Dustproof seal structure
AssigneeMitutoyo Corporation
InventorsHisayoshi Sakai, Tsutomu Ugajin
Life of this patent
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Abstract
A dustproof seal structure includes a rotor assembly and a stator assembly rotatably supporting the rotor assembly. The stator assembly forms a horizontal thrust aerostatic bearing between a lower surface of the thrust plate and an upper surface of the stator assembly when compressed air is supplied between the lower surface of the thrust plate and the upper surface of the stator assembly. The thrust plate and the stator assembly form a sealing portion through which the compressed air flows. The sealing portion includes an inclined flow path whose height increases from an outer peripheral surface of the thrust plate toward the inside in a radial direction.
Claims16
A dustproof seal structure comprising:
- a rotor assembly having a disc-shaped thrust plate and a columnar rotor provided on a lower surface of the thrust plate;
- a stator assembly rotatably supporting the rotor assembly, wherein the stator assembly forms a horizontal thrust aerostatic bearing between the lower surface of the thrust plate and an upper surface of the stator assembly when compressed air is supplied between the lower surface of the thrust plate and the upper surface of the stator assembly, wherein
- the thrust plate and the stator assembly form a sealing portion through which compressed air flows, at a position radially outward from the thrust aerostatic bearing, and
- the sealing portion includes an inclined flow path that extends upwardly from an outer peripheral surface of the thrust plate toward an inside in a radial direction.
Dependencies are inferred from the claim text.