Bevel gear lubrication and cooling

• US 4,667,774 A
• Filed: 09/20/1985
• Issued: 05/26/1987
• Est. Priority Date: 09/20/1985
• Status: Expired due to Term

• Current Assignee: United Technologies Corporation (Rtx Corporation)
• Original Assignee: United Technologies Corporation (Rtx Corporation)
• Inventors: Roberge, Gary D.
• Primary Examiner(s): Croyle, Carlton R.
• Assistant Examiner(s): Obee, Jane E.
• Application Number:
  US06/777,990
• Time in Patent Office: 613 Days
• Field of Search: 184/6.12, 184/6.22, 184/15.2, 184/65, 74/467, 74/468
• US Class Current: 184/6.12
• CPC Class Codes: F16H 1/14 comprising conical gears only
• CPC Class Codes: F16H 57/0456 Lubrication by injection; Injection nozzles or tubes therefor oil mist or spray lubrication F16H57/0458
• CPC Class Codes: F16H 57/0493 Gearings with spur or bevel gears differentials with spur or bevel gears F16H57/0483
• CPC Class Codes: F16N 7/40 in a closed circulation system

Abstract

Lubrication of a pinion and bull gear arranged in a bevel gear orientation is accomplished by discharging a stream of lubricant through a nozzle and onto the surface of the pinion web section. Centrifugal forces due to rotation of the pinion cause the lubricant to spread radially outwardly on the web section surface and to form a film thereon. A portion of the lubricant is thrown off of the pinion as the pinion rotates, and strikes the teeth of the bull gear, thereby lubricating the contact surfaces of the bull gear teeth.

Claims

1. A gear system comprising a first gear, a second gear, and means for rotating said first gear at high speeds, wherein said first and second gears each have an axis of rotation, a central web section, and a plurality of teeth, said gears arranged in a bevel gear orientation such that said first gear teeth mesh with said second gear teeth, and rotation of said first gear causes said second gear to rotate therewith, said gear system also including an improved apparatus for lubricating said gears, said apparatus comprising:

(a) a lubricant supply; and

(b) a nozzle means in fluid communication with said supply, wherein said nozzle means is constructed and arranged to discharge a stream of lubricant directly onto said first gear web section, said gears arranged such that lubricant discharged onto said web section is thrown off said web section due to centrifugal forces while said gears rotate, and strikes said teeth of said second gear prior to the mesh point of said first gear teeth and said second gear teeth.

2. The gear system of claim 1, wherein said first gear is a pinion and said second gear is a bull gear.

3. The gear system of claim 2, wherein said axes of rotation intersect at an angle between about 75°

and 105°

, and said nozzle means is arranged to direct the stream of lubricant onto said pinion and near the axis said pinion, such that the stream of lubricant strikes said pinion web sections at an angle between about 30° and

60°

.

4. The gear system of claim 3, wherein said lubricant supply includes means for controlling the temperature of the lubricant within a desired temperature range.