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Evaluation Of Axial Lock Up Of Space Shuttle Main Engine Bearings From High Pressure Oxygen Turbopump
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781724307538 Total Pages :32 pages Book Rating :4.3/5 (75 download)
Book Synopsis Evaluation of Axial Lock-Up of Space Shuttle Main Engine Bearings from High Pressure Oxygen Turbopump by : National Aeronautics and Space Administration (NASA)
Download or read book Evaluation of Axial Lock-Up of Space Shuttle Main Engine Bearings from High Pressure Oxygen Turbopump written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-26 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mainshaft support bearings of long life turbopumps for use on the space shuttle were evaluated to determine possible causes of failure. Specific aspects examined include the sensitivity of 15 degree versus 25 degree contact angle bearings with regard to heat damage and thermal runaway, the L/D aspects of the turbine end bearing pair with regard to hang-up due to cocking, the hang-up required to support a 44.5 KN axial load without cartridge slipping, the outer race growth as a result of a 44.5 KN axial load, and bearing torque as a function of axial load. Results indicate that hang-up of the cartridge due to bearing heating is a serious problem especially if poor lubrication of the bearing occurs and that race growth due to axial load can contribute to cartridge lock-up. The experimental evaluation of bearing performance under axial loads indicates that the bearing torque is a strong function of surface lubrication. Kannel, J. W. and Dufrane, K. F. Unspecified Center NASA-CR-161613 NAS8-33576
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725068889 Total Pages :32 pages Book Rating :4.0/5 (688 download)
Book Synopsis Evaluation of Space Shuttle Main Engine Bearings from High Pressure Oxygen Turbopump 9008 by : National Aeronautics and Space Administration (NASA)
Download or read book Evaluation of Space Shuttle Main Engine Bearings from High Pressure Oxygen Turbopump 9008 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-13 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two used turbopump mainshaft support bearings were examined to determine steps needed to achieve turbopump lifetimes of 27,000 seconds. The two bearings, which had been run in a high pressure oxygen turbopump, are angular contact ball bearings, applied as a preloaded pair, locked to the shaft, inner race rotating, with the outer races unrestrained axially. Examination showed that both bearings had been subjected to overloads, leading to fatigue spalling on the races and balls and advanced retainer wear. This is clear evidence of unintended high internal loads in the high pressure oxygen pump which would lead to complete bearing failure and extensive secondary pump damage. Action must be taken to reduce the applied bearing loads or to incorporate bearings of sufficient size to withstand the high loads. Dufrane, K. F. and Kannel, J. W. Unspecified Center NASA-CR-161516 NAS8-33576...
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1981 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Developmental Problems and Their Solution for the Space Shuttle Main Engine Alternate Liquid Oxygen High-pressure Turbopump: Anomaly Or Failure Investigation the Key by : R. S. Ryan
Download or read book Developmental Problems and Their Solution for the Space Shuttle Main Engine Alternate Liquid Oxygen High-pressure Turbopump: Anomaly Or Failure Investigation the Key written by R. S. Ryan and published by . This book was released on 1995 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722755027 Total Pages :86 pages Book Rating :4.7/5 (55 download)
Book Synopsis Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 2 by : National Aeronautics and Space Administration (NASA)
Download or read book Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 2 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high-pressure oxidizer turbopump (HPOTP) consists of two centrifugal pumps, on a common shaft, that are directly driven by a hot-gas turbine. Pump shaft axial thrust is balanced in that the double-entry main inducer/impeller is inherently balanced and the thrusts of the preburner pump and turbine are nearly equal but opposite. Residual shaft thrust is controlled by a self-compensating, non-rubbing, balance piston. Shaft hang-up must be avoided if the balance piston is to perform properly. One potential cause of shaft hang-up is contact between the Phase 2 bearing support and axial spring cartridge of the HPOTP main pump housing. The status of the bearing support/axial spring cartridge interface is investigated under current loading conditions. An ANSYS version 4.3, three-dimensional, finite element model was generated on Lockheed's VAX 11/785 computer. A nonlinear thermal analysis was then executed on the Marshall Space Flight Center Engineering Analysis Data System (EADS). These thermal results were then applied along with the interference fit and bolt preloads to the model as load conditions for a static analysis to determine the gap status of the bearing support/axial spring cartridge interface. For possible further analysis of the local regions of HPOTP main pump housing assembly, detailed ANSYS submodels were generated using I-DEAS Geomod and Supertab (Appendix A). Sisk, Gregory A. Unspecified Center...
Book Synopsis Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 2 by : National Aeronautics and Space Adm Nasa
Download or read book Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 2 written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-09 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high-pressure oxidizer turbopump (HPOTP) consists of two centrifugal pumps, on a common shaft, that are directly driven by a hot-gas turbine. Pump shaft axial thrust is balanced in that the double-entry main inducer/impeller is inherently balanced and the thrusts of the preburner pump and turbine are nearly equal but opposite. Residual shaft thrust is controlled by a self-compensating, non-rubbing, balance piston. Shaft hang-up must be avoided if the balance piston is to perform properly. One potential cause of shaft hang-up is contact between the Phase 2 bearing support and axial spring cartridge of the HPOTP main pump housing. The status of the bearing support/axial spring cartridge interface is investigated under current loading conditions. An ANSYS version 4.3, three-dimensional, finite element model was generated on Lockheed's VAX 11/785 computer. A nonlinear thermal analysis was then executed on the Marshall Space Flight Center Engineering Analysis Data System (EADS). These thermal results were then applied along with the interference fit and bolt preloads to the model as load conditions for a static analysis to determine the gap status of the bearing support/axial spring cartridge interface. For possible further analysis of the local regions of HPOTP main pump housing assembly, detailed ANSYS submodels were generated using I-DEAS Geomod and Supertab (Appendix A). Sisk, Gregory A. Unspecified Center...
Book Synopsis Space shuttle main engine high pressure oxidizer turbopump critical speed and unbalance response analysis by : Dennis Fuk-Kuen Li
Download or read book Space shuttle main engine high pressure oxidizer turbopump critical speed and unbalance response analysis written by Dennis Fuk-Kuen Li and published by . This book was released on 1978 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Space Shuttle Main Engine Structural Analysis and Data Reduction/evaluation by : Gregory A. Sisk
Download or read book Space Shuttle Main Engine Structural Analysis and Data Reduction/evaluation written by Gregory A. Sisk and published by . This book was released on 1989 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental data analysis of the space shuttle main engine - high pressure oxidizer and fuel turbopumps by : Edgar J. Gunter
Download or read book Experimental data analysis of the space shuttle main engine - high pressure oxidizer and fuel turbopumps written by Edgar J. Gunter and published by . This book was released on 1979 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722788650 Total Pages :42 pages Book Rating :4.7/5 (886 download)
Book Synopsis Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 3b by : National Aeronautics and Space Administration (NASA)
Download or read book Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 3b written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-11 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis performed on the High Pressure Oxidizer Turbopump (HPOTP) preburner pump bearing assembly located on the Space Shuttle Main Engine (SSME) is summarized. An ANSYS finite element model for the inlet assembly was built and executed. Thermal and static analyses were performed. Power, Gloria B. and Violett, Rebeca S. Unspecified Center NAS8-37282...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723020780 Total Pages :118 pages Book Rating :4.0/5 (27 download)
Book Synopsis Detailed Study of Oxidation/Wear Mechanism in Lox Turbopump Bearings by : National Aeronautics and Space Administration (NASA)
Download or read book Detailed Study of Oxidation/Wear Mechanism in Lox Turbopump Bearings written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wear of 440C angular contact ball bearings of the phase 2 high pressure oxygen turbopump (HPOTP) of the space shuttle main engine (SSME) has been studied by means of various advanced nondestructive techniques (NDT) and modeled with reference to all known material, design, and operation variables. Three modes dominating the wear scenario were found to be the adhesive/sheer peeling (ASP), oxidation, and abrasion. Bearing wear was modeled in terms of the three modes. Lacking a comprehensive theory of rolling contact wear to date, each mode is modeled after well-established theories of sliding wear, while sliding velocity and distance are related to microsliding in ball-to-ring contacts. Microsliding, stress, temperature, and other contact variables are evaluated with analytical software packages of SHABERTH(TM)/SINDA(TM) and ADORE(TM). Empirical constants for the models are derived from NIST experiments by applying the models to the NIST wear data. The bearing wear model so established precisely predicts quite well the average ball wear rate for the HPOTP bearings. The wear rate has been statistically determined for the entire population of flight and development bearings based on Rocketdyne records to date. Numerous illustrations are given. Chase, T. J. and Mccarty, J. P. Marshall Space Flight Center BALL BEARINGS; CRYOGENIC EQUIPMENT; HIGH PRESSURE OXYGEN; LIQUID OXYGEN; SLIDING FRICTION; SPACE SHUTTLE MAIN ENGINE; TURBINE PUMPS; WEAR; ABRASION; APPLICATIONS PROGRAMS (COMPUTERS); OXIDATION; PEELING...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722355524 Total Pages :82 pages Book Rating :4.3/5 (555 download)
Book Synopsis Developmental Problems and Their Solution for the Space Shuttle Main Engine Alternate Liquid Oxygen High-Pressure Turbopump by : National Aeronautics and Space Administration (NASA)
Download or read book Developmental Problems and Their Solution for the Space Shuttle Main Engine Alternate Liquid Oxygen High-Pressure Turbopump written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Space Shuttle main engine (SSME) alternate high-pressure liquid oxygen pump experienced synchronous vibration and ball bearing life problems that were program threatening. The success of the program hinged on the ability to solve these development problems. The design and solutions to these problems are engirded in the lessons learned and experiences from prior programs, technology programs, and the ability to properly conduct failure or anomaly investigations. The failure investigation determines the problem cause and is the basis for recommending design solutions. For a complex problem, a comprehensive solution requires that formal investigation procedures be used, including fault trees, resolution logic, and action items worked through a concurrent engineering-multidiscipline team. The normal tendency to use an intuitive, cut-and-try approach will usually prove to be costly, both in money and time and will reach a less than optimum, poorly understood answer. The SSME alternate high-pressure oxidizer turbopump development has had two complex problems critical to program success: (1) high synchronous vibrations and (2) excessive ball bearing wear. This paper will use these two problems as examples of this formal failure investigation approach. The results of the team's investigation provides insight into the complexity of the turbomachinery technical discipline interacting/sensitivities and the fine balance of competing investigations required to solve problems and guarantee program success. It is very important to the solution process that maximum use be made of the resources that both the contractor and Government can bring to the problem in a supporting and noncompeting way. There is no place for the not-invented-here attitude. The resources include, but are not limited to: (1) specially skilled professionals; (2) supporting technologies; (3) computational codes and capabilities; and (4) test and manufacturing facilities. Ryan, R. and Gross, L. A. Marshall S...
Book Synopsis Space Shuttle Main Engine Structural Analysis and Data Reduction/evaluation by : Gloria B. Power
Download or read book Space Shuttle Main Engine Structural Analysis and Data Reduction/evaluation written by Gloria B. Power and published by . This book was released on 1989 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722788896 Total Pages :42 pages Book Rating :4.7/5 (888 download)
Book Synopsis Space Shuttle Main Engine Turbopump Bearing Assessment Program by : National Aeronautics and Space Administration (NASA)
Download or read book Space Shuttle Main Engine Turbopump Bearing Assessment Program written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-11 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the work done on the bearing assessment program over the past two and a half years. The objective of the program is to develop a nondestructive evaluation system for the SSME HPOTP's which would be used to detect anomalies in installed bearings without engine disassembly. Data bases of various signatures are obtained by slowly turning the pump shafts before and after an engine firing. These signatures are then analyzed and compared to the original signatures to more accurately predict bearing wear. Breithaupt, B. Spiegel Marshall Space Flight Center ...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722755201 Total Pages :54 pages Book Rating :4.7/5 (552 download)
Book Synopsis Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 3a by : National Aeronautics and Space Administration (NASA)
Download or read book Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 3a written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The model generation and structural analysis performed for the High Pressure Oxidizer Turbopump (HPOTP) preburner pump volute housing located on the main pump end of the HPOTP in the space shuttle main engine are summarized. An ANSYS finite element model of the volute housing was built and executed. A static structural analysis was performed on the Engineering Analysis and Data System (EADS) Cray-XMP supercomputer Shannon, Robert V., Jr. Unspecified Center...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722755317 Total Pages :100 pages Book Rating :4.7/5 (553 download)
Book Synopsis Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 4 by : National Aeronautics and Space Administration (NASA)
Download or read book Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 4 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis performed on the Space Shuttle Main Engine (SSME) High Pressure Fuel Turbopump (HPFTP) inlet housings is summarized. Three DIAL finite element models were build to aid in assessing the structural life of the welds and fillets at the vanes. Complete results are given. Pool, Kirby V. Unspecified Center...
Book Synopsis Space Shuttle Main Engine Turbopump Bearing Assessment Program by :
Download or read book Space Shuttle Main Engine Turbopump Bearing Assessment Program written by and published by . This book was released on 1994 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
