Hydraulic decoilers are commonly used uncoiling equipment in the stamping industry. They play a crucial role in the manufacturing process, but their braking system can sometimes be a concern. Traditional braking methods for decoilers often use contact-type mechanical friction, which can lead to friction plate damage, a short lifespan, and poor braking effects. In addition, determining the braking force accurately is often difficult.
When the decoiler is under heavy load, the traditional braking method’s stability and safety can be especially poor. That’s why a stable and reliable braking method is needed. The hydraulic valve braking method has become the preferred option in the production of hydraulic decoilers as it replaces the traditional butterfly brake system.
The hydraulic valve brake of the hydraulic decoiler contains three sets of one-way valves and an overflow valve. The design is reasonable and provides a more stable structure, reliability, no noise, adjustable braking pressure, high stability, long service life, readable braking pressure, obvious braking effects, and can ensure the high-efficiency unwinding of the hydraulic decoiler.
Additionally, the hydraulic valve brake can maintain braking for a long time and ensure equal forward and reverse braking force. This is not possible with traditional braking methods.
Working Principle of Hydraulic Valve Brake System
The hydraulic valve brake of the hydraulic decoiler is installed in the oil pressure brake system of the decoiler, connected to the inlet and outlet joints of the oil tank with the reversing valve, and fixed on the inlet and outlet oil ports of the oil pressure motor through the inlet and outlet joints.
The working principle of the hydraulic valve brake system is simple. When the electromagnetic IDT on the reversing valve of the decoiler loses power and the electromagnetic DT is powered, the oil flows through the inlet and outlet joints via the reversing valve, driving the oil pressure motor to rotate clockwise or counterclockwise, actively uncoiling the rotating shaft.
The system pressure is adjusted by the overflow valve. When the electromagnetic DT on the reversing valve of the decoiler loses power and the IDT is powered, all four oil ports on the reversing valve of the decoiler are closed. When the rotating shaft of the decoiler rotates clockwise or counterclockwise under external force, the oil formed by the oil pressure motor’s rotation flows through the one-way valve group, the overflow valve, and the return oil port back to the oil tank.
Since the IDT is powered, another oil path flows through the reversing valve, the low-pressure oil port, the one-way valve group, and the inlet and outlet oil ports to enter the oil pressure motor, compensating for the leakage and providing the liquid flow generated by the oil pressure motor’s rotation. At this time, the system pressure is adjusted by the overflow valve. The actual braking pressure of the oil pressure motor of the decoiler is the difference between the adjusted pressure of the overflow valve and the adjusted pressure of the overflow valve.
Conclusion
In conclusion, the hydraulic valve brake system has numerous advantages over traditional braking methods. It provides a stable structure, reliability, no noise, adjustable braking pressure, high stability, long service life, readable braking pressure, obvious braking effects, and can ensure the high-efficiency unwinding of the hydraulic decoiler.
The hydraulic valve brake system’s working principle is straightforward and can maintain braking for a long time, ensuring equal forward and reverse braking force. These advantages make the hydraulic valve brake system a preferred option in the production of hydraulic decoilers in the stamping industry.
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