Structure and calibration method of horizontal spiral centrifuge

Horizontal spiral centrifuge is composed of frame, hood, main bearing, drum, screw, differential, drive system, control system and safety protection system. The drum and the screw rotate in the same direction at a differential speed, and the material enters the spiral inner cylinder through the feeding pipe, and enters into the drum from the feeding port. But what should be paid attention to in the calibration method of horizontal spiral centrifuge? The following Liaoyang high tech Jet Vacuum Equipment Co., Ltd. to briefly introduce.

Under the action of centrifugal force, heavy solid materials are deposited on the drum wall to form a sediment layer, which is continuously pushed to the cone end of the drum by the screw and discharged out of the machine through the slag discharge port. The lighter liquid phase material forms an inner liquid ring, which continuously overflows the drum through the overflow port at the large end of the drum and is discharged out of the machine through the liquid discharge port.

At the same time, the rotating drum of the horizontal centrifuge not only bears the mass of the rotating drum itself, but also bears the same pressure. The screw conveyor can continuously send the sediment to the slag discharge outlet and discharge the machine. According to the different solid-liquid ratio of the processed materials, the ratio of the infusion channel to the slag discharge channel can be 1B1, 1b2.

The differential speed between screw and drum of hydraulic motor is realized by hydraulic motor. The oil supply quantity of the hydraulic motor can be adjusted automatically through an oil delivery joint. Because the horizontal spiral centrifuge is hydraulic transmission, with a hydraulic station designed, and the rotating speed of the drum is usually about 3000r / min, it is considered to adopt thin oil lubrication. The lubricating oil is circulating supply, so it can cool the bearing at the same time of lubrication.

There are two calibration methods for horizontal screw separator. One is fine tuning search method. The sensor is installed on the micro displacement mechanism, and its sensitive axis is along the radius direction of the rotating cylinder. Before rotation, the rotating cylinder rotates at the speed of (250-300) rpm, and the sensor transfers along the sensitive axis with the help of micro displacement mechanism until its output is small and approximately equal to zero.

The rotating drum stops and the micro displacement mechanism is locked and positioned. At this time, the vertical axis of the rotating cylinder from the rotating shaft is the position of the mass center of the sensor. The radius from the center of rotation to the center of mass of the sensor can be measured accurately. The other is position rotation method, which is to calibrate the sensor twice on the horizontal spiral centrifuge.

During each calibration, the sensor is installed in the same position of the turntable or the rotary arm, and its sensitive axis is rotated 180 degrees along the radius direction. In the two calibrations, the sensor is installed at the mounting point of the table in the same position. In order to determine the mass center of the sensor, the clamping position of the sensor is constantly changed and adjusted at the same place of the horizontal spiral centrifuge to make the output voltage of the two calibrations equal, then the clamping position of the sensor is the mass center.