Runner leveling process of utility-type unit

A technology of large units and runners, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of heavy workload and low efficiency, and achieve the effects of improving accuracy, collecting data quickly, and shortening calculation time

Active Publication Date: 2016-06-08
CHINA YANGTZE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, maintenance personnel manually calculate the adjustment amount of each suspension by measuring the elevation of the corresponding position of each blade and combining the data measured by the image level meter, which is inefficient and heavy workload

Method used

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  • Runner leveling process of utility-type unit
  • Runner leveling process of utility-type unit
  • Runner leveling process of utility-type unit

Examples

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Embodiment Construction

[0023] A process for leveling the runners of large-scale units, establishing a mathematical model with runners, suspensions, runner chambers, etc. as samples, combined with the calculation function of the excel table, changing the manual calculation in the process of runner leveling to the automatic calculation of the table , the result is directly displayed on the angle that each hanging nut needs to rotate. The program sets the angle output value with direction: when the hanging nut goes down clockwise, it is positive when the corresponding blade elevation increases, and when it is counterclockwise, it corresponds to the blade elevation decreases. Negative, thus greatly improving the leveling efficiency of the runner.

[0024] Mathematical model principle:

[0025] Such as figure 1 As shown, there is any line segment OA in the XOY plane with length d. The included angle between OA and the X direction is θ, draw a vertical line to the Y axis through point A, and the vertica...

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Abstract

A runner leveling process of a utility-type unit comprises the following steps: establishing a mathematical model with a runner, a suspension and a runner chamber as samples; by combining the computing function of an excel form, changing manual computation in the runner leveling process into automatic computation by means of the form, directly displaying results at angles by which each suspension top nut needs to rotate, and setting, by a program, that angle output values have directions: a positive direction in which each suspension top nut is screwed clockwise and downwards, i.e., the elevation of a corresponding blade is increased, and a negative direction in which each suspension top nut is screwed counterclockwise and upwards, i.e., the elevation of the corresponding blade is reduced. As a result, the runner leveling efficiency is greatly improved. The runner leveling process of the utility-type unit provided by the present invention has the advantages that the efficiency and accuracy in the leveling process are greatly improved by establishing the mathematical model and replacing the original manual computation with computer computation, and further, the quality and efficiency of inspection are improved.

Description

technical field [0001] The invention discloses a process for leveling the runners of large-scale units, which is applicable to the level adjustment of the runners of all large-scale axial-flow paddle-type hydraulic generator sets, and has universality. Background technique [0002] The levelness of the runner of a large hydropower station directly affects the verticality of the main shaft of the unit, which in turn determines whether the bolts between the upper end of the main shaft and the rotor can be smoothly connected, and also affects the installation of the thrust head snap ring, so the installation level of the runner is required to be less than 0.02 mm / m. A large-scale power station unit adjusts the M175 nut of the suspension tool to control the elevation and level of the runner within the standard range, and the runner has a total of 5 blades, corresponding to 5 suspension tools, which is asymmetrical. In the prior art, maintenance personnel manually calculate the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B11/00F03B11/04
CPCF03B11/008F03B11/04Y02E10/20
Inventor 王涛黄雄张海宏徐进吴江
Owner CHINA YANGTZE POWER
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