SU780104A1 - Multi-phase synchronous electric machine - Google Patents

Description

(54) METHOD OF FIXING THE STATOR OF THE ELECTRIC MACHINE TO THE BASE

The invention relates to electrical engineering, in particular to the methods of fastening electrical machines, for example hydrogenerators, to a concrete foundation. There is a known method of fastening the stator of the hydrogenerator to the foundation using foundation plates, in which the foundation plates are connected to the lower shelf of the stator housing with bolts and cylindrical pins when drilled together, the pins are placed radially at the junction ;. Kopv is mounted with a base plate to provide free thermal expansion of the stator, then the bottom shelf with base plates is welded to the stator housing and put in a permanent place in the assembled unit, i.e. on a concrete base; and fasten to it with bolts, the cototail is subsequently sewn up with concrete. RZ: This method has the following disadvantages. Joint tapping of the base plates with the bottom shelf of the stator housing and the drilling of bolt holes in the shelf is very laborious and requires special machines and large production areas. In addition, during subsequent welding of the lower flange to the stator housing, the radial location of the pin, the position of the plates relative to the generator axis, and the relative position of the bolt holes may be disturbed. This will lead to the fact that when mounting the stator to hydroelectric power stations, the foundation bolts do not fall into the corresponding penalties of the foundation, it will be necessary to digest the plates, grind out the fine or increase the holes s of the foundation slab for the foundation bolts. Radial pin placement will cause the stator to deform when heated. There is also known a method of fastening the stator of an electric machine to the foundation, in which the foundation plates are fixed to the foundation with bolts, then the stator of the electric machine is installed on the foundation plates. In the foundation plates, bolt holes and radial pins are drilled along with the lower stator flange, which have in the junction of the stator housing with the base plate and fix the position of the stator radial pins I2j ..

Base plates are placed on the foundation around the circumference in accordance with the marking applied on them and at a given distance from the center of the unit.

After installation of the stator, the hydrodynamic center is centered on its position by moving the foundation bolts and moving the plates within the bolt holes. .

The disadvantage of such a method of fastening the Stator to the foundation is that the plates can be set exactly only on height. -; Ch- ----- g: -g --- - ..; -; - - -,: - ----- Mismatch of the threaded holes in the plate and the holes for the bolts in the guide {T. may be so significant that adjustment by moving the foundation bolts and moving the plates within the bolt holes may be sufficient will need to digest the slab concrete razdalbivat indent or increase the bolt holes in the plate, and then overlap the thick plate and its final weld. . . -, . ,

All this increases the labor intensity. Preparatory work for installing a hydrogenerator on the foundation and increase -. he runs a cycle of muntazhnyh works. ;

Of the known constructions, Bto- is the closest to the invention.

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The purpose of the proposed method is to reduce the labor intensity and reduce the assembly cycle.

The goal is achieved in that the foundations of the plates are made of composite parts with thickness of me. Two parts, connecting both parts of the plate with bolts, place fixing pins in the interface of both parts, center the stator on the machine and weld the stator and the part connected to it. foundation.

The invention is illustrated in the drawing, i in which figure 1 shows the elements of fas 780104.

electric machine laziness to the foundation; Fig.2 is a top view of the same elements.

The stator housing 1 has a lower shelf 2. The base plate consists of two parts - the top 3 and bottom 4 and is attached to the foundation with studs 5 and nuts 6. Both parts of the plate, top 3 and nyssn; 4 installed bolts 7 in the interface of both parts of the plate, On; the junction in the rear direction {The locking pins are located 8..

The bottom shelf of the stator housing 2 of the hydrogenerator is welded to the top of the plate 3.

The method of fastening the stator to an electric machine allows not increasing the consumption of materials., Significantly reducing the labor intensity of manufacturing. To free up assembly production areas, and also to reduce the cycle of installation work when installing a hydraulic generator at hydroelectric power plants.

Claims (2)

Invention Formula The method of fastening the stator of an electric machine to the foundation, in which the foundation plates are fastened to the foundation with bolts, then the stator of the electrical machine, whose position is fixed by radial pins, characterized in that, in order to reduce labor intensity and reduction cycle of mounting operations, the foundation the plates are made of composite parts of two, parts, bolt both parts, place fixing pins in the interface of both parts, center the stator about the axis The machines and the stator is welded to a mating with him part of the plate. . Information sources, . taken into account in the examination 45 1, Dombrowski, c. V., Fetinko FM and others. P1project p6Vanya Hydrogenerators,; L., Energie, 19U8, pp.40-43.  2. Polushkin KP Installation of hydro. L., Energie, 1977, p.247. /