SEALING DEVICE

摘要

A sealing device includes a pumping ring capable of increasing the flow amount of the fluid to be self-circulated, and thereby increasing the head. The pumping ring (160) includes: a through hole (161) that is provided so as to pass through the pumping ring (160) from an inner peripheral surface to an outer peripheral surface and serves as a passage of the fluid; and an inlet groove (162) that is provided on the inner peripheral surface so as to run from a side face on a side where the mechanical seal (M) is disposed to the through hole (161), and leads the fluid into the through hole (161), and on an outer peripheral surface of the sleeve (110), an auxiliary inlet groove (111) that leads the fluid into the through hole (161) is provided at a position opposing the inlet groove (162) and the through hole (161).

主权项

1. A sealing device comprising:
a mechanical seal having a rotary ring that is provided on a rotary shaft side and a stationary ring that is provided on a housing side and slides relative to the rotary ring, the housing having a shaft hole into which a rotary shaft is inserted; a sleeve that is provided on an outer peripheral side of the rotary shaft and on which the rotary ring is mounted; and a pumping ring that is mounted on an outer periphery of the sleeve, rotates together with rotation of the rotary shaft and the sleeve, and self-circulates a fluid, wherein the pumping ring includes: a through hole that is provided so as to pass through the pumping ring from an inner peripheral surface to an outer peripheral surface and serves as a passage of the fluid; and an inlet groove that is provided on the inner peripheral surface so as to run from a side face on a side where the mechanical seal is disposed to the through hole, and leads the fluid into the through hole, and on an outer peripheral surface of the sleeve, an auxiliary inlet groove that leads the fluid into the through hole is provided at a position opposing the inlet groove and the through hole.