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Electrical rotating machine with one-sided cooling and method for one-sided cooling

A technology for rotating electrical machines and cooling air, applied in cooling/ventilation devices, electrical components, electromechanical devices, etc., can solve problems such as long structure length, and achieve the effect of saving cost and reducing complexity

Inactive Publication Date: 2017-08-01
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires a longer structure length

Method used

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  • Electrical rotating machine with one-sided cooling and method for one-sided cooling
  • Electrical rotating machine with one-sided cooling and method for one-sided cooling
  • Electrical rotating machine with one-sided cooling and method for one-sided cooling

Examples

Experimental program
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Embodiment Construction

[0025] figure 1 A longitudinal sectional view of a first embodiment of a rotating electrical machine is shown, which is rotationally symmetrical in the axial direction, wherein only the upper part of the machine is shown. Such machines, especially motors, have a power of more than 10 megawatts and a diameter of more than 5 meters. The rotating electrical machine has a stator 1 with a stator lamination stack 2 , a front stator winding head 5 a and a rear stator winding head 5 b. Furthermore, the rotating electrical machine has a rotor 8 with a front rotor winding head 6 a and a rear rotor winding head 6 b and a shaft 10 . The hydrodynamic machine 7 produces a cooling air flow 12 , 13 , 14 , in particular under pressure, by means of which the machine is cooled on one side. The front rotor winding head 6 a and the front stator winding head 5 a are directly cooled by means of a third cooling air flow 12 , while a first cooling air flow 13 passes from the pressure side of the hyd...

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PUM

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Abstract

The invention relates to an electrical rotating machine, comprising a stator (1), a rotor (8) and a turbomachine (7), which is provided to cool the electrical rotating machine on the one side, wherein the stator (1) comprises a laminated stator core (2), a front stator winding head (5a) and a rear stator winding head (5b), wherein the rotor (8) comprises a rear rotor winding head (6b). In order to improve cooling during the one-sided ventilation, in particular with respect to the prior art, with regard to a uniform temperature distribution, it is suggested that the laminated stator core (2) comprise channels (9a, 9b) extending in the axial direction, which are provided to cool the rear stator winding head (5b) with a second cooling air flow (14) generated by the turbomachine (7), wherein at least one first channel (9a) is provided to guide a second cooling air flow (14) generated by the turbomachine (7) through the laminated stator core (2) to the rear stator winding head (5b), wherein an air guide (4), which is fastened to the laminated stator core (2) on the side of the rear stator winding head (5b), is provided to bypass the second cooling air flow (14) via the rear stator winding head (5b), wherein at least one second channel (9b) is provided to guide the second cooling air flow (14) back from the rear stator winding head (5b) through the laminated stator core (2), wherein at least two radial slits (11) arranged in the axial direction, which are arranged radially between the channels (9a, 9b) running in the axial direction and an air gap (3) between the laminated stator core (2) and the rotor (8) and are connected to each other, are provided to cool the laminated stator core (2), in particular the stator windings, and / or the rear rotor winding head (6b), wherein the axial distance between the radial slits (11) to the side of laminated stator core (2) which faces away from the turbomachine (7) is reduced and is provided to compensate for a temperature gradient caused by one-sided cooling.

Description

technical field [0001] The invention relates to a rotating electrical machine with a stator, a rotor and a hydrodynamic machine, which is provided for cooling the rotating electrical machine on one side, wherein the stator has a stator lamination stack, a front stator winding head and a rear stator winding head, In this case the rotor has a rear rotor winding head. Background technique [0002] The invention relates to the field of large electrical machines. For cooling purposes, such large machines, such as in particular ring motors for gearless cement tube mills or for reducing copper ore, must be ventilated from the outside due to the low rotational speed of the motors. For this purpose, the cooling air is either drawn from the environment via a filter or recooled in the circuit via an air-to-water cooler. In this case, the cooling air flow must be forced against the motor via different channels by means of one or more hydrodynamic machines with fans, which are driven s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/20H02K9/04H02K9/10
CPCH02K1/20H02K9/04H02K9/10H02K2209/00
Inventor 弗兰克·赛比克
Owner SIEMENS AG
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