which is the most accurate and difficult to be duplicated. The human eye is consists of sclera, iris, pupil. The iris is located between the black pupil and white sclera annular section. It contains a lot of overlap characteristics, such as sports, filaments, coronary, strips and fossaes. These characteristics are unique for each person. The iris recognition technology is to identify each person. The iris recognition technology is to identify each person by comparing the similarity between iris image characteristics.this is the key to open the lock after verifying the iris successfully .and the lock use iris technology is very high security . Iris Lock,Iris Home Security,Iris Home Management System,Iris Security System ChangChun E-vida Technology Co.,ltd , https://www.evidatec.com
High pressure gear pump is often used for flow measurement, or is used to viscous fluid or thin fluid delivery. The use of a long time will inevitably be a problem, do not promptly deal with will affect the decline in production efficiency, shorten the life of the instrument, so routine maintenance is extremely important, the following Xiaobian will introduce high-pressure gear pump structure for routine maintenance and selection Claim. High-pressure gear pump routine maintenance (l) Gear pump disassembly and cleaning, heating, cooling, starting and stopping should be strictly in accordance with the provisions of the operation to avoid undue losses. (2) Gear pump should pay attention to maintain the stability of the population pressure booster pump , So that it has a stable volumetric efficiency to facilitate the operation of the pump itself and the stability of the downstream spinning quality. (3) The negative pressure of the packing shaft seal pump should keep the packing pressure higher than atmospheric pressure. Timely adjust the pressure of stuffing box, otherwise it will make the pump suction into the air caused by the belt strip broken effect pelletizing leading pelletizing machine discharge. (4) gear pump should always check the heat medium jacket temperature and the front and rear cover of the heat Medium temperature should be consistent. (5) gear pump every time the production increase to the current production, speed, out, inlet pressure, current value recorded, and the recorded data to be compared, careful analysis in order to early detection of abnormal energy Timely processing. ã€Selection requirements】 First, to find out what is the pump delivery medium, how much viscosity, the temperature is high. Second, the actual use of the pump pressure requirements of the work how long the actual pipeline, the highest point of how high the number of elbows in the middle of the pipeline. Third, according to the actual pipeline customers reasonable calculation of the pump in the actual pipeline resistance, how much pipeline loss. Fourth, the actual delivery of the pump medium is corrosive, the PH value of the specific medium is how much, and in actual use of the corrosive nature of the medium temperature has not changed. Fifth, there is no lubrication medium, whether it contains particles or easy to crystallize. Sixth, the pump is in use whether there is positive and negative phenomenon. If it is sometimes used in reverse pumping, it should be indicated when ordering. Because the pump is equipped with a mechanical seal is prohibited to reverse, and the conventional pump if the reverse use will gear off. The high-pressure gear pump converts the mechanical energy input by the prime mover into the hydraulic energy of the flowing fluid, which belongs to the hydraulic energy element. When the gear rotates, the melt enters the tooth spaces of the two gears of the suction chamber. As the melt rotates from the two sides into the discharge chamber, the re-engagement of the gears causes the melt in the tooth spaces to be squeezed out of the discharge chamber To the outlet pipe. As soon as the pump shaft rotates the gear, the melt is delivered to the outlet side so that the pump outlet can reach very high pressure and the flow rate is not dependent on the discharge pressure. Industry Leaders Copyright (C) 2008, Xiamen) Technology Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps network editor: gogoing (QQ / micro-channel:) starting: http: //beng.liuti.cn/ (service hotline: 400 -6030-811)