Manual Actuator, Vertical Pump, and Vertical Pump Retrofit Method for Suppressing Vibration of Column Pipe of Vertical Pump

摘要

Passive actuators are proposed for suppressing the vibration of the column pipes of the vertical pump, the actuator 10 being a column pipe 3 of the vertical pump 1 and a canister surrounding the column pipe 3. And a passive actuator 10 having a first operating state for adding stiffness between the canister and the column pipe 3 and at least a second operating state for reducing the rigidity. The passive actuator 10 includes a plurality of passive actuator elements 20, each of the actuator elements being configured in a first operating state in a second operating state when the temperature of the passive actuator element 20 changes from a second temperature to a first temperature. Automatically change from the operating state and automatically change from the first operating state to the second operating state when the temperature of the passive actuator element 20 changes from the first temperature to the second temperature. And it is designed, the first temperature is different from the second temperature. In addition, a vertical pump comprising such a passive actuator 10 and a vertical pump retrofitting method are proposed.