How to select and purchase air compressors for sand blasting machines not only involves how to use funds rationally, but also has a direct relationship with the economy and reliability of normal operation in the future. This article introduces common sense issues in this regard.
General purpose air compressors are regulated by national standards, and the exhaust pressure is 0.7 MPa. If it is higher or lower than this pressure, it is a non-standard special air compressor.
The main types of air compressors are as follows: According to the gas transmission volume (referred to as the volume of each minute of gas discharged into the suction state when the air compressor is in operation), there are small machines (exhaust volume below 10 cubic meters per minute) Medium-sized machines (with an exhaust volume of 10-100 m3 / min), and large machines (with an exhaust volume of 100 m3 / min or more).
According to the structure type, there are rotary, piston and membrane air compressors. Common types are piston type and rotary type, screw type and sliding vane type. The screw compressor rotor profile is complicated and the manufacturing cost is high, but its small size, light weight and small parts. In the case of the same displacement, screw compressors are much more expensive than piston compressors, and maintenance personnel must also have specialized knowledge and experience.
According to the cylinder centerline and relative position, it can be divided into vertical, horizontal, and angle air compressors. Among them, the angle type is divided into V type, W type, L type and so on. Generally speaking, since the piston compressor is a reciprocating machine, there is a certain amount of vibration. The angle type can balance its inertial force well. Therefore, most of the small and medium-sized piston compressors are made into angle type. Only the compressors for vehicles and ships are established due to the limitation of the occupied area. Horizontal compressors are early products, and because they have no superiority, they are almost no longer produced.
Choosing the right air compressor can make full use of the performance of the sand blasting machine, so that the quality of the sand blasting process is continuously improved.
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