CN210461091U

CN210461091U - Sealing device for submersible pump

Info

Publication number: CN210461091U
Application number: CN201921043996.9U
Authority: CN
Inventors: 王志云; 豆建平; 岳星齐
Original assignee: SICHUAN JIANENG ELECTROMECHANICAL CO Ltd
Current assignee: SICHUAN JIANENG ELECTROMECHANICAL CO Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-05-05
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses a submersible pump sealing device, which comprises a motor shaft (1) and a sealing connecting piece (4), wherein the sealing connecting piece (4) is connected between a pump cover (7) and an oil cylinder (2), and a pump chamber is isolated from the inner cavity of the oil cylinder (2) by arranging a sealing layer; the motor shaft (1) is matched with a middle hole of the sealing connecting piece (4). The pump chamber is separated by the sealing isolation layer, the sealing structure of the inner cavity of the oil cylinder is protected in multiple ways, and the service life of the sealing structure is prolonged.

Description

Sealing device for submersible pump

Technical Field

The utility model relates to a immersible pump field especially relates to a immersible pump sealing device.

Background

The sealing structure adopted by the existing pump products is shown in figure 4, and is a double sealing mode of mechanical sealing and framework oil sealing. However, in the field of submersible pumps, the abrasion to sealing is aggravated due to the fact that silt is heavy in the severe using environment, the framework oil seal is located inside the pump chamber, and water flow scouring is achieved. Because the water flow carries a large amount of silt, the damage to the sealing is very serious, and once the framework oil seal is damaged, the mechanical sealing can be damaged quickly. The service life of the seal structure needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a submersible pump sealing device, which comprises a motor shaft and a sealing connecting piece, wherein the sealing connecting piece is connected between a pump cover and an oil cylinder, and a pump chamber is isolated from the inner cavity of the oil cylinder by arranging a sealing layer; the motor shaft is matched with the middle hole of the sealing connecting piece.

Preferably, the middle hole of the sealing connecting piece is provided with a first groove and a second groove for placing a sealing piece.

Preferably, the first groove is used for placing a mechanical sealing part, and the second groove is used for placing a framework seal.

Preferably, a plurality of threaded holes are formed in the sealing connection piece and used for being connected with the pump cover through bolts.

Preferably, the sealing connection piece is further provided with a third groove for being matched with the bulge on the pump cover.

Preferably, the sealing connecting piece is further provided with a bulge for matching with an oil cylinder.

The beneficial effects of the utility model reside in that: this scheme sets up sealed isolation layer and separates the pump chamber, and hydro-cylinder inner chamber seal structure obtains multiple protection, improves seal structure's life.

Drawings

FIG. 1 is a cross-sectional view of a sealing connection;

FIG. 2 is a top view of the seal;

FIG. 3 is a sealing structure of the improved submersible pump;

FIG. 4 is a sealing structure of the submersible pump before improvement;

the motor comprises a motor shaft 1, an oil cylinder 2, a mechanical seal 3, a seal connecting piece 4, a first groove 401 and a second groove 402. 403-projection, 404-threaded hole, 405-third groove, 5-framework seal, 6-framework seal, 7-pump cover, 8-impeller and 9-pump shell.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-3, a submersible pump sealing device comprises a motor shaft 1 and a sealing connecting piece 4, wherein the sealing connecting piece 4 is connected between a pump cover 7 and an oil cylinder 2, and a pump chamber is isolated from an inner cavity of the oil cylinder 2 by arranging a sealing layer; the motor shaft 1 engages in a central bore of the sealing connection 4.

A first groove 401 and a second groove 402 are formed in the middle hole of the sealing connecting piece 4, a part of the mechanical seal 3 is placed in the first groove 401, a skeleton seal 5 is placed in the second groove 402, the mechanical seal 3 is arranged at the position where the inside of the oil cylinder 2 is matched with the motor shaft 1, and a skeleton seal 6 is arranged at the position where the pump cover 7 is matched with the motor shaft 1.

The impeller 8 drives water flow to flow in a pump chamber formed by the pump cover 7 and the pump shell 9, and the mechanical seal 3 in the oil cylinder 2 can be damaged only after the sediment needs to damage the multilayer sealing structure. Therefore, the service life of the sealing structure of the submersible pump can be effectively prolonged.

The sealing connection piece 4 is provided with a plurality of threaded holes 404 for connecting with the pump cover 7 through bolts. Meanwhile, the sealing connecting piece 4 is also provided with a third groove 405 for protruding fit with the pump cover 7; the sealing connecting piece 4 is further provided with a bulge 403 for matching with the oil cylinder 2, so that the sealing connecting piece is convenient to mount and dismount.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a immersible pump sealing device, includes motor shaft (1), its characterized in that still includes:

the sealing connecting piece (4) is connected between the pump cover (7) and the oil cylinder (2), and the pump chamber is isolated from the inner cavity of the oil cylinder (2) by arranging a sealing layer; the motor shaft (1) is matched with a middle hole of the sealing connecting piece (4).

2. A submersible pump sealing arrangement according to claim 1, characterised in that the central bore of the sealing joint (4) is provided with a first groove (401) and a second groove (402) for placing a seal.

3. A submersible pump sealing arrangement according to claim 2, characterized in that the first groove (401) houses the components of the mechanical seal (3) and the second groove (402) houses the skeleton seal (5).

4. A submersible pump sealing arrangement according to claim 1, characterised in that the sealing joint (4) is provided with a number of threaded holes (404) for connection with a pump cover (7) by means of bolts.

5. A sealing arrangement for a submersible pump according to claim 4, characterized in that the sealing connection (4) is further provided with a third groove (405) for a convex fit on the pump cover (7).

6. A submersible pump sealing arrangement according to claim 1, characterised in that the sealing connection (4) is further provided with a projection (403) for cooperation with the cylinder (2).