Bevel-helical gear unit B4 only other lubrication variants available on req B4-HV-20-A

Flender/Flender Gear Units/Bevel-helical gear unit B4

Transverse module at cone distance Rxmxt2Rx zp(3. Normal module at Rx mxnmxtcosx (3. Triangles from Fig. 3.2 RxcosxP0sinx (3. It follows from (3. and (3. that:mxn2P0sinx zp(3.3.4 Displacement Behavior 8 According to Equation (3., the normal module is maximum when is 9/C1. This point on the pitch cone is referred to as the point. At this point, the parameters of the lengthwise curvature are equivalent to those of an involute. The largest possible normal module is obtained with the point in the center of the tooth. It follows: rc0Rmsinm 3:4 These conditions are termed the rectangular case. Its particular properties with reference to displacement behavior are shown in Fig. 3.2. The behavior of the contact pattern for displacement is scarcely altered when compared to that in Fig. 3.2, but the direction of the displacement now runs parallel to the line such that typically load-induced total H displacement does not signicantly change the position of the contact pattern. Because it is necessary to account for both the geometry of the gear and the inuences from the environment when considering the load capacity of bevel gear set, designs with the rectangular case have the highest load capacity. There is barely any displacement of the center of the contact pattern under load, such that the leverage of the exerted force on the tooth root is not increased. And the normal module is at its greatest at the point of maximum stress. Fig. 3.2 Spiral angle, cone distance and tool radius of the virtual crown gear Fig. 3.2 Displacement behavior in the rectangular case8 3 Design 3.4.5 Ease-Off Design After establishing the fundamentals of the behavior of contact pattern displacement, this section examines the possibilities for tooth ank design to obtain low-noise gear with good load capacity. At given load, smooth contact of the tooth anks is desirable in order to minimize the transmission error and hence noise excitation. To obtain gear with high load capac