Elevator drive machine having rotating part positioned between two rotors along the axis of rotation
First Claim
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1. An elevator drive machine comprising:
- a drive machine frame;
a rotating part rotatably supported on said frame;
an electromechanical drive apparatus including a first electromagnetic drive element and a second electromagnetic drive element, each having a rotor and a stator, for driving rotation of said rotating part, said rotating part being positioned between the rotor of the first electromagnetic drive element and the rotor of the second electromagnetic drive element along an axis of rotation of said rotating part, such that forces along the axis of rotation created by the rotor and stator of the first electromagnetic drive element substantially offset any forces along the axis of rotation created by the rotor and stator of the second electromagnetic drive element;
a first bearing supporting radial force between said rotating part and said frame; and
a second bearing supporting axial force between said rotating part and said frame, such force supported by said second bearing having been substantially reduced by the offset of radial forces resulting from the physical arrangement of the first electromagnetic drive element and said second electromagnetic drive element.
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Abstract
An elevator drive machine includes a drive machine frame structure, a rotating part rotatably supported by bearings on the frame structure and having a traction sheave, and an electromechanical apparatus for driving the rotating part. The bearings of the rotating part include a bearing that substantially only transmits radial forces between the rotating part and the frame and a bearing that transmits axial forces between the rotating part and the frame.
10 Citations
16 Claims
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1. An elevator drive machine comprising:
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a drive machine frame;
a rotating part rotatably supported on said frame;
an electromechanical drive apparatus including a first electromagnetic drive element and a second electromagnetic drive element, each having a rotor and a stator, for driving rotation of said rotating part, said rotating part being positioned between the rotor of the first electromagnetic drive element and the rotor of the second electromagnetic drive element along an axis of rotation of said rotating part, such that forces along the axis of rotation created by the rotor and stator of the first electromagnetic drive element substantially offset any forces along the axis of rotation created by the rotor and stator of the second electromagnetic drive element;
a first bearing supporting radial force between said rotating part and said frame; and
a second bearing supporting axial force between said rotating part and said frame, such force supported by said second bearing having been substantially reduced by the offset of radial forces resulting from the physical arrangement of the first electromagnetic drive element and said second electromagnetic drive element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An elevator drive machine comprising:
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a drive machine frame;
a rotating part rotatably supported on said frame; and
an electromechanical drive apparatus including a first electromagnetic drive element and a second electromagnetic drive element, each having a rotor and a stator, for driving rotation of said rotating part, said rotating part being positioned between the rotor of the first electromagnetic drive element and the rotor of the second electromagnetic drive element along an axis of rotation of said rotating part, such that forces along the axis of rotation created by the rotor and stator of the first electromagnetic drive element substantially offset any forces along the axis of rotation created by the rotor and stator of the second electromagnetic drive element.
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Specification