SU97922A1 - Electric Refrigerated Machine - Google Patents

Description

The ventilation losses of electric machines, due to the presence of intense parasitic circulation of air, is one of the reasons for the significant reduction in the efficiency of these machines.

The device of the proposed machine provides a reduction in the ventilation notes by reducing the free space around the side surfaces of the rotor and reducing the effect of the ventilating action of the spokes and side surfaces of the rotor.

The drawing shows schematically the device of the machine.

The rotor / is made with smooth side walls 2 in which openings 3 are provided for the passage of a stream of air into the radial channels 4 arranged in the rim 5 of the rotor (the gaps between the steel segments from which the rim is assembled play the role of the radial channels).

Holes 3 are located at the inner diameter of the rim. Adjacent to the side walls of the rotor in the immediate vicinity of them are fixed flat shields 6, which are installed as follows.

that during the rotation of the rotor the possibility of touching the shields on the side walls of the rotor is excluded.

To reduce the heating of the air in the gap between the nonwired beam and the side wall of the rotor, a stream of air is supplied through the channel 7 moving through this gap due to the ventilating action of the rotating wall of the rotor. From the air gap 8, the air stream is directed to the radial channels of the rim, the radial channels of the stator and, after passing through the air cooler 9, returns again to the air gap.

The movement of the air stream in the air gap 5 and 0 on. the drawing is shown by arrows.

The air jet is carried by the paddles //, and having passed through the interpolar gaps and four radial channels of the stator 12, enters the air cooler 9.

The reduction in space through the use of shields 6 allows hydrogen or other gas to be used instead of air for cooling.

The described device can be used in hydrogenerators. In this case, the compaction

are supposed to be pa; tsktah about u pala hydrogenerator.

In order to reduce the volume filled with a ventilating gas, the gas coolers are installed in the openings of the housing so that their covers 13 can be removed without disturbing the tightness of the internal space of the machine. Such installation of gas coolers provides, at the same time, the possibility of cleaning them during the operation of the hydrogenerator.

Flat stitches for the purpose of raising their mechanical strength can be reinforced with ribs acting as guides preventing the occurrence of circulating air streams in the space adjacent to them. rim.

Subject invention

Claims (4)

1. An electric machine with artificial cooling, distinguished by the fact that, in order to reduce ventilation losses by reducing the living area near the side surfaces of the rotor and reducing the ventilating effect of these surfaces and the rotor spokes, it is equipped with fixed flat shields located in non-linear proximity to the smooth side surfaces of the rotor and supplied on the reverse side of the ribs, preventing them from causing circulating flows of the cooling gas. 2. The electrical machine according to claim 1, is different in that, in order to reduce the heating of the gas in the narrow spaces between said shields and lateral over the rest of the rotor, it is provided with channels, supplying cooling gas to said intervals through the ventilation of the lateral surfaces rotor. 3. The electrical machine for PCs-1 and 2 is different, and with the fact that, in order to increase the ventilating effect of the rotor, the gasket, you have a gap between the rim packages and the poles of the rotor, made in the form of appropriately shaped centrifugal fan blades. 4.Electrical machine on PP. 1.2 and 3 distinguished by the fact that when used for cooling: the day of hydrogen or another gas} tightly the rotor shaft devices v are located on the indicated flat sheets.