H4-HH11-B paper production Sifter gear units Gear units f Helical gear Reduction Boxes H4

Flender/Flender Gear Units/Helical gear Reduction Boxes H4

Hertzian contact attening atcontact points are regarded as crucial. On solid gear bodies, the magnitudes ofcompressive deections are usually negligible in comparison to other deections.4.4 Stress Analysis 1 Determining tooth deection Solving the contact problem by means of the inuence numbers method supposes that pinion and wheel tooth are sub-divided into several segments along the face width at which different deections may occur. The load along the contact line is dissected into individual forces corresponding to these sub-divisions, with the load acting in the middle of each considered segment. These segments are interlinked by means of imaginary springs, which is true for all form alterations with the exception of Hertzian contact attening (deformation). Besides, the segments are created by means of spherical sections of radius rthrough the bevel gear tooth (Fig. 4.. An arbitrary line of intersection between the sphere and the tooth ank/llet yields prole line. tooth segment is accordingly formed by two spheres and the prole lines. point of intersection between prole line in the middle of segment and contact line (calculated with the load-free tooth contact analysis) is the working point of an individual force and is described by polar coordinates rand. The grid thus created on the wheel tooth is transformed to the pinion tooth in correspondence with the contact line. The position of any desired point on prole line can be calculated by using tting surfaces and tooth thickness, such that the exact dimen- sions of the models for stress calculation on the tooth segments are available. Since models of this kind are not adaptable to analytical calculation, the spherical surfaces of the segment sides are disregarded, and are approximated by plane surfaces. The method, which is detailed subsequently, includes the deection of tooth segments lying at distance from the working point, at which the force is acting with the aid of an applied generalized fading fun