### **Product Introduction of Double-End Double-Action Lifting Cylinder**
#### Product Overview
The double-ended double-acting lifting cylinder is a high-performance
Hydraulic Actuator with **bidirectional synchronous drive**, featuring a **symmetrical structure with double piston rods**. It can achieve bidirectional uniform speed and equal thrust movement. Specifically designed for industrial scenarios that require **precise synchronous lifting and large-tonnage balanced lifting**, it is widely used in metallurgical equipment, heavy machinery, special vehicles, and other fields.
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### **Core Advantages**
1. **Bidirectional Balanced Drive**
- Dual piston rods extend/retract synchronously, with consistent bidirectional thrust
- Lift speed deviation ≤ 3% (Precision guiding system)
- Built-in pressure equalizing valve eliminates the impact of uneven loading
2. **Overload Structure Design**
- Utilizes **42CrMo alloy steel cylinder**, with rated pressure of 21-35 MPa
- Piston rod undergoes **high-frequency quenching + hard chromium plating** (hardness HRC60+)
- Four-corner guide band design, enhancing lateral force resistance by 50%
3. **Intelligent Control Interface**
- Optional built-in magnetostrictive displacement sensor (accuracy ±0.05mm)
- Supports CANopen/Profibus communication protocols
- Equipped with a buffer regulating valve, with programmable control of end speed
4. **Long-lasting Sealing System**
- Imported brand combination seal (Parker PolyPak)
- Triple dust protection (metal scraper ring + polyurethane lip seal + labyrinth structure)
- Design life ≥ 1 million cycles
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### **Technical Parameters**
| Item | Standard Series | Heavy Duty Series | |---------------|---------------------|---------------------|
| **Bore Diameter** | Φ63-160mm | Φ200-400mm |
| **Rod Diameter** | Φ32-90mm | Φ110-220mm |
| **Stroke** | 100-2000mm | 500-5000mm |
| **Working Pressure** | 21MPa | 35MPa |
| **Push/Pull Force** | 65-500kN | 300-3000kN |
| **Speed Range** | 0.1-0.5m/s | 0.05-0.3m/s |
| **Temperature Range** | -20℃~+80℃ | -30℃~+120℃ |
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### Typical Applications
- **Metallurgical Industry**: Elevation of the sector segments in continuous casting machines, roll changing devices for rolling mills
- **Construction Machinery**: Thrust system for shield machines, lifting platforms for wind turbine installation
- **Special Vehicles**: Leveling of missile launch vehicles, elevation of loading platforms for heavy transport vehicles
- **Industrial Production Lines**: Large mold flipping machines, balancing systems for presses
- **Energy Equipment**: Fuel rod grasping mechanisms in nuclear power plants
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### **Selection Guide**
1. **Load Calculation**:
- Both push and pull force requirements need to be verified simultaneously.
- For shock conditions, it is recommended to take a safety factor of 1.5 to 2.
2. **Installation Methods**:
- Earring Installation (Allowing Swinging)
- Flange Installation (High Rigidity Requirement)
- Customized Support (Special Space Constraints)
3. **Control Requirements**:
- Standard Type: Solenoid valve control
- Precision Type: Servo proportional valve + position feedback
- Synchronous Type: Multi-cylinder linkage control system
4. **Environmental Adaptation**:
- High-temperature environment: Heat-resistant seal (FFKM)
- Corrosive environment: Stainless steel cylinder body + ceramic coating
- Explosion-proof requirement: ATEX-certified version
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### **Maintenance Plan**
1. **Daily Maintenance**:
- Inspect the surface condition of the piston rod weekly.
- Measure the synchronization accuracy monthly.
2. **Regular Maintenance**:
- Replace the hydraulic oil filter element every 2,000 hours.
- Check for seal wear every 5,000 hours.
3. **Troubleshooting**:
- Out-of-sync → Check the pressure equalizing valve/sensor.
- Leakage → Replace the main seal assembly.
- Abnormal noise → Check the gap of the guide belt.
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### **Value-added Services**
- Provide **FEA Stress Analysis Report**
- Optional **Predictive Maintenance System** (Vibration + Temperature Monitoring)
- Support **Full Lifecycle Management** (10-year Warranty Plan)
- 72-hour Emergency Delivery Service
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