Crashing often occurs. The air compressor violently vibrates while running, accompanied by a huge crash cylinder sound. After dismantling, it was found that when the valve piece and the valve seat were broken and the debris entered the cylinder, the piston top and the piston rod were damaged, and the crankcase and the crankcase cover plate were cracked. The above situation indicates that the unit is seriously damaged and must be completely and completely rebuilt.
Prepare the crankcase reinforcement and crankcase crack repair measures before repair: remove the first and second cylinder heads, pistons, remove the first and second connecting rods, crossheads, remove the first and second cylinders and their connecting pipes, and dismantle the first and second intermediate bodies. , remove the crankshaft and its cabinet. Using the machined reference surface on one side of the coupling end body box (the board thickness is 50 mm), a hole of 40 mm deep is drilled there to fix the T-shaped iron, and the two T-shaped irons are connected by long bolts.
T-shaped iron fixing is used to thicken the crankcase cover to 25mm, milling in the middle direction in the direction of the main shaft, leaving a gap of 2mm, and welding the side plates at a distance of 15mm on both sides of the gap to drill holes. When installing, first tighten the cover separately, and then tighten the side plates to achieve the purpose of reinforcing the crankcase. The crankcase reinforcement structure is drilled at the lowest end of the crack, with a hole diameter of 10 mm, and blocked with M10 wire. Use cast iron electrodes to weld on both sides of the crack to prevent cracks from leaking.
The valve is modified to be a mesh air cushion valve, and the valve plate is made of PEEK (polyether ether ketone) material. The material is wear-resistant and impact-resistant, has good sealing performance and low requirements on air quality. Since the seat is often broken, the cast steel seat is used instead. Cooler displacement Since the cooler is located above the first- and second-stage cylinders, the expansion and contraction of the cylinder in the axial direction is restricted, causing the first and second cylinder heads to swing side to side. Move the cooler to the west side of the unit (now the electrical excitation cabinet is placed, the excitation cabinet is shifted to the south side of the unit), and add two buffers at the primary and secondary inlets.
Replacing the secondary cylinder to rebuild the first and second cylinder barrel components, increasing the strength, and achieving the purpose of reducing the swing of the first and second cylinder heads. Adjust the alignment and level of the first and second cylinders and the main engine, and change the rigid connection between the scraper and the first and second cylinders as a soft connection, replace the cooler core, and support the first and second cylinder heads. Make renovations. Renovate the first and second scrapers to eliminate leaks. Modification of the air inlet filter Due to the defects of the air filtration system, the filtration effect is poor, resulting in a short service life of the valve, and the valve should be replaced or repaired on average for 3 days. Now the original air inlet acoustic filter is transformed into two sets of air filters with a filtration particle size of 2m and a filtration efficiency of 9999%.
Conclusion Through a series of technical transformations, BX air compressor units have long-term operation capability, which not only explores the production potential of oxygen production units, but also plays a role in regulating the production intensity of the equipment. When the summer air temperature is reduced, the compressor is turned on and connected to the grid; when the temperature is low in winter, the compressor is stopped; when the turbine unit fails to stop and repair due to the faulty gas volume, the compressor unit is turned on to operate the oxygen generator. The output and product purity are kept constant, which prolongs the service life of the equipment and ensures high-load long-term stable operation of subsequent production equipment.
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