Roots blower has a stable large pumping speed, which can quickly discharge the gas suddenly released, making up for the shortcomings of oil sealed mechanical pump and diffusion pump, and is suitable for use as a mechanical booster pump. It has a stable large pumping speed, and can quickly discharge the suddenly released gas, which makes up for the shortcomings of oil sealed mechanical pump and diffusion pump, and is suitable for use as a mechanical booster pump.
Advanced design, reasonable structure, clearance between rotors and between rotors and pump body, no contact, no lubrication, small friction loss, larger pumping speed can be obtained with lower power, which has significant energy-saving effect.
The rotor has good geometric symmetry and works stably. It can obtain large pumping speed by increasing the rotating speed, thus achieving compact structure, small volume and light weight. There is no gas compression in the pump chamber, and there is a gap between moving parts, which is insensitive to dust and water vapor in the aspirated gas, so condensable steam can be extracted. The moving parts in the pump cavity do not need oil lubrication, which can avoid the pollution of oil vapor to the vacuum system and is conducive to obtaining oil-free vacuum.
Roots blower does not need inlet and exhaust valves, with simple structure, low noise, non-contact moving parts in the pump chamber, and low maintenance cost. Roots blower starts quickly and can reach the limit vacuum in a short time. There are two transmission modes of Roots blower: direct connection and belt connection. Usually, belt transmission is used. Because the speed of the direct connected blower is synchronous with the speed of the motor, while the speed of the ordinary 4-level motor is 1470 rpm. The cost of using other technologies is high, so most of the companies generally use 4-level motors. Belt transmission is economical and durable.
The rotating speed of Roots blower depends on the size and model of the blower. The small blower can rotate at a higher speed than the 2113 blower, which is mainly due to the precision of the dynamic 5261 balancer during the production and manufacturing of the blower. The higher the precision, the higher the rotating speed can be. However, the precision of the dynamic balancer 4102 is limited in the world at present, and the rotating speed of all large fans is lower, A small fan can rotate faster. When selecting the fan, it is better to select medium and low speed for 1653 to avoid high speed, so as to prolong the service life of the fan.
Generally speaking, the fan speed below 1 ton should be below 2000 rpm, the fan speed above 1 ton should be controlled at 1000-2000 rpm, and the fan speed above 200 diameters should be below 1000 rpm.
Roots blower is faced with this problem when it is driven by V-belt. The speed of Roots blower is different from that of motor, which can be calculated by the following formula: motor speed * motor speed=fan speed * fan speed
It is not difficult to see from this formula that as long as the size of the Roots blower pulley is constant, and the rotation speed of the Roots blower can be found from the instructions through the requirements of flow and pressure parameters, the rotation speed of the Roots blower must also be good, and the rotation speed of the motor is also constant, then it is easy to calculate the size of the motor pulley.
I believe that after reading the above content, you should also understand the calculation method of Roots blower speed, and I hope it will be helpful to you.
Text label: Roots blower
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