SU1705963A2 - Electric machine - Google Patents

Abstract

The invention relates to electrical engineering and can be used in gas-cooled electric machines and in vacuumized electric machines. The purpose of the invention is to increase reliability. The electric machine comprises a rotor shaft 1, an oil trap housing 2, a drain chamber 3, an oil seal 4, a magnetic fluid seal consisting of an annular magnet, magnetic conductors fixed in the oil trap housing with non-magnetic material bushings, and a ferrofluid. A pipeline with a cassette filter 10 is installed in the upper part of the oil trap housing, which connects the drain chamber with the internal cavity of the electric machine. Due to the axial displacement of the shaft with a magnetically conductive material that is in direct contact with the magnetic-liquid seal, the gap in the movable connection between them is sealed with an elastic ring 13 in the form of a rubber ring, and the sleeve is provided with a tooth fixing it from turning , and has at least one flange 16, which, when axially moving the shaft, is supported by bearings 17. fixed on the stator, to move along with the shaft, left end. 1 il. SO with

Description

The invention relates to electrical engineering and is an improvement on the author. St. No. 1474801.

The purpose of the invention is to increase reliability. 5

The drawing shows the proposed electric machine.

The electric machine comprises a rotor shaft 1, an oil trap body 2, a drain chamber 3, an oil seal 4, a magneto-liquid seal, consisting of an annular magnet 5 and magnetic cores 6, fixed in the oil trap body 2 by bushings 7 of non-magnetic material, and 15 ferrofluid 8. In the upper part case 2 oil trap installed pipe 9 with a cassette filter 10, connecting the drain chamber 3 with the internal cavity 11 of the electric machine. On the shaft 1 with the possibility of axial movement mounted sleeve 12 of a magnetic material. The gap in the movable connection between them is sealed by an annular movable seal 13. The sleeve 12 is equipped with a tooth 25 14, which has the ability to move in the axial direction in the groove 15 on the shaft

1. The sleeve is also provided with at least one ring shoulder 16. On the stator of the electric machine, bearings 17 are mounted against the shoulders 16.

With the axial displacement of the shaft 1, the sleeve 12 abuts against the bearing 17 with its shoulder 16, which prevents its further displacement relative to the stator of the machine and causes displacement relative to the shaft 1. The elastic ring seals 13 provide sealing of the gap between the shaft 1 and the sleeve 12.

Thus, the proposed construction allows to keep the increased pressure drop between the internal cavity of the machine and the environment and prevent the removal of magnetic fluid from the working area, i.e. provides increased machine reliability.

Claims (1)

Claim Electric car by ed. St. No. 1474801, characterized in that, in order to increase reliability, a sleeve of magnetic material is mounted on the rotor shaft of the torus directly contacting with the magneto-fluid seal and having axial movement relative to the shaft, and the gap between the sleeve and the shaft is sealed by a movable contact seal, the sleeve being fixed from rotation relative to the shaft and has a collar that interacts with bearings on the stator of the electric machine during axial movements of the shaft. Compiled by L. Kartseva Editor A. Ogar Tehred M. Morgenthal Corrector Father Kravtsova Order 201 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.