At present, epoxy resin and unsaturated resin are widely used in vacuum oil injection equipment in China. The unsaturated resin is cheap, can be cured at room temperature, and the pouring process is simple, but its electrical and mechanical strength is low and its heat resistance is poor; In addition, the full steam pressure of unsaturated resin is high, the mixed glue should not be degassed in vacuum, and it should not be vacuumized during pouring, and there are bubbles in the pouring body; The curing shrinkage of unsaturated resin is large, and the mixed adhesive is easy to crack during curing. Therefore, the unsaturated resin is only suitable for low-voltage products. The curing shrinkage of epoxy resin is small and the full steam pressure is low. It is suitable for pouring under high temperature and high vacuum, so as to improve the fluidity of the mixed adhesive, and then obtain a casting body with ideal function.

Attention should be paid to several links in repair, disassembly, cleaning, inspection and installation. It is very important that vacuum equipment, regardless of its size, belongs to mechanical equipment. The principle of handling with care shall be followed when disassembling. It is not allowed to tamper with or knock with a sledgehammer; Clean and completely clean the parts so as to find problems and dangers; Vacuum pump products are quite different from general mechanical products. General mechanical products are mostly chamfered and chamfered, while the edges and corners of vacuum pumps are clear, which is easy to hurt hands. You should be more careful and remember. Inspection is a meticulous work. Don't lose every detail, let alone have a fluke mentality. There is a device that has been stored for 4 years. After completing the routine cleaning work, the user connects the pipeline and starts vacuumizing. It can not meet the factory standard in any way. Everything is checked, that is, a vacuum hose for gas supply is not checked, and it is considered that the vacuum hose will not leak at that time. On the contrary, the problem lies in this vacuum hose. In addition, whether the vacuum pump is cleaned with gasoline or other solvents, it must be installed after the gasoline or solvent is completely volatilized. If the vacuum pump oil is mixed with other oils, solvents or water, its function will be damaged and the functional index of the vacuum pump will be affected. The rubber ring shall be cleaned and carefully checked for defects, such as cracks. And whether the size is correct. Pay special attention to those with similar sizes and diameters, such as 3.1mm and 3mm; The wrong size of 5.7 mm and 6 mm will affect the seal. For rubber rings with heating orientation, it is necessary to replace them every time they are disassembled and cleaned, such as the interfaces of oil booster pump. Pump parts also need to be handled with care during installation; Tighten the screws evenly and tighten them diagonally.

Vacuum pump, clean the set shape, keep it clean and free of rust; Check and replace worn components; Replace the vacuum pump oil; 2. Dip paint pipes and valves and check to eliminate air leakage; Check whether the paint inlet pipeline is smooth; Remove the residual paint slag in the pipeline and cylinder; Check the opening and closing conditions of all valves, recover or replace the worn valves; 3. Clean the electrical appliance box to keep the electrical device neat; Check that the safety device is safe and reliable; Check all electrical appliances and contactors and replace components; 4. Vacuum system, eliminate all vacuum system pipes and sealing rings, ensure that the vacuum conditions can be reached, and check and calibrate the accuracy of vacuum gauge.

The replacement of vacuum pump oil is not simply to drain the vacuum pump oil and then inject new pump oil. When replacing the pump oil, the vacuum oil filling equipment also needs to pay attention to the cleaning of residual impurities in the pump. The vacuum pump oil should be replaced after the vacuum pump has been used continuously for 3 ~ 4 months. When used in the environment with high humidity, it refers to the humidity in the pumped container. For example, when the external humidity is very high, it often recovers after exposing the atmosphere. At this time, it is said that the humidity is relatively high. If the mechanical pump always pumps a device that has always maintained vacuum under the condition of high external humidity, there is no need to replace the pump oil for a long time. Therefore, under the condition of high humidity, the oil change period should be shortened as appropriate. The replaced oil can be reused after cleaning and dehumidification.

During the drying process, the operator is required to? Check the drying condition once per minute and make relevant records.

Vacuum gauge and thermometer shall be checked regularly. Regularly check that the rotation of all moving parts is flexible enough. If problems are found, stop and correct them in time, and do not use them reluctantly.

The cylindrical worm gearbox (or CVT) shall be maintained according to its instructions.

After the filter in the tank is dried once, remove the powder absorbed around to make the filter unblocked.