摘要:The paper deals mainly with how to set up a scientific data base for gear carrying capacities tests. The contents, functions and design methods of the scientific data base are discused.
摘要:In this paper, the principle and method of fuzzy reliability strength design for roller movable teeth speed reducers are presented based on the theory of fuzzy reliability, and corresponding calculation formulae are derived. A numerical example is given for illustration
摘要:Three kinds of typical transmission systems is obtained in this paper. First, the dynamic models is established by Lagrange equation. Then, the equivalent model is given with each lump mass located on one axis by linear transformation and proper general axes. Therefore, the original model is transformed to the three kinds of typical flexible transmission systems. The convenient conditions are offered for the theoretical analysis, design and calculation of flexible transmission systems.
摘要:In this paper, fuzzy factors in the design of planetary gear reducer is presented. The mathematical model of multi objects optimization on minimizing volume and maximizing bearing capacity is established. By fuzzy theory and method, the optimal solution is found. Example shows that the solution is not only satisfied but also according with the practical demands.
摘要:The modification of tooth profile can effectively decrease the impact,vibration, and noise, increase the load carrying capacity in gearing. Many kinds of methods of modificationhave been put forward in order to alleviate the stiffness fluctuation in gear engagement cycle and improve load distribution. From the viewpoint of improving the EHL conditions between gear teeth, with diagonal modification as an example, modification parameters are cptimized so that the optimum EHL effect can be achieved.
摘要:Some problems on helical gear contact stress finite element alalysis modeling are studied in this paper, including forming tooth surface, determining engaging position by means of the minimum length of contact lines, establishing the engaging relation of a pair of gears using coordinate transformation and obtaining the displacement constraint conditions suitable to the contact problem finite element analysis by defining the constraint equations of rigid motion of nodes. A finite element analysis modeling program for calculating contact stress of helical gears which includes the internal or external engagement mode and gear wheel structure is developed. The ADINA nonlinear finite element analysis program is used to a solver. The finite element analysis results of seven samples are verfied through the gear calculation standards of ISO, AGMA411.02, AGMA2001.
摘要:This paper put forward a kind of flexible member and four-bar combined mechanism with the flexible transmission and a link as input member of the mechanism, studied its transmission functions from zeroth to second order, analysed its six kinds of transmission characteristics and presented the geometric conditions of the input and output shafts with an arbitrary distance and a constantly angular velocity ratio. The designing example indicated that it can be provided with the advantages of desiging simple, manufacturing convenient and working stable.
摘要:Based on analysis of the consistency testing degree, this papel takes some efforts on the optimization to gear monitoring index set. By analysing the principal components of optimum monitoring index set, the paper makes it possible for identifying and monitoring gear operating condition, especially for detecting the occurrence of cracks on gears.
摘要:The method for optimizing the mechanism parameters of multi freedom planetary gearbox is discussed. The mathematical model of optimum is established. Based on gradation decreasing dimension method, the mathematical model is applied in scheme design of the gearbox. By the example analyzing, the effective of the method is proved.