rotor for electric motor
A technology of electric motors and rotors, which is applied in the direction of electric components, engine components, machines/engines, etc., and can solve the problems that winding components cannot continuously and completely bear the weight of the winding end, high stress, sinking, etc.
Active Publication Date: 2017-03-29
VOITH PATENT GMBH
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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
Method used
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[0023] exist figure 1A hydroelectric power station 1 is schematically shown in . The heart of the hydroelectric power plant 1 is the supply system 2 , which conducts water from an upstream area (not shown here) to a water turbine 3 and conveys it via diffusers 4 shown schematically to a downstream area, also not shown here. middle. The water turbine 3 is here connected via a shaft 5 to a rotor 6 of a doubly-fed asynchronous machine 7 with a slip ring rotor. The rotor 6 is driven by the water turbine 3 and rotates in the schematically shown stator 8 about an axis of rotation R which, as in this type of hydropower plant 1 , generally points in the direction of gravity g. The rotor 6 and the stator 8 together form an asynchronous machine with variable rotational speed as a generator. The asynchronous motor 7 is used to generate electrical energy from water energy. It is also conceivable to use a pump turbine instead of the water turbine 7 , similar to the water turbine 3 , in...
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The invention relates to a rotor for a dynamo-electric machine having: a rotor body which rotates about a rotation axis which runs in the direction of gravity, winding elements which are arranged in slots which run axially in the rotor body, two winding heads 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 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 are provided in the region of the fixing means, said spring elements acting in the axial direction against the force of gravity between the rotor body, and / or a component which revolves with said rotor body, and the winding head carrier, each of the winding head carriers has at least one carrying ring 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 in the axial direction by means of spring elements.
Description
technical field [0001] The invention relates to a rotor of the type defined in the preamble of claim 1 for an electric motor, in particular a generator. Background technique [0002] In order to fasten the winding ends of the rotor windings, the winding ends are usually internally supported by an annular winding end carrier and the winding ends are fastened to the winding carrier by means of straps. In this regard reference may be made, for example, to US 3,073,004A. Especially in the case of large machines, instead of the ties, it is also possible to use multi-part rings which bear against the winding ends with insulating washers and are fastened to the winding carrier with screws. In the event of particularly high centrifugal forces, a cover can also be inserted over the winding ends. This type of shroud is commonly used especially for the winding ends of the rotors of stationary turbogenerators (Book "LEITFADEN DERELEKTROTECHNIK" - Chapter 3 - "Structure and Strength Ca...
Claims
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IPC IPC(8): H02K3/51
CPCH02K3/51Y02E10/20F03B13/08H02K3/48H02K3/505H02K7/1823
Inventor 菲利普·艾勒布雷希特禅洲·白木霍尔格·亨宁
Owner VOITH PATENT GMBH