Hydrolic mechanism free electric motor servo system water turbine speed regulator

Abstract

The present invention relates to a motor servosystem hydroturbine governor without hydraulic mechanism. It is mainly formed from electric controller, electric servodriver, guide blade driving motor and mechanical driving mechanism. Said invention is characterized by that on the above-mentioned single-regulated motor servosystem hydroturbine governor without hydraulic mechanism a double-regulated motor servosystem hydroturbine governor without hydraulic mechanism which is formed from carbon brush group, slide ring group, blade driving motor and mechanical driving mechanism is added. Said invention is simple in structure, high in reliability and small in volume, and can use DC power supply of hydraulic power station as stand-by cenergy source.

Description

technical field [0001] The invention belongs to a water turbine speed governor, in particular to a water turbine speed governor of a motor servo system without a hydraulic mechanism. Background technique [0002] The turbine governor adjusts the turbine flow and its flow state through the guide vane mechanism and paddle mechanism of the turbine. This adjustment requires a lot of power. Even small governors mostly use mechanical hydraulic actuators. And often adopt a hydraulic actuator with one or two hydraulic pressure amplification. [0003] At present, the well-known turbine governors at home and abroad can be divided into mechanical hydraulic governors, electro-hydraulic governors and digital electro-hydraulic governors. Digital electro-hydraulic governors are also called microcomputer governors. So far, all turbine governors have adopted hydraulic mechanisms without exception. In the early 1980s, all countries in the world began to develop microcomputer (hydraulic) gov...

AI Technical Summary

Problems solved by technology

[0006] (2) The process is complicated and large-scale processing equipment is required

The oil return tank and the pressure tank are bulky, requiring the use of large processing equipment such as gantry planers and vertical lathes; while the machining accuracy of the oil pump and the above-mentioned various valves is very high, and about 80% of the parts of the entire hydraulic system are non-metallic. The standard must be self-made and multi-work collaborative processing and manufacturing

[0007] (3) Large volume and high quality

[0009] (5) High failure rate during operation

The above three parts are wearing parts and often need to be replaced.

[0010] (6) Large energy consumption

Dropping, running, popping, and leaking of pressure oil in the hydraulic mechanism of hydropower stations are common phenomena, which are difficult to cure

In the standby state, the oil pump will also start continuously to supplement the consumption of pressure oil, and what is more serious is that due to the wear and tear of the oil pump, the oil delivery volume will become less and less, resulting in the oil pump starting more and more frequently. Moreover, the continuous refueling time after each start is getting longer and longer, which makes the reactive power consumption of the governor more and more large.

[0011] (7) High maintenance cost

[0017] With a step-by-step electro-hydraulic converter with one-stage hydraulic amplification, its output will remain at the position when the power supply is disconnected after the power supply disappears. As long as it does not return to the neutral position, the main servomotor of the governor will be fully opened Or the catastrophic consequences of all off, this is a major technical hidden danger

[0018] In addition, the moving coil electro-hydraulic conversion parts are easy to be blocked or jammed; the static fuel consumption of the ring spray electro-hydraulic conversion parts is large, forcing the oil pump to start additionally, which consumes a lot of energy and accelerates the wear of the oil pump; the proportional valve electro-hydraulic The hysteresis of the conversion parts is very large; the nozzle baffle type electro-hydraulic conversion parts are more likely to be blocked and jammed

From the above, it can be seen that the electro-hydraulic conversion components not only have many disadvantages, but also are relatively expensive. So far, there is no really ideal electro-hydraulic conversion component suitable for use in hydropower stations.

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