Electric machine with rotor cooling and corresponding cooling method
First Claim
Patent Images
1. A rotor device, comprising:
- a shaft defined by an axis;
a laminated core arrangement mounted on the shaft and having axial bores for conduction of a coolant, andtwo rotor pressure rings mounted on the shaft to secure the laminated core arrangement therebetween, wherein at least one of the two rotor pressure rings is configured for coolant to enter and exit through the axial bores, said rotor pressure ring having a bore assembly which is constructed so that coolant enters the rotor pressure ring in a radial direction on one side of the laminated core arrangement and which is in fluid communication with a first one of the axial bores to conduct coolant in one axial direction in parallel relationship to the shaft for subsequent exit of coolant in a radial direction on an opposite side of the laminated core arrangement, a coolant leadthrough configured to deflect coolant, entering in the radial direction on the opposite side of the laminated core arrangement into a second one of the axial bores to flow in another axial direction parallel to the shaft in opposition to the one axial direction, for exit of coolant in a radial direction on the one side of the laminated core arrangement, and a coolant routing wall which projects obliquely outward away from the bore assembly to conceal the bore assembly in an axial direction and to enhance a flow dynamics for the coolant with respect to the bore assembly.
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Abstract
The aim of the invention is to optimize cooling of a rotor using simple means. A rotor is provided, comprising rotor pressure rings (1) such that at least one of the two rotor pressure rings (1) is configured in order to enable targeted guiding of the coolant through the axial bores (3, 3′) in the rotor. In a special embodiment, the rotor pressure ring (1) can be formed in such a manner that it produces, in several bores (3′) in the rotor sheet stack (8), a flow of coolant in a first direction and in other bores (3), a flow of coolant in the other direction. An even, opposite flow cooling can be exclusively obtained by the contour of the rotor pressure ring (1).
22 Citations
16 Claims
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1. A rotor device, comprising:
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a shaft defined by an axis; a laminated core arrangement mounted on the shaft and having axial bores for conduction of a coolant, and two rotor pressure rings mounted on the shaft to secure the laminated core arrangement therebetween, wherein at least one of the two rotor pressure rings is configured for coolant to enter and exit through the axial bores, said rotor pressure ring having a bore assembly which is constructed so that coolant enters the rotor pressure ring in a radial direction on one side of the laminated core arrangement and which is in fluid communication with a first one of the axial bores to conduct coolant in one axial direction in parallel relationship to the shaft for subsequent exit of coolant in a radial direction on an opposite side of the laminated core arrangement, a coolant leadthrough configured to deflect coolant, entering in the radial direction on the opposite side of the laminated core arrangement into a second one of the axial bores to flow in another axial direction parallel to the shaft in opposition to the one axial direction, for exit of coolant in a radial direction on the one side of the laminated core arrangement, and a coolant routing wall which projects obliquely outward away from the bore assembly to conceal the bore assembly in an axial direction and to enhance a flow dynamics for the coolant with respect to the bore assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A rotor device, comprising:
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a shaft defined by an axis; a laminated core arrangement mounted on the shaft and having a plurality of axial bores for conduction of a coolant, and two rotor pressure rings mounted offset to one another on the shaft at opposite ends of the laminated core arrangement for axial securement of the laminated core arrangement, wherein one of the two rotor pressure rings is configured for routing the coolant through a first one of the axial bores, and the other one of the rotor pressure rings is configured for routing the coolant through a second one of the axial bores, each said rotor pressure ring having a bore assembly which is constructed so that coolant enters the rotor pressure ring in a radial direction on one side of the laminated core arrangement and which is in fluid communication with one of the first and second axial bores to conduct coolant in one axial direction in parallel relationship to the shaft for subsequent exit of coolant in a radial direction on an opposite side of the laminated core arrangement via the other one of the rotor pressure rings, a coolant leadthrough configured to deflect coolant, entering in the radial direction on the opposite side of the laminated core arrangement via the other one of the rotor pressure rings into the other one of the first and second axial bores to flow in another axial direction parallel to the shaft in opposition to the one axial direction for exit of coolant in a radial direction on the one side of the laminated core arrangement via the one rotor pressure ring, and a coolant routing wall which projects obliquely outward away from the bore assembly to conceal the bore assembly in an axial direction and to enhance a flow dynamics for the coolant with respect to the bore assembly.
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Specification