Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Connecting Rod Shank Strain Measurements

Status
Not open for further replies.

DougCarne

Mechanical
Joined
Nov 22, 2002
Messages
1
Location
AU
Seeking advise on wireless strain gauge measuring of connecting rod shank at designated engine speeds relative to crankshaft position.
 
Doug,

Good luck. I've looked into this several times and it seems that for the moment there is no reliable way to make these measurements with wireless technology. Not that it hasn't been tried, its just that the g forces are so great that the transducers don't live. Mahle has a photo in their piston guide of a 2 part linkage that attaches to the piston pin on one end, and the crank case wall on the other. This linkage moves with the piston and gives a path to run wires so they are supported. I don't know a max speed this will survive but it might be worth a try.
 
The monkey arms (aka grasshopper linkages) are also quite prone to failure.
 
It may well be better to attempt measurement of crank torsional stress and make certain deductions. Another consideration might be an optical strain, but high speed triggered viewing could be a challange.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top