Supercharged water turbine set with multiple rotating wheels

Abstract

The invention discloses a supercharged water turbine set with multiple rotating wheels. The water turbine set comprises machine shells, a main shaft and a drainage channel, wherein at least two rotating wheels are arranged on the main shaft, the rotating wheels comprise at least one upper rotating wheel which is higher than the tail water level of the drainage channel and at least one lower rotating wheel which is lower than the tail water level of the drainage channel, an independent correspondingly machine shell and a water inlet pipe for supplying water to each rotating wheel are arranged outside each rotating wheel, the water inlet pipes are provided with a plurality of nozzles for jetting water flow to drive the rotating wheels and the main shaft to rotate towards the rotating wheels,the water turbine set further comprises air supplementing pipelines communicating with the interior of the machine shells, and the air supplementing pipelines are used for supplementing air to the rotating wheels so as to enable the rotating wheels to be positioned above the water surface. The invention aims to provide the supercharged water turbine set with the multiple rotating wheels which canensure that the rotary wheel can utilize water heads, reduce the efficiency loss and improve the power generation economic benefit.

Description

technical field [0001] The invention belongs to the field of water turbines, in particular to a pressurized multi-runner water turbine unit. Background technique [0002] The traditional Pelton turbine structure is limited by equipment manufacturing capacity and transportation conditions. It is difficult to achieve a big breakthrough in the capacity of a single unit. Today, the largest impact unit in the world has not been able to break through 450MW. In order to develop a large-capacity, high-efficiency impact-type unit to meet the needs of domestic hydropower development, a multi-runner impact turbine scheme has been proposed. For example, the Chinese patent CN109296491A, which was first applied for, discloses a multi-layer runner structure of a water turbine. , including the main shaft and the water inlet pipe, the vertically set main shaft is equipped with a runner, the downstream end of the water inlet pipe is provided with a ball valve, the downstream end of the ball ...

AI Technical Summary

Problems solved by technology

However, the efficiency of IEC standard turbines is based on the calculation of the input energy based on the upstream and downstream water levels of the river, so the elevation difference of each layer of runners leads to an additional 0.5%~1.5% loss of efficiency. 10,000 kilowatts, 0.5%~1.5% is still a relatively large loss of power generation, and the effective head of the power station cannot be utilized to the maximum, resulting in a waste of resources

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