CN202560629U

CN202560629U - Impeller for centrifugal pump

Info

Publication number: CN202560629U
Application number: CN201220208566XU
Authority: CN
Inventors: 谢奎狮; 熊永安; 杨建文; 胡彦伟
Original assignee: HEBEI YUXING BIOLOGICAL ENGINEERING Co Ltd
Current assignee: HEBEI YUXING BIOLOGICAL ENGINEERING Co Ltd
Priority date: 2012-05-10
Filing date: 2012-05-10
Publication date: 2012-11-28
Anticipated expiration: 2022-05-10

Abstract

The utility model discloses an impeller for a centrifugal pump. The impeller for the centrifugal pump comprises a hub and a plurality of vanes, wherein a shaft hole is arranged in the center of the hub. The impeller for the centrifugal pump is characterized in that the vanes are three-dimensional flow parabola vanes, a three-dimensional flow parabola curved surface of each vane leans gradually from the direction of a material outlet to the direction of a material inlet, the angle of inclination is 45 degrees, and the shape of curved surfaces of an impeller front cap and an impeller back cap corresponds to a curve of the vanes. According to the impeller for the centrifugal pump, the three-dimensional flow parabola vanes are adopted to replace a vane structure of a traditional centrifugal pump, the structure of the three-dimensional flow parabola vanes is close to the flowing features of fluid, so that liquid flow becomes three-dimensional from two-dimensional, circulation loss, friction loss and impact loss of the fluid inside an impeller cavity are reduced, and reactive power is avoided. Therefore, the efficiency of the centrifugal pump is increased by above 10 %, the purpose of energy conservation is achieved, and the common problem of cavitation of the centrifugal pump is relived.

Description

The impeller that a kind of centrifugal pump is used

Technical field

The utility model relates to the impeller that a kind of centrifugal pump is used.

Background technique

At present, the traditional centrifugal pump impeller all adopts the binary parabolic curve, referring to Fig. 1 and Fig. 2; Angle between its impeller front and rear covers and the material feeding mouth is the right angle; Make feed liquid get into impeller 90 degree bafflings rapidly, form eddy current, impact at blade and front and rear cover plate angle, the surface friction drag of feed liquid and impeller is also very big; Not only cause energy loss, and form the generation that the region of no pressure causes cavitation phenomenon easily.

The model utility content

The utility model technical issues that need to address provide a kind of reduce fluid circulating loss in the impeller cavity, frictional loss and impact loss, thus the impeller that the centrifugal pump of the efficient of raising centrifugal pump is used.

The technological scheme that the utility model adopted is:

The impeller that a kind of centrifugal pump is used comprises wheel hub and a plurality of blade, is provided with axis hole at the center of wheel hub, it is characterized in that: described blade is a three-dimensional flow parabola blade.

Wherein, the three-dimensional flow parabolic surface of blade is tilted to the material feeding mouth direction by discharging gradually, and the tilt angle is 45 degree.

Wherein, the curve form of impeller protecgulum and impeller bonnet is corresponding with the curve of blade.

Owing to adopted technique scheme, the technological progress that the utility model is obtained is:

The utility model adopts three-dimensional flow parabola impeller to replace the blade wheel structure form of conventional centrifugal pump; This structure makes flow of fluid become three-dimensional by two dimensional motion more near the flow characteristic of fluid, reduces fluid circulating loss in the impeller cavity, frictional loss and impact loss; Avoid wattless power; Thereby the efficient that improves centrifugal pump reaches energy-conservation purpose, and can also alleviate the common cavitation erosion problem of centrifugal pump more than 10%.

Description of drawings

Fig. 1 is the structural representation of existing impeller;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the structural representation of the utility model;

Fig. 4 is the B-B sectional view of Fig. 3.

Wherein: 1, impeller protecgulum; 2, impeller material feeding mouth; 3, blade; 4, impeller bonnet; 5, axis hole; 6, wheel hub.

Embodiment

Below in conjunction with Fig. 3 and Fig. 4 the utility model is explained further details:

The impeller that a kind of centrifugal pump is used; Comprise wheel hub 6 and a plurality of blades 3, be provided with axis hole 5 at the center of wheel hub 6, described blade 3 is a three-dimensional flow parabola blade; The three-dimensional flow parabolic surface of blade 3 is tilted to impeller material feeding mouth 2 directions by discharging gradually, and the tilt angle is 45 degree.The curve form of impeller protecgulum and impeller bonnet is corresponding with the curve of blade.Among the embodiment, the quantity of blade 3 is 6.

The utility model is to utilize parabola ternary curve principle, makes impeller.The blade of impeller is made into the three-dimensional flow parabolic curve by the two-dimensional current parabolic curve; Impeller front and rear covers and blade are made the circular curve shape in feed zone by the right angle; Impeller three-dimensional flow parabolic surface is tilted to the material feeding mouth direction by discharging gradually, and the tilt angle is 45 degree.

According in producing to the needs of centrifugal pump flow Q and lift H, the external diameter and the width of design impeller.

As the flow Q of centrifugal pump (m ³/ hour), lift H (rice), and motor speed n (rev/min) confirm after, the impeller outer diameter D (rice) and the impeller channel clear span B (rice) of centrifugal pump draw by following formula calculus of approximation respectively:

D=85×H ^0.5/n

B=Q×n/300000×H

After drawing the key dimension D, B of impeller, just can select the material of impeller, intensity, inlet size and the diameter of axle etc. of front and rear cover plate according to the character of feed liquid.

Claims

1. the impeller that centrifugal pump is used comprises wheel hub and a plurality of blade, is provided with axis hole at the center of wheel hub, it is characterized in that: described blade is a three-dimensional flow parabola blade.

2. the impeller that a kind of centrifugal pump according to claim 1 is used is characterized in that: the three-dimensional flow parabolic surface of blade is tilted to the material feeding mouth direction by discharging gradually, and the tilt angle is 45 degree.

3. the impeller that a kind of centrifugal pump according to claim 1 and 2 is used is characterized in that: the curve form of impeller protecgulum and impeller bonnet is corresponding with the curve of blade.