A Hydrodynamic Analysis of Fluid Flow between Meshing Spur Gear Teeth
Abstract
A one dimensional analysis of the fluid pumping action resulting from the meshing of spur gears was performed by writing a computer algorithm. Two separate analyses were conducted; one using incompressible and the other using compressible flow theory. The incompressible flow calculations correspond to heavily lubricated gears whereas the compressible flow calculations are representative of lightly lubricated gears. The analysis demonstrated that the velocity of the discharged fluid reached high velocities for both cases. The high meshing rate of the teeth along with the small discharge area is the cause for the high fluid velocities. Certain geometric design variables of the gears were seen to affect the peak velocities for each case. The variables most significantly affecting the peak velocity appear to be the drive ratio and the face width. The high velocities may contribute to the noise generated during meshing of gear teeth due to the jet noise as a result of the high velocity jets impinging on the enclosures surrounding the gears and the formation of shock waves at the exit plane of the teeth.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1987
- Accession Number
- ADA187671
Entities
People
- M. J. Pechersky
- M. J. Wittbrodt
Organizations
- Pennsylvania State University