Patent ID: 9297388
Filing Date: 2016-03-29
CPC Classification: F04C,F04D

Claim Text:
1. A shaft seal device comprising: a rotary shaft; a seal member arranged on an outer periphery of the rotary shaft; a liquid chamber filled with oil; and a seal member accommodation chamber that accommodates the seal member therein, wherein the liquid chamber and the seal member accommodation chamber are separated by a partition wall, wherein the rotary shaft passes through a shaft hole formed in the partition wall, wherein the seal member includes an annular piece which seals a gap between the outer periphery of the rotary shaft and the partition wall, wherein the annular piece has a recess, in the axial direction, at a part of a circumferential portion, wherein the partition wall includes a through-hole, a hollow member having a circumference smaller than a circumference of the rotary shaft is positioned in the through-hole while being spaced apart from the rotary shaft, and the hollow member includes a protruding portion that protrudes toward the seal member accommodation chamber and is engaged into the recess, and wherein the liquid chamber and the seal member accommodation chamber communicate with each other through the hollow member.