Static balance method for runner of axial-flow water turbine

A technology of static balance and runner, which is applied in static/dynamic balance test, machine/structural component test, measuring device, etc. It can solve the problems of a large number of tooling and sites, unsuitable site use, and difficult transfer of devices. Achieve the effect of being convenient to use on the construction site, easy to promote, and easy to operate

Inactive Publication Date: 2014-02-12
HARBIN ELECTRIC MASCH CO LTD
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  • Abstract
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Problems solved by technology

At the same time, the above methods require a lot of tooling and site support, and the device is not easy to transfer, especially not suitable for site use

Method used

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  • Static balance method for runner of axial-flow water turbine

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Embodiment Construction

[0013] A static balancing method for an axial flow turbine runner. The products and tool parts participating in the balance must be cleaned of oil and burrs. When assembling the mating surface, oil must be applied to prevent the surface from being scratched. Then, the lifting tool and the runner are assembled and combined. Use large-scale lifting equipment such as steam cranes or straddle trucks to lift the balance tool and the test runner, find out the approximate orientation of the unbalanced moment, and assemble the blades according to the orientation of the unbalanced moment and the weight of the blade. The maximum eccentricity requirement is not greater than 50mm. A total of 3 trimming experiments were performed, each rotation was 2 times, the actual trimming was performed 6 times, and the lifting tool was rotated to 6 directions. The first trimming: a) trim at 0° position, b) turn 180° for trimming; the second time Trim: a) trim at 90° position, b) turn 180° for trim; thi...

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Abstract

The invention discloses a static balance method for a runner of an axial-flow water turbine. A lifting tool and the runner are assembled and combined, balancing is performed one time according to a test principle to find out a general direction of an unbalanced moment, blades are assembled according to the direction of the unbalanced moment and weights of the blades, the balancing is performed three times, and the balance of the runner is finally realized. The static balance method has the characteristics of high universality, simplification and convenience of operation, good repeatability and convenience in use in a construction site, and the static balance of the runner of the axial-flow water turbine used in the construction site can be satisfied.

Description

Technical field: [0001] The invention relates to a method for static balancing of a runner of an axial flow water turbine. Background technique: [0002] The runner of the water turbine is the core component of the hydroelectric generator set. The runner runs at high speed during operation, and there are strict requirements on the unbalance of the runner. Before the turbine runner leaves the factory, static balance experiments must be carried out to check and eliminate the unbalance, so as to ensure the safe and stable operation of the unit. [0003] At present, the common static balancing techniques for turbine runners include steel ball-mirror plate static balancing, hydraulic static balancing, three-point weighing static balancing and other devices and corresponding methods. However, these devices and methods have their limitations. Among them, the steel ball-mirror plate static balance is only suitable for runners with small diameter and light weight. When the weight o...

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Application Information

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IPC IPC(8): G01M1/38
Inventor 高建刚吕以建杨旭黄海玉张艳红金玉翟志顺冯慧奇智连玮刘向海
Owner HARBIN ELECTRIC MASCH CO LTD
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