How do I check if there are cracks in the compressor housing? What should I do if there is a crack?

　　A compressor is a driven fluid machine that promotes a low-pressure gas to a high-pressure gas. The compressor often cracks in the housing due to casting, processing defects and other reasons. For the inspection and repair of cracks in the compressor housing, let's take a look at the following introduction.

　　How do I check if there are cracks in the compressor housing?

　　Infiltration kerosene method: when inspecting, first wipe the body and cylinder head with a cotton yarn impregnated with kerosene, suspect that there is a crack, and then use the dry cotton yarn to wipe off the kerosene, and immediately coat it with white powder, then where there is a crack, kerosene will penetrate into the white powder, and the part and length of the crack will be clearly displayed.

　　Water pressure method: The crack area is checked by increasing the cooling water pressure. In repair shops with better equipment conditions, the hydrostatic check is carried out on a special equipment, a hydrostatic tester. In the unit with poor equipment conditions, some are made of simple equipment with ordinary hand-pressurized water pumps, when inspecting, first try to block the water pipe joint of the body or cylinder head, only one of the water pipe joints is connected with the water pump outlet with a rubber pipe, and the upper plane of the body should be selected with a special cover plate of the same size, so that the cooling water cannot overflow. Then turn on the switch to push the pump and let the water enter the cooling water jacket. After the switch comes out of the water, then turn off the switch and continue to press the pump, at this time, you can carefully check the fuselage, whether there is water leakage or water leakage inside and outside the cylinder head.

　　How to repair the crack in the compressor housing?

　　The common repair method is welding, but some compressor parts are made of cast iron, aluminum alloy, titanium alloy, which is difficult to do welding treatment. And there are some dangerous occasions that are prone to explosion, and it is not easy to use weld repair methods. At present, the more popular carbon nanopolymer material coating technology will not produce high temperature in the process of repair, avoiding the influence of thermal stress, and is safer and more reliable than welding repair. The specific repair steps are as follows:

　　1. Check the crack location for the presence of loose blocks and remove the loose blocks;

　　2. Surface treatment, remove the surface paint layer, rust layer, grind out the metal primary color and clean it with absolute ethanol;

　　3. Adjust the Solei carbon nanopolymer material according to the proportion, and harmonize it uniformly without color difference;

　　4. Apply the blended material to the repair site to ensure full combination with the metal;

　　5. Install the flange and bolts and tighten them in place;

6. Use materials to protect and strengthen the whole from the outside.