CN202301162U - Impeller structure - Google Patents

Abstract

The utility model discloses an impeller structure, which comprises a front cover (1), a rear cover (2) and a main blade (3). The main blade (3) is assembled on the front cover (1) and the rear cover (2). ), it also includes auxiliary blades (4), which are arranged on the rear cover plate (2) and keep the same direction of rotation, wherein the auxiliary blades (4) are arc-shaped twisted structures, and a plurality of auxiliary blades ( 4) The twisting direction remains the same. The secondary blades (4) have the same exit angle as the main blades (3). The auxiliary blades (4) and the main blades (3) are interlaced and distributed centrally. In the utility model, the auxiliary blades are arranged on the rear cover to balance the axial component force acting on the rear cover, which solves the technical problem of unbalanced axial force of the impeller and avoids the impact of the auxiliary blades on the electric Adverse effects on pump efficiency.

Description

an impeller structure

technical field

The utility model relates to the technical field of electric pumps, in particular to an impeller structure for electric pumps.

Background technique

During the operation of the electric pump, an axial force acts on the rotor, and under the action of the axial force, the rotor axis is pushed to move. Due to the asymmetry of the front and rear cover plates of the impeller, the impeller has no cover plate at the suction port, and the axial component force acting on the rear cover plate cannot be balanced at the impeller inlet, thus generating the axial force, and the axial force direction to the impeller inlet. In the prior art, in order to avoid the axial force caused by this design defect, auxiliary blades are generally added at the position of the back cover of the impeller to balance the axial force component acting on the back cover to a certain extent. However, since the auxiliary blades are arranged on the impeller, and the auxiliary blades adopt a straight blade structure, during the operation of the pump, the auxiliary blades do work, thereby reducing the working efficiency of the electric pump.

Utility model content

In view of the above defects, the utility model proposes an impeller structure, which solves the technical problem of unbalanced axial force on the impeller, and improves the stability and reliability of the electric pump.

In order to achieve the above object, the utility model is realized through the following technical solutions:

An impeller structure, including a front cover, a rear cover and main blades, the main blade is assembled between the front cover and the rear cover, and also includes auxiliary blades, the auxiliary blades are arranged on the rear cover and the direction of rotation is consistent, Wherein, the auxiliary blades are arc-shaped twisted structures, and the twisting directions of multiple auxiliary blades are consistent.

Preferably, the auxiliary blades have the same exit angle as the main blades.

Preferably, the auxiliary blades and the main blades are interlaced and distributed centrally.

Compared with the prior art, the utility model has the following beneficial effects:

In the utility model, the auxiliary blades are arranged on the back cover to balance the axial component force acting on the back cover, thereby avoiding the axial force generated during the operation of the electric pump and solving the problem of impeller axial force. The technical problem of unbalanced force improves the stability and reliability of the electric pump. The auxiliary blade adopts arc-shaped twisted structure, and the blade inlet shape can be designed according to the direction of liquid flow, which reduces the power loss caused by liquid impact and avoids the adverse effect on the working efficiency of the electric pump.

Description of drawings

Below according to embodiment and accompanying drawing, the utility model is described in further detail.

Fig. 1 is the front view of a kind of impeller result proposed by the utility model.

Fig. 2 is a sectional view of A-A in Fig. 1 .

Fig. 3 is a partial view in the direction of K in Fig. 1 .

Detailed ways

As shown in Figures 1 to 3, Figure 1 is a front view of an impeller proposed by the utility model, Figure 2 is a sectional view of A-A in Figure 1, and Figure 3 is a partial view in the direction of K in Figure 1.

Referring to the accompanying drawings, the utility model proposes an impeller structure, including a front cover 1, a rear cover 2 and a main blade 3, and the main blade 3 is assembled between the front cover 1 and the rear cover 2, and also includes auxiliary blades 4. The auxiliary blades 4 are arranged on the rear cover plate 2 and the rotation directions are consistent, wherein the auxiliary blades 4 are arc-shaped twisted structures, and the twisting directions of the plurality of auxiliary blades 4 are consistent. By arranging auxiliary blades 4 on the rear cover 2 to balance the axial force component acting on the rear cover 2, the axial force generated during the operation of the electric pump is avoided, and the applicable range of the electric pump is expanded. In addition, the auxiliary blade 4 adopts an arc-shaped twisted structure, and the shape of the inlet of the blade can be designed according to the direction of the liquid flow, so that it conforms to the law of liquid flow, reduces the power loss caused by the impact of the liquid, and avoids the arrangement of the 4 pairs of electric pumps in the prior art. impact on work efficiency.

In a preferred embodiment, the auxiliary blade 4 has the same outlet angle β as the main blade 3 , and according to this structural feature, the rotation direction of the auxiliary blade 4 is consistent with that of the main blade 3 when viewed from the impeller inlet direction. In this way, when the outer diameter of the impeller is the same, the work performed on the liquid per unit volume is consistent, so that the liquid will not cause internal turbulence due to the pressure difference, and avoid affecting the working efficiency of the electric pump.

In order to reduce the resonance effect that may be produced by the synchronous action of the main blade 3 and the auxiliary blade 4 on the liquid during the operation of the impeller, thereby affecting the service life of the pump shaft and the bearing, in the structural design of the impeller, the auxiliary blade 4 and the main blade 3 The distribution is staggered and centered to improve the stability of the electric pump.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the realization of the utility model is not limited by the above-mentioned method, as long as various improvements of the method concept and technical solutions of the utility model are adopted, or the utility model is not improved. Directly applying the conception and technical solutions of the utility model to other occasions is within the protection scope of the utility model.

Claims (3)

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.

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