Internal energy drive adjustment structure of turbine blades

Abstract

The invention provides a water turbine blade internal energy drive adjusting structure which comprises a pressure energy storing system, an operating system and an execution system, wherein the pressure energy storing system comprises an oil tank, an energy storing device, an oil pump and a pressure automatic control unit, the operating system comprises a digital valve and a displacement sensor, and the execution system comprises an operation connecting arm and a blade servomotor. The pressure energy storing system, the operating system and the execution system are installed in a blade hub. The energy storing device, the oil pump and the digital valve are distributed horizontally in a concentric mode and are connected to the blade servomotor through oil conveying pipelines. An access control system is introduced by electric signals of a blade through an inner cavity cable sliding ring of a main shaft so as to conduct control. The problems that sealing is not good and oil is leaked in the process of conveying external hydraulic energy to a rotating energy receiving part, and oil pressure is limited in rotary sealing conveying operations are solved due to the fact that the pressure energy storing system, the operating system and the execution system are installed in the blade hub and used for adjusting the blade.

Description

technical field [0001] The invention belongs to the technical field of water turbines, and in particular relates to an internal energy drive adjustment structure of a water turbine blade. Background technique [0002] At present, domestic and foreign water turbine blade adjustment technologies all use external pressure oil supply, through the oil receiver to realize the transition between the fixed and rotating parts, and transmit the high-pressure oil to the piston and oil cylinder arranged in the servomotor inside the blade hub to achieve the adjustment of the blade. Purpose. In the conventionally designed blade adjustment structure, only the servomotor is inside the hub, such as figure 1 As shown, its working principle is that the oil in the external oil storage tank is filled into the accumulator through the oil pressure system, and the oil pipeline of the accumulator is supplied to the digital valve, and the measured and given signal is input to the PLC, and the PLC se...

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Problems solved by technology

[0003] The purpose of the invention is to provide a water turbine blade internal energy drive adjustment structure, the pressure energy storage system, operating system and execution system for adjusting the blade are all installed inside the blade hub, which solves the problem of external hydraulic energy Problems of poor sealing and oil leakage during the transmission of the rotating energy-bearing element, and the problem of limited oil pressure in the transmission operation of the rotating seal

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