Quick understanding of screw air compressor
When it comes to the working principle of the oil-injected screw air compressor (hereinafter referred to as the air compressor), the first thing that everyone thinks of is the three working processes of the screw main engine: suction, compression, and exhaust. Because many air compressor related books at home and abroad have detailed records of the working principle of the screw mainframe and the design of the intake and exhaust orifices. Nowadays, many colleges and universities have specialized courses in compressors. Under the leadership of the teachers, they research the screw mainframe to improve the efficiency of the screw mainframe. Therefore, there are many self-written teaching materials for screw mainframes in major universities. However, the relevant information of the air compressor is not so complete and detailed.
How do you know and understand the air compressor machine? Here is how to understand the air compressor when I first entered the line: I started with a master to watch the structure of the whole machine, and introduced the name of each component (large components); in order to remember the name and working principle of various accessories on the air compressor All of them are "dead memory", which is inefficient, and it is easy to miss key information.
During my many years of work, I have met many colleagues who have just entered the business. I am as blind as I was when I first entered the business. I can’t grasp the key points and learn more. Some people have been obsessed with the concept of air compressor after a year of study, and their principles seem to understand. This not only wastes their time, but the company also loses confidence in its training.
If the service personnel are not very familiar with the air compressor system process and the working principle of each component, there will be many unnecessary rework in the work, and the unclear description of the fault in the communication with the customer will result in the customer to the individual and the company. Professionalism is questioned. Today we will summarize and summarize how to quickly understand the screw air compressor!
Air compressor working principle: The machine must first press the power switch, and the electric control system can complete the unit's step-down start before it can run normally. (To reduce the impact on the power grid/energy saving and emission reduction, take the star-delta step-down start or frequency conversion. Soft start. The two kinds of step-down starting methods of Yanbian triangle and autotransformer are very rare due to the high cost and technical requirements, so it is very rare to apply on the air compressor. According to the command of the electronic control system, the power system starts to run and starts to establish the system quickly. The pressure is used to ensure the smooth circulation of the lubricating oil; after the internal pressure is established, according to the command of the electronic control system, the air intake system executes the opening command, so that the air compressor is normally inflated (inhalation, compression, exhaust); The post-oil mixture enters the separation system, completes the cyclone separation and separates the lubricating oil and the compressed air through the fine separation of the oil core, and the lubricating oil is returned to the bottom of the separation system (oil and gas barrel); the compressed air flows through the minimum pressure valve and is cooled by the cooler. Discharge machine, pressure control signal pressure point is generally set on the cooler exhaust side Square or above (because the cooled compressed air has the least damage to the pressure sensor, and the upper part is free of condensed water, the detected pressure value is more accurate); the lubricating oil flows out of the oil and gas tank and flows into the cooler through the temperature control valve (if the temperature is low) At the valve core opening temperature, the lubricating oil is directly injected into the screw main body through the oil filter. The cooled lubricating oil is returned to the oil filter, and the impurities are filtered and injected into the compression chamber of the screw main body to assist the completion of the compression process.
According to the working process of the air compressor, the working principle of the air compressor and the principle of each component can be quickly, conveniently and comprehensively memorized. In order to facilitate the understanding of the working principle of the air compressor, the air compressor system flow is first removed. The air compressor can be divided into the following seven systems: electronic control system, air intake system, power system, separation system, cooling system, piping system, silencer system. It can be seen from these seven systems that there is a direct relationship between the first six systems and the air compressor system flow.
