What pulleys are used for cranes
Cranes are indispensable heavy machinery in construction sites, port loading and unloading and large-scale equipment handling. As an important part of the crane, the pulley directly affects its working efficiency and safety. This article will analyze structured data such as the type, material, application scenarios of crane pulleys, and combine them with popular topics on the entire network in the past 10 days to provide you with a comprehensive guide.
1. Main types of crane pulleys
Crane pulleys can be divided into the following categories according to their purpose and structure:
| type | Features | Applicable scenarios |
|---|---|---|
| Fixed pulley | Fixed position, change the direction of force | Tower cranes, bridge cranes |
| Moving pulley | Move with load, saving effort | Car cranes, crawler cranes |
| Guide pulley | Guide the direction of the wire rope | Port crane |
| Balance pulley | Adjust the tension of multiple wire ropes | Large gantry crane |
2. Comparison of pulley material and performance
Pullaxes of different materials are suitable for different working conditions:
| Material | Wear resistance | weight | cost | Applicable loads |
|---|---|---|---|---|
| cast iron | medium | Heavier | Low | ≤50 tons |
| Cast steel | high | Heavy | middle | 50-200 tons |
| Aluminum alloy | Low | light | high | ≤10 tons |
| Nylon composite material | medium | Very light | Higher | ≤5 tons |
3. Recent industry hotspots and technical trends (next to 10 days)
1.Intelligent pulley monitoring system: A heavy industry company launched a pulley with built-in sensors, which can monitor wear status in real time, and the number of readings on related topics exceeds 2 million.
2.The breakthrough in domestic production of super-large pulley sets: The casting integrated pulley with an 8-meter diameter passed the acceptance, broke the foreign monopoly, and topped the hot search list of engineering machinery.
3.Environmentally friendly materials applications: The test data of biomass composite pulleys was released, and the weight was reduced by 30% while maintaining strength, which triggered industry discussion.
4. Precautions for selecting pulleys
1.Match the diameter of the wire rope: The diameter of the pulley should be 20-30 times the diameter of the wire rope
2.Consider speed factor: High-speed working conditions (>50rpm) must use bearing structure
3.Anti-corrosion requirements: Stainless steel or special coating products are required in the marine environment
4.Safety factor: The safety factor of pulleys in general lifting equipment should not be less than 5
5. Maintenance points
| Maintenance project | cycle | Standard requirements |
|---|---|---|
| Lubrication inspection | Each shift | Make sure the grease covers the bearing part |
| Wear detection | per month | Groove depth wear ≤10% original size |
| Radial jump test | Quarterly | ≤0.5mm/100mm diameter |
| Non-destructive injury detection | each year | No crack defects |
Conclusion:With the concentrated start of infrastructure projects in the fourth quarter of 2023, the market demand for crane pulleys continues to grow. Correct selection and maintenance of pulley systems can not only improve operating efficiency, but also be an important guarantee for safe production. It is recommended that users pay attention to new industry technology trends regularly and choose the optimal configuration plan based on their own working conditions.
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