CN202301162U

CN202301162U - Impeller structure

Info

Publication number: CN202301162U
Application number: CN2011203275192U
Authority: CN
Inventors: 薛璟; 薛继长; 程茂胜; 李圣宁
Original assignee: ANHUI LINE ELECTRIC PUMP Co Ltd
Current assignee: ANHUI LINE ELECTRIC PUMP Co Ltd
Priority date: 2011-09-02
Filing date: 2011-09-02
Publication date: 2012-07-04
Anticipated expiration: 2021-09-02

Abstract

The utility model discloses an impeller structure, which comprises a front cover plate (1), a rear cover plate (2) and main blades (3), wherein the main blades (3) are assembled between the front cover plate (1) and the rear cover plate (2); the impeller structure further comprises auxiliary blades (4) which are arranged on the rear cover plate (2) and are kept consistent in the rotation direction, wherein the auxiliary blades (4) are twisted arc-shaped structures; and the twisting directions of the plurality of auxiliary blades (4) are kept consistent; the auxiliary blades (4) and the main blades (3) have the same outlet angle; the auxiliary blades (4) and the main blades (3) are distributed at the centre in a staggered manner. According to the impeller structure disclosed by the utility model, the auxiliary blades are arranged on the rear cover plate to balance an axial component which acts on the rear cover plate, thereby solving the technical problem of the impeller in unbalanced axial stress and avoiding adverse effect to the working efficiency of an electric pump by the auxiliary blades.

Description

A kind of blade wheel structure

Technical field

The utility model relates to the electric pump technical field, relates in particular to a kind of blade wheel structure that is used for electric pump.

Background technique

Electric pump is in operation process, and effect has axial force on the rotor, and the promotion rotor axis moves under the effect of this axial force.Because the forward and backward cover plate of impeller is asymmetric, impeller does not have cover plate at the suction port position, and acting on axial thrust load on the back shroud can't balance at the impeller eye position, thereby has produced this axial force, and the direction of this axial force is pointed to impeller eye.In the existing technology, the axial force that causes for fear of this design deficiency generally increases back blades in the back shroud of impeller position, with the axial thrust load of balanced action on back shroud to a certain extent.But because back blades is set on impeller, back blades adopts the prismatic blade structure, and in the operation process of pump, back blades does work, thereby has reduced the working efficiency of electric pump.

The model utility content

To above defective, the utility model provides a kind of blade wheel structure, solved the technical problem of impeller shaft to discontinuity equalization, improved the stability and the reliability of electric pump work.

For realizing above-mentioned purpose, the utility model is realized through following technological scheme:

A kind of blade wheel structure comprises front shroud, back shroud and primary blades, and primary blades is assemblied between front shroud and the back shroud; Also comprise back blades, back blades is arranged on the back shroud and sense of rotation is consistent, wherein; Back blades is the arc distorted-structure, and the direction of twist of a plurality of back blades is consistent.

Preferably, back blades has identical exit angle with primary blades.

Preferably, back blades and primary blades placed in the middle distribution that become to interlock.

Compared with prior art, the utlity model has following beneficial effect:

In the utility model; Through back blades is set,, thereby avoided the axial force that in the electric pump operation process, produces with the axial thrust load of balanced action on back shroud on back shroud; Solved the technical problem of impeller shaft, improved the stability and the reliability of electric pump work to discontinuity equalization.Back blades adopts the arc distorted-structure, can reduce the power loss that hydraulic shock causes according to flow direction design blade entry shape, has avoided the adverse effect to the electric pump working efficiency.

Description of drawings

According to embodiment and accompanying drawing the utility model is done further explain below.

Fig. 1 is a kind of impeller result's of the utility model proposition plan view.

Fig. 2 is an A-A sectional view among Fig. 1.

Fig. 3 be among Fig. 1 K to partial view.

Embodiment

To shown in Figure 3, Fig. 1 is a kind of impeller result's of the utility model proposition plan view like Fig. 1, and Fig. 2 is an A-A sectional view among Fig. 1, Fig. 3 be among Fig. 1 K to partial view.

With reference to accompanying drawing, a kind of blade wheel structure that the utility model proposes comprises front shroud 1, back shroud 2 and primary blades 3; Primary blades 3 is assemblied between front shroud 1 and the back shroud 2; Also comprise back blades 4, back blades 4 is arranged on the back shroud 2 and sense of rotation is consistent, wherein; Back blades 4 is the arc distorted-structure, and the direction of twist of a plurality of back blades 4 is consistent.Through back blades 4 is set on back shroud 2, with the axial thrust load of balanced action on back shroud 2, thereby avoided the axial force that in the electric pump operation process, produces, expanded the Applicable scope of electric pump.In addition; Back blades 4 adopts the arc distorted-structure, can make it meet the flow of fluid rule according to flow direction design blade entry shape; Reduce the power loss that hydraulic shock causes, avoided being provided with in the existing technology influence of the working efficiency of 4 pairs of electric pumps of back blades.

In a preferred embodiment, back blades 4 has identical exit angle β with primary blades 3, according to this structure characteristic, observes from the impeller inlet direction, and the sense of rotation of back blades 4 and primary blades 3 also are consistent.Like this, under the identical situation of impeller outer diameter, it is consistent to the liquid acting in the per unit volume, makes liquid that can not because pressure reduction former thereby cause the internal turbulence phenomenon avoids influencing the working efficiency of electric pump.

On-stream in order to reduce impeller; Because primary blades 3 and back blades 4 synchronization motions are to the liquid issuable resonance effect of doing work, thereby influence working life of pump shaft and bearing, in the structural design of impeller; 3 one-tenth staggered placed in the middle distributions of back blades 4 and primary blades are to improve the stability of electric pump.

Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the realization of the utility model does not receive the restriction of aforesaid way; As long as adopted method design of the utility model and the various improvement that technological scheme is carried out; Or the design of the utility model and technological scheme are directly applied to other occasion without improving, all in the protection domain of the utility model.

Claims

1. a blade wheel structure comprises front shroud (1), back shroud (2) and primary blades (3), and primary blades (3) is assemblied between front shroud (1) and the back shroud (2); It is characterized in that; Also comprise back blades (4), a plurality of back blades (4) are arranged on the back shroud (2) and sense of rotation is consistent, wherein; Back blades (4) is the arc distorted-structure, and the direction of twist of a plurality of back blades (4) is consistent.

2. blade wheel structure as claimed in claim 1 is characterized in that, back blades (4) has identical exit angle with primary blades (3).

3. according to claim 1 or claim 2 any blade wheel structure is characterized in that, back blades (4) and primary blades (3) the placed in the middle distribution that become to interlock.