The biggest feature of Roots blower is that when the pressure is adjusted within the allowable range, the flow changes little, the pressure selection range is very wide, and it has the characteristics of forced gas transmission. The medium does not contain oil during transportation. Simple structure, convenient maintenance, long service life and low vibration of the whole machine. Vacuum pump. The periodic suction, exhaust and instantaneous constant volume compression cause the pulsation of gas flow velocity and pressure, which will produce large aerodynamic noise. In addition, the clearance between rotors and between rotors and cylinders will cause gas leakage, thus reducing efficiency. The displacement of Roots blower is 0.15~150 m3/min, and the rotating speed is 150~3000 rpm. The single stage pressure ratio is usually less than 1.7, up to 2.1, and can be used in series.
Roots blower can be divided into two leaf type and three leaf type according to the shape of rotor. The three blade rotor is sucked and exhausted three times by two rotors every time it rotates. Compared with the two blade type, the gas pulsation is small, the vibration is small, and the noise is low
When Roots blower is used in summer and winter, the inspection density of the blower should be increased from 1 to 2 times a day to 3 to 4 times. In case of failure, the blower should be shut down for inspection. For water-cooled Roots blower, attention shall be paid in winter to prevent the water-cooling pipe from freezing or cracking, and the water inside the water-cooling pipe shall be cleaned when it is shut down.
In summer, the inlet air temperature of Roots blower is generally controlled below 40 ℃. If the temperature exceeds this temperature, the Roots blower may be overheated and the motor is easy to burn. The low temperature in some areas may also be related to altitude. If the altitude is high and the temperature is low, special attention should be paid to the selection of Roots blower. The selection cannot be carried out according to normal conditions. Altitude has an impact on air volume and pressure. The general type roots blower is mainly placed above the ground, and the ambient temperature will affect the roots blower and shorten its service life. Therefore, it is better to build a fan room to effectively control the ambient temperature and protect the roots blower.
The operating requirements of Roots blower are that the temperature of the conveyed inlet medium shall not be higher than 40 ℃, the content of particulate impurities in the medium shall not be greater than 1000mg/m3, and the maximum size of particles shall be less than 0,1mm. When boosting, the rated boosting value specified on the fan nameplate shall not be exceeded. Due to the special structure of Roots blower, there are many differences between Roots blower and other fans in operation requirements, which must be noted.
After the Roots blower operates normally, the operator should closely watch the operating conditions of all parts, and observe the temperature of all parts of the machine, the vibration of the machine, and the noise of the muffler at any time. If there is any abnormality, stop the machine immediately.
The working environment temperature of Roots blower shall not exceed 40 ℃. If it exceeds 40 ℃, measures shall be taken to reduce the temperature, otherwise the service life of the blower will be shortened. When the fan is configured outdoors, please set up a rain proof shed. The foundation design shall comply with the relevant provisions of the national mechanical equipment installation project. The foundation shall be built on hard soil, 100-250 mm higher than the ground, and 800-1500 mm deep. The bearing surface of the foundation shall be 100-250 mm wider than the base, and its foundation shall not be firmly connected with other buildings and wall foundations. Sufficient space shall be reserved around the fan to meet the needs of maintenance and disassembly.
Before installation, remove the welding slag and other foreign matters in the pipeline, and place the valve in the fully open state, otherwise the fan will be overloaded and damaged. Check and add gear oil. When leaving the factory, the oil tank may not be filled with gear oil. Please check and fill the gear oil. In the shutdown state, add oil to the center of the oil window. Excessive oil filling will lead to oil leakage.
Check the tightness of the narrow V-belt and the belt pulley deviation. The belt pulley deviation can be adjusted with a ruler. After using for a period of time, the belt will become loose, so it needs to be readjusted. Check whether the power supply voltage and frequency meet the requirements of the nameplate. Check the rotation direction of the belt pulley. Observe the rotation direction of the belt pulley when facing the belt pulley. The rotation direction of the belt pulley should be consistent with the rotation sign arrow.
Roots blower can also be used in winter, and can be used in the environment of minus 30 degrees Celsius. Pay more attention to the use of roots blower in winter. Low temperature environment and high temperature environment will damage the roots blower.
I believe that after reading the above content, you should also understand the temperature requirements of Roots blower during operation. I hope it will be helpful to you.
Text label: Roots blower
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