Dynamic Analysis of Crank-Piston Mechanism with Consideration of Impacts in Kinematic Pairs
For production and transportation of natural resources, including oil and gas, are widely used piston machines and pumps that due the action of large external forces represent the heavy duty systems. Due the impact of these forces are deteriorated actuati
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Dynamic Analysis of Crank-Piston Mechanism with Consideration of Impacts in Kinematic Pairs
6.1
Introduction
For production and transportation of natural resources, including oil and gas, are widely used piston machines and pumps that due the action of large external forces represent the heavy duty systems. Due the impact of these forces are deteriorated actuating elements of machines, and they often are failed. The kinematic and dynamic characteristics of piston machines and pumps actuator significantly are depended on clearances in the kinematic pairs that existence is caused due manufacturing process of on the external and internal pair’s elements and their deterioration. The last would be caused due friction in kinematic pairs and acting on machine external technological forces. Due the action of those forces in kinematic pairs of piston machines and pumps crank-piston mechanisms are developed large loadings that will causes in them an increase in the reaction forces due that in the kinematic pairs occurs large wear and accordingly increase of clearances. Due the action of variable forces in tolerance range of increased clearances occurs the additional motion of links that is caused due the different motions in elements of kinematic pairs (contact–contact, contact–break. break–contact, break– break), which causes an impacts between links. Simultaneously occurs the increasing of dynamical stresses in single links and vibration of whole mechanism. These impacts would be significant in values and at systematic repetition causes premature deterioration of kinematic pairs, failures and fracture of components and collapse of machines. Proceeding from the above mentioned, the selection of optimal size of clearance at that main dynamic characteristics of crank-piston mechanism would been within the permissible value, represents a very actual problem, because due the solution of these issues is increasing the reliability and durability of piston machines and their mechanisms.
© Springer Science+Business Media Singapore 2016 N. Davitashvili and V. Bakhshaliev, Dynamics of Crank-Piston Mechanisms, DOI 10.1007/978-981-10-0323-3_6
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6 Dynamic Analysis of Crank-Piston Mechanism with Consideration …
It is known that by scientists many times was arisen and solved the dynamic study tasks solution in hinged mechanisms with taking into account the clearances in kinematic pairs. In this regard important are works of I. Artobolevski, F. Cubba, N. Kobrinski, V. Nesterov, S. Kozhevnikov, V. Sergeev and K. Iudin, N. Freidenshtein and others, in that are considered the planar hinged mechanisms dynamic research tasks with clearances in kinematic pairs. Are studied additional motions of mechanisms in tolerances zones, when the angular velocity of driver link is constant value. The significant dynamical studies are carried out by Davitashvili et al. [73], Davitashvili and Abaishvili [16, 69, 74, 75] in point of planar and spherical four and five-bar hinged mechanisms research view with taking into account the clearances in one
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