摘要:
A full complement antifriction bearing includes an inner race, an outer race, and rolling elements organized in a circular row between the races without a cage or retainer for separating the rolling elements. While the absence of a cage or retainers enable the bearing to have the maximum number of rolling elements and thus transfer greater loads, adjacent rolling elements contact each other. Each rolling element or every other rolling element is covered with a tribological coating that retards adhesive wear and reduces friction.
摘要:
A method of coating spherical components with a coating process in which the spherical components have a surface area includes positioning the spherical components within a containment boundary on a moving member and positioning the moving member within a chamber. The method includes reducing the pressure within the chamber to less than one atmosphere. The method also includes revolving the moving member about a longitudinal axis. The method further includes oscillating the moving member in a direction of the longitudinal axis and commencing the coating process. The oscillating and revolving produce motion of the spherical components within the containment boundary such that an entirety of the surface area of each component is exposed to the coating process.
摘要:
A method of enhancing the operating life of roller bearings assemblies (B) subject to oil-out conditions is disclosed. The method comprises applying a tribological metal carbide reinforced amorphous hydrocarbon coating layer (16) over either the sliding surfaces (SS) or the rolling surfaces (RS) of the bearing assembly rolling elements (RE), but is preferably applied at least to the sliding surfaces of the rolling element. The coating has a thickness determined according to the equation: Formula (I), where d=coating thickness P=is the ratio of force applied to the rollers/contact area; n=the number of rollers; (t−t0)=the desired operating time after oil-out condition starts; and K′ is the Archard constant. d K ′ = Pv n ( t - t 0 ) , ( 1 )
摘要翻译:公开了一种提高滚轴轴承组件(B)的运行寿命的方法。 该方法包括在轴承组件滚动元件(RE)的滑动表面(SS)或滚动表面(RS)上方施加摩擦学金属碳化物增强的无定形烃涂层(16),但优选至少应用于滑动 滚动体的表面。 涂层具有根据以下等式确定的厚度:式(I)其中d =涂层厚度P =是施加到辊/接触面积的力的比率; n =滚子数; (t-t0)=出油条件开始后的期望运行时间; 并且K'是Archard常数。 d K'= Pv n(t-t 0),(1)
摘要:
A thermally stable tribological coating is applied to the outer surface of a moveable bearing outer ring in a bearing assembly for an x-ray tube rotating anode and/or the surface of a housing bore of the X-ray tube rotating anode which receives the bearing assembly. If the tribological coating is applied to the outer surface of the bearing outer ring, it is made of a material that is metallurgically incompatible with the material from which the housing containing the bearing is made. The coating includes one or more of the following: Cr, W, Mo, or Nb, or nitrides, carbides, oxides, or sulfides of Cr, W, Mo, or Nb.
摘要:
A method of coating an alloy substrate includes providing an alloy substrate that includes less than 0.3 wt. % of diffusible elements; introducing one or more diffusible elements into the alloy substrate to thereby form a diffusible-element-containing alloy substrate; and introducing the diffusible-element-containing alloy substrate to a material reactive with the one or more diffusible elements.
摘要:
A thermally stable tribological coating is applied to the outer surface of a moveable bearing outer ring in a bearing assembly for an x-ray tube rotating anode and/or the surface of a housing bore of the X-ray tube rotating anode which receives the bearing assembly. If the tribological coating is applied to the outer surface of the bearing outer ring, it is made of a material that is metallurgically incompatible with the material from which the housing containing the bearing is made. The coating includes one or more of the following: Cr, W, Mo, or Nb, or nitrides, carbides, oxides, or sulfides of Cr, W, Mo, or Nb.
摘要:
A protective coating is applied to an inner or an outer member of a rotary fluid bearing by sputtering to minimize scuffing, wear and premature failure of the members during starts and stops of the bearing. The coating may include titanium, tungsten, chromium, amorphous carbon with or without metallic impurities, and hydrogenated amorphous carbon with or without metallic impurities. One of the members is formed in two sections to accommodate assembly of the bearing and these sections abut at end faces. Features on each end face are imparted to the other end face in a compression coining process to facilitate rapid and repeatable alignment of the two sections when separated and rejoined during subsequent manufacturing steps.
摘要:
Films of hexagonal boron nitride are converted to a highly desirable cubic-like phase of boron nitride. The transformation is achieved by annealing the hBN material at temperatures below 1000.degree. C. The conversion may be conducted in a hydrogen, nitrogen, ammonia, vacuum, or inert gas containing atmosphere.
摘要:
A bipolar transistor is formed from epitaxial cubic boron nitride grown on a silicon substrate which is a three to two commensurate layer deposited by pulsed laser evaporation techniques. The thin film, cubic boron nitride bipolar transistor is in epitaxial registry with an underlying single crystal silicon substrate. The bipolar transistor is particularly suitable for high temperature applications.
摘要:
The wear resistance of a bi-directional tapered roller bearing is improved by applying a tribological coating to both the small and large end faces of the roller and to at least one of the rib faces of the bearing assembly.