CN203702545U - Internal gear pump - Google Patents

Internal gear pump Download PDF

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Publication number
CN203702545U
CN203702545U CN201420077235.6U CN201420077235U CN203702545U CN 203702545 U CN203702545 U CN 203702545U CN 201420077235 U CN201420077235 U CN 201420077235U CN 203702545 U CN203702545 U CN 203702545U
Authority
CN
China
Prior art keywords
cover plate
ring gear
gear
limiting board
pump housing
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.)
Expired - Fee Related
Application number
CN201420077235.6U
Other languages
Chinese (zh)
Inventor
李光明
周业刚
危志飞
郑建安
孙步群
范能胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU CHIXIANG PRECISION GEAR CO., LTD.
Original Assignee
JIANGSU CHIXIANG PRECISION GEARS CO Ltd
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 JIANGSU CHIXIANG PRECISION GEARS CO Ltd filed Critical JIANGSU CHIXIANG PRECISION GEARS CO Ltd
Priority to CN201420077235.6U priority Critical patent/CN203702545U/en
Application granted granted Critical
Publication of CN203702545U publication Critical patent/CN203702545U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an internal gear pump with stable pressure, which comprises a pump body, as well as an oil inlet and an oil outlet both formed in the pump body, wherein an internally toothed annulus is arranged inside the pump body in a rotating manner; a low pressure cavity is communicated with the oil outlet through oil feeding openings in the internally toothed annulus; a pressure adjusting slot is formed in the inner wall, at the oil outlet, of the pump body; an included angle a between one end of the pressure adjusting slot and the center of the internally toothed annulus is 8-15 degrees; the included angle b between the other end of the pressure adjusting slot and the center of the internally toothed annulus is 75-87 degrees.

Description

Crescent gear pump
Technical field
The utility model relates to a kind of gear pump, relates in particular to a kind of crescent gear pump.
Background technique
Gear pump is for delivery of the larger liquid of viscosity, as lubricant oil and combustion oil, should not carry the liquid that viscosity is lower (such as water and gasoline etc.), should not carry the liquid (affecting the working life of pump) that contains granule foreign, can be used as lubrication system oil pump and hydraulic system oil pump, be widely used in motor, steam turbine, centrifugal compressor, lathe and other equipment, the processing technology of gear pump requires to cry high, is difficult for obtaining accurate coupling.Gear pump can be divided into external gear pump and internal gear pump, and in the situation that head pressure is identical with flow, the boundary dimension of internal gear pump is little compared with external gear pump.Two gear shape differences of internal gear pump, the number of teeth is also different, and one of them is annular gear wheel, can in the pump housing, float, middle one is driving gear, becomes eccentric position with the pump housing, driving gear drives annular gear wheel to rotate together, utilizes the variation of two interdental spaces to carry liquid.Also have a kind of internal gear pump that a fixing arc-shaped partition is housed between two gears, sucking and venting space has obviously been separated.Existing crescent gear pump, the wear problem between the outer surface of ubiquity driving gear and annular gear wheel internal surface, the pressure of pump body is also unstable simultaneously.Although some design proposals are in order to solve above-mentioned wear problem, complex structure, manufacturability is poor, and manufacture cost strengthens.
Model utility content
Technical problem to be solved in the utility model is: the crescent gear pump that a kind of pressure stability is provided.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: fixed displacement inside engaged gear pump structure, comprise: the pump housing, be arranged on filler opening and oil outlet on the pump housing, be arranged on left inside cover plate and the left outside cover plate in pump housing left side, be arranged on right inside cover plate and the right outside cover plate on pump housing right side, the described pump housing, left inside cover plate, left outside cover plate, right inside cover plate is fixedly connected with nut by fixing bolt with right outside cover plate, inner rotation at the described pump housing is provided with ring gear, inside at described ring gear is provided with rotating shaft, in rotating shaft, be provided with internal gear, described internal gear departs from mutually mutually with a side inwall center of engaging of ring gear, between described rotating shaft and described left inside cover plate and right inside cover plate, be provided with sliding bearing, between described rotating shaft and described left outside cover plate, be provided with reinforced seal, between the described pump housing and the right inside cover plate on left inside cover plate and right side, be respectively arranged with seal ring, on described ring gear inwall, be evenly provided with some teeth groove that cooperatively interact with internal gear, around the gear ring of described ring gear, be evenly provided with the oil inlet hole that some teeth groove are interconnected, between described ring gear inwall and internal gear, outer arcuate limiting board is set, arc limiting board and positioning plate, the two ends of described positioning plate are fixed on left inside cover plate and right inside cover plate by mounting hole respectively, there are two mounting grooves in the arranged outside of described arc limiting board, in mounting groove between described outer arcuate limiting board and arc limiting board, be provided with Stamping Steel Ribbon and spring sheet, under the effect of spring sheet power, the internal surface of arc limiting board and internal gear fit tightly, outer surface and the ring gear of outer arcuate limiting board fit tightly, described outer arcuate limiting board, arc limiting board will be divided into hyperbaric chamber and low-pressure cavity between ring gear inwall and internal gear, described hyperbaric chamber is connected with described filler opening by oil inlet hole on ring gear, on the inwall of the described oil outlet place pump housing, be provided with pressure regulation groove, between one end of described pressure regulation groove and ring gear center, the scope of angle a is 8~15 degree, between the other end of described pressure regulation groove and ring gear center, the scope of angle b is 75~87 degree.
The utility model has the advantages that: above-mentioned crescent gear pump, low cost of manufacture, pressure is high and stable, noise is little, long service life.
Brief description of the drawings
Fig. 1 is the sectional structure schematic diagram of the utility model inside engaged gear.
Fig. 2 is the sectional structure schematic diagram of A-A direction in Fig. 1.
In figure: 1, the pump housing, 2, filler opening, 3, oil outlet, 4, left inside cover plate, 5, left outside cover plate, 6, right inside cover plate, 7, right outside cover plate, 8, fixing bolt, 9, nut, 10, ring gear, 11, rotating shaft, 12, internal gear, 13, sliding bearing, 14, reinforced seal, 15, seal ring, 16, teeth groove, 17, oil inlet hole, 18, outer arcuate limiting board, 19, arc limiting board, 20, positioning plate, 21, mounting hole, 22, mounting groove, 23, Stamping Steel Ribbon, 24, spring sheet, 25, hyperbaric chamber, 26, low-pressure cavity, 27, pressure regulation groove, 28, bolt hole.
Embodiment
Describe in detail particular content of the present utility model below in conjunction with the drawings and specific embodiments.
As Fig. 1, shown in Fig. 2, crescent gear pump, comprise: the pump housing 1, be arranged on filler opening 2 and oil outlet 3 on the pump housing 1, be arranged on left inside cover plate 4 and the left outside cover plate 5 in the pump housing 1 left side, be arranged on right inside cover plate 6 and the right outside cover plate 7 on the pump housing 1 right side, the described pump housing 1, left inside cover plate 4, left outside cover plate 5, right inside cover plate 6 is fixedly connected with nut 9 by fixing bolt 8 with right outside cover plate 7, as shown in Figure 2, bolt 8 is through the bolt hole 28 on the pump housing 1, be provided with ring gear 10 in the inner rotation of the described pump housing 1, be provided with rotating shaft 11 in the inside of described ring gear 10, in rotating shaft 11, be provided with internal gear 12, described internal gear 12 departs from mutually mutually with a side inwall center of engaging of ring gear 10, between described rotating shaft 11 and described left inside cover plate 4 and right inside cover plate 6, be provided with sliding bearing 13, between described rotating shaft 11 and described left outside cover plate 5, be provided with reinforced seal 14, between the described pump housing 1 and the right inside cover plate 6 on left inside cover plate 4 and right side, be respectively arranged with seal ring 15, on described ring gear 10 inwalls, be evenly provided with some teeth groove 16 that cooperatively interact with internal gear 12, around the gear ring of described ring gear 10, be evenly provided with the oil inlet hole 17 that some teeth groove 16 are interconnected, between described ring gear 10 inwalls and internal gear 12, outer arcuate limiting board 18 is set, arc limiting board 19 and positioning plate 20, the two ends of described positioning plate 20 are fixed on left inside cover plate 4 and right inside cover plate 6 by mounting hole 21 respectively, there are two mounting grooves 22 in the arranged outside of described arc limiting board 19, in mounting groove 22 between described outer arcuate limiting board 18 and arc limiting board 19, be provided with Stamping Steel Ribbon 23 and spring sheet 24, under the effect of spring sheet 24 power, the internal surface of arc limiting board 19 and internal gear 12 fit tightly, the outer surface of outer arcuate limiting board 18 and ring gear 10 fit tightly, described outer arcuate limiting board 18, arc limiting board 19 will be divided into hyperbaric chamber 25 and low-pressure cavity 26 between ring gear 10 inwalls and internal gear 12, described hyperbaric chamber 25 is connected with described filler opening 2 by oil inlet hole 17 on ring gear 10, described low-pressure cavity 26 is connected with described oil outlet 3 by oil inlet hole 17 on ring gear 10, on the inwall of described oil outlet 3 place's pump housings 1, be provided with pressure regulation groove 27, between one end of described pressure regulation groove 27 and ring gear 10 centers, the scope of angle a is 8~15 degree, between the other end of described pressure regulation groove 27 and ring gear 10 centers, the scope of angle b is 75~87 degree.Pressure regulation groove 27 positions and angular setting can make pump internal pressure stable, extend its long service life.
When above-mentioned crescent gear pump uses, power plant drive rotating shaft 11 to rotate, rotating shaft 11 drives internal gear 12, thereby internal gear 12 rotates with the intermeshing drive of ring gear 10 ring gear 10, under the effect of spring sheet 24 elastic force, the internal surface of arc limiting board 19 and internal gear 12 fit tightly, oil enters from filler opening 2, successively, by oil inlet hole 17 on oil inlet hole 17, low-pressure cavity 26, hyperbaric chamber 25, ring gear 10 on filler opening 2, ring gear 10, exports from oil outlet 3.

Claims (1)

1. crescent gear pump, comprise: the pump housing (1), be arranged on filler opening (2) and oil outlet (3) on the pump housing (1), be arranged on left inside cover plate (4) and the left outside cover plate (5) in the pump housing (1) left side, be arranged on right inside cover plate (6) and the right outside cover plate (7) on the pump housing (1) right side, the described pump housing (1), left inside cover plate (4), left outside cover plate (5), right inside cover plate (6) is fixedly connected with nut (9) by fixing bolt (8) with right outside cover plate (7), be provided with ring gear (10) in the inner rotation of the described pump housing (1), be provided with rotating shaft (11) in the inside of described ring gear (10), in rotating shaft (11), be provided with internal gear (12), described internal gear (12) departs from mutually mutually with a side inwall center of engaging of ring gear (10), between described rotating shaft (11) and described left inside cover plate (4) and right inside cover plate (6), be provided with sliding bearing (13), between described rotating shaft (11) and described left outside cover plate (5), be provided with reinforced seal (14), between the described pump housing (1) and the right inside cover plate (6) on left inside cover plate (4) and right side, be respectively arranged with seal ring (15), on described ring gear (10) inwall, be evenly provided with some teeth groove (16) that cooperatively interact with internal gear (12), around the gear ring of described ring gear (10), be evenly provided with the oil inlet hole (17) that some teeth groove (16) are interconnected, between described ring gear (10) inwall and internal gear (12), outer arcuate limiting board (18) is set, arc limiting board (19) and positioning plate (20), the two ends of described positioning plate (20) are fixed on left inside cover plate (4) and right inside cover plate (6) by mounting hole (21) respectively, there are two mounting grooves (22) in the arranged outside of described arc limiting board (19), in mounting groove (22) between described outer arcuate limiting board (18) and arc limiting board (19), be provided with Stamping Steel Ribbon (23) and spring sheet (24), under the effect of spring sheet (24) power, the internal surface of arc limiting board (19) and internal gear (12) fit tightly, the outer surface of outer arcuate limiting board (18) and ring gear (10) fit tightly, described outer arcuate limiting board (18), arc limiting board (19) will be divided into hyperbaric chamber (25) and low-pressure cavity (26) between ring gear (10) inwall and internal gear (12), described hyperbaric chamber (25) is connected with described filler opening (2) by the upper oil inlet hole (17) of ring gear (10), described low-pressure cavity (26) is connected with described oil outlet (3) by the upper oil inlet hole (17) of ring gear (10), it is characterized in that: locate at described oil outlet (3) to be provided with pressure regulation groove (27) on the inwall of the pump housing (1), between one end of described pressure regulation groove (27) and ring gear (10) center, the scope of angle a is 8~15 degree, between the other end of described pressure regulation groove (27) and ring gear (10) center, the scope of angle b is 75~87 degree.
CN201420077235.6U 2014-02-24 2014-02-24 Internal gear pump Expired - Fee Related CN203702545U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420077235.6U CN203702545U (en) 2014-02-24 2014-02-24 Internal gear pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420077235.6U CN203702545U (en) 2014-02-24 2014-02-24 Internal gear pump

Publications (1)

Publication Number Publication Date
CN203702545U true CN203702545U (en) 2014-07-09

Family

ID=51052996

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420077235.6U Expired - Fee Related CN203702545U (en) 2014-02-24 2014-02-24 Internal gear pump

Country Status (1)

Country Link
CN (1) CN203702545U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103883515A (en) * 2014-02-24 2014-06-25 江苏驰翔精密齿轮有限公司 Internal meshing gear pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103883515A (en) * 2014-02-24 2014-06-25 江苏驰翔精密齿轮有限公司 Internal meshing gear pump

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: JIANGSU CHI XIANG PRECISION GEAR CO., LTD.

Free format text: FORMER NAME: JIANGSU CHIXIANG PRECISION GEAR CO., LTD.

CP01 Change in the name or title of a patent holder

Address after: 224015, Jianye Road, Yancheng City District, Jiangsu Province

Patentee after: JIANGSU CHIXIANG PRECISION GEAR CO., LTD.

Address before: 224015, Jianye Road, Yancheng City District, Jiangsu Province

Patentee before: Jiangsu Chixiang Precision Gears Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140709

Termination date: 20170224

CF01 Termination of patent right due to non-payment of annual fee