear segment, gear segment, which rotates, drives external toothing to be rotated around its central axis.
Due to two groups of internal messings between gear shaft 2 and front ring gear 7, between linkage gear axis 12 and rear gear ring 13 Front and rear gear pair is with identical rotational speed, therefore flow caused by two groups of teeth wheel set has identical pulsation rule and pulsation Cycle, as shown in Figure 4.The flow that gear pair produces is into pulses, and peaks and troughs is into periodic distribution.Due to front and rear gear It is secondary that in circumferencial direction, there are an error angleTherefore there are a fixed phase difference for the flow that two groups of teeth wheel set produces.
The flow that two groups of teeth wheel set produces will collaborate, by rationally designing error angleIt can cause one group of gear by-product The trough for the flow that the wave crest of raw flow is produced just at another group of gear pair, by flow summation process, wave crest and ripple Paddy is superimposed, so as to fulfill the purpose of pump discharge flow pulsation is greatly lowered.As shown in figure 5, to reach by adjusting error angle The design sketch of rate of discharge pulsation purpose is reduced, the dotted line in figure represents the front and rear gear that implementation process is arranged after optimal error angle It is in the rate of discharge of oil discharge outlet, the optimal error angle of specific implementation after pair superpositionSolid line in figure represents real During applying with do not arrange the front and rear gear pair after error angle superposition after oil discharge outlet rate of discharge.
As can be seen here, it is seen then that optimization design error angleAfterwards, the amplitude of rate of discharge pulsation reduces more than 65%.
Thus illustrate that the present invention can effectively reduce the pulsation of crescent gear pump rate of discharge, there is it to protrude significant skill Art effect.

Claims (6)

  1. A kind of 1. tandem low pulse crescent gear pump with error angle, it is characterised in that:Including protecgulum (4), connected body (10), rear cover (14), front gear babinet and backgear babinet, the connection of front gear babinet are installed on protecgulum (4) and connected body (10) Between, the connection of backgear babinet is installed between rear cover (14) and connected body (10), protecgulum (4), front gear babinet, connected body (10), backgear babinet and rear cover (14) are connected by bolt assembly (15) fixes;Front gear babinet and backgear body structure It is identical, shell is respectively placed in including front axle tray (5), housing (6), rear axle tray (8), front axle tray (5) and rear axle tray (8) The both sides of body (6), gear shaft (2) and linkage gear axis (12) are separately mounted in front gear babinet and backgear babinet, And gear shaft (2) and linkage gear axis (12) are coaxially connected, and power is input to gear shaft (2), by drive gear Axis (2) drives linkage gear axis (12) to carry out moment of torsion transmission;
    Gear shaft (2) and linkage gear axis (12) are the multi-diameter shaft being mainly made of preceding shaft part, rear shaft part and gear segment Structure, gear segment is between preceding shaft part and rear shaft part and diameter is maximum, the tooth of gear shaft (2) and linkage gear axis (12) Wheel section is set in front gear babinet and rear gear box body, before shaft part passes through front gear babinet before gear shaft (2) End after bearing disk (5) is pierced by protecgulum (4) and is connected with external power supply, and shaft part passes through front gear box to gear shaft (2) afterwards After shaft part passes through the front axle tray (5) of backgear babinet before end and linkage gear axis (12) after the rear axle tray (8) of body End is coaxially connected through spline coupling (11), linkage gear axis (12) afterwards shaft part pass through backgear babinet rear axle tray (8) After extend into rear cover (14);The gear segment of gear shaft (2) and linkage gear axis (12) is pacified by moon teething ring component Loaded in respective gear housing.
  2. A kind of 2. tandem low pulse crescent gear pump with error angle according to claim 1, it is characterised in that: The moon teething ring component includes external toothing, moon block teeth (12), floating side plate (16) and crescent moon pin (17), and external toothing is placed in tooth In roller box body, the gear segment of gear shaft (2) or linkage gear axis (12) is sleeved in external toothing, the external tooth of gear segment and The internal tooth of external toothing is meshed drive connection, and has gap between gear segment and external toothing, between gear segment and external toothing Gap in moon block teeth (12) are installed, moon block teeth (12) are in crescent along the section of gear segment axial direction, gear segment and external toothing Both ends end face is equipped with floating side plate (16) between front axle tray (5), rear axle tray (8) respectively, and the moon block teeth (12) both ends are equal Axially connect through crescent moon pin (17) and floating side plate (16), crescent moon pin (17) is inserted into front axle tray (5), rear axle tray (8) In inner wall.
  3. A kind of 3. tandem low pulse crescent gear pump with error angle according to claim 2, it is characterised in that: The gear shaft (2) is fixedly and coaxially connected with linkage gear axis (12) by spline coupling (11), gear shaft (2) axially misaligned along gear segment in the arrangement of circumference with the tooth of linkage gear axis (12) gear segment, there are error angle
  4. A kind of 4. tandem low pulse crescent gear pump with error angle according to claim 1, it is characterised in that: Axle envelope (3) is equipped with before the gear shaft (2) between shaft part and protecgulum (4).
  5. A kind of 5. tandem low pulse crescent gear pump with error angle according to claim 1, it is characterised in that: The gear shaft (2) and the preceding shaft part of linkage gear axis (12) are connected by sliding bearing (9) with front axle tray (5) Together, the rear shaft part of gear shaft (2) and linkage gear axis (12) is connected by sliding bearing (9) and rear axle tray (8) It is connected together.
  6. A kind of 6. tandem low pulse crescent gear pump with error angle according to claim 1, it is characterised in that: Housing (6) in the front gear babinet and backgear babinet is provided with two ports, respectively as inlet port and oil discharge outlet, uses In the oil suction and oil extraction of pump.
CN201710980297.6A 2017-10-19 2017-10-19 A kind of tandem low pulse crescent gear pump with error angle Pending CN107939671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710980297.6A CN107939671A (en) 2017-10-19 2017-10-19 A kind of tandem low pulse crescent gear pump with error angle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710980297.6A CN107939671A (en) 2017-10-19 2017-10-19 A kind of tandem low pulse crescent gear pump with error angle

Publications (1)

Publication Number Publication Date
CN107939671A true CN107939671A (en) 2018-04-20

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CN201710980297.6A Pending CN107939671A (en) 2017-10-19 2017-10-19 A kind of tandem low pulse crescent gear pump with error angle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111911408A (en) * 2020-08-31 2020-11-10 安徽江淮汽车集团股份有限公司 Internal gear pump
CN114810577A (en) * 2022-04-20 2022-07-29 中国北方车辆研究所 Oil supplementing device and closed system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360325A (en) * 1993-09-30 1994-11-01 The United States Of America As Represented By The Secretary Of The Navy Gear pump with reduced fluid-borne noise
CN201162670Y (en) * 2008-01-11 2008-12-10 詹建程 Dual idler gear pump
CN201209552Y (en) * 2008-06-12 2009-03-18 宁波高新协力机电液有限公司 Low flow pulsation internal gear pump
CN102782326A (en) * 2009-10-01 2012-11-14 罗伯特·博世有限公司 Axial sealing element for an internal gear pump
CN203130492U (en) * 2013-03-06 2013-08-14 绍兴泰格机电技术有限公司 Double gear pump
CN104329250A (en) * 2014-09-03 2015-02-04 浙江大学 Low flow pulsating bidirectional gear pump
CN204961290U (en) * 2015-09-02 2016-01-13 安徽合力股份有限公司 Interior external toothing trigeminy combination gear type wheel cylinder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360325A (en) * 1993-09-30 1994-11-01 The United States Of America As Represented By The Secretary Of The Navy Gear pump with reduced fluid-borne noise
CN201162670Y (en) * 2008-01-11 2008-12-10 詹建程 Dual idler gear pump
CN201209552Y (en) * 2008-06-12 2009-03-18 宁波高新协力机电液有限公司 Low flow pulsation internal gear pump
CN102782326A (en) * 2009-10-01 2012-11-14 罗伯特·博世有限公司 Axial sealing element for an internal gear pump
CN203130492U (en) * 2013-03-06 2013-08-14 绍兴泰格机电技术有限公司 Double gear pump
CN104329250A (en) * 2014-09-03 2015-02-04 浙江大学 Low flow pulsating bidirectional gear pump
CN204961290U (en) * 2015-09-02 2016-01-13 安徽合力股份有限公司 Interior external toothing trigeminy combination gear type wheel cylinder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111911408A (en) * 2020-08-31 2020-11-10 安徽江淮汽车集团股份有限公司 Internal gear pump
CN114810577A (en) * 2022-04-20 2022-07-29 中国北方车辆研究所 Oil supplementing device and closed system
CN114810577B (en) * 2022-04-20 2023-10-31 中国北方车辆研究所 Oil supplementing device and closed system

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Application publication date: 20180420

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