CN209818385U - Impeller with reverse spiral sealing groove type centrifugal pump - Google Patents

Abstract

The utility model discloses a sealed groove type centrifugal pump impeller with a reverse spiral, which mainly comprises an impeller main body, wherein the impeller main body comprises blades, an impeller shell, an impeller ring hub, an impeller hub and a pump shaft, the impeller shell comprises two cover plates, wherein the cover plates are arranged at intervals, the installation inner cavity is arranged between the cover plates, the blades are circumferentially distributed in the installation inner cavity, the utility model improves the contact area between the impeller hub and the pump shaft through the density teeth, thereby reducing the fatigue strength of the pump shaft, increasing the torque transmitted by the pump shaft, prolonging the service life of the pump shaft, meanwhile, the reverse spiral sealing groove is formed, so that a medium flow line opposite to the rotation direction of the impeller main body is formed between the impeller opening ring and the impeller opening ring hub, further leakage of a conveying medium is prevented, and the efficiency of the centrifugal pump is improved.

Description

Impeller with reverse spiral sealing groove type centrifugal pump

Technical Field

The utility model belongs to the technical field of the centrifugal pump and specifically relates to a have reverse spiral seal slot type centrifugal pump impeller.

Background

Centrifugal pumps are used as main mechanical products in China, and are various in variety and specification, diversified and complex in structural form. The impeller is used as a core component of the centrifugal pump, and the performance of the impeller directly influences the working efficiency and the service life of the centrifugal pump. The impeller device in the prior art mainly has three defects: firstly, the impeller and the mouth ring are connected by the aid of the riding screws, so that conveying media are easy to leak, and efficiency is reduced; secondly, the impeller is connected with the shaft through a key, so that the transmission torque is small, the fatigue strength of the shaft is high, and the shaft is easy to break; thirdly, front and back apron department produces stress concentration easily, reduces life.

Chinese patent grant publication No. CN 201599245U describes a double-flow-direction blade staggered closed impeller, which comprises a wheel body, a shaft hole is arranged in the middle of the wheel body, a slurry outlet is arranged in the wheel body, impellers are respectively arranged on two sides of the shaft hole, the impeller comprises a left impeller and a right impeller, the left impeller and the right impeller are provided with a slurry inlet, and the left impeller and the right impeller are mutually attached to each other by being backed on each other. Although the device has compact structure and low pulse, and improves the operation stability of the equipment, the problems of medium leakage of the outlet ring of the impeller, stress concentration of the cover plate, high fatigue strength of the shaft at the key connection position and the like are not changed.

Chinese patent application publication No. CN 103867486 a describes an impeller, which includes an impeller body and an air outlet channel axially disposed on the impeller body, wherein a plurality of layers of air inlet portions are disposed in the impeller body, the air outlet channel is communicated with the air inlet portions, each air inlet portion is provided with a partition plate, the partition plate divides the air inlet portion into a plurality of air inlet channels, and one end of each air inlet channel is communicated with the air outlet channel. Although the device increases the total amount of processing media in a step-by-step pressurizing mode, has small volume and no leakage, and improves the working efficiency, the problems of stress concentration of a cover plate, high fatigue strength of a shaft at a key connection position and the like are not solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

The impeller with the reverse spiral sealing groove type centrifugal pump mainly comprises an impeller main body, wherein the impeller main body consists of blades, an impeller shell, an impeller opening ring hub, an impeller hub and a pump shaft, the impeller shell consists of two cover plates, the cover plates are arranged opposite to each other at intervals, an installation inner cavity is formed between the cover plates, the blades are circumferentially distributed in the installation inner cavity, and the blades are respectively connected with the two cover plates in a welding mode; the impeller hub is arranged on the inner side of the impeller shell, the impeller hub and the impeller shell are coaxially arranged, the blades are circumferentially welded and fixed on the outer wall of the impeller hub, density teeth which are circumferentially distributed are uniformly machined on the inner wall of the impeller hub, the pump shaft is inserted into the impeller hub, the pump shaft and the density teeth of the impeller hub are in meshed connection, and the contact area between the impeller hub and the pump shaft is increased through the density teeth, so that the fatigue strength of the pump shaft is reduced, the torque transmitted by the pump shaft is increased, and the service life of the pump shaft is prolonged; the utility model discloses a centrifugal pump, including apron, impeller mouth ring wheel hub, reverse spiral seal groove, impeller main part, impeller mouth ring wheel hub, impeller body, impeller mouth ring wheel hub, impeller body, impeller.

As a further aspect of the present invention: stress relief grooves are processed on the outer surface of the cover plate, the stress concentration problem on the pump cover is reduced through the stress relief grooves, and the service life of the impeller is prolonged.

As a further aspect of the present invention: the mouth ring of the cover plate is coaxially arranged with the pump shaft.

The utility model has the advantages that: the utility model discloses a density tooth improves the area of contact between impeller wheel hub and the pump shaft, thereby has alleviateed the fatigue strength of pump shaft, and increased the moment of torsion of pump shaft transmission, prolonged the life of pump shaft, set up reverse spiral seal groove simultaneously for the choma of impeller main part with impeller choma wheel hub between form one impeller main part and revolve to opposite medium streamline, prevented the further leakage of transport medium, improved centrifugal pump efficiency.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is an isometric schematic view of the impeller of fig. 1.

Fig. 3 is a cross-sectional view of the impeller of fig. 1.

In the figure: 1-impeller main body, 2-blade, 3-cover plate, 4-stress relief groove, 5-impeller mouth ring hub, 6-reverse spiral seal groove, 7-density tooth, 8-impeller hub and 9-pump shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, in an embodiment of the present invention, an impeller with a reverse spiral sealing groove type centrifugal pump mainly includes an impeller main body 1, the impeller main body 1 is composed of blades 2, an impeller shell, an impeller collar hub 5, an impeller hub 8 and a pump shaft 9, the impeller shell is composed of two cover plates 3, wherein the cover plates 3 are arranged opposite to each other at intervals, an installation inner cavity is arranged between the cover plates 3, the blades 2 are circumferentially distributed in the installation inner cavity, and the blades 2 are respectively connected with the two cover plates 3 in a welding manner; the impeller hub 8 is arranged on the inner side of the impeller shell, the impeller hub 8 and the impeller shell are coaxially arranged, the blades 2 are circumferentially welded and fixed on the outer wall of the impeller hub 8, density teeth 7 which are circumferentially distributed are uniformly machined on the inner wall of the impeller hub 8, the pump shaft 9 is inserted into the impeller hub 8, the pump shaft 9 and the density teeth 7 of the impeller hub 8 are in meshed connection, and the contact area between the impeller hub 8 and the pump shaft 9 is increased through the density teeth 7, so that the fatigue strength of the pump shaft 9 is reduced, the torque transmitted by the pump shaft 9 is increased, and the service life of the pump shaft 9 is prolonged; the outer port position integrated into one piece of choma of apron 3 has impeller choma wheel hub 5, and processing has reverse spiral seal groove 6 on impeller choma wheel hub 5's the lateral surface, and through impeller main part 1's high-speed rotation, the transport medium is thrown away in impeller main part 1 through blade 2, and when transport medium was located through impeller choma wheel hub 5 this moment, owing to set up reverse spiral seal groove 6 for impeller main part 1's choma with impeller choma wheel hub 5 between form one impeller main part 1 and revolve to opposite medium streamline, prevented transport medium further leakage, improved centrifugal pump efficiency.

Stress relief grooves 4 are processed on the outer surface of the cover plate 3, the stress concentration problem on the pump cover 3 is reduced through the stress relief grooves 4, and the service life of the impeller is prolonged.

The mouth ring of the cover plate 3 is arranged coaxially with the pump shaft 9.

The utility model discloses a theory of operation is: the contact area between the impeller hub 8 and the pump shaft 9 is improved through the density teeth 7, so that the fatigue strength of the pump shaft 9 is reduced, the torque transmitted by the pump shaft 9 is increased, the service life of the pump shaft 9 is prolonged, a conveying medium is thrown out from the impeller body 1 through the blades 2 through high-speed rotation of the impeller body 1, and when the conveying medium passes through the impeller opening ring hub 5, the reverse spiral sealing groove 6 is arranged, so that an impeller body 1 rotating direction opposite medium streamline is formed between the opening ring of the impeller body 1 and the impeller opening ring hub 5, further leakage of the conveying medium is prevented, and the efficiency of the centrifugal pump is improved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (3)

1. The impeller with the reverse spiral sealing groove type centrifugal pump mainly comprises an impeller main body, wherein the impeller main body consists of blades, an impeller shell, an impeller opening ring hub, an impeller hub and a pump shaft, the impeller shell consists of two cover plates, the cover plates are arranged opposite to each other at intervals, an installation inner cavity is formed between the cover plates, the blades are circumferentially distributed in the installation inner cavity, and the blades are respectively connected with the two cover plates in a welding mode; the impeller is characterized in that density teeth which are distributed circumferentially are uniformly processed on the inner wall of the impeller hub, the pump shaft is inserted into the impeller hub, and the pump shaft is meshed and connected with the density teeth of the impeller hub; an impeller opening ring hub is integrally formed at the outer opening position of the opening ring of the cover plate, and a reverse spiral sealing groove is processed on the outer side surface of the impeller opening ring hub.

2. The impeller of claim 1, wherein the stress relief groove is formed on the outer surface of the cover plate.

3. The impeller of claim 1, wherein the mouth ring of the cover plate is disposed coaxially with the pump shaft.