SU1403248A1 - D.c. electric machine rotor - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to increase reliability by improving heat removal from the rotor core and reducing the contamination of the cooling ducts and the collector zone. The rotor of the electric machine contains a core 1 with a hollow multi-ribbed base, having cooling channels 7, blocked by plugs 10. Due to the fact that the plugs are bent and installed with a gap between the ribs of the base, this goal is achieved. 1 3. p. F-ly, 4 ill.

Description

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FIG. i

The invention relates to electrical engineering and can be used in traction generators of locomotives.

The purpose of the invention is to increase the reliability of the electric machine by improving the heat sink from the rotor core and reducing the contamination of the cooling paths and the rotor collector.

FIG. 1 shows the proposed rotor of an electric machine; in fig. 2 - the same, cross section; in fig. 3 - shaped cap; in fig. 4 is a section A-A in FIG. 3

: The rotor of an electric machine with constant current consists of a core 1 of the rotor, having: air radial channels 2 air cooling; the core is mounted on the base of the rotor 3 by means of prisms 4, the base contains sleeve 5 with welded axial hollow ribs 6. Together with the core; 1 the rotor base-3 forms cooling channels 7 connected to radial channels 2, as well as cooling channel 8 through which air is supplied to the collector 9 of the machine opposite end of the rotor. To create these separate air flows, the cooling channels 7 are closed by plugs 10, which are segments 11 welded between the fins 6. The shaped plugs 10 are curved on the side in the form of a visor 12 with an angle of attack "., Fitted with tides 13. The plugs are installed between the fins 6 the base of the rotor 3 with a gap 14. The arrow indicates the direction of rotation of the fiOTopa.

The device operates as follows.

: When the rotor 1 rotates, the cooling air is supplied to the axial channels 7 and 8 ft of the discharge fan. Through kayal 7, the air passes into the radial channels 2 and coaxes the core and windings of the rotor core. Through the drip 8 air rotor passes into the area of the collector. Separate flows are provided by plugs 10 installed between the ribs 6 of the rotor base 3, where part of the air passes through the gap 14 to the collector area. Between plugs 10 and the ribs 6 of the base. The visor 12 during rotation creates a disturbance of the air flow in the area of the winding and collector frontal parts, which improves their cooling. Additional gap 14 allows dust to pass through and out of the axial cavity, where a discharge zone in the area of gap 14 forms behind the visor 12, which facilitates dust removal with a reduced gap size 14, which reduces air consumption for these purposes. In addition, an acute angle of attack of 18-

45 °, on which the visor 12 is bent, ensures the trapping of air with dust escaping from the gaps 14 and emitting it in the radial direction, i.e. such a design of the visors 12 ensures the removal of dust,

including abrasive, electrically insulating, for example sand, conductive metal fractions (iron, cast iron sawdust from under the brakes and wheels) from the collector area, thereby ensuring its more reliable operation. The absence of dust accumulation in the stagnant region, in front of the plug 10, provides effective cooling of the rotor core and reduces the laboriousness of repair work.

25

Claims (2)

1. The rotor of an electric DC machine, containing a core with radial channels, placed on a hollow multi-ribbed base, forming cooling channels, the outer of which have access to the radial channels of the rotor core, installed in each of the external channels between the ribs of the segment plugs, excluding displacement flows in the collector zone, characterized in that, in order to increase reliability by improving heat removal from the rotor core and reducing the contamination of the cooling paths and the collector Noah zone, plugs are shaped, curved opposite to the flow into the intercostal space and installed with gaps between the ribs of the hollow base. 2. A rotor according to claim 1, characterized in that the plugs are provided with a visor on one side of the segment forming a blade in the end region of the rotor with an angle of attack of 25-45 °. / ten / J 2. PhaaZ Aa FIG. four