Gas turbine engine

Patent metadata

Field	Value
Publication number	US-11732648-B2
Application number	US-202017638719-A
Country	US
Kind code	B2
Filing date	Aug 27, 2020
Priority date	Aug 30, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A gas turbine engine includes: a casing that accommodates a compressor and the like; bearings; a main lubricator including an oil mist generator that generates oil mist by mixing oil with compressed air extracted from the compressor and a first supply passage through which the oil mist is guided to the bearings; and a starting lubricator including a second supply passage through which a gas flowing out from a gas source is guided to a connection portion of the first supply passage, the connection portion being connected to the second supply passage, and an opener that starts supply of the gas from the gas source. The main lubricator supplies the oil mist to the bearings through the first supply passage by the pressure of the compressed air extracted from the compressor. When the opener starts the supply of the gas, the starting lubricator supplies the oil mist to the bearings by the pressure of the gas flowing out from the gas source.

First claim

The invention claimed is:

1. A gas turbine engine comprising,
a casing accommodating a compressor, a combustor, and a turbine;
bearings being in the casing;
a main lubricator including
an oil mist generator that generates oil mist by mixing oil with compressed air extracted from the compressor and
a first supply passage through which the oil mist is guided to the bearings; and

a starting lubricator including
a second supply passage that is connected to a portion of the first supply passage and through which a gas flowing out from a gas source is guided to a connection portion of the first supply passage, the connection portion being the portion of the first supply passage and
an opener that starts supply of the gas from the gas source through the second supply passage to the connection portion, wherein:

the main lubricator supplies the oil mist through the first supply passage to the bearings by pressure of the compressed air extracted from the compressor; and
when the opener starts the supply of the gas, the starting lubricator supplies the oil mist to the bearings through the second supply passage and a portion of the first supply passage located downstream of the connection portion, by the pressure of the gas flowing out from the gas source.

2. The gas turbine engine according to claim 1 , wherein:
the starting lubricator includes a cartridge that is attachable to and detachable from the second supply passage; and
the cartridge includes as the gas source at least one of a gas filled chamber that is filled with a high-pressure gas or a gas generating chamber that stores a gas generating agent.

3. The gas turbine engine according to claim 1 , wherein the opener is a three-way valve that switches between
a first position where a portion of the first supply passage located upstream of the connection portion and the portion of the first supply passage located downstream of the connection portion communicate with each other, and communication between the gas source and the portion of the first supply passage located downstream of the connection portion is blocked and
a second position where communication between the portion of the first supply passage located upstream of the connection portion and the portion of the first supply passage located downstream of the connection portion is blocked, and the gas source and the portion of the first supply passage located downstream of the connection portion communicate with each other.

4. The gas turbine engine according to claim 1 , wherein:
the main lubricator further includes a first backflow preventer that prevents a fluid from flowing from the connection portion toward the compressor;
the starting lubricator further includes a second backflow preventer that prevents the fluid from flowing from the connection portion toward the gas source; and
the second backflow preventer is the opener itself or is a device different from the opener.

5. The gas turbine engine according to claim 4 , wherein the opener is an on-off valve at the second supply passage or at a gas passage connecting the gas source and the second supply passage.

6. The gas turbine engine according to claim 4 , wherein:
the gas source includes at least one of a gas filled chamber that is filled with a high-pressure gas or a gas generating chamber that stores a gas generating agent; and
the opener includes
a stopper that closes a gas outlet of the gas filled chamber or a gas outlet of the gas generating chamber and
a destroyer that destroys the stopper.

7. The gas turbine engine according to claim 4 , wherein:
the starting lubricator further includes an oil storing chamber that is at the second supply passage and stores the oil;
the second backflow preventer is a check valve at a portion of the second supply passage located between the oil storing chamber and the connection portion; and
the opener is at a portion of the second supply passage located between the oil storing chamber and the gas source, a gas passage connecting the gas source and the second supply passage, or the gas source.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Fujii Takafumi
• Maesato Hikaru
• Okuwa Tatsuya
• Ichimura Shutaro
• Ikai Hiromasa

Classifications

• F02C7/06 Primary

  Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M) · CPC title

• F01D25/18

  Lubricating arrangements (of machines or engines in general F01M) · CPC title

• F05D2260/98

  Lubrication · CPC title

• F01D25/20 Primary

  using lubrication pumps · CPC title

• F16N7/32

  Mist lubrication (splash lubrication F16N7/26) · CPC title