Roots blower
Roots blower fan for the volume , the amount of air delivered is proportional to the number of revolutions , clover impeller rotate once every two from the three impeller suction and discharge , compared with two leaf type , gas pulsation is reduced, load change small , high mechanical strength , low noise and vibration is also small. In the two level relative row axis has two trefoil impeller wheel and the elliptical surface of the chassis and the wheel bore always among slight gap are oppositely oriented as uniform rotation of the impeller , the housing and the impeller is surrounded by a certain amount of gas from the suction side to the discharge side of transport . Impeller is always generated by each branch to maintain the correct phase synchronous gear , the phenomenon does not appear to touch each other , which can high-speed, no internal lubrication , simple structure , stable operation , stable performance, adapt to a variety of uses , has been used in a wide range of fields.
Roots blower with high efficiency, high precision , low noise , long life , compact structure , small size , light weight, easy to use features , products widely used throughout the petrochemical , building materials, electric power, metallurgy , chemical fertilizer, mining, ports , light textile , food, paper , aquaculture and sewage treatment, environmental protection industry and many other fields , mostly used for conveying air can also be used to transport gas, hydrogen , acetylene, carbon dioxide and other flammable, explosive and corrosive gases.
2 Roots blower common faults and repair techniques
2.1 Corrosion protection pump chamber
Metal corrosion morphology, can be divided into full ( uniform ) corrosion and localized corrosion two categories. The former occurs more uniform the entire surface of the device , which only occurs locally . Such as pitting , crevice corrosion , intergranular corrosion, stress corrosion cracking , corrosion fatigue , hydrogen corrosion cracking , wear, corrosion, delamination and corrosion . Especially petroleum , chemical industry and marine atmosphere is particularly prominent.
For equipment corrosion problems, frequent replacement of equipment components are present, enterprises commonly used method , but also by the materials and processing equipment and other aspects, universal values high . For example glass-lined equipment , PTFE parts, high value titanium metal materials .
2.2 rotor shaft keyway damage
Because by the equipment operation and environmental factors, the device often shaft , keyway wear damage phenomenon , the question arises , in accordance with traditional methods to brush after welding or machining repaired. However, high thermal stress generated by welding can not be completely eliminated , prone to bend or break ; electrical brush restricted by the coating thickness , is easily peeled off ; these methods are also repaired with metal metal , can not change the " hard-on- hard" with the relationship the combined effects of various forces , still cause wear again .
2.3 shell cracks governance
Equipment parts due to casting, machining defects or internal stress , overload operation and other reasons often lead to cracks or equipment parts breakage . The repair method is the use of conventional welding . Welding often cause parts to thermal deformation or thermal stress , especially thin-walled parts . And some part material is cast iron, aluminum, titanium materials for a class of difficult to weld . There are also prone to explosion hazards , such as the petrochemical industry , etc., is more difficult welding repair method , severely limits the corporate level of repair and maintenance of equipment , increasing the company's operating costs.
Roots blower fan for the volume , the amount of air delivered is proportional to the number of revolutions , clover impeller rotate once every two from the three impeller suction and discharge , compared with two leaf type , gas pulsation is reduced, load change small , high mechanical strength , low noise and vibration is also small. In the two level relative row axis has two trefoil impeller wheel and the elliptical surface of the chassis and the wheel bore always among slight gap are oppositely oriented as uniform rotation of the impeller , the housing and the impeller is surrounded by a certain amount of gas from the suction side to the discharge side of transport . Impeller is always generated by each branch to maintain the correct phase synchronous gear , the phenomenon does not appear to touch each other , which can high-speed, no internal lubrication , simple structure , stable operation , stable performance, adapt to a variety of uses , has been used in a wide range of fields.
Roots blower with high efficiency, high precision , low noise , long life , compact structure , small size , light weight, easy to use features , products widely used throughout the petrochemical , building materials, electric power, metallurgy , chemical fertilizer, mining, ports , light textile , food, paper , aquaculture and sewage treatment, environmental protection industry and many other fields , mostly used for conveying air can also be used to transport gas, hydrogen , acetylene, carbon dioxide and other flammable, explosive and corrosive gases.
2 Roots blower common faults and repair techniques
2.1 Corrosion protection pump chamber
Metal corrosion morphology, can be divided into full ( uniform ) corrosion and localized corrosion two categories. The former occurs more uniform the entire surface of the device , which only occurs locally . Such as pitting , crevice corrosion , intergranular corrosion, stress corrosion cracking , corrosion fatigue , hydrogen corrosion cracking , wear, corrosion, delamination and corrosion . Especially petroleum , chemical industry and marine atmosphere is particularly prominent.
For equipment corrosion problems, frequent replacement of equipment components are present, enterprises commonly used method , but also by the materials and processing equipment and other aspects, universal values high . For example glass-lined equipment , PTFE parts, high value titanium metal materials .
2.2 rotor shaft keyway damage
Because by the equipment operation and environmental factors, the device often shaft , keyway wear damage phenomenon , the question arises , in accordance with traditional methods to brush after welding or machining repaired. However, high thermal stress generated by welding can not be completely eliminated , prone to bend or break ; electrical brush restricted by the coating thickness , is easily peeled off ; these methods are also repaired with metal metal , can not change the " hard-on- hard" with the relationship the combined effects of various forces , still cause wear again .
2.3 shell cracks governance
Equipment parts due to casting, machining defects or internal stress , overload operation and other reasons often lead to cracks or equipment parts breakage . The repair method is the use of conventional welding . Welding often cause parts to thermal deformation or thermal stress , especially thin-walled parts . And some part material is cast iron, aluminum, titanium materials for a class of difficult to weld . There are also prone to explosion hazards , such as the petrochemical industry , etc., is more difficult welding repair method , severely limits the corporate level of repair and maintenance of equipment , increasing the company's operating costs.
