-Test Rig Redesign-
-CAD Modeling-
Add an Axial Thrust Force to the Current Rig
50 Years of Incomplete Hand Drawings => One SolidWorks Assembly
Team BHI 2
Better Simulate Journal Bearing in a Tricone Bit
21k lbs.
Faculty Advisor Dr. Harold Stalford
Integrator of Documents Task: Early Failure Detection Jacob Bertelli
Sponsor/Advisors Baker Hughes David Gavia John Bomidi Mikey Benes Chris Lane
Team Accountant Task: Torque Measurement Blaise Newman Poster Liaison Task: Test Rig Redesign Russell Vanecek
Large Spherical Roller Bearing Must Support New Loading Conditions Current Radial 33° From Radial Only Axial
Current Test Shaft
Team Lead Task: CAD Modeling James Roecker
-Test Rig Support Bearing Analysis-
z
x
39k lbs.
39k lbs.
Radial Equivalent 39 k lbs. Load
With New Axial Thrust Face
SKF life 440,300 hr rating
33°
85 k lbs. 117 k lbs. 5,510 hr
Load Limits for Large Spherical Roller Bearing in Test Rig Current Radial Force on Bearing Requested 39k lb at 33 from z-axis 39 k lbs. axial thrust load Dynamic Load Limit (216k lb. for 1million cycles or 70hr) Fatigue Load Limit (27k lb.)
CAD Model and Redesign Journal Bearing Test Rig to Include an Axial Force, Early Failure Detection, and Torque Senor
-Purpose-
Max Safe Load (SF=2.5)
80000 70000 60000 50000
SF=1.9
40000 30000
SF=2.5
20000
SF=5.6
10000 0 0
50000
Test the Life and Durability of the Material Used in a Tricone Bit Journal Bearing Tricone Bit
Simulates the Radial Thrust Face in a Tricone Drill Bit
Journal Bearing Test Rig
Tricone Bit
100000
150000
200000
250000
Radial Force (lb.)
Better Simulate Down-Hole Forces => Improve Tricone Bit Life => Reduce “tripping� => Save Time and Money
-Current Shaft and Bushing-
1,010 hr
Recommendation: Reduce Axial Load (Above SF of 2.5) or Replace Bearing With A Twinline Tapered Roller Bearing
-Task-
-Current Test Rig-
39k lbs.
33k lbs.
Axial Force (lb.)
Project 7: Bearing Machine Upgrade
-New Axial Thrust Face-
-Test Shaft and Bushing RedesignBushing With Axial Thrust Face
Adding an Axial Thrust Face C2: Plug Hole C1: Smaller Cap
C3: Water Hose
Most Likely to Succeed
Journal Bearing Test Shaft and Bushing
-Test Rig Redesign To Apply Axial ForceC1: Sliding Trunnion Most Likely to Succeed
-Torque Measurement-
C2: Arched Piston (0-90 degrees)
Currently, Use Power Output of Motor to Calculate the Torque
Torque Estimation From Power Supplied
-Early Failure Detection-
Spike In Acceleration At 700-800Hz Before Failure
Digiducer
Maximum Power Output of ~4.2 Kw 9.5488 ∗ 4.2 đ??žđ?‘¤ đ?‘‡= = 1480 đ?‘™đ?‘?đ?‘–đ?‘› 240 đ?‘…đ?‘ƒđ?‘€
USB Accelerometer Software: Spectra Plus-SC 20 kHz Frequency Range Cost: 800$, 150$ for 30 day rental Severe Vibration
Radial Loading
Mount Trunnion on 2 TPA Linear Bearings
Option 1: Torsion/Shear Strain Gauges Cost: 3,021.95$ QuantumX MX440B Amplifier
Option 2: Torque Transducer Cost: 5,814.00$
HBM XY4x Strain Gauge
HBM T22
Rated Torque: 1770 lbin Rated Speed: 12,000 RPM
Frequency Change Related to Load
Place Torque Senor Behind Gear
Axial Loading
4 Strain Gauges Mounted on Specimen Holder Shell Motor Applying Torque
∆ 11,000 lb Add Second Poston For Axial Force