What are two types of vane pumps?

Vane pumps are essential components in hydraulic systems, known for their efficiency, reliability, and versatility.

External Vane Pumps:

External vane pumps, also known as rotary vane pumps, feature a cylindrical housing with an eccentrically placed rotor inside. The rotor contains several vanes, typically made of self-lubricating materials such as graphite or composite materials. The vanes are free to slide in and out of slots within the rotor, maintaining contact with the inner surface of the housing and creating chambers of varying volume.

Internal Vane Pumps:

Internal vane pumps, also referred to as inside vane pumps, have a different design compared to external vane pumps. They feature a rotor with vanes that is placed inside a cam ring or stator. The cam ring has specially designed lobes or contours that control the movement of the vanes. As the rotor rotates, the vanes are pushed in and out due to the cam ring’s shape.

Comparison and Applications:

Both external and internal vane pumps have their unique characteristics and advantages, making them suitable for different applications within the hydraulic industry. External vane pumps are known for their simplicity, compact size, and versatility in handling a wide range of fluid viscosities. They are commonly used in automotive systems, mobile hydraulic equipment, and various industrial applications.