Sealing mechanism and turbo refrigerator

Patent metadata

Field	Value
Publication number	US-10132325-B2
Application number	US-201414895608-A
Country	US
Kind code	B2
Filing date	May 30, 2014
Priority date	Jun 4, 2013
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A sealing mechanism ( 40 ) includes: a ring-shaped sealing body ( 41 ) which surrounds a rotating shaft ( 24 ) when viewed from an axial direction; a sealing-body support part ( 42 ) which supports the sealing body ( 41 ) so as to be movable in a radial direction of the rotating shaft ( 24 ); and an elastic member ( 44 ) which is interposed between the sealing body ( 41 ) and the sealing-body support part ( 42 ).

First claim

The invention claimed is:

1. A sealing mechanism comprising:
a sealing-body support part which is fastened to a housing of a turbo compressor and surrounds a rotating shaft in the housing;
a sealing body which is provided between the sealing-body support part and the rotating shaft, thereby surrounding the rotating shaft; and
an elastic member which is sandwiched between the sealing body and the sealing-body support part and surrounds the sealing body, wherein
the sealing-body support part is composed of a ring-shaped base portion which is brought into contact with the housing, and a ring-shaped cover portion;
the base portion and the cover portion sandwich the sealing body;
the contact surface between the base portion and the sealing body is a sliding surface;
the contact surface between the cover portion and the sealing body is a sliding surface; and
the sealing body is able to move in a radial direction of the rotating shaft.

2. The sealing mechanism according to claim 1 , wherein a labyrinth groove is provided in a portion facing the rotating shaft, of the sealing body.

3. The sealing mechanism according to claim 1 , wherein the elastic member is an O-ring which surrounds the entire circumference of the sealing body when viewed from an axial direction of the rotating shaft.

4. A turbo refrigerator comprising:
a turbo compressor which has a rotating shaft connecting an impeller and a motor and performs compression of a refrigerant;
a condenser which condenses the refrigerant compressed in the turbo compressor;
an evaporator which evaporates the condensed refrigerant; and
a sealing mechanism which performs sealing of a periphery of the rotating shaft of the turbo compressor, wherein
the sealing mechanism is the sealing mechanism according to claim 1 .

Assignees

• Daikin Ind Ltd

Inventors

• Oda Kentarou
• Sakuma Nobuyoshi

Classifications

• F25B2400/13

  Economisers · CPC title

• F16J15/447

  Labyrinth packings · CPC title

• F25B1/10

  with multi-stage compression (with cascade operation F25B7/00) · CPC title

• F25B2500/22

  Preventing, detecting or repairing leaks of refrigeration fluids · CPC title

• F04D29/102

  especially adapted for elastic fluid pumps · CPC title