Potential of oil-lubricated cylindrical plastic gears
Potential of oil-lubricated cylindrical plastic gears
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DOI：
10.1299/jamdsm.2018jamdsm0016
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发表时间：
2018-01-01
影响因子：
0.9
通讯作者：
Stahl, Karsten
中科院分区：
文献类型：
--
作者：
Hasl, Christian;Illenberger, Christopher;Stahl, Karsten
在油润滑的背靠背试验中，研究了注塑聚缩醛试验齿轮的弯曲强度。为了验证最新的计算方法，研究了具有可变齿数的齿的几何形状，保持恒定的中心距离和传动比。为了能够在恒定的齿温水平上进行可变扭矩负载和转速的测试，在以后的测试中会测量并考虑出现的齿温。试验结果表明，齿数越多，齿根应力越大，齿根抗弯强度越高。VDI 2736，因为由于忽略了载荷引起的变形，计算出的齿根应力太高。一种改进的计算齿根应力的方法考虑了载荷引起的变形，允许将不同牙齿几何形状的故障追溯到共同的应力水平。因此，提出了在计算钢塑直齿圆柱齿轮副的齿根应力时考虑实际重合度的一种可能方法。
Bending strength of injection molded polyacetal test gears is investigated in back-to-back testing using oil-lubrication. To validate state of the art calculation methods, tooth geometries with a variable number of teeth are investigated, maintaining a constant center distance and transmission ratio. To enable testing on a constant level of tooth temperature for variable torque loads and speeds, occurring tooth temperatures are measured and considered in latter testing. Test results show that bending strength of tooth geometries with a higher number of teeth stand higher tooth root stresses acc. to VDI 2736, as the calculated tooth root stress is too high due to negligence of load-induced deflections. A modified method for calculating tooth root stress considers load-induced deflections, allowing to trace back the failures of the different tooth geometries to a common stress level. Therefore, a possible approach to consider the actual contact ratio for tooth root stress calculation of steel-plastic spur gear pairings is proposed.