US 11,905,838 B2Granted

Seal member and rotary machine

AssigneeMitsubishi Heavy Industries, Ltd.

InventorsTatsuro Furusho, Shin Nishimoto, Hidekazu Uehara, Kohei Ozaki, Azumi Yoshida

Life of this patent

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Abstract

A seal member is disposed between a rotor and a stator to provide a seal between the rotor and the stator. The seal member comprises: a rotary-side member fixed to a surface of the rotor opposing the stator; a fixed-side member fixed to the stator and facing the rotary-side member; and a first fin and a second fin which are disposed on one of the rotary-side member and the fixed-side member, the first fin protruding on the opposing surface side, the second fin being disposed on a lower pressure side in a rotating axis direction relative to the first fin and protruding on the opposing surface side. The thickness, in the rotating axis direction, of the second fin at the root thereof is greater than the thickness, in the rotating axis direction, of the first fin at the root thereof.

Claims9

Dependent claims

A seal member disposed between a rotor and a stator to seal a portion between the rotor and the stator, comprising:

a rotary-side member fixed to a facing surface of the rotor which faces the stator;
a fixed-side member fixed to the stator to face the rotary-side member;
a first fin provided in any one of the rotary-side member and the fixed-side member and protruding to a facing surface side;
and
a second fin disposed on a low-pressure side in a rotation axis direction from the first fin, and protruding to the facing surface side,
wherein a thickness of the second fin at a root in the rotation axis direction is thicker than a thickness of the first fin at a root in the rotation axis direction,
wherein the first fin is an attachment type fin separate from an installed member, and the second fin is a fixed type fin integrated with the installed member.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/628,636Filed 16 Jul 2020
Priority: JP 2019-13549823 Jul 2019
Published: US 2022/0259982 A118 Aug 2022
Granted: 20 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F01D 11/08
Preventing or minimising internal leakage of working-fluid, e.g. between stages: for sealing space between rotor blade tips and stator
F01D 11/02
Preventing or minimising internal leakage of working-fluid, e.g. between stages: by non-contact sealings, e.g. of labyrinth type
F02C 7/28
Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for…:…
F05D 2240/55
Components: seals

Family

US 2022/0259982 A1Pre-grant publication · published 18 Aug 2022
US 11,905,838 B2This patent

From the US filing history. Foreign family members aren’t listed.

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