Item Details

Improved Circumferential Shaft Seal for Aircraft Gear Transmissions

by Lawrence P. Ludwig and Thomas N. Strom
Format
Book; Government Document; Online; EBook
Published
Washington, D.C. : National Aeronautics and Space Administration ; [Springfield, Va. : For sale by the National Technical Information Service], 1973.
Language
English
Series
NASA Technical Note
Summary
Operation under simulated aircraft transmission conditions of speeds to 2850 m/min (9350 ft/min), lubricant temperatures to 394 K (250 F), shaft radial runouts to 0.254 mm (0.010 in.) F.I.R. (full indicator reading), and pressure differentials to 1.03 N/cm2 (1.5 psi) revealed that conventional circumferential seals leaked excessively. Modifying the conventional seal by adding helical grooves to the seal bore reduced leakage rates to within the acceptable level of 10 cm3/hr. The leakage rate of this modified seal was not significantly affected by lubricant flooding or by shaft radial runout.
Description
12 p. : ill. ; 27 cm.
Mode of access: Internet.
Notes
  • Prepared at Lewis Research Center.
  • Cover title.
Series Statement
NASA technical note ; NASA TN D-7130
Logo for No Copyright - United StatesNo Copyright - United States
Technical Details

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    a| Ludwig, Lawrence P.
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    a| Improved circumferential shaft seal for aircraft gear transmissions c| by Lawrence P. Ludwig and Thomas N. Strom.
    260
      
      
    a| Washington, D.C. : b| National Aeronautics and Space Administration ; a| [Springfield, Va. : b| For sale by the National Technical Information Service], c| 1973.
    300
      
      
    a| 12 p. : b| ill. ; c| 27 cm.
    490
    0
      
    a| NASA technical note ; v| NASA TN D-7130
    500
      
      
    a| Prepared at Lewis Research Center.
    500
      
      
    a| Cover title.
    520
      
      
    a| Operation under simulated aircraft transmission conditions of speeds to 2850 m/min (9350 ft/min), lubricant temperatures to 394 K (250 F), shaft radial runouts to 0.254 mm (0.010 in.) F.I.R. (full indicator reading), and pressure differentials to 1.03 N/cm2 (1.5 psi) revealed that conventional circumferential seals leaked excessively. Modifying the conventional seal by adding helical grooves to the seal bore reduced leakage rates to within the acceptable level of 10 cm3/hr. The leakage rate of this modified seal was not significantly affected by lubricant flooding or by shaft radial runout.
    538
      
      
    a| Mode of access: Internet.
    650
      
    0
    a| Airplanes.
    650
      
    0
    a| Rings.
    650
      
    0
    a| Sealing (Technology)
    650
      
    0
    a| Transmission devices.
    700
    1
      
    a| Strom, Thomas N.
    710
    1
      
    a| United States. b| National Aeronautics and Space Administration.
    710
    2
      
    a| Lewis Research Center.
    974
      
      
    b| UIU c| UIUC d| 20141113 s| google u| uiug.30112106885095 y| 1973 r| pd q| bib

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