摘要:
A ball bearing is described, which comprises an outer ring having on its inner periphery an outer raceway, an inner ring having on its outer periphery an inner raceway, plural balls rotatably disposed between the outer raceway and the inner raceway, a cage holding the plural balls in a freely rotatable manner, and a grease packed in a space between the outer raceway and the inner raceway, wherein the inner peripheral surface of each pocket of the cage contains a spherical part consisting of a spherical concave surface whose radius of curvature is slightly larger than that of each ball and a curved part which has the radius of curvature being larger than that of the spherical part and is smoothly continuous from the end of the spherical part toward the end thereof on the opening side of the pocket.
摘要:
A rolling bearing to exhibit outstanding initial (cage) acoustic characteristics at the start of operation under a low temperature atmosphere, suppress fretting damages (abrasions) and reduce bearing torque by making the radius of curvature of the cross-sectional shape of the inner raceway and the radius of curvature of the cross-sectional shape of the outer raceway equal to 51.0% to smaller than 60.0% of the diameter of the rolling element, and packing a grease composition comprising a base oil that is a mixture of a lubricant containing a polar group in its molecular structure and a non-polar lubricant and a metallic soap-based thickener containing a long-fiber material with a major axis part length of at least 3 &mgr;m.
摘要:
A cage for a rolling bearing; the cage is obtained by molding a resin composition comprising 100 parts by weight of a heat-resistant and oil-resistant resin and from 5 to 100 parts by weight of a polyolefin and immersing the resulting molded article in a lubricating oil. Also is disclosed is a rolling bearing with the cage fitted therein and having been subjected to oil plating.
摘要:
A grease composition is disclosed, wherein a metallic soap-base thickener containing a long-fiber material having a major axis part length of at least 3 μm is blended with a base oil obtained by mixing a lubricating oil having a polar group within the molecule structure and a non-polar lubricating oil, which can improve the initial sound (cage sound) of bearing at the starting of operation in a low-temperature environment and is effective on the reduction of fretting damage (abrasion) or torque, and also a rolling bearing and a linear acting apparatus each obtained by packing the grease composition are disclosed, which exhibit excellent low-temperature acoustic property and are reduced in the fretting damage (abrasion) or torque.
摘要:
A grease composition for rolling bearing comprising a metal soap-based thickening agent containing a long fiber-like material having a major axis length of at least 3 &mgr;m incorporated in a base oil comprising a lubricant having a polar group in its molecular structure and a non-polar lubricant blended in combination.
摘要:
A rolling bearing lubricated with a grease includes an outer ring, an inner ring, a plurality of rolling elements disposed between respective rolling raceway tracks of the outer ring and the inner ring, and a retainer having a plurality of pockets for locking the rolling elements to freely roll and formed of resin material. In the rolling bearing, the radial clearance gap ratio of the pockets of the retainer is set to 0≦δr/Da≦0.09, and the axial clearance gap ratio of the pockets is set to 0≦δa/Da≦0.06 when the kinematic viscosity of base oil at 40° C. of the grease is 10 to 40 mm2/sec, being set to 0≦δa/Da≦0.05 when the kinematic viscosity of base oil is 10 to 90 mm2/sec, being set to 0≦δa/Da≦0.025 when the kinematic viscosity of base oil is 10 to 160 mm2/sec.
摘要翻译:用润滑脂润滑的滚动轴承包括外圈,内圈,设置在外圈的各个滚动轨道和内圈之间的多个滚动元件,以及具有多个用于将滚动元件锁定的凹槽的保持器 自由滚动和形成树脂材料。 在滚动轴承中,保持器的凹穴的径向间隙间距比被设定为0 <= deltar / Da <= 0.09,并且凹穴的轴向间隙间距比被设定为0 <Δa/ Da <= 0.06 当基础油在40℃下的润滑脂的运动粘度为10〜40mm×2 / sec时,当基础油的运动粘度为0时,Δa/ Da <= 0.05 当基础油的运动粘度为10至160mm 2 /秒时,其为10至90mm 2 / sec,设定为0 <Δa/ Da <= 0.025 。
摘要:
A rolling bearing lubricated with a grease includes an outer ring, an inner ring, a plurality of rolling elements disposed between respective rolling raceway tracks of the outer ring and the inner ring, and a retainer having a plurality of pockets for locking the rolling elements to freely roll and formed of resin material. In the rolling bearing, the radial clearance gap ratio of the pockets of the retainer is set to 0≦δr/Da≦0.09, and the axial clearance gap ratio of the pockets is set to 0≦δa/Da≦0.06 when the kinematic viscosity of base oil at 40° C. of the grease is 10 to 40 mm2/sec, being set to 0≦δa/Da≦0.05 when the kinematic viscosity of base oil is 10 to 90 mm2/sec, being set to 0≦δa/Da≦0.025 when the kinematic viscosity of base oil is 10 to 160 mm2/sec.
摘要翻译:用润滑脂润滑的滚动轴承包括外圈,内圈,设置在外圈的各个滚动轨道和内圈之间的多个滚动元件,以及具有多个用于将滚动元件锁定的凹槽的保持器 自由滚动和形成树脂材料。 在滚动轴承中,保持器的凹穴的径向间隙间距比被设定为0 <= deltar / Da <= 0.09,并且凹穴的轴向间隙间距比被设定为0 <Δa/ Da <= 0.06 当基础油在40℃下的润滑脂的运动粘度为10〜40mm×2 / sec时,当基础油的运动粘度为0时,Δa/ Da <= 0.05 当基础油的运动粘度为10至160mm 2 /秒时,其为10至90mm 2 / sec,设定为0 <Δa/ Da <= 0.025 。
摘要:
The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.
摘要:
In a lubricant application system, a prescribed volume of lubricant is transferred from a lubricant discharge port 8 of a prescribed liquid volume discharge device to a rolling element 703 of a rolling bearing 700 in a state in which the lubricant discharge port 8 is positioned directly above and sufficiently close to the rolling element 703, whereby the lubricant is applied to the interior of the rolling bearing 700. Further, the application system inspects whether or not a prescribed volume of lubricant is injected from the discharge device for injecting a lubricant into the interior of a rolling bearing 700. A laser beam L1 is irradiated between a lubricant discharge port 8 of the lubricant discharge device and the rolling bearing 700, and a reflected laser beam L2 reflected by the lubricant when it is discharged from the lubricant discharge port 8 is received by a photoreceptor 116 disposed on the optical axis of the reflected laser beam L2, whereby whether or not the lubricant is applied to the rolling bearing 700 is determined based on an output from the photoreceptor 116.
摘要:
This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises a base oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower. A ball bearing to be favorably used at high temperature comprises an inner race and an outer race, and a plurality of balls freely rotating between both races, and the conductive grease packed into a space defined between both races and holding the plural balls therein, and the conductive grease comprises the base oil, a thickener comprising fluorine compound or silicone compound and 0.2 to 10 wt % of the carbon black.