| 摘要 |
PROBLEM TO BE SOLVED: To efficiently form up a recessed separation groove simple in constitution, and thereby provide an inexpensive dynamic pressure bearing device. SOLUTION: Let a negative pressure dissolving function be so constituted as to be sufficiently exhibited even if the recessed groove of a negative pressure dissolving part 15b is made shallow in depth, or wide in width, or the groove itself is eliminated by letting a device be so constituted as to allow the blow holes of porous material to be left as they are, over the surface consisting of the negative pressure dissolving part 56, and also allow lubricating fluid to be fed to a negative pressure generating area through the aforesaid blow holes of the negative pressure dissolving part 15b. This constitution thereby allows the necessity of the deep and narrow shape of the groove like those in the past, to be eliminated, and also enables the negative pressure dissolving part 15b to be formed up at low cost by another inexpensive means such as form molding and the like without processing parts such as machining high in cost and the like. |
