CN101608617B - Internally-geared low-pulsation gear pump - Google Patents

Internally-geared low-pulsation gear pump Download PDF

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Publication number
CN101608617B
CN101608617B CN2008101317206A CN200810131720A CN101608617B CN 101608617 B CN101608617 B CN 101608617B CN 2008101317206 A CN2008101317206 A CN 2008101317206A CN 200810131720 A CN200810131720 A CN 200810131720A CN 101608617 B CN101608617 B CN 101608617B
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CN
China
Prior art keywords
gear
pulsation
oil
cover
flow
Prior art date
Application number
CN2008101317206A
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Chinese (zh)
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CN101608617A (en
Inventor
张军
Original Assignee
安徽理工大学
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Priority to CN2008101317206A priority Critical patent/CN101608617B/en
Publication of CN101608617A publication Critical patent/CN101608617A/en
Application granted granted Critical
Publication of CN101608617B publication Critical patent/CN101608617B/en

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Abstract

The invention discloses an internally-geared low-pulsation gear pump. A midbody, a front end cover and a rear end cover are fixed by blots; the number of pinions is a variable from 2 to 4, and the following three pinions are used as examples for explanation. An electronic motor drives a transmission gear to rotate by a transmission shaft; the transmission gear is engaged with an external tooth profile of an internal gear and drives the internal gear to rotate; the internal tooth profile of the internal gear is engaged with the three pinions so as to generate volumetrical change; oil liquid enters three oil-absorbing cavities of the internal gear by an oil inlet, a flow-distributing shaft and a retainer frame, is led in an oil discharge cavity by the gear teeth of the pinions and enters a liquid discharge hole of an oil pump by the retainer frame and the flow-distributing shaft; the pinions and the retainer frame are made of light wear-resistant materials; the tooth number of each pinion tooth is a multiple of an integer not equal to 3; and the flow of the three pairs of internally-geared gears is mutually staggered and added so that the oil-absorbing process and the oil discharge process have small flow pulsation, and the defects of great pulsation, great vibration and high noise of the common gear pump are effectively overcome. The internally-geared low-pulsation gear pump has small flow and pressure pulsation, smooth operation and little noise, belongs to middle-high voltage great-flow low-pulsation hydraulic pumps and can be widely applied to hydraulic systems, such as machine tools, automobiles, construction machinery, injection machinery and oil field machinery.

Description

A kind of internally-geared low-pulsation gear pump
Technical field
The present invention relates to a kind of crescent gear pump, a kind of specifically internally-geared low-pulsation gear pump is applicable to mineral oil, emulsified liquid or water to be the system of working medium, is to have the low pulsation of flow, and the characteristics of low noise belong to the fluid transmission field.
Background technique
In the Fluid Transmission and Control technology, mostly the oil hydraulic pump of use is full depth tooth wheel pump, vane pump and plunger pump, and such pump is when high-pressure large-displacement; Flow and pressure pulsation are big; Noise is big, and the life-span is short, and wherein gear pump occupies and consequence always; It is widely used in the hydraulic system of lathe, automobile, building machinery, injection machine and oilfield machinery, but the pulsation of high-pressure gear pump and noise are that problem to be solved is arranged always.
Summary of the invention
In order to overcome above deficiency, the object of the present invention is to provide a kind of middle and high pressure gear pump of internally-geared low-pulsation.
This research and design the middle and high pressure gear pump of a kind of internally-geared low-pulsation, propose a kind of new by many middle and high pressure gear pumps of internally-geared low-pulsation that crescent gear pump is formed after staggered superposition, except that general advantage with common crescent gear pump; It is in a basic balance also to have radial hydraulic pressure, and flow pulsation is low, the advantage that noise is little; Let the flow of three pairs of inside engaged gears realize staggered superposition; It is original 1/9 that flow pulsation has only, and is lower than 0.5%, and flow increases three times.
The technological scheme that the present invention solves its technical problem employing is: a kind of characteristic of internally-geared low-pulsation gear pump is: motor drives axle 10 rotates; Driving gear 15 connects through spline and axle 10; Engagement drives internal gear 4 and rotates, several pinion in mesh with it 5 that evenly distribute in the ring gear 4 that floats, and the number of small gear 5 can be 2 to 4 and not wait; With retainer 8, support by pintle.Front cover 1, rear end cover 9, intermediate 3, internal gear 4, small gear 5, pintle 7, retainer 8, driving gear 15 constitutes three airtight imbibition chambeies 21, three exhaust chambers 22.Be furnished with filler opening 17 on the front cover 1, be furnished with oil outlet 18 on the rear end cover 9.Intermediate 3 is fixed together through bolt 13 with front cover 1 and rear end cover 9.
A kind of structure of internally-geared low-pulsation gear pump is an example with three small gears that are uniformly distributed with, shown in Figure of description 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, accompanying drawing 5, accompanying drawing 6 and accompanying drawing 7; Internal gear and three small gear dislocation engagements that are uniformly distributed with, the impact and the noise that had been produced in the time of so both can having avoided list to gear engagement can make the flow pulsation of this oil hydraulic pump reduce greatly again.
The present invention compares with background technique, and the beneficial effect that has is:
1. owing to the invention belongs to crescent gear pump, its three pairs of small gears and internal gear dislocation engagement realize that low discharge pulses, and its flow pulsation can be lower than 1%, delivery quality be improved significantly.
2. compare with common crescent gear pump, suffered radial hydraulic pressure is a balance on its internal gear.
So the present invention has simple in structure, pressure and flow pulsation is little, operate steadily, low noise advantages can be used as mesohigh high-volume hydraulic pump and uses.
Description of drawings
Below in conjunction with accompanying drawing and instance the present invention is further specified.
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is a structure exploded perspective view of the present invention.
Fig. 3 is the structural principle schematic representation of Fig. 1 of the present invention.
Fig. 4 is the retainer structural representation of Fig. 1 of the present invention.
Fig. 5 is the A-A sectional drawing of the retainer of Fig. 1 of the present invention.
Fig. 6 is the pintle schematic representation of Fig. 1 of the present invention.
Fig. 7 is that the B-B of the pintle of Fig. 1 of the present invention cuts open and shows schematic representation.
1. front covers among the figure, 2. housing seal circle, 3. intermediate, 4. internal gear, 5. small gear, 6. small sealing ring; 7 pintles, 8. retainer, 9. rear end cover, 10. transmission shaft, 11. bearing caps, 12. bearings; 13. the housing connecting bolt, 14. bearing cap stove bolts, 15.. driving gear, 16. nuts, 17. filler openings; 18. oil outlet, 19. filler opening ring shaped slots, 20. oil outlet ring shaped slots, 21. imbibition chambeies, 22. exhaust chambers
Embodiment
Like Fig. 1,2,3,4,5,6, shown in 7, driving gear 15 connects with axle 10 through spline, drive internal gear 4 and rotate, in the internal gear 4 evenly 3 of distributions pinion in mesh 5 and retainer 8 are supported by pintle 7 together with it.Front cover 1, rear end cover 9 be with internal gear 4, three small gears 5, retainer 8 and pintles 7, constitutes three airtight imbibition chambeies 21, three exhaust chambers 22, is furnished with filler opening 17 on the front cover 1, is furnished with oil outlet 18 on the rear end cover 9.Front cover 1, rear end cover 9 among intermediate and Fig. 2 are fixed together; 3 in front cover 1, rear end cover 9 and intermediate are with seal ring 2 sealings; Connect with bolt 13, have retainer filler opening ring shaped slot 19 and retainer oil outlet ring shaped slot 20 on the retainer 8, with small sealing ring 6 sealings.
During this invention work; 10 rotations of motor drives axle, driving gear rotates through spline and axle synchronously, drives internal gear 4 rotations; Three small gears 5 rotate with retainer 8 simultaneously; Pressured fluid gets into three pairs of internal gear low pressure seal chambeies by liquid entering hole 17 through pintle 7, inside hydraulic fluid port in retainer filler opening ring shaped slot 19, retainer 8, and liquid is discharged by liquid outlet 18 through retainer oil outlet ring shaped slot 20, pintle 7 then.
This invention since internal gear 4 simultaneously and the 5 dislocation engagements of three small gears, both cocoa significantly reduced its flow pulsation, had avoided single impact and noise that is produced during to gear engagement again, flow pulsation is lower than 0.5%.

Claims (2)

1. internally-geared low-pulsation gear pump; It is characterized in that: motor drives axle (10) rotates, and driving gear (15) connects through spline and axle (10), and engagement drives internal gear (4) and rotates; Several pinion in mesh with it (5) evenly distribute in the internal gear (4) that floats; The number of small gear (5) is 2 to 4, with retainer (8), is supported by pintle; Front cover (1), intermediate (3), internal gear (4), small gear (5), pintle (7), retainer (8), driving gear (15) constitute three airtight imbibition chambeies (21); Rear end cover (9), intermediate (3), internal gear (4), small gear (5), pintle (7), retainer (8), driving gear (15) constitute three airtight exhaust chambers (22); What front cover (1) was gone up layout is filler opening (17), and what rear end cover (9) was gone up layout is oil outlet (18); Intermediate (3) is fixed together through bolt (13) with front cover (1) and rear end cover (9); The number of teeth of internal gear (4) is the integral multiple of small gear (5) number; Retainer (8) is realized the axle flow with pintle (7), and its flow pulsation is lower than 0.5%.
2. a kind of internally-geared low-pulsation gear pump according to claim 1 is characterized in that: the structure of small gear (5) is the gear structure of symmetry, and the number of small gear (5) is 2 to 4, and structural parameter are identical.
CN2008101317206A 2008-06-20 2008-06-20 Internally-geared low-pulsation gear pump CN101608617B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008101317206A CN101608617B (en) 2008-06-20 2008-06-20 Internally-geared low-pulsation gear pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008101317206A CN101608617B (en) 2008-06-20 2008-06-20 Internally-geared low-pulsation gear pump

Publications (2)

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CN101608617A CN101608617A (en) 2009-12-23
CN101608617B true CN101608617B (en) 2012-07-25

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745355A (en) * 1953-06-01 1956-05-15 Roper Corp Geo D Pump or fluid motor of the gear type
CN2191296Y (en) * 1994-03-04 1995-03-08 甘肃工业大学 High-pressure large-drain radial plunger pump with two rotors
CN2359496Y (en) * 1998-09-02 2000-01-19 合肥长源液压件股份有限公司 Bidirection rotary gear oil pump
CN1085787C (en) * 1994-04-25 2002-05-29 迪特尔·布罗克斯 Internal toothed belt pump
CN2567369Y (en) * 2002-08-06 2003-08-20 李岳 Planetary gear pump
CN1179129C (en) * 1999-05-18 2004-12-08 Gkn金属烧结有限公司 Toothed rotor set
CN2929290Y (en) * 2006-05-27 2007-08-01 安徽理工大学 Multigear hydraulic motor
CN100357605C (en) * 2003-11-11 2007-12-26 上海师范大学 Cycloidal pin gear hydraulic pump
CN101131152A (en) * 2007-10-16 2008-02-27 天津市泽华源泵业科技发展有限公司 Constant-pressure variable radial-plunger pump
CN101144461A (en) * 2007-10-31 2008-03-19 上海师范大学 Pore-pin type cycloid rotor motor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745355A (en) * 1953-06-01 1956-05-15 Roper Corp Geo D Pump or fluid motor of the gear type
CN2191296Y (en) * 1994-03-04 1995-03-08 甘肃工业大学 High-pressure large-drain radial plunger pump with two rotors
CN1085787C (en) * 1994-04-25 2002-05-29 迪特尔·布罗克斯 Internal toothed belt pump
CN2359496Y (en) * 1998-09-02 2000-01-19 合肥长源液压件股份有限公司 Bidirection rotary gear oil pump
CN1179129C (en) * 1999-05-18 2004-12-08 Gkn金属烧结有限公司 Toothed rotor set
CN2567369Y (en) * 2002-08-06 2003-08-20 李岳 Planetary gear pump
CN100357605C (en) * 2003-11-11 2007-12-26 上海师范大学 Cycloidal pin gear hydraulic pump
CN2929290Y (en) * 2006-05-27 2007-08-01 安徽理工大学 Multigear hydraulic motor
CN101131152A (en) * 2007-10-16 2008-02-27 天津市泽华源泵业科技发展有限公司 Constant-pressure variable radial-plunger pump
CN101144461A (en) * 2007-10-31 2008-03-19 上海师范大学 Pore-pin type cycloid rotor motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
宋艳丽,许贤良,赵连春.三惰轮复合齿轮泵的内部泄漏特性分析.《液压与气动》.2005,(第5期),62-64页. *

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C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20091223

Assignee: FENGTAI KAIXING MINING EQUIPMENT CO., LTD.

Assignor: Anhui University Of Science And Technology

Contract record no.: 2014340000097

Denomination of invention: Internally-geared low-pulsation gear pump

Granted publication date: 20120725

License type: Exclusive License

Record date: 20140428

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
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Granted publication date: 20120725

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