Fluid damping system for traction drive
AssigneeSuperTurbo Technologies, Inc.
InventorJared Howe
Life of this patent
Estimating the term…
Abstract
Disclosed is a fluid damping system for a planetary traction drive designed for a driven turbocharger on an engine. The planetary traction drive has a plurality of double roller planets that are each supported by two planet hearings, one at each end of the double roller planet. Each planet bearing has a fluid damping system that consists of a radial squeeze film damper that feeds fluid to an axial squeeze film damper to absorb vibrations and dissipate kinetic energy in the planetary traction drive.
Claims19
A planetary traction drive comprising:
- a sun shaft;
- a plurality of double-roller planets that interface with said sun shaft, each of said double-roller planets mounted in a carrier on a first planet bearing and a second planet bearing at opposite ends of said double-roller planets, where both said first planet bearing and said second planet bearing have a fluid damping system comprising:
- a bearing pin with a fluid supply port;
- at least one fluid feed hole that supplies fluid to a radial squeeze film damper between said bearing pin and an inner surface of an inner race of said planet bearing;
- an axial squeeze film damper that receives fluid from said radial squeeze film damper and is located between a face of said inner race of said planet bearing and an axial land piece of said carrier,
- wherein said radial squeeze film damper and said axial squeeze film damper absorb vibrations from said planetary traction drive;
- a ring roller that interfaces with said plurality of double-roller planets.
A method of providing radial and axial damping of a planetary traction drive comprising:
- providing a sun shaft;
- interfacing a plurality of double-roller planets to said sun shaft;
- supporting each of said plurality of double-roller planets with a first planet bearing and a second planet bearing coupled to a carrier, where said first planet bearing and said second planet bearing have a fluid damping system that:
- supply fluid to a radial squeeze film damper through at least one feed hole;
- supply fluid from said radial squeeze film damper to an axial squeeze film damper;
- dissipate kinetic energy from said planetary traction drive through said radial squeeze film damper and said axial squeeze film damper;
- interfacing a ring roller to said plurality of double-roller planets.
A planetary traction drive comprising:
- a sun shaft;
- a plurality of double roller planets that interface with said sun shaft, each of said double roller planets mounted in a carrier on a first planet bearing and a second planet bearing at opposite ends of said double roller planets, wherein said first planet bearing and said second planet bearing have a fluid damping system comprising:
- a full axle radial squeeze film damper located between a carrier axle and a sleeve, wherein said carrier axle has fluid feed holes that supply fluid to said full axle radial squeeze film damper and said first planet bearing and said second planet hearing are mounted on opposite ends of said sleeve;
- a first axial squeeze film damper and a second axial squeeze film damper that receive fluid flow from said full axle radial squeeze film damper through secondary fluid feed holes wherein said full axle radial squeeze film damper and said first axial squeeze film damper and said second axial squeeze film damper absorb vibrations from said planetary traction drive;
- a ring roller that interfaces with said plurality of double roller planets.
Dependencies are inferred from the claim text.