Control Of Noise in Rice Milling Machine Whitening Room

In order to better control the noise of the whitening room, the installation, operation and maintenance of each component of the whitening room should be considered as a whole, so as to achieve the purpose of control and treatment.

(1) In order to ensure the smooth operation of the rice beater(rice milling machine) and reduce vibration, the rice beater(rice milling machine https://www.shellermachine.com/combine-rice-mill-machine ) must be leveled during installation, the anchor bolts must be fastened, and the static balance test must be carried out before the use of the roller. The method is as follows:

place both ends of the sand roller shaft on the calibrated horizontal knife edge ruler or two parallel supports, and rotate them for many times. If the position remains unchanged after each static, it means that the downward side of the roller is biased. At this time, rotate 1 ~ 2 sections of the sand roll by 180 ° and retest to adjust the eccentric weight. If it is still unsolved, use the sand roller scraper to scrape off part of the sand surface layer at the eccentric position before the test, and be sure to achieve balance. It is forbidden to use the sand roll which is too heavy to repair, otherwise the machine body of the sand roll which is too heavy in production will produce severe vibration and even damage the roller and equipment.

(2) If the surface of the sand roll is uneven, it shall be trimmed with a sand roll scraper. When finishing the sand roller, the groove bottom and groove edge shall be shaped into an arc to reduce rice grain damage. During the repair, the sand roller shall be installed on the shaft and the shaft shall be overhead to prevent the sand roller from contacting the ground and damaging the sand surface. During the trimming process, the chisel shall be knocked gently and the chisel shall be cut quickly, and the groove size shall be kept correct.

(3) When the roller is assembled, the ribs or grooves of each roller must be aligned, and the joint must be flat. During the assembly of the sand roll, 0.20 ~ 0.5mm thick cardboard shall be padded between the roller and the screw conveyor and between the roller and the roller to prevent the sand roll from loosening, dislocation and damage. During assembly, the shaft of the sand roller shall be erected on the ground with the help of the end pulley. Do not sleep on the ground and install it in the horizontal direction, because it is not easy to tighten, but also easy to grind the sand surface.

(4) The sand roller shall not be used if it has cracks. If there are obvious potholes or missing on the roll surface, it shall be replaced or repaired in time.

(5) When assembling the rice screen, the rice screen shall be kept flat to avoid the phenomenon that the two ends are low between high and medium or the two ends are low and the middle is high. The rice screen joint shall be flat to prevent overlap and reverse overlap is not allowed. The gap at the joint shall not be greater than 2mm to avoid greater noise during the impact and rolling of rice grains.

(6) The assembly position of all parts in the whitening room shall be kept flat and smooth, and there shall be no unevenness. The screen pressing strip and rice knife shall be kept flat without sharp edges to prevent damage to rice grains.

(7) During the operation of the rice machine, a certain amount of brown rice shall be kept in the hopper, and "breaking", "lifting" and "emptying" are not allowed. It is required to keep the flow stable during the normal operation of the rice machine.

(8) After shutdown, the wear of sand roller, rice knife, rice screen and other components shall be checked frequently. If the wear is serious, it shall be repaired and replaced in time.