Rotary pump with electromagnetic LCR bearing
First Claim
Patent Images
1. A pump comprising:
- a housing having a fluid inlet and a fluid outlet;
a rotor disposed within the housing and rotatable about an axis to move fluid from the fluid inlet to the fluid outlet; and
a magnetic axial bearing for supporting the rotor, the axial bearing comprising an axial bearing target disposed on the rotor and an axial bearing stator disposed on the housing, the axial bearing stator including multiple stator poles, each of the stator poles including a first coil portion wound in a first direction and a second coil portion wound in a second direction opposite the first direction.
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Accused Products
Abstract
A pump (10) includes a housing (14) having a fluid inlet (26) and a fluid outlet (28). A rotor (12) is disposed within the housing (14) and rotatable about an axis (16) to move fluid from the fluid inlet (26) to the fluid outlet (28). A magnetic axial bearing (286) for supporting the rotor (12) includes an axial bearing target (70) disposed on the rotor and an axial bearing stator (130) disposed on the housing, the axial bearing stator including multiple stator poles (132a, 132b, 132c) each including a first coil portion wound in a first direction and a second coil portion wound in a second direction opposite the first direction.
73 Citations
54 Claims
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1. A pump comprising:
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a housing having a fluid inlet and a fluid outlet;
a rotor disposed within the housing and rotatable about an axis to move fluid from the fluid inlet to the fluid outlet; and
a magnetic axial bearing for supporting the rotor, the axial bearing comprising an axial bearing target disposed on the rotor and an axial bearing stator disposed on the housing, the axial bearing stator including multiple stator poles, each of the stator poles including a first coil portion wound in a first direction and a second coil portion wound in a second direction opposite the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20)
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12. A pump comprising:
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a housing having a fluid inlet and a fluid outlet;
a rotor disposed within the housing and rotatable about an axis to move fluid from the fluid inlet to the fluid outlet;
a magnetic first radial bearing for exerting a force on the rotor in a first direction along the axis; and
a magnetic second radial bearing for exerting a force on the rotor in a second direction along the axis opposite the first direction;
the first and second radial bearings being adjustable to allow for independently adjusting the net axial force exerted on the rotor by the radial bearings and the radial stiffness of the radial bearings. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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21. A pump comprising:
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a housing having a fluid inlet and a fluid outlet;
a rotor disposed within the housing and rotatable about an axis to move fluid from the inlet to the outlet, the rotor comprising permanent magnets arranged on a first side of the rotor and a magnetically conductive disk arranged on a second side of the rotor opposite the first side of the rotor;
a motor stator arranged on the housing to interact with the permanent magnets on the rotor;
at least one electromagnet arranged on the housing to interact with the magnetically conductive disk on the rotor; and
at least one ring magnet arranged on at least one of the first and second sides of the rotor;
at least one ring magnet arranged on the housing to magnetically interact with the at least one ring magnet on the rotor. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A pump comprising:
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a housing having a fluid inlet and a fluid outlet;
a rotor disposed within the housing and rotatable about an axis to move fluid from the inlet to the outlet;
a motor arranged to cause rotation of the rotor;
at least one electromagnet arranged to interact magnetically with material in the rotor, the electromagnet comprising a stator formed from a spiral wound lamination material.
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47. A pump comprising:
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a housing having a fluid inlet and a fluid outlet;
a rotor disposed within the housing and rotatable about an axis to move fluid from the inlet to the outlet;
a motor arranged to cause rotation of the rotor;
at least one electromagnet arranged to interact magnetically with material in the rotor, the electromagnet comprising an even number of poles, adjacent poles being wound in opposite directions. - View Dependent Claims (48)
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49. A pump comprising:
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a housing having a fluid inlet and a fluid outlet;
a rotor disposed within the housing and rotatable about an axis to move fluid from the inlet to the outlet;
a motor arranged to cause rotation of the rotor;
at least one electromagnet arranged to interact magnetically with material in the rotor, the material comprising a disk of spiral wound magnetic alloy material.
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50. A method for magnetically supporting a pump rotor in a housing for rotation about an axis, the method comprising the steps of:
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providing an axial bearing target on the rotor;
providing an axial bearing stator on the housing, the axial bearing stator including multiple stator poles each including a first coil portion and a second coil portion;
winding the first coil portion in a first direction; and
winding the second coil portion in a second direction opposite the first direction.
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51. A method for magnetically supporting a pump rotor in a housing for rotation about an axis, the method comprising the steps of:
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providing a magnetic first radial bearing for exerting a force on the rotor in a first direction along the axis;
providing a magnetic second radial bearing for exerting a force on the rotor in a second direction along the axis opposite the first direction; and
adjusting the axial positions of the first and second radial bearings to independently adjust the net axial force exerted on the rotor by the first and second radial bearings and the radial stiffness of the first and second radial bearings. - View Dependent Claims (52, 53, 54)
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Specification