摘要:
{Problem} To provide sliding parts that do not leak when stopped, operate under fluid lubrication and prevent leakage when rotating, including during initial rotation, and are capable of striking a balance between seal tightness and lubrication. {Solution} A plurality of pumping areas for generating pumping action via the relative rotational sliding of a stationary ring and a rotating ring is discontinuously formed in a circumferential direction on a sealing face of one of the stationary ring and rotating ring so as to communicate with a sealed fluid-containing space; the pumping areas being provided with intake pumping areas operating in a direction in which the sealed fluid is drawn in and outflow pumping areas operating in a direction in which the sealed fluid is expelled; and a plurality of dynamic pressure-generating grooves for generating dynamic pressure via the relative rotational sliding of the stationary ring and the rotating ring being formed in a circumferential direction on a sealing face of the other of the stationary ring and the rotating ring so as to communicate with the sealed fluid-containing space.
摘要:
{Technical Problem} An object of the present invention is to reduce the amount of leaking of a sealed fluid and to match together the center of a floating ring and the center of a rotating shaft. {Solution to Problem} A sealing device provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing is characterized in that a plurality of inversely directed dynamic pressure generation grooves for creating an action whereby a sealed fluid attempting to leak out is pushed back are provided in the circumferential direction to the inner peripheral surface of the floating ring.
摘要:
A sealing device and a sealing structure in which sliding ability is stabilized are provided. A lip tip of a first seal lip (120) includes a first tapered surface (123a) which expands in diameter toward a sealed fluid side (L) and a second tapered surface (123b) which expands in diameter toward an opposite side (A) of the sealed fluid side, the second tapered surface (123b) is provided with a plurality of screw thread protrusions (or screw thread grooves) (124) which move grease (170) in the axial direction while rotating relative to a rotary shaft (21), and each of the plurality of screw thread protrusions (or screw thread grooves) (124) is disposed so as to move the grease (170) toward the opposite side (A) of the sealed fluid side.
摘要:
A capacity control valve where a valve section is caused to be in contact with and separated from a valve seat by a valve rod to control the flow rate of pressurized fluid. The capacity control valve includes a first valve rod having a valve section and having a first peripheral surface formed on its outer periphery, a first valve chamber having a valve seat that comes into contact with and is separated from the valve section and having a first path into which pressurized fluid flows, and a valve housing having a through-hole that is movably fitted on the first peripheral surface of the first valve rod. The through-hole of the valve housing has a first tapered surface diverging as it goes away in the axial direction from the first valve chamber.