摘要:
A snap cage (5) includes an annular cage body having a plurality of pockets (11) defined therein at respective circumferential locations for retaining a corresponding number of balls. Each of the pockets (11) also has an inner face formed with a recessed area (16) extending from a pocket open edge on a cage inner diametric side towards a cage outer diametric side.
摘要:
A tapered roller bearing includes bearing rings including an inner ring and an outer rings, a roller rolling between the inner ring and the outer ring, and a cage having a pocket holding the roller and located adjacent to the outer ring. A radial clearance δ between the cage and the outer ring when the cage is in a neutral position, a radial clearance δpr between the roller held in the pocket and the cages, and a circumferential clearance δpc between the roller held in the pocket and the cage satisfy relations δpr>δpc and −2≦(δ−δpr)/(δpr−δpc)≦0.
摘要:
A roller bearing comprises an outer ring, an inner ring, a plurality of rollers arranged between the outer ring and the inner ring, and a plurality of retainer segments (11a) having a plurality of column parts (14a) and (14b) extending in a direction along a shaft so as to form a pocket (13a) for holding the roller, and connection parts (15a) and (15b) extending in a circumferential direction so as to connect the plurality of column parts (14a) and (14b), and continuously lined with each other in the circumferential direction between the outer ring and the inner ring. The column part (14a) is positioned at an circumferential end of the retainer segment (11a). Here, a circumferential outer side end face (21a) of the column part (14a) positioned at the end is flat, and a circumferential inner side end face (25a) of the column part (14a) positioned at said end is provided with a recess (23a) recessed in the circumferential direction so as to reduce the thickness of the column part (14a).
摘要:
A phosphorescent phosphor having excellent afterglow luminance characteristics, even under low illumination intensity of radiation conditions, compared to conventional strontium aluminate phosphorescent phosphors of the same type, and particularly a phosphorescent phosphor having excellent initial afterglow luminance characteristics and excellent afterglow luminance characteristics at 60 and 90 minutes after cessation of the excitation, with following requirements: 0.015
摘要翻译:与常规的相同类型的锶铝酸盐磷光体磷光体相比,即使在低辐射条件的照明强度下,具有优异的余辉亮度特性的磷光体荧光体,特别是具有优异的初始余辉亮度特性和优异的余辉辉度特性的磷光体荧光体在60和90° 停止激发后几分钟,具有以下要求:<?in-line-formula description =“In-line formula”end =“lead”?> 0.015 <?in-line-formula description =“In-line Formulas”end = 导线“→0.03 <= Ba /(Sr + Ba)<= 0.2和2.1 <= Al /(Sr + Ba + Eu + Dy)<= 2.9 <?在线公式描述=”在线公式 “end =”tail“?>
摘要:
In order to provide a status monitoring system for accurately determining the contaminant water concentration in a lubricant oil used in a rolling device, the provision is made of a contaminant water concentration monitoring device (6) configured to monitor the contaminant water concentration in the lubricant oil (5). The contaminant water concentration monitoring device (6) includes an electrostatic capacitance detector (7) and an oil temperature measuring instrument (8), which are configured to detect the electrostatic capacitance and the oil temperature of the lubricant oil (5), respectively, and a water concentration calculation section (9) configured to detect the contaminant water concentration from the detected electrostatic capacitance and oil temperature in accordance with a predetermined rule.
摘要:
An object of the present invention is to provide a phosphorescent phosphor having an excellent afterglow luminance after 10 to 12 hours after sunset under the outdoor excitation conditions. The phosphorescent phosphor is represented by the formula (Sr1-a-b-x-yMgaBabEuxDyy)Al2O4, wherein a satisfies a relation 0.02≦a≦0.1, b satisfies a relation 0.03≦b≦0.15, x satisfies a relation 0.001≦x≦0.04, y satisfies a relation 0.004≦y≦0.05, and (a+b) satisfies a relation 0.08≦(a+b)≦0.2. The phosphorescent phosphor has an excellent afterglow luminance after a long period of period of time in a manner most suitable for outdoor applications.
摘要:
The method for calculating rotational torque between inner and outer rings of a four point contact ball bearing assembly includes an individual torque calculation step for calculating the rotational torque for each of rolling elements and a total sum calculation step for determining the rotational torque. In the individual torque calculation step, data on a contact condition representative of the extent of approximation to the two point contact state or four point contact state is used. For the contact condition data, the four point contact ratio Cf, which is the ratio of surface pressure of one of respective maximum contact pressures P1 and P2 between two partial raceways in an inner ring or outer ring, which one is higher than the other of the maximum contact pressures P1 and P2, relative to a surface pressure of the other of the maximum contact pressures, is used.
摘要:
A tapered roller bearing includes bearing rings including an inner ring and an outer ring, a roller rolling between the inner ring and the outer ring, and a cage having a pocket holding the roller and located adjacent to the outer ring. A radial clearance δ between the cage and the outer ring when the cage is in a neutral position, a radial clearance δpr between the roller held in the pocket and the cage, and a circumferential clearance δpc between the roller held in the pocket and the cage satisfy relations δpr>δpc and −2≦(δ−δpr)/(δpr−δpc)≦0.
摘要:
A cage (5) for a ball bearing assembly has a pocket (11) for accommodating one of balls defined at a plurality of locations in a direction circumferentially thereof and each of the pockets has an inner surface so shaped as to represent a concaved spherical surface. A concaved portion (13) extending from an open edge on the cage inner diametric side towards the cage outer diametric side is provided in an inner surface of each of the pockets (11). The sectional shape of the inner surface of this concaved portion (13) in a cage circumferential direction is represented by an arcuate shape of a radius of curvature (Rb) smaller than the radius of curvature (Ra) of the concaved spherical surface defining the inner surface of the respective pocket (11). The inner surface of each of the pockets (11) may be formed with a film.
摘要:
A cage (5) used in a ball bearing assembly is rendered to be of a ring shape having a plurality of pockets (5a) defined therein for holding a corresponding number of balls (4) in a circumferential row. The radius (Rp) of a bore of a circumferentially extending body of the cage (5) as measured from the geometric center of the bore to an inner peripheral surface area of the circumferentially extending body aligned with each of the pockets (5a) is chosen to be greater than the radius (Ri) as measured from the geometric center of the bore to a different inner peripheral surface area of the circumferentially extending body intermediate between the neighboring pockets (5a).