CN215762414U

CN215762414U - Auxiliary impeller for slurry pump

Info

Publication number: CN215762414U
Application number: CN202121668522.0U
Authority: CN
Inventors: 羊金涛
Original assignee: Hebei Panjin Pump Industry Co ltd
Current assignee: Hebei Panjin Pump Industry Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-02-08
Anticipated expiration: 2031-07-22

Abstract

The utility model discloses an auxiliary impeller for a slurry pump, which comprises an auxiliary impeller body, wherein a central hole penetrating through the auxiliary impeller body is formed in the center of the auxiliary impeller body, the auxiliary impeller body comprises a first end face, a first annular bulge is arranged on the edge of the central hole towards the side of the first end face, a second annular bulge coaxial with the first annular bulge is arranged on the outer ring of the first annular bulge, a sealing groove is formed between the first annular bulge and the second annular bulge, and a plurality of first radial blades are arranged between the outer edge of the second annular bulge and the edge of the auxiliary impeller body. The auxiliary impeller for the slurry pump has the advantages of good sealing effect, high efficiency of the slurry pump and no loss of the balance axial force of the auxiliary impeller on the main shaft of the slurry pump.

Description

Auxiliary impeller for slurry pump

Technical Field

The utility model relates to the technical field of slurry pumps, in particular to an auxiliary impeller for a slurry pump.

Background

The slurry pump is a device which increases the energy of solid and liquid mixed media and carries the solid and liquid mixed media by means of the action of centrifugal force, and is often matched with an auxiliary impeller to be used simultaneously in the use process of the slurry pump. The auxiliary impeller prevents the slurry from leaking out through the impeller acting force of the reverse centrifugal force, and the auxiliary impeller shaft seal has the advantages of no need of shaft seal water, no dilution of the slurry, good sealing effect and the like. As shown in figure 1, the conventional auxiliary impeller is only provided with blades on the end surface A, is linear and is close to the main shaft motor side of a slurry pump during installation. The working principle is as follows: in the rotation process of the auxiliary impeller, the blade on the A end face drives the slurry to rotate at a high speed, and due to the action of centrifugal force, the slurry is thrown out by the blade to generate pressure difference, so that the sealing effect is achieved. Because traditional expeller only has a A terminal surface to the blade is the linear type, and sealed effect is not good, and the sediment stuff pump is inefficient, still need cooperate other sealed modes to use during the in-service use, and the blade of linear type makes the thick liquid directly get rid of on the expeller protects the chamber through the angle buffering in addition, makes thick liquid and expeller protect the chamber and cut the angle and be the right angle basically, and the balanced axial force of loss expeller balance on the sediment stuff pump main shaft.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the auxiliary impeller for the slurry pump, which has good sealing effect and high efficiency of the slurry pump, and does not lose the balance axial force of the auxiliary impeller on the main shaft of the slurry pump.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an auxiliary impeller for sediment thick liquid pump, includes the auxiliary impeller body center is equipped with the centre bore that runs through the auxiliary impeller body, the auxiliary impeller body includes first terminal surface the centre bore edge is equipped with first annular arch towards first terminal surface side, is equipped with the annular arch of second coaxial with first annular arch in first annular arch outer lane, forms the seal groove between first annular arch and the annular arch of second, is equipped with a plurality of radial first blades that are between the annular arch outward flange of second to auxiliary impeller body edge.

Preferably, the secondary impeller body further comprises a second end surface, and a plurality of second radial blades are arranged on the second end surface.

Preferably, the first blade has a curved shape.

Further preferably, the first blade height is the same as the second annular projection height.

In the technical scheme, in the rotating process of the auxiliary impeller body, the sealing groove and the sealing bulge of the auxiliary impeller protection cavity are matched to rotate to form a labyrinth effect, so that slurry in the cavity where the auxiliary impeller is located is difficult to leak from the sealing groove and the sealing bulge of the auxiliary impeller protection cavity, and the sealing effect of the auxiliary impeller is improved; after a small amount of slurry leaked from the space between the main shaft of the slurry pump and the pump cavity of the slurry pump flows to the cavity where the auxiliary impeller is located, the slurry is accelerated through the second blade arranged on the second end surface, so that the slurry can be quickly accelerated to a centrifugal operation state to play a role in sealing, and meanwhile, the first blade on the first end surface drives the slurry to operate at a high speed, so that the slurry on the first end surface side also keeps the centrifugal operation state, and the sealing effect is further enhanced; and the first curved blade makes the slurry moving direction and the cut-in angle of the auxiliary impeller protective cavity basically consistent, so that the balance axial force of the auxiliary impeller on the main shaft of the slurry pump is not lost, and the working efficiency of the slurry pump is indirectly improved.

Drawings

FIG. 1 is a front view of a conventional auxiliary impeller;

FIG. 2 is a schematic front view of an auxiliary impeller for the slurry pump;

FIG. 3 is a rear view of an auxiliary impeller for the present slurry pump;

fig. 4 is a schematic view of the assembling state of the auxiliary impeller for the slurry pump.

Detailed Description

The utility model will be further explained with reference to the accompanying drawings:

as shown in fig. 2-4, the secondary impeller for slurry pump comprises a secondary impeller body 1, a central hole 2 penetrating through the secondary impeller body 1 is arranged at the center of the secondary impeller body 1, the secondary impeller body 1 comprises a first end surface 10, a first annular bulge 11 is arranged at the edge of the central hole 2 towards the first end surface 10, a second annular bulge 12 coaxial with the first annular bulge 11 is arranged at the outer ring of the first annular bulge 11, a sealing groove 13 is formed between the first annular bulge 11 and the second annular bulge 12, the first end surface 10 is arranged towards the secondary impeller guard cavity 3, the size of the sealing groove 13 is matched with the size of the annular sealing bulge 4 of the secondary impeller guard cavity 3, the sealing bulge 4 of the secondary impeller guard cavity 3 extends into the sealing groove 13, so that the sealing groove 13 and the sealing bulge 4 form a labyrinth effect, and therefore slurry in a cavity 5 where the secondary impeller is located is difficult to leak from between the sealing groove 13 and the sealing bulge 4, the sealing effect of the auxiliary impeller is improved; be equipped with a plurality of radial first blades 14 that are between the second annular bulge 12 outward flange to the edge of auxiliary impeller body 1, first blade 14 can drive the thick liquid and do high-speed operation, because the effect of centrifugal force, first blade 14 throws away the thick liquid, produces the pressure differential, plays sealed effect. In the embodiment, the first blade 14 is in a curve shape, so that the slurry thrown by the first blade 14 is basically consistent with the cutting angle of the auxiliary impeller guard cavity 3, the balance axial force of the auxiliary impeller on the main shaft 6 of the slurry pump is not lost, and the operation stability of the slurry pump is improved. The first blade 14 may be set to the same height as the second annular projection 12 so that the slurry is accelerated by the first blade 14 to the edge of the expeller shroud 3 as it overflows from the seal groove 13.

In a preferred embodiment, the secondary impeller body 1 further includes a second end face 20, a plurality of radial second blades 21 are arranged on the second end face 20, and the second blades 21 enable slurry in the chamber 5 where the secondary impeller is located to be rapidly accelerated to a centrifugal operation state, so that the sealing effect is further enhanced, and the working efficiency of the slurry pump is indirectly improved.

The embodiment is only for explaining the conception and the implementation of the utility model, and does not limit the same, and the technical solution without substantial change is still in the protection scope under the conception of the utility model.

Claims

1. The utility model provides an auxiliary impeller for slurry pump, includes the auxiliary impeller body center is equipped with the centre bore that runs through the auxiliary impeller body, the auxiliary impeller body includes first terminal surface, its characterized in that centre bore edge is equipped with first annular arch towards first terminal surface side, is equipped with the annular arch of second coaxial with first annular arch in first annular arch outer lane, forms the seal groove between first annular arch and the annular arch of second, is equipped with a plurality of radial first blades that are between the annular arch outward flange of second to auxiliary impeller body edge.

2. The secondary impeller for a slurry pump according to claim 1, wherein the secondary impeller body further comprises a second end face on which a plurality of second radial blades are provided.

3. A secondary impeller for a slurry pump according to claim 1 or 2, wherein the first vane is curved.

4. A secondary impeller for a slurry pump according to claim 3, wherein the first vane height is the same as the second annular projection height.