This article mainly introduces the cause of the crack of the air compressor body and how to detect it. We can only detect it if the air compressor body crack is caused by what causes it.
Causes of cracks in the air compressor body:
(1) The cooling in the cylinder head of the machine is not. After parking in winter, it is not frozen in time.
(2) The internal stress generated during the casting of the casting is gradually enlarged after the vibration is used.
(3) Caused by a mechanical accident. Such as: the piston is broken, the connecting rod screw is broken, causing the connecting rod to break off, or the balance iron on the crankshaft flies out to damage the body and the parts in the gas valve fall off the bad cylinder head.
How to detect the crack of the air compressor body:
(1) Kerosene infiltration method:
When inspecting, first wipe the part of the body and the cylinder head suspected of cracking with cotton yarn soaked with kerosene, and immediately apply white powder. At this time, where there is a crack, the kerosene will penetrate into the white powder, and the location and length of the crack will be clear. Shown it.
(2) Water pressure method:
It is to check the crack location by increasing the cooling water pressure.
In factories with good equipment conditions, the water pressure check is carried out on the water pressure device. In the units with poor equipment conditions, some use ordinary water pressure pumps to make simple equipment. During the inspection, the water pipe joint of the body or the cylinder head is blocked. Only one of the water pipe joints is connected with the water pump outlet by a rubber hose. The plane on the body should be a special cover with a similar size so that the cooling water cannot overflow. Open the switch, press the water pump to make the water enter the cooling water jacket. After the water is turned on and off, turn off the switch and continue to press the water pump to stop the water supply when the pressure gauge pointer reaches 3~4 atmospheres. At this time, you can look carefully. There are no water leakage or water seepage in the upper, lower, inner and outer parts of the cylinder head and cylinder head.