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Reliability design and optimization design are modern design methods developed on the basis of traditional design. The reliability design can process the relevant design variables into random variables. The probabilistic mathematical model established according to the reliability design quasi-criteria can reflect the operating conditions more realistically, but the optimal solution is often not obtained for some design problems. Based on the optimization method of modern mathematics and computer program design, the optimal design can seek the optimal solution of engineering problems. However, some optimization design methods are to process the design variables into certain variables. The established mathematical model does not consider the reliability index, so that the operating conditions cannot be truly reflected. In order to make up for the shortcomings of reliability design and optimization design, try to combine the two to produce a new modern design method-reliability optimization design method. The application of this method in the design of a single-stage cylindrical gear reducer will be introduced here.
1.26; tooth thickness: s=! m/2=0.63; for gear 2, since the entire reducer has no gear number requirement, it is preliminarily determined a according to the correct meshing condition of the planetary gear a12 2 single-stage spur gear reducer reliability calculation 2.1 tooth surface contact fatigue strength Reliability is calculated as a simplified diagram of a single-stage column gear reducer. In the figure, 11 is a gear structure, and the pinion gear adopts a solid structure. The large gear adopts a four-hole web structure.
The calculation formula of the tooth surface joint fatigue strength of the gear meshing is cast iron = 162.0VBCa; the node area coefficient is! = 2.5; E - load factor and E = EaEfEj; G1 - nominal speed of the pinion transmission (N.mm) d - the allowable contact stress of the gear drive is the size))))))))))))) )))))))))))))))))))))))))))) As the output member, the planet carrier drives the crank to reverse the two working positions of the connecting rod, namely "open" and " close"
4 Conclusions The application of industrial design methods from the system point of view to product design in order to go to the rough, to falsely, is also the main content of modern design methods. The scheme designed here has achieved the expected results through the use of Shaanxi Yiren Technology Co., Ltd.