Kaplan turbine

Abstract

The invention discloses a Kaplan turbine. The Kaplan turbine comprises a paddle and a rack, wherein the paddle is arranged on the rack through a paddle adjusting mechanism; the paddle adjusting mechanism comprises a hydraulic servomotor, a runner hub, a bearing group, an adjusting rod, a handling frame, a rotating arm and a connecting rod; the runner hub and the rack are fixedly connected, the hydraulic servomotor is arranged on the rack, the paddle is movably arranged on the runner hub, the rotating arm is fixedly arranged at one end, which is located at the inner part of the runner hub, of the paddle, the rotating arm is movably connected with the handling frame through the connecting rod, the handling frame and the adjusting rod are both located at the inner part of the runner hub, one end of the adjusting rod is fixedly connected with the handling frame, and the other end of the adjusting rod is fixedly connected with the hydraulic servomotor through the bearing group. The Kaplan turbine disclosed by the invention is provided with an automated paddle adjusting mechanism, the function of automatically adjusting the angle of the paddle according to water flow and a water head can be realized by the automated paddle adjusting mechanism under a controlled situation, and a paddle adjusting process can be carried out during a running process of the Kaplan turbine.

Description

technical field [0001] The invention relates to an axial flow paddle water turbine. Background technique [0002] Small-diameter axial-flow turbines generally refer to axial-flow turbines with a runner diameter less than 1.8 meters. For axial flow turbines with a runner diameter less than 1.8 meters, because the space inside the runner is too small to arrange a hydraulic slurry adjustment system, and with a fixed-pitch structure, if you want to adjust the angle of the blades, you must stop the machine and manually adjust it. [0003] Although the fixed-blade turbine has a simple structure and is easy to manufacture, because it cannot adjust the blade angle of the runner when the water flow and head of the power station change, its application range is extremely limited, and generally it can only be used in the area of ​​70-100% of the rated output of the turbine. Running, and when operating at 70% of the rated output, the efficiency of the turbine is generally 20-25% lower ...

AI Technical Summary

Problems solved by technology

[0005] 1. The adjusting device is placed on the rotating body, and the angle of the blades of the turbine runner can only be adjusted manually when the unit is shut down, and the joint action with the guide vanes cannot be realized, so the most efficient operation of the turbine cannot be realized;

[0006] 2. Due to its cumbersome pulping operation and human influence, in actual use, the power station rarely uses this device;

[0007] 3. It is troublesome to overhaul and maintain. The main shaft of the turbine and the generator needs to be disassembled during the overhaul and maintenance. The workload is very large. When reassembling, the unit and the unit shaft coupling need to be re-adjusted, which is equivalent to an equipment overhaul, which is time-consuming and laborious;

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