Smooth Sliding is an engineering consulting company run by Dr. Dmitri Kopeliovich - Director of Research & Development of (305) 647-0739 and the founder of SubsTech (Substances & Technologies) â leading professional web site on Materials Science and Engineering. Dr. Dmitri Kopeliovich is an author of numerous scientific and engineering publications and patents.
Smooth Sliding provides independent engineering consulting services that help you to solve engine bearing related issues: failures, material selection, geometry design and optimization of hydrodynamic conditions.
Dr. Dmitri Kopeliovich is the world leading expert having 25 years of experience in design, technology and materials for engine bearings in applications such as automotive, renewable energy, aviation, racing and others.
To read more information about the various aspects of engine bearing operation please visit our sister website at substech.com
Failure of an engine bearing commonly leads to serious reconditioning works of the engine. Analysis of a bearing failure is a professional work employing great care and thoroughness. It is based on detailed observation of the failed bearing in combination of metallurgical investigation and in-depth consideration of the circumstances of the bearing work, such as fuel combustion, conditions and geometry of the crankshaft and functioning of the oil supply system.
Engine bearings are made of composite materials. They have multilayer structure comprising different metallic and non-metallic materials. The composition of each layer, its mechanical properties, adhesion to the adjacent layers and the micro-structure are specified for every bearing type. Complex metallurgical investigations of the bearing materials include optical microscope examination, hardness measurement, spectral and chemical analysis, electron microscope research and adhesion tests.
Engine bearings work under conditions of alternating loads, various rotation speeds, intermittent metal-to-metal contacts with the journals and in the presence of impurities transported in the oil. Selection of the optimal material for a particular bearing is determined by the operation conditions including maximum load, rotation speed, thickness of oil film, the engine type (diesel, gasoline), the bearing location (connecting rod, main or camshaft), its position (upper or lower).
Geometry of an engine bearing should provide optimal hydrodynamic conditions of the bearing friction, distribution of the load over the bearing surface and firm tightening in the housing. The geometry parameters such as clearance, eccentricity, crush height, oil groove and oil hole dimensions, crush relief, location lug design are analyzed and optimized.
The hydrodynamic conditions of bearing operation can be calculated theoretically. Such calculations are used for simulation of engine bearing performance under various conditions. Calculating the thermodynamic, dynamic, hydrodynamic and mechanical parameters of bearing operation result in values of maximum loads, minimum oil film thickness, oil temperature rise, power loss. When a bearing is being designed, theoretical simulation of hydrodynamic lubrication is performed to optimize bearing operation.
Bearing development is a complex work comprising theoretical calculations of thermodynamic, dynamic and hydrodynamic characteristics of the engine, selection of optimal bearing material or development of a new material, comprehensive metallurgical investigations, functioning tests of the prototype bearings and determination of technological processes for the bearings fabrication.
Director of Research & Development of 9124472188
World leading expert (25 years of experience) in design, technology and materials for Engine bearings in applications such as automotive, renewable energy, aviation, racing and others.
Founder and owner of SubsTech (Substances & Technologies) â a leading professional website on Materials Science and Engineering.
Author of numerous scientific and engineering publications and patents.
Founder and owner of Smooth Sliding - an engineering consulting company providing services that help to solve engine bearing related issues.