Suspended semi submersible vertical turbine pump with reverse impeller

A suspended semi submersible vertical turbine pump with a reverse secondary impeller, comprising a space guide vane, impeller, bearing, pump shaft, mechanical seal shaft sleeve, reverse secondary impeller, and mechanical seal cover. The lower part of the pump shaft is installed inside the space guide vane through a bearing, and the bearing is positioned axially on the pump shaft through the mechanical seal shaft sleeve fitted on the pump shaft. A spring is provided on the outer side of the mechanical seal shaft sleeve, and the lower end of the spring presses the spring pad. The spring pad is located in the first sealing groove of the mechanical seal cover, and a sealing ring is provided in the first sealing groove; There is a second sealing groove on the inner wall of the machine seal cover, and a skeleton seal is provided inside the second sealing groove. The machine seal cover is screwed to the space guide vane; The impeller is installed at the lower end of the pump shaft, connected to the pump shaft through a key, and the reverse auxiliary impeller is installed on the pump shaft through an impeller nut. This technical method has good sealing performance and can effectively reduce the vibration of the front section of the pump shaft, improve the smooth operation of this technical method, enhance the performance of the pump shaft, and extend the service life of this technical method.

Technical requirements: 1. A suspended semi submersible vertical turbine pump with a reverse secondary impeller, characterized by: comprising a space guide vane, an impeller, a bearing, a pump shaft, a machine seal shaft sleeve, a reverse secondary impeller, and a machine seal cover. The lower part of the pump shaft is installed inside the space guide vane through a bearing, and the bearing is axially positioned on the pump shaft through a machine seal shaft sleeve fitted on the pump shaft. The inner hole wall of the machine seal shaft sleeve is provided with a sealing groove, and a sealing ring is provided inside the sealing groove; The outer side of the machine seal shaft sleeve is equipped with a spring, and the lower end of the spring presses the spring cushion block. The spring cushion block is located in the first sealing groove of the machine seal cover, and there is a sealing ring in the first sealing groove of the machine seal cover, located below the spring cushion block; There is a second sealing groove on the inner hole wall of the machine seal cover, and a skeleton seal is provided in the second sealing groove. The machine seal cover is fitted on the shaft and screwed with the space guide vane; The impeller is installed at the lower end of the pump shaft, connected to the pump shaft through a key, and positioned axially through the impeller nut of the reverse auxiliary impeller. The reverse auxiliary impeller is installed on the pump shaft through the impeller nut.