Explosion Proof Electric Hydraulic Drum Brakes

DYW Series Explosion-proof Electro-hydraulic Brake

The core function of the DYW series explosion-proof electro-hydraulic brake is to provide safe, reliable, and powerful mechanical braking control in flammable and explosive hazardous environments through an explosion-proof electro-hydraulic drive. It is a critical safety braking device specifically designed for high-risk environments.

 

It is primarily used in industries where flammable and explosive gases or dust are present (such as Class IIC and lower hazardous areas), including coal mines, petrochemicals, metallurgy, ports, and grain processing. It delivers powerful, reliable braking protection for critical equipment such as cranes, conveyors, and hoists in these environments, meeting strict explosion-proof standards and ensuring inherent safety in production operations.

 

The main advantages of the product include: its inherently safe explosion-proof design, which completely eliminates the risk of igniting explosive environments; its reliance on an electro-hydraulic drive to provide powerful and stable braking force, ensuring reliable operation; a high level of protection for the entire unit, allowing it to function in a variety of harsh industrial environments; and its well-designed structure, which simplifies maintenance and effectively reduces operational difficulties and maintenance costs in hazardous locations.

Example: For a brake with a brake wheel diameter of 630 mm, a rated braking torque of 2000 N·m, and a vertically arranged brake spring on the side of the brake unit, the model number would be DYW630-2000.

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Note:

1. In addition to this series of brakes, our company also manufactures other types of brakes.
2. For non-standard products with custom models or specifications, please contact our technical support team.

The working principle of the DYW series explosion-proof electro-hydraulic drum brake is based on a combination of "normally closed design" and "electro-hydraulic control."

The brake consists of two main parts: one is the brake frame, which generates and transmits mechanical force, including the brake arm, brake shoes, and main spring; the other is the drive device that controls the power, namely the BED series explosion-proof electro-hydraulic actuator.

When the equipment stops or is de-energized, the brake is engaged. At this point, the electro-hydraulic actuator is not powered, and the internal motor is stopped. Under the tension of the main spring, the actuator's push rod moves downward. This motion is amplified and transmitted to the brake arms on both sides via a lever mechanism, causing the brake shoes to press tightly against the rotating brake wheel attached to the drive shaft. Braking is achieved through high friction, allowing the equipment to decelerate or remain stationary.

When the equipment is ready to operate, the brake needs to be released. The operator powers on the motor, and the electro-hydraulic actuator activates. The motor inside the actuator drives the oil pump, generating high-pressure oil. This pressurized oil pushes the piston and connected push rod upward. The upward force overcomes the downward tension of the main spring and, through the lever mechanism, pulls the brake shoes outward, disengaging them from the brake wheel. At this point, the brake is fully released, and the drive shaft can rotate freely.

The DYW series explosion-proof electro-hydraulic brakes are designed to perform reliably in harsh working conditions where explosion-proof requirements are necessary. Their core applications include:

• Underground Coal Mines: Used as working brakes for equipment such as belt conveyors, mine winches, hoists, and other machinery.
• Ports and Cranes: Applied for deceleration and parking braking in port loading/unloading machinery and various lifting and transport equipment.
• Metallurgy and Mining: Used in metallurgical equipment, mining winches, and construction machinery.

To ensure the proper operation and longevity of the brake, the installation and operating environment must meet the following conditions:

• Altitude: Not exceeding 2,000 meters.
• Ambient Temperature: Between -20°C and +40°C.
• Relative Humidity: Not exceeding 90%.
• Power Supply Voltage: Three-phase AC, 50Hz. Common voltage levels are 380V/660V or 660V/1140V, and the voltage fluctuation range must fall within specified limits.

The DYW series explosion-proof electro-hydraulic brakes are highly interchangeable, with installation dimensions and center height identical to those of the older BYWZ5, YWZ5, and YWZ9 series. No modifications to the main equipment are required for upgrades or replacements; direct installation is possible.

The core drive component must be paired with a BED series explosion-proof electro-hydraulic actuator, whose explosion-proof performance complies with GB3836 standards.

Regarding the installation location, vertical installation is preferred, with the motor positioned at the bottom. If site conditions are limited, inclined or horizontal installation is also possible, but the balance chamber must face upwards, and the piston rod must not be subjected to radial forces.

For electrical wiring, a special tool must be used to open the explosion-proof junction box and connect the power and ground wires. The incoming cable must be tightly fitted with the rubber seal, without any gaps, to ensure the equipment's explosion-proof performance is maintained.

Furthermore, when used in underground coal mines, it must be verified that the product, including the entire unit and actuator, possesses a valid mining product safety certificate and explosion-proof certificate.

Our company has passed ISO 9001 international quality system certification and possesses comprehensive quality assurance capabilities. All products are certified by national authoritative institutions, including the "Brake Type Test Certificate," "Explosion-Proof Certificate," and "Mining Product Safety Mark Certificate," ensuring full qualifications and reliable quality.

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