The YFX electric hydraulic windproof iron wedge brake is an advanced safety device designed to secure cranes and heavy equipment against destructive high-wind events. Using a proven wedge mechanism that converts hydraulic force into massive clamping action, the YFX provides reliable storm protection for port cranes, gantry cranes, and rail-mounted equipment where wind-induced movement could cause catastrophic damage.
Featuring spring-applied, hydraulic-release operation and compatibility with standard crane hydraulic systems, the YFX wedge brake automatically engages when hydraulic pressure is lost—ensuring your multi-million dollar equipment remains secure during typhoons, power failures, and emergency situations.
Key Specifications at a Glance
| Parameter | Specification |
|---|---|
| Braking Force | Based on wheel pressure and friction coefficient |
| Friction Coefficient | μ = 0.46 |
| Operating Temperature | -20°C to +50°C |
| Power Supply | 3-phase AC380V, 50Hz |
| Standards | GB8755-2000 |
| Altitude | ≤ 2000m |
| Models | YFX-350/80, YFX-500/80, YFX-600/80, YFX-700/80, YFX-800/80 |
Why Choose YFX Windproof Wedge Brakes?
1. Superior Wedge Mechanism Design
The YFX uses a precision wedge mechanism that provides mechanical advantage for powerful clamping:
- Wedge angle multiplies hydraulic force for massive clamping action
- Self-locking design prevents release under vibration or shock loads
- Smooth engagement and release with hydraulic control
2. Wind Load Calculation
The YFX braking force is calculated using:
F = f × N
Where:
F = Braking force
f = Friction coefficient (μ = 0.46)
N = Wheel pressure (in Newtons)
The number of units required is calculated as:
S = (2.5 × Pw) / F
Where Pw = Wind load based on crane specifications
3. Spring-Applied Fail-Safe Design
The YFX employs spring-applied, hydraulic-release operation:
- Braking: Springs push wedge into locking position automatically
- Release: Hydraulic pressure lifts wedge to free the wheel
- Fail-Safe: Any pressure loss causes immediate wheel locking
4. Multiple Model Options
The YFX series offers models for different wheel sizes:
- YFX-350/80: For 350mm nominal wheel diameter
- YFX-500/80: For 500mm nominal wheel diameter
- YFX-600/80: For 600mm nominal wheel diameter
- YFX-700/80: For 700mm nominal wheel diameter
- YFX-800/80: For 800mm nominal wheel diameter
How YFX Wedge Brakes Work
Storm Protection Mode (Engaged)
When storm protection is needed:
- Hydraulic pressure is released or lost
- Spring force pushes the iron wedge between the wheel and a fixed stop
- The wedge locks the wheel in position through mechanical interference
- Wind forces cannot rotate the locked wheel
Operational Mode (Released)
When normal crane operation is required:
- Hydraulic pressure is applied to the release mechanism
- Hydraulic force overcomes spring pressure
- Wedge is withdrawn from the wheel path
- Wheel can rotate freely for crane travel
Primary Applications
Port & Terminal Cranes
The YFX is essential for port cranes including ship-to-shore (STS) cranes, rubber-tyred gantry (RTG) cranes, and mobile harbor cranes. These massive machines face extreme wind exposure in coastal environments and require reliable storm protection.
Gantry Cranes
Gantry cranes in steel mills, shipyards, and container terminals use YFX wedge brakes as part of their storm protection system. The wedge design provides positive wheel locking that mechanical disc brakes cannot match.
Heavy Construction Equipment
Tower cranes and other construction equipment use YFX brakes for storm securing in field conditions where wind exposure is high and power may be unreliable.
Storm Protection System Configuration
A complete crane storm protection system typically includes:
- Rail clamps (YDGZ-40 or YJGQ) – Primary anchor on the rail
- YFX wedge brakes – Wheel locking on non-drive wheels
- YLBZ wheel side brakes (optional) – Additional wheel arrestment on drive wheels
- Storm detection system – Wind speed monitoring triggering automatic engagement
YFX vs YLBZ vs Rail Clamps: Which Storm Protection Do I Need?
| Device | Function | Best For |
|---|---|---|
| Rail Clamps (YDGZ, YJGQ) | Direct rail grip, prevents crane travel | Primary storm anchor |
| YFX Wedge Brake | Locks wheel rotation mechanically | Non-drive wheel securing |
| YLBZ Wheel Brake | Hydraulic wheel tread braking | Drive wheel securing, service brake |
Recommendation: A complete storm protection system uses all three types. Rail clamps provide the primary anchor while YFX and YLBZ wheel devices prevent wheel rotation on all wheels.
Frequently Asked Questions
How is the YFX wedge brake different from a disc brake?
Unlike disc brakes that use friction on a rotating surface, the YFX uses a mechanical wedge that physically locks the wheel by inserting between the wheel and a fixed stop. This wedge mechanism provides positive, self-locking engagement that cannot slip—even if friction is compromised by contamination. YFX is designed for storm protection (infrequent engagement) rather than high-cycle service braking.
How do I calculate how many YFX brakes my crane needs?
Use the formula: S = (2.5 × Pw) / F, where S is the number of units, Pw is the wind load on your crane (calculated from crane dimensions and local wind speed requirements), and F is the braking force per unit (F = f × N, where f = 0.46 and N = wheel pressure). Our engineering team can help you perform these calculations for your specific crane model and location.
What happens to YFX brakes during a power failure?
This is a key safety feature. The spring-applied design means that ANY loss of hydraulic pressure—including power failure, hose rupture, or pump failure—causes the wedge to immediately engage and lock the wheel. Your crane becomes MORE secure during the power failure. This fail-safe behavior is essential for storm protection applications.
Can YFX brakes be used for regular service braking?
YFX wedge brakes are designed primarily for storm protection and emergency situations, not for high-frequency service braking. For regular wheel braking during crane operation, consider YLBZ hydraulic wheel side brakes which are designed for frequent engagement cycles. YFX should only be engaged during parking, maintenance, or storm conditions.
What maintenance does YFX require?
YFX wedge brakes require minimal maintenance due to their infrequent engagement nature: (1) Quarterly visual inspection for wear and secure mounting, (2) Manual test engagement annually to verify spring function, (3) Check hydraulic system for leaks and proper pressure, (4) Inspect wedge surfaces for wear or damage after any storm event.
Related Products & Storm Protection System
Complete your crane storm protection system with these complementary products:
- YDGZ-40 Heavy Duty Hydraulic Rail Clamp – Primary storm anchor (400 KN clamping force)
- YJGQ Hydraulic Rail Clamp – Versatile rail clamp available in 160-600 KN ratings
- YLBZ Series Hydraulic Wheel Side Brake – Drive wheel braking for complete wheel coverage
- YWZ13 Series Electric Hydraulic Drum Brake – Hoist and travel drum brakes for port cranes
Request a Quote for YFX Windproof Wedge Brakes
Get the storm protection your port equipment demands. Our engineering team can help you select the optimal YFX models and design a complete storm protection system for your specific crane configuration and local wind requirements.
Contact us today to discuss your storm protection requirements, request wind load calculations, or receive a detailed quotation for YFX windproof wedge brakes and complete brake systems.
