Maintenance of cylinder of Zhangjiagang Bolite air compressor

Maintenance of the cylinder of Bolite air compressor in Zhangjiagang
The main problems with the cylinder of Bolite air compressor include wear, cracks, connection damage to the valve cavity or cracks and tilts on the sealing surface.
You can use a level to check the tilt of the cylinder. If you find that the tilt of the cylinder and the crosshead exceeds the allowable range, you can check the connection of the cylinder and use a pull wire to check. After inspection, if the lower part of the cylinder is worn unevenly, the cylinder must be bored or replaced. Remove the piston and check the roughness of the cylinder wall. Because the damaged spring valve piece of the valve falls into the cylinder, etc., many blow-by channels are worn out on the cylinder wall, causing the compressor efficiency to decrease. If the maximum allowable wear of the cylinder is exceeded, boring or replacement of the cylinder should be considered.
If the sealing plane of the valve cavity is slightly damaged, you can apply engine oil and Versat on the valve and grind it in person to achieve a complete fit between the two stop planes. If the damage is serious, use tools to grind or grind it. Turning If the damage is so severe that it cannot be repaired on site, boring machines and machine tools are used to repair it. Other joint surfaces of the cylinder can be repaired using similar methods.
When the wear marks on the cylinder and the difference between the maximum and minimum diameters due to wear exceed
or more, the cylinder must be bored. In order to make the cylinder end of the piston have a tapered hole, the size of the bore in the cylinder should not be larger than the cylinder diameter
The piston force increased after boring should not be larger than that of the original equipment
The increased diameter shall not be larger than the original
The cylinder wall reduction shall not be larger than the original
The method of boring the cylinder can be selected according to the company's equipment and maintenance capabilities. If you choose to use a boring machine for maintenance, the cylinder after the cylinder is bored. There will be obvious knife marks left on the wall and it will need to be ground once to achieve good surface roughness. If you choose a vertical lathe for maintenance, you can get good surface and inner surface roughness accuracy, but it also needs polishing. According to the conditions of the enterprise, a more ideal effect can be achieved by performing grinding again after completing the above boring cylinder maintenance process.
Generally speaking, if a cylinder crack occurs, the cylinder must be replaced. If the location of the crack is not very important and the crack is small, it can be repaired. When cracks occur in the water jacket, a steel plate can be used for repair. To prevent further expansion of the crack, cold welding can be used for repair. For repairing cracks with low pressure, metal spray paint can be used. For repairing smaller cracks in the cooling water cavity, putty can be applied to the cracks. If there are cracks in the valve cavity flange and other valve cavity defects of low-pressure outlet air valves, the valve cavity defect repair method can be used. Cracks can also be repaired with wire plugs.
If there is slight roughening or scratches on the surface of the cylinder, you can use a whetstone to grind it manually until there is no obvious feeling when you touch it.
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