CN2378554Y

CN2378554Y - Self-balancing multi-stage centrifugal water pump

Info

Publication number: CN2378554Y
Application number: CN 99221221
Authority: CN
Inventors: 刘延军
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-14
Filing date: 1999-06-14
Publication date: 2000-05-17
Anticipated expiration: 2009-06-14

Abstract

The utility model relates to a self-balancing multi-stage centrifugal water pump, which is characterized in that impellers pf a pump shaft are arranged in pairs. The direction of a water inlet of a first stage impeller is opposite to the direction of a water inlet of a second stage impeller, and a guard disc is arranged between the two stage impellers. Like the connecting mode of the first stage and the second stage impellers, the direction of a water inlet of each stage impeller connected with the front impeller and arranged at the back part of the front impeller is opposite to the previous stage impeller. The water outlet of each impeller is communicated with the water inlet of the rear stage impeller by a smooth flow channel arranged in a midplate. The utility model has the advantages of simple and compact structure, easy maintenance, stable operation, small wear, high mechanical efficiency, long service life and good flow characteristic.

Description

The self-balanced multiple-stage Centrifugal water pump

The utility model belongs to the Centrifugal water pump class, specifically is a kind of self-balanced multiple-stage Centrifugal water pump.

Centrifugal water pump on the market is to make the axial force balance that produces between impeller now, mostly be that end at pump shaft installs a Balance disc additional, slacken the axial force that impeller produces with this, water pump can be worked normally, and the Centrifugal water pump of this structural type finds in actual applications, and it is more serious to exist between each parts of water pump wearing and tearing, mechanical efficiency is low, the rate of fault height, maintenance is big, the deficiency of flow characteristics difference.

It is a kind of simple and compact for structure that the purpose of this utility model is to provide, and is easy to safeguard, can reduce the be in operation wearing and tearing of each parts of water pump, the mechanical efficiency height, and flow characteristics is good, the self-balanced multiple-stage Centrifugal water pump of long service life.

The utility model is achieved through the following technical solutions:

It is a kind of self-balanced multiple-stage Centrifugal water pump, comprise the pump housing, pump shaft and impeller, the pump housing is by inlet segment, middle joint, block plate and water exit end are formed, in the pump housing, install pump shaft, impeller is installed on the pump shaft, radial thrust bearing is installed at the two ends of pump shaft, it is characterized in that the impeller paired mounting on the pump shaft, the water intake of first order impeller is opposite with the water intake direction of second level impeller, block plate is installed between the both stage impellers, with first, the connecting mode of sencond stage impeller is the same, and every grade of impeller in the joining with it rear portion all water intake direction with its previous stage impeller is opposite, and the water outlet of each impeller links by the water intake of runner slick and sly in the middle joint with back level impeller.

When described water pump adopted n level impeller, middle joint number was that n/2-1 (n is an even number) is individual.

The utility model compared with prior art, because the mode that has adopted axial force to balance mutually by both stage impellers, no longer need install Balance disc additional, cast not go here and there when the runner of forward and backward level impeller is by casting in the joint in one and let out at the end of pump shaft, so have the following advantages:

1, simple and compact for structure, be easy to safeguard.

2, can reduce the be in operation wearing and tearing of each parts of water pump, mechanical efficiency height, long service life.

3, flow characteristics is good, the hydraulic efficiency height.

Further describe below in conjunction with accompanying drawing:

Fig. 1: the utility model embodiment 1 structural representation.

Fig. 2: the utility model embodiment 2 structural representations.

Among the figure: joint, 2 impellers, 3 pump shafts, 4 prime impeller intakes, 5 back grade impeller intakes, 6 runners, 7 exit of pump, 8 radial thrust bearings, 9 block plates in 1

Embodiment 1:

In use, according to actual needs, impeller can adopt the mode of even number, as shown in Figure 1, pump shaft 3 impeller 2 high speed rotating, water or other liquid enter impeller 2 from the water intake 4 of previous stage impeller, again after the runner 6 of slyness enters the level impeller water intake 5, enter next circulation again with this working method, discharge from pump outlet 7 up to water or other liquid, because water pump has adopted the opposite mounting type of front and back stages impeller intake direction, so the reverse axial force that the front and back stages impeller is produced is cancelled out each other, saved that the prior art water pump must install additional be used to eliminate impeller work the time balance of axial force dish that produced, one group of radial thrust bearing only need be installed on pump shaft 3 like this, the wearing and tearing of each parts of water pump have promptly been reduced, improved the efficient of water pump again, when water pump adopts n level impeller, middle joint number is that n/2-1 (n is an even number) is individual, the part runner of two impellers that are processed with the runner of a complete impeller in the joint in and link with it, and the connection runner between both stage impellers 6 adopts the bigger slick and sly runner of radius of curvature, improved hydraulic efficiency, the volume that has reduced water pump of while maximum possible, joint 1 two ends during block plate 9 is installed in, the inter-stage that is used for both stage impellers is isolated.

Embodiment 2:

In use, according to actual needs, impeller also can adopt the mode of odd number, as shown in Figure 2, water or other liquid enter impeller 2 from the water intake 4 of previous stage impeller, again after the runner 6 of slyness enters the level water intake 5, enter next circulation again with this working method, discharge from pump outlet 7 up to water or other liquid, because water pump has adopted the opposite mounting type of front and back stages impeller intake direction, so the reverse axial force that the front and back stages impeller is produced is cancelled out each other, and the less end thrust that impeller produced of only surplus afterbody, one group of radial thrust bearing only need be installed on pump shaft 3 like this, just can save that the prior art water pump must install additional, the larger axis that is produced when being used to eliminate wheel rotation is to the equilibrium of forces dish.

Claims

1, a kind of self-balanced multiple-stage Centrifugal water pump, comprise the pump housing, pump shaft and impeller, the pump housing is by inlet segment, middle joint, block plate and water exit end are formed, in the pump housing, install pump shaft, impeller is installed on the pump shaft, radial thrust bearing is installed at the two ends of pump shaft, it is characterized in that the impeller paired mounting on the pump shaft, the water intake of first order impeller is opposite with the water intake direction of second level impeller, block plate is installed between the both stage impellers, with first, the connecting mode of sencond stage impeller is the same, and every grade of impeller in the joining with it rear portion all water intake direction with its previous stage impeller is opposite, and the water outlet of each impeller links by the water intake of runner slick and sly in the middle joint with back level impeller.

2, self-balanced multiple-stage Centrifugal water pump according to claim 1, when it is characterized in that water pump adopts n level impeller, middle joint number is that n/2-1 (n is an even number) is individual.