Fault solution for common parts of large air pressure system

  First, maintenance and measures

(1) the air filter dirty is often a problem, the reason is that the atmospheric dust is filtered by the filter. When the air compressor running a few days may be covered with dust, dust situation must be timely monitoring. General in the gas into air compressor pipeline installation of differential pressure meter, monitor inlet pressure relative to atmospheric pressure, differential pressure, pressure reaches t inches that filter is dirty, must deal with. In order to reduce operating costs, the processing method is to remove the filter, with compressed air to clean the air and then put back to use. But after many times of cleaning the filter can not be used again and again, we must replace the new filter. As the new filter is imported products, the price is expensive, often change the operating costs high. Therefore, the use of the same type of domestic production of the same type of filter products, the results and the filter effect, and the price of a few times cheaper. Greatly reduce the production cost and thus achieve the localization of the filter device.

(2) the problem of reducing gas cooling effect. Air compressor internal gas cooling using water cooling, in the initial period of use, access to the cooling water is running water, running for a period of time, the gas cooling effect will fall. The main reason is that the cooling water system pipe wall fouling or blockage. The solution is: high pressure water is forward, reverse flushing, there is a certain effect, but still not ideal. "After repeated washing with detergent, the effect is very good. But the remover with strong acid, corrosion of cooling water system of pipe wall, frequent washing will make the tube wall thinning, tube pressure resistance and service life and palliative. The most effective way is to deal with the causes of fouling and clogging. Due to the water easy scaling, so the cooling water to use is not easy to scale the softening of water, and in the cooling water access to the mouth of the filter, clean the filter regularly. This maintenance is simple and convenient, but also reduces the failure rate of the equipment, and has extended the service life of the system.

(3) the cooling oil temperature is too high. The air compressor system of internal bearing lubricating and cooling, the temperature is not too high and too low temperature of oil is too low, no lubrication, high temperature and overheat and burn components inside the machine, in the process of operation due to heat generated and the bearing temperature, lubricating oil and water is used to cool the temperature too high, so for a reason two aspects: one is the cooling water, the same way to solve the above problems with gas cooling; on the other hand is a lubricating oil circulation system, the solution is: the use of qualified lubricating oil; cleaning oil filter periodically; adjust oil bypass valve, the lubricating oil through the bearing is adequate; on a regular basis temperature detecting device check, found error or damage on the replacement.

(4) the shaft vibration value is too large. In the air compressor system, each axis of the compressor is equipped with a vibration probe, and the radial vibration of the system is monitored in real time. If the shaft vibration value increases, the main reason is the bearing wear serious, or impeller damage

  Caused by unbalanced rotation. Preventive measures are: strictly follow the air compressor operation procedures, which is very important for the protection of the bearing, the use of qualified lubricating oil, the bearing is prohibited to overheat operation; prohibit the use of debris into the air compressor in vivo; regular hearing, look, check, eliminate hidden dangers.

(5) the speed of air compressor surge is a unique phenomenon. The reason is: in the certain rotate speed of impeller, if air compressor exhaust flow down to less than or equal to a certain value, the exhaust gases will be flowing into the air compressor, and air compressor exhaust formed on top and swings back and forth, surge. The impact force of the surge will greatly damage the compressor components, must strictly prevent. The design of air compressor has been used to control the intake valve and bypass valve to effectively control the surge, the bypass valve opening to control the gas flow, and in order to save energy and control intake valve opening, so as to avoid acting too much and a waste of energy. But in the rapidly close the outlet valve at the same time, because the bypass valve is open fast enough, will make the air compressor surge occurs. Therefore, must pay special attention to the normative and rationality of the comprehensive measures such as operation, can effectively prevent the occurrence of surge.

  Two, summary

  Through the above analysis, the large air compressor system in the production process of maintenance is very important, many fault in the daily maintenance and maintenance process can be excluded in the bud before. Therefore, it is necessary to start from the most basic, adhere to norms of operation, adhere to the daily inspection and inspection maintenance work, in order to maximize eliminate hidden troubles, reduce the failure rate to effectively reduce production costs, improve production efficiency and economic benefits.