The fully automatic dual vibration quantitative feeder is an industrial equipment that integrates material conveying and precise measurement. It achieves uniform material conveying through the cooperation of dual vibration sources and, in conjunction with an automatic control system, achieves quantitative feeding. It is widely suitable for continuous production needs in industries such as mining, building materials, and metallurgy. The following will explain its working principle and core structural composition.
1、 Working principle
The device is powered by dual vibration excitation and combined with weight detection and automatic control system to achieve closed-loop operation of "vibration conveying weight measurement precise control". The specific process is as follows:
•Dual vibration collaborative feedingThe equipment is equipped with two sets of vibration motors as excitation sources, which operate synchronously in reverse along the centerline of the machine body. Through the rotation of the eccentric block, a composite excitation force is generated to drive the reciprocating linear vibration of the feeding tank, causing the material to jump forward along a parabolic trajectory. The main vibrator drives material dispersion with high frequency and low amplitude, while the auxiliary vibrator drives material transportation with low frequency and high amplitude to avoid clumping and blockage, ensuring uniformity.
•Weight detection and signal transmissionThe weighing sensor below the feeding trough detects the instantaneous weight of the material in real time, converts the signal into an electrical signal, and transmits it to the control unit; The speed measuring component synchronously collects the operating frequency of the motor, and the two types of signals provide basic parameters for quantitative calculation.
•Fully automatic quantitative regulationAfter receiving the signal, the control unit calculates the actual feeding amount and compares it with the preset value. If the deviation from the set value occurs, the system adjusts the motor speed through a frequency converter to change the excitation force and vibration frequency - as the speed increases, the feeding amount increases, and vice versa, achieving dynamic and precise control; The equipment has a rapid start stop response and can instantly start and stop the material flow, improving quantitative accuracy.
2、 Main structural components
The equipment structure is designed around three major functions: vibration conveying, weight measurement, and automatic control. The core components are as follows:
1. Vibration conveying structure
•Dual vibration motor componentComposed of two synchronous vibration motors, with adjustable eccentric blocks at the shaft end, the excitation force and conveying speed can be adjusted by changing the angle between the eccentric blocks. The motors are installed on both sides or at the bottom of the feeding trough to determine the conveying efficiency and uniformity.
•Feeding tank bodyTilted design, material selection based on material characteristics, wear-resistant steel plate or anti-corrosion material, smooth inner wall to reduce adhesive wear; Both ends are equipped with feeding and discharging ports, which connect the silo and downstream equipment respectively. The length and inclination angle of the tank can be adjusted as needed.
•Elastic support deviceIncluding excitation spring and isolation spring - the excitation spring connects the motor and the slot body, transmits excitation force and amplifies vibration; The isolation spring is installed between the groove and the frame to absorb vibration energy, reduce dynamic loads on the foundation, and minimize noise interference.
2. Weight measurement structure
•load cellMostly in the form of shear beams or cantilever beams, evenly distributed on the load-bearing brackets at the bottom of the feeding trough, accurately capturing weight changes and meeting industrial quantitative requirements; Flexible connection with the tank body to avoid vibration affecting the detection.
•Load bearing rackSupporting the feeding trough and sensor requires sufficient rigidity and stability to prevent deformation from affecting detection accuracy; A leveling device is installed at the bottom to facilitate the calibration of levelness during installation.
3. Automatic control and auxiliary structure
•electric control systemComposed of PLC controller, touch screen, frequency converter, and signal acquisition module. The controller receives signals and performs calculations, and adjusts motor parameters through a frequency converter; The touch screen can set the feeding amount, display operating data, support mode switching, and some devices have RS485 interfaces that can be connected to the factory DCS system for centralized control.
•Auxiliary protective componentsThe top of the tank can be equipped with a dust cover to prevent dust; Install a guide plate at the discharge outlet to guide the material; Install shock-absorbing pads at the bottom to enhance vibration isolation effect; Some models are equipped with material dredging devices to handle the transportation of viscous materials.