Dynamics of mechanisms with kinematic rolling pairsJournal of Machinery Manufacture and Reliability - Tập 40 - Trang 313-318 - 2011
V. I. Sergeev
We consider a number of characteristics of friction mechanisms related to continuously rated drives (variators) in which the motion in some kinematic pairs is transmitted by friction forces. It is shown that dynamic equations include nonholonomic constraints under these conditions, so the solution is carried out within the framework of generalized Lagrange equations.
Seismic isolators for petroleum and gas platforms of the “Sakhalin-2” projectJournal of Machinery Manufacture and Reliability - Tập 39 - Trang 591-604 - 2010
Yu. N. Drozdov, V. A. Nadein, V. N. Puchkov
Friction pendulum bearings have universal properties satisfying various demands when supporting buildings, bridges, and industrial facilities. The oscillation period of the bearing, vertical carrying capacity, damping, displacement ability, and ability to receive tensile load can be chosen independently. Dynamic oscillation periods from 1 to 5 s, shifts of up to 1.5 m, high carrying capacity and d...... hiện toàn bộ
Infinitesimal displacement analysis of a parallel manipulator with circular guide via the differentiation of constraint equationsJournal of Machinery Manufacture and Reliability - Tập 45 - Trang 398-402 - 2016
A. K. Aleshin, V. A. Glazunov, O. Shai, G. V. Rashoyan, S. A. Skvortsov, A. B. Lastochkin
This paper considers several subproblems associated with solving the forward and inverse position and speed problems and defining singular configurations for a parallel robot with six degrees of freedom and six kinematic chains that move along a circular guide (rotopod). The solution of these subproblems is necessary for analyzing the topological features of the parallel robot and employing the re...... hiện toàn bộ
Complex examination of a spindle drive unit of a profile-grinding machineJournal of Machinery Manufacture and Reliability - Tập 40 - Trang 165-170 - 2011
A. M. Shitov
The results of a complex examination of a spindle drive unit of a profile-grinding machine for a case involving bearing support failure are presented. A procedure, intended to examine a spindle drive unit by means of numerical models and experimental data, has been developed. A procedure for calculating the diagnostic parameter (unit’s compliance) is suggested. The reasons for low reliability of t...... hiện toàn bộ