The DYTPF700-S/110 Series is a modern, compact, and high-thrust electro-hydraulic linear actuator, commonly referred to as an "electro-hydraulic pusher" or thruster. It is designed to provide powerful, reliable, and maintenance-free operation for industrial braking and actuation systems, representing an advancement over older oil-immersed thruster designs.
Core Operating Principle
It operates on a self-contained, closed electro-hydraulic system. A built-in motor drives a high-pressure hydraulic pump. The pump pressurizes hydraulic fluid, which acts directly on a piston to generate a powerful linear thrust. When de-energized, a powerful internal spring (or the external brake spring) returns the piston, ensuring fail-safe, spring-applied operation. The "S" in the model typically denotes this spring-return design.
Key Features & Design Characteristics
Dry-Design / Oil-Separated Construction: This is a key modern feature. Unlike older oil-immersed thrusters, the motor and electrical components are completely isolated from the hydraulic oil chamber. This eliminates issues of oil degrading motor insulation, extends component life, and allows for the use of special high/low-temperature hydraulic fluids.
Extremely High Thrust: The "700" signifies a very high thrust rating, often in the range of 7000 Newtons (N) or approximately 700 kgf, making it suitable for heavy-duty and high-torque brakes.
Long Stroke: The /110indicates a standard piston stroke of 110mm, providing a long actuation distance for large air-gap brakes or other applications requiring significant movement.
Compact and Integrated Design: Engineered for a high power-to-size ratio, allowing for installation in space-constrained areas. The hydraulic power unit, cylinder, and spring-return mechanism are fully integrated.
Low Maintenance: The sealed hydraulic system is typically maintenance-free for the life of the unit under normal conditions, with no need for regular oil changes or pump adjustments.
Smooth and Quiet: Hydraulic actuation ensures cushioned, vibration-free movement, minimizing mechanical shock.
Typical Technical Data
Thrust Force: Approximately 7000 N (or ~700 kgf).
Stroke: 110 mm.
Power Supply: Standard 3-phase AC (e.g., 400V/415V, 50Hz or 480V, 60Hz).
Motor Power: Typically in the range of 1.1 kW to 1.5 kW, optimized for efficient operation.
Duty Cycle: Rated for high duty cycles, often up to 100% for certain models, allowing for continuous or frequent use.
Protection Class: High IP rating (e.g., IP65) is common, providing excellent protection against dust and water ingress.
Primary Application
It is specifically engineered as a high-performance actuator for fail-safe industrial brakes:
Heavy-Duty Overhead Cranes and Gantry Cranes: For main hoist, bridge, and trolley brakes.
Shipbuilding and Offshore Cranes.
Mining Hoists (Winders) and Large Conveyor Drives.
Test Benches and Heavy Process Machinery.
Any application requiring a high thrust, long stroke, and reliable spring-return action.
Advantages over Traditional Oil-Immersed Thrusters
Higher Reliability: Separation of electrical and hydraulic compartments prevents oil-related motor failures.
Wider Temperature Tolerance: Can use specialty hydraulic fluids for extreme environments (very high or low temperatures).
Maintenance-Free Operation: No regular oil maintenance is required.
Enhanced Safety & Longevity: Modern seals and materials reduce the risk of leaks and degradation.
Summary
The DYTPF700-S/110 Series Electro-hydraulic Pusher is a high-end, heavy-duty actuator designed for the most demanding industrial braking applications. Its 110mm stroke and 7000N thrust, combined with its modern dry-design construction, offer superior performance, reliability, and a maintenance-free lifespan compared to classic oil-immersed thrusters, making it the preferred choice for modern heavy machinery and crane systems.
