NASA Technical Reports Server (NTRS) 20000031361: SSME Bearing and Seal Tester Data Compilation, Analysis and Reporting; and Refinement of the Cryogenic Bearing Analysis Mathematical Model

346 Pages·18.5 MB·English

by  NASA Technical Reports Server (NTRS)

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SSME BEARING AND SEAL TESTER DATA
COMPILATION, ANALYSIS AND REPORTING;
AND REFINEMENT OF THE CRYOGENIC BEARING
ANALYSIS MATHEMATICAL MODEL
Final Report
for
Contract No.' NAS8-39379
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Prepared for
Mr. Howard G. Gibson
Materials and Processes Laboratory
Engineering Physics Division
George C. Marshall Space Flight Center
Marshall Space Flight Center
TECHNOLOGIES
FOREWORD
This final report was p:epared by SRS Technologies under Contract No. NAS8-39379 for
w the George C. Marshall Space FIight Center of the National Aeronautics and Space
Administration. This work was administered under the technical direction of the Contract
Officer's Technical Representative, Mr. Howard G. Gibson of the Materials and Processes
Laboratory, Engineering Physics Division.
This final report describes the work performed by SRS Technologies during the period of
January 1992 through January 2000. Mr. James D. Moore served as the SRS Technologies
= : Principal Investigator. Mr. Joe C. Cody serves as an SRS Consultant on this contract.
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CONTENTS
SECTION PAGE
1.0 Bearing Analysis Software Improvements ...................................................................... 1
1.1 45 MM Bearing Model Conversion to PC SINDA/SHABERTH ........................... 2
1.2 Version 1.2 of PC SHABERTH Completed ............................................................ 2
1.3 ADORE Version 32. Installed on EADSII Computer System ................................ 7
1.4 Development of Hybrid Fluid Film Bearing/Rolling Element Bearing Shaft
__I Support Analysis ...................................................................................................... 8
1.5 Later Revision and Improvements to the Hybrid Fluid Film/Rolling Element
Bearing System Model ........................................................................................... 17
1.6 Analysis of ATD Beam Springs ............................................................................ 20
1.7 MathCAD Program for Three Ring Fit Analysis ................................................... 23
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1.8 Three Ring Fit Analysis Added to SINDA/SHABERTH Bearing Model ............. 25
1.9 Modification of SINDA]SHABERTH Model Preload Routine ............................. 27
1.10 Investigation of Bearing Ring Flexing Model ......................................................... 30
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1.11 Modification of SHABERTH Code to Output Additional Contact Data ................ 32
1.12 SHABERTY Shoulder Run-Qut Model Upate ...................................................... 32
1.13 Improvements to SHABERTH Bearing Code to Support Future LH2 Rig
Testing .................................................................................................................... 32
2.0 Bearing Design Studies .................................................................................................... 34
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2. I Comparsion of HPOTP 45ram Bearing Using 440c SS and Silicon Nitride
Rolling Elements .................................................................................................... 34
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2.2 Further Analysis and Optimization of Rocketdyne 45ram Bearings with
Silicon Nitride Rolling Elements ........................................................................... 36
2.3 Optimization of Additional Parameters for 45ram Rocketdyne Bearing with
Silicon Nitride Bearings .......................................................................................... 44
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2.4 Assessment of Outer Race Tilt Effects on the 45 mm HPTOP Bearing
Operating Characteristics ........................................................................................ 54
H 2.5 Investigation of Ball Pocket Clearances for 45 mm Bearings with Battelle
Cages ...................................................................................................................... 62
2.6 Investigation of Operating Stresses in the Fluoroloy-C Cage Design ..................... 62
2.7 Comparison of Cage Loads for BSMT Testing of Battelle Cages .......................... 68
qL_ 2.8 P&W PEBB Operation with High Axial Preload .................................................. 76
2.9 ATD LOX Pump PEBB Radial Stiffness with Straight and Diverged
Deadband .................. , ............................................................................................ 80
2.10 ATD Pump End Bail Bearing Outer Race Tilt Analysis ........................................ 84
2.11 Static Load Capacity of High Pressure Fuel Pump Ball Bearings .......................... 86
2.12 Contact Geometry Characteristics for the Fuel Pump Ball Bearing ........................ 87
2.13 Hydrostatic Bearing Test Review ........................................................................... 88
2. !4 Fluid Film Bearing Tester Off Design Analysis ..................................................... 89
3.0 Design of Rolling Element Bear|rigs for the Marshall Space Flight Center
Simplex Turbopump Design ................................................................ ................ ;........ ..90
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4.0 Hardware Anomaly Investigation ................................................................................ 103
4.1 Investigation of Spiral Scarring on ATD Pump End Ball Bearing ....................... 103
4.2 ATD Pump End Ball Bearing Analysis Support ................................................. 105
4.3 Investigation of Ball Size Variations Effects in ATD LO 2 Pumps ....................... l I l
4.4 Evaluation of Bearing Stiffness Loss as a Function of Ball Wear for
Rocketdyne SSME Fuel Pump Bearings ............................................................. 112
4.5 Analysis of Rocketdyne HPOTP 2315R3 Pump End Bearings ........................... 113
4.6 Analysis of 85ram LPOTP Bearing Ball Excursions ........................................... 115
4.7 Space Shuttle APU Bearing Torque Investigation ................................................ 116
4.8 ADORE Analysis of HPFTP/AT and HPOTP/AT Contact Traction Forces ....... 117
4.9 ADORE Analysis Supporting FEP Coated Cage Debond Investigation ............. 127
4.10 Stress Analysis for FEP Coated Cage Debond Investigation ............................... 132
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5.0 Bearing Seals and Materials Test Support .................................................................... 90
5.1 Summary of Unit 3 Build 6 Test Series ............................................................... 135
5.2 Radial Loading of BSMT Bearings ...................................................................... 165
5.3 Radial Load Analysis for Si3N4 Ball Bearings in the BSMT ............................... 169
5.4 Unit 2, Build 14 Test of Si3N4 Ball Bearings with Axial and Radial Loads ........ 172
5.5 Testing of BSMT Unit 3 Build 7 .......................................................................... 191
5.6 Unit 3, Build 7 Summary ..................................................................................... 208
6.0 Liquid Hydrogen Bearing Test Rig Support ............................................................... 221
6.1 ALGOR Thermal Analysis of MSFC Hybrid Bearing Test Rig .......................... 222
Ib¢ 6.2 Development of SINDA/SHABERTH/HYDROSEAL Model of MSFC Fluid
Film Bearing Tester .............................................................................................. 223
6.3 Fluid Film Bearing Tester Redline Review ........................................................... 225
6.4 Rolling Element Bearing Tester Test Readiness Review ...................................... 225
6.5 Preparation for Hydrogen Testing of HPFTP/AT Ball Bearing ............................ 226
6.6 Test Support for the MSFC LH2 Bearing Tester .................................................. 227
6.7 Test Support for the MSFC LH2 Bearing - Build 1 ............................................. 232
6.8 Test Support for the MSFC LH2 Bearing Tester Build 2..................................... 237
6.9 Test Support for MSFC LH2 Bearing Tester - Build 3 ........................................ 249
6.10 Test Support for MSFC LH2 Bearing Tester - Build 3A ..................................... 254
6.11 Test Support for MSFC LH2 Bearing Tester - Build 4 ........................................ 263
6.12 Test Support for MSFC LH2 Bearing Tester - Build 5 ........................................ 279
mN 6.13 Mid-term Inspection Results ................................................................................ 290
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LIST OF EXHIBITS
EXHIBIT PAGE
1 Version 1.2 Rolling Element Output Including Spin to Roll Ratios ..................................... 3
2 Version 1.2 Heat Generation Distribution to Contact Ellipse ............................................. 4
3 Maximum Stress Velocity Output for Version 1.2 .............................................................. 5
4 Stress Velocity Profile Output for Version 1.2.................................................................... 6
5 Ball Bearing Ball Excursion Output ..................................................................................... 7
6 Shaft System Modeled with Beam Elements ..................................................................... 10
7 Element Stiffness Matrix .................................................................................................... 11
8 Typical Shaft Bearing System with Applied Loading and Bearing Reactions ................... 13
9 Bearing Thermomechanical Model Flow Diagram Showing Interface to Hydroseal .......... 15
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10 SSME LOX Turbopump Bearing/Shaft Reaction Load Predictions for Prescribed]
Damper Seal Load .............................................................................................................. 16
11 SSME LOX Turbopump Bearing/Shaft Reaction Load Predictions for Prescribedl
Damper Seal Load .............................................................................................................. 17
12 Schematic of Test Apparatus for Pratt & Whitney Preload Spring Moment Test ........... 21
[] 13 Schematic of Preload Spring Depicting Location of Tilting Load Application
Points, Displacements, and Spring Pads ............................................................................ 21
L- 14 P&W Preload Spring Rate Test Results ............................................................................. 22
IRa 15 P&W Preload Spring Rate Test Results ............................................................................. 22
16 Enforced Displacement for Tilt Analysis .......................................................................... 23
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17 Deformed Structure Plots for Spring .................................................................................. 24
18 Changes to SHABERTH Input Resulting from Three Ring Fit Analysis Modification ...26
19 Changes to SHABERTH Output Resulting from Three Ring Fit Analysis Modification 27
20 Fluid Film Bearing Tester Showing Optional Ball and Roller Bearing Installation ............ 28
m 21 Preload Spring Configuration Model Incorporated In SINDA/SHABERTH .................... 28
22 Ring Under a Radial Load and Distribution Shear Forces .................................................. 30
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23 Ring Loading for Case of Applied Reaction Load .............................................................. 31
24 Ring Loading for Case of Distributed Reaction Load ......................................................... 31
25 Deflected Ring Shapes for Two Cases ............................................................................... 31
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26 Comparison of Stress for 440C Sta_aless_teel Balls and Silicon Nitride Balls in
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Rocketdyne HPOTP Pump End 45 mm Beatings ............................................................. 35
= = 27 Comparison of Heat Generation for 440C Stainless Steel Balls and Silicon Nitride
Balls in Rocketdyne HPOTP Pump End 45 mm Bearings ................................................ 35
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28 Comparison of Temperature for 440C Stainless Steel Balls and Silicon Nitride Balls in
Rocketdyne HPOTP Pump End 45 mm Bearings ............................................................. 36
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29"- HPOTP PumpEnd Bearing ReactionLoads_ .................................... _.......... ...................... 37
30 HPOTP Bearing 1 Contact Stress ...................................................................................... 38
31 HPOTP Bearing 2 Contact Stress...i .................................................................................. 39
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32 HPOTP Pump End Bearing Ball Excursion ....................................................................... 40
33 HPOTP Bearing i Frictional Heat Generation ..................... 2....................... i...................... 41
34 HPOTP Bearing 2 Frictional Heat Generation ............. i..................................................... 42
35 Spin/Roll and Gyroscopic Slip ........................................................................................... 43
36 HPOTP Bearing 1 Component Temperature ..................................................................... 44
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LIST OF EXHIBITS (Continued)
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EXHIBIT PAGE
37 HPOTP Bearing 2 Component Temperature ..................................................................... 45
38 Clearances and Curvatures Investigated ............................................................................. 45
39 HPOTP Pump End Bearing Ball Excursion ....................................................................... 46
40 HPOTP Pump End Bearing Radial Load ........................................................................... 46
41 HPOTP Pump End Bearing Axial Load ............................................................................. 47
42 HPOTP Pump End Bearing 2 Contact Stress .................................................................... 47
43 HPOTP Pump End Bearing 1 Contact Stress .................................................................... 48
44 HPOTP Pump End Bearing 1 Frictional Heat Generation ................................................. 49
45 HPOTP Pump End Bearing 2 Frictional Heat Generation ................................................. 50
46 HPOTP Pump End Bearing Ball Temperature .................................................................. 51
47 HPOTP Pump End Bearing Inner Race Temperature ........................................................ 52
48 HPOTP Pump End Bearing Outer Race Temperature ....................................................... 53
49 Bearing Operating Characteristics with Outer Race Tilt to Minimize Reaction
Moments ............................................................................................................................ 54
w 50 HPOTP Pump End Bearing Reaction Loads ...................................................................... 56
51 HPOTP Pump End Bearing Inner Race Contact Stress ..................................................... 57
52 HPOTP Pump End Beating Ball Excursion ....................................................................... 58
u 53 HPOTP Pump End Frictional Heat Generation ................................................................. 59
54 HPOTP Bearing 1 Component Temperatures ................................................................... 60
fi 55 HPOTP Bearing 2 Component Temperatures ................................................................... 61
56 Comparison of 45 mm Pump End Bearings and Bearings Equipped with Battelle
Cages .................................................................................................................................. 62
57 Cage Shroud Deformation at Speed and Chilled ................................................................. 63
58 Nodal Displacement of Cage Shroud in Cylindrical Coordinates ....................................... 64
59 Shroud Model Nodal Locations ......................................................................................... 65
60 Cage Shroud and Insert Dimensions for Fluoroloy-C Cage ............................................... 66
61 Idealized Model to Calculate Stresses Due to Bend-Over Tab Constraint ........................ 67
62 Comparison of Cage Guide Land Loads Versus Beating Rotation and Cage Orbits for
45mm Bearing in Pump to 57mm Being in BSMT (Battelle Cages) ............................... 70
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63 Comparison of Cage Pocket Loads for 45 mm Bearing in Pump to 57 mm Beating in
BSMT (Battelle Cages) ...................................................................................................... 71
64 Comparison of Reaction Loads for HPOTP 45mm Bearings ............................................ 73
65 Comparison of Inner Race Contact Stress for HPOTP 45mm Bearings ............................ 73
66 Comparison of Inner Race Heat Generation for HPOTP 45mm Bearings ......................... 74
-. 67 Comparison-of Outer Race Heat Generation for HPOTP 45mm Bearings ........................ 74
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68 Bearing 2 Temperature for HPOTP Pump End Bearings .................................................. 75
• 69 Bearing 1 Temperature for HPOTP Pump End Bearings .................................................. 75
70 Comparison of Ball Excursion for HPOTP 45 mm Bearings ............................................. 76
71 BSMT Outboard Bearing Ball Excursion .......................... _................................................ 76
E 72 BSMT Reaction Loads for Outboard Bearings .................................................................. 77
W 73 BSMT Outboard Bearing Inner Race Contact Stress ......................................................... 77
74 BSMT Outboard Bearing Contact Frictional Heat ............................................................ 78
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LIST OF EXHIBITS (Continued)
EXHIBIT PAGE
75 BSMT Outboard Bearing Component Temperatures ........................................................ 78
76 PEBB Average Component Temperatures for Steady-State Operation with
Increased Preload ................................................................................................................ 79
77 Coolant Temperature Rise Across PEBB Operating With Increased Payload .................. 80
78 PEBB Internal Clearance Operating with Increased Payload ............................................. 80
79 PEBB Radial Stiffness with Increased Preioad Calculated Using Secant Methods ........... 81
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80 Tilting Moments Reacting on PEBB Outer Race ............................................................... 82
81 ATD LOX PEBB Reaction Moments on Outer Race ....................................................... 83
82 ATD LOX Pump PEBB Reaction Moments on Outer Race ............................................ 83
83 ATD LOX Pump PEBB Reaction Moments on Outer Race ............................................ 84
84 ATD LOX Pump PEBB Radial Deflection of Inner Race with Respect to Outer Race ...84
k 85 ATD LOX Pump PEBB Radial Stiffness of Beating Using Secant Method ..................... 85
86 Configuration Description of Bearing Outer Race Tilt ...................................................... 86
87 Outer Race Tilt Versus Housing Taper .............................................................................. 86
88 PEBB Ball Excursion .......................................................................................................... 86
89 Static Load Capacity .......................................................................................................... 87
9O Ball to Race Parameters ...................................................................................................... 88
W 91 Inner Race Contact Geometry ............................................................................................ 88
92 Compressive Stress Distribution in the Contact ................................................................ 89
93 H2 Slave Beating Stiffness Variation .................................................................................. 89
J 94 Simplex LO2 Turbopump Cross Section ........................................................................... 90
95 Simplex Pump Bearing Radial Reaction Loads ................................................................... 91
96 Simplex Pump Bearing 1Race Contact Stress
(45mm Phase II Bearing with Si3N4 Balls) ........................................................................ 91
97 Simplex Pump Bearing 1 Race Heat Generation
(45mm Phase II Bearing with Si3N4 Balls) ........................................................................ 92
98 Simplex Pump Bearing 1 Component Temperatures
(45mm Phase II Bearing with Si3N4 Balls) ........................................................................ 92
99 Simplex Pump Bearing 1 Ball Excursi0n
(45mm Phase II Bearing with Si3N4 Balls) ........................................................................ 93
100 Simplex Pump Bearing 1Radial Deflection
(45mm Phase II Bearing with Si3N4 Bails). ....................................................................... 93
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101 Simplex Pump Bearing 2 Radial Deflection
(45mm Phase II Bearing with Si3N4 Balls) ............................................. :..]................... ....94
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102 Simplex Bearing 2Radial Deflectiori wi-th 60-0 Lb Preload -
(45mm Phase II Bearing with Si3N4 Balls) ............... ................ :............ ....; ............... :.:.:...94
=.=. 103 Simplex Bearing 1 Radial Deflection ............................................... ;....................... ;........... 95
104 Simplex Bearing 1 Shaft Deflections Versus Load_ ............ i......... ...................................... 96
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105 Simplex Pump 45ram Pump End Bearing Race Curvatures.i ..... ........... _............ ............ _...96
106 Simplex Pump 45ram Pump End Beating Clearance .......................................................... 97
107 Simplex Pump 45mm Pump End Bearing Contact Stress .................................................. 97
108 Simplex Pump 45mm Pump End Beating SV ..................................................................... 98
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LIST OF EXHIBITS (Continued)
EXHIBIT PAGE
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109 Simplex Pump 45mm Pump End Bearing Spin-to-Roll Ratio ............................................ 98
110 Simplex Pump 45mm Pump End Bearing Ball Excustion .................................................. 99
111 Simplex Pump 45mm Pump End Bearing Heat Generation ............................................... 99
112 Simplex Pump 45ram Pump End Bearing Temperature ................................................... 100
113 Simplex Bearing 1 Stress and Heat Compared to Other LO2 Bearings ............................ 100
114 Comparison of Simplex Bearing 1to Other LO2 Bearings Applications ........................ 101
115 Simplex Preload at Different Beating Conditions ............................................................. 101
116 Spin Vector Orientation for ATD PumpEnd Bearing with 2,000 lbs Axial Load
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and 0 Radial Load ............................................................................................................. 103
117 Spin Vector Orientation for ATD Pump End Bearing with 20,000 Ibs Axial Load and
0 Radial Load .................................................................................................................... 104
118 Spin Vector Orientation for ATD Pump End Bearing with 200,000 Ibs Axial Load and
0 Radial Load ............................................................................ ........................................ 104
119 Spin Vector Orientation for ATD Pump End Bearing with 100 lbs Axial Load and
1,000 lbs Radial Load (Heaviest Load Ball) ..................................................................... 105
120 Spin Vector Orientation for ATD Pump End Bearing with 100 Ibs Axial Load and
1,000 Ibs Radial Load (Ball Unloaded on Inner Race) ...................................................... 105
121 ATD PEBB Ball Excursion .............................................................................................. 106
122 ATD PEBB Coolant Temperature Rise Versus Axial Load and Friction ........................ 106
123 ATD PEBB Radial Load Versus Coolant Temperature Rise ........................................... 107
124 ATD PEBB Contact Friction Heat Versus Axial Load and Friction ............................... 107
W 125 ATD PEBB Maximum Track Temperature Versus Axial Load and Friction .................. 108
126 Total Ball to Cage Heat Generation ................................................................................. 108
127 Total Cage to Race Heat Generation .....,,i........................................................................ 109
128 Total Cage Heat Generation ............................................................................................. 109
129 Effect of Cage Instability on Heat Generation and Cage Wear ........................................ 110
130 Effect of Cage Instability on Cage Motion ...................................................................... 110
131 Affect of Ball Size Variation on Total Bearing Heat Generation ..................................... 111
132 Time Averaged Wear Rates for Radial Loaded PEBB with One Oversized Ball; ............ 111
133 Inner Race Heat Generation with Oversized Ball under Radial Load .............................. 112
134 Outer Race Heat Generation with Oversized Ball under Radial Load ............................. 112
135 RKD HPFTP Bearing Secant Stiffness ........................................................................... 113
136 RKD HPFTP Bearing Radial Deflection .......................................................................... 113
137 KD HPFTP Bearing Secant Stiffness (Zero Moment) ................................................... 114
138 RKD HPFTP Bearing Radiai Deflection (Zero Moment) 114
139 Comparison of HPOTP 2315R3 Pump End Bearings(.: ........... _,.......... ;:...... ,...._....:.... ....115
140 Space Shuttle Auxiliary Power Unit .................. ................................................. ..., ........ 117
141 Torque By APU Turbine End Bearing at 72,000 RPM ...................... ...... ....................... 117
142a HPOTP/AT 1100 Ibs Axial Load 375 lbs Radial Load Heaviest Loaded Ball,
Outer Racel .......... i......... 21.................... ._................. 2.................... :...... _,......... ................ 119
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142b HPOTP/AT 1100 lbs Axial Load 375 lbs Radial Load Heaviest Loaded Ball,
Iw Inner Race ......................................................................................................................... 119
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LIST OF EXHIBITS (Continued)
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142c HPOTP/AT 1100 lbs Axial Load 375 lbs Radial Load Lightest Loaded Ball,
Outer Race ........................................................................................................................ 120
142d HPOTP/AT 1100 lbs Axial Load 375 lbs Radial Load Lightest Loaded Ball,
Inner Race ......................................................................................................................... 120
142e HPFTP/AT 875 lbs Axial Load 125 lbs Radial Load Heaviest Loaded Ball,
Outer Race ........................................................................................................................ 121
142f HPFTP/AT 875 lbs Axial Load 125 lbs Radial Load Heaviest Loaded Ball,
Inner Race ......................................................................................................................... 121
142g HPFTP/AT 850 Ibs Axial Load 125 lbs Radial Load Lightest Loaded Bail,
Outer Race ........................................................................................................................ 122
142h HPFTP/AT 850 Ibs Axial Load 125 lbs Radial Load Lightest Loaded Ball,
Inner Race ......................................................................................................................... 122
142i HPFTP/AT 950 lbs Axial Load 125 lbs Radial Load Heaviest Loaded Ball,
Outer Race ........................................................................................................................ 123
14_ HPFTP/AT 950 lbs Axial Load 125 lbs Radial Load Heaviest Loaded Ball,
Inner Race ......................................................................................................................... 123
i42k HPFTP/AT 950 lbs Axial Load 125 lbs Radial Load Lightest Loaded Ball,
W Outer Race ................................................. ....................................................................... 124
1421 HPFTP/AT 950 Ibs Axial Load 125 lbs Radial Load Lightest Loaded Ball,
Inner Race ......................................................................................................................... i24
i42m HPFTP/AT 950 lbs Axial Load 2000 lbs Radial Load Heaviest Loaded Ball,
Outer Race ........................................................................................................................ 125
142n HPFTP/AT 950 lbs Axial Load 2000 lbs Radial Load Heaviest Loaded Ball,
Inner Race ......................................................................................................................... 125
142o HPFTP/AT 950 lbs Axial Load 2000 lbs Radial Load Lightest Loaded Ball,
Outer Race ........................................................................................................................ i26
142p HPFTP/AT 950 lbs Axial Load 2000 lbs Radial Load Lightest Loaded Ball,
Inner Race ........................................................................................................................ 126
143 Predicted Cage Loads for SSME LPFTP ......................................................................... 128
U I44 Predicted Cage Loads for SSME LPFTP ......................................................................... 129
145 Predicted Cage Loads for SSME LPFTP ......................................................................... 130
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146 Predicted Cage Loads for SSME LPFTP ......................................................................... 131
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147 Typical LPFTP Ball Excursion Loads ............................................................................. 132
148 LPFTP pump End Bearing Estimated Cage Stress Based on ADORE Model
-5 Cage and Liu Moment Solution ..... ,...... .., ....... ;................................... .......... ........ _.......... 133
149
BSMT Test Conditions and Selected Data (Test 3060202) ........................................ ,.. 136
150 BSMT Test Parameter Comparison LOX Tests (Test 3060202) ................................... 137
g 151 Temperature Profile for Test 3060202 .'.. ....................................................................... 138
152 Pressure Profile for BSMT Test 3060202 ................................... .................................... 138
153 BSMT Test Conditions and Selected Data (Test 3060301) ........ ................................... 139
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154 BSMT Test Parameter Comparison LOX Tests (Test 3060301) ................................... 140
155 Temperature Profile Test 3060301 .................................................................................. 141
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LIST OF EXHIBITS (Continued)
EXHIBIT PAGE
156 Pressure Profile for BSMT Test 3060301 ....................................................................... 141
157 Comparison of 45mm Pump End Bearings and Bearing Equipped with Battelle Cages.. 142
158 Bearing Outer Race Temperatures (T100-) for BSMT Test 3060402 ............................ 143
159 Bearing Outer Race Temperatures (TA100-) for BSMT Test 3060402 ......................... 143
160 BSMT Test Conditions and Selected Data (Test 3060402) ........................................... 144
161 BSMT Test Parameter Comparison LOX Tests (Test 3060402) ................................... 145
162 Temperature Profile Test 3060402 (Test Speed 26,000 RPM) ...................................... 146
163 Temperature Profile Test 3060402 (Test Speed 28,000 RPM) ...................................... 146
164 Temperature Profile Test 3060402 (Test Speed 30,000 RPM') ...................................... 147
165 Pressure Profile for BSMT Test 3060402 (Test Speed 26,000 RPM) ........................... 147
166 Pressure Profile for BSMT Test 3060402 (Test Speed 28,000 RPM) ........................... 148
167 Pressure Profile for BSMT Test 3060402 (Test Speed 30,000 RPM) ........................... 148
168 BSMT Test Conditions and Selected Data (Test 3060501) ........................................... 149
169 BSMT Test Parameter Comparison LOX Tests (Te st 3060501) ................................... 150
v__ o 170 Temperature Profile for Test 3060501 ....................................................................... 151
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171 Pressure Profile for BSMT Test 3060501 ....................................................................... 151
_=._._ 172 Bearing Outer Race Temperatures (Test 3060601) ......................................................... 152
173 BSMT Test Conditions and Selected Data (Test 3060601) ........................................... 153
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174 BSMT Test Parameter Comparison LOX Tests (Test 3060601) .................................. 154
175 Temperature Profile for BSMT Test 3060601 ................................................................ 155
176 Pressure Profile for BSMT Test 3060601 ....................................................................... 155
177 BSMT Test Conditions and Selected Data (Test 3060701) ........................................... 156
178 BSMT Test Parameter Comparison LOX Tests (Test 3060701) .................................. 157
179 Temperature Profile for BSMT Test 3060701 .............................................................. 158
180 Pressure Profile for BSMT Test 3060701 ............................................................. 158
181 BSMT Test Conditions and Selected Data (Test 3060801) ........................................... 159
182 BSMT Test Parameter Comparison LOX Tests (Test 3060801) ................................. 160
183 Temperature Profile for BSMT Test 3060801 ....................................................... 161
184 Pressure Profile for BSMT Test 3060801 ...................................................................... 161
185 BSMT Test Conditions and Selected Data (Test 3060901) ........................................... 162
186 BSMT Test Parameter Comparison LOX Tests (Test 3060901) ................................... 163
187 Temperature Profile for BSMT Test 3060901 ................................................................ 164
w 188 Pressure Profile for BSMT Test 3060901 ...................................................................... 164
189 Bearing Reaction Versus Carrier Load ............................................................................... 165
190 BSMT Axial Bearing Stiffness ................................................... i................................... 166
-m-- 191 BSMT Beating Operating Characteristics Under Radial and Axial Loads ....................... 166
192 Bearing Reaction Versus Carrier Loads .......................................................................... 167
m1-____ 193 Bearing Reaction Versus Carrier ('PA) Load. ....... ............................................................ 168
194 Bearing Reaction Versus Carrier (PA) Load. .................................................................. ..168
195 Bearing Reaction Versus Initial Preload with a PA Load of 2,000 lbs............................. 169
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196 Spring Gap Versus Initial Preload .................................................................................... 169
197 Bearing Axial Load Deflection. ......................................................................................... 169
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