CN201013664Y

CN201013664Y - Centrifugal pump

Info

Publication number: CN201013664Y
Application number: CNU2006201089174U
Authority: CN
Inventors: 牟介刚; 张生昌; 邵云锋; 郑水华; 邓鸿英
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2006-10-25
Filing date: 2006-10-25
Publication date: 2008-01-30
Anticipated expiration: 2016-10-25

Abstract

A novel centrifugal pump belongs to the centrifugal pump field. The centrifugal pump includes a pump body, a pump cover and an impeller; a front water flow channel is arranged between the side wall of the pump body and a front cover plate of the impeller; the outlet of the front water flow channel is connected with a sealed ring; a rear water flow channel is arranged between the side wall of the pump cover and the rear cover plate of the impeller; the side wall of the pump body matches with the outer side of the front cover plate of the impeller in shape, and the side wall of the pump cover matches with the outer side of the rear cover plate of the impeller in shape; the front water flow channel and the rear water flow channel change evenly. The utility model provides a novel centrifugal pump capable of effectively reducing hydraulic loss and volumetric loss, and improving the operation efficiency of the pump.

Description

New Centrifugal Pump

(1) technical field

The utility model relates to the centrifugal pump field, the sidewall design scheme of especially a kind of centrifugal pump body, pump cover.

(2) background technique

In traditional centrifugal pump structure, with reference to Fig. 1, its pump housing 1, pump cover 3 sidewall design are more random, the shape of pump housing sidewall 4, pump cover sidewall 5 and the distance of impeller front and rear cover plate are not all required, cause spatial form complexity, space between the pump housing 1, pump cover 2 and the impeller 2 bigger, internal flow is irregular, easily form whirlpool, cause bigger hydraulic loss, volumetric loss simultaneously increases, and reduces the operational efficiency of pump.

(3) summary of the invention

For the bigger hydraulic loss of the existence that overcomes existing centrifugal pump and volumetric loss, deficiency that operational efficiency is lower, the utility model provides a kind of New Centrifugal Pump that can effectively reduce the operational efficiency of hydraulic loss and volumetric loss, raising pump.

The technological scheme that its technical problem that solves the utility model adopts is:

A kind of New Centrifugal Pump, comprise the pump housing, pump cover and impeller, be preceding flow channel between the sidewall of the pump housing and the front shroud of impeller, the outlet of flow channel connects sealing opening ring before described, it between the sidewall of pump cover and the back shroud of impeller the back flow channel, the front shroud outer shape coupling of the sidewall of the described pump housing and impeller, the back shroud outer shape coupling of the sidewall of described pump cover and impeller, described preceding flow channel, back flow channel are the passage of even variation.

Further, the sidewall of the described pump housing is consistent with the front shroud outer shape of impeller, and the sidewall of described pump cover is consistent with the back shroud outer shape of impeller, and the width of described preceding flow channel, back flow channel equates.

The width of flow channel, back flow channel is b before described _o, b _oIn 2.0～2.5mm scope.

Working principle of the present utility model is: the pump housing, the sidewall shape of pump cover is consistent with impeller front and rear cover plate outer shape, can guarantee the pump housing like this, space between pump cover and the impeller sidewall is an even variation, it is stable to flow, even variation, be difficult for producing whirlpool, reduce hydraulic loss, the pump housing, the pump cover sidewall and the impeller front and rear cover plate outside guarantee certain distance, guarantee generally speaking in the 2.0-2.5mm scope, traditional design in this regard without limits, this space, position causes the leakage rate at sealing opening ring place to increase greatly, increase volumetric loss, limit this distance and can play the increase resistance, the effect of enhanced leaktightness reduces leakage rate, finally improves the efficient of pump.

The beneficial effects of the utility model mainly show: the operational efficiency that can effectively reduce hydraulic loss and volumetric loss, raising pump.

(4) description of drawings

Fig. 1 is the structural representation of the pump housing, pump cover and the impeller of existing centrifugal pump.

Fig. 2 is the structural representation of centrifugal pump of the present utility model.

(5) embodiment

Below in conjunction with accompanying drawing the utility model is further described.

With reference to Fig. 2, a kind of New Centrifugal Pump, comprise the pump housing 1, pump cover 3 and impeller 2, between the sidewall 4 of the pump housing and the front shroud of impeller 2 is preceding flow channel, the outlet of flow channel connects sealing opening ring 6 before described, it between the sidewall 5 of pump cover and the back shroud of impeller 2 the back flow channel, the sidewall 4 of the described pump housing mates with the front shroud outer shape of impeller 2, the sidewall 5 of described pump cover mates with the back shroud outer shape of impeller 2, and described preceding flow channel, back flow channel are the passage of even variation.

The sidewall 4 of the pump housing is consistent with the front shroud outer shape of impeller 2, and the sidewall 5 of pump cover is consistent with the back shroud outer shape of impeller 2, and the width of described preceding flow channel, back flow channel is equal, even, suitable.The width of preceding flow channel, back flow channel is b _o, b _oIn 2.0～2.5mm scope.

The sidewall shape of the pump housing 1, pump cover 3 is consistent with impeller 2 front and rear cover plate outer shape, can guarantee that like this space between the pump housing, pump cover and the impeller sidewall is an even variation, and flow stable, even variation are difficult for producing whirlpool, reduce hydraulic loss; The pump housing, pump cover sidewall and the impeller front and rear cover plate outside guarantee certain distance, guarantee generally speaking in the 2.0-2.5mm scope, reduce volumetric loss, and play the increase resistance, and the effect of enhanced leaktightness reduces leakage rate, finally improves the efficient of pump.

Claims

1. New Centrifugal Pump, comprise the pump housing, pump cover and impeller, be preceding flow channel between the sidewall of the pump housing and the front shroud of impeller, the outlet of flow channel connects sealing opening ring before described, it between the sidewall of pump cover and the back shroud of impeller the back flow channel, it is characterized in that: the front shroud outer shape coupling of the sidewall of the described pump housing and impeller, the back shroud outer shape coupling of the sidewall of described pump cover and impeller, described preceding flow channel, back flow channel are the passage of even variation.

2. New Centrifugal Pump as claimed in claim 1, it is characterized in that: the sidewall of the described pump housing is consistent with the front shroud outer shape of impeller, the sidewall of described pump cover is consistent with the back shroud outer shape of impeller, and the width of described preceding flow channel, back flow channel equates.

3. New Centrifugal Pump as claimed in claim 2 is characterized in that: the width of flow channel, back flow channel is b before described _o, b _oIn 2.0～2.5mm scope.