CN103541893A - Inner gearing shaft head cycloid gear pump - Google Patents
Inner gearing shaft head cycloid gear pump Download PDFInfo
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- CN103541893A CN103541893A CN201310537722.6A CN201310537722A CN103541893A CN 103541893 A CN103541893 A CN 103541893A CN 201310537722 A CN201310537722 A CN 201310537722A CN 103541893 A CN103541893 A CN 103541893A
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- gear
- rotor gear
- end cover
- transmission shaft
- cycloid
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Abstract
The invention provides an inner gearing shaft head cycloid gear pump. The cycloid gear pump comprises a box shell, a transmission shaft, a pump body part, a spring and a flow distributor, wherein the pump body part is nested on the transmission shaft and is arranged in the box shell, the box shell is provided with an oil inlet and an oil outlet, the pump body part comprises an outer shell, a sealing end cover, an outer rotor gear, an inner rotor gear and a fixed shaft, the outer rotor gear, the inner rotor gear and the fixed shaft are arranged in a cavity formed by the outer shell and the sealing end cover, the sealing end cover is arranged at the front end of the transmission shaft and is nested on the fixed shaft, the inner rotor gear is fixed on the fixed shaft, the outer rotor gear is fixed on the outer side of the inner rotor gear, the axis of the inner rotor gear is parallel to but does not coincide with the axis of the outer rotor gear, the spring is arranged between the sealing end cover and the transmission shaft, and the flow distributor is arranged at the joint between the pump body part and the oil inlet and the oil outlet. The inner gearing shaft head cycloid gear pump has the characteristics of adaptability to high rotating speed, good sealing performance and long service life.
Description
Technical field
The present invention relates to gear pump field, especially, relate to a kind of interior engagement spindle nose cycloid gear pump.
Background technique
Gear pump is as the important composition parts of mechanical transmission, in hydraulic transmission and the field such as lubricated, is widely applied.Existing gear pump mainly contains external gear pump and the large class of crescent gear pump two:
(1) common gear pump is mostly external gear pump, and the instantaneous flow of external gear pump becomes with the position of contact points.When contact points is during apart from maximum, output flow is minimum; When contact points overlaps with node, output flow is maximum, thereby makes the output flow of gear pump be larger periodic pulsation, thereby affects the stationarity of hydraulic system and cause noise.
(2) in, mesh the advantages such as Gerotor pump is large with its per unit volume discharge capacity, volumetric efficiency is high, flow pulsation is little, compact overall structure and be subject to the great attention in industry, existing cycloid gear pump is mainly comprised of main parts size such as inner and outer rotors 2, rotor shaft 6, protecgulum 13, bonnet 9, gland 19, the first flat key 3, internal rotor 5, bearing 10, back-up ring 11, the pump housing 12, flange 15, seal ring 16, the second flat keys 17, also comprise the annexes such as the first screw 1, straight pin 4, rivet 7, the second screw 14, stopper 18, label 8, refer to Fig. 1, Fig. 2.During normal operation, motor is by the second flat key 17 rotor driven axle 6 rotations, and rotor shaft 6 drives internal rotor 5 to rotate by the first flat key 3.Because the inner and outer rotors number of teeth has a tooth poor, in engagement process, there is " secondary engagement " to exist, therefore, can form several independently sealing bag sap cavities; Along with the engagement rotation of inner and outer rotors, there is different variations in each volume that wraps sap cavity, when bag sap cavity volume changes from small to big, in bag sap cavity, produce parital vacuum, under atmospheric pressure effect, the circular groove that liquid covers by inlet pipeline and gear pump, enters pump chamber and starts imbibition; When bag sap cavity volume reaches maximum, imbibition process finishes; When the volume of bag in sap cavity is from large to small time, the liquid in bag sap cavity is just from another circular groove extrusion, this discharge process that is pump; In the course of the work, a tooth of internal rotor turns over one week to pump, occurs a work cycle, completes pump imbibition to the process of discharge opeing.This type of pump has following shortcoming: (1) working speed can not be too high, and front and rear cover and inner and outer rotors are easy to wear, and working life is short; (2) seal ring place easily reveals, poor sealing, and practicability is not strong.
Therefore, inventing a kind of cycloid gear pump that is applicable to high rotating speed, good airproof performance and long service life has a very big significance.
Summary of the invention
The object of the invention is to provide a kind of interior engagement spindle nose cycloid gear pump that is applicable to high rotating speed, good airproof performance and long service life, the technical solution used in the present invention specifically:
An engagement spindle nose cycloid gear pump, comprises wheel chamber casing, transmission shaft, pump housing part, spring and thrust plate;
The described pump housing is partly nested on transmission shaft and is located at the inside of described wheel chamber casing, and described wheel chamber casing is provided with filler opening and oil outlet;
The described pump housing partly comprises frame, end cover, outer rotor gear, internal rotor gear and stationary axle, and described outer rotor gear, internal rotor gear and stationary axle are all located in the cavity being comprised of described frame and end cover;
Described end cover is located at described transmission shaft front end, and described end cover is nested with stationary axle; On described stationary axle, be fixed with internal rotor gear, described internal rotor gear outside is fixed with outer rotor gear;
The axis of described internal rotor gear is parallel with the axis of described outer rotor gear and do not coincide, and described in the gear ratio of described internal rotor gear, the number of teeth of outer rotor gear is few;
Described spring is arranged between described end cover and described transmission shaft;
Described thrust plate is arranged on described filler opening, oil outlet and described pump housing part joint.
Preferred in above technological scheme, the joint of described wheel chamber casing and described transmission shaft is provided with ball bearing.
Preferred in above technological scheme, few 1 of the number of teeth of outer rotor gear described in the gear ratio of described internal rotor gear.
Preferred in above technological scheme, described thrust plate and described wheel chamber casing joint are provided with stopping device.
Preferred in above technological scheme, described stopping device is stop pin.
Preferred in above technological scheme, the material of described outer rotor gear and internal rotor gear is surface through the 38CrMoAlA of nitrogenize.
Preferred in above technological scheme, the center of circle, cross section of described filler opening and oil outlet is on same straight line.
The present invention has following beneficial effect:
(1) interior engagement spindle nose cycloid gear pump of the present invention comprises that wheel chamber casing, transmission shaft, pump housing part, spring and several part-structures of thrust plate are compact, and component are few, and volume is little, can directly at spindle nose, use.
(2) interior engagement spindle nose cycloid gear pump of the present invention is provided with spring between end cover and transmission shaft, makes under the effect of spring, to have the function of auto-compensation after end cover wearing and tearing, has both been applicable to the working life that high rotary speed working has also extended gear pump.
(3) in interior engagement spindle nose cycloid gear pump of the present invention, filler opening, oil outlet and pump housing part joint are provided with thrust plate, and lubricating oil is inhaled into from filler opening, by thrust plate, is pressurized, and the lubricating oil after supercharging is discharged from from oil outlet, greatly improves the flow of pump.
(4) in interior engagement spindle nose cycloid gear pump of the present invention, the axis of internal rotor gear and the axis of outer rotor gear are parallel and do not coincide, and few 1 of the number of teeth of the gear ratio outer rotor gear of internal rotor gear, the mutual wearing and tearing of the two rotor flank of tooth are little, and noise is little, long service life.
(5) in interior engagement spindle nose cycloid gear pump of the present invention, the joint of wheel chamber casing and transmission shaft is provided with ball bearing, makes transmission better effects if.
(6) in interior engagement spindle nose cycloid gear pump of the present invention, thrust plate and wheel chamber casing joint are provided with stopping device, and especially stop pin, makes thrust plate fixing more steady, and during pump work, integral body is more stable.
(7) in interior engagement spindle nose cycloid gear pump of the present invention, outer rotor gear and internal rotor gear adopt surface through the 38CrMoAlA material of nitrogenize, and wear resistance is good, extend the working life of pump.
(8) in interior engagement spindle nose cycloid gear pump of the present invention, the center of circle, cross section of filler opening and oil outlet is on same straight line, and oil stream is more steady.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to accompanying drawings, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is accompanying drawing 1 in background technique;
Fig. 2 is accompanying drawing 2 in background technique;
Fig. 3 is the sectional drawing of the preferred embodiment of the present invention 1;
Fig. 4 is the face upwarding section of Fig. 3;
31-stop pin, 32-sliding bearing, 321-sliding bearing filler opening, 33-outer rotor gear, 34-wheel chamber casing, 35-ball bearing, 36-transmission shaft, 37-spring, 38-frame, 39-end cap, 310-internal rotor gear, 311-stationary axle, 312-thrust plate, 313-filler opening, 314-oil outlet.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can limit and cover according to claim is implemented.
Embodiment 1:
The invention discloses a kind of interior engagement spindle nose cycloid gear pump, comprise wheel chamber casing 34, transmission shaft 36, pump housing part, spring 37 and thrust plate 312, refer to Fig. 3 and Fig. 4, compact overall structure, component are few, and volume is little, can be directly used on spindle nose.
The described pump housing is partly nested on transmission shaft 36 and is arranged on the inside of described wheel chamber casing 34, described wheel chamber casing 34 is provided with filler opening 313 and oil outlet 314, the center of circle, cross section of described filler opening 313 and oil outlet 314 is on same straight line, be convenient to oil turnover, and make oil stream more steady.
The described pump housing partly comprises frame 38, end cover 39, outer rotor gear 33, internal rotor gear 310 and stationary axle 311, and described outer rotor gear 33, internal rotor gear 310 and stationary axle 311 are all arranged in the cavity being comprised of described frame 38 and end cover 39; Described end cover 39 is arranged on described transmission shaft 36 front ends, and described end cover 39 is nested with stationary axle 311; On described stationary axle 311, be fixed with internal rotor gear 310, described internal rotor gear 310 outsides are fixed with outer rotor gear 33.
The axis of the axis of described internal rotor gear 310 and described outer rotor gear 33 is parallel and do not coincide, both throw of eccentric are e, and described in the gear ratio of described internal rotor gear 310, the number of teeth of outer rotor gear 33 is lacked 1, and the mutual wearing and tearing of the two rotor flank of tooth are little, noise is little, long service life.
Described spring 37 is arranged between described end cover 39 and described transmission shaft 36, makes under the effect of spring, to have the function of auto-compensation after end cover wearing and tearing, has both been applicable to the working life that high rotary speed working has also extended pump.
Described thrust plate 312 is arranged on described filler opening 313, oil outlet 314 and described pump housing part joint, and lubricating oil is inhaled into from filler opening, by thrust plate, is pressurized, and the lubricating oil after supercharging is discharged from from oil outlet, greatly improves the flow of pump.
Described wheel chamber casing 34 is provided with ball bearing 35 with the joint of described transmission shaft 36, makes transmission better effects if.
Described thrust plate 312 is provided with stopping device 31 with described wheel chamber casing 34 joints, and the preferred stop pin of described stopping device 31 makes thrust plate fixing more steady, and during pump work, integral body is more stable.
The material of described outer rotor gear 33 and internal rotor gear 310 is surface through the 38CrMoAlA of nitrogenize, wear-resisting effective, long service life.
Between described frame 38 and described wheel chamber casing 34, be also provided with sliding bearing 32, sliding bearing 32 is provided with sliding bearing filler opening 321, and be convenient to pump has certain deviation when work, keeps the global stability of pump.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. in, mesh a spindle nose cycloid gear pump, it is characterized in that: comprise wheel chamber casing (34), transmission shaft (36), pump housing part, spring (37) and thrust plate (312);
The described pump housing is partly nested in transmission shaft (36) above and is located at the inside of described wheel chamber casing (34), and described wheel chamber casing (34) is provided with filler opening (313) and oil outlet (314);
The described pump housing partly comprises frame (38), end cover (39), outer rotor gear (33), internal rotor gear (310) and stationary axle (311), and described outer rotor gear (33), internal rotor gear (310) and stationary axle (311) are all located in the cavity being comprised of described frame (38) and end cover (39);
Described end cover (39) is located at the front end of described transmission shaft (36), and described end cover (39) is nested with stationary axle (311); On described stationary axle (311), be fixed with internal rotor gear (310), described internal rotor gear (310) outside is fixed with outer rotor gear (33);
The axis of the axis of described internal rotor gear (310) and described outer rotor gear (33) is parallel and do not coincide, and described in the gear ratio of described internal rotor gear (310), the number of teeth of outer rotor gear (33) is few;
Described spring (37) is arranged between described end cover (39) and described transmission shaft (36);
Described thrust plate (312) is arranged on described filler opening (313) and oil outlet (314) and described pump housing joint partly.
2. interior engagement spindle nose cycloid gear pump according to claim 1, is characterized in that: described wheel chamber casing (34) is provided with ball bearing (35) with the joint of described transmission shaft (36).
3. interior engagement spindle nose cycloid gear pump according to claim 1, is characterized in that: described in the gear ratio of described internal rotor gear (310), the number of teeth of outer rotor gear (33) is few 1.
4. interior engagement spindle nose cycloid gear pump according to claim 1, is characterized in that: described thrust plate (312) is provided with stopping device (31) with described wheel chamber casing (34) joint.
5. interior engagement spindle nose cycloid gear pump according to claim 4, is characterized in that: described stopping device (31) is stop pin.
6. interior engagement spindle nose cycloid gear pump according to claim 1, is characterized in that: the material of described outer rotor gear (33) and internal rotor gear (310) is surface through the 38CrMoAlA of nitrogenize.
7. interior engagement spindle nose cycloid gear pump according to claim 1, is characterized in that: the center of circle, cross section of described filler opening (313) and oil outlet (314) is on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310537722.6A CN103541893B (en) | 2013-11-04 | 2013-11-04 | A kind of internal messing spindle nose cycloid gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310537722.6A CN103541893B (en) | 2013-11-04 | 2013-11-04 | A kind of internal messing spindle nose cycloid gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103541893A true CN103541893A (en) | 2014-01-29 |
| CN103541893B CN103541893B (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310537722.6A Active CN103541893B (en) | 2013-11-04 | 2013-11-04 | A kind of internal messing spindle nose cycloid gear pump |
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| CN (1) | CN103541893B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050056A (en) * | 2017-12-21 | 2018-05-18 | 胡忠胜 | A kind of internal messing cycloidal gear type hydraulic pressure transformers |
| CN108612652A (en) * | 2016-12-13 | 2018-10-02 | 株式会社马勒滤清系统 | Electrodynamic pump |
| CN114135482A (en) * | 2021-11-29 | 2022-03-04 | 涌镇液压机械（上海）有限公司 | Axis-free cycloid gear pump |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3127843A (en) * | 1960-03-22 | 1964-04-07 | Robert W Brundage | Hydraulic pump or motor |
| JPH1122655A (en) * | 1997-07-03 | 1999-01-26 | Toyooki Kogyo Co Ltd | Internal gear pump |
| CN1854524A (en) * | 2005-04-29 | 2006-11-01 | 上海发电设备成套设计研究所 | Method and device for supplying oil of decelerator corotation or reversed rotation |
-
2013
- 2013-11-04 CN CN201310537722.6A patent/CN103541893B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3127843A (en) * | 1960-03-22 | 1964-04-07 | Robert W Brundage | Hydraulic pump or motor |
| JPH1122655A (en) * | 1997-07-03 | 1999-01-26 | Toyooki Kogyo Co Ltd | Internal gear pump |
| CN1854524A (en) * | 2005-04-29 | 2006-11-01 | 上海发电设备成套设计研究所 | Method and device for supplying oil of decelerator corotation or reversed rotation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612652A (en) * | 2016-12-13 | 2018-10-02 | 株式会社马勒滤清系统 | Electrodynamic pump |
| CN108050056A (en) * | 2017-12-21 | 2018-05-18 | 胡忠胜 | A kind of internal messing cycloidal gear type hydraulic pressure transformers |
| CN114135482A (en) * | 2021-11-29 | 2022-03-04 | 涌镇液压机械（上海）有限公司 | Axis-free cycloid gear pump |
| CN114135482B (en) * | 2021-11-29 | 2023-11-24 | 涌镇液压机械（上海）有限公司 | Cycloidal gear pump without axle center |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103541893B (en) | 2016-03-16 |
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Effective date of registration: 20151104 Address after: Dong Jia Duan high-tech park in Hunan province 412002 Zhuzhou city Lusong District Applicant after: Hunan Nanfang Aviation High Precision Transmission Co., Ltd. Address before: Dong Jia Duan high-tech park in Hunan province 412002 Zhuzhou city Lusong District Applicant before: Zhuzhou Gaojing Transmission Technology Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |