误差-磨损-温度变化耦合的行星滚柱丝杠副载荷分布
发布时间：2018-11-24 07:55
【摘要】：为了揭示误差-磨损-温度变化耦合作用对行星滚柱丝杠副(PRSM)螺纹载荷分布的影响规律,基于变形协调关系,建立了计及误差、磨损和温度变化的PRSM载荷分布模型。通过与现有有限元模型和弹簧模型对比,最大相对误差为8.36%,表明所建模型正确且可用于载荷分布规律研究。在此基础上,研究了无误差、含误差和磨损、以及含温度变化的载荷分布规律。结果表明,误差是导致载荷不均和波动的主因;磨损加剧了载荷分布不均及波动;温度变化造成载荷分布规律发生变化并以中间螺纹为基准呈近似对称分布,且当温度变化达到80℃时,最大载荷增加了9.2%,可见温度变化会增大单个螺纹承载量并导致过载风险;温度变化为40℃时,载荷分布相对更加均匀,控制温度变化可作为改善PRSM载荷分布的有效方法。
[Abstract]:In order to reveal the influence of error-wear-temperature coupling on the load distribution of (PRSM) thread of planetary roller screw, a PRSM load distribution model considering error, wear and temperature variation was established based on the deformation coordination relationship. Compared with the existing finite element model and spring model, the maximum relative error is 8.36, which shows that the model is correct and can be used to study the law of load distribution. On this basis, the load distribution law of no error, containing error and wear, and temperature change is studied. The results show that the error is the main cause of the unevenness and fluctuation of the load, and the wear and tear accentuates the uneven distribution and fluctuation of the load. The variation of temperature results in the change of load distribution law and approximately symmetrical distribution based on intermediate thread. When the temperature change reaches 80 鈩，
本文编号：2352878
[Abstract]:In order to reveal the influence of error-wear-temperature coupling on the load distribution of (PRSM) thread of planetary roller screw, a PRSM load distribution model considering error, wear and temperature variation was established based on the deformation coordination relationship. Compared with the existing finite element model and spring model, the maximum relative error is 8.36, which shows that the model is correct and can be used to study the law of load distribution. On this basis, the load distribution law of no error, containing error and wear, and temperature change is studied. The results show that the error is the main cause of the unevenness and fluctuation of the load, and the wear and tear accentuates the uneven distribution and fluctuation of the load. The variation of temperature results in the change of load distribution law and approximately symmetrical distribution based on intermediate thread. When the temperature change reaches 80 鈩，
本文编号：2352878
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