| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a variable throttle type hydrostatic bearing in which a throttle ratio can be surely set to a predetermined throttle ratio corresponding to pressure of a pocket 2a by preventing a movable object 32 from tilting. <P>SOLUTION: A variable throttle 3 which throttles a flow rate of a fluid and causes the fluid to flow into a hydrostatic bearing pocket 2a is partitioned into a fluid supply chamber 3a and a fluid discharge chamber 3b by the movable object 32. An outflow port 31b communicating with the pocket 2a is provided in the center of an end face of the fluid discharge chamber 3b, a fluid storage groove 31c, a first discharge groove 31d and a second discharge groove 31e are disposed along the outer periphery of the outflow port 31b. Recesses 32a1, 32a2, 32a3 are provided in a part opposed to a part between the first discharge groove 31d and the second discharge groove 31e on the end face 32e of the movable object 32. A flow passage 32d communicating between the fluid supply chamber 3a and the fluid storage groove 31c and a flow passage 32c communicating the fluid supply chamber 3a and the recesses 32a1, 32a2, 32a3 and having a fixed throttle 32b are provided. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
