YZB20-20 Hydraulic Power Unit

YZB20-20 hydraulic power unit

The YZB20-20 is a compact Hydraulic Power Unit (HPU) designed to provide the hydraulic pressure required to operate electro-hydraulic thrusters, rail clamps, and other hydraulic actuators. It serves as the "heart" of a hydraulic braking or clamping system, converting electrical energy into hydraulic energy.

The model number typically indicates:

YZB: The series designation for Hydraulic Power Units (often used for crane safety devices).

20 (First part): The Rated Flow of 20 L/min (Liters per minute).

20 (Second part): The Rated Pressure of 20 MPa (Megapascals, approx. 200 bar).

This unit is typically used to drive multiple hydraulic brakes or clamps simultaneously on a single machine (e.g., a large gantry crane).

💡 Key Features & Characteristics

Compact & Integrated Design:
The YZB series is designed as a "mini" power station. It integrates the electric motor, hydraulic pump, oil tank, and control valves into a single, space-saving unit.

High-Pressure Output:
Capable of generating up to 20 MPa of pressure, making it suitable for high-force applications like wind wedges and rail clamps.

Fail-Safe Capability (Accumulator Option):
For safety-critical applications (like storm brakes), the YZB unit is often equipped with a hydraulic accumulator.

Function: The accumulator stores hydraulic energy. If the main power fails, the stored pressure can be used to release the brakes momentarily or maintain clamping force, ensuring the machine doesn't get stuck or drift.

Customizable Control Logic:
The unit can be equipped with various valve configurations (solenoid valves, check valves, relief valves) to control the direction of flow (open/close) and pressure limits.

Environmental Protection:
Designed for industrial environments, the electrical components (motor, junction box) typically feature IP55 protection ratings to resist dust and water spray.

🏭 Typical Applications

The YZB20-20 is primarily used as the power source for safety braking systems:

Port Machinery: Powering rail clamps (YJGQ series) and wind wedges (YFX series) on ship-to-shore cranes and RMGs.

Metallurgical Cranes: Operating multiple wheel-side brakes (YLZ series) simultaneously.

Mining & Construction: Driving hydraulic actuators for heavy gates or conveyors.

Wind Power: Pitch control systems (hydraulic variants).

📋 General Technical Specifications

Note: The YZB series is often customized. While the "20-20" indicates the core pump performance (Flow/Pressure), the physical size, tank volume, and valve manifold configuration can vary based on the specific crane or machinery requirements. Always check the hydraulic schematic diagram for the exact port connections.

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