Self balancing multistage pump with ordinary appearance, structure comparison of multistage pumps

Multistage pumps on the market at present there are two kinds of structure forms, one kind is the traditional structure of balance disc type D multistage centrifugal pump; Is a kind of high efficiency and energy saving from the equilibrium structure of self balancing multistage pumps; Now more than two kinds of structure forms of self balancing the appearance of the multistage pump with ordinary multistage pump, make a comparative analysis of structure under:

a, ordinary multistage pumps

1, the common multistage pump appearance figure:

2, general multistage pump cutaway view:

3, the common multistage pump structure:

common multistage pump structure elucidation: the water pump body part of the old multistage water pump are: water ( Low voltage side) And in the middle ( Including the guide vane) And water ( High voltage side embedded gimbal ring) And end cap; Rotor parts are: the main shaft, impeller, shaft sleeve, the balancing plate, cover, bearing block, block set of main parts such as impeller;

normal multistage pump working principle: by liquid water suction, through the heads of the impeller, secondary impeller, the pressure step by step, to form the required pressure, the water from high voltage side. During operation, due to the pressure, and gradually form a great force ( We call this the axial force) Prompt rotor parts such as impeller forward; In order to reduce the axial force, the water inside a balanced system ( Gimbal ring embedded in the water, balance the load on the main shaft, rely on water pressure before and after moving) ; Work in high pressure water will open the balance disc and the gimbal ring, forming reaction, so as to offset the axial force; Since the balance of the water returns to the water inlet through the balance pipe.

2, self balancing multistage pumps

1, self-balancing multistage pump appearance figure ( DGP type suction vertical) :

2, self balancing multistage pump cutaway view:

3, since the balance of multistage pump structure:

since the balance multistage pump structure elucidation: the balance of multistage pump pump body parts are: water section, middle ( Including the guide vane) , double side transition pipe, secondary inlet section, outlet section, end cap, bearing body composition; Rotor parts are: the main shaft, impeller, shaft sleeve, before and after the throttle set of main parts such as;

self balancing multistage pump working principle: by liquid water suction, after is the impeller pressure step by step through transition on either side of the tube into the secondary water period after the impeller pressure to achieve the required pressure step by step, from the middle section will draw off the water. In operation of the axial thrust by symmetrical arrangement of the positive and negative instead of two groups of impeller forces cancel each other out, achieve the goal of automatic balancing.

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