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YWZ9-800/E301 Series Electro-hydraulic Drum Brakes

The YWZ9-800/E301 is a specific heavy-duty model within the YWZ9 Series of Electric Hydraulic Drum Brakes . It is designed for high-inertia applications requiring significant braking torque, such as large cranes and mining equipment. Here is a detailed breakdown of this specific model based on...

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Description

The YWZ9-800/E301 is a specific heavy-duty model within the YWZ9 Series of Electric Hydraulic Drum Brakes. It is designed for high-inertia applications requiring significant braking torque, such as large cranes and mining equipment.

Here is a detailed breakdown of this specific model based on standard technical specifications for the YWZ9 series:

🛠️ Product Overview: YWZ9-800/E301

This brake is a fail-safe (normally closed) device, meaning it automatically applies when power is cut. It utilizes an Ed301 electric hydraulic pusher to overcome the spring force and release the brake.

Model Decoding:

YWZ9: Series designation (Improved electric hydraulic drum brake).

800: Brake frame size, indicating it is designed to fit a 800 mm diameter brake wheel.

E301: Drive mechanism code, specifying the use of an Ed301/6 electric hydraulic pusher.

📋 Key Technical Specifications

Parameter	Specification	Notes
Brake Wheel Diameter	800 mm	Standard drum size.
Driving Device	Ed301/6	Electro-hydraulic pusher.
Rated Thrust	3000 N	Force generated by the pusher.
Rated Stroke	60 mm	Standard stroke for the Ed301/6.
Braking Torque	Up to 12,500 N·m	Adjustable via spring compression.
Power Supply	380V / 660V, 50Hz	Standard industrial 3-phase power.
Operating Temperature	-20°C ～ +50°C	Can be customized for extreme cold.

✨ Key Features

Interlocking Equal Clearance Device:
This is a defining feature of the YWZ9 series. It ensures that the gap (air gap) between the brake shoes and the brake wheel remains equal on both sides automatically. This prevents one-sided wear and ensures the brake releases cleanly without dragging.

High-Efficiency Drive (Ed301):
The Ed301 pusher provides strong thrust and long stroke capabilities. It features an asynchronous motor design, which is gearless and requires less maintenance compared to older capacitor-start models.

Plug-in Brake Lining:
The friction pads use a card-mounted plug-in design. This allows for very fast replacement without removing the brake from the shaft, reducing downtime.

Self-Lubricating Hinges:
All major swing points are fitted with self-lubricating bearings. This eliminates the need for external greasing during routine maintenance, ensuring smooth operation even in dusty environments.

Visual Torque Adjustment:
The brake spring is housed inside a square tube with a scale ruler. This allows technicians to visually set and verify the spring force (and thus the braking torque) without complex calculations.