From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Analysis of the axial thrust forces on rollers and conoids within a mechanical system.
| Identifier | WestWitteringFiles\R\2October1927-November-1927\ 102 | |
| Date | 18th July 1927 guessed | |
| - 4 - effective in contributing to the torque, in the same sense as the forces L. The effect of these two sets of forces is that, before actual locking takes place, the driven shaft is subjected to a gradually increasing torque and is thus started up without a jerk. 3. Axial Thrusts on the rollers and conoids. The forces L and T (fig. 4) exerted by the outer member upon a roller have a resulting axial component in the sense Y to X, equal to L cos α - T sin α In practice the transverse forces T will be small compared with L, for the lateral slip is small where the normal pressure is large; on the other hand, at the Y - ends of the rollers, where there is appreciable transverse slip, the rollers are comparatively loose and the normal pressure slight, and the transverse frictional force will likewise be small. Thus it may be assumed that L cos α - T sin α will invariably be positive, or the outer member exerts upon the rollers an axial thrust in the direction Y to X. It has been stated in § 2 that the forces applied by the outer member to the rollers are transmitted by the latter to the inner member. But the mode of this transmission as regards the axial thrust calls for comment. If we denote by L¹, T¹ the longitudinal and transverse frictions exerted by a roller upon the inner member, let us leave T, T¹ out of account for the moment, as we have seen these are comparatively unimportant, and examine the relative magnitude of the forces L, L¹. Other things being equal, these are proportional to the velocities of longitudinal | ||