Centring method in process of mounting generator rotor in threading mode

A generator rotor and rotor technology, applied in the direction of adjusting/balancing rotors, measuring devices, using optical devices, etc., can solve the problems of difficulty in ensuring the coaxiality of the rotor and the stator, damage to the coil, insulation damage, etc., to achieve the centering state Intuitive and clear, reducing requirements and good directionality

Active Publication Date: 2013-09-11
NINGBO FUSHIDA ELECTRIC ENG
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the coaxiality between the rotor and the stator is difficult to ensure in the existing large-scale generator rotor installation method, so that the rotor and the stator are prone to damage the insulation layer of the coil due to friction and collision, resulting in ins

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  • Centring method in process of mounting generator rotor in threading mode
  • Centring method in process of mounting generator rotor in threading mode
  • Centring method in process of mounting generator rotor in threading mode

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048] A method for centering a generator rotor in assembly according to the present invention comprises the following steps:

[0049] a) In the first step, vertically set a piece such as image 3 In the target plate 3 shown, there is a bull's-eye through hole 32 at the center of the target plate, and the bull's-eye through-hole is located on the center line of the stator.

[0050] Specifically, we can use existing measurement tools to measure the inner diameter of the stator in the horizontal and vertical directions, and position the bull's-eye through hole at the center of the inner diameter of the two directions, so that the bull's-eye through-hole is basically guaranteed to be located on the center line of the stator . Of course, we can also use the following method to make the bull's-eye through hole located in the center of the end face...

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Abstract

The invention discloses a centring method in the process of mounting a generator in a threading mode. The centring method comprises the steps of arranging a laser emitter on each side of the rotor, enabling the two laser emitters to be opposite to each other, adjusting the positions of the laser emitters to enable the laser beams emitted by the laser emitters to be located on the central line of a stator, arranging centring target boards at the two ends of the rotor correspondingly, arranging a circular centring ring at the position corresponding to the rotor central line, and keeping the imaging points of the laser beams on the centring target boards to be in the circular centring ring when the rotor is mounted in the threading mode. Therefore, the rotor is kept to be coaxial with the stator, and friction and collision are avoided. By means of the centring method in the process of mounting the generator in the threading mode, the coaxiality of the rotor and the stator can be observed and confirmed rapidly and conveniently, on-site coordination and command can be conducted conveniently when the rotor is mounted, and the rotor is guaranteed not to rub or collide with the stator in the whole mounting process.

Description

[0001] technical field [0002] The invention relates to the technical field of installation of large generators, in particular to a method for centering a generator rotor when it is inserted into a stator, so as to avoid collision and friction between the rotor and the stator. [0003] Background technique [0004] During the installation process of large generators in the power industry, the stator part is usually fixed first, and then the rotor is slowly inserted into the stator from the turbine side or the exciter side of the stator. The air gap between the generator stator and the rotor is very small. Small, generally only about 15 mm, too large or too small air gap will affect the efficiency of the generator, for this reason, people have thought of a variety of methods to ensure that the installed rotor can maintain a high degree of coaxiality with the stator. For example, a "rotor centering system and method" disclosed in the Chinese patent literature, the authorized...

Claims

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Application Information

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IPC IPC(8): H02K15/16G01B11/27
Inventor 张斌立陈朝阳
Owner NINGBO FUSHIDA ELECTRIC ENG
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