Lubricant Jet Flow Phenomena in Spur and Helical Gears With Modified Center Distances and/or Addendums—For Out-of-Mesh Conditions

Abstract

The work reported is an extension from a previous study which was limited to standard centers and tooth proportions only. This paper includes long and short addendums and modified center distances. The analysis develops the equations for the limit values of variables necessary to remove prior severe limitations or constraints necessary to facilitate computer analysis. A new computer program IMPOUT2 has been developed using these newly established “Limit Formulas” to prevent negative impingement on the pinion. The industrial standard nozzle orientation usually found where the offset S = 0 and inclination angle β = 0 will often cause the pinion to be deprived of primary impingement which can be an important cause of incipient scoring failure in high-speed drives.