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Measuring method and device for locked rotor torque of turbine rotor blade

A steam turbine rotor and static torque technology, which is used in measuring devices, machine/structural component testing, static/dynamic balance testing, etc. The effect of shortening the test time, convenient operation and high measurement accuracy

Inactive Publication Date: 2008-09-24
HANGZHOU STEAM TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This measurement method makes the rotor dynamic balance test inefficient and difficult to counterweight
However, buying foreign torque measuring equipment is expensive and complicated to operate

Method used

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  • Measuring method and device for locked rotor torque of turbine rotor blade
  • Measuring method and device for locked rotor torque of turbine rotor blade
  • Measuring method and device for locked rotor torque of turbine rotor blade

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Effect test

Embodiment 1

[0020] As shown in Fig. 1 and Fig. 2, the static torque measurement method of a steam turbine rotor blade described in this embodiment is based on the principle of mechanics, using the blade root and blade top of the twisted blade 21 as two supporting points, and using high-precision electronic The scale weighs the weights borne by the two support points, and then combines the distance between the two support points to calculate the moment of the blade 21 using a formula.

[0021] Combined with Figure 3, the specific calculation formula is as follows: Assuming that the center of gravity is G, according to the centrifugal force formula: F=m×r×ω 2 =G×r×ω 2 / g=(G1×r1+G2×r2)ω 2 / g

[0022] Where r1=R root+a; r2=R root+a+L a is the distance from the fulcrum of the blade root tooling to the reference plane, provided when designing the tooling; L is the distance between the two tooling fulcrums, that is, the distance measured by the ball grid.

[0023] From this it can be deduced ...

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Abstract

The invention discloses a static torque measuring method and a measuring device of a steam turbine rotor blade. The method takes the root and the tip of a twisted blade as two supporting points, weighs the bearing capability of the two supporting points with a high-precision electronic scale, integrates with the distance between the two supporting points, and calculates the torque of the blade with a formula. The measuring device essentially includes a frame, a fixed bracket, a blade root electronic scale, a blade root support post, a blade tip support post, a blade tip electronic scale and a mobile bracket; the blade root electronic scale is arranged on the fixed bracket; the blade root electronic scale is provided with the blade root support post; a front and a rear datum planes are arranged before the blade root support post, and a left and a right datum planes are arranged on the side of the blade root support post. The invention has the advantages of high measuring precision, easiness in operation and low cost; in particular the provided measuring device has the advantages of compact design, small size, convenience in operation, blade arrangement before installation, and shortening the test time of the rotor on a high-speed dynamic balancing machine.

Description

technical field [0001] The invention relates to a technique for measuring the static moment of a rotor blade of a steam turbine and calculating the uniform distribution of the moment, in particular to a method and a measuring device for measuring the static moment of the rotor blade of a steam turbine. Background technique [0002] At present, the domestic steam turbine industry generally uses a single electronic scale to measure the mass of each blade before installing the static moment of the rotor blades, and then installs them symmetrically according to the quality. This measurement method makes the rotor dynamic balance test inefficient and difficult to counterweight. However, buying foreign torque measuring equipment is expensive and complicated to operate. Contents of the invention [0003] The object of the present invention is to provide a method and device for measuring the static moment of the rotor blade of a steam turbine with high measurement accuracy, simpl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/12
Inventor 许利红陈龙王兴王志达陈高栋
Owner HANGZHOU STEAM TURBINE
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