Apron feeder is a kind of commonly used feeder equipment, divided into heavy, medium and light. The apron feeder is commonly used in ore dressing feeder.
Apron feeder is widely used in mining, concentrator, chemical, cement, building materials and other industries, widely used in the storage bin to crushing, transportation and other machinery for uniform continuous feeding. Increasing productivity and upgrading downstream equipment require that the feed rate of upstream equipment is variable, and the adjustable conveying speed means higher production capacity. To meet user requirements, we adopted induction motor speed regulation methods based on the market conditions at that time. Method of controlling the speed of asynchronous motor: On the motor control panel, we can see that the formula for the speed of AC induction motor is N = 60 * f1 / p * (1-s). According to the above formula, there are several ways to adjust the speed of the asynchronous motor: 1 Pole-changing speed control The pole-changing speed control is usually divided into 4/6/8 poles. The number of poles of the motor corresponds to the speed of the motor, so its application range is small and subject to certain restrictions. 2 Slip rate This speed control method is invalid because the slip rate is too high and the slip loss is large at low speeds. If we choose this method to ensure its reliability, we usually choose the motor with the highest motor power to calculate the motor power: for example, if the motor power is calculated as 45kW, we should use a 55kW motor to calculate to ensure that the feed baffle is at low-speed Will not produce too little power. In addition, when this kind of motor is used in a metal mine, the carbon brush of the slip ring is more likely to be stained with iron powder, and a long-term short circuit will cause an accident in the motor. 3 Frequency control of asynchronous motor To keep the power factor of the excitation motor constant, we also expect to keep the path unchanged by adjusting the frequency of the asynchronous motor. The above parameters have changed, the power has dropped, the torque has dropped, and the engine power cannot be fully utilized, causing losses, so if the frequency is adjusted to keep t track constant, the track can remain unchanged normally. Frequency, the diameter of the voltage/frequency core must be specified. The voltage should change in proportion to the frequency. The feeding ring is a semi-continuous feeder, its power is low speed and high torque, and its speed control method is a typical constant torque speed control, which requires a frequency converter to ensure that VI and FL change proportionally to ensure that the frequency changes with the same overload capacity. . In Figure 10, the output torque is the largest and constant.
Above we introduced How to Adjust the Speed of the Apron Feeder. The HENAN EXCELLENT MACHINERY CO., LTD is a professional bulk material conveying equipment manufacturer. We have a professional production capacity and rich production experience as well as strict product quality inspection. We can guarantee that every piece of equipment we produced is qualified equipment, and we ensure the qualified rate of the products. To know more about our products, Please visit our official website: https://www.exctmach.com/.