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论述白色金属轴承合金正确的工作环境

2025/10/23 15:53:33发布12次查看
在选择巴氏合金轴瓦为特定的工作,正确的类型有多种因素考虑,出口的大部分是如下:
1. 1。 轴表面速度
2. 2。 承载须传动
第二,但同样重要的是,以下几点也必须考虑到:
a. 动力支持的连续性 d.润滑
b. 粘接的可能性 e. 清洁度
c. 冷却设施 f. 密切关注相关轴承
毫无疑问 , 如果轴承高度就其规模,高锡合金装量是可取的,在较慢的工作速度下,少负载过重,就更为经济。
1. 1。 轴的表面速度:( 即每分钟轴的圆周英尺比。)
π= 3.1416
公式:
πx长x转速 = 商 d =轴直径
12 转速 =每分钟转数
s =轴表面速度 ,
2. 2。 承担压力: 每平方英寸磅测量压力。w =总重量由轴承
例如:确定表面有2英寸直径轴转速1400
pi x d x rpm = 3.1416 x 2 x 1,400 = 733.04 ft/min
12 12
确定了一个2英寸号轴承负荷,5英寸长,载着三千一百英镑重量
___w___
= l
i.d x l.o.b.
_____w_____
= 3,100 = 310 lbs/sq.in
i.d x l.o.b.
2 x 5
astm alloy number
yield point, psi d (mpa)
johnson's apparent elastic limit psi (mpa) e
melting point of (oc) proper pouring temp of(oc)
68of(20oc)
212of(100oc)
68of(20oc) 212of(100oc)
1 4400 (30.3) 2650 (18.3) 2450 (16.9) 1050 (7.2) 433 (223) 825 (441)
2 6100 (42.0) 3000 (20.6) 3350 (23.1) 1100 (7.6) 466 (241) 795 (424)
3 6600 (45.5) 3150 (21.7) 5350 (36.9) 1300 (9.0) 464 (240) 915 (491)
7 3550 (24.5) 1600 (11.0) 2500 (17.2) 1350 (9.3) 464 (240) 640 (338)
8 3400 (23.4) 1750 (12.1) 2650 (18.3) 1200 (8.3) 459 (237) 645 (341)
15 no data no data no data no data 479 (248) 662 (350 )
d the values of yield point were taken from stress-strain curves at deformation of 0.125% of gage length
e johnson's apparent elastic limit is taken as the unit stress at the point where the slope of the tangent to the curve is 2/3 times its slope in origin
there are many formulas for standard grade babbitt but they fall into two main classifications:
babbitt classification
limits
surface speeds
(# of ft/min) load
(lbs/sq.in.)
min. max. min. max.
tin-based babbitts 1,000 2,400 100 2,000
lead based babbitts 100 1,000 100 500
tin based alloys - chemical composition (%) chart
industry name astm b23 -t-390a sn
(tin) sb
(antimony) cu
(copper) pb
(lead)
marine 11 d - - 90.0 - 92.0 4.5 - 5.5 3.5 - 4.5 0.35 (max)
no. 1 grade 1 no. 1 90.0 - 92.0 4.0 - 5.0 4.0 - 5.0 0.35 (max)
nf a 56-101 (code 101) - - 89.0 - 91.0 5.75 – 7.25 2.75 – 4.25 0.35 (max)
nf a 56-101 (code 111) - - 89.0 - 91.0 5.75 – 7.25 2.75 – 4.25 0.10 (max)
marine 11r - - 89.0 - 89.5 7.5 - 8.5 2.5 - 3.0 0.35 (max)
nickel genuine grade 2 no. 2 88.0 - 90.0 7.0 - 8.0 3.0 - 4.0 0.35 (max)
marine 11 - - 88.0 - 90.0 5.5 - 6.0 5.0 - 5.5 0.35 (max)
4x royal nickel genuine - - 87.5 - 89.5 7.25 - 7.75 3.25 - 3.75 0.35 (max)
diesel special - - 87.5 - 88.0 6.5 - 7.0 5.0 - 6.0 0.35 (max)
nf a 56-101 (code 102) - - 87.0 - 89.0 6.75 – 8.25 2.75 – 4.25 0.35 (max)
nf a 56-101 (code 112) - - 87.0 - 89.0 6.75 – 8.25 2.75 – 4.25 0.10 (max)
grade 11 grade 11 - 86.0 - 89.0 6.0 - 7.5 5.0 - 6.5 0.35 (max)
sae 11 - - 85.0 - 87.0 7.0 - 8.0 6.0 - 7.0 0.35 (max)
imperial genuine - - 85.0 - 87.0 6.5 - 7.5 6.5 - 7.5 0.35 (max)
turbine - - 84.0 - 86.0 6.5 - 7.5 7.5 - 8.5 0.35 (max)
royal armature - - 83.5 - 84.0 8.0 - 8.5 7.5 - 8.5 0.35 (max)
super tough grade 3 no. 3 83.0 - 85.0 7.5 - 8.5 7.5 - 8.5 0.35 (max)
nf a 56-101 (code 103) - - 82.0 - 84.0 10.25 – 11.75 5.25 – 6.75 0.35 (max)
nf a 56-101 (code 113) - - 82.0 - 84.0 10.25 – 11.75 5.25 – 6.75 0.10 (max)
no. 4 - no. 4 80.5 - 82.5 12.0 - 14.0 5.0 - 6.0 0.35 (max)
nf a 56-101 (code 104) - - 79.0 - 81.0 9.25 – 10.75 9.25 – 10.75 0.35 (max)
nf a 56-101 (code 114) - - 79.0 - 81.0 9.25 – 10.75 9.25 – 10.75 0.10 (max)
nf a 56-101 (code 106) - - 79.0 - 81.0 11.25 – 12.75 5.00 – 7.00 1.5 – 2.5
nf a 56-101 (code 105) - - 77.0 - 79.0 12.25 – 13.75 8.25 – 9.75 0.35 (max)
nf a 56-101 (code 115) - - 77.0 - 79.0 12.25 – 13.75 8.25 – 9.75 0.10 (max)
grade 4 grade 4 - 74.0 - 76.0 11.0 - 13.0 2.5 - 3.5 9.3 - 10.7
nf a 56-101 (code 107) - - 73.0 - 75.0 6.00 – 8.00 3.00 – 5.00 3.00 – 5.00
no. 5 - no. 5 61.0 - 63.0 9.5 - 10.5 2.5 - 3.5 24.0 - 26.0
maximum allowable impurities: fe=0.08, as=0.10, bi=0.08, zn=0.005, al=0.005, cd=0.05
lead based alloys - chemical composition (%) chart
industry name astm b23 -t-390a sn
(tin) sb
(antimony) pb
(lead) as
(arsenic)
choker - - - 6.5 - 7.5 92.0 - 94.0 0.20
durite grade 15 no. 10 0.8 - 1.2 14.5 - 17.5 balance 0.8 - 1.4
hardware no. 4 - - 1.0 - 2.0 12.3 - 14.3 84.2 - 86.2 0.20
silverstone - - 1.0 - 3.0 17.5 - 18.5 balance 0.25 (max)
no. 13 - no. 13 4.0 - 6.0 8.0 - 10.0 83.0 - 88.0 0.20
mill anchor - - 4.0 - 6.0 11.5 - 12.5 balance 0.25 (max)
royal grade 8 no. 6 4.5 - 5.5 14.0 - 16.0 balance 0.30 - 0.60
star - - 5.0 - 5.5 13.5 - 14.5 balance 0.30 - 0.60
nf a 56-101 (code 201) - - 5.0 - 7.0 14.0 – 16.0 77.0 – 79.0 (0.5-1.0 cu)
grade 13 grade 13 - 5.5 - 6.5 9.5 - 10.5 balance 0.25 (max)
nf a 56-101 (code 202) - - 9.0 - 11.0 14.0 – 16.0 74.0 – 76.0 (0.5-1.0 cu)
no. 11 - no. 11 9.0 - 11.0 11.5 - 13.5 74.0 - 79.0 0.20
sawguide - - 9.0 - 11.0 18.5 - 19.5 balance 0.25 (max)
heavy pressure grade 7 no. 7 9.3 - 10.7 14.0 - 16.0 balance 0.30 - 0.60
maximum allowable impurities: cu=0.50, fe=0.10, bi=0.10, zn=0.005, al=0.005, cd=0.05
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