Equipment size, purge, etc. provide air supply.
Over the years, the type air compressor has failed many times during operation, and the causes and troubleshooting methods of some faults are summarized.
1 abnormal sounds 1.1 knocking sounds in the cylinder 1.1.1 Analysis of the dead space between the piston and the cylinder head is too small, direct impact.
2 The piston rod and the piston connecting nut are loose or tripped, or the anti-loose mouth of the screw is loosened.
The center line of the crankshaft linkage and the cylinder does not coincide.
There is water leakage in the cylinder.
The metal debris valve in the cylinder is called a spring or other, hard object.
Too little oil causes friction between the piston and the cylinder.
1.1.2 Elimination method Adjust the piston stroke and increase the dead space between the piston and the cylinder.
Look at the tightening nut on the piston rod and install the lock washer or split pin.
Check and adjust to make the crankshaft connecting rod piston and the center line of the cylinder.
Check the cause of water leakage, such as damage to the cylinder gasket and the oil, and repair it to eliminate water accumulation in the cylinder.
Remove the cylinder head, remove the foreign object and check to confirm that if the foreign object is a valve disc or spring, the corresponding intake and exhaust valve must be repaired in time.
Check the operation of the piston type oiler to ensure that the oil injector supplies the cylinder normally.
1.2 The knocking sound of the suction and exhaust valve 1.2.1 Cause Analysis The valve of the suction and exhaust valve is broken.
The valve spring is broken or not strong enough.
The seat is not seated when it is installed in the valve chamber, or the bolts on the bonnet are not tightened.
The suction and exhaust valves are not tight.
1.2.2 Remedy Check the suction and exhaust valve to replace the valve with severe wear or breakage.
Check the spring on the suction and exhaust valve and replace it if it is broken or does not meet the requirements.
Reinstall the seat, adjust the seat position by padding, and tighten the bolts.
Check the tightness of the suction and exhaust valve and do the kerosene leak test.
2 Exhaust volume reduction 2.1 Air filter failure 2.1.1 Talk analysis Air filter icing or fouling in winter, causing increased resistance and affecting air intake.
Poor ambient conditions, inhaling unclean air and clogging the filter.
The suction pipe is too long or the suction pipe diameter is too small, which affects the amount of suction.
2.1.2 Remedy Replace the filter and clean the filter element for a specified period of time.
When installing the filter, choose a suitable place to ensure that the air compressor draws in clean air.
In accordance with the air compressor design and installation standards for the suction pipe section 2.2 cylinder failure 21 The cause of the analysis of the cylinder wear exceeds the allowable value, forming a leak, affecting the displacement.
2 The asbestos gasket on the joint surface of the cylinder head and the cylinder block is damaged or not tight, which affects the displacement.
3 piston and cylinder mismatched, the gap is too large, the formation of leakage 4 cylinder cooling water temperature high cylinder water jacket scaling cooling water pressure and flow is insufficient, so that the gas is preheated when passing through the chamber into the cylinder, affecting the displacement 12.2. 2Remove the boring and milling cylinder, and replace the larger piston and piston ring to reassemble.
Replace the asbestos pad on the cylinder head and cylinder block joint surface.
On-load tap-changer operation and maintenance precautions Tuqing East Luyi County Electric Power Bureau, Henan Luyi 477200 on-load tap-changer is convenient and safe for its voltage regulation, and it is widely used in the Yang main transformer and distribution transformer. There are a few points to note about the operation and maintenance of the on-load tap-changer.
Before putting into operation, first electric several cycles, check the switch rotation process, in case of power failure in the middle, and the switch has not been switched, the main spring may be in tension, in order to avoid the motor starting under load, when the power is restored , should press the reverse button and then use it normally.
In manual operation, it is necessary to wait for the tap changer to shift about 58 before the reverse operation to prevent the motor from continuing to run along the last running direction, especially when the limit gear is used, so as not to cause over-speed operation.
If you are working in a gear position frequently, in order to eliminate the oxide film and oil stain at the contact area of ​​the contact, to ensure good contact and switching speed, you must switch at least once every six months.
3 When the insulation strength of the switch + tank and the transformer oil is lower than 25, the new oil should be replaced. When the switch and the transformer are oiled, the vent plug on the switch is opened, and the oil overflow 0 is closed.
Develop a test and maintenance cycle for the on-load switch. The new commissioner should be tested in accordance with the relevant regulations.
Check the switch for 3 or 5 years of operation and the oil color is abnormal. During the card adjustment process, the switch is more turbulent. After the switch is switched multiple times, the screw cap is easy to loosen. Check whether the switch switch fixing screw is tightly drawn. Measure the transition resistance value of each gear of the load switch. Check the tightness of the static and dynamic contacts. Whether the fixing bolt is loose or not, the contact with severe burn should be replaced to check the burn quantity of the contact surface of the moving and static contact, check whether the connecting line has broken strands, as long as there is one broken strand, the other must also be replaced with gas protection. The on-load switch of the action shall be subjected to an oiling test and a transition resistance test after the failure.
For long-term non-action on-load switch, the effect of the test and inspection, the corresponding test and repair content and cycle should be formulated. For frequent movements and heavy loads, the test should be shortened appropriately. 3 Install the appropriate piston and piston ring according to the standard, so that the gaps of each part meet the specified requirements.
4 Ensure that the cooling water pressure flow temperature meets the requirements. When the cylinder is disassembled for maintenance, thoroughly clean the scale of the cylinder water jacket to ensure the cooling effect.
2.3 Suction and exhaust valve failure 2.5.l It is proposed that the valve seat and the valve plate are not tightly contacted by the suction and exhaust valve, and the valve seat and the valve plate are worn, causing leakage and affecting the displacement.
The suction valve spring is not elastic. If the elastic force is too strong, the opening is slow when inhaling, and if the elastic force is too weak, the closing is not timely in compression, which affects the displacement.
The suction valve spring is broken, and when it is compressed, it will also cause a phenomenon of tight closure and untimely, which affects the displacement.
5 The exhaust volume is reduced, the pressure of the intercooler is lower than the normal pressure, and the exhaust valve cover of the stage cylinder is heated, indicating that the exhaust valve of the stage is in question.
6 The exhaust volume is reduced, the pressure of the intercooler is higher than the normal pressure, and the exhaust valve cover of the stage cylinder is heated, indicating that the exhaust valve of the stage cylinder is faulty.
The displacement is reduced, the pressure of the intercooler is higher than the normal pressure, but the exhaust valve cover of the stage cylinder is not too hot, and the stage cylinder 2.3.2 excludes the treatment to check each suction and exhaust valve to ensure the correct installation.
Scrape the valve seat and the valve contact surface, or replace the new seat and valve plate.
Check the spring force and replace and install the standard-compliant spring according to quality standards.
Inspect the damaged spring and replace it.
Remove the extra hot exhaust valve and inspect it.
Inspect and repair the exhaust valve on the cylinder of the stage, replace or replace the damaged and unmounted å¿– on the exhaust valve of the cylinder, check or repair, replace or re-adjust the damaged and not installed Lined turtle.
Check the tightness of the cylinder inhalation valve and the lining of each part
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