CN216767743U - High-pressure internal gear pump with novel structure - Google Patents
High-pressure internal gear pump with novel structure Download PDFInfo
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- CN216767743U CN216767743U CN202023280376.2U CN202023280376U CN216767743U CN 216767743 U CN216767743 U CN 216767743U CN 202023280376 U CN202023280376 U CN 202023280376U CN 216767743 U CN216767743 U CN 216767743U
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Abstract
The utility model discloses a high-pressure internal gear pump with a new structure, which comprises a pump body and a pump cover which are fixed through bolts, wherein the inner side of the pump body is a cylindrical surface, an O-shaped ring is arranged between the pump body and the pump cover, an oil inlet and an oil outlet are arranged on the pump cover, a front axial clearance compensation structure and a rear axial clearance compensation structure are respectively arranged between the pump body and a gear shaft and between the pump cover and the gear shaft, the gear shaft is supported through a small shaft sleeve, a framework oil seal is arranged between the gear shaft at the front end of the small shaft sleeve and the pump body, a hole check ring is arranged in a hole of the pump body at the front side of the framework oil seal, the framework oil seal is blocked through the hole check ring, a large shaft sleeve for supporting a gear ring is arranged in the pump body, a radial clearance compensation structure, a high-pressure area and a low-pressure area are also arranged between the gear shaft and the gear ring, the high-pressure area is communicated with the oil outlet, and the low-pressure area is communicated with the oil inlet. The pump body structure is simple in structure and reasonable in design, requirements for materials of the pump body are lowered through the structure, machining amount is reduced, and machining cost is lowered.
Description
Technical Field
The utility model relates to a hydraulic pump, in particular to a high-pressure internal gear pump with a novel structure.
Background
The existing internal gear pump shell consists of 5 parts, namely a connecting disc 1, a front cover 2, a middle body 3, a rear cover 4 and an end cover 5. And the oil inlet and outlet is designed on the intermediate body 3, the intermediate body is processed with a hydraulic oil cavity, 1-2 discharge oil holes are designed on the gear ring, and the number of the discharge holes is the same as the number of the gear teeth. The internal gear pump in the prior art has the following problems:
1. the structural shell has a plurality of parts, and oil cavities in the intermediate body and 1 or 2 rows of holes in the gear ring need to be machined, so that the machining cost is high.
2. Burrs are easily generated on the matching surface of the intermediate body and the gear ring due to the processing interface, and if the burrs are not removed cleanly, the gear ring and the intermediate body can be abraded.
3. The intermediate body is used as a sliding bearing and needs to bear a large load of the gear ring due to high pressure, the intermediate body is made of cast iron or forged aluminum at present, the bearing capacity is poor, and the gear ring and the intermediate body are abraded and fail due to overhigh pressure of the hydraulic pump.
Disclosure of Invention
In order to solve the problems, the utility model provides a high-pressure internal gear pump which is low in processing cost and long in service life.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
the utility model relates to a high-pressure internal gear pump with a novel structure, which comprises a pump body and a pump cover which are fixed by bolts, wherein the inner side of the pump body is a cylindrical surface, an O-shaped ring is arranged between the pump body and the pump cover, an oil inlet and an oil outlet are arranged on the pump cover, a front axial clearance compensation structure and a rear axial clearance compensation structure are respectively arranged between the pump body and the gear shaft and between the pump cover and the gear shaft, the gear shaft is supported by a small shaft sleeve, a skeleton oil seal is arranged between the gear shaft at the front end of the small shaft sleeve and the pump body, a check ring for holes is arranged in the hole of the pump body at the front side of the skeleton oil seal, the skeleton oil seal is blocked by the check ring for holes, the large shaft sleeve supporting the gear ring is arranged in the pump body, a radial clearance compensation structure, a high-pressure area and a low-pressure area are further arranged between the gear shaft and the gear ring, the high-pressure area is communicated with the oil outlet, the low-pressure area is communicated with the oil inlet, and the front axial clearance compensation structure and the rear axial clearance compensation structure are respectively arranged on two axial sides of the high-pressure area.
The utility model is further improved in that: an oil inlet chamfer part is arranged on the pump cover at the front end of the oil inlet, and an oil outlet chamfer part is arranged on the pump cover at the end part of the oil outlet.
The utility model is further improved in that: the front axial clearance compensation structure comprises a front axial compensation plate arranged between the gear shaft and the pump body, a front plastic pad is arranged between the front axial compensation plate and the pump body, and a sealing pad is arranged between the front plastic pad and the pump body.
The utility model is further improved in that: the rear axial clearance compensation structure comprises a rear axial compensation plate arranged between the gear shaft and the pump cover, a rear plastic pad is arranged between the rear axial compensation plate and the pump cover, and a sealing pad is arranged between the rear plastic pad and the pump cover.
The utility model is further improved in that: and a plurality of oil outlet holes are formed in the rear axial compensation plate.
The utility model is further improved in that: the radial clearance compensation structure comprises an oil distribution plate frame, a large spring piece, an oil distribution plate, a small spring piece, a sealing rod and a stop pin, wherein the oil distribution plate frame is matched with the addendum circle of a gear shaft to form a sealing surface, the oil distribution plate is matched with the addendum circle of the gear ring to form a sealing surface, the sealing rod is filled between the oil distribution plate frame and a gap between the oil distribution plate frame and the oil distribution plate, and the cylindrical sealing rod is tangent to the oil distribution plate and the oil distribution plate frame to form a sealing surface.
The utility model is further improved in that: and a stop pin hole for the stop pin to pass through is formed in the rear axial compensation plate, and a stop pin mounting hole corresponding to the stop pin hole is formed in the pump cover.
The utility model has the beneficial effects that: the pump shell of the high-pressure internal gear pump is formed by only two parts instead of five traditional parts, so that the number of parts is reduced, the processing amount is reduced, and the manufacturing cost is reduced. The large shaft sleeve and the small shaft sleeve are embedded in the pump body, so that the bearing capacity of the gear ring is improved through the large shaft sleeve, the gear ring is prevented from being in direct contact with the pump body, and the service life of the pump body is prolonged. Through the setting of big axle sleeve and little axle sleeve, reduced the requirement to the pump body material, can adopt cast aluminium or cast iron material, direct casting shaping reduces the processingquantity. The oil inlet and the oil outlet are arranged on the pump cover, so that the processing of the shape of an oil cavity of the pump body is reduced, the processing cost is reduced, the side surface of the pump body is less in oil cavity, meanwhile, the wall thickness of the pump body can be reduced, the material usage amount is reduced, and the cost is further reduced. And the cylindrical surface of the side surface of the pump body does not need a deburring process. Through the structure of the utility model, an oil discharge port does not need to be processed on the gear ring, thereby further reducing the processing cost.
The pump body structure is simple in structure and reasonable in design, requirements for pump body materials are lowered through the structure, machining amount is reduced, and machining cost is lowered.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic view of the interior of the pump body of the present invention.
FIG. 3 is a schematic view of a rear axial compensation plate.
Fig. 4 is a prior art hydraulic pump.
Fig. 5 is a cross-sectional view of the hydraulic pump of fig. 4.
Wherein: 1-pump body, 2-big shaft sleeve, 3-gear ring, 4-gear shaft, 5-O-shaped ring, 6-pump cover, 6-1-oil inlet, 6-2-oil inlet chamfer, 6-3-oil outlet, 6-4-oil outlet chamfer, 7-small shaft sleeve, 8-sealing gasket, 9-rear plastic pad, 10-rear axial compensation plate, 11-front axial compensation, 12-front plastic pad, 13-framework oil seal, 14-hole check ring, 15-stop pin, 16-oil distribution disc, 17-sealing rod, 18-small spring plate, 19-big spring plate, 20-oil distribution disc frame and 21-bolt.
Detailed Description
For the purpose of enhancing an understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
As shown in figures 1-5, the utility model is a new structure high pressure internal gear pump, comprising a pump body 1 and a pump cover 6 fixed by a bolt 21, the inner side of the pump body 1 is a cylindrical surface, an O-shaped ring 5 is arranged between the pump body 1 and the pump cover 6, an oil inlet 6-1 and an oil outlet 6-3 are arranged on the pump cover 6, a front axial clearance compensation structure and a rear axial clearance compensation structure are respectively arranged between the pump body 1 and a gear shaft 4 and between the pump cover 6 and the gear shaft 4, the gear shaft 4 is supported by a small shaft sleeve 7, a framework oil seal is arranged between the gear shaft 4 at the front end of the small shaft sleeve 7 and the pump body 1, a hole check ring is arranged in a hole of the pump body 1 at the front side of the framework oil seal, the framework oil seal is blocked by the hole check ring, a large shaft sleeve 2 for supporting the gear ring 3 is arranged in the pump body 1, a radial clearance compensation structure is also arranged between the gear shaft 4 and the gear ring 3, A high pressure area and a low pressure area, wherein the high pressure area is communicated with the oil outlet 6-3, and the low pressure area is communicated with the oil inlet 6-1. Wherein, little axle sleeve 7 and big axle sleeve 2 adopt wear-resisting, smooth material to make, can use the sliding bearing material commonly used, and the preferred use takes the sliding bearing on PTFE picture layer, through the setting of big axle sleeve 2 and little axle sleeve 7, can extend the life of gear shaft 4 and ring gear 3, can improve the bearing capacity to the ring gear through big axle sleeve 2, avoids ring gear and pump body direct contact, causes pump body wearing and tearing.
An oil inlet chamfer 6-2 is arranged on the pump cover 6 at the front end of the oil inlet 6-1, and an oil outlet chamfer 6-4 is arranged on the pump cover 6 at the end part of the oil outlet 6-3. The oil inlet 6-1 shaft and the oil outlet 6-3 shaft are axially parallel to the pump body 1, the oil inlet 6-1 and the oil outlet 6-3 can be in flange connection or threaded connection, the threaded connection is adopted in the embodiment, and the conical sealing effect is achieved through the arrangement of the oil inlet chamfer 6-2 and the oil outlet chamfer 6-4.
Preceding axial clearance compensation structure and back axial clearance compensation structure set up respectively in the both sides of high-pressure district, and preceding axial clearance compensation structure is including setting up the preceding axial compensation plate 11 between gear shaft 4 and the pump body 1, and axial compensation plate 11 is provided with preceding plastic pad 12 between the pump body 1 in the front, is provided with sealed the pad 8 in the front between plastic pad 12 and the pump body 1. The rear axial clearance compensation structure comprises a rear axial compensation plate 10 arranged between the gear shaft 4 and the pump cover 6, a rear plastic pad 9 is arranged between the rear axial compensation plate 10 and the pump cover 6, and a sealing pad 8 is arranged between the rear plastic pad 9 and the pump cover 6. A plurality of oil outlet holes are arranged on the rear axial compensation plate 10. The rear plastic pad 9 and the front plastic pad 12 both play a supporting role to prevent the sealing gasket 8 from extruding out of a gap under high pressure and sealing failure, the rear axial compensation plate 10 and the front axial compensation plate 11 both play a role in axial gap compensation, and an oil outlet hole arranged on the rear axial compensation plate 10 is connected with an oil outlet on the pump body 1, a high-pressure cavity on the pump cover 6 and an oil outlet 6-3 on the pump cover 6. And the area of the high-pressure cavity in the pump cover 6 or the pump body 1 is designed to be larger than the high-pressure area of the joint surface of the pump cover 1 or the pump body 1 and the gear shaft 4, and the rear axial compensation plate 10 or the front axial compensation plate 11 is pressed towards the gear shaft 4 under hydraulic pressure.
The radial clearance compensation structure comprises an oil distribution plate frame 20, a large spring piece 19, an oil distribution plate 16, a small spring piece 18, a sealing rod 17 and a stop pin 15, wherein the oil distribution plate frame 20 is matched with the addendum circle of the gear shaft 4 to form a sealing surface, the oil distribution plate 16 is matched with the addendum circle of the gear ring 3 to form a sealing surface, the sealing rod 17 is filled between a gap between the oil distribution plate frame 20 and the oil distribution plate 16, and the cylindrical sealing rod 17 is tangent to the oil distribution plate 16 and the oil distribution plate frame 20 to form a sealing surface. The action of the large spring leaf 19 ensures that the oil distribution disc 16 and the oil distribution disc rack 20 are attached to two addendum circles, and the action of the small spring leaf 18 ensures that the sealing rod 17 is contacted with the oil distribution disc 16 and the oil distribution disc rack 20, so that the sealing reliability is ensured. And through the design of seal rod 17 position, guarantee to join in marriage the hydraulic pressure between oil pan 16 and the oil pan frame 20 and be greater than the hydraulic pressure between addendum circle and the oil pan 16 of joining in marriage or join in marriage the oil pan frame 20 all the time, guarantee that radial seal is reliable. Wherein the high pressure zone and the low pressure zone are separated by a sealing surface of the radial clearance compensation structure.
The utility model can be set to rotate clockwise or anticlockwise, and the two rotation modes only need to arrange the oil inlet 6-1 and the oil outlet 6-3 as well as the high pressure area and the low pressure area in a mirror image mode. Fig. 1 and 2 correspond to a counterclockwise rotating hydraulic pump. When the gear shaft 4 rotates anticlockwise, the gear shaft 4 on the low-pressure area side is separated from the teeth of the gear ring 3, the volume of the position is increased, negative pressure is generated, and hydraulic oil can be sucked into the low-pressure cavity of the hydraulic pump from the oil inlet. The clearance between the gear shaft 4 and the teeth on the ring gear 3 is constantly pumping hydraulic oil from the low pressure region to the high pressure region as the gear shaft 4 rotates. At the meshing position of the gear shaft 4 and the gear ring 3 in the high-pressure area, two teeth are gradually close to each other, the volume is reduced, and high pressure is generated. High-pressure hydraulic oil is pumped from the high-pressure area to the hydraulic system through the rear axial compensation plate 10 and the pump cover 6 in sequence.
The pump body structure is simple in structure and reasonable in design, requirements for materials of the pump body are lowered through the structure, machining amount is reduced, and machining cost is lowered.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The utility model provides a new construction high pressure crescent gear pump, includes the pump body (1) and pump cover (6) fixed through bolt (21), the inboard of the pump body (1) is the drum face be provided with O type circle (5), its characterized in that between the pump body (1) and pump cover (6): an oil inlet (6-1) and an oil outlet (6-3) are arranged on the pump cover (6), a front axial clearance compensation structure and a rear axial clearance compensation structure are respectively arranged between the pump body (1) and the gear shaft (4) and between the pump cover (6) and the gear shaft (4), the gear shaft (4) is supported by a small shaft sleeve (7), a framework oil seal is arranged between the gear shaft (4) at the front end of the small shaft sleeve (7) and the pump body (1), a hole check ring is arranged in a hole of the pump body (1) at the front side of the framework oil seal, the framework oil seal is blocked by the hole check ring, a large shaft sleeve (2) supporting the gear ring (3) is arranged in the pump body (1), a radial clearance compensation structure, a high pressure area and a low pressure area are also arranged between the gear shaft (4) and the gear ring (3), the high-pressure area is communicated with the oil outlet (6-3), the low-pressure area is communicated with the oil inlet (6-1), and the front axial clearance compensation structure and the rear axial clearance compensation structure are respectively arranged on two axial sides of the high-pressure area.
2. The high-pressure internal gear pump of claim 1, wherein: an oil inlet chamfer part (6-2) is arranged on the pump cover (6) at the front end of the oil inlet (6-1), and an oil outlet chamfer part (6-4) is arranged on the pump cover (6) at the end part of the oil outlet (6-3).
3. The high-pressure internal gear pump of claim 1, wherein: preceding axial clearance compensation structure is including setting up gear shaft (4) with preceding axial compensation plate (11) between the pump body (1) preceding axial compensation plate (11) in be provided with preceding plastic pad (12) between the pump body (1) preceding plastic pad (12) with be provided with sealed pad (8) between the pump body (1).
4. A new construction high pressure crescent gear pump, in accordance with claim 3, wherein: the rear axial clearance compensation structure comprises a rear axial compensation plate (10) arranged between the gear shaft (4) and the pump cover (6), a rear plastic pad (9) is arranged between the rear axial compensation plate (10) and the pump cover (6), and a sealing pad (8) is arranged between the rear plastic pad (9) and the pump cover (6).
5. The high-pressure internal gear pump of claim 4, wherein: and a plurality of oil outlet holes are formed in the rear axial compensation plate (10).
6. A new construction high pressure crescent gear pump, according to claim 5, wherein: the radial clearance compensation structure comprises an oil distribution plate frame (20), a large spring piece (19), an oil distribution plate (16), a small spring piece (18), a sealing rod (17) and a stop pin (15), wherein the oil distribution plate frame (20) is matched with the addendum circle of a gear shaft (4), the oil distribution plate (16) is matched with the addendum circle of a gear ring (3), the sealing rod (17) is filled between a gap between the oil distribution plate frame (20) and the oil distribution plate (16), and the cylindrical sealing rod (17) is tangent to the oil distribution plate (16) and the oil distribution plate frame (20).
7. The high-pressure internal gear pump of claim 6, wherein: the rear axial compensation plate (10) is provided with a stop pin hole for the stop pin (15) to pass through, and the pump cover (6) is provided with a stop pin mounting hole corresponding to the stop pin hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023280376.2U CN216767743U (en) | 2020-12-30 | 2020-12-30 | High-pressure internal gear pump with novel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023280376.2U CN216767743U (en) | 2020-12-30 | 2020-12-30 | High-pressure internal gear pump with novel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216767743U true CN216767743U (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023280376.2U Active CN216767743U (en) | 2020-12-30 | 2020-12-30 | High-pressure internal gear pump with novel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216767743U (en) |
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2020
- 2020-12-30 CN CN202023280376.2U patent/CN216767743U/en active Active
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