Blade experiment device for tidal current energy water turbine

Abstract

The invention belongs to the field of novel energies and relates to a blade experiment device for a tidal current energy water turbine. The blade experiment device comprises a table frame, a stator blade shaft, a stator blade, a deflection bracket upper arm, a deflection bracket lower arm, a deflection bracket shaft, a rotary blade shaft and a rotary blade. The blade experiment device is mounted on an opened type water groove. During experiments, a working condition of blades of the tidal current energy water turbine can be more actually simulated by rotating the stator blade shaft, the rotary blade shaft and the deflection bracket shaft, and adjusting the different positions of the stator blade and the rotary blade, so that a blade variable attack angle property test, blade property tests under different mounting angles, the blade property test after the water turbine rotates for a circle, and a property test of manual interference effect between the blades of the water turbine can be completed. The problems that the blades of the tidal current energy water turbine have the defects of difficulty in hydraulic property tests, long test period, and larger difference between a test working condition and an actual working condition can be solved.

Description

technical field [0001] The invention belongs to the field of new energy, and relates to a tidal current energy water turbine blade experimental device. technical background [0002] Tidal current energy is an available renewable energy. Under the dual pressure of energy shortage and environmental degradation, tidal current energy has become the most active branch in the field of energy development technology. The tidal current energy turbine is the core component of the tidal current power generation system. According to its structure and operation, the tidal energy turbine can be divided into two types: horizontal axis and vertical axis. [0003] The working principle of the tidal current energy turbine is different from that of the traditional hydropower station. It is a turbine with no pressure drop or low water head. It is similar to the basic principle of a wind turbine. It converts fluid kinetic energy into mechanical energy and is known as an "underwater windmill". T...

AI Technical Summary

Problems solved by technology

[0004] At present, there are three methods for testing the hydraulic performance of the blades of tidal energy turbines. One is to conduct performance experiments on the overall performance of tidal energy turbines, but the equipment costs are high and the cycle is long. Especially when the blades are rotating, it is difficult to measure the flow near the blades. field characteristics, only the overall performance of the turbine can be obtained; the second is to carry out the blowing test of the blade profile in the air wind tunnel, although there are relatively mature methods for the blade profile experiment in the wind tunnel, it is easy to realize the analysis of the blade surface and the vicinity of the blade. Detailed measurement of the flow field, and the cost is low and the cycle is short, but due to the difference between the two working fluids of air and water, the influence of the difference in viscosity and compressibility on the performance of the blade cannot be accurately verified; the third is in the closed However, the current experiments are mainly aimed at the performance of the blades of the turbines in traditional hydropower stations. The experimental data obtained are the performance of cascades composed of multiple blades. The working principle of the water turbine is different, there is a big difference between the test working conditions and the real working conditions of the water turbine, and it is impossible to measure the interference between the blades of the tidal current energy turbine, the experimental results are quite different from the real situation, and the application value is not high

[0005] Since the working principle of the tidal current energy turbine is different from that of the traditional hydropower station turbine, in order to solve the hydraulic performance test problem of the tidal current energy turbine blade, an experimental device for the tidal current energy turbine blade is proposed.

Images