Novel efficient vertical mixed-flow pump

Abstract

The invention discloses a novel efficient vertical mixed-flow pump. The novel efficient vertical mixed-flow pump comprises an outer connecting pipe, an inner connecting pipe, a pump shaft, a guide vane body, an impeller chamber, an impeller, a water-sucking horn mouth, a water outlet bent pipe, a cover plate and a supporting plate, wherein the water-sucking horn mouth is installed at the bottom end of the outer connecting pipe, the inner connecting pipe is arranged in the outer connecting pipe in a sleeved mode, the bottom end of the inner connecting pipe is connected with the guide vane body, the bottom end of the guide vane body is connected with the impeller chamber, the pump shaft penetrates through the inner connecting pipe, the impeller is installed at the tail end, located in the impeller chamber, of the pump shaft, the cover plate covers the upper end of the outer connecting pipe and is in bolt fastening connection with the supporting plate, the upper end of the inner connecting pipe is fixedly connected with the cover plate, a gap is axially formed between the lower end face of the impeller chamber and the upper end face of the water suction horn mouth, and the inner connecting pipe, the guide vane body and the impeller chamber are hung on the cover plate. According to the vertical mixed-flow pump, a seat type structure of an original rotor part is changed into a suspension type structure, the whole rotor is in a suspension state, and weight is directly borne by the supporting plate and is not transmitted to the external connecting pipe, so the influence of the rotor part on the external connecting pipe of the water pump is reduced to the maximum extent.

Description

technical field [0001] The invention relates to a vertical mixed flow pump. Background technique [0002] The vertical mixed flow pump has the characteristics of small footprint, large flow, large diameter, low civil construction cost, and simple maintenance. It is widely used in electric power, steel, urban water supply and drainage, irrigation and other industries. However, there are some defects in the existing vertical mixed-flow pump structure, which are mainly reflected in the following points: [0003] (1) The rotor part of the existing vertical mixed flow pump is a seated structure. The impeller chamber and the bell mouth are matched through the cone surface. Connected to the external pipe, and then passed to the support plate, which is borne by the foundation; [0004] (2) The impeller is an open structure, the blade is easily deformed during casting, and the hydraulic size cannot be guaranteed, which causes the performance of the pump to deviate from the design r...

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Problems solved by technology

[0004] (2) The impeller is an open structure, the blade is easily deformed during casting, and the hydraulic size cannot be guaranteed, which causes the performance of the pump to deviate from the design requirements;

[0005] (3) The lifting height of the rotor is limited, and there is a gap between the open impeller and the impeller chamber. If the lifting height of the rotor is too high, the gap between the impeller and the impeller chamber will increase, and the leakage of the conveying medium will be too large, which will increase the pump. Volume loss, reducing pump efficiency;

[0006] (4) The pump shafts are connected by sleeve couplings, the concentricity of the shafts is relatively poor, and it is not easy to disassemble and install

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