Analyze the malfunction of the nitrogen compressor
Time:2020-09-25 17:56:08 Source: 优尼捷 View: 634
- Nitrogen is a colorless, odorless, non-toxic, non-combustible, high-pressure gas stored in a cylinder. When its content increases and the oxygen content is below 19.5%, it may cause suffocation. Need to be equipped with self-priming breathing mask. The bottled nitrogen product is a high-pressure filling gas, and should be used after decompression and decompression. The packaged gas cylinders have a service life limit. Any gas cylinders that expire must be sent to a department for safety inspection before they can be used. When exhaust gas is used in each bottle of nitrogen, the residual pressure in the bottle should be kept at 0.5MPa, and the residual pressure should not be less than 0.25MPa. The bottle valve should be closed to ensure gas quality and safety in use.
- The nitrogen compressor has abnormal inter-stage pressure after more than 6000 hours of operation:
- The first-stage exhaust pressure and temperature were high and then dropped. Shut down and check, there are stainless steel sheets in the secondary air inlet valve, and stainless steel fragments are extruded on the upper and lower ends of the secondary piston body. There are stainless steel elastic rings in the ring groove of the piston ring of the piston body of this machine. At this time, the three second-stage piston rings only have 2.4-4.3mm (the new ring is 13mm, and the small radial thickness is 7mm). Due to the serious wear of the piston ring, the elastic ring in the groove came out and the cylinder wall was worn out, and the elastic ring was broken into pieces, causing internal leakage of the valve. After grinding the piston body and cylinder wall, replacing the new second and third stage piston rings, inspecting the air valves at all levels, removing the elastic rings at all levels, and returning to normal use, the elastic rings on the oxygen compressor of Hangyang are not removed. reuse.
- During the operation of the compressor, the third-stage exhaust temperature increased abnormally, and the first-stage piston rod did not move up and down, and the second and third-stage were normal. It was shut down to check that a cylinder collision accident occurred in the first stage: a fixing bolt of the connecting rod large-end bearing was broken, the piston stroke was increased beyond the limit, the aluminum piston body was smashed, the cylinder head was hit by the crack and the connecting rod was broken. Therefore, the machine was completely disassembled and overhauled, replacing the first-stage piston body, connecting rod, damaged main bearing bush, large head bush, connecting rod bolts, etc. The unit was re-centered and was able to be used again. The gas valve is faulty. During daily inspections, you can touch the suction valves at all levels by hand. If you find that it is hot or the temperature is obviously high, the valve has internal leakage and needs to be disassembled when the machine is stopped. Generally, the valve is broken or the valve is not sealed. Strictly, a loose valve cover can also cause internal leakage and abnormal noise. Failure of this stage of suction and exhaust valve can cause the pressure and temperature of the previous stage to increase.
- Nanjing Hante provides customers with oil-free compressors, nitrogen compressors, sulfur hexafluoride (sf6) compressors, helium compressors, medium and high pressure air compressors and other industrial equipment. We not only provide customers with air compressors, but also Customers provide oil-free compressed gas system solutions.
