CN213478731U

CN213478731U - Centrifugal pump bushing structure

Info

Publication number: CN213478731U
Application number: CN202021535427.9U
Authority: CN
Inventors: 李晓
Original assignee: Shanghai Liancheng Group Co Ltd
Current assignee: Shanghai Liancheng Group Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-06-18
Anticipated expiration: 2030-07-29

Abstract

A centrifugal pump bushing structure comprises a pump body, a pump cover, a rotating shaft, an impeller nut, a mechanical seal and a bushing; the rear end and the pump cover of the pump body are connected, the rotating shaft passes through the pump cover and is arranged, the impeller is arranged in the pump body and is fixedly connected to the front end of the rotating shaft through an impeller nut, the front end of the pump cover is provided with a cavity with a front opening, the cavity is arranged corresponding to the peripheral side of the rotating shaft and the peripheral side of the rear end of the impeller, the mechanical seal is arranged on the rotating shaft and is arranged in the cavity, the bushing is embedded in the opening of the cavity and is matched with the rear end of the impeller, and the pump cover, the impeller and the bushing enable. The utility model discloses simple structure can effectively improve the environment that mechanical seal located, makes mechanical seal operation more steady, helps prolonging mechanical seal's life.

Description

Centrifugal pump bushing structure

Technical Field

The utility model relates to a centrifugal pump, in particular to centrifugal pump bush structure.

Background

Centrifugal pumps are used in a wide variety of industrial applications. In the existing centrifugal pump, only a small number of models are designed with the back mouth ring, and compared with most pumps without back mouth ring structures, the pressure at the mechanical seal position is approximately equal to the pressure at the outlet of the impeller, so that the mechanical seal has larger one-way pressure bearing and is easy to damage, and the operation of a unit is further influenced.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a centrifugal pump bush structure.

The purpose of the utility model can be realized by the following technical scheme: a centrifugal pump bushing structure comprises a pump body, a pump cover, a rotating shaft, an impeller nut, a mechanical seal and a bushing; the rear end of the pump body is connected with the pump cover, the rotating shaft penetrates through the pump cover to be arranged, the impeller is installed in the pump body and is fixedly connected to the front end of the rotating shaft through an impeller nut, a cavity with a front opening is arranged at the front end of the pump cover, the cavity is arranged on the periphery of the rotating shaft and the periphery of the rear end of the impeller in a corresponding mode, the mechanical seal is installed on the rotating shaft and is arranged in the cavity, the bushing is embedded into the opening of the cavity and matched with the rear end of the impeller, and the pump cover, the impeller and the bushing enable the cavity to become a sealing cavity.

Furthermore, the front end of the mechanical seal abuts against the rear end of the impeller, and the rear end of the mechanical seal is arranged in a step groove formed in the inner wall of the cavity.

Compared with the prior art, the beneficial effects of the utility model are that: simple structure, pump cover, impeller, bush make the cavity of pump cover front end become the sealed chamber of lower pressure, can effectively improve the environment that mechanical seal located, make mechanical seal operation more steady, help prolonging mechanical seal's life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The parts in the figures are numbered as follows:

1 Pump body

2 Pump cover

3 rotating shaft

4 impeller

5 impeller nut

6 mechanical seal

7 liner

8 cavities.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings to make it clear to those skilled in the art how to practice the invention. While the invention has been described in connection with its preferred embodiments, these embodiments are intended to be illustrative, and not to limit the scope of the invention.

Referring to fig. 1, a centrifugal pump bushing structure includes a pump body 1, a pump cover 2, a rotating shaft 3, an impeller 4, an impeller nut 5, a mechanical seal 6, and a bushing 7.

The rear end of the pump body 1 is connected with the pump cover 2 through bolts, the rotating shaft 3 penetrates through the pump cover 2, the impeller 4 is installed in the pump body 1 and is fixedly connected to the front end of the rotating shaft 3 through an impeller nut 5, the front end of the pump cover 2 is provided with a cavity 8 with a front opening, the cavity 8 is arranged corresponding to the peripheral side of the rotating shaft 3 and the peripheral side of the rear end of the impeller 4, the mechanical seal 6 is installed on the rotating shaft 3 and is arranged in the cavity 8, the front end of the mechanical seal 6 is abutted against the rear end of the impeller 4, the rear end of the mechanical seal 6 is installed in a step groove formed in the inner wall of the cavity 8, the bush 7 is embedded in an opening of the cavity 8 and is matched with the rear end of the impeller 4, so that the pump cover 2, the impeller 4 and the bush 7 enable the cavity 8 to be a sealed cavity and the pressure of the centrifugal pump is lower when the centrifugal pump works, the environment where the, contributing to an extension of the service life of the mechanical seal 6.

It should be noted that many variations and modifications of the embodiments of the present invention are possible, which are fully described, and are not limited to the specific examples of the above embodiments. The above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.

Claims

1. A centrifugal pump bushing structure is characterized by comprising a pump body, a pump cover, a rotating shaft, an impeller nut, a mechanical seal and a bushing; the rear end of the pump body is connected with the pump cover, the rotating shaft penetrates through the pump cover to be arranged, the impeller is installed in the pump body and is fixedly connected to the front end of the rotating shaft through an impeller nut, a cavity with a front opening is arranged at the front end of the pump cover, the cavity is arranged on the periphery of the rotating shaft and the periphery of the rear end of the impeller in a corresponding mode, the mechanical seal is installed on the rotating shaft and is arranged in the cavity, the bushing is embedded into the opening of the cavity and matched with the rear end of the impeller, and the pump cover, the impeller and the bushing enable the cavity to become a sealing cavity.

2. A centrifugal pump liner structure according to claim 1, wherein the front end of the mechanical seal abuts against the rear end of the impeller, and the rear end of the mechanical seal is mounted in a stepped groove formed in the inner wall of the chamber.