SU1048548A1 - Electric machine with hydrogenous cooling - Google Patents

Abstract

ELECTRIC MAIHWIA WITH HYDROGEN OXYLES} SCHE1 {IEM, containing rotor shaft, stator housing, oil seal. Sealing with oil catch, drain chamber and drain pipe, in order to increase the reliability by preventing oil from entering the internal cavity, The drain chamber is installed with a gap relative to the shaft at least one intersecting partition, located between the oil seal and the oil trap and fixed to one of the indicated elements. (L 1 X L X)

Description

The invention relates to electromotive construction, in particular to electric mosquitoes, for example hydrogen-cooled turboheaters.

Turbogenerators are known in which labyrinth seals are installed in the stator housing to prevent the M & tna from falling into the stator housing from the housing; Various types of separation devices are also used, which ensure the separation of oil droplets and their discharge into the drainage system Q

In these designs, there are cases when oil in contact with hydrogen splashes and forms stable aerosols which, spun by the rotor shaft, create a zone of povyshenyy pressure in the drain chamber.

Oil under the action of this pressure penetrates into the turbogenerator case through labyrinth seals, in the form of vapor and oil film.

Closest to the present invention is an hydrogen cooled electric machine comprising a rotor shaft, a stator housing, an oil seal with an oil trap, a drain chamber and a drain pipe 2.

The oil catcher consists of a series of rings, on the inner surface of which there are scallops forming a labyrinth seal. In the area of the scallops there is an insert that is pressed to the shaft by a spring

In these machines, the oil moving along the shaft towards the housing, in the form of a film in the gap between the shaft and the labyrinth seal, encounters an insert in contact with the shaft and is led into the drain chamber.

The presence of a film stripping insert on the rotor shaft in contact with the shaft does not ensure complete discharge of oil into the drain chamber. Part of the oil in the form of vapor under the action of increased pressure in the drain chamber through the gap between the labyrinth seal and the rotor shaft penetrates into the internal cavity of the turbogenerator. Oil, falling on the stator winding, eats away its insulation, which reduces winding life and reliability.

The purpose of the invention is to increase the reliability of the electric pump by preventing the ingress of oil into its internal cavity.

This goal is achieved by the fact that in an hydrogen-cooled electric machine containing a rotor shaft, a stator housing, an oil seal with an oil catcher, a drain chamber and a drain pipe, in the drain chamber is installed with a clearance relative to the shaft between the oil seal and the oil separator and is fixed on one of the indicated elements.

FIG. Figure 1 shows a section of the assembly, the oil seal of the electric machine along the longitudinal axis of the rotor; Fig. 2 shows a section A-A in Fig. 1 of an oil seal assembly of an electric machine along a transverse axis of the rotor.

The hydrogen cooled electric machine contains a rotor shaft 1, a stator housing 2, an oil seal 3 with an oil catch 4, a drain chamber 5 and a partition 6 installed along the longitudinal axis of the rotor shaft with a clearance of 7 relative to the shaft and and drain pipe 8,

During the operation of the machine, the oil enters the rotor shaft 1 into the drain chamber 5 of the oil seal 3, is sprayed, forming stable aerosols braked by partitions 6 from the unscrewing of the rotor shaft. As a result of pressure equalization in the stator housing 2 and the drain chamber 5, by eliminating the twisting of aerosols, the latter are deposited on the walls of the drain chamber 5 and partitions 6 and flow into the drain pipe 8,

A-A 1

12

Claims (1)

HYDROGEN COOLED ELECTRIC Raspberry, comprising a rotor shaft, a stator housing, an oil seal with an oil trap, a drain chamber and a drain pipe, characterized in that, in order to increase reliability by preventing oil from entering the machine’s internal cavity, the drain chamber is installed with a clearance relative to the shaft at least one septum overlapping it, located between the oil seal and the oil trap and mounted on one of these elements. . ·. ^eleven