On-line adjustable centrifugal pump and its on-line adjustment method

Abstract

The invention provides an online adjustable centrifugal pump and an online adjustment method thereof. The online adjustable centrifugal pump comprises a pump shell, a pump shaft, and an impeller assembly mounted on the pump shaft in a sliding manner, and further comprises a ring and a pressure adjusting mechanism, wherein the impeller assembly comprises a left impeller and a right impeller which are oppositely arranged and are connected in a staggered manner; the ring and the left impeller define a first cavity; the ring and the right impeller define a second cavity; the pressure adjusting mechanism communicates with the first cavity and the second cavity; and pressure of the first cavity and the second cavity is increased or decreased through the pressure adjusting mechanism, so that the left impeller and the right impeller slide in the opposite direction or slide in the reverse direction. According to the online adjustable centrifugal pump, the outlet width between the left impeller and the right impeller is controlled through the pressure adjusting mechanism, the flow and lift parameters of the centrifugal pump are adjusted on line under the situation that reliable operation is guaranteed, and the online adjustable centrifugal pump has the advantages of high operation efficiency and low cost.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to an online adjustable centrifugal pump and an online adjustment method thereof. Background technique [0002] With the change of ambient temperature or production load, the circulating water system of industrial and mining enterprises often needs to change the flow and pressure required for production. Technical experts have been developing a certain technology, hoping to meet this requirement. The existing technology adopts methods such as valve adjustment and motor speed regulation (including reducer adjustment, coupler speed regulation, viscous coupling speed regulation, motor magnetic pole logarithm speed regulation, motor step-down speed regulation, motor internal feed speed regulation) and other methods To adjust the parameters during the operation of the centrifugal water pump, in the above methods, the energy consumption of the valve adjustment method is too larg...

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Problems solved by technology

The existing technology adopts methods such as valve adjustment and motor speed regulation (including reducer adjustment, coupler speed regulation, viscous coupling speed regulation, motor magnetic pole logarithm speed regulation, motor step-down speed regulation, motor internal feed speed regulation) and other methods In the above methods, the energy consumption of the valve adjustment method is too large, and the method of motor speed regulation has the disadvantages of large footprint, high cost, and high failure rate.

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