High-efficiency dual-stage centrifugal regenerative pump

Abstract

The invention discloses a high-efficiency dual-stage centrifugal regenerative pump. The high-efficiency dual-stage centrifugal regenerative pump comprises a first-stage centrifugal pump consisting ofa centrifugal impeller and a centrifugal guide blade, a second-stage regenerative pump consisting of a regenerative pump impeller and a regenerative pump body, and a transferring diversion cavity forconnecting the first-stage centrifugal pump with the second-stage regenerative pump; and the centrifugal impeller and the regenerative pump impeller are coaxially fixed on a pump shaft, and a motor isused for simultaneously driving the two impellers to rotate. According to the high-efficiency dual-stage centrifugal regenerative pump disclosed by the invention, through pressurizing of the first-stage centrifugal pump, the gas containing rate of inlet fluid of the regenerative pump can be effectively reduced, the inlet condition of the second-stage regenerative pump is improved, and the operation noise of the pump is reduced. Besides, through the organic combination of the first-stage centrifugal pump and the second-stage regenerative pump, the purpose that the two pumps have complementaryadvantages is achieved, the compact integral structure of the pump is reserved, and the volume of the high-efficiency dual-stage centrifugal regenerative pump compared with that of a conventional regenerative pump is not greatly changed.

Description

technical field [0001] The invention relates to the technical field of water pumps, in particular to a two-stage centrifugal regenerative pump. Background technique [0002] Regenerative pump, also known as vortex pump, friction pump or self-priming pump, is a kind of fluid machinery with large quantity and wide range, low energy efficiency and low power. It first appeared in the 1920s and was developed by Simon and Heng Created and promoted by the construction company. Regenerative pumps are special vane pumps with radial vanes or impellers with small inclinations. Generally speaking, regenerative pumps do not exceed 40% efficiency. Although the efficiency is not high, the regenerative pump has a simple structure, strong self-priming ability, and high head, and is widely used in various fields of the national economy, such as domestic water boosting, air conditioning pumps, and solar water heaters. [0003] When the regenerative pump works, the liquid enters the fluid ar...

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Problems solved by technology

[0005] Therefore, aiming at the shortcomings of current regenerative pumps with relatively small flow rate and efficiency, the present invention integrates regenerative pumps and centrifugal pumps and proposes a two-stage centrifugal regenerative pump that combines the advantages of these two types of pumps.

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