Study on the measurement of oil-film pressure of engine main bearing by thin-film sensor ? The influence of bearing deformation on pressure sensor output under engine operation

The acquisition of the oil film pressure and forces on the bearing pads through experimentation is crucial to understanding the characteristics of journal bearing. Lots of efforts had been taken in film pressure measurement, and the pressure was obtained at specified position on the bearing pads. However, due to the space and structure constraint, merely very limited number of the point pressure can be obtained with traditional sensors and acquiring the detail pressure field on whole bearing pad surface is still an open challenge. In this paper, a method based on thin-film sensors technique is proposed and employed to measure the pressure distribution and oil film forces of journal bearings. The measurement is conducted on a cylindrical journal bearing with two axial grooves, and ElectroMechanical Film sensor arrays are designed and laid on the surface of the bearing pads. The oil film pressure is acquired at up to 32 measurement points in total along the bearing pads in both circumference and axial directions. The pressure distribution in a wide rotation speed range is obtained successfully by using fitting algorithm. Furthermore, the oil film forces on horizon and vertical direction are obtained through the integration of the measured pressure filed. The test results prove that it is feasible to measure the oil pressure filed of journal bearings using ElectroMechanical Film piezo-film sensor array.

Download Full-text

Fibre Optic Sensors for Long-Term Monitoring of Oil Film Pressure in Diesel Engine Main Bearing

Tribology Letters ◽

10.1007/s11249-014-0373-5 ◽

2014 ◽

Vol 56 (1) ◽

pp. 47-54 ◽

Cited By ~ 4

Author(s):

Markku Kapulainen ◽

Helena Ronkainen ◽

Ari Hokkanen ◽

Ingmar Stuns ◽

Simo Varjus ◽

...

Keyword(s):

Diesel Engine ◽

Fibre Optic ◽

Main Bearing ◽

Film Pressure ◽

Oil Film ◽

Long Term Monitoring ◽

Term Monitoring ◽

Oil Film Pressure

Download Full-text

Development of a Measurement Method of Contact Pressure between Gear Teeth Using a Thin-Film Sensor (Measurement of Pressure Distribution by Multi-Point Pressure Sensor with Shared Lead Films)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.77.3938 ◽

2011 ◽

Vol 77 (782) ◽

pp. 3938-3950 ◽

Cited By ~ 1

Author(s):

Michiyasu OWASHI ◽

Yuji MIHARA

Keyword(s):

Thin Film ◽

Pressure Distribution ◽

Pressure Sensor ◽

Measurement Method ◽

Film Sensor ◽

Thin Film Sensor ◽

Gear Teeth ◽

Point Pressure ◽

Sensor Measurement ◽

Lead Films

Download Full-text

Full Shafting-Based Elastohydrodynamic Lubrication Simulation for Main Bearings of Marine Diesel Engine

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.479-481.1119 ◽

2012 ◽

Vol 479-481 ◽

pp. 1119-1123 ◽

Cited By ~ 1

Author(s):

Hui Xing ◽

Hui Zhang ◽

Qili Wu ◽

Shu Lin Duan

Keyword(s):

Diesel Engine ◽

Marine Diesel Engine ◽

Main Bearing ◽

Film Pressure ◽

Oil Film ◽

Marine Diesel ◽

Simulation Results ◽

Lubrication Characteristics ◽

The Impact ◽

Oil Film Pressure

To predict and analyze accurately the lubrication characteristics and its influencing factors of main bearing for large low-speed two-stroke marine diesel engine, based on EHD lubrication model of dynamically loaded bearing, coupling simulation between EHD and MBD for main bearing of marine diesel engine was carried out. Systemic models were established separately considering the independent crankshaft of diesel engine and the full shafting of propulsion power plant. Main bearing load, peak oil film pressure, oil film pressure distribution, MOFT and orbital path in one working cycle under rated working conditions were investigated, and simulation results were compared based on both models. The results show that, if the impact of full shafting was considered, the lubrication characteristics of No.8 main bearing changed significantly, the lubrication characteristics of other main bearings were similar as the simulation results of the independent crankshaft model.

Download Full-text