SEALING DEVICE - EAGLE IND CO LTD

Title:

SEALING DEVICE

Document Type and Number:

WIPO Patent Application WO/2018/025629

Kind Code:

A1

Abstract:

According to the present invention both shear leakage of oil and pressure leakage due to a centrifugal force of oil concomitant with rotation of a member that performs a whirling motion are reduced by means of a surface texture applied to a sliding surface of an oil seal member. The present invention is characterized in that: an oil seal member 15 is provided on an outside surface of a member 5 that performs a whirling motion, such as a rotor of a rotary engine; a step 15c is provided in a circumferential direction in a part of a sliding surface 15b that slides relative to a stationary-side member 3 of the oil seal member 15; a relatively high surface is formed on one side, in the radial direction, of the step 15c, and a relatively low surface is formed on the other side, in the radial direction, of the step 15c; and a pumping groove 20 by means of which oil that is about to leak from the high-surface side to the low-surface side is pumped to the high-surface side as a result of sliding of the high surface relative to the stationary-side member 3 is provided in the high surface.

More Like This:

WO/2010/047961

ROTARY ENGINE WITH DISTRIBUTED FUEL INJECTION

Inventors:

TOKUNAGA UUICHRO (JP)
ITADANI MASATOSHI (JP)
YOSHINO AKIRA (JP)

Application Number:

PCT/JP2017/026005

Publication Date:

February 08, 2018

Filing Date:

July 19, 2017

Export Citation:

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Assignee:

EAGLE IND CO LTD (JP)

International Classes:

F02B55/02; F01C19/12; F02B53/00; F16J15/34

Domestic Patent References:

WO2014024742A1

2014-02-13

Foreign References:

JPS6141921Y2	1986-11-28
JPS5236566B2	1977-09-16
JP2005337503A	2005-12-08
JPS6182177U	1986-05-31
JPS5246961Y2	1977-10-25
JP2013072425A	2013-04-22
JPH0666374A	1994-03-08
US3969049A	1976-07-13
JPS5072008A	1975-06-14
JP2013072425A	2013-04-22

Other References: