Influences of Taper Geometry Modified Oil-Grooves on Load Carrying Capacity of Crosshead Bearings

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概要

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• The crosshead bearing in large two-stroke diesel engines operates under severe lubrication conditions, because the bearing oscillates within a small angle at a low speed and is always subject to a high downward load. The recent trend towards more compact engines with increased output raises the bearing specific load, thereby causing the lubrication severity to increase significantly. Thus it is very important to improve the load carrying capacity of the crosshead bearing. In the present study, experiments using a dynamically loaded bearing seizure test apparatus were carried out to clarify the influences of the clearance ratio and the oil-groove geometry on the load carrying capacity. The electrical resistance of the oil film was also measured to evaluate the extent of the oil film formation. The major results are: (1) A decrease in the clearance ratio is effective in enhancing squeeze action on the entirety of the bearing pads, thereby improving the load carrying capacity. When the clearance ratio becomes too low, however, the ability to form an adequate wedge film is degraded, causing the load carrying capacity to decrease; (2) A significant improvement in the load carrying capacity can be expected, because incorporating the taper geometry on both sides of the oilgroove promotes a thicker oil film; and (3) A taper geometry with a subtended length of 5 degrees and a taper angle of 0.1 degree produces the maximum load carrying capacity.

• 一般社団法人日本機械学会の論文
• 2006-06-15

著者

• Kitahara Tatsumi

  Department Of Mechanical Engineering Science Faculty Of Engineering Kyushu University

• Kitahara Tatsumi

  Department Of Mechanical Engineering Science Kyushu University

• Otsubo Masaru

  Department Of Mechanical Engineering Science Kyushu University

• NAKAHARA Daisuke

  Daido Metal Co., Ltd.

• Nakahara Daisuke

  Daido Metal Co. Ltd.

関連論文

• Influences of Microporous Layer Design Parameters for Gas Diffusion Layer on Permeability and PEFC Performance
• Influences of Taper Geometry Modified Oil-Grooves on Load Carrying Capacity of Crosshead Bearings
• Studies on the Mixed Lubrication of Piston Rings
• Characteristics of Piston Ring Friction : Influences of Lubricating Oil Properties
• Experimental Studies on Friction and Scuffing Resistance of Ceramics for Cylinder Linear and Piston Ring
• Vibration Monitoring to Diagnose Incipient Seizure of Crosshead Bearings
• Mass-Energy Transfer process and Operation Diagnosis in PEFC

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