| 摘要 |
<p>555,519. Lubricants. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. March 11, 1942, No. 3225. Convention date, March 4, 1941. [Class 91] [Also in Group XXXIV] The bearing surfaces of a bearing assembly, particularly for use in a high vacuum, carry a lubricant consisting soley of one or more of the metallic compounds from the group consisting of molybdenum sulphide, molybdenum telluride, molybdenum selenide, tungsten sulphide and tungsten telluride. The lubricant may be contained within a housing constituted by ball or roller bearings positioned within complementary races, such an assembly being used in particular for the rotor of a rotating anode X-ray tube. In the form shown, the rotor 20 of the anode 14 is supported upon a stationary shaft 22 which is attached to the tube support 24 forming the seal of the glass envelope 12, and is caused to rotate thereupon by means of a stator 30, the bearing mountings for the rotor comprising ball or roller assemblies 32 as described. Retaining seals 40 may be provided to retain a supply of the lubricant within the bearings. The lubricant is unimpaired by heating the tube to about 700‹ C. while evacuating so as to degas the metal. In a modified form of ball bearing in which the balls 38 are surrounded by a cage comprising symmetrical halves 50, Fig. 2, having spherical recesses 51 for the balls, cavities 54 are provided within each of the cage halves for containing the lubricant 56.</p> |
