CN218439734U

CN218439734U - Compact type internal gear oil pump

Info

Publication number: CN218439734U
Application number: CN202222624772.5U
Authority: CN
Inventors: 王斌; 丁云龙
Original assignee: Wuxi Fangsheng Heat Exchanger Corp ltd
Current assignee: Wuxi Fangsheng Heat Exchanger Corp ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-02-03
Anticipated expiration: 2032-09-30

Abstract

The utility model relates to a compact type internal gear oil pump, which belongs to the field of hydraulic gear pumps and comprises a pump body, a gear meshing component and an end cover, wherein the pump body is provided with an inlet, an outlet and a mounting port, the inlet and the outlet are arranged on the same straight line, the mounting port is internally provided with the meshing gear component, and the outer side of the mounting port is provided with the end cover; the gear meshing component comprises an outer rotor and an inner rotor, a plurality of built-in grooves are uniformly distributed in the middle of the outer rotor, a plurality of bulges are uniformly distributed on the outer ring of the inner rotor, the number of the bulges is smaller than that of the built-in grooves, the inner rotor is arranged at the center of the outer rotor, the bulges are meshed with part of the built-in grooves, and a shaft hole connected with the output shaft of the motor is formed in the middle of the inner rotor. The utility model removes the coupling transition between the power end and the gear pump, and improves the reliability and compactness of connection; the maintenance cost is lower, and the universality is stronger; triple seal structure greatly reduced oil leak risk.

Description

Compact type internal gear oil pump

Technical Field

The utility model relates to a compact internal gear oil pump belongs to the hydraulic gear pump field.

Background

In a hydraulic system, hydraulic oil is used for transmitting power and is an indispensable lubricant for a transmission device, the hydraulic oil is heated in work doing and lubricating engineering to take away heat, and a hydraulic oil cooling system is used for cooling and controlling the temperature of the system in a reasonable interval, so that the stable operation of the hydraulic system is guaranteed. The hydraulic oil gear pump provides power for the circulation flow of hydraulic oil.

The traditional gear pump is driven by a transmission shaft and is connected with a power end (a motor) by a coupler, so that the structure size is larger; in addition, the reliability is relatively low because the elastic body of the coupler is a quick-wear part.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned weak point, provide a compact internal gear oil pump, when reducing whole oil pump size, save unstable connecting pieces such as shaft coupling, improve the reliability of oil pump.

According to the technical scheme provided by the utility model, a compact type inner meshing gear oil pump comprises a pump body, a gear meshing component and an end cover, wherein the pump body is provided with an inlet, an outlet and a mounting opening, the inlet and the outlet are arranged on the same straight line, the mounting opening is internally provided with a meshing gear component, and the outer side of the mounting opening is provided with the end cover;

the gear meshing component comprises an outer rotor and an inner rotor, wherein a plurality of built-in grooves are uniformly distributed in the middle of the outer rotor, a plurality of bulges are uniformly distributed on the outer ring of the inner rotor, the number of the bulges is smaller than that of the built-in grooves, the inner rotor is arranged in the center of the outer rotor, the bulges are meshed with part of the built-in grooves, and a shaft hole connected with an output shaft of a motor is formed in the middle of the inner rotor; when the motor output shaft rotates, the inner rotor follows, the protrusion is meshed with part of the built-in groove to drive the outer rotor to rotate, and the working volume change is formed to suck liquid from the inlet and discharge the liquid from the outlet.

As a further improvement, the gear engagement assembly comprises a six-star outer rotor and a five-star inner rotor arranged in the six-star outer rotor, six built-in grooves are formed in the middle of the six-star outer rotor, and five external bulges are uniformly distributed on the outer ring of the five-star outer rotor.

As a further improvement of the utility model, the mounting hole with be provided with O type circle between the end cover.

As a further improvement, the end cover is provided with a through hole for accommodating the output shaft of the motor, and the inner ring of the through hole is provided with an oil seal piece.

As a further improvement of the utility model, a key groove is arranged on the shaft hole.

The beneficial effects of the utility model reside in that:

1) The coupling transition between the power end and the gear pump is removed, and the reliability and compactness of connection are improved;

2) By adopting the standard motor shaft inserted direct-drive mechanism, the motor brand flexibility is better, the maintenance cost is lower, and the universality is stronger.

3) The oil pump end cover and the inner part are sealed by adopting an O-shaped ring, the end cover and the motor output shaft are sealed by adopting an oil seal, the end cover and the motor end surface are sealed by adopting a plane, and the oil leakage risk is greatly reduced by adopting a triple sealing structure.

Drawings

Fig. 1 is an explosion diagram of the whole structure of the utility model.

Fig. 2 is a schematic structural view of the present invention without the end cap.

Description of reference numerals: 1. a pump body; 2. an inlet; 3. an outlet; 4. an installation port; 5. an end cap; 6. an inner rotor; 7. an outer rotor; 8. an O-shaped ring; 9. an oil seal; 51. a through hole; 61. a protrusion; 62. a shaft hole; 63. a keyway; 71. a groove is arranged in the groove.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

as shown in the figure, the compact type internal gear oil pump comprises a pump body 1, a gear meshing component and an end cover 5, wherein an inlet 2, an outlet 3 and a mounting opening 4 are formed in the pump body 1, the inlet 2 and the outlet 3 are arranged on the same straight line, the meshing gear component is arranged in the mounting opening 4, and the end cover 5 is arranged on the outer side of the mounting opening 4;

the gear meshing component comprises an outer rotor 7 and an inner rotor 6, a plurality of built-in grooves 71 are uniformly distributed in the middle of the outer rotor 7, a plurality of protrusions 61 are uniformly distributed on the outer ring of the inner rotor 6, the number of the protrusions 61 is smaller than that of the built-in grooves 71, the inner rotor 6 is arranged in the center of the outer rotor 7, the protrusions 61 are meshed with part of the built-in grooves 71, and a shaft hole 62 connected with an output shaft of a motor is arranged in the middle of the inner rotor 6; when the motor output shaft rotates, the inner rotor 6 follows, the protrusion 61 is meshed with part of the built-in groove 71, the outer rotor 7 is driven to rotate, the working volume change is formed, and liquid is sucked from the inlet 2 and discharged from the outlet 3.

In conventional use, the gear meshing component comprises a six-star outer rotor and a five-star inner rotor arranged in the six-star outer rotor, six built-in grooves 71 are uniformly distributed in the middle of the six-star outer rotor, and five external protrusions 61 are uniformly distributed on the outer ring of the five-star outer rotor, as shown in fig. 2.

An O-shaped ring 8 is arranged between the mounting port 4 and the end cover 5.

The end cover 5 is provided with a through hole 51 for accommodating the output shaft of the motor, and the inner ring of the through hole 51 is provided with an oil seal 9.

The shaft hole 62 is provided with a key groove 63.

The utility model discloses a working process does:

the motor rotates, the output shaft of the motor drives the five-star inner rotor to rotate, the inner rotor drives the six-star outer rotor to rotate, the five-star gear is a driving wheel, the gear exits from the meshing volume to increase and absorb oil during rotation, and enters the meshing volume to decrease and press oil, so that the suction and discharge work of the oil pump is completed.

Claims

1. A compact type internal gear oil pump is characterized by comprising a pump body (1), a gear meshing component and an end cover (5), wherein an inlet (2), an outlet (3) and a mounting opening (4) are formed in the pump body (1), the inlet (2) and the outlet (3) are arranged on the same straight line, the inside of the mounting opening (4) is provided with the gear meshing component, and the outer side of the mounting opening (4) is provided with the end cover (5);

the gear meshing assembly comprises an outer rotor (7) and an inner rotor (6), a plurality of built-in grooves (71) are uniformly distributed in the middle of the outer rotor (7), a plurality of protrusions (61) are uniformly distributed on the outer ring of the inner rotor (6), the number of the protrusions (61) is smaller than that of the built-in grooves (71), the inner rotor (6) is arranged in the center of the outer rotor (7), the protrusions (61) are meshed with part of the built-in grooves (71), and a shaft hole (62) connected with an output shaft of a motor is formed in the middle of the inner rotor (6); when the output shaft of the motor rotates, the inner rotor (6) follows, the protrusion (61) is meshed with part of the built-in groove (71) to drive the outer rotor (7) to rotate, and the change of working volume is formed to suck liquid from the inlet (2) and discharge the liquid from the outlet (3).

2. The compact internal gear oil pump of claim 1, wherein the gear engagement assembly comprises a six-star outer rotor and a five-star inner rotor arranged in the six-star outer rotor, six internal grooves (71) are uniformly distributed in the middle of the six-star outer rotor, and five external protrusions (61) are uniformly distributed on the outer ring of the five-star inner rotor.

3. A compact ring gear oil pump according to claim 1, wherein an O-ring (8) is provided between the mounting port (4) and the end cap (5).

4. A compact ring gear oil pump according to claim 1, wherein the end cover (5) is provided with a through hole (51) for receiving an output shaft of the motor, and an inner ring of the through hole (51) is provided with an oil seal (9).

5. A compact ring gear oil pump according to claim 1, wherein a key groove (63) is provided in the shaft hole (62).