Method for measuring uniformity and synchronism of blade opening

Abstract

The invention discloses a blade opening uniformity and synchronism measuring method, which comprises the following specific steps of: 1, fitting a plurality of inclinometers on a blade of an axial-flow Kaplan turbine, opening each inclinometer, and returning an initial angle to zero; 2, opening the Bluetooth adapter, and wirelessly connecting the computer and the inclinometer; and 3, after determining that the computer and the inclinometer are connected correctly and computer measurement data are normally recorded, the measurer leaves the blade, and the blade operates to measure the opening degree of the blade. Compared with the conventional measurement method, the implementation process is simplified, the operation risks of slipping, mechanical injury, even high-altitude falling and the like of measurement personnel in the blade opening measurement process are greatly reduced, and the safety of the measurement personnel is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of maintenance of axial flow turbines, in particular to a method for measuring the uniformity and synchronization of blade openings. Background technique [0002] With the vigorous development of hydropower, my country's current total installed capacity has already ranked first in the world, and the goal is to reach 380 million kilowatts in 2020, which effectively solves the shortage of electricity in my country. As the most important equipment in a hydroelectric unit, the quality of its operation and maintenance directly affects the safe and stable operation of the entire unit, especially in the case of long-term continuous operation. [0003] The measurement of the uniformity and synchronization of the blade opening during the maintenance of the axial-flow propeller unit is of great significance for understanding the connection of the internal mechanism of the runner body. At present, the blade opening me...

AI Technical Summary

Problems solved by technology

[0004] (1) During the measurement process, the surveyor is located inside the seat ring or between the movable guide vanes to observe and record, and the risk of slipping, mechanical injury or even falling from a high altitude is relatively high;

[0005] (2) Factors such as manual observation and recording of the measurement, imprecise rotation of the blade to a specific opening, etc. will lead to inaccurate measurement results and large errors;

[0006] (3) Before the measurement, the surveyor needs to stand on the blade, and paste the corner scale paper on the edge of the hub. The standing point is at a position with a large slope of the blade. Posting the scale paper will cause the operator to be in the risk of slipping and working at heights for a long time ;

[0007] (4) To measure the blade opening, it is necessary to select a specific opening point in the whole stroke of the switch. The blade moves when it stops and moves, the measurement result is not linear, and the characterization of the synchronization of the blade opening is not accurate enough; and the number of measurement opening points Limited, which is not conducive to the discovery of problems such as blade movement frustration;

[0008] (5) The measurement process is located in the volute for a long time, and the number of measurement personnel is limited, so that the measurement personnel need to go around the seat ring at the edge of the high place, and observe and record the opening of each blade at a specific opening point in turn , the entire measurement step should be repeated 2-3 times to ensure the accuracy of the test data, the work efficiency is not high and the operation risk is further increased

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