| 摘要 |
Rotary seal apparatus for permitting the transfer of fluid under pressure from a stationary housing port to a passage in a spindle rotatably mounted by the housing and then to, for example, a chuck mounted by the spindle, that includes sealing subassemblies on axial opposite sides of the port in fluid sealing relationship with the housing interior, which in conjunction with the spindle and housing provide a seal chamber and form an annular clearance space with the spindle to permit leakage fluid flow from said chamber, and a pair of annular seals mounted in said chamber and on the spindle for limited free axial and radial movement relative one another, the stationary housing and the spindle. The seals each have an internal tapered surface which gives a self centering action when fluid under pressure flows between them and the spindle to eliminate concentricity problems and are axially spaced to form face seals with the adjacent subassembly. The minimum annular clearance between the seals and spindle is less than that between the spindle and subassemblies to limit leakage flow to the clearance spaces between the housing and subassemblies. |
