Electric/mechanic operating mechanism of hydraulic turbine blades

Abstract

An electromechanical operation mechanism of propeller for water turbine can be used to adjust the aperture of propeller for water turbine in stead of hydro-cylinder system. The output shaft of servomotor and reduction gear will be connected with the trapezoidal screw in main shaft of machine set as the up section of trapezoidal nut sheath to be connected to the screw thread of trapezoidal screw and the down end to operation shaft which directly connects with the operation mechanism of propeller in rotary wheel body of water turbine. The servomotor and reduction gear will be fixed at up end of main shaft for machine set through supporting frame and be connected to the main shaft by bilateral thrust bearing. It is better to use DC servomotor and harmonic reduction gear and there will a feedback device near trapezoidal nut sheath to reflect the rotary angle changes of propeller.

Description

technical field [0001] The invention relates to an electric / mechanical operating mechanism for blades of water turbines, which is used for adjusting the opening of paddle blades of water turbines. Background technique [0002] The paddle adjustment of the paddle turbine usually leads the pressure oil from the governor operating oil pipe to the oil receiver at the upper end of the vertical paddle turbine generator set, and enters along the hollow main shaft of the unit through the inner and outer oil pipes. The blade servomotor (operating cylinder) in the runner body of the lower turbine, and then the operating cylinder drives the operating mechanism in the runner body to make all blades forward and reverse at the same time to adjust the flow. [0003] The root pivot of the blade and its bushing are prone to wear when the blade is subjected to huge water pressure for a long time and rotates continuously. After wear and deformation, other sealing materials cannot prevent a lar...

AI Technical Summary

Problems solved by technology

[0005] In addition, this domestic and foreign conventional device not only has a complex structure, but is especially limited by the structure (on the one hand, the inner and outer oil pipes must rotate with the main shaft, and they must also move up and down with the blade servomotor), so that the oil receiver and It is very difficult to seal the joints of the inner and outer oil pipes. Oil leakage and oil leakage are often serious, which leads to frequent start-up of the oil pump in the oil pressure device of the governor. Not only the oil pump is severely worn, but also the power consumption of the plant is continuously consumed

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