CN216691488U

CN216691488U - Vertical canned motor pump

Info

Publication number: CN216691488U
Application number: CN202123386977.6U
Authority: CN
Inventors: 廖勇; 吴炳华
Original assignee: Hanyu Group JSCL
Current assignee: Hanyu Group JSCL
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-07
Anticipated expiration: 2031-12-30

Abstract

The utility model provides a vertical canned motor pump, which comprises a pump body, a pump cover, a rotor, an impeller, a first bearing and a second bearing, wherein the pump cover is arranged on the pump body; the pump body is provided with a first cavity and a second cavity which are formed in sequence in a concave manner on the end surface of the pump body, and a rotor is placed in the first cavity; the rotor comprises a pump shaft and a permanent magnet fixedly arranged on the pump shaft in a penetrating mode, an impeller is fixedly arranged at one end, extending out of the first cavity, of the pump shaft, a first bearing and a second bearing are fixedly arranged on the pump shaft at two ends of the permanent magnet in a penetrating mode, the first bearing is located between the permanent magnet and the impeller and fixedly arranged on the wall surface of the first cavity, the second bearing is located at one end, far away from the impeller, of the pump shaft and is fixedly arranged on the wall surface of the second cavity; the wall surface of the first cavity is radially concave and extends to a first groove formed by an interface of the first cavity and the second cavity from the opening end of the first cavity along the pump shaft direction. In the process of rotor rotation, the liquid in the third cavity plays a lubricating role for the second bearing, prevents the second bearing from causing severe temperature rise and noise due to dry friction, and accelerates wear.

Description

Vertical canned motor pump

Technical Field

The utility model belongs to the field of preparation of canned motor pumps, and particularly relates to a vertical canned motor pump, wherein IPC (International patent Classification) belongs to F04D 13/06.

Background

The lubricating oil of the bearing can be gradually dried after the vertical canned motor pump is used for a long time. Because the electric pump is placed in a mode that the water inlet is reversely immersed under the liquid level, under a general condition, liquid cannot reach the position, with a higher horizontal position, of the bearing at the end, far away from the impeller, of the rotor, and therefore dry friction occurs on the bearing, severe temperature rise and noise are caused, and abrasion is accelerated.

Disclosure of Invention

In order to solve the problem that dry friction is easy to occur to a bearing, the utility model provides a vertical canned motor pump which comprises a pump body, a pump cover, a rotor, an impeller, a first bearing and a second bearing, wherein the pump cover is arranged on the pump body; the pump body is provided with a first cavity and a second cavity which are formed in sequence in a concave manner on the end surface of the pump body, and a rotor is placed in the first cavity; the rotor comprises a pump shaft and a permanent magnet fixedly arranged on the pump shaft in a penetrating mode, an impeller is fixedly arranged at one end, extending out of the first cavity, of the pump shaft, a first bearing and a second bearing are fixedly arranged on the pump shaft at two ends of the permanent magnet in a penetrating mode, the first bearing is located between the permanent magnet and the impeller and fixedly arranged on the wall surface of the first cavity, the second bearing is located at one end, far away from the impeller, of the pump shaft and is fixedly arranged on the wall surface of the second cavity; the impeller pump is characterized in that the wall surface of the first cavity is radially concave and extends to a first groove formed by an interface of the first cavity and the second cavity from the opening end of the first cavity along the pump shaft direction, so that liquid pumped by the impeller can be guided into the first cavity and the second cavity.

Preferably, an exhaust passage is provided at a mating surface of the first cavity and the first bearing to communicate the first cavity with the outside. Specifically, the exhaust passage is radially recessed from a wall surface of the first cavity, and extends from an opening of the first cavity in a direction away from the impeller to a second groove beyond the first bearing.

Specifically, the pump body is a hollow shell, a stator is fixedly arranged in the pump body, and epoxy resin is filled between the shell and the stator to wrap the stator.

Specifically, the pump cover is arranged on the end face, which is concave in the pump body, and is provided with a third cavity which is formed by enclosing with the end face, and the impeller is rotatably accommodated in the third cavity; the pump cover is provided with a water inlet and a water outlet which are communicated with the third cavity, the water inlet is aligned to the pump shaft direction, and the water outlet is aligned to the tangential direction of the rotating track of the impeller.

The utility model has the main beneficial effects that:

1. in the process of rotor rotation, liquid is driven by centrifugal force to rise to the second cavity along first recess from the third cavity in, plays the lubrication action to the second bearing, prevents that the second bearing from causing violent temperature rise and noise because of dry friction for wearing and tearing.

2. When liquid enters the second cavity through the first groove, the second groove forms an exhaust passage for exhausting gas in the first cavity and the second cavity outwards, and gas trapping is prevented.

Drawings

FIG. 1 is a cross-sectional view of a vertical canned motor pump of the present invention;

fig. 2 is a perspective view of the pump body of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments.

As shown in fig. 1, the present invention provides a vertical canned motor pump, which includes a pump body 10, a pump cover 20, a stator 30, a rotor 40, an impeller 50, a first bearing 61, and a second bearing 62.

The pump body 10 is a hollow plastic shell, the stator 30 is fixedly arranged inside the pump body, and epoxy resin 70 is filled in the pump body to wrap the stator 30, so that the stator 30 is waterproof and insulated. The pump body 10 is recessed in one end face thereof, a first cavity 11 and a second cavity 12 with a narrower diameter compared with the first cavity 11 are sequentially formed in the recessed direction, a rotor 40 is placed in the first cavity 11, the rotor 40 comprises a pump shaft 41 and a permanent magnet 42 fixedly arranged on the pump shaft 41 in a penetrating manner, and an impeller 50 is fixedly arranged at one end of the pump shaft 41 extending out of the first cavity 11; fixed first bearing 61 and the second bearing 62 of wearing to be equipped with on the pump shaft 41 at permanent magnet 42 both ends, first bearing 61 is located between permanent magnet 42 and the impeller 50, the outer peripheral face interference joint of first bearing 61 is on the wall of first cavity 11, second bearing 62 is located the one end that impeller 50 was kept away from to pump shaft 41, the outer peripheral face interference joint of second bearing 62 is on the wall of second cavity 12 for rotor 40 is rotatably axial fixity in first cavity 11.

The pump cover 20 is in a volute shape, is mounted on the concave end surface of the pump body 10, and encloses to form a third cavity 21, and the impeller 50 is rotatably accommodated in the third cavity 21. The pump cover 20 is provided with a water inlet 211 and a water outlet 212 which are communicated with the third cavity 21, the water inlet 211 is aligned with the direction of the pump shaft 41, and the water outlet 212 is aligned with the tangential direction of the rotating track of the impeller 50.

The wall surface of the first cavity 11 is radially recessed, and extends from the opening end of the first cavity 11 to the interface between the first cavity 11 and the second cavity 12 along the pump shaft 41 direction, so as to form a first groove 111, and two ends of the first groove 111 are communicated with the second cavity 12 and the third cavity 21. With the long-term use of the present vertical canned motor pump, the lubricating oil of the first bearing 61 and the second bearing 62 is gradually dried. Since the electric pump is placed with the water inlet 211 submerged upside down, the liquid easily lubricates the first bearing 61 near the impeller 50. However, in the canned motor pump of the prior art, the pumped liquid cannot reach the position of the second bearing 62 with a high horizontal position, so that dry friction occurs in the second bearing 62, which causes severe temperature rise and noise, and accelerates wear. In this embodiment, the first groove 111 is disposed, so that in the rotation process of the rotor 40, the liquid is driven by the centrifugal force to enter the first cavity 11 from the third cavity 21 along the first groove 111, and then gradually rises into the second cavity 12, so as to lubricate the second bearing 62 and prevent the second bearing 62 from dry friction.

An exhaust channel is arranged between the peripheral surface of the first bearing 61 and the wall surface of the first cavity 11, and two ends of the exhaust channel are communicated with the first cavity 11 and the third cavity 21. Specifically, the exhaust passage is radially recessed from the wall surface of the first cavity 11, and extends from the open end of the first cavity 11 in a direction away from the impeller 50 to slightly exceed the second groove 112 of the first bearing 61. When the liquid enters the second cavity 12 through the first groove 111, the gas in the first cavity 11 and the second cavity 12 can be discharged from the second groove 112, preventing air trapping.

While particular embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the described embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A vertical canned motor pump comprises a pump body (10), a pump cover (20), a rotor (40), an impeller (50), a first bearing (61) and a second bearing (62); the pump body (10) is provided with a first cavity (11) and a second cavity (12) which are formed in sequence in a concave manner on the end surface of the pump body, and a rotor (40) is placed in the first cavity (11); the rotor (40) comprises a pump shaft (41) and a permanent magnet (42) fixedly arranged on the pump shaft (41) in a penetrating mode, an impeller (50) is fixedly arranged at one end, extending out of the first cavity (11), of the pump shaft (41), a first bearing (61) and a second bearing (62) are fixedly arranged on the pump shaft (41) at the two ends of the permanent magnet (42) in a penetrating mode, the first bearing (61) is located between the permanent magnet (42) and the impeller (50) and fixedly arranged on the wall surface of the first cavity (11), the second bearing (62) is located at one end, far away from the impeller (50), of the pump shaft (41) and fixedly arranged on the wall surface of the second cavity (12); the impeller pump is characterized in that the wall surface of the first cavity (11) is radially concave, and a first groove (111) formed by extending from the opening end of the first cavity (11) to the interface of the first cavity (11) and the second cavity (12) along the pump shaft (41) direction enables liquid pumped by the impeller (50) to be guided into the first cavity (11) and the second cavity (12).

2. The vertical canned motor pump according to claim 1, wherein an exhaust channel is provided at the mating surface of the first chamber (11) and the first bearing (61) to communicate the first chamber (11) with the outside.

3. The canned motor pump according to claim 2, wherein the exhaust channel is radially recessed from the wall of the first chamber (11) and extends from the opening of the first chamber (11) in a direction away from the impeller (50) to a second recess (112) slightly beyond the first bearing (61).

4. The vertical canned motor pump according to claim 1, characterized in that the pump body (10) is a hollow housing, the stator (30) is fixed inside the pump body (10), and epoxy resin (70) is filled between the housing and the stator (30) to wrap the stator (30).

5. The vertical canned motor pump according to claim 1, wherein the pump cover (20) is mounted on the concave end surface of the pump body (10) and has a third cavity (21) enclosed with the end surface, and the impeller (50) is rotatably accommodated in the third cavity (21); the pump cover (20) is provided with a water inlet (211) and a water outlet (212) which are communicated with the third cavity (21), the water inlet (211) is aligned to the direction of the pump shaft (41), and the water outlet (212) is aligned to the tangential direction of the rotating track of the impeller (50).