An oil-sealed direct-driven rotary vane vacuum pump is a type of vacuum pump commonly used in industries to create a vacuum by removing air or other gases from a system. This pump operates through a direct-drive mechanism and utilizes oil for lubrication and sealing purposes.
1. Rotary Vane Mechanism: The core component of the vacuum pump is the rotary vane mechanism, similar to the belt-driven variant. It consists of a rotor with multiple vanes attached to it. As the rotor rotates within the pump housing, the vanes slide in and out due to centrifugal force and contact with the inside surface of the pump housing.
2. Intake Phase: During the intake phase, the vanes slide outwards due to rotation, creating expanding volumes. This allows gas to enter the pump through the intake port. As the rotor continues to rotate, the gas is trapped between the vanes and carried towards the exhaust port.
3. Compression Phase: In the compression phase, the volume between the vanes decreases as they move towards the center of the rotor due to centrifugal force and the tapering shape of the pump housing. This compression action results in an increase in pressure within the gas.
4. Exhaust Phase: As the vanes reach the smallest volume, the gas is compressed to a higher pressure. It is then pushed towards the exhaust port and discharged from the pump.
5. Lubrication and Sealing: Similar to the belt-driven variant, the oil-sealed direct-driven rotary vane pump requires oil for lubrication and sealing purposes. The oil helps to seal the gaps between the vanes and the pump's interior, preventing gas leakage. It also lubricates the vanes and other moving parts, reducing friction and wear.
In conclusion, the oil-sealed direct-driven rotary vane vacuum pump is a reliable and efficient solution for generating a vacuum in various industries. Its direct-drive mechanism, use of oil for lubrication and sealing, and advantages such as simplified design, energy efficiency, and high reliability make it a preferred choice for many vacuum applications.