SEAL RING - NTN TOYO BEARING CO LTD

Title:

SEAL RING

Document Type and Number:

WIPO Patent Application WO/2019/181922

Kind Code:

A1

Abstract:

Provided is a seal ring with which wear of a counterpart housing can be reduced, sticking out from an annular groove can be prevented, and which has an excellent low-leakage property, which is the primary purpose of the seal ring. This seal ring 1 is a resin seal ring that is mounted in an annular groove 12 provided at the outer circumference of a substantially disc-shaped butterfly valve 11, and that is for sealing an annular gap 14 between the butterfly valve 11 and a housing 13 in which the valve is accommodated. A portion of the seal ring 1 protrudes from the annular groove 12 and adheres to the housing 13 due to pressure from the sealed fluid, thereby sealing the annular gap 14. The radial thickness t of the ring is 7–11% of the ring diameter in the free state, and when the valve is open and the diameter has expanded due to pressure from the sealed fluid the inner diameter of the ring is smaller than the outer diameter r of the valve.

Inventors:

KAKEHI KOHZOH (JP)
YAMAZOE YUUKI (JP)

Application Number:

PCT/JP2019/011404

Publication Date:

September 26, 2019

Filing Date:

March 19, 2019

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)

International Classes:

F16J15/3272; F16K1/226

Foreign References:

JP2017180726A	2017-10-05
JP2009085391A	2009-04-23
JPS4872548A	1973-09-29
JP2013241899A	2013-12-05

Other References: