Impeller of hydraulic turbine
A technology of hydraulic turbines and impellers, which is applied to the supporting elements of blades, engine elements, machines/engines, etc., can solve the problems of low efficiency of hydraulic turbines, restricting popularization and application, etc., and achieves improved efficiency, reduced volume and The effect of high weight and reliability
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[0017] The technical solution of the present invention will be described in detail below in conjunction with the drawings. The flow inside the impeller of the hydraulic turbine is approximately divided into countless (generally 1 to 5) flow surfaces. Take the blade bone line on a certain flow surface as an example to illustrate the structure of the blade.
[0018] Such as figure 1 with image 3 As shown, a hydraulic turbine impeller of the present invention includes a front cover 1, a rear cover 2 and blades 3, and the blades 3 are fixedly connected between the front cover 1 and the rear cover 2. The blade 3 is forward curved. The forward curved blade 3 means that the bending direction of the blade 3 is opposite to the rotation direction of the impeller. The wrap angle of the blade 3 is between 20° and 130°.
[0019] Inlet placement angle of blade 3 In this formula, β 2 Indicates the inlet placement angle of blade 3; u 2 Is the circumferential speed at the inlet of the impelle...
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