CN209838700U

CN209838700U - Non-shaft seal double-suction submerged pump

Info

Publication number: CN209838700U
Application number: CN201920446626.3U
Authority: CN
Inventors: 覃向东; 罗威; 雷建平; 郑辉
Original assignee: YICHANG XIXIA PUMPS Co Ltd
Current assignee: YICHANG XIXIA PUMPS Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2019-12-24
Anticipated expiration: 2029-04-03

Abstract

The utility model discloses a non-shaft seal double-suction submerged pump, which comprises a pump body, wherein an impeller is arranged inside the pump body, the impeller is connected with a pump shaft, the top of the pump body is supported and installed with a bracket through a rear protective plate, and the bottom of the pump body is fixedly connected with a lower suction pipe; the liquid outlet of the pump body is provided with a liquid outlet pipe, the pump shaft penetrates through the support and is rotatably supported through a bearing body arranged at the top of the support, and a motor support used for mounting a motor is fixed at the top of the bearing body. On the basis of a vertical submerged pump used in the existing chemical process, a single-suction impeller is changed into a double-suction impeller, the opening of a rear protection plate is used as a suction inlet of the impeller, and a lower suction pipe is added at the suction inlet of a pump body.

Description

Non-shaft seal double-suction submerged pump

Technical Field

The utility model relates to a chemical pump field, in particular to no bearing seal double suction submerged pump.

Background

The vertical submerged pump that current chemical industry process was used, its main shortcoming is: 1. the shaft seal is positioned below the liquid level of the pumping medium and is easy to damage, and the pump needs to be stopped and moved to the ground when being replaced, which wastes labor and time; 2. The submerged depth is generally not more than 1.5 m, the medium at a deeper position cannot be pumped, and the bottom in the medium pool is easy to generate sludge; if a medium at a deeper position needs to be pumped, the pump shaft and corresponding components need to be lengthened, and the manufacturing cost is greatly increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a no bearing seal double suction submerged pump, on the basis of the vertical submerged pump that current chemical process used, change single suction impeller into double suction impeller, back backplate opening is as a sunction inlet of impeller, increases a lower straw in pump body sunction inlet department simultaneously. After the pump is started, liquid in the medium pool is sucked into the impeller from the lower part of the lower suction pipe and the opening of the rear protective plate simultaneously and is discharged out of the pump body under the action of centrifugal force along with the rotation of the impeller. The length of the lower suction pipe can be configured according to the depth of the medium pool so as to ensure that the bottom medium can be pumped out.

In order to realize the technical characteristics, the purpose of the utility model is realized as follows: a shaft seal-free double-suction submerged pump comprises a pump body, wherein an impeller is arranged inside the pump body, the impeller is connected with a pump shaft, the top of the pump body is supported and installed with a support through a rear protection plate, and the bottom of the pump body is fixedly connected with a lower suction pipe; the liquid outlet of the pump body is provided with a liquid outlet pipe, the pump shaft penetrates through the support and is rotatably supported through a bearing body arranged at the top of the support, and a motor support used for mounting a motor is fixed at the top of the bearing body.

The support adopts tubular structure, at the bottom of support to the one end processing that is close to the pump body has the inlet of a plurality of equipartitions.

An upper suction hole is processed at the central position of the rear guard plate.

And a lower suction hole is formed between the bottom of the pump body and the lower suction pipe.

The impeller adopts a double-suction impeller.

The upper portion of drain pipe passes through mounting panel and clamp and support fixed connection.

The bottom end of the bearing body, which is matched with the pump shaft, is provided with a lower bearing, the bottom end surface of an inner ring of the lower bearing is supported on a shaft ring of the pump shaft through a pushing ring, the bottom end surface of an outer ring of the lower bearing is positioned in the bearing body through a lower bearing end cover, and a suspension oil seal is arranged between the lower bearing end cover and the pushing ring; the pump shaft is characterized in that an upper bearing is mounted at the top of the bearing body matched with the pump shaft, the top of the upper bearing is fixedly mounted at the top of the bearing body through an upper bearing end cover, a labyrinth seal is arranged between the upper bearing end cover and the pump shaft, and the labyrinth seal is fixed at the top of the pump shaft through a bearing lock nut.

And a section of the pump shaft, which is positioned outside the pump shaft and inside the bearing body, is provided with a shaft sleeve.

The utility model discloses there is following beneficial effect:

1. because the double-suction impeller is adopted, shaft seal is omitted, the use reliability of the pump is improved, and the maintenance cost is reduced.

2. After the lower suction pipe is adopted, the purpose of pumping deeper liquid can be achieved under the condition of not changing the main structure of the pump, the manufacturing cost is reduced, and the application range of the pump is enlarged.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a main sectional view of the present invention.

Fig. 2 is an enlarged view of the upper structure of the pump of fig. 1 according to the present invention.

Fig. 3 is an enlarged view of the lower structure of the pump of fig. 1 according to the present invention.

In the figure: the device comprises a motor support 1, a pump shaft 2, a bearing lock nut 3, a labyrinth seal 4, an upper bearing end cover 5, an upper bearing 6, a bearing body 7, a shaft sleeve 8, a lower bearing 9, a lower bearing end cover 10, a push ring 11, a suspension oil seal 12, a mounting plate 13, a support 14, a liquid outlet pipe 15, a rear guard plate 16, an impeller 17, a pump body 18, a lower suction pipe 19, a liquid inlet 20, an upper suction hole 21 and a lower suction hole 22.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1-3, a shaft seal-free double-suction submerged pump comprises a pump body 18, wherein an impeller 17 is arranged inside the pump body 18, the impeller 17 is connected with a pump shaft 2, the top of the pump body 18 is supported and installed with a bracket 14 through a rear protection plate 16, and the bottom of the pump body 18 is fixedly connected with a lower suction pipe 19; a liquid outlet pipe 15 is installed at the liquid outlet of the pump body 18, the pump shaft 2 penetrates through the support 14 and is rotatably supported through a bearing body 7 installed at the top of the support 14, and a motor support 1 used for installing a motor is fixed at the top of the bearing body 7. Through adopting the double suction submerged pump without the shaft seal of the above structure, the double suction impeller is adopted, the shaft seal is removed, the use reliability of the pump is improved, and the maintenance cost is reduced.

Further, the bracket 14 is of a tubular structure, and a plurality of uniformly distributed liquid inlets 20 are formed at the bottom of the bracket 14 and at one end close to the pump body 18. The pump shaft 2 can be supported by the bracket 14.

Further, an upper suction hole 21 is formed at a central position of the rear protector 16. The liquid in the upper layer can be sucked into the pump body 18 through the upper suction hole 21 having the above-described structure.

Further, a lower suction hole 22 is provided between the bottom of the pump body 18 and the lower suction pipe 19. The liquid in the lower suction pipe 19 can be sucked into the pump body 18 through the lower suction hole 22.

Further, the impeller 17 employs a double suction impeller. And the double-suction impeller is adopted, shaft seal is omitted, the use reliability of the pump is improved, and the maintenance cost is reduced.

Furthermore, the upper part of the liquid outlet pipe 15 is fixedly connected with the bracket 14 through a mounting plate 13 and a clamp 23. Through the fixed mounting mode, the stability and the reliability of fixing the liquid outlet pipe 15 are ensured.

Further, a lower bearing 9 is installed at the bottom end of the bearing body 7 matched with the pump shaft 2, the bottom end face of an inner ring of the lower bearing 9 is supported on a shaft collar of the pump shaft 2 through a pushing ring 11, the bottom end face of an outer ring of the lower bearing 9 is positioned inside the bearing body 7 through a lower bearing end cover 10, and a suspension oil seal 12 is arranged between the lower bearing end cover 10 and the pushing ring 11; an upper bearing 6 is installed at the top of the bearing body 7 matched with the pump shaft 2, the top of the upper bearing 6 is fixedly installed at the top of the bearing body 7 through an upper bearing end cover 5, a labyrinth seal 4 is arranged between the upper bearing end cover 5 and the pump shaft 2, and the labyrinth seal 4 is fixed at the top of the pump shaft 2 through a bearing lock nut 3.

Further, a shaft sleeve 8 is mounted on a section of the pump shaft 2 outside and inside the bearing body 7. The bearing inside the bearing body 7 can be positioned by means of the bushing 8.

The utility model discloses a working process and principle:

the pump is installed in place before use, the liquid inlet hole at the lower part of the support is ensured to be positioned below the liquid level of pumped medium by 200mm, after the pump is started, the motor drives the pump shaft to rotate through the coupler, the pump shaft drives the impeller to rotate, liquid in the pump body is discharged from the liquid outlet pipe of the pump body under the action of centrifugal force along with the rotation of the impeller, vacuum is formed at the suction inlet of the impeller, the liquid continuously enters the impeller from the lower suction pipe and the opening of the rear guard plate under the action of atmospheric pressure and a net positive pressure head, and the liquid is continuously discharged from the liquid outlet pipe of the pump.

The above-mentioned embodiments are provided for explaining the present invention, and not for limiting the present invention, and any modifications and changes made to the present invention are within the spirit of the present invention and the scope of the claims and fall within the scope of the present invention.

Claims

1. A shaft seal-free double-suction submerged pump is characterized in that: the pump comprises a pump body (18), wherein an impeller (17) is arranged inside the pump body (18), the impeller (17) is connected with a pump shaft (2), the top of the pump body (18) is provided with a support (14) in a supporting way through a rear protection plate (16), and the bottom of the pump body (18) is fixedly connected with a lower suction pipe (19); drain pipe (15) are installed to the liquid outlet of the pump body (18), support (14) are passed in pump shaft (2) to rotate it through bearing body (7) of installing at support (14) top and support, the top of bearing body (7) is fixed with motor support (1) that are used for installing the motor.

2. The shaftless dual-suction submerged pump according to claim 1, wherein: the support (14) adopts a tubular structure, and a plurality of uniformly distributed liquid inlets (20) are processed at the bottom of the support (14) and at one end close to the pump body (18).

3. The shaftless dual-suction submerged pump according to claim 1, wherein: an upper suction hole (21) is formed in the center of the rear guard plate (16).

4. The shaftless dual-suction submerged pump according to claim 1, wherein: a lower suction hole (22) is arranged between the bottom of the pump body (18) and the lower suction pipe (19).

5. The shaftless dual-suction submerged pump according to claim 1, wherein: the impeller (17) adopts a double-suction impeller.

6. The shaftless dual-suction submerged pump according to claim 1, wherein: the upper part of the liquid outlet pipe (15) is fixedly connected with the bracket (14) through a mounting plate (13) and a hoop (23).

7. The shaftless dual-suction submerged pump according to claim 1, wherein: a lower bearing (9) is arranged at the bottom end of the bearing body (7) matched with the pump shaft (2), the bottom end face of an inner ring of the lower bearing (9) is supported on a shaft ring of the pump shaft (2) through a push-top ring (11), the bottom end face of an outer ring of the lower bearing (9) is positioned in the bearing body (7) through a lower bearing end cover (10), and a suspension oil seal (12) is arranged between the lower bearing end cover (10) and the push-top ring (11); the bearing is characterized in that an upper bearing (6) is installed at the top of the bearing body (7) and the pump shaft (2) in a matched mode, the top of the upper bearing (6) is fixedly installed at the top of the bearing body (7) through an upper bearing end cover (5), a labyrinth seal (4) is arranged between the upper bearing end cover (5) and the pump shaft (2), and the labyrinth seal (4) is fixed at the top of the pump shaft (2) through a bearing locking nut (3).

8. The shaftless dual-suction submerged pump according to claim 1, wherein: and a shaft sleeve (8) is arranged outside the pump shaft (2) and at one section inside the bearing body (7).