Dynamic Loading of Spur Gear Teeth

Abstract

The paper presents results of strain gage investigations conducted on steel spur gears to measure the instantaneous load on the tooth under static and dynamic conditions.

Deflection of Spur Gear Teeth Cut in Thin Rims

“…The foregoing analysis is found to be in agreement with previous experimental investigations [5][6][7], Fig. 18 shows the deflection curve of the double-peak shape, for a gear of the form of thin disk, by using the mechanical devices in measuring tooth deflection under static load [5].…”

“…Fig. 19(6) shows the oscilloscope records [6] for strain-gage measurement of the deflections of two different gear teeth in action. Positive and negative tooth deflections, at the start and end of contact, respectively, are clearly indicated.…”

“…7 tooth on a gear of the same dimensions as measured in a straingage investigation [6]. The strain gage was used as an extensometer by attaching it to a piece soldered on the tooth and to a disk fixed firmly to the body of the gear so that the gage bridged the gap in between.…”

“…In a strain-gage investigation [6] the deflection of the teeth cut in a gear on a form of thin disk 3 /s in. thick, was recorded.…”

“…19(a) Oscilloscope record for deflection of tooth when load is carried by single pair through all the path of contact, reference [6] Fig. 19(b) Oscilloscope records for deflection of gear teeth in action, reference [6] Fig. 20 Tooth deflection curves under different static loads as recorded by strain gages, reference [7] Angular Displacements Transactions of the AS ME trochoidal path these tips act as cams and change the load distribution between the teeth.…”