Lubrication device for helicopter

Patent metadata

Field	Value
Publication number	US-2022282782-A1
Application number	US-202217824579-A
Country	US
Kind code	A1
Filing date	May 25, 2022
Priority date	Jun 27, 2017
Publication date	Sep 8, 2022
Grant date	—

Abstract

A lubrication device for a helicopter including: an oil sump in which oil for lubrication is retained; a lubrication pump configured to suck the oil from the oil sump to discharge the oil; and a lubrication passage extending from the lubrication pump to a first lubrication target. The lubrication passage includes: a first supply port that supplies the oil to the first lubrication target; an oil reservoir provided upstream of the first supply port; and an opening provided upstream of the oil reservoir and above the oil reservoir. The first supply port is formed right above the first lubrication target.

First claim

What is claimed is:

1 . A lubrication device for a helicopter comprising:
an oil sump in which oil for lubrication is retained; a lubrication pump configured to suck the oil from the oil sump to discharge the oil; and a lubrication passage extending from the lubrication pump to a first lubrication target, wherein the lubrication passage includes: a first supply port formed right above the first lubrication target and configured to supply the oil within the lubrication passage to the first lubrication target; an oil reservoir provided upstream of the first supply port with respect to a flow direction of the oil; an opening provided upstream of an outlet of the oil reservoir and above the outlet of the oil reservoir, the opening being provided in the oil reservoir; and a second supply port provided upstream of the oil reservoir and configured to supply the oil in the lubrication passage to a second lubrication target.

2 . The lubrication device for a helicopter as claimed in claim 1 , wherein the opening is provided in an upper wall of the oil reservoir.

3 . The lubrication device for a helicopter as claimed in claim 1 , wherein the opening is provided downstream of the second supply port.

4 . The lubrication device for a helicopter as claimed in claim 3 , wherein the opening is provided in-line in the lubrication passage downstream of the second supply port.

5 . The lubrication device for a helicopter as claimed in claim 1 , further comprising a casing accommodating at least the oil sump, the lubrication pump, the first lubrication target and the oil reservoir,
wherein the opening is defined in an inner space of the casing.

6 . The lubrication device for a helicopter as claimed in claim 5 , wherein the lubrication passage further includes an oil cooler disposed outside the casing and configured to cool the oil in the lubrication passage, and
the opening is provided downstream of the oil cooler in the lubrication passage.

7 . The lubrication device for a helicopter as claimed in claim 1 , the first lubrication target and the second lubrication target are rotating members of a transmission, and
the first lubrication target rotates at a higher speed than that of the second lubrication target.

8 . The lubrication device for a helicopter as claimed in claim 1 , further comprising:
an auxiliary oil sump that reserves backup oil; an auxiliary lubrication pump configured to suck the oil from the auxiliary oil sump to discharge the oil; and an auxiliary lubrication passage connecting the auxiliary lubrication pump and the oil reservoir.

9 . The lubrication device for a helicopter as claimed in claim 8 , wherein when a hydraulic pressure in the lubrication passage is higher than a hydraulic pressure in the oil sump, the hydraulic pressure in the lubrication passage is higher than a hydraulic pressure in the auxiliary lubrication passage.

10 . The lubrication device for a helicopter as claimed in claim 8 , wherein the auxiliary oil sump is a recess formed at a bottom part of the oil sump,
a suction port of the lubrication pump is located above the recess in the oil sump, and a suction port of the auxiliary lubrication pump is located in the recess.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Fujii Isao
• Yamazaki Yuji
• Matsumoto Masatoshi
• Ogasawara Kenta

Classifications

• F16H57/0417 Primary

  Heat exchangers adapted or integrated in the gearing · CPC title

• F16H57/0442 Primary

  for supply in case of failure, i.e. auxiliary supply · CPC title

• F16H57/045

  Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case · CPC title

• F16H57/0465

  Drop-feed lubrication · CPC title

• F16H57/0441

  Arrangements of pumps · CPC title