**1. Product Features**
✅ **Extreme Environment Adaptability**: Operates within a wide temperature range of -40°C to +80°C (optional heating/insulation design available).
✅ **Corrosion Resistance**: Stainless steel piston rod (such as 1Cr17Ni2) + special surface treatment (ceramic coating).
✅ **Long-life Sealing**: Utilizes **hydrogenated nitrile butadiene rubber (HNBR) or fluoroelastomer (FKM)**, resistant to aging.
✅ **Low Friction Technology**: Optimized sealing structure reduces starting torque (suitable for low wind speed pitch control requirements).
✅ **Modular Maintenance**: Some models support **seal replacement without disassembly**, reducing maintenance costs.
✅ **Intelligent Monitoring**: Optional **displacement/pressure sensors** for remote status monitoring.
**2. Main Types and Functions**
| **Type** | **Function** | **Typical Installation Location** |
| **Pitch Cylinder** | Adjusts blade angle to control power generation | Inside the hub, connected to the pitch bearing |
| **Yaw Brake Cylinder** | Drives the brake caliper to lock the nacelle position | Around the yaw brake disc |
| **Main Shaft Locking Cylinder** | Fixes the main shaft during maintenance to prevent rotation | Main shaft bearing housing |
| **Hydraulic Brake Cylinder** | Emergency braking or shutdown protection (redundant design required) | Near the high-speed shaft or gearbox |
**3. Typical Technical Parameters**
| **Parameter** | **Pitch Cylinder** | **Yaw Brake Cylinder** | |------------------|--------------------------|--------------------------|
| **Bore/rod diameter** | Φ50mm~Φ150mm | Φ25mm~Φ80mm |
| **Stroke** | 100mm~500mm | 10mm~50mm |
| **Working pressure** | 16MPa~21MPa | 10MPa~16MPa |
| **Temperature range** | -40℃~+80℃ | -30℃~+60℃ |
| **Sealing material** | HNBR (polyurethane for low-temperature type) | FKM (high-temperature resistant type) |
| **Protection grade** | IP67 (anti-salt spray) | IP65 |
**4. Wind Power Cylinders vs. Industrial General-Purpose Cylinders**
| **Comparison Item** | **Wind Power Hydraulic Cylinders** | **Industrial General-Purpose Cylinders** |
| **Environmental Adaptability** | Low-temperature resistance, salt spray resistance, and vibration resistance | Conventional temperature and humidity environment |
| **Service Life Requirement** | ≥20 years (1 million cycles) | 5-10 years (500,000 cycles) |
| **Maintenance Convenience** | Maintenance design without disassembly | Requires overall disassembly |
| **Safety Level** | SIL3/PLd (Functional safety certification) | No special requirements |
| **Cost** | Higher (material and certification costs) | Lower |
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