CN214145879U

CN214145879U - External gear pump of noise at bottom of high efficiency

Info

Publication number: CN214145879U
Application number: CN202023008995.6U
Authority: CN
Inventors: 毕长虹
Original assignee: Hefei Saiyuan Hydraulic Components Co ltd
Current assignee: Hefei Saiyuan Hydraulic Components Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-09-07
Anticipated expiration: 2030-12-14

Abstract

The utility model relates to the technical field of gear pumps, specifically disclose an external gear pump of noise at bottom of high efficiency, including the pump body, the axle sleeve that floats, sealing member and neck bush, the axle sleeve that floats includes first axle sleeve and second axle sleeve, the bottom surface of first axle sleeve with the top surface fixed connection of second axle sleeve, the upper surface of first axle sleeve is provided with the seal groove, the sealing member clamps in the seal groove, the first half of neck bush cup joints in the inner chamber of first axle sleeve, the lower half of neck bush cup joints in the inner chamber of second axle sleeve, the edge of first axle sleeve bottom surface is provided with first recess, the edge of second axle sleeve top surface is provided with the second recess, the joint has the sealing washer in the cavity that first recess and second recess constitute; the problem of present external gear pump body inner wall and the floating shaft sleeve contact surface between have the leakage is solved.

Description

External gear pump of noise at bottom of high efficiency

Technical Field

The utility model relates to a gear pump technical field specifically is an external gear pump of noise at bottom of high efficiency.

Background

The hydraulic pump is a power element of a hydraulic system, and is a hydraulic element which is driven by a motor, sucks oil from a hydraulic oil tank, forms pressure oil, discharges the pressure oil and sends the pressure oil to an execution element. The hydraulic pump is divided into a gear pump, a plunger pump, a vane pump and a screw pump according to the structure. Among them, the gear pump is most commonly used.

Gear pumps are rotary pumps that rely on the displacement and displacement of working volumes formed between a pump housing and meshing gears to deliver or pressurize a fluid. Two gears, a pump shell and front and back covers form two closed spaces, when the gears rotate, the volume of the space on the gear disengagement side is changed from small to large to form vacuum, liquid is sucked in, and the volume of the space on the gear engagement side is changed from large to small to squeeze the liquid into the pipeline. The suction chamber and the discharge chamber are separated by a meshing line of two gears. The pressure at the discharge of the gear pump is entirely dependent on the amount of resistance at the pump outlet. The external gear pump has the basic form that two gears with the same size are meshed with each other and rotate in a tightly matched shell, the inside of the shell is similar to a '8' shape, the two gears are arranged in the shell, and the outer diameter and two sides of the gears are tightly matched with the shell. Oil enters between the two gears at the suction port, fills the space, moves along the shell along with the rotation of the teeth and is finally discharged when the two teeth are meshed. Since the oil is difficult to compress, the oil and the teeth cannot occupy the same space at the same time, and thus the oil is discharged. This phenomenon continues to occur due to the constant meshing of the teeth, thus creating a continuous discharge at the outlet of the pump. The amount discharged is the same for each revolution of the pump. With the uninterrupted rotation of the drive shaft, the pump also discharges fluid uninterrupted.

The positions of the inner cavity of the external gear pump, which are positioned at the two sides of the gear, are respectively sleeved with a floating shaft sleeve, but the leakage phenomenon is easily formed at the contact surface of the pump body and the floating shaft sleeve.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to solve the problem that has the leakage between the internal wall of present external gear pump and the axle sleeve contact surface that floats, designed the external gear pump of noise at the bottom of a high efficiency.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an external gear pump of noise at bottom of high efficiency, includes the pump body, the axle sleeve that floats, sealing member and neck bush, the axle sleeve that floats includes half axle sleeve and half axle sleeve down, the bottom surface of half axle sleeve with the top surface fixed connection of half axle sleeve down, the upper surface of half axle sleeve is provided with the seal groove, the sealing member clamps in the seal groove, the first one of neck bush cup joint in the inner chamber of half axle sleeve, the lower half of neck bush cup joint in the inner chamber of half axle sleeve down, the edge of half axle sleeve bottom surface is provided with first recess, the edge of half axle sleeve top surface is provided with the second recess down, first recess with the cavity joint that the second recess is constituteed has the sealing washer.

Preferably, the cross section of the sealing ring is circular, and the outer diameter of the sealing ring is larger than the sum of the depths of the first groove and the second groove in the vertical direction.

Preferably, the lateral depth of the first groove and the second groove is equal to the diameter of the sealing ring.

Preferably, the positions, close to the two ends, of the bottom surface of the inner cavity of the sealing groove are respectively in threaded sleeve joint with a sewing screw in a vertical mode, and the bottom end of the sewing screw is in threaded sleeve joint with the upper surface of the lower half shaft sleeve in a vertical mode.

Preferably, the top surface of the suture screw is flush with the bottom surface of the inner cavity of the sealing groove.

Preferably, a groove is formed in the center of the top surface of the suture screw.

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

the utility model relates to a floating shaft sleeve comprises first axle sleeve and lower axle sleeve coincide, sews up first axle sleeve and second axle sleeve when inseparable, can extrude the sealing washer of edge department to sealed not tight between the axle sleeve lateral wall of having avoided floating and the pump body inner wall, the problem of leakage exists.

Drawings

Fig. 1 is a schematic view of the overall overhead structure of the present invention;

fig. 2 is a schematic top view of the floating bushing of the present invention;

FIG. 3 is a schematic cross-sectional view A-A of FIG. 2 according to the present invention;

fig. 4 is an enlarged schematic structural diagram of the present invention at B in fig. 3.

In the figure: 1-a pump body; 2-floating shaft sleeve; 21-upper half shaft sleeve; 211-sealing groove; 212-a first groove; 22-lower half shaft sleeve; 221-a second groove; 3-a seal; 4-inner liner; 5-sewing the screw rod; 6-sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-4, the utility model provides a technical scheme, a high efficiency noise at the bottom external gear pump, including the pump body 1, the axle sleeve 2 floats, sealing member 3 and neck bush 4, the axle sleeve 2 floats includes first axle sleeve 21 and second axle sleeve 22, the bottom surface of first axle sleeve 21 and the top surface fixed connection of second axle sleeve 22, the upper surface of first axle sleeve 21 is provided with seal groove 211, sealing member 3 clamps in seal groove 211, the first portion cup joints in the inner chamber of first axle sleeve 21 of neck bush 4, the lower half of neck bush 4 cup joints in the inner chamber of second axle sleeve 22, the edge of first axle sleeve 21 bottom surface is provided with first recess 212, the edge of second axle sleeve 22 top surface is provided with second recess 221, the joint has sealing washer 6 in the cavity that first recess 212 and second recess 221 constitute.

In this embodiment, the cross section of the sealing ring 6 is circular, and the outer diameter of the sealing ring 6 is larger than the sum of the vertical depths of the first groove 212 and the second groove 221.

In this embodiment, the lateral depth of the first groove 212 and the second groove 221 is equal to the diameter of the sealing ring 6.

In this embodiment, the positions of the bottom surface of the inner cavity of the sealing groove 211, which are close to the two ends, are respectively and vertically screwed with the sewing screw 5, and the bottom end of the sewing screw 5 is vertically screwed with the upper surface of the lower half shaft sleeve 22.

In this embodiment, the top surface of suture screw 5 is flush with the bottom surface of the cavity of seal groove 211.

In this embodiment, a groove is formed in the center of the top surface of the suture screw 5.

The working principle is as follows: when the floating type axial flow pump is used, the sealing ring 6 is sleeved in the first groove 212 or the second groove 221, then the upper half shaft sleeve 21 and the lower half shaft sleeve 22 are sewn through the sewing screw 5, the upper half shaft sleeve 21 and the lower half shaft sleeve 22 are not completely and tightly attached at the moment, the amplitude shaft sleeve 2 formed by the upper half shaft sleeve 21 and the lower half shaft sleeve 22 is sleeved in the inner cavity of the pump body 1, and after the floating shaft sleeve 2 is installed in place, the sewing screw 5 is further fastened through a screwdriver or an allen wrench, so that the sewing screw 5 is installed in place; the upper half shaft sleeve 21 and the lower half shaft sleeve 22 are tightly attached, and the top surface of the first groove 212 and the bottom surface of the second groove 221 extrude the sealing ring 6, so that the sealing ring 6 is deformed, the side surface of the floating shaft sleeve 2 of the sealing ring 6 is tightly sealed with the inner wall of the pump body 1, and the problem of leakage prevention is solved; at this time, the seal 3 is mounted in the seal groove 211.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an external gear pump of noise at bottom of high efficiency, includes the pump body (1), floats axle sleeve (2), sealing member (3) and interior bush (4), its characterized in that: the utility model discloses a floating shaft sleeve, including floating shaft sleeve (2) and half axle sleeve (22) down, the bottom surface of half axle sleeve (21) with the top surface fixed connection of half axle sleeve (22) down, the upper surface of half axle sleeve (21) is provided with seal groove (211), sealing member (3) clamp in seal groove (211), the first portion cup joint of interior bush (4) in the inner chamber of half axle sleeve (21) down, the lower half of interior bush (4) cup joint in the inner chamber of half axle sleeve (22) down, the edge of half axle sleeve (21) bottom surface is provided with first recess (212), the edge of half axle sleeve (22) top surface is provided with second recess (221) down, first recess (212) with sealing washer (6) are connected to the internal joint of cavity that second recess (221) are constituteed.

2. A low noise, high efficiency external gear pump according to claim 1, wherein: the cross section of the sealing ring (6) is circular, and the outer diameter of the sealing ring (6) is larger than the sum of the vertical depths of the first groove (212) and the second groove (221).

3. A low noise, high efficiency external gear pump according to claim 2, wherein: the transverse depth of the first groove (212) and the second groove (221) is equal to the diameter of the sealing ring (6).

4. A low noise, high efficiency external gear pump according to claim 3, wherein: the positions, close to the two ends, of the bottom surface of the inner cavity of the sealing groove (211) are respectively in threaded sleeve joint with a sewing screw rod (5) in a vertical mode, and the bottom end of the sewing screw rod (5) is in threaded sleeve joint with the upper surface of the lower half shaft sleeve (22) in a vertical mode.

5. A low noise, high efficiency external gear pump according to claim 4, wherein: the top surface of the sewing screw rod (5) is flush with the bottom surface of the inner cavity of the sealing groove (211).

6. A low noise, high efficiency external gear pump according to claim 5, wherein: the middle position of the top surface of the sewing screw rod (5) is provided with a groove.