This paper presents the non-linear dynamic analysis of a flexible unbalanced rotor supported by ball bearings. The rolling element bearings are modeled as two-degree-of-freedom elements where the kinematics of the rolling elements are taken into account, as well as the internal clearance and the Hertz contact non-linearity. In order to calculate the periodic response of this non-linear system, ...

The paper presents some aspects regarding the deflections of new construction of ball-bearings with 35mm the dimension of the inner diameter, providing from the standard construction of the 6305 ballbearing. Different constructions were obtained using an algorithm, having another internal geometry, other dimensions of the rings and other number of balls, in the way to obtain higher static or dy...

This paper describes an in-depth evaluation of an abrasion testing procedure for concrete pavers developed in Australia The test involves abrasion of the paver surface by a rapidly rotating ball race under load. Water is used both to lubricate the race and to remove debris. The investigation included the study of factors affecting the test results such as the load applied to the ball-race, the ...

The aim of this experimental work was to achieve improvement the thermal efficiency of LPG stove and to save fuel. Due to the shortage of petroleum resources and its high prices, it is the duty of each and every person to save it. Most of the families in rural areas use wood or cow-dung for cooking purposes but it is not possible in urban areas. In urban areas, 90% houses consume LPG, as its us...

Condition monitoring of rotating machinery plays an important role in reducing catastrophic failures and production losses the 4.0 Industry. Vibration analysis has proven to be effective diagnosing machine failures. However, identifying bearing defects based on vibration remains a difficult task, especially non-stationary operation conditions. This work aims automate process under variable oper...

The Ball Bearing High Voltage generator is a fairly simple and transparent apparatus that can serve as tool to motivate conceptual descriptions calculations in electrostatics are normally presented our students rather dry matter-of-fact fashion.

An aerostatic spherical bearing has been developed for parallel kinematic machines. The design is based on a ball and socket configuration and is preloaded by permanent magnets arranged about the socket. High pressure air is injected through three orifices into the cavity between the ball and socket to produce a low friction, high accuracy interface. Joint accuracy is measured using a coordinat...