Rotor for a dynamo-electric machine

Abstract

The invention relates to a rotor (6) for a dynamo-electric machine (7) having: a rotor body (10) which rotates about a rotation axis (R) which runs in the direction of gravity (9), winding elements (14) which are arranged in slots (13) which run axially in the rotor body, two winding heads (9) which are arranged above and below the rotor body in the axial direction, wherein the winding elements emerge from the slots in the axial direction in the region of the winding heads and are connected to further winding elements, a winding head carrier (15) for each of the winding heads, which winding head carrier is arranged radially within the winding head and coaxially to the rotation axis, and which winding head carrier is fixed at least indirectly on the rotor body, or on a component which revolves with said rotor body, in a rotationally fixed manner and such that it can move in the direction of the rotation axis. The invention is characterized by the following features: spring elements (19) are provided in the region of the fixing means, said spring elements acting in the axial direction against the force of gravity (9) between the rotor body, and / or a component which revolves with said rotor body, and the winding head carrier (15), each of the winding head carriers (15) has at least one carrying ring (15.1,15.2) which is integral or is segmented in the circumferential direction, each of the carrying rings is mounted at least indirectly in relation to the rotor body (10) in the axial direction by means of spring elements (19).

Description

Technical field [0001] The invention relates to a rotor of the type defined in the preamble of claim 1 for electric motors, especially generators. Background technique [0002] In order to fix the winding end of the rotor winding, the winding end is usually supported internally by a ring-shaped winding end carrier and the winding end is fixed on the winding carrier with a band. In this regard, reference may be made to US 3,073,004A, for example. Especially in large machines, it is also possible to use a multi-part ring instead of a binding band, which uses an insulating gasket to abut on the winding end and uses a bolt to fix it on the winding carrier. In the event of particularly high centrifugal forces, a cover can also be inserted on the winding end. This type of cap in particular for fixing the winding end of the rotor of the turbine generator is used (book "LEITFADEN DER ELEKTROTECHNIK" - Chapter III - "motor structure and strength calculation" OF: DR.C.VON DOBBELER, 1962 ...

AI Technical Summary

Problems solved by technology

This can lead to excessively high stresses in the region of the winding parts, which can lead to corresponding compressions and / or deformations of the material of the winding parts

In addition, situations can arise that the winding components, which are typically designed to be embedded in the region of the slots, cannot sustain and fully bear the weight of the winding head carrier, so that after long-term operation, the entire winding can be displaced relative to the rotor body. sinking in the direction of gravity

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