Centrifugal compressor

Patent metadata

Field	Value
Publication number	US-2018347589-A1
Application number	US-201515761678-A
Country	US
Kind code	A1
Filing date	Nov 13, 2015
Priority date	Nov 13, 2015
Publication date	Dec 6, 2018
Grant date	—

Abstract

A centrifugal compressor includes a rotor including: a shaft that extends along an axis and an impeller that is fixed to an outer surface of the shaft and feeds a fluid that flows into a first side in an axial direction to an outer side in a radial direction of the axis under pressure; a diaphragm that surrounds the impeller from an outer circumference side; a first casing head disposed at a second side of the diaphragm in the axial direction at an interval; a seal device disposed between the first casing head and the shaft; and a bearing device disposed at the second side in the axial direction with respect to the seal device and disposed between the first casing head and the shaft.

First claim

1 . A centrifugal compressor comprising:
a rotor comprising a shaft that extends along an axis and an impeller that is fixed to an outer surface of the shaft and feeds a fluid that flows into a first side in an axial direction to an outer side in a radial direction of the axis under pressure; a diaphragm that surrounds the impeller from an outer circumference side; a first casing head disposed at a second side of the diaphragm in the axial direction at an interval; a seal device disposed between the first casing head and the shaft; a bearing device disposed at the second side in the axial direction with respect to the seal device and disposed between the first casing head and the shaft; and a shield part fixed to a first side of the first casing head in the axial direction, that defines a suction flow passage for introducing fluid into the impeller along with the diaphragm and to define an insulating space between the shield part and the first casing head.

2 . The centrifugal compressor according to claim 1 , wherein the shield part is fixed to only an end of the first casing head at the outer side in the radial direction, and a clearance is provided between an end of the shield part at an inner side in the radial direction and an outer circumferential surface of the shaft.

3 . The centrifugal compressor according to claim 1 , further comprising:
a temperature regulator comprising:
a pipe line formed inside the first casing head;
a temperature regulator main body connected to the pipe line; and
a heat medium introduced into the temperature regulator main body via the pipe line.

4 . The centrifugal compressor according to claim 1 , further comprising:
a second casing head disposed at a first side of the diaphragm in the axial direction at an interval; a discharge side bearing device disposed between the second casing head and the shaft; and a second shield part fixed to a second side of the second casing head in the axial direction and defines a discharge flow passage discharging the fluid from the impeller along with the diaphragm and to define a discharge side insulating space between the second shield part and the second casing head.

5 . The centrifugal compressor according to claim 1 , further comprising an insulator filled in the insulating space.

6 . The centrifugal compressor according to claim 1 , wherein:
the shield part comprising a shield member in which an end thereof at an outer side in the radial direction and an end thereof at an inner side in the radial direction are fixed to a first side of the first casing head in the axial direction; and the insulating space is sealed by the shield member.

7 . The centrifugal compressor according to claim 6 , further comprising a seal device provided for at least one of a plurality of fixing parts of the shield member and the first casing head.

Assignees

• Mitsubishi Heavy Ind Ltd
• Mitsubishi Heavy Ind Compressor Corp

Inventors

• Yanagisawa Eiichi
• Yokoo Kazutoshi
• Okada Noriyuki
• Masuda Yuji
• Tokuyama Shinichiro

Classifications

• F04D29/4213

  suction ports · CPC title

• F04D29/2294

  for protection, e.g. against abrasion · CPC title

• F04D29/5853 Primary

  heat insulation or conduction · CPC title

• F04D17/125

  the casing being vertically split · CPC title

• F04D29/102

  especially adapted for elastic fluid pumps · CPC title