SU446933A1 - Electric machine - Google Patents

Description

The image refers to cloud computing for the cooling section of the electrical system.

A known electric machine with a 1-tubular air-cooler, containing pofop with radial and axial channels, two fans are located symmetrically on the shaft, and a stator with radial ventilation channels; Between the stator back and the air cooler housing there are fixed ribs.

Increased operational reliability is ensured by the fact that a cylindrical partition is inserted between the air cooler casing and the stator back, which is attached to the longitudinal ribs.

At the same time, an additional tubular air cooler is introduced by the partition and stator back.

Fig. X presents the proposed machine, a longitudinal section;

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in the space between the cylinder cover I of the cooler 2 and the back of the stator 3, partitions 5 are attached to the longitudinal edges 4, which in the specified spacing are two separate circular sections consisting of a number of antialine channels 6 and 7.

The axial channels 6 of the upper circular section communicate with the chambers 8 of the frontal connections 9 of the stator winding and the inter-tube space 10 of the air cooler through the slot I in the cylindrical housing I, and the axial channels 7 of the lower circular section communicate with the radial 12 and 13 extreme channels of the sttojpa and chambers 8 Lobovk connected 9 stator windings.

The pressure elements 14 are symmetrically located on the shaft 15 of the rotor 16 "

The sections of the axial channels 6 1 7 of the upper and lower circular sections of the air cooler 2 are selected optimally, based on the condition of the smallest cooling loss and the ratio of the cooling air flow rates through the radial channels of the stator core and frontal winding connections.

The internal air, the exit from the frontal connections 9 of the stator winding, splits into two parts: a part of it enters the pressure elements 14, and the other part enters the axial channels 17, then into the radial channels 18 of the rotor 16

When leaving the pressure elements 14, air enters the intertube space of the air-cooler and after cooling through slot II in the casing I enters the axial channels 6 of the upper circular section of the air-cooler, from where it goes into the chambers 8 of the frontal stator windings.

From the radial channels of the rotor 16 through the gap of the pump, the air pushes into the channels 12 of the stator, from where it enters the axial channels 7 of the lower circular section of the air cooler

At the exit of the channels of this section, a part of the air branches to the extreme channels 13 of the stator and then both air flows in parallel jets exit into the chambers 8 of the frontal connections of the stator cores, where they are mixed with the cooled air from the axial channels 6 of the upper circular section of the air cooler and then jet frontal connections of the stator winding

In another embodiment of the machine, between the partition 5 and the back of the stator, an additional tubular air cooler 19 is inserted. In space 8 divided by ribs into a number of compartments, the tube of the first circular section - air cooler 19 is placed, and the tubes of the second circular section - air cooler H are placed in the space between the cylinders of the body 20 machines and casing I, The number of tubes in both sections of the air coolers and the cross section of compartments 21 arranged by them are chosen optimally, based on the condition of the least 1x cooling losses the ratio and the ratio of cooling air flow through the radial channels 12 of the stator core and the joint joints 9

Coolant air from the external ventilation cycle is passed through the coolers.

The flat annular partitions 22 are made with through holes through which the tubes of the first circular section of the air cooler are passed.

The internal air after exiting the frontal connections 9 of the winding splits into two parts: part of it enters the pressure elements 14, and the other part axial channels 17, then into the radial channels 18 of the rotor. Upon leaving the pressure elements 14, air enters the space between the tubes of the upper circular section of the air coolers and after cooling through the gasket; 11i II in the cylindrical housing enters the air cooler compartments 21, from where the stator windings 9 enter the chambers.

From the radial channels 18 of the rotor, through the gap of the machine, AIR is fed into the radial channels 12 of the stator, from where it enters the space between the tubes of the lower circular section of the air cooler, where it is cooled.

At the exit from this section, a part of the air branches into the outer channels 13 of the stator, and then both parts of the air flow in parallel jets exit into the chambers of the frontal connections of the stator winding, where they are mixed with the flow of cold air that enters sequentially through the slot II and further through the compartments 21 frontal connections of the stator winding are washed from the second circular section of the air cooler, then with a common jet of cold air. From the frontal connections of this winding, air flows back into the pressure elements 14 and the axial channels 17 of the rotor

Thus, the air path of the ventilation of the inner loop is closed.

SUBJECT OF INVENTION

Claims (2)

I. An electric machine with a tubular air cooler containing a rotor with radial and axial channels, on the shaft of which two fans are symmetrically located; a stator with radial ventilation channels; The stator back and air cooler casing secured longitudinal ribs, characterized in that, in order to increase operational reliability, a cylindrical partition was inserted, which is attached to said longitudinal ribs. 2. Iashiyya according to Clause I., of the first and the same, that an additional tubular air cooler is inserted between the motherboard and the back of the stator. FI.1 /. . j .. / / / X / // xG7u 7y / / / / T / / U / / j U 7 / // X / X / X ////////// /. 74/3 11 21 FIG. five