Vertical mill vibration and hydraulic aspects associated with the solution

Vertical mill vibration and hydraulic aspects associated with solutions - 2020 07 - 17 a, current situation and set slow raw material localization to now has 20 years or so, sinoma tianjin hospital continuously digesting and absorbing foreign mature experience and optimization has become a new vertical mill equipment with independent property rights. But according to the user in use process understanding vertical mill has often occurred in the process of raw material grinding rod cavity pipe shatter; Accumulator temperature rise and the fungus valve damage; The phenomenon such as cylinder is easy to damage and leakage. The user will be informed at the first time the hydraulic manufacturers to the scene to solve the problem. Second, the general reason analysis to the scene first, from the aspects of hydraulic check reason, but eighty-five percent of the reason is due to the vibration roller mill drive hydraulic vibration, just on the hydraulic performance is strong. The company for hydraulic is a barometer of the phenomenon and the role of the victim; Have ten percent of the reason is because of the damage of the accumulator; Have five percent of the reason is one of the reasons caused by lubrication. Specific analysis is as follows: 1, eighty-five percent of the reason to to consider from the vertical mill equipment production technology, the key is the stability of the material layer decision vertical mill vibration value. The stability of the material layer is mainly composed of powder and dust collecting to decide, hydraulic practitioners to this understanding is limited, only roughly know part of it. 2, ten percent of the reason is due to the damage of the accumulator and installation of pipe caused by the unreasonable in itself. For example, 420/220 - 200 pressurized cylinder as an example, the trip from 2 - when the normal work Calculated on per 4 back and forth between 50 mm: 5 single rod chamber volume. 3 litres, 4 times per second is 20. 12 liters, throw accumulator line and the accumulator opening size and velocity, a 40 litres of accumulator capacity is enough, it is confirmed that why some of mill imported oil cylinder and the accumulator directly fixed on the cylinder with 1 - 2 only the accumulator can meet the demand. And domestic vertical mill generally has 3 - 4 only 40 litres of accumulator can meet the requirements of working condition. 3, five percent is the cause of damage and leakage of the oil cylinder earrings as a result of oil cylinder before and after the glycerin lubrication of the earrings does not reach the designated position, still exist in the process of oil cylinder movement before and after the process of earrings trace rotating joint bearing, once the lubrication does not reach the designated position lock joint bearing moment would be several times on the oil cylinder of the lateral force cause the damage of the oil cylinder. Three, solutions and measures according to the above the comprehensive factors, to solve vertical mill in hydraulic vibration problem, through many years observation and experiment, control the oil cylinder down speed ( The rise in oil cylinder speed and the original agreement) Can reduce the mill vibration value. To speak in front of the 4 times up and down to 2 per second per second - 3 times, the vibration of the mill vibration can drop to normal value about 2 seconds/mm. Because each mill grinding of raw material and different use of pressure difference, in the process of adjustment will have differentiation. Source: the changzhou cheng, hydraulic technology co. , LTD.