🏗️ What is the YFX-400/80?
The YFX-400/80 is a Fail-Safe Electro-Hydraulic Brake. Unlike the drum or disc brakes you previously inquired about (MW, ZWZB, DCPZ), this device does not stop a rotating shaft. Instead, it is a linear actuator that drives a steel wedge under the crane's rail wheel.
Mechanism: It uses an electric hydraulic pusher (Ed series) to lift the wedge. When power is cut (or during a storm), powerful springs force the wedge down under the rail, physically blocking the wheel from rolling.
Model Meaning:
YFX: Electro-hydraulic Anti-Wind Wedge.
400: Indicates the frame size or the applicable wheel diameter range (approx. 400mm).
80: Indicates the stroke or the specific thrust rating (often related to the hydraulic cylinder size).12
📋 Key Specifications
表格
| Parameter | Specification | Notes |
|---|---|---|
| Model | YFX-400/80 | Part of the YFX Series Anti-Wind Wedges. |
| Power Supply | AC 380V / 50Hz | Standard industrial power (3-phase). |
| Protection Level | IP65 | Dust-tight and protected against water jets. |
| Operating Temp. | -20°C ～ +50°C | Suitable for most outdoor environments. |
| Friction Material | High-Strength Wear-Resistant Steel | Hardened alloy for durability. |
✨ Key Features
Based on the search results, here are the core characteristics of this device:
Fail-Safe Operation (Spring Applied):
The device is normally closed (applied). Springs force the wedge into the rail. The electro-hydraulic pump only operates to lift the wedge when the crane is moving. If power fails during a storm, the wedge automatically drops to secure the crane.12
High Protection (IP65):
Since these are used outdoors, the hydraulic cylinder and motor are sealed to IP65 standards to prevent rain, snow, and dust ingress.12
Self-Lubricating Hinges:
Similar to the MW and ZWZB series, the main pivot points use self-lubricating bearings. This ensures the mechanism moves smoothly even in harsh, dusty port environments without frequent maintenance.
Manual Release Function:
It features a manual release mechanism. This allows maintenance personnel to disengage the brake manually for inspection or in case of a power failure.
Status Indication:
It is equipped with a limit switch (行程开关). This provides an electrical signal to the crane's control system, confirming whether the wedge is fully released (allowing the crane to move) or fully applied (securing the crane). This creates a safety interlock.12
🏭 Typical Applications
The YFX-400/80 is exclusively used on large outdoor rail-mounted cranes, including:
Gantry Cranes (龙门起重机)
Portal Cranes (门座起重机)
Ship unloaders (卸船机)
Railway Cranes
💡 Safety Calculation Note
The search results provided a formula for determining how many of these units are needed per crane:
Holding Force (F): F=f×NF=f×N
ff = Friction coefficient (typically 0.46).
NN = Wheel pressure.
Quantity (S): S=2.5×Pw/FS=2.5×Pw/F
PwPw = Wind load acting on the crane.
Note: This device is often used in conjunction with anchor devices or cable winders for extreme weather protection.12
