阅读说明：本技术 一种发电机机座的底脚垫片的调节方法 (Method for adjusting foot gasket of generator base ) 是由 刘玉鑫 程明 王宏光 李泽华 马骏 王健 马连波 杨辉 高世明 王贵彬 周作发 于 2021-04-21 设计创作，主要内容包括：本发明公开了一种发电机机座的底脚垫片的调节方法,调节方法包括：抬升发电机机座,并在发电机机座的多个支撑底脚的筋板上设置应变片；将多个应变片连接至应变仪；使发电机机座降落至地面上,并利用应变仪测量各个支撑底脚的实际承载量分布值；抬升发电机机座,并根据各个支撑底脚的预设承载量分布值与实际承载量分布值之差来调整在支撑底脚的接触面上设置的垫片的数量。本发明解决了目前难以分配发电机机座的重量载荷的问题。(The invention discloses a method for adjusting a foot gasket of a generator base, which comprises the following steps: lifting the generator base, and arranging strain gauges on rib plates of a plurality of supporting feet of the generator base; connecting a plurality of strain gauges to the strain gauge; enabling the generator base to fall to the ground, and measuring the actual bearing capacity distribution value of each supporting foot by using a strain gauge; and lifting the generator base, and adjusting the quantity of the gaskets arranged on the contact surfaces of the support feet according to the difference between the preset bearing capacity distribution value and the actual bearing capacity distribution value of each support foot. The invention solves the problem that the weight load of the generator base is difficult to distribute at present.)

1. A method of adjusting a foot washer of a generator housing, the method comprising:

lifting the generator base, and arranging strain gauges on rib plates of a plurality of supporting feet of the generator base;

connecting a plurality of said strain gauges to a strain gauge;

enabling the generator base to fall to the ground, and measuring the actual bearing capacity distribution value of each supporting foot by using the strain gauge;

and lifting the generator base, and adjusting the number of the gaskets arranged on the contact surfaces of the support feet according to the difference between the preset bearing capacity distribution value and the actual bearing capacity distribution value of each support foot.

2. The method of adjusting of claim 1, wherein attaching a strain gauge to the strain gage comprises:

connecting a plurality of strain gauges to one terminal of a resistance pre-adjusting balancing box;

connecting the other terminal of the resistance trimming tank to the strain gauge.

3. The method of adjusting of claim 2, wherein prior to lowering the generator frame to the ground and measuring the actual load distribution of each of the support feet with the strain gauges, the method further comprises:

and repeatedly lifting and dropping the generator base to release the unstable stress of the rib plate until the cardinal number of the strain gauge connected with the strain gauge is kept stable.

Technical Field

The invention relates to the technical field of generators, in particular to a method for adjusting a foot gasket of a generator base.

Background

In the power generation industry, the stable and safe operation of the generator has very important significance. The generators commonly used today are end-cap bearing supported rotors. When the generator runs, the stator base and the bearing bear the electromagnetic vibration transmitted by the vibration isolation structure and also bear the mechanical vibration generated when the rotor rotates.

In order to support the weight of the generator and the mechanical vibration generated when the rotor rotates, the generator has certain requirements on the installation connection of the engine base and the distribution of weight load. However, the thickness of the gasket below the feet of the generator base can only be simply adjusted at present, and the weight load distribution requirement of the base is not considered by the method, so that the distribution of the weight load of the generator base is difficult to control, the support rigidity of the generator base and the end cover is greatly reduced, and the unit vibrates greatly after operation, and the safe operation is influenced.

Disclosure of Invention

In view of the defects of the prior art, the invention provides the following technical scheme.

The invention provides a method for adjusting a foot gasket of a generator base, which comprises the following steps:

lifting the generator base, and arranging strain gauges on rib plates of a plurality of supporting feet of the generator base;

connecting a plurality of said strain gauges to a strain gauge;

enabling the generator base to fall to the ground, and measuring the actual bearing capacity distribution value of each supporting base foot by using the strain gauge;

and lifting the generator base, and adjusting the number of the gaskets arranged on the contact surfaces of the support feet according to the difference between the preset bearing capacity distribution value and the actual bearing capacity distribution value of each support foot.

Preferably, a strain gauge is connected to the strain gauge, and the strain gauge comprises:

connecting a plurality of strain gauges to one terminal of a resistance pre-adjusting balancing box;

connecting the other terminal of the resistance trimming tank to the strain gauge.

Preferably, before the generator base is lowered to the ground and the actual load distribution value of each support foot is measured by the strain gauge, the adjusting method further comprises:

and repeatedly lifting and dropping the generator base to release the unstable stress of the rib plate until the cardinal number of the strain gauge connected with the strain gauge is kept stable.

By adopting the method for adjusting the foot gasket of the generator base, provided by the invention, the weight load of each foot of the generator base can be reasonably distributed, so that the whole generator set is in a stable supporting state, and the problems that the weight load distribution of the feet of the generator base is unreasonable and the complete function of the generator set cannot be ensured due to the manual increase and decrease of the gasket at present are solved.

Drawings

FIG. 1 is a flow chart of a method of adjusting a foot washer of a generator housing according to an embodiment of the invention;

FIG. 2 is a schematic view of a foot structure of a conventional generator frame;

FIG. 3 is a wiring diagram of a quarter-bridge in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the drawings are exemplary only, and the invention is not limited to these embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the attached drawings, and other details not so relevant to the present invention are omitted.

In view of the problems of the prior art described in the background, the following embodiments are used.

Referring to fig. 1 and fig. 2, the method for adjusting a foot pad of a generator base according to the present embodiment includes:

and S1, lifting the generator base A, and arranging strain gauges on rib plates 11 of a plurality of supporting feet 1 of the generator base A. The strain gauge is used for detecting the strain amount of the rib plate 11 caused by the weight of the generator set. Specifically, the fixing device of the generator base A and the ground is released, the generator base A is lifted by a jack, then strain gauges are attached to the rib plates 11 of the supporting bottom feet 1 by glue after the surfaces of the rib plates 11 are polished, and the number of the strain gauges attached to each substrate is at least 3.

Step S2, connecting a plurality of the strain gauges to a strain gauge (not shown in the figure). Specifically, a plurality of the strain gauges are connected to one terminal of a resistance pre-tuning balancing box (not shown in the figure), and the other terminal of the resistance pre-tuning balancing box is connected to the strain gauge, so as to form a quarter-bridge circuit (as shown in fig. 3), and increase the temperature compensation speed for temperature compensation.

And step S3, enabling the generator base A to fall to the ground, and measuring the actual bearing capacity distribution value of each support foot 1 by using the strain gauge. Specifically, in order to reduce the error of the strain amount of the plate ribs, before the actual load distribution value of the support foot 1 is measured, the generator base a is repeatedly lifted and lowered, so that the unstable stress of the rib plate 11 is released until the base number of the strain gauge connected with the strain gauge is kept stable (the base number of the strain gauge is kept 0).

Step S4, lifting the generator base a, and adjusting the number of the spacers B arranged on the surface of the bottom plate 12 of the support foot 1 facing the ground according to the difference between the preset load distribution value and the actual load distribution value of each support foot 1. When the number of the gaskets B is adjusted, the centering data of the steam-generator pair wheel also needs to be considered, so that the problem that the axle center of the generator rotor deviates is avoided.

By adopting the method for adjusting the footing gaskets of the generator base, provided by the embodiment, the weight load of each footing of the generator base can be reasonably distributed, so that the whole generator unit is in a stable supporting state, and the problems that the weight load distribution of the footing of the generator base is not reasonable and the function stability of the complete generator unit cannot be ensured due to the fact that the gaskets are increased or decreased manually at present are solved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.