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论述白色金属轴承合金正确的工作环境

2010年08月06日 10:38:11来源:河南路拓工贸有限公司作者:商水县有色金属厂关键词:

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。  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:(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 oFoC 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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