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Power Connections
Published in Milenko Braunovic, Valery V. Konchits, Nikolai K. Myshkin, Electrical Contacts, 2017
Milenko Braunovic, Valery V. Konchits, Nikolai K. Myshkin
In a joint with a combination of disc-spring (Belleville) washer and thick flat washers, the initial contact loss of contact force is considerably lower due to the beneficial action of the Belleville washer. Nevertheless, retightening improves even further the integrity of this joint. Since the creep and stress relaxation are responsible for the loss of contact force, from these results it can be inferred that retightening lowers the rates of creep and stress relaxation in bolted joints.580 It should be pointed out, however, that despite the beneficial effect of retightening on the mechanical and electrical stabilities of bolted joints, this method of mitigating the loss of contact force in bolted joints is rather impractical.
Bolted, Plug-On, and Busbar Connections
Published in Bella H. Chudnovsky, Transmission, Distribution, and Renewable Energy Generation Power Equipment, 2017
In a joint with a combination of disc spring (Belleville) washer and thick flat washers, the initial contact loss of contact force is considerably lower due to the beneficial action of the Belleville washer. Nevertheless, retightening improves even further the integrity of this joint. As the creep and stress relaxation are responsible for the loss of contact force, from these results it can be inferred that retightening lowers the rates of creep and stress relaxation in bolted joints. It should be pointed out, however, that despite the beneficial effect of retightening on the mechanical and electrical stabilities of bolted joints, this method of mitigating the loss of contact force in bolted joints is rather impractical.
Large thermal hysteresis NiTi Belleville washer fabricated by metal injection moulding
Published in Powder Metallurgy, 2020
Wenbo Li, Hao He, Dongyang Li, Yimin Li, Jia Lou, Zheyu He, Yongzhi Chen, Yi Xie
The ultimate purpose of the Belleville washer is to replace the traditional steel springs and provide more reliable restoring force. The loop resistance test results are shown in Figure 8. 16Mn steel spring washers are used as comparative fastening washers. The loop resistances of the NiTi and steel washers gradually increased, but that of the Belleville washer prepared by MIM is significantly lower than that of the ordinary spring washer.