Kaplan turbine runner static balancing test device based on stress bar method, and method

A test device and hydraulic turbine technology, applied in the direction of static/dynamic balance test, measuring device, machine/structural component test, etc., can solve problems such as cumbersome calculation, large safety risk, dumping of runner assembly, etc., and achieve calculation process Simplicity, avoiding cost increase, and increasing safety

Pending Publication Date: 2019-03-29
CHINA YANGTZE POWER
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  • Abstract
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  • Application Information

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Problems solved by technology

The traditional static balance test method of the runner is the steel ball mirror plate method. This method mainly has the following disadvantages: 1. The surface hardness, roughness and local depression of the balance ball and the balance mirror plate are strict; 2. The test period is long , the calculation is cumbersome, and it needs to go through four stages: initial balance, sensitivity inspection, blade counterweight, and total balance; 3.

Method used

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  • Kaplan turbine runner static balancing test device based on stress bar method, and method
  • Kaplan turbine runner static balancing test device based on stress bar method, and method
  • Kaplan turbine runner static balancing test device based on stress bar method, and method

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Embodiment 1

[0060] see Figure 1-4 , the static balance test device for the runner of the axial flow paddle water turbine based on the stress rod method, which includes a balance supporting plate 4 for supporting the runner body 2, and a stress bar 6 is installed at the bottom of the balance supporting plate 4, and the stress The rod 6 is supported on the top of the balance base 7, and the strain gauge group 5 is pasted on the stress rod 6; the blade 3 is installed on the outside of the runner body 2. By using the above-mentioned test device, any unbalance of the runner body is transmitted to the stress rod, thereby forming a bending stress, and the value and direction of the bending stress on the strain gauge group are measured by the strain gauge, thereby calculating the unbalance of the runner body and Orientation; the concentricity of the stress rod and the runner body is guaranteed by the matching accuracy of the balance pallet and the runner, and the levelness of the test platform a...

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Abstract

The invention discloses a Kaplan turbine runner static balancing test device based on a stress bar method, and a method. The test device comprises a balance support plate for supporting a runner body,wherein a bottom of the balance support plate is provided with a stress bar, the stress bar is supported at the top of a balance base, and a strain gauge group is adhered on the stress bar; and blades are mounted at the outside of the runner body. The device and the method provided by the invention substitute the conventional steel ball and runner plate method, are used for Kaplan turbine runnerstatic balancing, and consequently improve test efficiency and accuracy, reduce test safety risk, solidify the test device, reduce test device cost and provide guarantee for a runner static balancingtest of a power plant set.

Description

technical field [0001] The present invention proposes a static balance test device and method for runners of axial-flow paddle-type water turbines based on the stress bar method, which is suitable for static balance tests of large and medium-sized axial-flow paddle-type water turbine runners, and the unevenness of the runners can be accurately calculated using the method Measuring and eccentric orientation have certain practical value. Background technique [0002] In order to increase the output of the unit in a hydropower station, the capacity of the turbine and generator was increased. After the turbine runner was manufactured and installed, a static balance test was required to eliminate the influence of the static unbalance of the runner on the vibration of the turbine. The traditional static balance test method of the runner is the steel ball mirror plate method. This method mainly has the following disadvantages: 1. The surface hardness, roughness and local depression...

Claims

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Application Information

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IPC IPC(8): G01M1/12
CPCG01M1/12
Inventor 吴江吴炜张军郭聪聪
Owner CHINA YANGTZE POWER
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