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Introduction to Electro-Hydraulic Actuators
Electro-Hydraulic Actuators are a new type of power actuator that can replace hydraulic or pneumatic cylinders in industries such as mining, the steel industry, machinery manufacturing, lifting and transportation, tunnel excavation, marine facilities, signaling systems, the chemical industry, rock and soil engineering, and the petroleum industry. For instance, they can be used as power-driven devices in applications like mine car stoppers, safety gates, and swing platforms; in blast furnace operation cylinders during steelmaking; in lifting and transporting equipment for material handling; and even in railway switch machines.
The general working principle of the braking system
Electro-Hydraulic Actuators are a new type of power actuator that can replace hydraulic or pneumatic cylinders in industries such as mining, steel manufacturing, machinery production, lifting and transportation, tunnel excavation, marine facilities, signaling systems, the chemical industry, rock and soil engineering, and the petroleum sector. For instance, they can be used as power-driven devices in applications like mine car stoppers, safety gates, and swing platforms; in blast furnace operation cylinders during steelmaking; in lifting and transport systems for material handling; and even in railway switch machines.
Brake Classification
① Friction brakes: These rely on the friction force between the braking component and the moving part to achieve braking. ② Non-friction brakes: The main structural types of these brakes include magnetic powder brakes (which use the shear force generated by magnetizing magnetic powder for braking), magnetic eddy current brakes (whose braking torque can be adjusted by regulating the excitation current), and water eddy current brakes, among others.
The disc brake industry in 2011 was ready for a major push.
A representative from a certain bus manufacturer told our reporter that disc brakes—gradually adopted for buses and trucks in Europe starting in the 1970s—began to see widespread use from the 1990s onward. Today, nearly all buses in Europe are now equipped with standard disc brakes. But what about the situation with disc brakes in China? According to a draft discussion document of GB 7258, the "Technical Specifications for Operational Safety of Motor Vehicles," submitted for review in May 2010, buses longer than 9 meters must have disc brakes installed on **all wheels**. If all goes smoothly, this requirement could become mandatory as early as 2011.
The Development Trends of Technology in the Industrial Brake Industry
The primary driving method for brakes is Electro-Hydraulic Actuators, followed by AC or DC electromagnets, with a small number using hydraulic drives and pneumatic devices. Thanks to their advantages—such as minimal impact, low operational noise, simple control, long service life, and low operating costs—Electro-Hydraulic Actuators have become the mainstream choice for high-speed shaft industrial brakes. In the realm of safety brakes, however, hydraulic-driven brakes remain the dominant option.