Maintenance of piston refrigeration compressors (2)

04-03-2020

2. Main contents of daily maintenance work


① Check the indicators (such as pressure gauges, oil pressure gauges, thermometers, oil temperature gauges, etc.), lubrication conditions (such as oil injectors, oil tanks, and lubrication points) and the flow of cooling water.

② Listen frequently to the sound of the machine's operation. You can often listen to the sound of various moving parts (such as air valves, pistons, crossheads, crankshafts, bearings, etc.) with a stick to check whether the sound is normal.

safety valve

③ Touch every part diligently to observe the temperature change and vibration of the compressor, such as the drainage temperature, oil temperature, temperature and vibration of the machine during operation, etc., so as to detect abnormal temperature rise and the fastening of the machine early. , But pay attention to safety.

④ Inspect the working condition of the entire machinery and equipment regularly and find out the problem and deal with it in time.

⑤ Fill the machine operation record form carefully and responsibly.

⑥ Do well in the safety and sanitation of the machine room, keep the compressors clean, and do the shift work.

solenoid valve

3. Maintenance rules To ensure that the compressor is in good motion and to extend the service life of the machine, maintenance and maintenance should be performed in accordance with the rules. The compressor maintenance classification is as follows:


First-level maintenance (cumulative work 100h or every other month);

Secondary maintenance (cumulative work for 500h or every six months);

Three-level maintenance (cumulative work 1000 ~ 1500h or every other year).


According to the working conditions and maintenance experience of the compressor, the technical maintenance items can be appropriately increased or decreased.

① First level maintenance In addition to daily maintenance items, the following items must be performed.

magnetic flap level gauge

a. Refueling points should be refilled once a day or every shift. For special requirements, such as the lubrication of motor bearings, refuel according to the instructions. In short, all moving friction parts, including accessories, should be regularly refueled.

b. Use the machine in accordance with operating procedures. Regular inspection, regular adjustment, timely handling of failures, and keeping a running diary;

c · Clean the air filter;

d. Check the tightness of the fan belt and adjust it if necessary.


②Secondary maintenance In addition to the first-level maintenance items, the following items must be performed:


a. Check whether the opening pressure of the safety valves at all levels meets the requirements;

b. Check whether the action of the load adjustment mechanism meets the requirements, and if necessary, disassemble and inspect the load adjuster;

c. Disassemble the inlet and exhaust valves and clean them;

d. Change the lubricant and clean the oil pool;

e. Check the tightness of the connecting rod bolts and balance;

f. Check the connecting rod big head bearing clearance, piston pin and pin hole clearance, piston ring opening clearance, and piston ring groove clearance.

safety valve

③ Three-level maintenance In addition to the two-level technical maintenance items, the following items must be performed:


a. Check and measure the movement clearance of the wear parts, make a record, and provide original data for the next "three guarantees";

b. Cleaning dirt and scale in the cooler;

c. cleaning gas pipeline, crankcase;

d. Disassembling load regulators and unloading valves;

e. When disassembling and inspecting the intake and exhaust valves, special attention should be paid to the wear of the valve discs and springs, and the parts with greater wear should be replaced in time;

f. Disassemble and inspect each moving part, observe the wear of each friction surface, and replace parts in time if necessary.


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