A LC suspended semi submersible vertical turbine pump to prevent impeller loosening

An LC suspended semi submersible vertical turbine pump for preventing impeller loosening, comprising a pump body and a pump shaft; It also includes an impeller set on the pump shaft, which is equipped with an impeller anti loosening component inside. The impeller anti loosening component includes impeller heads and nuts with two open ends; A stop washer is installed between the impeller anti loosening component and the pump shaft and impeller; The lower end of the pump shaft is a stepped shaft with a threaded structure, and a threaded hole is opened at the bottom axis. The impeller head is set on the stepped shaft and connected to the pump shaft thread. After the nut thread passes through the impeller head, it is connected to the pump shaft thread; The connection between the impeller head and the pump shaft is threaded in the opposite direction to the connection between the nut and the pump shaft. It can effectively prevent the impeller from loosening, while increasing the wear resistance of the pump body and improving the service life of the pump.

[Technical Introduction]

The impeller head and pump shaft of the existing suspended semi submersible vertical turbine pump are connected by threads. The use of threaded connections is mainly to prevent the impeller from loosening. However, every time the medium is stopped, the medium will fall back to the suction end of the pump, causing a certain degree of backflow. When the medium falls back, the impeller will rotate in the opposite direction to the working state. At this time, the reverse rotation of the impeller is consistent with the direction of rotation of the impeller nut, which will cause a loosening torque at the impeller nut. This torque will cause damage to the stop washer, thereby causing the impeller to loosen; When the impeller head becomes loose, the impeller cannot operate normally during the next start-up, causing the entire pump to vibrate. At this point, the suspended semi submersible vertical turbine pump needs to be disassembled and inspected before it can be put into normal operation. The conventional design of the pump body is a guide bearing. In media with high impurities, impurities enter the guide bearing. With the high-speed operation of the pump, the wear clearance between the pump shaft and the guide bearing gradually increases, resulting in increased vibration and decreased performance of the pump. In the short term of operation, the number of replacement parts increases, and the cost increases. Therefore, there is an urgent need for a high-performance LC suspended semi submersible vertical turbine pump to solve the various problems encountered above.

Technical implementation ideas

The purpose of this technology is to provide an LC suspended semi submersible vertical turbine pump that can effectively prevent impeller loosening, increase the wear resistance of the pump body, and improve the service life of the pump, in response to the above problems. To achieve the above objectives, the technical solution adopted by this technology is: an LC suspended semi submersible vertical turbine pump that prevents impeller loosening, comprising a pump body 1 and a pump shaft 2; It is characterized in that it further comprises an impeller 3 arranged on the pump shaft 2, and an impeller anti loosening component 4 is arranged inside the impeller 3. The impeller anti loosening component 4 includes impeller heads 41 and nuts 42 with two open ends; A stop washer 5 is installed between the impeller anti loosening component 4 and the pump shaft 2 and impeller 3; The lower end of the pump shaft 2 is a stepped shaft with a threaded structure, and a threaded hole is opened at the bottom axis. The impeller head 41 is set on the stepped shaft and connected to the pump shaft 2 by threads. The nut 42 is threaded through the impeller head 41 and connected to the pump shaft 2 by threads.

A LC suspended semi submersible vertical turbine pump to prevent impeller loosening

[Technical Key Points]

A LC suspended semi submersible vertical turbine pump for preventing impeller loosening, comprising a pump body (1) and a pump shaft (2); Characterized in that it further comprises an impeller (3) arranged on the pump shaft (2), wherein an impeller anti loosening component (4) is arranged inside the impeller (3), and the impeller anti loosening component (4) comprises an impeller head (41) and a nut (42) with two open ends; A stop washer (5) is provided between the impeller anti loosening component (4) and the pump shaft (2) and impeller (3); The lower end of the pump shaft (2) is a stepped shaft with a threaded structure, and a threaded hole is opened at the bottom axis. The impeller head (41) is set on the stepped shaft and connected to the pump shaft (2) by threads. The nut (42) is threaded through the impeller head (41) and connected to the pump shaft (2) by threads; The connection between the impeller head (41) and the pump shaft (2) is threaded in the opposite direction to the connection between the nut (42) and the pump shaft (2).