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.

Operating Principle:

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.

Advantages of Oil-Sealed Direct-Driven Rotary Vane Vacuum Pump:

• Simplified Design: The direct-drive mechanism eliminates the need for a belt and pulley system, simplifying the pump's overall design and reducing potential points of failure.
• Compact Size: Removing the belt and pulley system results in a more compact design, making the pump easier to install in limited space environments.
• Energy Efficiency: Direct-drive pumps typically offer better energy efficiency as the power is transmitted directly from the motor to the pump without loss due to belt slippage or inefficiencies.
• Reduced Maintenance: With fewer moving parts, this type of vacuum pump generally requires less maintenance and has a lower chance of component failure.
• High Reliability: The direct-drive mechanism enhances the pump's overall reliability, ensuring continuous operation without the need for frequent maintenance or interruptions.
• Wide Operating Range: Oil-sealed direct-driven rotary vane vacuum pumps can handle a wide range of vacuum levels, making them suitable for various applications and processes.

Product Range:

• 1.5m³/hr, 2.5m³/hr, 6m³/hr, 12m³/hr, 15m³/hr, 21m³/hr, 18m³/hr, 30m³/hr, 60m³/hr
• Ultimate total pressure without gas ballast 10^-4 mbar
• Ultimate total pressure with gas ballast 10^-2 mbar

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.