VANE PUMP

Vane pumps are hydraulic pumps that operate at very low noise levels. Hydraulic vane pumps operate with much lower flow pulsation. constant flow. As such, vane pumps produce less noise while maintaining a relatively high speed of up to 3,000 rpm. Small hydraulic vane pumps like the Parker Denison T7A or T7B, with a higher displacement volume of 50 cc, have a maximum speed of 3,600 rpm at hydraulic system pressures of up to 300 bar intermittent.

VANE PUMP

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ADVANTAGE & DISADVANTAGE

• Handles thin liquids at relatively higher pressures
• Compensates for wear through vane extension
• Sometimes preferred for solvents, LPG
• Can run dry for short periods
• Can have one seal or stuffing box
• Develops good vacuum

• Can have two stuffing boxes
• Complex housing and many parts
• Not suitable for high pressures
• Not suitable for high viscosity
• Not good with abrasives

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WORKING PRINCIPLE

• The schematic of the vane pump working principle is shown in figure. Vane pumps generate a pumping action by tracking of vanes along the casing wall.
• The rotor in a vane pump is connected to the prime mover through a shaft. The vanes are located on the slotted rotor.
• The rotor is eccentrically placed inside a cam ring as shown in the figure. The rotor is sealed into the cam by two side plates.

• When the prime mover rotates the rotor, the vanes are thrown outward due to centrifugal force. The vanes track along the ring.
• It provides a tight hydraulic seal to the fluid which is more at the higher rotation speed due to higher centrifugal force. This produces a suction cavity in the ring as the rotor rotates. It creates a vacuum at the inlet and therefore, the fluid is pushed into the pump through the inlet.

TYPE AND APPLICATION OF VANE PUMP

VANE PUMPS TYPE

1. Unbalanced vane pump
2. balanced vane pump

APPLICATION OF VANE PUMPThese pumps have various applications for the pumping of the following fluids:

• Aerosol and Propellants
• Aviation Service – Fuel Transfer, Deicing
• Auto Industry – Fuels, Lubes, Refrigeration Coolants
• Bulk Transfer of LPG and NH3
• LPG Cylinder Filling
• Alcohols
• Refrigeration – Freons, Ammonia
• Solvents

• Unbalanced vane pump with fixed delivery.
• Unbalanced vane pump with pressure-compensated variable delivery.

• balanced vane pump with fixed delivery.
• balanced vane pump with pressure-compensated variable delivery.

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