CB/T 3861-1999 Marine Fairlead Roller

CB/T 3861-1999 Marine Fairlead Roller CB/T3861-1999 Standard download decompression password: www.bzxz.net

UDC 629.12.015
National Standard of the People's Republic of China
Adjusted to 386-99
GB 1010588
Marine roller fair leads
Published on 1988-12-10
Implemented on 1989-10-01
Published by the State Bureau of Technical Supervision
National Standard of the People's Republic of China
Marine roller fair leads
Marine roller fair leads
Subject content and scope of application
This standard specifies the type, specification and size, technical requirements and test methods of roller fair leads. The roller fair leads specified in this standard are only applicable to guiding mooring cables. Cited standards
GB1102—74
GB699--65
GB979—67
Round strand wire rope
High-quality carbon structural steel grades and general technical conditionsClassification and technical conditions of carbon steel castings
GB1176—74＇
Cast copper alloy
3The types and main dimensions of the cable guide roller shall be as shown in Figure 1 and Table 1. China State Shipbuilding Corporation approved 629.12 on September 13, 1988
GB10105-88
Implementation on October 1, 1989
GB10105-88
1-roller; 2-lower sleeve; 3-pin;
Maximum diameter of applicable cable (reference)
Steel cable (GB1102)
Tensile strength 1550MPa
(155kgf/mm2)
5-nut, 6-screw, 7-oil cup
4-upper sleeve,
The dimensions of the roller shall be in accordance with Figure 2 and Table 2.
GB.10105-88
3.2The dimensions of the pin shall be in accordance with Figure 3 and Table 3.
M48×3
M48×3
119M72×4
M72×4
GB10105-88
jdi2disHh
85M8×1
69110M8×1
89|130|M10×1||tt ||99150M10×1
109170M10×1
149JM80×4
M90×4
180M10×1
C2×45
Dredge wheel diameter
GB10105-83
3.4The dimensions of the lower sleeve shall be in accordance with Figure 5 and Table 5.
Roller diameter
GB10105-88
3.5The dimensions of the nut shall be in accordance with Figure 6 and Table 6.
Roller diameter
Marking example
Fairlead roller with roller diameter D=150mm
GB10105-88
M48×3
M48×3
M72×4
M72×4
M80×4
M100×4
Fairlead roller
5 Technical requirements
GB 10105—88
Fairlead rollers shall comply with the requirements of this standard. 5.2
Main parts and materials of the fairlead rollers shall be in accordance with Table 7. Parts name
Upper sleeve, lower sleeve
GB1010588
High-quality carbon steel
Cast aluminum bronze
High-quality carbon steel
ZG25Ⅱ
ZQA19-2
GB 979
GB 1176
5.3 The casting parts of the cable guide roller should not have defects such as sand sticking, cracks, shrinkage holes and scarring, as well as defects that affect strength. The rotating part of the cable guide roller should be flexible.
6 Test method
6.1 Push the roller by hand to test the flexibility of the roller rotation. 6.2 Wear gloves to touch the contact surface of the roller and feel smooth without burrs. 7 Inspection rules
7.1 The cable guide roller should be inspected and accepted by the technical inspection department of the manufacturer, and a certificate of conformity should be issued. 7.2 The surface of the cable roller after acceptance should be painted with asphalt paint, and the oil holes of the oil cup and the pin should be filled with grease. 8 Marking
The cable roller after acceptance should have the following markings: a. Manufacturer name or mark
Model and standard number,
Production batch number or production year and month,
Inspection pass stamp.
GB10105—88
Appendix A
Strength calculation
(reference)
A1 According to the actual working state, the external force (cable tension) acting on the roller is supported by the pin and bears the bending moment, so the pin is the main component of the strength verification.
A2 When calculating the load, it should be considered that the cable is broken and the cable roller is intact, then the calculated load value is taken as twice the cable breaking load value, and the force direction is perpendicular to the center line of the pin for calculation. A3 The cables applicable to this standard include synthetic fiber ropes, hemp ropes and steel ropes. The breaking load values ​​used in the calculation are shown in Table A1. Table A1
Diameter and breaking load
Diameter mm
Breaking load kN (tf)
Diameter mm
Breaking load kN (tf)
Breaking load kN (tf)
Breaking load kN (tf)
Breaking load kN (tf)
Breaking load kN (tf)
.Diameter mm
Breaking load kN (tf)
Synthetic fiber rope
97.08 (9.9)
146.1(14.9)
180.4 (18.4)
220.6(22.5)
263.8(26.9)
360.9(36.8)
526:6(53.7)
Steel rope (GB1102)
Tensile strength 1550MPa (155kgf/mm2) 6 ​​×24||tt| |117.2 (12) | | tt | | 209.9 (21.4) | | tt | | 247.1 (25.2) | | tt | ×37
105.9(10.8)
175.5(17.9)
262.8(26.8)
366.8 (37.4)
556.0(56.7)
704.1(71.8)
868.9 (88.6)| |tt||
breaking load used in strength calculation
kN(tf)
127(13)
206(21)
275(28)
412(42)
598 (61)
726 (74)
883(90)
Verification of pin strength
GB10105-88
Pin material: 25, tensile strength gg460MPa (46kgf/mm2), according to the structure of the cable guide roller (the position where the bushing contacts the shaft), the distribution of the external load on the shaft and the results of the strength verification are shown in Figure A1 and Table A2. P
P=2×T
(7L,+3L2)
W——the maximum bending moment, kN·m (tf·cm); is the tensile strength, MPa,
P—is the external load on the pin, kN;
W—is the bending section modulus, cm3,
T——is the breaking load of the steel cable, kN.
Roller diameter
kN(tf)
254(26)
412(42)
550(56)
824(84)
1196(122)
1452(148)
1766(180)||tt ||kN-m(tf-cm)
1106.2(112.8)
2265.3(231.0)
3522.5(359.2)
6 165,4 (628.7)
9947.9 (1 014.4)
13200.7(1346.1)
16 283.9( 1660.5)bzxz.net
MPa(tf/cm2)
225.6(2.3)
235.4(2.4)
215.7 (2.2)
294.2 (3.0)| |tt||304.0(3.1)
333.4(3.4)
284.4(2.9)
Safety factor
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