Title:
摺動装置およびこれを用いたモータ
Document Type and Number:
Japanese Patent JP4544951
Kind Code:
B2
Abstract:
The present invention provides sliding members respectively having sliding surfaces opposed to each other for creating dynamic pressure in a fluid, in which the sliding surfaces are formed of ceramics containing crystal grains of Al2O3, crystal grains of TiC contained in the crystal grains of Al2O3, and crystal grains of TiC existing independently of the crystal grains of Al2O3, and having a TiC content of 5 to 20 mass % in the total amount of Al2O3 and TiC, and the respective volume resistivity values R1 and R2 of the ceramics forming the sliding surfaces are within a range simultaneously satisfying equations (1) to (3) to prevent spark discharges from being induced between the sliding surfaces, and a fluid dynamic pressure bearing and a motor to which the configuration is applied: 106 Omega.cm1<=1012 Omega.cm (1) 106 Omega.cm2<=1012 Omega.cm (2) |R1-R2|<=105 Omega.cm (3)
Inventors:
Jun Uda
Kazuhide Kusano
Shunji Migaki
Kazuhide Kusano
Shunji Migaki
Application Number:
JP2004281698A
Publication Date:
September 15, 2010
Filing Date:
September 28, 2004
Export Citation:
Assignee:
Kyocera Corporation
International Classes:
F16C33/12; C04B35/10; C04B35/117; C04B35/56; F16C17/02; F16C17/04; F16C33/74; H02K7/08
Domestic Patent References:
| JP2000329141A | ||||
| JP5194022A | ||||
| JP8121471A |