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轴承公差定义

(2010-11-30 14:02:53)
标签:

轴承

公差

内圈

外径

外圈

端面

径向

杂谈

分类: bearings

内径 http://b.bst.126.net/common/portrait/face/preview/face50.gif

1.d/ds
d是指公称内径;ds表示单一内径(Nominal bore diameter/Single bore diameter) --滚动轴承公称内径一般作为内孔表面偏差基准值(基准直径)

2.  dsp  single bore diameter measured in one raidal plane-单一平面单一内径-与一特定径向平面相关的单一内径.

3. .△ds
单一内径偏差(ds-d;deviation of single bore diameter from the nominal dimension) -单一内径与公称内径之差

4. .Vds
单一内径偏差(ds-d;deviation of single bore diameter from the nominal dimension) -单个套圈最大的与最小单一内径之差.Vds=ds max-ds min

5 dm
平均内径(基本圆柱孔)-单个套圈最大与最小单一内径的算术平均值.mean bore diameter. dm=(ds max + ds min)/2

6. .△dm
Deviation of mean bore diameter from the nominal demension. dm=dm-d

7.dmp
dmp表示单一平面平均内径(Mean bore diameter;arithmetical mean of the largest samallest single bore diamerers measured in one radial plane) ---最大与最小单一平面单一内径的算术平均值
8.△
dmp
单一平面平均内径偏差(dmp-d;Deviation of mean bore diameter from the nominal dimension)

9.Vdp
单一径向平面内径变动量(Bore diameter variation;difference between the largest & smallest single bore diameters in one radial plane)

10.Vdsp
单一径向平面内径变动量--最大与最小单一平面单一内径之差 Vdsp=dsp max - dsp
min
11.Vdmp
单一平面内径变动量.(dmp max-dmp min;Mean bore diameter variation;difference between the largest & smallest mean bore diameters)

外径http://b.bst.126.net/common/portrait/face/preview/face50.gif

1. :公称外径<基本圆柱外表面>.滚动轴承的公称外径一般作为实际外表面偏差的基准值(基本直径)Nominal outside diameter
2. Ds :单一外径。与实际外表面和一径向平面的交线相切的两条平行线之间的距离。Single outside diameter

3. Dsp :单一平面单一外径。与一特定径向平面相关的单一外径。

4. △Ds :单一外径偏差《基本圆柱外表面》。单一外径与公称外径之差。Ds =Ds max - Ds min

5. VDs 外径变动量《基本圆柱外表面》。单个套圈最大与最小单一外径之差  VDs=Ds max - Ds min

17. Dm :平均外径 mean outside diamter。单个套圈最大与最小单一外径的算术平均值。Dm=(Ds max + Ds min)/2

18. Dm 平均外径偏差《基本圆柱外表面》。平均外径与公称外径之差。△Dm =Dm- D

19. Dmp
单一平面平均外径(Mean outside diameter;arithmetical mean of the largest & smallest single outside diameters in one radial plane) △Dm=Dm-D-最大与最小单一平面单一外径的算术平均值

20.Dmp
单一平面平均外径偏差(Dmp-D;Deviation of mean outside diameter from nominal dimension) 单一平面平均外径与公称外径之差.
21.V
Dp
单一径向平面外径变动量(Outside diameter variation;difference between the largest & smallest single outside diameter in one radial plane).

22. VDsp :  单一平面外径变动量.最大与最小单一平面单一外径之差.VDsp=Dsp max - Dsp min

23 .VDmp
平均外径变动量(Dmp max-Dmp min;Mean outside diameter variation;difference between the largest & smallest mean outside diameters) -单个套圈最大与最小单一平面平均外径之差.

宽度和高度http://b.bst.126.net/common/portrait/face/preview/face50.gif

 

1. B:(内圈)或C(外圈):套圈公称宽度。套圈两理论端面间的距离。注:滚动轴承公称宽度一般作为实际宽度偏差的基准值(基本尺寸)
2. Bs/Cs
内圈/外圈单一宽度(Single inner ring/outer ring width) 套圈实际两端面与基准端面切平的垂直线交点间的距离。
3.△Bs
内圈单一宽度偏差(Bs-B; Deviation of a single inner ring width from nominal dimension) -内圈单一宽度和公称宽度之差。
4.△Cs
外圈单一宽度偏差(Cs-C; Deviation of a single outer ring width from nominal dimension) -外圈单一宽度和公称宽度之差。
5.V
Bs
内圈宽度变动量(Bs max-Bs-min; Variation of inner ring widths; difference between the largest & smallest single inner ring width) -单个内圈最大与最小单一宽度之差。
6.VCs
外圈宽度变动量(Cs max-Cs min; Variation of outer ring widths; difference between the largest & smallest single outer ring width) -单个外圈最大与最小单一宽度之差。

7. Bm或cm :内外圈平均高度。单个内圈或外圈最大与最小单一宽度的算术平均值。Bm=(Bs max + Bs min)/2或(Cs max + Cs min)/2
18.
B,C,T
轴承公称宽度/高度(Nominal bearing width/height) - 限定轴承宽度的两套圈理论端面间的距离。
19.T
s
轴承实际宽度/高度(Actual bearing width/height)<由内圈一端面和外圈一端面来限定轴承宽度的向心轴承>。轴承轴线与限定轴承宽度的套圈实际端面两切平面交点间的距离。注:单列圆锥滚子轴承实际宽度为轴承轴线与下述两平面交点间的距离:一平面是内圈实际背面的切平面,另一平面是外圈实际背面的切平面。此时,内、外圈滚道以及内圈背面挡边均与所有滚子接触。
20.△
Ts
轴承实际宽度/高度偏差(Deviation of the actual bearing width/height) <由内圈一端面和外圈一端面>

套圈倒角尺寸http://b.bst.126.net/common/portrait/face/preview/face50.gif

1. r:公称倒角尺寸。作为基准的倒角尺寸值。(Norminal chamfer dimension)

2. rs:单一倒角尺寸。单一轴向平面内,套圈的假想尖角到倒角表面与套圈端面交点间的<径向>距离。单一轴向平面内,套圈的假想尖角到倒角表面与套圈内孔或外表面交点间的<轴向>距离。(Radial/axial single chamfer dimension)

3. rs min:最小单一倒角尺寸<最小极限尺寸>。允许的最小径向和轴向单一倒角尺寸。注:它是在轴向平面内、与套圈端面及内孔或套圈外表面相切的一假想圆弧的半径,套圈材料不应超出其外。(Smallest radial/axial single chamfer dimension)

4. rs max:最大单一倒角尺寸<最大极限尺寸>。允许的最大径向和轴向单一倒角尺寸。(Largest radial/axial single chamfer dimension)

形位公差http://b.bst.126.net/common/portrait/face/preview/face50.gif

1. 形状

圆度误差:<沿表面基本圆形线的>:线(内表面)的内切圆或线(外表面)的外接圆与线上任意点间的最大径向距离。

圆柱度误差<基本圆柱面的>:表面(内表面)的内切圆柱体或围绕表面(外表面)的外接圆柱体与表面上任意点间在任意径向平面内的最大径向距离。

球形误差:<基本球形表面的>:表面(内表面)的内切球体或围绕表面(外表面)的外接球体与表面上任意点间在任意赤道平面内的最大径向距离。

2. 滚道平行度

Si:内圈滚道对端面的平行度<沟型向心球轴承>。基准端面的切平在与内圈滚道中部间的最大与最小轴向距离之差。

Se:外圈滚道对端面的平行度<沟型向心球轴承>。基准端面的切平面与外圈滚道中部间的最大与最小轴向距离之差。

3. 表面垂直度

Sd:内圈端面对内孔的垂直度。在距轴线的径向距离等于端面平均直径一半处,垂直于内圈轴线的平面与内圈基准端面间的最大与最小轴向距离之差。内圈基准端面对内圈的跳动(Side face runout of inner ring with reference to bore)

SD:外圈外表面对端面的垂直度〈基本圆柱面〉。在与外圈基准端面的切平面平行的径向,在距离外圈两端面1.2倍最大轴向单一倒角尺寸的距离内,外表面同一素线上各点相对位置的总变动量。外表面母线对基准端面倾斜度变动量(Variation in inclination of outside cylindrical surface to outer ring side face)

4. 厚度变动量

ki:内圈滚道与内孔间的厚度变动量< 向心轴承>。内孔表面与内圈滚道中部间的最大与最小径向距离之差。

ke:外圈滚道与背面间的厚度变动量<向心轴承>。外表面与外圈滚道中部间的最大与最小径向距离之差。

Si:轴圈滚道与背面间的厚度变动量<推力轴承的平底面>。轴圈背面与其对面滚道中部间的最大与最小轴向距离之差。

Se:座圈滚道与背面间的厚度变动量<推力轴承的平底面>。座圈背面与其对面滚道中部间的最大与最小轴向距离之差。

旋转精度http://b.bst.126.net/common/portrait/face/preview/face50.gif

1. 径向跳动

Kia
成套轴承内圈径向跳动<向心轴承>(Radial runout of assembled bearing inner ring) 。内圈内孔表面在内圈不同的角位置相对外圈一固定点间的最大与最小径向距离之差。
Kea
成套轴承外圈径向跳动(Radial runout of assembled bearing outer ring) 。外圈外表面在外圈不同的角位置相对内圈一固定点间的最大与最小径向距离之差。

2. 轴向跳动。
Sia
成套轴承内圈轴向跳动(Axial runout; assembled bearing inner ring face runout with raceway)
Sea
成套轴承外圈轴向跳动(Axial runout;assembled bearing;outer ring face runout with raceway)

 Gr: gap radial 径向游隙  Ga:gap axial 轴向游隙

 



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