Hybrid orbital fluid dynamic bearing motor
AssigneeSeagate Technology LLC
InventorsAnthony Aiello, Hans Leuthold, Klaus Kloeppel, Paco Flores, Alan Grantz
Life of this patent
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Abstract
Hybrid orbital fluid dynamic bearing motors are disclosed. The motors achieve improved efficiency advantages observed in fluid dynamic bearing motors containing an orbital ring. In addition, the hybrid orbital FDB motor has serial thrust bearings and traditional style journal bearings, which provide typically higher radial and angular stiffness not observed in previous orbital fluid dynamic bearing motor designs. Designs for centering orbital rings are also disclosed.
Claims21
A hybrid orbital fluid dynamic bearing motor assembly, the assembly comprising:
- an inner member;
- an outer member configured to rotate about a rotational axis at a first angular velocity;
- and
- an orbital ring disposed between the inner member and the outer member, the orbital ring configured to rotate about the rotational axis at a second angular velocity, the second angular velocity being less than the first angular velocity;
- a first fluid dynamic thrust bearing disposed between the orbital ring and the inner member;
- a second fluid dynamic thrust bearing disposed between the orbital ring and the second member;
- and
- at least one fluid dynamic journal bearing disposed between the inner member and the outer member, wherein the thrust bearings act in parallel with the journal bearing.
A hybrid orbital fluid dynamic bearing motor assembly, the assembly comprising:
- an inner member;
- an outer member configured to rotate about a rotational axis at a first angular velocity;
- and
- an orbital ring disposed between the inner member and the outer member, the orbital ring configured to rotate about the rotational axis at a second angular velocity, the second angular velocity being less than the first angular velocity;
- a first set of bearing surfaces of the inner member and orbital ring and the outer member and orbital ring having a conical shape relative to the central axis of the assembly;
- and
- a journal bearing disposed between the inner member and the outer member.
An orbital fluid dynamic bearing motor assembly, the assembly comprising:
- an inner member;
- an outer member configured to rotate about a rotational axis at a first angular velocity;
- and
- an orbital ring disposed between the inner member and the outer member, the orbital ring configured to rotate about the rotational axis at a second angular velocity, the second angular velocity being less than the first angular velocity;
- the orbital ring configured in conjunction with the inner member and outer member to realign around the rotational axis of the assembly.
Dependencies are inferred from the claim text.