Lubrication arrangement
First Claim
1. A lubrication arrangement for a gear combination, the arrangement comprising a housing for positioning about inter-locking gears, the inter-locking gears comprising a pair of bevel gears arranged perpendicular to each other, the housing having a spiral cross-section and including a scavenge off-take positioned substantially where the inter-locking gears come together at a mesh location and substantially tangential to the outer diameter of the inter-locking gears for scavenging oil at the mesh position.
0 Assignments
0 Petitions
Accused Products
Abstract
A lubrication arrangement for interlocking gears 2, 3 is configured by a housing 1 which incorporates sections 1a, 1b of a snail cross-section. Thus, rotating gears 2, 3 are positioned to generate a centrifugal pumping effect between those gears 2, 3 and the housing sections 1a, 1b which drives scavenged oil flow into a volute 11 formed by the opposing surface of the housing 1a, 1b. The scavenged oil is driven in the direction 13 towards an off-take 12 configured such that there is a minimum available cross-sectional area 14 between the housing at the intermeshing of the gears 2, 3 at an interlocking location 4. In such circumstances the scavenged oil is driven at relatively high speed through the off-take 12. Such relatively high speed scavenged oil 15 can be used for displacement scavenging in other parts of an engine or machine where problems exist with oil residence.
-
Citations
6 Claims
- 1. A lubrication arrangement for a gear combination, the arrangement comprising a housing for positioning about inter-locking gears, the inter-locking gears comprising a pair of bevel gears arranged perpendicular to each other, the housing having a spiral cross-section and including a scavenge off-take positioned substantially where the inter-locking gears come together at a mesh location and substantially tangential to the outer diameter of the inter-locking gears for scavenging oil at the mesh position.
-
6. A housing for a gear combination, the housing for positioning about inter-locking gears, the inter-locking gears comprising a pair of bevel gears arranged perpendicular to each other and including a scavenge off-take positioned in use relative to the inter-locking gears where the inter-locking gears come together at a mesh position and substantially tangential to the outer diameter of the inter-locking gears for scavenging oil at that mesh location,
wherein the housing has a spiral cross-section whereby in use variation in the available cross-sectional area between the inter-locking gears and the housing creates an effective centrifugal pump facilitating oil scavenging in use towards the scavenge off-take.
Specification