SU387483A1 - ELECTRIC MACHINE STATOR - Google Patents

Description

one

A stator of an electric machine, in particular a turbogenerator, is known, comprising a housing, on the inner surface of which longitudinal ribs and laminated core are installed.

The aim of the invention is to increase the reliability and simplify the construction of the stator.

For this purpose, the stiffening ribs are made split in the radial direction and consist of two opposing wedges. The movable parts of the stiff ribs in their end parts are provided with protrusions. The length of the fixed parts of the ribs is equal to the length of the active steel of the stator core.

The invention is illustrated in the drawings.

FIG. 1 shows a longitudinal section of the stator; in fig. 2 is a longitudinal section of the stator in the case when the moving parts of the composite Longitudinal ribs are separated in length into two parts; in fig. 3 is a cross-sectional view of LO-A (FIGS. 1 and 2) in the case when the blending is applied to the fixed parts of the composite ribs; in fig. 4 is a cross-sectional view along the A-L (Figs. 1 and 2), in the case where the blending is led to the moving parts of the composite ribs; in fig. 5 - node I.

Fixed parts of 2 longitudinal extension ribs are welded to the stator housing 1; they have, for example, a box-shaped length

cross section. In the lower parts of the ribs there are movable parts 5 of these ribs.

On the fixed parts of the longitudinal extension ribs 2 (Fig. 2) or on the movable parts 3

These ribs (Fig. 3) our core 4 of the stator. The cylindrical ends of the movable and stationary parts of the longitudinal extension ribs, threaded, extend beyond the ends of the pressure plates 5 fastening the laminated

the core 4 in the axial direction with the help of nuts 6. Across the –plane interface of the movable and fixed parts of the longitudinal tension ribs, a slope is made. In the case of moving parts 3

longitudinal rib ribs divided in length to two parts (Fig. 2), the cylindrical ends of the two moving parts of the rib ribs extend beyond the ends of the pressure plates fastening the liner core in the axial direction. But both the interface planes of the moving parts with the fixed ones are bent. The moving parts of each of the tension ribs are moved in opposite directions from the middle of the stator core.

The slope of the interface planes of the moving and stationary parts of the longitudinal edges and the value 1 of the displacement of the sub-parts for each specific machine are determined depending on the specified clearance for

3

blends and the required tension between the core and the stator housing, which, in turn, is determined by the magnitude of the vibration amplitude of the active steel of the stator core. To limit the amount of movement of the moving parts relative to the fixed ones, windows 7 are made in the latter (Fig. 5), and in the moving parts, the protrusions corresponding to them 8 are executed. The value of the displacement is regulate with 1 TRACK inserts 9.

On the 8th shaft of the stator core 4, the moving parts of the ribs 3 are exposed relative to the fixed parts .2 and secured in a known manner, for example, to the fixed parts using copper rivets (not shown) so that between the stator core and the moving parts 3 the necessary clearance allows the freedom to install the segments on the composite longitudinal tensioning ribs.

After final pressing of the stator core, without relieving the pressure of the press, using the nuts 6, move the axial parts of the 3 ribs up to the stop, i.e. until the moving parts of the ribs with the fixed parts of the 2 ribs or with the stator case are engaged, depending on the design hook As in the interface plane of the fixed parts 2 and movable 3, the slope is made, the moving parts moving axially with nuts 6 will also move radially towards the core, creating a radial thrust between the core and the stator housing.

In this case, due to the presence of a sufficiently wide plane of conjugation of the tension ribs with the stator core and large radial forces developed by the tension ribs, the core will be reliably fixed in the tangential direction. Thus, with the help of the compacted extension ribs, the core will simultaneously be compressed in the axial direction and securely fastened in the radial and tangential directions. If necessary, adjust the size of the radial tension with the help of inserts 9.

Subject invention

1. Stator of an electric machine, in particular a turbogenerator, comprising a housing, on

The inner surface of which has longitudinal ribs and a laminated core, characterized in that, in order to increase reliability and simplify the design, the clamp ribs are made detachable in

radial direction and consist of two opposing wedges.

2. A stator no. 1, characterized in that, in order to limit the movements of the moving parts of the ribs, their end parts are provided with protrusions.

3.Stator on PP. 1, 2, characterized in that the fixed parts of the ribs have the same length as the active core steel of FIG. 1