💡 Key Features & Characteristics
Two-Step Braking (Soft Stop):
This is the defining feature of the "E...A" series. It allows the brake to apply in two distinct stages:
First Stage (Pre-Braking): The brake applies a reduced torque to decelerate the machinery to a "creep" speed.
Second Stage (Final Stop): After a set time or speed reduction, the brake applies full torque to bring the machine to a complete halt.
Benefit: This significantly reduces mechanical shock, prevents load sway in cranes, and extends the life of gearboxes and couplings.
Dual Electrical Control:
To achieve the two-step action, the thruster typically requires a specific control circuit (often involving two contactors or a control transformer) to switch between the "High Speed/Release" and "Low Speed/Braking" states.
Interlocking Equalizing Mechanism:
Like the standard YW series, this unit features a mechanical linkage that ensures both brake shoes retract and apply equally. This prevents uneven wear and heat buildup.
Visual Torque Adjustment:
The main compression spring is housed in a square tube with a graduated scale, allowing operators to easily read and adjust the final braking torque.
Maintenance-Free Linkage:
The main pivot points are equipped with self-lubricating bearings, eliminating the need for manual greasing.
🏭 Typical Applications
The YW-E300/E50A is used in applications where smooth deceleration is as important as the final stop:
Cranes & Hoists: Specifically for the hoisting mechanism to prevent the load from swinging when the brake is applied.
Belt Conveyors: Prevents the belt from tearing or slipping due to sudden stops (especially on long conveyors).
Stackers & Reclaimers: Reduces structural stress during emergency stops.
Mining Winches: Ensures smooth cable spooling.
📋 General Technical Specifications
表格
| Parameter | Description |
|---|---|
| Type | Two-Step (Dual-Speed) Electro-Hydraulic Drum Brake |
| Model Series | YW-E Series |
| Model Variant | YW-E300/E50A |
| Braking Torque | Approx. 3000 N·m |
| Actuator Model | E50A (Two-Step Variant) |
| Actuator Thrust | 500 N |
| Actuator Stroke | Typically 60 mm (Standard for E50 size) |
| Control Voltage | Often requires 220V AC or 380V AC control circuit (Check Nameplate) |
| Braking Stages | 2 (High Speed Release → Low Speed Braking → Stop) |
| Ambient Temperature | -20°C to +50°C |
Note: The E50A thruster is electrically different from a standard E50 thruster. It usually has additional wiring terminals (often 4 or 5 wires instead of the standard 3) to control the secondary braking stage. When replacing this unit, you must match the "Two-Step" (or "Soft Stop") specification; a standard thruster will not provide the two-stage braking function.
