A high performance engine has 7 main crankshaft bearings and runs at 17,500 rev min–1. Other data...

Question

A high performance engine has 7 main crankshaft bearings and runs at 17,500 rev min–1. Other data are given below. Assuming the engine is running at the oil reference temperature of 40oC, use Petrov’s equation to determine the maximum power absorbed by the main bearings. Comment on whether this would be likely in reality.

David · Accepted Answer

1
Given data  
Number of crankshaft bearing = 7  
Run = 17500 rev per min  
Reference temperature = 40  
Journal diameter = 54mm 
Bearing axial length = 25.4 mm  
Radial clearance = 0.025 mm  
Oil viscosity = VG 32 
Oil density = 890 kg per m
3
 
Maximum power absorbed by main bearings by using Petrov equation =?
Now,

A high performance engine has 7 main crankshaft bearings and runs at 17,500 rev min–1. Other data are given below. Assuming the engine is running at the oil reference temperature of 40oC, use Petrov’s...

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