Flow-increasing water turbine system provided with Bernoulli spiral shaped tail water flow increasing device

Abstract

The invention relates to a flow-increasing water turbine system provided with a Bernoulli spiral shaped tail water flow increasing device. The system comprises a bulb tubular turbine-generator and ischaracterized in that the system further comprises the Bernoulli spiral shaped tail water flow increasing device and a tail water flow state controller; the Bernoulli spiral shaped tail water flow increasing device is formed by sequentially arranging a force induction unit, a flow increasing transmission unit, a flow-increasing release unit and a Bernoulli spiral shaped turning wheel unit providedwith Bernoulli spiral shaped turning wheel blades axially in parallel; the Bernoulli spiral shaped turning wheel blades are gradually stretched in the axial direction of a Bernoulli spiral shaped turning wheel hub according to a Bernoulli spiral and uniformly distributed on the circumferential inner wall of the Bernoulli spiral shaped turning wheel hub in a spatially crossed distortion shape; andthe tail water flow state controller controls the blade angle beta 1 of bulb tubular turbine-generator turning wheel blades, the blade angle beta 2 of the Bernoulli spiral shaped turning wheel bladesand the moving distance x of an induction driving rod correspondingly. The flow-increasing water turbine system enables remaining kinetic energy in tail water flow to be used for power generation.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation, and in particular relates to a flow increasing type water turbine system with a Bernoulli spiral tail water flow increasing device. Background technique [0002] my country is rich in low-head hydraulic resources, which are generally located in economically developed areas in the middle and lower reaches of rivers. In recent years, the economies of these regions have developed rapidly, and the demand for electricity has grown rapidly. However, these areas are generally energy-stressed areas, and the developable medium and high head hydropower resources have been developed as early as the 1990s. In order to meet the needs of rapid economic development in the region, people turned to develop low-head resources. Tubular hydropower stations are the best way to develop low-head hydraulic resources, and are generally used for water heads below 25m. Compared with medium and hig...

AI Technical Summary

Problems solved by technology

The device overcomes the existing problems of single power generation method and low power generation efficiency, and realizes high-power power generation

However, this device only relies on the curved deflector with a half-crescent shape in cross-section to divert and gather energy, and its energy gathering effect is minimal, so water energy cannot be fully utilized, resulting in a waste of resources

[0007] To sum up, the existing combined hydroelectric power generation devices are only the series connection of different numbers of power generation devices, without considering the problem of the reduction of device efficiency caused by the change of working conditions, so the maximum performance of the device cannot be fully utilized

At the same time, the energy-gathering device only relies on the reduction of the cross-sectional area to increase the flow, and cannot dynamically adjust the amount of flow increase according to the size of the incoming flow, resulting in variable frequency of output power and poor performance

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