Hydraulic arrester with capabilities of speed adjustment and soft braking

Abstract

A hydraulic speed regulation type soft brake for the underhung conveyer is composed of hydraulic system and electric control system. The said hydraulic system consists of braking pump and hydraulic pump station which comprises manual reverse valve, electromagnetic overflow valve, proportional throttle valve, filters, oil tank, pressure meter, cut-off valve and sensors (flow sensor and rotation speed sensor). Its advantages are high braking stability, and no need of cooler.

Description

Technical field [0001] The invention relates to a hydraulic speed regulating brake device. It is especially suitable for use in conjunction with mechanical systems that must be braked, such as conveyor belt conveyors. Background technique [0002] For some downward belt conveyors with a large inclination angle, the sliding force generated by the gravity of the material greatly exceeds the running resistance, so that the drive motor runs in the state of power generation, and when the brake is stopped, the sliding force all acts on the braking device On the other hand, it is easy to cause the brake device to fail and cause speeding, causing accidents such as running coal, hurting people, broken belts, and motor rotors being damaged. In response to this situation, many brake devices have been developed at home and abroad. One of the brake devices that is more commonly used and has a better effect is the hydraulic speed control brake. The speed valve is used to adjust the brak...

AI Technical Summary

Problems solved by technology

[0002] For some downward belt conveyors with a large inclination angle, the sliding force generated by the gravity of the material greatly exceeds the running resistance, so that the drive motor runs in the state of power generation, and when the brake is stopped, the sliding force all acts on the braking device On the other hand, it is easy to cause the brake device to fail and cause speeding, causing accidents such as running coal, hurting people, breaking the belt, and the motor rotor is broken.

In response to this situation, many brake devices have been developed at home and abroad. One of the brake devices that is more commonly used and has a better effect is the hydraulic speed control brake. The speed valve is used to adjust the braking force. At present, the maximum operating pressure of the domestic speed control valve is 28Mpa, and the high-pressure and large-flow hydraulic system should generally reach a pressure resistance of 35Mpa, so a base pressure valve must be added to the system, and the base pressure valve distribution The speed regulating valve can work normally only after the pressure of 4~5Mpa

As a result, no matter in braking or non-braking conditions, the base pressure valve is always working under pressure, resulting in heat, which makes the entire hydraulic system heat and cannot work normally.

The second is to use the preset braking law to adjust the braking speed. The control part is simple and no feedback signal is used. The braking torque generated by the hydraulic system cannot be consistent with the braking torque required by the actual working conditions of the tape machine. Belong to open loop control

The third is that the hydraulic brake system generally adopts an open system, and the open system is most susceptible to the influence of the surrounding environment. After the oil is polluted, it often causes the entire system (especially the important valve parts) to fail to work normally.

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