What is the driving and driven rotor?
In a Roots blower, there are two rotors with two lobes or three lobes. These rotors work together to compress the air or gas that passes through the blower.
The rotors in a roots blower are the two lobed impellers that rotate inside the blower casing. These rotors are designed with specific helical profiles that intermesh with each other and create a seal against the blower casing. As the rotors rotate, they trap air between the lobes and transport it from the inlet to the outlet of the blower. The rotation of the rotors causes the air to be compressed and forced out at a higher pressure than the inlet. The rotors are typically made from high-strength materials, such as cast iron or steel, to withstand the high stresses and temperatures generated by the blower operation.
The driving rotor is typically connected to the motor or engine that powers the blower. This rotor drives the movement of the driven rotor.
The driven one is the other rotor that meshes with the driving one. It is driven by the driving rotor, and the two rotors work together to create compression and move air or gas through the blower. The driven rotor rotates in the opposite direction of the driving rotor.
The two rotors are typically constructed with two or three lobes each. The lobes of the driving rotor mesh with the lobes of the driven rotor, creating a series of pockets that expand and contract as the rotors rotate. As the pockets expand, they draw in air or gas. As the pockets contract, they compress the air or gas and push it through the outlet of the blower.
The design and positioning of the rotors are critical to the performance of the Roots blower. If the rotors are not aligned or if there is too much clearance between them and the housing, the blower’s efficiency may be reduced.