Table of Contents
Team Vision for Subsystem-Level Design PhasePlans for the subsystem design phase included:
-Select Final Design for Backlash Elimination
-Investigate Oil Flow Characteristics
-Machine and Test Additional Bearings
-Reintroduce Moog EMAs into our system
-Full Disassembly of Test Rig
Of our available options, we utilized several iterations of Pugh Analysis to decide on a final design for backlash elimination. We’ve decided to go with a pre-loaded spring applying a median 1000 lbs. of force to the system, as well as a pin redesign to make the system more user-friendly. This should also benefit the machine operator when needing to frequently disassemble the test rig. We are still in the process of investigating oil flow characteristics pertaining to journal bearings. We have very rudimentary calculations available, but more research will be going into determining critical parameters and more fundamental equations. We were fortunate enough to have been given additional bearings from a previous team, so redesigning them will be unnecessary. However, they will still need to be machined for our particular parameters. The EMAs were returned from Moog, and were integrated back into the rig setup. We’ve done some basic exercises in moving the EMAs, but have not successfully mimicked the compressor load profile as of now. We were able to disassemble the rig partially, but due to time constraints, the rig will be reassembled at a different time.
Feasibility: Prototyping, Analysis, Simulation
Oil Flow Preliminary Calculations
Pre-Load System Preliminary Calculations
Handwritten calculations can be found here.
The static equations were as follows:
And the following equations were used to determine the critical values below: