Ed Series Electro-hydraulic Thruster ED80/6

Ed Series Electro-hydraulic thruster ED80/6

The ED80/6 is a high-performance electro-hydraulic thruster from the ED series, engineered as a power source for industrial brakes, clutches, and rail clamps. Classified as a three-phase AC-driven, integrated electro-hydraulic actuator, it features fast response, stable thrust output, and compact design-optimized for heavy-duty industrial scenarios requiring reliable linear power transmission. The model designation clarifies core parameters: "ED" for Electro-Hydraulic Thruster series, "80" for nominal thrust (80 kN), and "6" for piston stroke (60 mm). Widely used in hoisting, metallurgical, mining, and port machinery, it provides driving force for braking/clamping mechanisms under harsh working conditions (dust, humidity, high temperature).

As a member of the ED series electro-hydraulic thrusters, the ED80/6 features a compact structure and sensitive action. Its working principle revolves around the conversion of electrical energy, hydraulic energy, and mechanical force, with application scenarios concentrated on various industrial equipment requiring braking or drive control. Details are as follows:

Working Principle

The thruster consists of two main parts: a drive motor and a body (centrifugal pump). The body includes core components such as a cover, cylinder, piston, impeller, and rotating shaft. The entire unit uses electrical energy to drive the hydraulic system and generate mechanical movement, with the specific process divided into two stages: power-on driving and power-off reset.

1. Power-On Driving Stage

When connected to 380V three-phase AC power, the motor starts and drives the rotating shaft and the impeller on it to rotate at high speed. This rotational movement creates a pressure difference inside the piston, prompting hydraulic oil to be sucked from the upper part of the piston to the lower part. The thrust generated by the accumulated oil forces the piston, as well as the push rod and crossbeam fixed on the piston, to rise rapidly. Subsequently, the load spring is compressed through a lever mechanism, converting hydraulic energy into mechanical force to drive supporting devices such as brakes to complete actions like release. Its rated lifting time is 0.32 seconds, enabling quick response to equipment operation requirements.

2. Power-Off Reset Stage

When the power is cut off, the motor stops running, and the impeller also ceases rotation, causing the pressure inside the piston to dissipate rapidly. At this point, the rebound force of the load spring and the piston's own gravity work together to push the piston down quickly. This process squeezes the hydraulic oil in the lower part of the piston, making it flow back to the upper part of the piston. The push rod and crossbeam return to their initial positions along with the piston, and the supporting brake resets under the action of the spring force to achieve equipment braking and locking. The rated descending time of this stage is 0.34 seconds, which can quickly complete braking and ensure equipment safety.

Typical Applications

With a rated thrust of 800N and a rated stroke of 60mm, the ED80/6 is suitable for various industrial scenarios requiring stable braking or driving. Specific applications are as follows:

1. Hoisting and Transportation Equipment

It is often used as an operating component for electro-hydraulic block brakes such as the YWZ4 and YWZ5 series, and is applied to the braking systems of overhead cranes, gantry cranes, electric hoists, and other equipment. For example, when an overhead crane in a workshop moves or lifts workpieces, the ED80/6 can precisely control the opening and closing of the brake, avoiding workpiece shaking or equipment sliding and ensuring the safety of hoisting operations.

2. Metallurgical and Mining Machinery

It plays a role in equipment such as steelmaking converters and blast furnace feeding equipment in metallurgical plants, as well as belt conveyors and mine hoists in mines. These devices operate in harsh environments and require frequent start-stop cycles. The ED80/6's F-class insulated motor has strong heat resistance, and its IP55 protection rating can resist dust intrusion. It can stably control equipment braking and prevent safety accidents caused by equipment out of control during material transportation.

3. Port and Construction Machinery

Port container cranes, stackers, as well as tower cranes and construction elevators on construction sites, all rely on it to achieve precise braking and positioning. For instance, when a container crane lifts a container, the thruster can cooperate with the brake to firmly fix the equipment position, avoiding equipment displacement caused by external forces such as sea breeze. During the operation of construction elevators, its rapid reset performance can quickly trigger braking in the event of sudden power failure, ensuring the safety of passengers.

4. Other Auxiliary Driving Scenarios

In addition to supporting braking systems, it can also be used for opening and closing control of industrial valves and gates, as well as driving some mechanisms with a directional swing angle of less than 90° and clamping devices. For example, it controls the opening and closing of valves in material conveying pipelines, and drives the valve core to move through the expansion and contraction of the push rod, realizing the start-stop regulation of material transportation.

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