CN216714622U

CN216714622U - Variable plunger pump

Info

Publication number: CN216714622U
Application number: CN202123452162.3U
Authority: CN
Inventors: 杜国领; 王运梅; 陈乃环; 毛锋锋
Original assignee: Heitek Power Co ltd
Current assignee: Heitek Power Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-10
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a variable plunger pump, which comprises a pump body, wherein a driving through groove is formed on the pump body, a driving shaft is rotatably penetrated in the driving through groove, the driving through groove comprises a sealing part and a connecting part, the driving shaft is provided with a connecting bearing corresponding to the connecting part, the driving through groove is provided with a retainer ring at the sealing part, the retainer ring is fixedly connected with the pump body, a first framework and a second framework are arranged between the retainer ring and the driving shaft, the first framework is arranged on one side far away from the connecting shaft, one end of the first framework is fixedly connected with the inner wall of the retainer ring, the other end of the first framework extends towards the driving shaft, be provided with the retaining lip on the first skeleton, second skeleton one end and retaining ring inner wall fixed connection, the other end extends the setting to the drive shaft, still be provided with the hoop on the second skeleton, the second skeleton outside is provided with the seal lip. The sealing structure is simple and reasonable, has better sealing and leakage-proof effects, and improves the reliability of the whole structure.

Description

Variable plunger pump

Technical Field

The utility model relates to the technical field of pump valves, in particular to a variable plunger pump.

Background

Variable displacement piston pumps are an important device of hydraulic systems. The main working principle is that a motor drives a main pump transmission shaft to rotate, so that a plunger is driven to reciprocate in a cylinder body to complete oil absorption and oil discharge processes. The output flow is proportional to the driving speed and can be varied steplessly between a maximum value and a zero value. The lifting system is mainly applied to a lifting system of engineering machinery at present. It has the characteristics of convenient adjustment, stable output and the like. However, when the existing variable plunger pump is used, the situation that the sealing effect is not good easily occurs at the position of a driving shaft, so that the situation that internal oil leaks is caused, and the using effect and the using reliability of the whole structure are reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a variable plunger pump which is simple and reasonable in structure, has a better sealing and leakage-proof effect, and improves the use reliability of the whole structure.

In order to achieve the above purpose, the present invention provides a variable displacement plunger pump, which comprises a pump body, wherein a driving through groove is formed on the pump body, a driving shaft is rotatably inserted into the driving through groove, the driving through groove comprises a sealing portion and a connecting portion, a connecting bearing is arranged at a position of the driving shaft corresponding to the connecting portion of the driving through groove, a retaining ring is arranged at the sealing position of the driving through groove, the retaining ring is fixedly connected with the pump body, the retaining ring is arranged on the connecting bearing in an abutting manner, a sealing assembly is arranged between the retaining ring and the driving shaft, the sealing assembly comprises a first framework and a second framework, the first framework is arranged at a side far away from the connecting shaft, one end of the first framework is fixedly connected with the inner wall of the retaining ring, the other end of the first framework extends towards the driving shaft, a retaining lip is arranged on the first framework, one end of the second framework is fixedly connected with the inner wall of the retaining ring, the other end of the second framework extends towards the driving shaft and forms a bend on the driving shaft, the second framework is provided with a hoop sleeve at the bending position, and a sealing lip is arranged on the outer side of the second framework.

The beneficial effect who so sets up is: set up like this, adopt this kind of structure can effectively improve the leakproofness, retaining ring structure is convenient for demolish simultaneously, thereby improve and overhaul maintenance efficiency, while simple structure, good result of use has, further pass through the seal assembly structure, effectively seal, through two skeletons, can constitute the seal structure of returning the font, reduce the possibility of seepage, be provided with the hoop on the second skeleton simultaneously, can guarantee the stable in position of second skeleton, guarantee that the seal lip on the skeleton can contradict in the drive shaft, guarantee sealed stability, better sealed leak protection effect has, the reliability that overall structure used improves.

As a further arrangement of the utility model, the second framework is also provided with a support arm extending towards the first framework, and the support arm is arranged on the inner side wall of the first framework in an abutting mode.

The beneficial effect who so sets up is: effectively improve the stability of first skeleton position, simple structure simultaneously, it is convenient to constitute, and overall stability is strong, still is formed with the seal structure of returning the word between first skeleton and second skeleton through the support arm simultaneously, further improvement leakproofness

As a further arrangement of the present invention, a rib is further formed at one bent end of the second framework.

The beneficial effect who so sets up is: set up the flange like this, avoid the hoop pine to take off and run out, improve overall structure's stability.

As a further arrangement of the utility model, a clamping groove is arranged at the position of the pump body corresponding to the retainer ring, an elastic pressing ring is arranged in the clamping groove, and the elastic pressing ring is abutted against the retainer ring.

The beneficial effect who so sets up is: effectively guarantee the stable position of retaining ring, difficult emergence pine takes off, keeps overall structure's result of use, and simple structure does benefit to the realization simultaneously.

Drawings

FIG. 1 is a schematic overall cross-sectional structure of an embodiment of the present invention;

fig. 2 is a partially enlarged view of a portion a in fig. 1 according to an embodiment of the present invention.

Detailed Description

The embodiment of the variable displacement pump of the present invention is shown in fig. 1 to 2: the pump comprises a pump body 1, a driving through groove is formed in the pump body 1, a driving shaft 2 penetrates through the driving through groove in a rotating mode, the driving through groove comprises a sealing portion and a connecting portion, a connecting bearing 3 is arranged at a position, corresponding to the driving through groove connecting portion, of the driving shaft 2, a retaining ring 4 is arranged at the sealing portion of the driving through groove, the retaining ring 4 is fixedly connected with the pump body 1, the retaining ring 4 is abutted to the connecting bearing 3, a sealing assembly is arranged between the retaining ring 4 and the driving shaft 2 and comprises a first framework 41 and a second framework 42, the first framework 41 is arranged on one side away from the connecting shaft, one end of the first framework 41 is fixedly connected with the inner wall of the retaining ring 4, the other end of the first framework extends towards the driving shaft 2, a retaining lip is arranged on the first framework 41, one end of the second framework 42 is fixedly connected with the inner wall of the retaining ring 4, the other end of the second framework extends towards the driving shaft 2 and forms a bend on the driving shaft 2, the second framework 42 is provided with a hoop 44 at the bending position, and a sealing lip is arranged on the outer side of the second framework 42. The beneficial effect who so sets up is: set up like this, adopt this kind of structure can effectively improve the leakproofness, retaining ring 4 structure is convenient for demolish simultaneously, thereby improve and overhaul maintenance efficiency, while simple structure, good result of use has, further through the seal assembly structure, effectively seal, through two skeletons, can constitute the seal structure of returning the font, reduce the possibility of seepage, be provided with the hoop 44 on the second skeleton 42 simultaneously, can guarantee the stable position of second skeleton 42, guarantee that the seal lip on the skeleton can contradict in drive shaft 2, guarantee sealed stability, better sealed leak protection effect has, improve the reliability that overall structure used.

As a further arrangement of the present invention, a support arm 43 is further provided on the second framework 42 and extends toward the first framework 41, and the support arm 43 is disposed on the inner sidewall of the first framework 41 in an abutting manner. The beneficial effect who so sets up is: effectively improve the stability in first skeleton 41 position, simple structure simultaneously, it is convenient to constitute, and overall stability is strong, still is formed with the seal structure of returning the word between first skeleton 41 and second skeleton 42 through support arm 43 simultaneously, further improvement leakproofness

As a further configuration of the present invention, a rib is further formed at one bent end of the second frame 42. The beneficial effect who so sets up is: the flanges are arranged in this way, so that the hoop sleeve 44 is prevented from being loosened and running out, and the stability of the whole structure is improved.

As a further arrangement of the utility model, a clamping groove is formed in the position, corresponding to the retainer ring 4, of the pump body 1, an elastic pressing ring 11 is arranged in the clamping groove, and the elastic pressing ring 11 abuts against the retainer ring 4. The beneficial effect who so sets up is: effectively guarantee the stable position of retaining ring 4, difficult emergence pine takes off, keeps overall structure's result of use, and simple structure does benefit to the realization simultaneously.

The above examples are only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. The utility model provides a variable plunger pump, includes the pump body, be formed with the drive on the pump body and lead to the groove, the drive is led to the inslot and is rotated and to be worn to be equipped with drive shaft, its characterized in that: the drive leads to groove and includes sealing and connecting portion, the drive shaft corresponds drive and leads to groove connecting portion position and be provided with the connection bearing, the drive leads to the groove and is provided with the retaining ring in sealing position, retaining ring and pump body fixed connection, the retaining ring is contradicted and is set up on the connection bearing, be provided with seal assembly between retaining ring and the drive shaft, seal assembly includes first skeleton and second skeleton, first skeleton setting is in the one side of keeping away from the connecting axle, first skeleton one end and retaining ring inner wall fixed connection, the other end extends the setting to the drive shaft, be provided with the fender lip on the first skeleton, second skeleton one end and retaining ring inner wall fixed connection, the other end extends the setting and forms the buckle to the drive shaft, the second skeleton is provided with hoop cover in the position of buckling, the second skeleton outside is provided with the seal lip.

2. The variable displacement plunger pump of claim 1, wherein: still extend to first skeleton on the second skeleton and be provided with the support arm, the support arm is contradicted and is set up on first skeleton inside wall.

3. A variable displacement piston pump in accordance with claim 1 or 2, wherein: and a flange is formed at one bent end of the second framework.

4. A variable displacement piston pump in accordance with claim 3, wherein: the pump body corresponds the retaining ring position and is provided with the joint groove, be provided with the elasticity clamping ring in the joint groove, the elasticity clamping ring is contradicted on the retaining ring.