SU1424098A1 - Electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to improve cooling and size reduction. The electric machine comprises a rotor with a hollow shaft 1, current leads 7, a winding 4, and sub-spacers with a common oil line. Due to the fact that the oil line is placed along the axis of the shaft and attached to the sleeve 13 with guide elements, inside of which the current leads 7 are placed, the goal is achieved. 3 il.

Description

WITH

city of

The invention relates to electrical engineering, in particular to large electric machines having a current supply to the rotor winding from contact rings and liquid circulating bearing lubrication.

The aim of the invention is to improve cooling and size reduction.

FIG. 1 shows an electric machine, a longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The rotor shaft 1 of the electric machine has a sliding current collection point 2. On the shaft 1, there is a rotor core 3 with a winding 4. A sliding current collection node 2 is connected to the rotor winding 4 by means of a topper, consisting of sub-buses 5, main buses 6 and a pin current lead 7. Three main buses 6 are placed in an axial channel 8 symmetrically, each of them has a body insulation and is located in its fixing-guiding element 9, such as a channel bar. The elements 9 are fixed in the upper part in the axial grooves 10 of the sleeve 11, and in the lower part with a pin-type current lead 7.

To circulate the liquid lubricant from the lower bearing to the upper one (not shown), a pipe 12 is attached along the shaft axis, adjacent to the axial channel 13 of the sleeve 11 connected to the radial channels 14 that extend into the pressure chamber 15.

Elements 9 are guides for the current assembly of the current lead assembly. The main LINES 6 and the elements 9 are fixed in the slots 10 of the bushings 11 and inserted into the axial channel 8 of the shaft 1. Then the pin current lead 7 is connected to the tires 6 by means of conductive pins Having a tapered thread at the ends,

When the vertical electric machine operates, the centrifugal forces create a hydraulic pressure in the radial channels 14 and the liquid lubricant starts to circulate from the lower bearing oil bath to the upper bearing oil bath through the pipe 12. At the same time, the main tires 6, which are located in the fixing-directional direction elements 9 adjacent to the pipe 12. The same parts of the main busbars 6 are cooled, which are located in the zone of the most unfavorable conditions for cooling - in the zone of the pin current lead 7.

The execution in the axial channel of the electric machine shaft of a three-phase current lead to the rotor winding and the channel for circulating bearing lubrication reduces the size of the electrical machine and improves the cooling of the current lead, especially in its lower part, in the zone of contact with the pin tox supply.

Claims (1)

Invention Formula An electric machine containing a rotor with a hollow shaft, a core with a winding placed in it, welded current leads to the rotor winding placed inside the hollow bar, and bearings located on opposite sides of the rotor core, united by a common oil pipe, which is different In order to improve cooling and reduce overall dimensions, inside the hollow shaft on the side of the current leads there is a sleeve, on the outer surface of which axial grooves are located with directional elements of channel type with reversing The inside of the base, inside of which are placed the current leads, and the oil pipe to the bearings is located along the shaft axis and fixed to the sleeve.