Screw wear problem of screw air compressor
The screw of the air compressor is damaged, the screw of the air compressor rolls in the drum, the lubricating oil rubs against the compressed gas and the screw body, the surface of the screw is gradually worn, the diameter of the screw is gradually reduced, and the diameter of the inner hole of the screw body is gradually increased. In this way, as the wear gradually increases, the gap between the air compressor screw and the body increases slightly. However, since the resistance of the machine head and the splitter plate does not change, this increases the leakage flow when the gas moves forward, that is, the flow of gas and lubricating oil, from the gap to the intake direction, and the result is that the flow of the discharge machine decreases.
The second is the revision of the air compressor screw. The screwed rod should be considered according to the actual inner diameter of the machine body. The outer diameter error of the new screw should be manufactured according to the normal clearance with the machine body. After the surface treatment of air compressor thread, alloy is thermally sprayed and ground to the required size. This method is generally processed and corrected by the spraying factory, and the cost is relatively low. Screw air compressor Screw air compressor wear screw thread parts surfacing alloy. According to the degree of wear, carry out surfacing welding with a thickness of 1-2mm on the screw rod, and then grind the screw rod to adjust the size. The wear-resistant alloy is composed of c, cr, vi, co, w and b, which improves the wear resistance and corrosion resistance of the screw. In the surfacing factory, this processing cost is very high, except for the special requirements of the screw, it is rarely used. The correction screw can also be externally plated with hard chrome. Chromium is also a wear-resistant and corrosion-resistant metal, but the hard chrome layer is relatively easy to fall off.
The correction of the air compressor body, the hardness of the inner and outer surfaces of the air compressor body is higher than that of the air compressor screw, and its damage is higher than that of the air compressor screw. Engine block scrapping means that the inside diameter has increased over time due to wear and tear. The correction method is as follows: if the machine body still has a certain nitriding layer due to wear and tear, directly drill holes in the machine body, grind it into a new diameter size, and then manufacture a new screw according to the diameter. Process and trim the inner diameter of the fuselage, recast the alloy with a thickness of 1~2mm, and then finish machining to the required size.
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