CN216278447U

CN216278447U - Internal gear pump

Info

Publication number: CN216278447U
Application number: CN202122587288.5U
Authority: CN
Inventors: 邵星
Original assignee: Wuxi Dongye Machinery Manufacturing Co ltd
Current assignee: Wuxi Dongye Machinery Manufacturing Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-04-12
Anticipated expiration: 2031-10-26

Abstract

The utility model relates to the technical field of hydraulic transmission, in particular to an internal gear pump, which comprises a pump body, a rotating shaft, an internal gear, an external gear and connecting pieces, wherein the outer surface of the pump body is provided with an oil inlet and an oil outlet at two sides respectively; according to the utility model, the two groups of gears are arranged in an inner meshing manner, so that the connecting piece can be matched with the inner wall of the pump body, particles in a medium can not be ground in the rotating process of the connecting piece, the abrasion on the surface of the connecting piece is reduced, and the service life of the gear pump is prolonged.

Description

Internal gear pump

Technical Field

The utility model relates to the technical field of hydraulic transmission, in particular to an internal gear pump.

Background

At present, the kinetic energy of an engine or a motor can be converted into hydraulic energy by using a gear pump, when a gear rotates, the volume of a space on a gear disengagement side is increased from small to large to form vacuum, liquid is sucked, and the volume of a space on a gear engagement side is decreased from large to small to squeeze the liquid into a pipeline.

However, the existing gear pump is only suitable for conveying clean media with certain lubricity, and when heavy oil, residual oil and coal tar containing a large amount of abrasive particles (mechanical impurities) are conveyed at medium pressure, the connecting pieces of the gears can grind the particles when meshed with each other, so that the abrasion on the surfaces of the gears is accelerated, and the service life of the gear pump is shortened.

To this end, a ring gear pump is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an internal gear pump, which mainly solves the problems that when heavy oil, residual oil and coal tar containing a large amount of abrasive particles (mechanical impurities) are conveyed at medium pressure, connecting pieces of gears can grind the particles when being meshed with each other, and the heating on the surfaces of the gears can be accelerated by long-time high-speed rotation, so that the abrasion on the surfaces of the gears is accelerated, and the service life of the gear pump is shortened.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an internal gear pump, includes the pump body, pivot, internal gear, external gear, connecting piece, oil inlet and oil-out, the inside of the pump body rotates through the bearing and is connected with the pivot, the outer fixed surface of pivot is connected with the internal gear, the surface meshing of internal gear has the external gear, the even welding of surface annular of external gear has the multiunit connecting piece, the surface of the pump body just is located both sides and is provided with oil inlet and oil-out respectively.

When a medium enters the pump body from the oil inlet, the rotating shaft can be driven by the motor to rotate, then the rotating shaft drives the inner gear to rotate, and then the outer surface of the inner gear is meshed with the outer gear, so that the outer gear can drive the connecting piece to rotate in the rotating process, and then the medium at the oil inlet is conveyed out through the oil outlet by the connecting piece through extrusion force, so that particles in the medium cannot be ground by the connecting piece in the rotating process, the abrasion on the surface of the connecting piece is reduced, and the service life of the gear pump is prolonged; meanwhile, the load of the motor can be reduced through the mutual conversion between the two groups of gears, and the active current of the motor can be reduced due to the reduction of the load, so that the motor has certain energy-saving and power-saving effects.

Preferably, one end of the connecting piece close to the inner wall of the shell is provided with a groove, and an elastic sealing strip is fixedly connected in the groove.

The sealing performance between two adjacent connecting pieces can be enhanced, and a certain buffer effect can be achieved.

Preferably, one side of the elastic sealing strip close to the inner wall of the pump body is fixedly connected with a protective cover.

The pump body can protect the elastic sealing strip, and impact damage to the surface of the elastic sealing strip caused by the medium in the pump body in the flowing process is reduced.

Preferably, the surface of connecting piece just is located both sides and has seted up multiunit T type groove, sliding connection has T type piece in the T type groove, the one end that T type piece is close to pump body inner wall is connected with the lower fixed surface of protection casing.

The telescopic protective cover is used for fixing the protective cover, so that the protective cover and the connecting piece can be telescopically changed.

Preferably, a spring is vertically arranged in the T-shaped groove, one end of the spring is fixedly connected with the bottom end of the T-shaped groove, and the other end of the spring is fixedly connected with the bottom end of the T-shaped block.

The protective cover can play a certain role in buffering and damping.

Preferably, the outer surface of the protective cover and one side close to the inner wall of the pump body are arranged to be of an arc-shaped structure.

The protection casing of being convenient for closely laminates with the pump body inner wall, strengthens the leakproofness to, can reduce the wearing and tearing between protection casing and the pump body inner wall.

Preferably, the protective cover is made of a wear-resistant material.

The service life of the protective cover can be prolonged.

Preferably, the meshing position of the external gear and the internal gear is filled with cooling liquid.

The pinion rack that can external gear and internal gear plays cooling and lubrication's effect, prevents that long-time high-speed rotation from accelerating the gear surface and generating heat for gear surface takes place to warp, thereby can reduce the wearing and tearing on gear surface, simultaneously, can reduce the loss because of gear surface high temperature causes the transport medium, improves transport efficiency.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the two groups of gears are arranged to be meshed in an inner manner, so that the connecting piece can be matched with the inner wall of the pump body, particles in a medium cannot be ground in the rotating process of the connecting piece, the abrasion to the surface of the connecting piece is reduced, and the service life of the gear pump is prolonged; meanwhile, the load of the motor can be reduced through the mutual conversion between the two groups of gears, and the active current of the motor can be reduced due to the reduction of the load, so that the motor has certain energy-saving and power-saving effects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic cross-sectional view of a gear pump of the present invention;

FIG. 2 is a schematic view of the combination structure of the connecting member and the protective cover of FIG. 1;

FIG. 3 is an enlarged view of the position A of FIG. 2 according to the present invention.

In the figure: the oil pump comprises a pump body 1, a rotating shaft 2, an internal gear 3, an external gear 4, a connecting piece 5, a groove 51, a T-shaped groove 52, an elastic sealing strip 6, a T-shaped block 7, a spring 8, a protective cover 9, an oil inlet 10 and an oil outlet 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution:

the utility model provides an internal gear pump, including the pump body 1, pivot 2, internal gear 3, outer gear 4, connecting piece 5, oil inlet 10 and oil-out 11, the inside of the pump body 1 is rotated through the bearing and is connected with pivot 2, the outer fixed surface of pivot 2 is connected with internal gear 3, the surface meshing of internal gear 3 has outer gear 4, the even welding of surface annular of outer gear 4 has multiunit connecting piece 5, the surface of the pump body 1 just is located both sides and is provided with oil inlet 10 and oil-out 11 respectively.

When a medium enters the pump body 1 from the oil inlet 10, the rotating shaft 2 can be driven to rotate by the motor, then the rotating shaft 2 drives the inner gear 3 to rotate, and then the outer gear 4 is meshed with the outer surface of the inner gear 3, so that the outer gear 4 can drive the connecting piece 5 to rotate in the rotating process, and then the connecting piece 5 conveys the medium at the oil inlet 10 out through the oil outlet 11 by extrusion force, so that the connecting piece 5 cannot grind particles in the medium in the rotating process, the abrasion on the surface of the connecting piece 5 is reduced, and the service life of the gear pump is prolonged; meanwhile, the load of the motor can be reduced through the mutual conversion between the two groups of gears, and the active current of the motor can be reduced due to the reduction of the load, so that the motor has certain energy-saving and power-saving effects.

As an embodiment of the utility model, one end of the connecting piece 5 close to the inner wall of the shell is provided with a groove 51, and an elastic sealing strip 6 is fixedly connected in the groove 51.

The sealing performance between two adjacent connecting pieces 5 can be enhanced, and a certain buffer function can be achieved.

As an embodiment of the present invention, a protective cover 9 is fixedly connected to one side of the elastic sealing strip 6 close to the inner wall of the pump body 1.

The elastic sealing strip 6 can be protected, and impact damage to the surface of the elastic sealing strip 6 caused by the medium in the pump body 1 in the flowing process is reduced.

As an embodiment of the utility model, a plurality of groups of T-shaped grooves 52 are formed on the outer surface and two sides of the connecting piece 5, T-shaped blocks 7 are connected in the T-shaped grooves 52 in a sliding mode, and one ends, close to the inner wall of the pump body 1, of the T-shaped blocks 7 are fixedly connected with the lower surface of the protective cover 9.

For fixing the protecting cover 9 so that the protecting cover 9 and the connecting piece 5 can be telescopically changed.

As an embodiment of the utility model, a spring 8 is vertically arranged in the T-shaped groove 52, one end of the spring 8 is fixedly connected with the bottom end of the T-shaped groove 52, and the other end of the spring 8 is fixedly connected with the bottom end of the T-shaped block 7.

The protective cover 9 can be cushioned to a certain extent.

As an embodiment of the present invention, the outer surface of the shield 9 and the side close to the inner wall of the pump body 1 are provided with an arc-shaped structure.

The protection casing 9 of being convenient for closely laminates with the pump body 1 inner wall, strengthens the leakproofness to, can reduce the wearing and tearing between protection casing 9 and the pump body 1 inner wall.

In one embodiment of the present invention, the material of the protection mask 9 is a wear-resistant material.

The service life of the protection cover 9 can be improved.

In one embodiment of the present invention, the meshing portion between the external gear 4 and the internal gear 3 is filled with a coolant.

Can play cooling and lubrication's effect to external gear 4 and the pinion rack of internal gear 3, prevent that long-time high-speed rotation from accelerating the generating heat on gear surface for gear surface takes place to warp, thereby can reduce the wearing and tearing on gear surface, simultaneously, can reduce because of the loss that gear surface temperature is too high to the transport medium causes, improve conveying efficiency.

The working principle is as follows: when a medium enters the pump body 1 from the oil inlet 10, the rotating shaft 2 can be driven to rotate by the motor, then the rotating shaft 2 drives the inner gear 3 to rotate, and then the outer gear 5 is meshed with the outer surface of the inner gear 3, so that the outer gear 5 can drive the connecting piece 5 to rotate in the rotating process, and then the connecting piece 5 conveys the medium at the oil inlet 10 out through the oil outlet 11 by extrusion force, so that the connecting piece 5 cannot grind particles in the medium in the rotating process, the abrasion on the surface of the connecting piece 5 is reduced, and the service life of the gear pump is prolonged; meanwhile, the load of the motor can be reduced through the mutual conversion between the two groups of gears, and the active current of the motor can be reduced due to the reduction of the load, so that the motor has certain functions of energy conservation and power conservation;

when the medium in the pump body 1 extrudes the protective cover 9, the protective cover 9 begins to extrude the elastic sealing strip 6, so that the elastic sealing strip 6 plays a certain buffering role on the protective cover 9, and meanwhile, the protective cover 9 drives the T-shaped block 7 to downwards slide along the inner wall of the T-shaped groove 52 to extrude the spring 8, so that the buffering role can be further played.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an internal gear pump, includes the pump body (1), pivot (2), internal gear (3), external gear (4), connecting piece (5), oil inlet (10) and oil-out (11), its characterized in that: the utility model discloses a pump, including the pump body, the inside of the pump body (1) rotates through the bearing and is connected with pivot (2), the fixed surface of pivot (2) is connected with internal gear (3), the surface meshing of internal gear (3) has outer gear (4), the even welding of surface annular of outer gear (4) has multiunit connecting piece (5), the surface of the pump body (1) just is located both sides and is provided with oil inlet (10) and oil-out (11) respectively.

2. A crescent gear pump as set forth in claim 1 wherein: one end of the connecting piece (5) close to the inner wall of the shell is provided with a groove (51), and an elastic sealing strip (6) is fixedly connected in the groove (51).

3. A crescent gear pump as set forth in claim 2 wherein: one side of the elastic sealing strip (6) close to the inner wall of the pump body (1) is fixedly connected with a protective cover (9).

4. A crescent gear pump as set forth in claim 3 wherein: the surface of connecting piece (5) just is located both sides and has seted up multiunit T type groove (52), sliding connection has T type piece (7) in T type groove (52), the one end that T type piece (7) are close to pump body (1) inner wall is connected with the lower fixed surface of protection casing (9).

5. A crescent gear pump according to claim 4, wherein: the T-shaped groove (52) is internally and vertically provided with a spring (8), one end of the spring (8) is fixedly connected with the bottom end of the T-shaped groove (52), and the other end of the spring (8) is fixedly connected with the bottom end of the T-shaped block (7).

6. A crescent gear pump as set forth in claim 3 wherein: the outer surface of the protective cover (9) and one side close to the inner wall of the pump body (1) are arranged to be of an arc-shaped structure.

7. A crescent gear pump as set forth in claim 3 wherein: the protective cover (9) is made of wear-resistant materials.

8. A crescent gear pump as set forth in claim 1 wherein: and the meshing part of the external gear (4) and the internal gear (3) is filled with cooling liquid.