1. Core Function & Working Principle
The YFX series is a fail-safe (normally closed) device used specifically for anti-wind protection on rail-mounted cranes.
Operation (Power On): When the power is ON, the electric-hydraulic pusher (ED80/6WS type) activates. The piston rod rises, pulling the lever mechanism to lift the iron wedge away from the rail, allowing the crane to travel.
Braking (Power Off): When the power is cut (e.g., during a storm or emergency stop), the hydraulic pressure drops. A built-in spring forces the pusher rod to descend, driving the iron wedge firmly onto the rail track. This wedges the crane wheel in place, preventing movement.
Key Feature: The design often includes a delay valve to ensure the iron wedge lowers slowly to avoid impact shocks.
2. Decoding the Model Number: YFX-800/80
YFX: Series designation for Electric-Hydraulic Windproof Iron Wedge.
800: Indicates the wheel diameter (in mm) of the crane it is designed to fit. This unit is for cranes with 800mm wheels.
80: Refers to the thrust (pushing force) specification of the配套 (配套) electric-hydraulic pusher (typically an ED80 series pusher).
3. Key Technical Specifications
表格
| Parameter | Specification for YFX-800/80 |
|---|---|
| Type | Electric-Hydraulic / Fail-Safe (Spring Applied) |
| Wheel Diameter | 800 mm |
| Matching Pusher | ED80/6WS (or similar ED80 variant) |
| Protection Level | IP65 (Dust tight and protected against water jets) |
| Power Supply | AC 380V / 50Hz (Standard industrial 3-phase) |
| Weight | Approx. 129 kg (Reference based on similar series data) |
| Friction Block | High-hardness, wear-resistant steel |
4. Key Features
Automatic Wedging: The mechanism automatically locks the crane wheel against the rail when power is lost, providing a mechanical safety backup.
Interlocking Capability: It can be electrically interlocked with the crane's travel mechanism. This ensures the crane cannot move unless the iron wedge is fully lifted.
Robust & Sealed: The use of self-lubricating bearings at hinge points and the IP65 rated pusher ensures longevity in harsh outdoor environments (dust, rain, snow).
Manual Release: Equipped with a manual release handle for maintenance or emergency operation when power is unavailable.
State Indication: Often includes a limit switch to provide a signal indicating whether the wedge is "lifted" (ready to run) or "down" (braked).
5. Typical Applications
The YFX-800/80 is primarily used on large-scale outdoor machinery:
Rail-Mounted Gantry Cranes (RMG): For ports and container yards.
Portal Cranes & Loading Bridges: Used in shipyards and bulk material handling.
Outdoor Overhead Cranes: In steel mills or storage yards exposed to wind.
