CN218787205U

CN218787205U - Centrifugal submerged pump

Info

Publication number: CN218787205U
Application number: CN202223080787.6U
Authority: CN
Inventors: 田元; 卢景宇
Original assignee: Liaoning Hengxing Pump Industry Co ltd
Current assignee: Liaoning Hengxing Pump Industry Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-04-04
Anticipated expiration: 2032-11-21

Abstract

The utility model discloses centrifugal submerged pump has seted up annular guiding gutter and transfusion hole on the seal cover, the feed liquor hole has been seted up on the pump cover, axial guiding gutter has been seted up on pump shaft sliding bearing's interior disc, the backward flow hole has been seted up at the root of impeller, the feed liquor hole of seting up on the high-pressure medium of the outer marginal part of impeller passes through the pump cover, the transfusion hole of seting up in the seal cover wall, the annular guiding gutter of seting up on the seal cover intracavity face enters into the seal cover intracavity, then axial guiding gutter of seting up on the pump shaft sliding bearing, the backward flow hole that the impeller root was seted up returns the low-pressure area of impeller entrance, the friction heat that produces the friction heat that mechanical seal friction terminal surface produced and pump shaft sliding bearing in time effluvium, fully reduce mechanical seal friction terminal surface and pump shaft sliding bearing's temperature, guarantee safety and stability operation and life.

Description

Centrifugal submerged pump

Technical Field

The utility model relates to a centrifugal submerged pump, especially a centrifugal submerged pump that its mechanical seal has a self-cooling mechanism.

Background

The centrifugal submerged pump consists of a pump body, a pump cover, an impeller, a pump shaft sliding bearing, a sealing sleeve, a mechanical seal, a transmission connecting frame and a liquid outlet pipe.

The centrifugal submerged pump sealing sleeve is in butt joint with the pump cover flange, and a mechanical seal is arranged in the sealing sleeve to prevent axial leakage. Although the centrifugal submerged pump body and the sealing sleeve are arranged in the medium liquid, the heat dissipation effect is good, because the pump shaft rotates at a high speed, the friction heat generated by the mechanical seal friction end surface and the friction heat generated by the pump shaft sliding bearing cannot be sufficiently dissipated in time, so that the mechanical seal friction end surface and the pump shaft sliding bearing are overheated, the abrasion of the mechanical seal friction end surface and the pump shaft sliding bearing is accelerated, the service lives of the mechanical seal and the pump shaft sliding bearing are shortened, and the maintenance amount of the pump is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at not enough improving to above-mentioned prior art, provide a centrifugal submerged pump that cooling effect is good to increase of service life. The utility model discloses centrifugal submerged pump comprises the pump body, pump cover, impeller, pump shaft slide bearing, seal cover, mechanical seal, transmission link, drain pipe, characterized by: the upper part of the inner cavity surface of the sealing sleeve is provided with an annular diversion trench, the inner wall of the sealing sleeve is axially provided with a transfusion hole communicated with the annular diversion trench, the outer edge part of the pump cover corresponding to the impeller is provided with a liquid inlet hole communicated with the transfusion hole arranged in the sealing sleeve, the inner circular surface of the pump shaft sliding bearing is distributed and provided with a plurality of axial diversion trenches, and the root part of the back plate of the impeller is provided with a backflow hole.

The utility model discloses the high pressure medium of the outer marginal part of impeller, feed liquor hole through seting up on the pump cover, the infusion hole of seting up in the seal cover wall, the annular guiding gutter of seting up on the seal cover intracavity face enters into the seal cover intracavity, then distribute the axial guiding gutter of seting up on the disc in the pump shaft slide bearing, the backward flow hole that impeller backplate root was seted up returns impeller root, in time fully effluvium with the friction heat that the friction end face of mechanical seal produced and pump shaft slide bearing produced, fully reduce the temperature of mechanical seal friction end face and pump shaft slide bearing, carry out abundant lubrication action to pump shaft slide bearing simultaneously, ensure mechanical seal and pump shaft slide bearing safety and stability operation and life, thereby improve the life of centrifugal submerged pump, reduce the maintenance.

Drawings

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

Detailed Description

The centrifugal submerged pump of the utility model is composed of a pump body 1, a pump cover 2, an impeller 3, a pump shaft 4, a pump shaft sliding bearing 5, a sealing sleeve 6, a mechanical seal 7, a transmission connecting frame 8 and a drain pipe 9; an annular guide groove 61 is arranged on the upper part of the inner cavity surface of the sealing sleeve 6, a liquid inlet hole 62 communicated with the annular guide groove 61 is axially arranged in the wall of the sealing sleeve 6, a liquid inlet hole 21 communicated with the liquid inlet hole 62 arranged in the wall of the sealing sleeve is arranged on the outer edge part of the pump cover 2 corresponding to the impeller 3, a plurality of axial liquid guide grooves 51 are distributed on the inner circular surface of the pump shaft sliding bearing 5, and a backflow hole 31 is arranged at the root part of the back plate of the impeller 3.

The utility model discloses the high pressure medium of the outer marginal part of impeller, feed liquor hole 21 through seting up on the pump cover, the infusion hole 62 of seting up in the seal cover wall, annular guiding gutter 61 of seting up on the seal cover inner chamber face enters into the seal cover inner chamber (be mechanical seal chamber), then the axial guiding gutter of seting up distributes on the disc in the pump shaft slide bearing, the return opening 31 that impeller backplate root was seted up returns the impeller root and is the low-pressure region of impeller entrance promptly, the friction heat that produces the friction terminal surface of 7 friction end faces of mechanical seal and the friction heat that pump shaft slide bearing 5 produced in time fully scatters out, the cooling, carry out abundant lubrication action to pump shaft slide bearing 5 simultaneously, guarantee mechanical seal and pump shaft slide bearing safety and stability operation and life.

Claims

1. Centrifugal submerged pump comprises pump body, pump cover, impeller, pump shaft slide bearing, seal cover, mechanical seal, transmission link, drain pipe, characterized by:

the upper part of the inner cavity surface of the sealing sleeve is provided with an annular diversion trench, the inner wall of the sealing sleeve is axially provided with a transfusion hole communicated with the annular diversion trench, the outer edge part of the pump cover corresponding to the impeller is provided with a liquid inlet hole communicated with the transfusion hole arranged in the sealing sleeve, the inner circular surface of the pump shaft sliding bearing is distributed and provided with a plurality of axial diversion trenches, and the root part of the back plate of the impeller is provided with a backflow hole.