When the piston air compressor is working, the internal gas is quickly compressed and the temperature rises quickly. In order to reduce the exhaust gas temperature, the air compressor must be cooled. The usual cooling measures are interstage cylinders and post-press cooling, and there is a cooling medium flow in the cooling system to reduce the temperature of the compressed air and air compressor to ensure their normal operation.
1.2 Cooling can maintain the displacement of the cylinder in addition to improving the lubrication effect, but also maintain the normal displacement of the air compressor. In order to prevent the piston from damaging the cylinder due to thermal expansion. The cylinder of the compressor should maintain a fixed volume of more than 7 volumes. After a good exhaust, there is a small amount of gas remaining in the cylinder. The temperature of the remaining gas gas varies. Under normal circumstances 1 The necessity of air compressor cooling 1.1 Cooling can improve the lubrication conditions During the operation of the air compressor, the viscosity of the lubricating oil is easily torn with the temperature of the oil film. Reduces lubrication and causes various accidents. In severe cases, the lubricating oil evaporates the light fractionated oxide under the action of high temperature to form acid asphalt and carbide. These metamorphic materials are easily deposited to form carbon deposits, and oxidize and exotherm under high temperature and high pressure, if the heat is not released in time. Will spontaneously ignite and produce an explosion. The working cycle of the lower air compressor is 1234 1. However, if the cooling effect on the cylinder is poor. The working cycle of the air compressor becomes 1+2. 3 The exhaust temperature rises and the exhaust pressure increases. It can be seen from 1 that under the condition of poor cooling, the expansion process 41 of the air compressor is increased compared with the expansion process 41 under normal conditions, and the suction process is shortened, that is, 121 2. Due to the atmospheric pressure at the suction port It is basically constant, so the inspiratory velocity is unchanged in both processes. Thereby the amount of inhalation is reduced. There is a reduction in discouragement. Maintaining a good cooling of the cylinder overcomes the problem of high exhaust gas temperature and high pressure fire exhaust. , 1.3 cooling can improve efficiency in order to prevent the formation of carbon deposits. In response to the cylinder of the air compressor, the main purpose is to dissipate the frictional heat between the piston and the cylinder. To provide a good working environment for the lubricating oil, usually control the amount of cooling water to maintain the exhaust temperature + more than 200 is appropriate.