YT1 Series Electro-hydraulic Thruster YT1-18ZB/2

 

 

1. Working Principle

The thruster integrates a three-phase AC motor, hydraulic pump, cylinder, reservoir, and piston push rod into one unit. It completes linear thrust output and reset through "electric-hydraulic drive + spring reset," with the working process divided into two core stages:

1.1 Thrust Output (Power-On Stage)

When connected to the rated power supply (common voltage: 380V AC), the built-in three-phase asynchronous motor starts, driving the integrated gear pump to rotate at high speed.

The hydraulic pump draws anti-wear hydraulic oil (ISO VG46) from the built-in reservoir, pressurizes it to 8–12 MPa, and delivers it to the single-acting hydraulic cylinder.

Hydraulic pressure pushes the piston and the connected push rod to extend linearly, outputting a rated thrust of 18 kN. The push rod travels a rated stroke of 20 mm (model suffix "2" indicates 20 mm stroke), and transmits force to the matched mechanism (e.g., brake release linkage) through the top connector, completing actions such as brake release.

The rated extension time is ≤0.4 seconds, ensuring rapid response to equipment operation signals.

1.2 Reset (Power-Off Stage)

When the power is cut off or the control signal is terminated, the motor stops running, and the hydraulic pump ceases pressure supply. The built-in pressure relief valve opens, and hydraulic oil flows back to the reservoir.

The return spring (60Si2MnA alloy steel) in the cylinder rebounds, pulling the piston and push rod back to the initial position. The thrust is fully released, and the matched brake or control mechanism resets under its own spring force to achieve braking or locking.

The rated retraction time is ≤0.35 seconds, enabling quick braking response and ensuring equipment safety.

1.3 Stability & Safety Guarantees

Pressure Stabilization Design: A built-in pressure compensator maintains consistent system pressure, ensuring stable thrust output even with minor load fluctuations.

Overload Protection: The motor is equipped with F-class insulation and a thermal protector, which cuts off power when the temperature exceeds 155°C to prevent burnout due to prolonged overload.

Anti-Leakage Structure: The cylinder adopts FKM high-pressure seals and a welded reservoir, with an IP54 protection rating for the whole machine, effectively resisting dust and light water splashes.

2. Key Features

Compact Integration: Modular design integrates motor, pump, and cylinder, reducing installation space and simplifying on-site assembly.

Sensitive Response: Total response time (extension + retraction) ≤0.75 seconds, adapting to high-frequency start-stop cycles (up to 400 times per hour).

Durable & Low Maintenance: The hydraulic system uses a closed circulation design, with no need for frequent oil replacement; wear-resistant components ensure a service life of ≥12,000 working hours.

Wide Compatibility: Standardized push rod connector and mounting flange, compatible with YWZ, JWZ series block brakes and various industrial control mechanisms.

3. Typical Applications

With a rated thrust of 18 kN and a 20 mm stroke, the YT1-18ZB/2 is suitable for medium-duty industrial scenarios, mainly used in:

3.1 Hoisting & Transportation Machinery

Serves as the core drive component for YWZ4, YWZ5 series electro-hydraulic block brakes, applied to overhead cranes, gantry cranes, electric hoists, and rail transfer carts in workshops and logistics centers.

For example, during the lifting and moving of workpieces by overhead cranes, it precisely controls the brake's opening and closing, avoiding workpiece shaking or equipment sliding, and ensuring hoisting safety.

3.2 Metallurgical & Mining Auxiliary Equipment

Used in the braking systems of blast furnace feeding machines, billet conveyors in metallurgical plants, and small mine belt conveyors, inclined shaft winches.

Its F-class insulation motor and dustproof design adapt to high-temperature, dusty working environments, stably controlling equipment braking to prevent material spillage or equipment runaway.

3.3 Port & Construction Machinery

Matches the braking mechanisms of small port stackers, container gantry crane traveling systems, and construction site tower cranes, construction elevators.

In construction elevators, its rapid reset performance can trigger emergency braking within 0.35 seconds in case of sudden power failure, protecting the safety of operators and materials.

3.4 General Industrial Control Scenarios

Used for opening and closing control of industrial valves (e.g., material pipeline valves, steam valves) and driving small clamping devices, swing mechanisms (swing angle ≤90°).

For example, it drives the valve core of material conveying pipelines through push rod expansion and contraction, realizing precise start-stop regulation of materials.

 

 

 

 

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