| With developing of increasingly towards modern machinery high precision, high reliability, there will be a very high requirement to the kinematic reliability .The factors that affect kinematic reliability are with complexity and randomness, with the addition of a late study of reliability in China, so there are a lot of work needs to be done about the study of kinematic reliability.The first, beginning from the reliability of single kinematic reliability, the theory of mechanism errors and wear of motion pairs were discussed, the influence to a motion reliability of a mechanism with an origin error of a mechanism and original space and the wear of pairs were analyzed, a analytical model of the motion reliability for a single mechanism was established, based on these work, a analytical model of the motion reliability for the multi-mechanism system was established. the models were applied to several typical mechanisms to analyze their motion reliability. Via research for the paper, acquiring some research achievements, now the main research contents and results are summarized as follows:1. Establishing universal institution error analysis models on the basis of analysis about institution error root, applying transformation institution method, establishing the slider-crank mechanism and four-bar linkage hinge position error analysis model respectively, using influence coefficient method, setting up computation model of cam mechanism site error.a position errors cam model. Making beam pumping unit main institution—crank and rocker mechanism as an example, according to the model being established, and compilling calculator program calculation program using MATLAB software, proceeding on application analysis to sucker stroke error, which verifies the validity of the model and analysis method feasibility.2. Proposing the idea to study the main body abrasion of the stability phase to solve kinematic pair abrasion. Body movement component based on the force, velocity, and the characteristics of cyclical cycle Vice continuous contact kinematics theory, for the sports wear to adhesive wear, vice conclusions based on the Archard wear model has been improved, the establishment of a body moving pairs Wear practical calculation mode(?_w =k_sp_sv_sj_sn_s+k_hp_hv_hj_hn_h).3. Proposing basing on analysis of deputy element movement of any time relative speed, kinetic theory of institutions by force, the deputy campaign wear simplified into two convex and concave cylindrical rigid continuous contact model, the use of Hertz contact stress calculation formula to determine The location of the contact stress, according to sets of holes and the Shaft of the characteristics of relative motion, determine the number of units of periodic wear, wear model to solve the kinematic pair of the specific application.4. According to the stress - strength interference model, were established:?considered in the original error,?also considered in the original error and the original space,?the original error of considering the institution of the original space and the movement of the three Vice-wear Reliability of Mechanism Model. Using the model and a computer program written by self in MATLAB to calculate the reliability of the movement of a slider-crank mechanism.5. Basing on the study of reliability of individual institutions, according to the system reliability theory and composition characteristics of multi-agency system, transmission system by a complex body composition in series, parallel combination and hybrid combinations of three types, namely the establishment of the corresponding output error model agency.6. Analysis of the various combination agencies in transmission types, arranged orders, as well as the size of the transmission organization gear ratio output accuracy, their effect to accuracy of the transmission out .and sub-sector allocation exercise was discussed, the use of more established body motion of the system error model, the transmission mechanism of the vibrating screen of the example application. |
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