Vertical suspended semi submersible vertical turbine pump hydraulic shaft end positioning and sealing structure

The vertical suspended semi submersible vertical turbine pump has a positioning and sealing structure for the lower shaft end of the liquid, with a pump body containing an impeller inside. The impeller is fixed on the pump shaft, and a pump suction pipe with a suction channel is fixedly installed below the pump body. The upper part of the pump shaft is equipped with an upper bearing seat assembly, which is characterized in that the lower end of the pump suction pipe is fixedly connected to a bearing seat, and the bearing seat is provided with a flow hole connected to the suction channel; The bearing seat has a bearing chamber, and the lower end of the pump shaft passes through the bearing chamber and is fastened to the bearing; A closed bearing cover is fixedly attached below the bearing seat, which covers the bearing chamber. A sealing structure is provided between the closed bearing cover and the bearing seat; There is a dynamic seal between the pump shaft located above the bearing and the bearing seat. This technical method enables precise positioning of the pump shaft, good rigidity, and good sealing performance.

Technical requirements: 1. A vertical suspended semi submersible vertical turbine pump with a submerged shaft end positioning and sealing structure, comprising a pump body containing an impeller inside, the impeller fixed on the pump shaft, a pump suction pipe with a suction flow channel fixed below the pump body, and an upper bearing seat assembly installed on the upper part of the pump shaft, characterized in that: the lower end of the pump suction pipe is fixedly connected to a bearing seat, and the bearing seat is provided with a flow hole connected to the suction flow channel; The bearing seat has a bearing chamber, and the lower end of the pump shaft passes through the bearing chamber and is fastened to the bearing; A closed bearing cover is fixedly attached below the bearing seat, which covers the bearing chamber. A sealing structure is provided between the closed bearing cover and the bearing seat; There is a dynamic seal between the pump shaft located above the bearing and the bearing seat.