Horizontal multi-stage pump with variable lifts

Abstract

The invention discloses a horizontal multi-stage pump with variable lifts. The horizontal multi-stage pump with the variable lifts comprises a pump body. The pump body comprises a water feeding section, a water discharging section, a plurality of middle sections arranged between the water feeding section and the water discharging section, and a tail cover, wherein the water feeding section, the water discharging section, the multiple middle sections and the tail cover communicate with one another sequentially. A sucking section is provided with a sucking opening. A pumping-out section is provided with an output opening. The sucking opening and the output opening are both arranged upwards. A plurality of impellers are arranged on a pump shaft in an inner cavity of the multi-section pump body and include the first-stage impeller installed on the part, near the water feeding section, of the pump shaft, and the multiple second-stage impellers arranged at the back of the first-stage impeller. A balancing device is arranged on one side of the water discharging section of the pump body. Each middle section is internally provided with one impeller, and the number of the middle sections of the pump body is variable. A plurality of impeller installation positions are reserved on the pump shaft. The outer diameter of the later-stage impeller is larger than that of the former-stage impeller. The hub diameter of the later-stage impeller is equal to that of the former-stage impeller. The designed flow amounts of all the stages of impellers are the same, the lifts are different, it is guaranteed that all the stages of impellers can be in the best work condition at the same time, and efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of fluid pumps, in particular to a horizontal multistage pump with a variable design head. Background technique [0002] Horizontal multistage centrifugal pump has the characteristics of wide performance range, low noise, long life, convenient installation and maintenance, etc. It is used to transport clean water or other liquids with physical and chemical properties similar to water. It is mainly suitable for water supply and drainage of urban high-rise buildings and fire water, power plants. , factories, mine water supply and drainage, long-distance water delivery, water in the production process cycle, HVAC cycle, domestic water and other purposes. [0003] However, the existing horizontal multistage centrifugal pump has poor suction performance and large axial force. At the same time, the conventional multistage centrifugal pump has the same parameters such as the flow rate and lift of the impellers at a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing horizontal multistage centrifugal pump has poor suction performance and relatively large axial force. The resulting flow losses are different, resulting in impellers of all stages not being at the optimum operating point at the same time, and thus reducing efficiency. In order to solve the above problems, the present invention provides a variable head horizontal multistage pump

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