Compressor end head heating arrangement

Patent metadata

Field	Value
Publication number	US-2017191487-A1
Application number	US-201715462192-A
Country	US
Kind code	A1
Filing date	Mar 17, 2017
Priority date	Nov 20, 2012
Publication date	Jul 6, 2017
Grant date	—

Abstract

A compressor end head for providing a thermal barrier to a mechanical seal includes an inner end head having an inner end head opening, inner end head grooves in the inner end head opening, configured to place and seal an end portion of a compressor shaft; and an outer end head having an outer end head opening configured to enclose the inner end head.

First claim

1 . A compressor end head for providing a thermal barrier to a mechanical seal, the compressor end head comprising:
an inner end head having:
an inner end head opening;
inner end head grooves in the inner end head opening, configured to place and
seal an end portion of a compressor shaft; and an outer end head having an outer end head opening configured to enclose the inner end head.

2 . The compressor end head of claim 1 , comprising an interference fit between the inner end head and the outer end head.

3 . The compressor end head of claim 1 , wherein the inner end head is welded to the outer end head.

4 . The compressor end head of claim 1 , wherein the mechanical seal comprises a dry gas seal (DGS).

5 . The compressor end head of claim 1 , wherein the inner end head comprises an inlet; and
the outer end head comprises an inlet chamber connected to the inlet, an outlet, an outlet chamber connected to the outlet, and straight axial channels connecting the inlet chamber and the outlet chamber.

6 . The compressor end head of claim 5 , wherein the inlet chamber and the outlet chamber comprise a radial thermal barrier around the mechanical seal.

7 . The compressor end head of claim 5 , wherein the straight axial channels comprise an axial thermal barrier around the mechanical seal.

8 . The compressor end head of claim 5 , comprising a flow path on an outer surface of the inner end head connected between the inlet and the outlet.

9 . The compressor end head of claim 8 , wherein the flow path comprises a flow path for hot oil or gas.

10 . A compressor, comprising:
a shaft; an inner end head having:
an inner end head opening ;
a plurality of inner end head grooves adjacent the inner end head opening
configured to place and seal an end portion of the shaft; and an outer end head having an outer end head opening configured to enclose the inner end head.

11 . The compressor of claim 10 , comprising a plurality of impellers connected to the shaft.

12 . The compressor of claim 10 , wherein the inner end head comprises an inlet; and
the outer end head comprises an inlet chamber connected to the inlet, an outlet, an outlet chamber connected to the outlet, and straight axial channels connecting the inlet chamber and the outlet chamber.

13 . The compressor of claim 12 , wherein the inlet chamber and the outlet chamber comprise a radial thermal barrier around the mechanical seal.

14 . The compressor of claim 12 , wherein the straight axial channels comprise an axial thermal barrier around the mechanical seal.

15 . The compressor of claim 12 , comprising a flow path on an outer surface of the inner end head connected between the inlet and the outlet.

16 . The compressor of claim 15 , wherein the flow path comprises a flow path for hot oil or gas.

Assignees

• Nuovo Pignone Tecnologie Srl

Inventors

• Sassanelli Giusepe
• Bigi Manuele
• Devenbu Suresh

Classifications

• F04D29/4206

  especially adapted for elastic fluid pumps · CPC title

• F04D29/102

  especially adapted for elastic fluid pumps · CPC title

• F04D29/624

  especially adapted for elastic fluid pumps · CPC title

• F04D17/122 Primary

  the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors · CPC title

• F04D29/124 Primary

  with special means for adducting cooling or sealing fluid · CPC title