By Hung Nguyen-Schäfer
This publication comprehensively offers the computational layout of rolling bearings facing many interdisciplinary tough operating fields. They surround elastohydrodynamics (EHD), Hertzian touch thought, oil-film thickness in elastohydrodynamic lubrication (EHL), bearing dynamics, tribology of floor textures, fatigue failure mechanisms, fatigue lifetimes of rolling bearings and lubricating greases, Weibull distribution, rotor balancing, and airborne noises (NVH) within the rolling bearings. additionally, the readers are supplied with hands-on crucial formulation in line with the updated DIN ISO norms and invaluable examples for computational layout of rolling bearings.
The issues are meant for undergraduate and graduate scholars in mechanical and fabric engineering, examine scientists, and practising engineers who are looking to comprehend the interactions among those operating fields and to grasp how you can layout the rolling bearings for car and lots of different industries.
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Additional info for Computational Design of Rolling Bearings
However, the limiting speed of bearings can be improved by robust cage geometry and using strengthened material for the © Springer International Publishing Switzerland 2016 H. 1007/978-3-319-27131-6_2 19 20 2 Design of Rolling Bearings bearing cage. In general, the larger the bearing size, the lower the reference and limiting speeds are allowed and vice versa. Step 4: Computing the Hertzian Pressure in the Contact Area The maximum Hertzian pressure in the contact area between the balls and raceways is computed from the maximum shock loads in radial and axial directions, such as start-stop driving cycles or slipping torque conditions.
Electric motors), the gear or pulley is used to transmit the electric energy by means of the motor to generate the kinetic energy to the driving axis. , wind turbines, combustion engines) to the generator in order to generate the electric energy. In both cases, radial and thrust loads acting upon the transmitting gear or pulley must be at first computed from the driving torque and geometries of the transmitting elements [1, 2]. Step 2: Computing the Radial and Thrust Loads Acting Upon the Bearings The loads acting upon the bearing result from the radial and thrust loads of the gear or pulley and other loads acting on the rotor, such as unbalance force, UMP forces (unbalanced magnetic pull forces), rotor weight, etc.
10 −5 Compute RHSν +1 of Eq. 40) If RHSν +1 − LHS ≤ε LHS no yes Compute δ a = ρ a ρ 0 ⇒ α Fig. n 1 À cos γ 1À dγ 2ε ð2:48Þ where the exponent n ¼ 3/2 for ball bearings, n ¼ 10/9 for roller bearings, and γ is the angular position of the rolling element in the bearing. The parameter ε in the load integrals results from the bearing geometric relation as 1 δa tan α 1þ ε¼ 2 δr ð2:49Þ Substituting Eqs. 527 6 Axial Bearing Stiffness K ax [N/mm] 7 5 4 3 2 1 0 500 1000 1500 2000 2500 3000 3500 Bearing Axial Load Fa [N] 4000 4500 5000 Fig.
Computational Design of Rolling Bearings by Hung Nguyen-Schäfer