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Elevator 9 × 21Fi-PWRC
A company specializing in the production, research and development, and sales of steel wire ropes. It develops and produces supporting services for elevator rope manufacturers, focusing on 6 * 19 steel wire ropes. At the
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电梯专用 9×21Fi-PWRC 钢丝绳是针对中高速、中载重电梯（如小高层住宅电梯、商用轻型载货电梯、医用电梯）曳引系统研发的高抗旋转、低噪音特种钢丝绳，符合 GB 8903-2018《电梯用钢丝绳》 标准，适配运行速度 1.5~3.5m/s、提升高度 50~200m 的电梯工况，尤其适合对运行平稳性、静音效果和维保便捷性要求较高的场景。
一、型号含义拆解（电梯工况专属优化）
型号部分 含义说明 9 外层9 个工作股，采用多层对称紧密排列设计，相比 8 股结构抗旋转性能提升 35%，旋转扭矩≤0.16 N・m/100m，可有效抑制中高速电梯启停、加减速时的绳体扭转，避免轿厢偏摆、异响，保障运行平稳性 ×21Fi K 型压实填充式瓦林吞股（Fi=Filled 填充结构），每股由 21 根粗细分级的钢丝分层排布，中心粗钢丝外环绕细钢丝并填充间隙；经电梯专用精密冷压实工艺处理后，股内钢丝为面接触，间隙≤0.007mm，抗弯曲疲劳性能比普通点接触股提升 50%，适配曳引轮高频次往复弯曲工况，且绳体轻量化优势突出 -PWRC 电梯专用聚氨酯填充压实钢丝绳芯，由 7×19 紧凑型钢芯压实后，芯部填充高弹性聚氨酯（PU）材料，兼具独立钢芯（IWRC）的高径向支撑性与塑料芯的缓冲减振性；抗蠕变性能比普通 IWRC 提升 30%，解决中高层电梯悬挂时长导致的绳体伸长、平层精度漂移问题 二、电梯专用核心技术参数
参数项 详细说明 结构组成 9 个压实填充式瓦林吞外层股 + 聚氨酯填充压实钢丝绳芯；采用外层右捻 + 绳芯左捻的交叉捻工艺，股间间隙≤0.02mm，绳体圆整度≥98.8%，与曳引轮槽贴合度达 98% 以上 钢丝材质 电梯专用特级高碳钢（#82B 精炼级），抗拉强度波动≤25MPa，屈强比≥0.92，耐疲劳次数≥3.5×10⁶次（弯曲半径 D=10d），满足中高速电梯高频次启停的疲劳寿命需求 表面处理 1. 镀锌磷化复合处理：先磷化（增强润滑脂吸附性）后热镀锌（镀层厚 32~45μm），盐雾试验≥600h 无红锈，适配潮湿机房、半户外电梯场景2. 光面浸电梯专用中高速曳引脂：涂覆高粘附性、低摩擦降噪型曳引脂，摩擦系数稳定在 0.07~0.08，减少曳引轮磨损与运行噪音3. 锌铝合金镀层：耐腐蚀性为纯锌镀层的 4 倍，适配沿海地区小高层电梯 直径范围 常见 10~18mm（中高速中载重电梯主流规格），适配曳引轮深 U 型槽 公称抗拉强度 1770MPa（电梯专用优选等级），兼顾高强度与高韧性，抵御中高速启停的冲击载荷，杜绝钢丝脆断 最小破断拉力系数 ≥0.42（满足 GB 8903-2018 强制要求），配套电梯安全系数≥14，满足 125% 超载工况的安全冗余需求 蠕变伸长率 ≤0.05%（额定载荷下运行 10⁴次），确保中高层电梯平层精度≤±1.0mm 运行速度适配 最大适配电梯运行速度 3.5m/s，满足小高层住宅、商用电梯的运输需求 三、典型性能表（1770MPa 镀锌磷化 + 中高速曳引脂）
公称直径（mm） 参考重量（kg/100m） 最小破断拉力（kN） 适配电梯类型 10 45 40.0 医用电梯、杂物电梯（载重 1t） 14 90 82.0 小高层住宅电梯（速度 2.0m/s） 18 155 145.0 商用轻型载货电梯、观光电梯（速度 3.5m/s） 四、中高速电梯工况核心特性
- 轻量化低噪音，提升乘坐舒适度21 丝填充式股结构相比 25 丝型号重量减轻 10%~15%，可降低曳引机负载；PU 芯部缓冲减振设计配合面接触钢丝结构，电梯运行噪音≤43dB（额定速度 2.5m/s），远超民用电梯静音标准。
- 高抗旋转稳运行，适配中高层工况9 股对称结构 + 交叉捻工艺，抗旋转性能优于传统 8 股钢丝绳，电梯在满载 / 空载切换、加减速运行时，轿厢摆动幅度≤±3mm，无明显晃动，尤其适合医用电梯的平稳运输需求。
- 耐疲劳长寿命，降低维保成本面接触压实工艺消除股内钢丝微动摩擦，配合 PU 芯的抗蠕变性能，钢丝绳使用寿命比普通 8 股电梯绳延长 60%~70%；中高层电梯换绳周期可延长至 7~8 年，减少高空换绳的人工与设备成本。
- 高性价比，适配批量采购场景相比 25 丝大载重型号，21 丝结构生产成本更低，同时满足中高速中载重电梯的性能需求，适合住宅小区、商业综合体等批量电梯项目的采购。
五、电梯专用选型与维保要点
- 选型匹配要求
- 绳径与曳引轮直径比需满足 d/D ≤ 1/45（中高速电梯强化要求，高于 GB 7588-2020 标准的 1/40），避免绳体过度弯曲导致疲劳断丝
- 槽型匹配：10~14mm 绳径适配深 U 型槽，18mm 绳径适配加宽深 U 型槽，提升曳引力，杜绝高速运行打滑
- 严禁用通用 9×21Fi-PWRC 替代电梯专用型号，两者耐疲劳性能、抗旋转性能差异显著
- 维保关键事项
- 润滑管理：仅可使用电梯专用中高速曳引脂，禁止使用普通钢丝绳润滑脂（易高温流失、引发打滑）；脂层厚度保持 0.2~0.25mm，补脂周期建议为 10 个月 / 次
- 报废判定：出现以下情况立即更换（符合 GB 8903-2018）：① 单股断丝数≥2 根；② 绳径磨损≥4%；③ 钢丝绳出现锈蚀、变形、松股、跳丝
- 更换周期：建议每 7~8 年强制更换（或运行里程达 70 万 km），中高层电梯换绳需采用专业高空作业设备，避免绳体弯折损伤
需要我帮你整理电梯专用 9×21Fi-PWRC 与 9×25Fi-PWRC 的性能对比表吗？电梯专用钢丝绳9×21Fi-PWRC的破断拉力是多少？电梯专用钢丝绳9×21Fi-PWRC的市场价格是多少？电梯专用钢丝绳9×21Fi-PWRC的使用寿命有多长？
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common problem
Q
What kind of lubricant can prevent wire rope damage?
A
First, the smooth oil has good fluidity and soaking ability, allowing it to quickly enter the inside of the rope and the rope core when the wire rope is smooth pretreated, and can play a role in preventing bacteria from multiplying inside the rope core fibers.
Second, the lubricating oil adhered to the wire rope will not be easily wiped off, and the smoothing effect will not be affected within the specified temperature range. In addition, the lubricating oil with adhesive function can also prevent skid, which provides assistance for the friction of the elevator wire rope.
Third, it has a high oil film strength, which can resist the extremely high pressure between the steel wires in contact with each other under extremely heavy load, and can also resist decomposition and transformation.
Fourth, smooth oil has high cohesion, which can avoid the dripping of smooth oil, centrifugal loss when there is no exercise, and avoid grease waste and pollution to other equipment.
Fifth, it does not contain ingredients that can cause corrosion and rust in the steel wire rope, and the effect of anti-corrosion and anti-rust is better.
Sixth, its self-correcting ability is strong. When the wire rope is used, it constantly twists and turns, which will cause the surface oil film to continuously knead and expand. This requires a soft and high-temperature oil film to maintain the rope body from cracking.
Second, the lubricating oil adhered to the wire rope will not be easily wiped off, and the smoothing effect will not be affected within the specified temperature range. In addition, the lubricating oil with adhesive function can also prevent skid, which provides assistance for the friction of the elevator wire rope.
Third, it has a high oil film strength, which can resist the extremely high pressure between the steel wires in contact with each other under extremely heavy load, and can also resist decomposition and transformation.
Fourth, smooth oil has high cohesion, which can avoid the dripping of smooth oil, centrifugal loss when there is no exercise, and avoid grease waste and pollution to other equipment.
Fifth, it does not contain ingredients that can cause corrosion and rust in the steel wire rope, and the effect of anti-corrosion and anti-rust is better.
Sixth, its self-correcting ability is strong. When the wire rope is used, it constantly twists and turns, which will cause the surface oil film to continuously knead and expand. This requires a soft and high-temperature oil film to maintain the rope body from cracking.
Q
What are the classifications of wire ropes?
A
1, electric hoist wire rope: 6 * 37 + FC- 11/13/15/17.5
2, tower crane wire rope and multi-strand non-rotating wire rope: 6 * 19 + FC- 12/12.5, 6 * 37-13/14, 6 * 29FI + FC- 12/12.5, 4v39s + 5FC- 12/13/14, 35W * 7-12/13/14
3, car crane does not rotate wire rope: 4V39S + 5FC- 10/12/13/14/16/17, 35W * 7-10/12/13/14/15/16/17/18/20/22
4, pile driver flat wire rope: K6K36WS + IWR-/17.5/24/26/28/30/32/34/36/40/42/46
5, rotary excavator flat wire rope: 35W * K7- 24/26/28/30/32/36/40
6, dock crane wire rope: 6 * 36WS + IWR- 17.5/19 5/21.5/24/26
7, mine wire rope 6 * 19 + FC- 12.5/14/15.5/17/18.5/21 5/24.5/26/28, 6 * 19S + FC- 12.5/14/15.5/17/18.5/21 5/24.5
8, elevator wire rope: 8 * 19S + FC- 10/11/12/13/16
9. Hot-dip galvanized hanging basket wire rope: 4 * 31WS + PPC- 8.3/8
10. Hot-dip galvanized wire rope: 6 * 19/6 * 37/6 * 36WS/8 * 61/8 * 36WS/
11, galvanized wire rope: 6 * 7 + FC-/2/3/4
6 * 19 + FC-5/6/7 7/9.3/11, 6 * 12 + 7FC-5/6/7. 7/9.3/11, 7 * 19-5/6/8/10, 19 * 7-4/5/6/8/10, 6 * 37 + FC-8.7/9 3/11/13/15/17.5/19.5
12. Large diameter wire rope: above 60MM
13. Wire rope rigging (insertion, pressing, pouring, connectors, etc.):
14, coated wire rope: 2-3/3 - 4/4-5/5-6/6 - 8/8-12/12-15
15, binding wire rope: 6 * 12/6 * 15-13/14/15
The front represents the structure, and the back represents the diameter. For example: 6 * 37 + FC-11, the representative structure is 6 * 37 + FC, diameter: 11MM
2, tower crane wire rope and multi-strand non-rotating wire rope: 6 * 19 + FC- 12/12.5, 6 * 37-13/14, 6 * 29FI + FC- 12/12.5, 4v39s + 5FC- 12/13/14, 35W * 7-12/13/14
3, car crane does not rotate wire rope: 4V39S + 5FC- 10/12/13/14/16/17, 35W * 7-10/12/13/14/15/16/17/18/20/22
4, pile driver flat wire rope: K6K36WS + IWR-/17.5/24/26/28/30/32/34/36/40/42/46
5, rotary excavator flat wire rope: 35W * K7- 24/26/28/30/32/36/40
6, dock crane wire rope: 6 * 36WS + IWR- 17.5/19 5/21.5/24/26
7, mine wire rope 6 * 19 + FC- 12.5/14/15.5/17/18.5/21 5/24.5/26/28, 6 * 19S + FC- 12.5/14/15.5/17/18.5/21 5/24.5
8, elevator wire rope: 8 * 19S + FC- 10/11/12/13/16
9. Hot-dip galvanized hanging basket wire rope: 4 * 31WS + PPC- 8.3/8
10. Hot-dip galvanized wire rope: 6 * 19/6 * 37/6 * 36WS/8 * 61/8 * 36WS/
11, galvanized wire rope: 6 * 7 + FC-/2/3/4
6 * 19 + FC-5/6/7 7/9.3/11, 6 * 12 + 7FC-5/6/7. 7/9.3/11, 7 * 19-5/6/8/10, 19 * 7-4/5/6/8/10, 6 * 37 + FC-8.7/9 3/11/13/15/17.5/19.5
12. Large diameter wire rope: above 60MM
13. Wire rope rigging (insertion, pressing, pouring, connectors, etc.):
14, coated wire rope: 2-3/3 - 4/4-5/5-6/6 - 8/8-12/12-15
15, binding wire rope: 6 * 12/6 * 15-13/14/15
The front represents the structure, and the back represents the diameter. For example: 6 * 37 + FC-11, the representative structure is 6 * 37 + FC, diameter: 11MM
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