CN2746159Y - Moving-gear pump - Google Patents
Moving-gear pump Download PDFInfo
- Publication number
- CN2746159Y CN2746159Y CN 200420064092 CN200420064092U CN2746159Y CN 2746159 Y CN2746159 Y CN 2746159Y CN 200420064092 CN200420064092 CN 200420064092 CN 200420064092 U CN200420064092 U CN 200420064092U CN 2746159 Y CN2746159 Y CN 2746159Y
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- CN
- China
- Prior art keywords
- gear
- oscillating tooth
- oscillating
- tooth
- moving
- 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
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The utility model relates to a moving-gear pump, which is suitable for a hydraulic system adopting hydraulic-oil as the working substance. A shell is provided with an elliptical center wheel. An oscillating tooth carrier is arranged outside the center wheel, and a ring gear is arranged outside the oscillating tooth carrier, and the ring gear is fixedly connected with the shell. The oscillating tooth carrier is uniformly arranged 6 radial guide grooves, and each guide groove is provided with an oscillating tooth. When the center wheel rotates anticlockwise, the interaction between the oscillating tooth and the tooth profile of the ring gear drives the oscillating tooth gear to rotate clockwise. Because many oscillating teeth are meshed with the center wheel and the ring gear simultaneously, the impingement and noise on the occasion of tooth mesh can be reduced, simultaneously the displacement of the pump can be increased and greatly the flow quality of the pump can be improved.
Description
Technical field
The utility model relates to a kind of Moving-gear pump, is applicable to mineral oil to be the system of working medium, belongs to the hydraulic transmission field.
Background technique
At present, the gear pump that uses in Hydraulic Power Transmission System mostly is external gear pump, and this gear pump is meshing with each other by the gear of two identical parameters and constitutes.Characteristics such as gear pump is little, simple in structure with its volume, easy processing, cost is low, working service is convenient and obtain extensive use.But the impact noise of gear pump is big, flow pulsation is big, and this has limited the application area of gear pump again, especially in high-precision Hydraulic Power Transmission System, seldom adopts gear pump as dynamical element.
Summary of the invention
In order to overcome the deficiency that the gear pump impact noise is big, flow pulsation is big, the utility model provides a kind of Moving-gear pump.This Moving-gear pump not only has the characteristics that impact is little, noise is low, and discharge capacity is big, flow pulsation is little.
The technological scheme that its technical problem that solves the utility model adopts is: an oval central gear is installed at the center at housing, is movable teeth rack in the outside of central gear, and the outside of movable teeth rack is a ring gear, and ring gear and housing are fixed together.Even 6 radial grooves that distribute in the movable teeth rack, oscillating tooth can move in the radial groove of movable teeth rack.Movable teeth rack and oscillating tooth are collectively referred to as oscillating tooth gear.When central gear counterclockwise rotated, the central gear flank profil promoted oscillating tooth and moves radially, and under the effect of ring gear flank profil curved surface, the movable teeth rack clockwise direction rotates.So some tooth of central gear and oscillating tooth gear and the formed sealed volume of side sheet room reduce gradually, thereby form laminated oil zone; And some tooth corresponding with above-mentioned oscillating tooth and side sheet room form the oil suction district; All the other oscillating tooths and side sheet room then are transition zone.In the engagement process of oscillating tooth gear and ring gear, the preceding flank of tooth of each oscillating tooth (being as the criterion according to the central gear sense of rotation) and movable teeth rack and ring gear form laminated oil zone; And the back flank of tooth of each oscillating tooth and movable teeth rack and ring gear form the oil suction district.Liquid enters the pump housing by the liquid entering hole on the housing, discharges the pump housing by the liquid outlet on the end cap.
The beneficial effects of the utility model are can increase pump delivery (multiple tooth while discharge opeing), and significantly reduce its flow pulsation.In addition, because multiple tooth engagement simultaneously can reduce to impact, reduce the noise of pump.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is a structural drawing of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
1. housings among the figure, 2. left thrust plate, 3. side plate, 4. oscillating tooth, 5. ring gear, 6. central gear, 7. movable teeth rack, 8. right thrust plate, 9. end cap, 10. bearing, 11. lip-type packings, 12.O shape seal ring, 13. locating studs, 14. screws.
Embodiment
In Fig. 1 and Fig. 2, an oval central gear (6) is installed in the housing (1), be movable teeth rack (7) in the outside of central gear (6), 6 oscillating tooths (4) radially evenly are installed in the movable teeth rack (7).Movable teeth rack (7) is collectively referred to as oscillating tooth gear with oscillating tooth (4).The outside of movable teeth rack is ring gear (5), and ring gear (5) is fixed together by locating stud (13) with housing (1).The two ends of oscillating tooth gear have been installed side plate (3) and left and right sides thrust plate (2,8) respectively.Central gear (6) is supported by 2 bearings (10).End cap (9) is connected with housing (1) by screw (14).
During this model utility work, prime mover power is by central gear (6) input (supposing to be rotated counterclockwise), and central gear (6) forces oscillating tooth gear to clockwise rotate by oscillating tooth (4) and ring gear (5) engagement.Liquid is entered by the liquid entering hole on the housing (1), enters by c respectively through feed pathway
#-d
#Tooth, f
#-a
#Tooth and side plate (3) and movable teeth rack (7) the oil suction district T that forms; Pressured fluid is then from by a
#-b
#Tooth, d
#-e
#Tooth and side plate (3) and the formed laminated oil zone P of movable teeth rack (7) through apocenosis passage by the liquid outlet excavationg pump on the end cap (9) outside.
This model utility is owing to there are a plurality of oscillating tooths (4) simultaneously and central gear (6) and ring gear (5) engagement, avoided single impact and noise that is produced during to gear engagement.Equally, because multiple tooth while discharge opeing can increase pump delivery, and can significantly reduce its flow pulsation.
Claims (5)
1. Moving-gear pump, an oval central gear is installed in housing, an oscillating tooth gear is installed in the outside of central gear, a ring gear is installed in the outside of oscillating tooth gear, ring gear and housing are fixed together, and the front end of oscillating tooth gear is installed side plate, and a thrust plate is respectively installed at the two ends of side plate and oscillating tooth gear, an end cap is installed at the rear portion of housing, it is characterized in that: oval central gear is meshed with ring gear by a plurality of oscillating tooths simultaneously.
2. Moving-gear pump according to claim 1 is characterized in that: oval central gear is the multidiameter shaft structure, and middle part with the oscillating tooth gear engagement is an elliptical section, and all the other are circular cross section, and the center hole that the one end passes housing stretches out outside.
3. Moving-gear pump according to claim 1 is characterized in that: oscillating tooth gear is made up of oscillating tooth and movable teeth rack, and the number of oscillating tooth is 3-8, and structural parameter are identical.
4. Moving-gear pump according to claim 1 is characterized in that: oval central gear is by bearings.
5. Moving-gear pump according to claim 1 is characterized in that: oval central gear can be made of metal, also can make of composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064092 CN2746159Y (en) | 2004-05-14 | 2004-05-14 | Moving-gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064092 CN2746159Y (en) | 2004-05-14 | 2004-05-14 | Moving-gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2746159Y true CN2746159Y (en) | 2005-12-14 |
Family
ID=35582740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420064092 Expired - Fee Related CN2746159Y (en) | 2004-05-14 | 2004-05-14 | Moving-gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2746159Y (en) |
-
2004
- 2004-05-14 CN CN 200420064092 patent/CN2746159Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |