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qmj.zgong.com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 , |
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 |
|
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 |
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