scholarly journals Endurance Tests With Large-Bore Tapered-Roller Bearings to 2.2 Million DN

1982 ◽  
Vol 104 (3) ◽  
pp. 293-298 ◽  
Author(s):  
R. J. Parker ◽  
H. R. Signer ◽  
S. I. Pinel
Keyword(s):  
High Speed ◽  
Roller Bearings ◽  
Standard Design ◽  
Endurance Tests ◽  
Life Tests ◽  
Tapered Roller ◽  
High Speed Design ◽  
Tapered Roller Bearings ◽  
Hoop Stresses ◽  
Thrust Load

Endurance life tests were run with standard design and optimized high-speed design 120.65-mm- (4.750-in.-) bore tapered-roller bearings at shaft speeds of 12,500 and 18,500 rpm, respectively. Standard design bearings of vacuum melted AISI 4320 and CBS-1000M, and high-speed design bearings of CBS-1000M and through-hardened AISI M-50 were run under heavy combined radial and thrust load until fatigue failure or until a preset cutoff time of 1100 hours was reached. Standard design bearings made from CBS 1000M material ran to a 10-percent life approximately six times rated catalog life. Twelve identical bearings of AISI 4320 material ran to ten times rated calalog life without failure. Cracking and fracture of the cones of AISI M-50 high-speed design bearings occurred at 18,500 rpm due to high tensile hoop stresses. Four CBS 1000M high-speed design bearings ran to twenty-four times rated catalog life without any spalling, cracking or fracture failures.

scholarly journals Performance of Computer-Optimized Tapered-Roller Bearings to 2.4 Million DN

1981 ◽  
Vol 103 (1) ◽  
pp. 13-20 ◽  
Author(s):  
R. J. Parker ◽  
S. I. Pinel ◽  
H. R. Signer
Keyword(s):  
Heat Generation ◽  
High Speed ◽  
Roller Bearing ◽  
Inlet Temperature ◽  
Tapered Roller Bearing ◽  
Roller Bearings ◽  
Operation Temperature ◽  
Tapered Roller ◽  
High Speed Design ◽  
Tapered Roller Bearings

The performance of 120.65-mm (4.75-in.) bore high-speed design tapered roller bearings was investigated at shaft speeds of 20,000 rpm (2.4 million DN) under combined thrust and radial load. The test bearings design was computer optimized for high-speed operation. Temperature distribution and bearing heat generation were determined as a function of shaft speed, radial and thrust loads, lubricant flow rates, and lubricant inlet temperature. The high-speed design tapered roller bearing operated successfully at shaft speeds up to 20,000 rpm under heavy thrust and radial loads. Bearing temperatures and heat generation with the high-speed design bearing were significantly less than those of a modified standard bearing tested previously. Cup cooling was effective in decreasing the high cup temperatures to levels equal to the cone temperature.

The Effect of Misalignment on the Fatigue Life of Tapered Roller Bearings

1972 ◽  
Vol 94 (2) ◽  
pp. 181-186 ◽  
Author(s):  
H. Zantopulos
Keyword(s):  
Experimental Study ◽  
Fatigue Life ◽  
Test Data ◽  
Load Distribution ◽  
Roller Bearings ◽  
Bearing Life ◽  
Life Tests ◽  
Tapered Roller ◽  
Tapered Roller Bearings ◽  
Sufficient Test

A comprehensive analytical and experimental study of the effect of misalignment on load distribution and fatigue life of tapered roller bearings is presented. Included are the effects of truncation of crowned rollers and edge of contact stresses. Bearing life tests, involving approximately 500 bearings, were run at various loads and misalignments to obtain sufficient test data to substantiate the analytical results.

Finite Element Analysis of Cartridge Tapered Roller Bearing of Freight Wagon

2018 ◽  
Vol 10 (3) ◽  
Author(s):  
Parbant Singh ◽  
S.P. Harsha
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Roller Bearing ◽  
Element Analysis ◽  
Tapered Roller Bearing ◽  
Roller Bearings ◽  
Standard Design ◽  
Rail Industry ◽  
Tapered Roller ◽  
Tapered Roller Bearings

Freight trains run under high service loads during consignment loading and operation so tapered roller bearings are ideally suited to wheel bearing applications. The tapered roller bearings used in the railway industry are of a standard design fixed by the American Association of Railroads regulations. Nowadays rail industry improves the train operating speeds, which means that failure of a bearing will result into a derailment, affecting human lives, network disruption, and damage to the railroad, unplanned maintenance costs, and generating fear in general public about rail transport. So the rail industry has focused on the improvement in maintenance work and improvement in component design. This paper discusses the results of finite element analysis and model analysis of Cartridge Tapered Roller bearing (CTRB). Solid modelling of CTRB has been done using solid works. The CTRB is then discretized using ANSYS software and 3D hexahedral solid elements are used to mesh the components. The effect of vibration modes on the dynamic behaviour and stability of wagon is described. Frequencies up to a range of 100 Hz are considered for mode shapes.

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