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一、设计准则和计算方法滚动轴承最常见的失效形式是疲劳点蚀和塑性变形。对于那些在工作载荷下基本不旋转或转速极低的轴承,以限制产生的永久变形量为设计准则,仅需要进行静度强计算。对于一般机械中使用的轴承,以不发生点蚀破坏的可靠度 R=0.9时的寿命为额定寿命,以额定寿命恰好为10~6转时,轴承所能承受的载荷为额定动载荷,用字母 C 表示。轴承出厂前通过抽样测定了额定动载荷值,并给出在产品性能表中。当已知轴承所受的载荷 P、转速 n 和预选的使用寿命 L_h(以小时数表时的寿命)等条件时,按下式计算所需的额定载荷 C_j。
First, the design criteria and calculation methods Rolling bearing failure is the most common forms of fatigue pitting and plastic deformation. For those bearings that do not substantially rotate or rotate at very low speeds under service load, the design criterion for limiting the amount of permanent deformation to be produced requires only static strength calculations. For bearings used in general machinery, the reliability of pitting corrosion without R = 0.9 life of the rated life, the rated life of exactly 10 to 6 turns, the bearing can withstand the load for the rated dynamic load, with The letter C indicates. Bearing the factory measured by sampling the rated dynamic load value, and is given in the product performance table. When the known bearing load P, speed n and the pre-selected service life L_h (hours in hours of life) and other conditions, according to the following formula to calculate the required load rating C_j.