SEALING DEVICE AND ROTATING MACHINE

• US 20180355880A1
• Filed: 01/18/2016
• Published: 12/13/2018
• Est. Priority Date: 01/18/2016
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Compressor Corporation (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Compressor Corporation (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Urushidani, Hiroki
• Granted Patent: US 10,641,278 B2
• Time in Patent Office: Days
• CPC Class Codes: F04D 17/122 the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
• CPC Class Codes: F04D 29/056 Bearings
• CPC Class Codes: F04D 29/06 Lubrication F04D13/0606, F04D13/0646, F04D13/0653 take precedence
• CPC Class Codes: F04D 29/102 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/12 using sealing-rings
• CPC Class Codes: F16B 33/004 Sealing; Insulation by means of washers F16B43/001
• CPC Class Codes: F16J 15/3464 Mounting of the seal
• CPC Class Codes: F16J 15/447 Labyrinth packings

Abstract

A sealing device includes: a sealing body that seals a gap between a rotor and the sealing body; a fastening bolt that fixes the sealing body to a stator; and a bolt sealing part that seals a gap around the fastening bolt. The sealing body includes: a facing surface that faces a fixing surface of the stator facing in an axial direction; and a body through-hole that penetrates the sealing body and opens on the facing surface. The bolt sealing part is disposed in a gap between a head portion and the inner peripheral surface of the body through-hole, or between the fixing surface and the facing surface.

Claims

1. A sealing device disposed between a rotor extending along an axis as a center and a stator disposed on an outer peripheral side of the rotor, the sealing device comprising:

a sealing body that seals a gap between the rotor and the sealing body;

a fastening bolt that fixes the sealing body to the stator; and

a bolt sealing part that covers a central axis of the fastening bolt and seals a gap around the fastening bolt,

wherein the sealing body comprises;

a facing surface facing a fixing surface of the stator in a direction along the axis; and

a body through-hole in the sealing body that opens on the facing surface,

wherein a head portion of the fastening bolt is inserted into the body through-hole and a tip portion of the fastening bolt is fixed to a fixing hole on the fixing surface, and

wherein the bolt sealing part is disposed in at least one of a gap between the head portion and an inner peripheral surface of the body through-hole and a gap between the fixing surface and the facing surface.

2. The sealing device according to claim 1, wherein the bolt sealing part is an O-ring fixed to the head portion.

3. The sealing device according to claim 1, further comprising a ring member, the ring member comprising:

a first ring-facing surface facing the facing surface;

a second ring-facing surface facing the fixing surface; and

a ring through-hole,

wherein the fastening bolt is inserted in the ring through-hole and penetrates toward the second ring-facing surface from the first ring-facing surface,

wherein the bolt sealing part is disposed between the facing surface and the first ring-facing surface, and between the fixing surface and the second ring-facing surface.

4. A rotating machine comprising:

a stator;

a rotor that rotates in the stator; and

the sealing device according to claim 1.