RU1836781C - Method of assembly of an electric machine - Google Patents

Abstract

Usage: electrical engineering, manufacturing technology of electrical machines. SUMMARY OF THE INVENTION: Before assembling the stator on a vertical plate, an assembly is assembled from one of the stator support shields, the shield of one of the fans and the housing of one of the bearings. A technological cover is fastened on the assembly. The cover has a guide element, the center of which is offset from the stator axis by no more than half the size of the clearance gap of the labyrinth seal of the electric machine. After assembly, the assembly is rotated through an angle of 180 ° and mounted on a support, then the stator is assembled on the plate, the bases of the support shields are fastened to it by clamps. The rotor is inserted into the stator when the shaft is upright, the rotor is centered, the shield of another fan and the housing of another bearing are mounted, and the latter is assembled. Working liners are inserted into the lower bearing, and the assembly of the remaining elements of the electric machine is carried out with the rotor shaft horizontal. 2 ill.

Description

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The invention relates to technology and technological equipment for assembling large electrical machines and can be used in the electrical industry.

The purpose of the invention is to reduce the complexity of the assembly and improve the quality of the assembly by preventing the rotor shaft from bending.

Figure 1 is a cross section of an electric machine along the axis of symmetry, - figure 2 is a complete machine.

The fan shield 2 is attached to the support shield 1, the bearing housing 3 with the labyrinth seal 4 and the technological cover 5 is fixed to it. The assembled assembly is rotated through an angle of 180 ° and placed on the support, its support plane is pressed against the plate by clamps. Then, a stator 7, a second support shield 8, is connected to the support shield

the supporting plane is pressed to the plate with clamps. A guide technological housing 9 is attached to the end of the rotor shaft, and two technological inserts 10 are mounted on the bearing neck of the rotor shaft and fastened by an annular technological spring 11.

The rotor 12 is vertically inserted into the bore of the stator 7 and placed on the plane of the technological cover 5. The technological cover 5 has a guiding center 6, the axis of which is shifted by K to the side opposite to the supporting planes of the stator. When the rotor is inserted into the stator, the technological cone 9 and technological inserts 10 provide the direction of movement of the rotor shaft through the labyrinth seal of the bearing 4, and the technological cone 9 determines the axial position

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rotor and provides running clearance K, i.e. the possibility of free winding the bearing shell. A fan shield 2 is mounted in the groove on top of the stator support shield, the bearing housing 3 with its labyrinth seal 4, bearing liners are installed, the bearing cover 14 is fixed and the bearing is completely assembled. The technological liners 10 are removed from the neck of the second rotor shaft bearing and the working liners of the bearing 13 are installed. Then the machine stator is unfastened from the plate, installed horizontally on the mounting plates 15, the mounting plates are fixed to the machine stator, the technological cover b and the technological cone 9 are removed completely assemble the bearing. install the air cooler 17 and completely assemble the electric machine with the horizontal position of its axis.

The invention will improve the assembly technology of large electric machines, improve the quality of machines by reducing the permissible level of vibration of the machines during their operation by preventing the rotor shaft from bending when the rotor is inserted into the stator by known methods, and save the technological data of electric machines for a longer operational period.

Claims (1)

SUMMARY OF THE INVENTION A method of assembling an electric machine, according to which a stator with supporting shields is assembled on a plate, the rotor is inserted into the stator, the fan shields are mounted on the rotor shaft, fastened to the bearing shields of the stator of the bearing housing, the rotor is centered, and the valve shields are fixed to the supporting shields tori, assemble bearings and install an air cooler, so that and, in order to reduce the complexity and improve the quality of assembly by preventing the shaft and rotor from bending, before assembling the stator, a shield of one fan is mounted on top of the plate in one of its support shields, and then the housing of one of the bearings is mounted and the technological cover is fixed on it, the center of the guide element of which is offset relative to the axis of the stator no more than half the size of the clearance gap of the labyrinth seal of an electric machine, turn the assembled assembly through an angle of 180 ° and install it on a support, and then assemble the stator with support shields when vertically position of its axis are calibrated stator support plane on the plate mounted vertically, and fasten the base of the stator support plates to the plate with clamps, rotor is inserted into the stator with the vertical position of its shaft, the rotor is centered, the shield of the other is installed fan and the housing of another bearing and assemble the latter, insert the working liners into the lower bearing, and the assembly of the remaining elements of the electric machine is carried out with the rotor shaft horizontal. I / wnmtu pc L..J 18Ј9Sh about 7 Q U9..2. 46