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Understanding Bearing Shafts in Engineering Technology

Learn how bearing shafts are designed and stressed in engineering, including types such as permanent diameter and constant strength shafts. Explore calculations and hardness conditions for optimal performance.

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Understanding Bearing Shafts in Engineering Technology

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  1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Engineering technology Topic: Bearing shafts Prepared by: Ing. Jaroslav Hábl Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. Shaft strained by bending can be constructed as rotary or stationary. Shaft diameter is designed or checked in both cases. Shaft strained by bending stress and pressure in places of fitting other components. These shafts are grouped under bearing shaft group. There are divided into shafts with permanent diameter or permanent rigidity. These shafts do not transmit torsion moment and that is why we do not check them for the torsion stress. BEARING SHAFTS

  3. Permanent diameter shaft It has the same diameter through the whole length therefore the highest bending force have also the highest tensile strength. Bearing shafts

  4. Constantstrength shaft - calculation Strength condition for bending: Section modulus in bending Maximum bending moment Strength condition for pressure marking under the wheel: Bearing shafts

  5. Constant strength shafts It has graded diameter on the length. It enables to design such a shape where the tension is the same through the shaft length. Bearing shafts

  6. Constantstrength shaft – calculation Shaft diameter at the place of maximal bending moment: Shaft diameter at cross section x: Bearing shafts

  7. Constantstrengthshaft - calculation Hardness condition for pressure marking under the wheel: Bearing shafts

  8. Literature • Stroje a zařízení I, J. Doleček, P. Gajdoš, V. Novák • Strojnictví I, J. Doleček, Z. Holoubek • Strojnictví II, J. Doleček, Z. Holoubek • Moderní strojírenství, Josef Dilinger a kolektiv

  9. How are bearing shafts stressed. • What does bearing shaft with constant diameter mean? • Write down hardness condition for bending.

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