Coating to suppress adhesion of deposits, and flow path component including coating

Patent metadata

Field	Value
Publication number	US-2017089262-A1
Application number	US-201615377422-A
Country	US
Kind code	A1
Filing date	Dec 13, 2016
Priority date	Jun 25, 2014
Publication date	Mar 30, 2017
Grant date	—

Abstract

A lubricating oil line of a gas turbine or a turbocharger includes a flow path component which allows passage of a lubricating oil. The flow path component used in the gas turbine includes a sump chamber and a vent line. A surface of the flow path component, which is exposed to a temperature approximately from 300 to 450° C. and comes into contact with the lubricating oil, is covered with a coating that includes nickel or a nickel-phosphorus alloy, and particles made of polytetrafluoroethylene.

First claim

What is claimed is:

1 . A coating to cover a surface of a device, the device being exposed to and coming into contact with a lubricating oil in a range approximately from 300 to 450° C., comprising:
any of nickel and a nickel-phosphorus alloy; and
particles made of polytetrafluoroethylene.

2 . The coating according to claim 1 , wherein the coating includes:
the particles made of polytetrafluoroethylene at a volume ratio in the coating larger than 0% by volume and equal to or smaller than 40% by volume; and any of the nickel and the nickel-phosphorus alloy for the rest.

3 . The coating according to claim 2 , wherein the coating includes:
the particles made of polytetrafluoroethylene at a volume ratio in the coating equal to or larger than 10% by volume and equal to or smaller than 40% by volume; and any of the nickel and the nickel-phosphorus alloy for the rest.

4 . A flow path component with a coating, comprising:
a flow path component to be used in any of a gas turbine and a turbocharger, and to allow passage of a lubricating oil; and a coating to cover a surface of the flow path component, the surface being exposed to and coming into contact with the lubricating oil in a range approximately from 300 to 450° C., the coating including
any of nickel and a nickel-phosphorus alloy, and
particles made of polytetrafluoroethylene.

5 . The flow path component with a coating according to claim 4 , wherein the coating includes:
the particles made of polytetrafluoroethylene at a volume ratio in the coating larger than 0% by volume and equal to or smaller than 40% by volume; and any of the nickel and the nickel-phosphorus alloy for the rest.

6 . The flow path component with a coating according to claim 5 , wherein the coating includes:
the particles made of polytetrafluoroethylene at a volume ratio in the coating equal to or larger than 10% by volume and equal to or smaller than 40% by volume; and any of the nickel and the nickel-phosphorus alloy for the rest.

7 . The flow path component with a coating according to claim 4 , wherein
the flow path component includes at least one of
a sump chamber used in the gas turbine and configured to lubricate a bearing with the lubricating oil, and
a vent line connected to the sump chamber and configured to release the lubricate oil.

8 . The flow path component with a coating according to claim 4 , wherein
the flow path component includes
a sump chamber used in the gas turbine and configured to lubricate a bearing with the lubricating oil, and
a vent line connected to the sump chamber and configured to release the lubricate oil, and
the coating covers only the surface of each of the sump chamber and the vent line.

9 . The flow path component with a coating according to claim 4 , wherein
the flow path component is a bearing housing used in the turbocharger and including an oil supply path to supply the lubricating oil to a bearing, and the coating covers the surface of the oil supply path.

Assignees

• Ihi Corp

Inventors

• Yokoyama Fumihiko
• Kato Yuka

Classifications

• F16N21/00

  Conduits; Junctions (in general F16L); Fittings for lubrication apertures · CPC title

• F05D2300/432

  PTFE [PolyTetraFluorEthylene] · CPC title

• F01D25/00

  Component parts, details, or accessories, not provided for in, or of interest apart from, other groups · CPC title

• F16N29/00

  Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems · CPC title

• F05D2300/611

  Coating · CPC title