Seal structure, rotary table device, and machine tool
AssigneeFanuc Corporation
InventorShingo TACHIKI
Life of this patent
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Abstract
A seal structure according to the present disclosure comprises: a labyrinth seal positioned in a gap between a housing and a rotary member extending into an inner space of the housing; an oil seal which is positioned inside a space sealed by the labyrinth seal and seals the inner space; a V-ring positioned between the labyrinth seal and the oil seal; and a first air supply part which has an air supply port positioned between the V-ring and the oil seal and sends air from the air supply port to the V-ring.
Claims15
A seal structure for sealing an internal space of a housing to which a rotating member is rotatably attached, the seal structure comprising:
- a labyrinth seal located in a gap between the rotating member and the housing, the gap communicating with the internal space;
- an oil seal that is located in a space sealed by the labyrinth seal in the gap, the oil seal being configured to seal the internal space;
- a V-ring that comprises a ring main body having an annular shape and a lip protruding from the ring main body, the V-ring being located between the labyrinth seal and the oil seal in the gap;
- and
- a first air supply portion having an air supply port located between the V-ring and the oil seal, the first air supply portion being configured to send air from the air supply port to the V-ring.
Dependencies are inferred from the claim text.