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What problems should be paid attention to during routine maintenance of Roots blower?

Source: Roots blower manufacturer Published on: March 1, 2022 Hits:

  Roots blower It is a positive displacement fan, with impeller end face, fan front and rear end covers. The principle is a rotary compressor that uses two blade rotors to make relative movement in the cylinder to compress and transport gas. The blower is simple in structure and easy to manufacture. It is widely used in aquaculture oxygenation, sewage treatment aeration, cement transmission, and more suitable for gas transmission and pressurization systems in low pressure occasions, and can also be used as a vacuum pump. Today, the small editor will introduce the problems that need attention in the daily maintenance of Roots blower?

Rotor shaft keyway damage: due to the influence of equipment operating environment and other factors, roots blower often suffers from wear and damage of shaft head and keyway. After the problem occurs, it should be repaired by welding or machining after brush plating according to traditional methods. However, the thermal stress caused by the high temperature of repair welding cannot be completely eliminated, which is prone to bending or fracture; Brush plating is limited by the coating thickness and easy to peel off. Moreover, the above methods all use metal to repair metal, which cannot change the "hard to hard" matching relationship, and will still cause re wear under the combined effect of various forces. The use of polymer composite materials can quickly and effectively repair the wear of bearing chamber without machining. It is not affected by the thermal stress of repair welding, and the repair thickness is not limited. At the same time, the metal materials of the product do not have the flexibility to absorb the impact and vibration of the equipment, and can make the mating surface 100% contact, avoiding the possibility of wear again.
     

What should be paid attention to during the routine maintenance of Roots blower?

Treatment of shell cracks: Roots blower components often cause cracks or fractures in equipment components due to casting, processing defects or internal stress, overload operation and other reasons. The conventional repair method is welding. Welding often leads to thermal deformation or thermal stress of parts, especially thin-walled parts, and some parts are made of cast iron, aluminum alloy, titanium alloy and other difficult welding materials. There are also occasions that are prone to explosion hazards, such as petrochemical industry, and it is not easy to use welding repair methods.
Oil seal leakage: due to the serious oil leakage during the operation of Roots blower, it has brought many drawbacks to the safety production. The traditional method is to shut down for a long time to remove and replace the sealing gasket and deal with the joint surface. In order to achieve effective treatment during the operation of the equipment, the traditional method cannot be achieved. Metre super sealant lubricant, with super self-lubricating performance, can reduce the clearance of meshing parts, effectively alleviate equipment noise and oil leakage of dynamic sealing parts. Super lubricant is a kind of oil additive, which will not pollute or deteriorate the oil. It solves the potential safety hazard in production for enterprises without stopping the machine, and saves high maintenance or replacement costs for enterprises.
Corrosion protection of pump chamber: metal corrosion can be divided into comprehensive (uniform) corrosion and local corrosion. The former occurs evenly on all surfaces of the fan, while the latter only occurs locally. For example, pitting corrosion, crevice corrosion, intergranular corrosion, stress corrosion cracking, corrosion fatigue, hydrogen corrosion cracking, wear corrosion, delamination corrosion, etc. In particular, the petroleum and chemical industries as well as the marine atmospheric environment are particularly prominent. In view of the corrosion problem of Roots blower, it is a common method for enterprises to replace equipment parts. However, due to the influence of materials and processing technology, the equipment is generally of high value, such as glass lined equipment, PTFE parts, titanium and other high-value metal materials. One of the effective anti-corrosion measures is to apply organic coating on the surface of polymer composite materials. At present, the Youfushi Blue series is more mature in domestic application. The surface coating protection can be widely used in the repair and pre protection coating of abrasion, cavitation and corrosion parts. It has good chemical resistance, excellent mechanical properties and bonding properties. Compared with the traditional welding repair of pressure vessels, it has the characteristics of simple construction, low cost, safe performance and good repair effect.