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The imported bearings selected key factors  

2012-11-01 10:22:17|  分类: 技术 |  标签: |举报 |字号 订阅

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      1)、轴承的安装空间 能容纳于轴承安装空间内的skf轴承型 由于设计轴系时注重轴的刚性和强度,因此一般先确定轴径,即轴承内径。但滚动轴承有多种尺寸系列和类型,应从中选择最为合适的轴承类型。
      1), the installation space of the bearing can be accommodated in the bearing mounting space within the the skf bearings type design shafting focus axis the rigidity and strength, it is generally first determine the shaft, i.e., the bearing inner diameter. But there are a variety of rolling bearings of dimension series and type, should choose the most suitable type of bearing.
      2)、负荷 nsk轴承负荷的大小、方向和性质[轴承的负荷能力用基本额定负荷表示,其数值载于轴承尺寸表] 轴承负荷富于变化,如负荷的大小、是否只有径向负荷、轴向负荷是单向还是双向、振动或冲击的程度等等。在考虑了这些因素后,再来选择最为合适的轴承类型。
      2), load nsk bearings load size, direction and nature of the load bearing capacity of basic load ratings, said the values set out in the the the bearing size table] bearing load varied, such as the size of the load, whether only radial load axis to the load is a unidirectional or bidirectional, the degree of vibration or shock, and so on. After considering these factors, again select the most suitable type of bearing.
     3)、转速 能适应机械转速的fag轴承类型[轴承转速的界限值基准用极限转速表示,其数值载于轴承尺寸表] 轴承的极限转速不仅取于轴承类型还限于轴承尺寸、保持架型式、精度等级、负荷条件和润滑方式等,因此,选择时必须考虑这些因素。
     3), the speed can adapt to the fag bearings type of mechanical speed bearing speed limit value basis, with a limit of speed, said the values set out in the the the bearing size table] bearing speed limit not only take on the bearing size, bearing type limited cage type, accuracy class, load conditions and lubrication method, therefore, the choice must take into account these factors.
     4)、旋转精度 具有所需旋转精度的ntn轴承类型[轴承的尺寸精度和旋转精度已由GB按轴承类型标准化了] 机床主轴、燃汽轮机和控制机器分别要求高旋转精度、高转速和低摩擦,这时应该使用5级精度以上的轴承。
     4), rotational accuracy rotation precision required ntn bearing type [bearing the dimensional accuracy and rotational accuracy by GB standardized bearing type machine tool spindle, gas turbine and control machines require high rotational accuracy, high speed and low friction should use more than five precision bearings.
     5)、刚性 能满足机械轴系所需刚性的timken轴承类型[轴承承受负荷时,滚动体与滚道的接触部分会产生弹性变形。“高刚性”是指这种弹性变形的变形量较小] 在机床主轴和汽车末级减速装置等部位,在提高轴的刚性的同时,还必须提高轴承的刚性。滚子轴承承受负荷生的变形比球轴承小。对轴承施加预紧(负游隙)可以提高刚性。该方法适用于角接触球轴承和圆锥滚子轴承。
     5), just performance to meet the mechanical shafting the required rigidity timken bearings type bearings to withstand load, the contact part of the rolling element and raceway will produce elastic deformation. "High rigidity" refers to the amount of deformation of this elastic deformation is smaller] in the machine tool spindle and the final-stage reduction gear device of the automobile and other parts, to improve the rigidity of the shaft at the same time, must also improve the rigidity of the bearing. Roller bearings under load deformation of the students is smaller than the ball bearings. Preload (negative clearance) can increase the rigidity of the bearing. The method is suitable for the angular contact ball bearings and tapered roller bearings.
     6)、内圈与外圈的相对倾斜 分析使koyo轴承内圈与外圈产生相对倾斜的因素(如负荷引起的轴的挠曲、轴及外壳的精度不良或安装误差),并选择能适应这种使用条件的轴承类型。 如果内圈与外圈的相对倾斜过大,轴承会因产生内部负荷造成损伤。因此应选择可以承受这种倾斜的轴承类型。
     6), the relative inclination of the inner ring and the outer ring analysis Koyo bearings inner and outer ring relative tilt factors (such as the load caused by the deflection of the shaft, the accuracy of the shaft and housing, bad or mounting error), and choose to adapt such a use condition of the bearing type. If the relative inclination of the inner ring and the outer ring is too large, the bearing will generate internal load damage. Should choose the type of bearing can withstand this tilt.
7)、安装与拆卸 定期检查等的装拆频度及装拆方法 装拆频繁时,使用内圈与外圈可分离的圆柱滚子轴承,滚针轴承及圆锥滚子轴承较为方便。圆锥孔调心球轴承及圆锥孔调心滚子轴承通过使用紧固件或退卸套可便于装拆。
    7), the installation and removal of periodic inspection such as assembly and disassembly and installation method dismantle frequently use separable inner and outer rings of cylindrical roller bearings, needle roller bearings and tapered roller bearings. -Aligning ball bearings and tapered bore Spherical roller bearings sleeve through the use of fasteners or refund can be easy to dismantle.

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