What is a vacuum pump
A vacuum pump is a rotary variable-volume gas delivery pump, which can be used only with a backing pump. It has a large pumping speed in a wide pressure range and is insensitive to dust and water vapor contained in the gas to be pumped. It is widely used in metallurgy, chemical industry, food, electronic coating and other industries. Vacuum pump is a device that generates, improves and maintains vacuum in a closed space by various methods. It can be defined as a device or equipment that uses mechanical, physical, chemical or physico-chemical methods to evacuate the evacuated container to obtain vacuum.
Maintenance skills of vacuum pump
1. Wear of bearing position of pump shaft: Wear of transmission position of vacuum pump is a common problem, including wear of bearing position, bearing seat, bearing chamber, keyway and thread. Traditional methods mainly focus on repair welding and brush plating, but both of them have some disadvantages: the thermal stress caused by high temperature of repair welding cannot be completely eliminated, which easily leads to material damage and parts bending or fracture; However, brush plating is limited by the thickness of the coating, and it is easy to peel off. Moreover, both of the above two methods use metal to repair the metal, which cannot change the "hard-to-hard" coordination relationship, and will still cause re-wear under the comprehensive action of various forces.
maintenance skills: polymer composite material repair method is widely used in contemporary western countries, and American Meijiahua technology system is widely used, which has strong adhesion and high compressive strength. This method can be repaired without disassembly and machining. The influence of welding thermal stress is not affected, and the repair thickness is not limited. At the same time, the product has concession, which can absorb the impact vibration of equipment, avoid re-wear, greatly prolong the service life of equipment parts, save a lot of downtime for enterprises and create huge economic value.
2. Corrosion: The corrosion forms of vacuum pump can be divided into two categories: overall corrosion and local corrosion. The former occurs uniformly on the whole surface of vacuum pump, while the latter only occurs locally, such as pitting corrosion, crevice corrosion, intergranular corrosion and stress corrosion.
Maintenance skills: The organic coating on the surface of the vacuum pump is made of polymer composite material, which has very good chemical resistance, excellent mechanical properties and adhesive properties. Compared with the traditional welding repair of pressure vessels, it has the characteristics of simple construction, low cost, good safety performance and good repair effect.
3. Cracks and ruptures in the shell: The vacuum pump often causes cracks or fractures in the parts due to casting, machining defects, internal stress and overload operation.
maintenance skills: the conventional repair method is welding, but some parts are made of cast iron, aluminum alloy and titanium alloy, so it is difficult to weld them. There are also some dangerous situations that are prone to explosion, and it is even more difficult to use welding repair methods. Meijiahua technology is a kind of "cold welding" technology, which can avoid thermal stress and deformation. At the same time, the material has good adhesion, compression resistance and corrosion resistance, which can meet the use requirements of various equipment parts to the greatest extent, thus effectively ensuring production at the lowest cost, which is safe, convenient and reliable.