I.Screw air compressor mainframe
Screw air compressor When the main engine is running, the screw and the screw The between, the screw and the main body casing and the front and rear end faces are theoretically non-contacting. The reason is that the oil film formed during normal operation of the main engine does not directly contact the screw and the screw. Of course, in the short time after the main engine is started or stopped, the oil film is not formed or the oil film state is poor, and there is also a relationship between the screw and the screw. Certain direct contact. 2 The machining precision of the screw and the main body shell ensures that there is a proper gap between the screw and the main body casing after the main assembly, and the gap size has taken into account the difference in the deformation amount between the screw and the casing when the main engine is running at a high temperature. 3 The clearance between the screw and the front and rear end faces is guaranteed according to the technical parameters when the screw assembly is performed. The gap size also takes into account the difference between the deformation of the screw and the front and rear end faces when the main engine is running at high temperature. At the same time, the radial load and axial load of the screw are both borne by the positioning bearings at both ends of the main machine. The screw has no axial displacement and therefore the end clearance Further assurance is obtained. As the operation time of the air compressor changes, the machine bearing will inevitably wear out, resulting in axial turbulence and radial turbulence of the screw. This change causes a change in the gap between the screw and the screw, between the screw and the main housing and the front and rear end faces. This gap change is normal and permissible for the life of the bearing. The resulting air compressor attenuation and transmission motor load increase are also normal and allowable. However, serious consequences can occur when the bearing wears and the host fits the clearance beyond the allowable limit. First, friction occurs between the internal screw of the main unit and the front and rear end faces, and between the screw and the main body casing. The motor load increases dramatically. The most serious consequence is that the screw is locked or even the host is scrapped. If the motor protection reaction is insensitive or ineffective, it may cause the motor to burn out. Secondly, the large attenuation of gas production by air compressors may affect the normal production of gas units. This shows that overhauling the host is necessary and necessary.
Label [screw air compressor host][DSNEair air compressor host]
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