Clean room workshop refrigeration system maintenance
Clean room workshop refrigeration system maintenance
Whether the refrigeration unit can be in a good operating state mainly depends on the correct and reasonable operation management and normal maintenance and repair work. After the refrigeration unit runs for a certain period of time, all moving parts and friction parts will appear corresponding wear, some gaps...
Text label: clean room workshop, refrigeration system maintenance
Clean room pharmaceutical cleanroom refrigeration system maintenance
Whether the refrigeration unit can be in a good operating state mainly depends on the correct and reasonable operation management and normal maintenance and repair work. After the refrigeration unit runs for a certain period of time, all moving parts and friction parts will appear corresponding wear, some gaps increase, and some lose their working ability; static equipment also affects normal operation due to corrosion, vibration, scaling and other factors. The purpose of maintenance is to disassemble, clean, measure and inspect the components of the refrigeration system, observe If the parts are worn or damaged, repair or replace the parts to restore the operation performance of the parts to ensure the normal operation of the refrigeration unit. Although the disassembly process of various piston refrigeration compressors is basically similar, due to different structures, the disassembly steps and requirements are also different, and different disassembly process regulations must be formulated; Relevant valves connected to the high and low pressure systems, remove the complete protective cover, etc.; if the pressure in the machine is below 0.49*105Pa, connect the steam release valve with a plastic pipe or a rubber pipe to the outside, open the steam release valve, and release the trace The residual ammonia is directly released outdoors; when disassembling the statically matched parts, pay attention to the direction to prevent damage to the parts. For the parts whose fixed position cannot be changed in direction, they should be marked to avoid wrong installation. Clean and install relevant parts in time to prevent loss; disassembled parts should be numbered and placed on special brackets and workbenches in order, and do not pile up randomly to avoid damage to parts; disassembled oil pipes, steam pipes and water pipes, etc., wrap the holes with cloth after cleaning to prevent dirt from entering. After the parts are disassembled, clean and degreasing in time, and cover them with cloth to prevent dust.
Air valve inspection is mainly to measure the opening degree of the suction and exhaust valve pieces and the tightness of closing. If the opening is too large, the movement speed of the valve piece will be large, and the valve piece will be easily broken; if the opening is too small, the cooling The resistance of the agent vapor passing through the valve plate increases, which affects the suction and exhaust efficiency. The opening degree of the valve plate is related to the rotational speed of the compressor. Generally, the lower the rotational speed, the greater the opening degree. On the contrary, the higher the rotational speed, the smaller the opening degree; The degree of measurement can be done with a depth gauge or a feeler gauge; when the valve plate is slightly worn or scratched, it should be re-ground and overhauled; when the valve plate is worn and its thickness is 0.15mm smaller than the original standard size, it should be replaced. When the shaft seal device is in good condition, it does not need to be disassembled, because the position of the shaft seal parts changes every time they are disassembled, and the rubber ring of the shaft seal is soaked and swelled by the refrigerated oil, and will not return to its original size after disassembly. The upper and lower joints of the shaft seal chamber are directly cleaned with oil; when the parallelism deviation of the two friction surfaces in the shaft seal device exceeds 0.015-0.02mm, it should be repaired or replaced; when the shaft seal oil leakage exceeds 10 drops per hour, it should be disassembled and inspected. Carefully grind the sealing surface, and replace the rubber ring when it loses elasticity and sealing ability due to aging, shrinkage and deformation. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean rooms and clean workshops.
When disassembling the cylinder liner, it is necessary to check whether the ejector rod of the cylinder liner rotating ring can slide up and down flexibly, and whether the serrated inclined surface of the rotating ring is ground into a pit. Check the wear of the ejector rod. When the length of the ejector rod does not make the unloading mechanism unload the ejector rod, replace the ejector rod; when the convex circle of the push rod of the rotating ring pushing the cylinder liner is worn 0.5mm less than the original size, it should be replaced; the unloading mechanism oil piston spring When it loses elasticity, it should be replaced. When the oil pump works normally, it is better not to disassemble and inspect the oil pump device; if the valve needle of the oil pressure regulating valve is worn and cannot meet the needs of oil pressure regulation, it should be repaired. The high and low pressure pressure gauge is an instrument used to monitor the movement of the refrigerant. Its accuracy level should not be lower than 2.5. If the indicated error exceeds the positive and negative allowable difference between the accuracy level of the table multiplied by the maximum scale value of the table, it should be calibrated. Check or replace; when the error of the thermometer indication exceeds the standard thermometer plus or minus 1°C, it should be replaced; compare the complete spring on each cylinder of the compressor on the flat plate, or compare it with the new spring on the flat plate, if the free height is shortened too much by 5-10mm Above, to repair or replace the spring, if the spring has cracks, it must be replaced with a new spring.
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