CN210637278U

CN210637278U - Centrifugal pump with power shaft seal mechanism

Info

Publication number: CN210637278U
Application number: CN201921105381.4U
Authority: CN
Inventors: 李欠新; 时其建; 雷荣
Original assignee: Jiangsu Jianan Pump Co ltd
Current assignee: Jiangsu Jianan Pump Co ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-05-29
Anticipated expiration: 2029-07-15

Abstract

The utility model provides a centrifugal pump with power shaft seals mechanism, a serial communication port, including main impeller and pump case, main impeller suit is on the power shaft, and the pump case overlaps on main impeller, and the last still cover of power shaft is equipped with a plurality of auxiliary impeller, and a plurality of auxiliary impeller arrange along the axial of power shaft, and auxiliary impeller's wheel footpath is less than main impeller's wheel footpath, and the tip of power shaft still overlaps and is equipped with the gland that seals a plurality of auxiliary impeller, gland fixed connection the pump case. When the centrifugal pump works, liquid leaked out through a gap between the pump shell and the power shaft flows to the guide impeller to be eliminated and rotated, the auxiliary impeller is driven by the power shaft to rotate to generate a pressure head to limit the liquid from leaking outwards, and when the centrifugal pump does not work, the pressure cover and the lip seal part form parking seal to prevent the liquid from leaking. The utility model provides a centrifugal pump with power shaft seal mechanism, its power shaft seal mechanism is sealed effectual, can deal with continuous operation operating mode and various transport medium.

Description

Centrifugal pump with power shaft seal mechanism

Technical Field

The utility model relates to a centrifugal pump particularly, relates to a centrifugal pump with power shaft seal mechanism.

Background

When the centrifugal pump works, a certain gap exists between the pump shell and the pump shaft, and a sealing device is required to be arranged between the pump shell and the pump shaft in order to prevent liquid from flowing out of the pump through the gap or air from leaking into the pump.

The shaft seal of the traditional centrifugal pump is provided with a packing seal and a mechanical seal, the shaft seal needs to reduce the pressure of fluid at a sealing part so as to ensure the safe operation of the seal, and the shaft seal cannot be used for conveying corrosive liquid of solid particles and suspended impurities, otherwise, the abrasion of the mechanical seal and the damage of a bearing can be caused, so that the economic loss is caused by shutdown and production halt, and the application range of the centrifugal pump is limited.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a centrifugal pump with power shaft seal mechanism, its power shaft seal mechanism is sealed effectual, can deal with continuous operation operating mode and various transport medium.

Therefore, the utility model provides a centrifugal pump with power shaft seals mechanism, a serial communication port, including main impeller and pump case, main impeller suit is on the power shaft, and the pump case overlaps on main impeller, and the last still cover of power shaft is equipped with a plurality of auxiliary impeller, and a plurality of auxiliary impeller arrange along the axial of power shaft, and auxiliary impeller's wheel footpath is less than main impeller's wheel footpath, and the tip of power shaft still overlaps and is equipped with the gland that seals a plurality of auxiliary impeller, gland fixed connection pump case.

Further, the gland is fixedly connected with the pump shell through a plurality of screws.

Further, the inner side of the gland is provided with a lip seal which is sleeved on the end part of the power shaft.

Furthermore, half of the cross section of the auxiliary impeller is T-shaped.

Furthermore, a guide impeller is sleeved on the auxiliary impeller.

Furthermore, half of the cross section of the guide vane wheel is L-shaped.

The utility model provides a centrifugal pump with power shaft seals mechanism, a serial communication port, including main impeller and pump case, main impeller suit is on the power shaft, and the pump case overlaps on main impeller, and the last still cover of power shaft is equipped with a plurality of auxiliary impeller, and a plurality of auxiliary impeller arrange along the axial of power shaft, and auxiliary impeller's wheel footpath is less than main impeller's wheel footpath, and the tip of power shaft still overlaps and is equipped with the gland that seals a plurality of auxiliary impeller, gland fixed connection the pump case. When the centrifugal pump works, liquid leaked out through a gap between the pump shell and the power shaft flows to the guide impeller to be eliminated and rotated, the auxiliary impeller is driven by the power shaft to rotate to generate a pressure head to limit the liquid from leaking outwards, and when the centrifugal pump does not work, the pressure cover and the lip seal part form parking seal to prevent the liquid from leaking.

The utility model provides a centrifugal pump with power shaft seal mechanism, its power shaft seal mechanism is sealed effectual, can deal with continuous operation operating mode and various transport medium.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is an installation schematic diagram of a centrifugal pump with a dynamic shaft seal mechanism provided by an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a shaft seal component with a dynamic shaft seal mechanism according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1 and 2, the centrifugal pump with power shaft seal mechanism that the embodiment of the utility model provides a pair of is shown in the figure, its characterized in that, including main impeller 1 and pump case 11, main impeller 1 suit is on power shaft 2, pump case 11 suit is on main impeller 1, still the cover is equipped with a plurality of auxiliary impeller 2 on power shaft 12, a plurality of auxiliary impeller 2 are arranged along the axial of power shaft 12, the wheel footpath of auxiliary impeller 2 is less than the wheel footpath of main impeller 1, the tip of power shaft 12 still overlaps and is equipped with gland 21 that seals a plurality of auxiliary impeller 2, gland 21 fixed connection pump case 11.

Specifically, referring to fig. 1 and 2, the gland 21 is fixedly coupled to the pump housing 11 by a plurality of screws 211.

Specifically, referring to fig. 1 and 2, the inside of the gland 21 is provided with a lip seal 22 that fits over the end of the power shaft 12.

Specifically, referring to fig. 1 and 2, half of the cross section of the sub-impeller 2 is T-shaped.

Specifically, referring to fig. 1 and 2, the guide vane wheel 23 is sleeved on the sub-vane wheel 2.

Specifically, referring to fig. 1 and 2, half of the cross-section of the guide vane wheel 23 is L-shaped.

Example two:

referring to fig. 1 and fig. 2, a centrifugal pump with a dynamic shaft seal mechanism according to a second embodiment of the present invention is shown in the drawings, and the present embodiment further makes the following technical solutions as improvements on the basis of the above embodiment: the groups of auxiliary impellers 2 are combined into a whole by guide impellers 23 sleeved on the auxiliary impellers and sleeved on the power shaft.

According to the pressure to which the centrifugal pump shaft seal device needs to face, the number of the auxiliary impellers is flexibly changed, and the sealing effect is ensured. A plurality of auxiliary impellers are installed as a whole, and disassembly, assembly and maintenance are facilitated.

Example three:

referring to fig. 1 and fig. 2, a centrifugal pump with a dynamic shaft seal mechanism according to a third embodiment of the present invention is shown in the drawings, and the present embodiment further makes the following technical solutions as improvements on the basis of the above embodiment: the surface of the power shaft 12 is provided with a shaft sleeve, and the auxiliary impeller 2 is fixed on the shaft sleeve through a round nut.

The auxiliary impeller is fixed on the shaft sleeve through the round nut, so that the round nut is uniform in bearing and convenient to mount and dismount, and the auxiliary impeller is greatly convenient to mount, dismount and maintain.

Example four:

referring to fig. 1 and fig. 2, a centrifugal pump with a dynamic shaft seal mechanism according to a fourth embodiment of the present invention is shown in the drawings, and the present embodiment further makes the following technical solutions as improvements on the basis of the above embodiment: a spring washer is arranged at the joint of the gland 21 and the screw 211 for fixedly connecting the pump shell 11.

The spring washer can increase the frictional force between gland and the screw, prevents that centrifugal pump during operation vibrations from causing fastening screw's not hard up, prevents to produce the gap between gland and screw, influences the bearing seal effect.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The centrifugal pump with the power shaft seal mechanism is characterized by comprising a main impeller (1) and a pump shell (11), wherein the main impeller (1) is sleeved on a power shaft (12), the pump shell (11) is sleeved on the main impeller (1), a plurality of auxiliary impellers (2) are further sleeved on the power shaft (12), the auxiliary impellers (2) are arranged along the axial direction of the power shaft (12), the wheel diameter of the auxiliary impellers (2) is smaller than that of the main impeller (1), the end part of the power shaft (12) is further sleeved with a gland (21) for sealing the auxiliary impellers (2), and the gland (21) is fixedly connected with the pump shell (11).

2. A centrifugal pump with a dynamic shaft seal mechanism according to claim 1, characterized in that the gland (21) is fixedly connected to the pump casing (11) by means of a plurality of screws (211).

3. A centrifugal pump with power shaft seal mechanism according to claim 1 or 2, characterized in that the inside of the gland (21) is provided with a lip seal (22) which is sleeved on the end of the power shaft (12).

4. A centrifugal pump with dynamic shaft seal mechanism according to claim 1, characterized in that half of the cross section of the secondary impeller (2) is T-shaped.

5. A centrifugal pump with power shaft seal mechanism according to claim 1 or 4, characterized in that the guide impeller (23) is sleeved on the auxiliary impeller (2).

6. A centrifugal pump with power shaft seal mechanism according to claim 5 characterized in that half of the cross section of the guide vane wheel (23) is L-shaped.