This document describes different types of vane pumps. It discusses unbalanced vane pumps with fixed or variable delivery, and balanced vane pumps. It provides details on how unbalanced vane pumps with fixed delivery work, including how the rotor, vanes, and cam ring interact to draw fluid in and push it out. Pressure-compensated variable displacement vane pumps can vary their eccentricity to adjust delivery. Balanced vane pumps use a double eccentric cam ring to cancel out pressure forces on the shaft bearings. The document lists advantages like self-priming and constant delivery, and disadvantages like need for filtration and relief valves.
This document describes different types of vane pumps. It discusses unbalanced vane pumps with fixed or variable delivery, and balanced vane pumps. It provides details on how unbalanced vane pumps with fixed delivery work, including how the rotor, vanes, and cam ring interact to draw fluid in and push it out. Pressure-compensated variable displacement vane pumps can vary their eccentricity to adjust delivery. Balanced vane pumps use a double eccentric cam ring to cancel out pressure forces on the shaft bearings. The document lists advantages like self-priming and constant delivery, and disadvantages like need for filtration and relief valves.
This document describes different types of vane pumps. It discusses unbalanced vane pumps with fixed or variable delivery, and balanced vane pumps. It provides details on how unbalanced vane pumps with fixed delivery work, including how the rotor, vanes, and cam ring interact to draw fluid in and push it out. Pressure-compensated variable displacement vane pumps can vary their eccentricity to adjust delivery. Balanced vane pumps use a double eccentric cam ring to cancel out pressure forces on the shaft bearings. The document lists advantages like self-priming and constant delivery, and disadvantages like need for filtration and relief valves.
This document describes different types of vane pumps. It discusses unbalanced vane pumps with fixed or variable delivery, and balanced vane pumps. It provides details on how unbalanced vane pumps with fixed delivery work, including how the rotor, vanes, and cam ring interact to draw fluid in and push it out. Pressure-compensated variable displacement vane pumps can vary their eccentricity to adjust delivery. Balanced vane pumps use a double eccentric cam ring to cancel out pressure forces on the shaft bearings. The document lists advantages like self-priming and constant delivery, and disadvantages like need for filtration and relief valves.
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Vane Pump
Vane Pump A rotary vane pump is a positivedisplacement pump that consists of vanes mounted to a rotor that rotates inside of a cavity. In some cases these vanes can be variable length and/or tensioned to maintain contact with the walls as the pump rotates.
Vane Pump There are two types of vane pumps Unbalanced vane pump: Unbalanced vane pump with fixed delivery. Unbalanced vane pump with pressureCompensated variable delivery.
Balanced vane pump.
Unbalanced Vane Pump with
Fixed Delivery The main components of the pump are the cam surface and the rotor. The rotor contains radial slots splined to drive shaft The rotor rotates inside the cam ring. Each radial slot contains a vane, which is free to slide in or out of the slots due to centrifugal force
Unbalanced Vane Pump with
Fixed Delivery The vane is designed to mate with surface of the cam ring as the rotor turns The cam ring axis is offset to the drive shaft axis. When the rotor rotates, the centrifugal force pushes the vanes out against the surface of the cam ring. The vanes divide the space between the rotor and the cam ring into a series of small chambers
Pressure-Compensated Variable Displacement Vane
Variable displacement feature can be
brought into vane pumps by varying eccentricity between the rotor and the cam ring. In this pump, the stator ring is held against a spring loaded piston The system pressure acts directly through a hydraulic piston on the right side. This forces the cam ring against a springloaded piston on the left side. If the discharge pressure is large enough, it overcomes the compensated spring force and shifts the cam ring to the left
Balanced Vane Pump with Fixed
Delivery A balanced vane pump is a very versatile design that has found widespread use in both industrial and mobile applications The rotor and vanes are contained within a double eccentric cam ring and there are two inlet segments and two outlet segments during each revolution
This double pumping action not only gives
a compact design, but also leads to another important advantage: although pressure forces acting on the rotor in the outlet area are high, the forces at the two outlet areas are equal and opposite, completely canceling each other As a result, there are no net loads on shaft bearings
Advantages of Vane Pumps
Vane pumps are self-priming, robust and supply constant delivery at a given speed. They provide uniform discharge with negligible pulsations. Their vanes are self-compensating for wear and vanes can be replaced easily. They are light in weight and compact. They can handle liquids containing vapors and gases. Volumetric and overall efficiencies are high.
Disadvantages of Vane Pumps Relief valves are required to protect the pump in case of sudden closure of delivery. They are not suitable for abrasive liquids. They require good filtration systems and foreign particle can severely damage pump
