A wear-resistant Francis turbine suitable for high water head, high speed and high sediment concentration

A high-speed turbine technology, applied in the fields of Francis turbines and low-specific-speed anti-sediment-wearing Francis turbines, can solve the problems of increased wear speed of runners and guide vanes, achieve small resistance loss, reduce vibration, The effect of reducing wear

Active Publication Date: 2020-06-23
TSINGHUA UNIV +1
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  • Claims
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Problems solved by technology

The wear rate of the runner and the guide vane is greatly increased

Method used

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  • A wear-resistant Francis turbine suitable for high water head, high speed and high sediment concentration
  • A wear-resistant Francis turbine suitable for high water head, high speed and high sediment concentration
  • A wear-resistant Francis turbine suitable for high water head, high speed and high sediment concentration

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Embodiment Construction

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments and directional words described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be des...

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Abstract

The invention relates to an anti-wear mixed flow water turbine capable of adapting to high head, high rotation speed and high sand content. The anti-wear mixed flow water turbine comprises a volute, afixed guide vane, a movable guide vane, a rotating wheel and a draft pipe. The movable guide vane molded lines are symmetrical two cubic curve assembly, which makes the velocity in the guide vane area and the resistance loss in the flow passage smaller and the flow more smoothly, and effectively reduces the wear of sediment to the guide vane outlet area; and the newly designed long and short vanerotating wheel can better match the flow field and the structural strength of the rotating wheel, and significantly reduce the wear of sediment to the outlet side of the rotating wheel. The thickness change rule of rotating wheel diameter, vane wrap setting angle, vane inlet angle and the vane from inlet to the outlet can be designed newly through the long and short vane rotating wheel, so thatthe flow field can be matched better, the structural strength of the rotating wheel is better, and the wear of the sediment to the outlet side of the rotating wheel.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and engineering equipment, and in particular relates to a Francis water turbine, in particular to a Francis water turbine with low specific speed and anti-sediment wear which is suitable for high water head, high speed and high sand content. Background technique [0002] Many rivers in my country have high sediment content and large sand diameters. Therefore, the impact of sediment wear on the long-term stable operation of turbines is a factor that needs to be considered in the design process. Most of the power stations built on muddy rivers use Francis turbine units, and the forms of flow channels are rich and varied. [0003] The main feature of the flow path is that the runner adopts a relatively low speed. However, the actual power station investigation found that the wear rate of the guide vane has far exceeded that of the runner, which has become a restrictive factor affecting the no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B3/12F03B3/18
CPCF03B3/121F03B3/18F03B3/183Y02E10/20
Inventor 王正伟杨静罗永要刘健彭崇王岩东
Owner TSINGHUA UNIV
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