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大多如角接触球轴承与圆锥滚子轴承一样,适用两套对置、游隙可调的轴承。如果预紧力超过所需限度,将会导致异常发热,,摩擦矩增大,疲劳寿命下降等等。所以,要充分研究工况、预紧目的来决定预紧力。滚动轴承预紧目的,(1)在轴的径向及轴向精确定位的同时,抑制轴的跳动。机床主轴轴承、测量仪器轴承。(2)提高轴承的刚度。机床主轴轴承、汽车差速器用轴承。(3)防止轴向振动及共振引起的异音。小型电机轴承等。(4)抑制滚动体的自旋滑动、公转滑动及自转滑动。高速角接触球轴承、推力球轴承等。(5)保持滚动体相对套圈的正确位置。推力球轴承、推力调心滚子轴承等,用在水平轴时。定位预紧是一种保证对置轴承在使用中不改变轴向相对位置的预紧方法。
因此,在不影响轴瓦受压条件的前提下,接触角愈小愈好。(3)接触角范围内的实际接触斑点愈多、愈细、愈均匀愈好。刮研轴瓦应以轴为基准,两者对研后利用内孔刮刀进行刮削。刮瓦的程序是先初刮下瓦,再初刮上瓦,然后精刮整个瓦,后刮侧间隙及存油点。轴瓦的刮研一般可分为粗刮。细刮和精刮三个过程。刮研时应采用取先重后轻、刮重留轻、刮大留小的原则。在刮研轴瓦时,不仅使接触点、接触角符合技术要求,而且要使顶。侧间隙达到规定的数值。首先把两下瓦装在轴承座中,然后在主轴上涂上一层显示剂(如红丹粉),将主轴装于轴承内,并向正反方向转动两三圈,接着将主轴取出,根据轴承上着色点的分布情况进行粗刮。粗刮阶段可采用正前角刮。头几遍手可以重一些。一支点双向固定,如下图所示,左端为固定支点,承受双向轴向力;右端为游动支点,只承受径向力,轴受热伸长时可作轴向游动。对于固定支点,轴向力不大时可采用深沟球轴承,其外圈左右两面均被固定。图中上半部分靠轴承座孔的凸肩固定,这种结构使座孔不能一次镗削完成,影响加工效率和同轴度。轴向力较小时可用孔用弹性挡圈固定外圈,如图中下半部分所示。为了承受向右的轴向力,固定支点的内圈也必须进行轴向固定。对于游动支点,常采用深沟球轴承,径向力大时也可采用圆柱滚子轴承,如图中下半部分所示。选用深沟球轴承时,轴承外圈与轴承盖之间留有较大间隙,使轴热膨胀时能自由伸长,但其内圈需轴向固定,以防轴承松脱。当游动支点选用圆柱滚子轴承时。
CF1754
CF2333
CFH2866
CFH2875
CFH288-7
CFH6331
YR586
YR7531
YR952
YR1045
YR1260
CF1/2NSB
CCF1/2NSB
CRSBC8
CF1/2S
CF1/2SB
CCF1/2SB
BCF1/2SB
CFE1/2SB
CCFE1/2SB
CF9/16SB
CF5/8NSB
CF5/8S
CF5/8B
CF5/8SB
CCF5/8SB
CFE5/8SB
CCFE5/8SB
CF1-1/16S
CF1-1/16SB
CCF1-1/16SB
CFE1-1/16SB
CF3/4S
CF3/4SPT
CF3/4B
CF3/4SB
CCF3/4SB
CFE3/4B
CFE3/4SB
CCFE3/4SB
CF7/8S
CF7/8SB
CCF7/8SB
CCFE7/8SB
CF1S
CF1B
CR1B-239
CF1SB
CCF1SB
CFE1SB
CCFE1SB
CF1-1/8B
CF1-1/8S
CF1-1/8SB
CCF1-1/8SB
CCFE1-1/8SB
CR1-1/4
CF1-1/4
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CR-1-1/4-XB
CRSB20
CCF1-1/4S
CCF1-1/4SB
BCFE1-1/4SB
CFE1-1/4SB
CR1-1/4XBE
CCFE1-1/4SB
CF1-3/8
CF1-3/8SB
CCF1-3/8S
CS44L
CCF1-3/8SB
CFE1-3/8SB
CCFE1-3/8SB
CF1-1/2S
CF1-1/2SB
S48LW
CCF1-1/2SB
CR1-1/2XBC
CFE1-1/2B
CNBE48SB
CFE1-1/2SB
CCFE1-1/2SB
CFD1-1/2
CCFD1-1/2
CRBC1-1/2OH
CF1-5/8S
S52L
CF1-5/8SB
CRSB26
CFD1-5/8
CCFD1-5/8
CCF1-5/8SB
CCF1-5/8SB-THT
CFE1-5/8SB
CCFE1-5/8SB
CR
CF1-3/4
CF1-3/4S
CCF1-3/4S
CF1-3/4SB
CCF1-3/4SB
CRBC1-3/4OH
CFD1-3/4
CCFD1-3/4
CRBC1-3/4OH
CFE1-3/4S
CFE1-3/4SB
CCFE1-3/4SB
CR1-3/4XBEC
BCF1-3/4S
CF1-7/8SB
CCF1-7/8SB
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CF2
CF2B
CF2S
CF2SB
CCF2
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CFE2SB
CCFE2SB
CFD2
CF2-1/4
CF2-1/4S
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CF2-1/2
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CCF2-1/2SB
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CFD4
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FCF2
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FCF3
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PCYR3
PCYR3-1/2
PCYR5
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CFH4
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CFH5S
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BCYR3/4S
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YCR12
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CYR1
CYR1S
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FLRY3
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VCYR4-1/2
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VLR5-1/2
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MCYRR5
MCYRR5S
MCYR5S
MCYRR6
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MCYR6S
MCYR6SX
MCYRR8
MCYRR8S
MCYRR8SX
MCYR8
MCYR8S
MCYRR10
MCYRR10S
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MCYR10SX
FYCRS10
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MCYRR12S
MCYRR12SX
MCYR12
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FYCR12
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MCYRR15
MCYRR15S
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MCYRR17
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MCYR17
MCYR17S
MCYR17SX
MCYRR20
MCYRR20X
MCYRR20S
MCYR20
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MCYRR25
MCYR25
MCYRR25S
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MCYRR30
MCYRR30S
MCYR30
MCYR30S
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MCYR35
MCYR35S
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MCYR40
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