A geared flow divider is designed to accurately and efficiently divide flow from a single source. They can be used to synchronise hydraulic cylinders and, with the addition of unloading solenoids, be used to intensify pressures. Without the inclusion of a rotary flow divider, the cylinder with the least friction or resistance to its movement will move first. If not mechanically linked this cylinder will usually continue to move to It’s end point, then the next cylinder will start to move. This can be an undesirable operation and could lead to jamming or unwanted mechanical stress.
Rotary flow dividers usually have an accuracy of around +/- 2%. In some cases this will be unacceptable and it will then require the use of electro-proportional valves with cylinder position feedback, introducing further system complexities. A flow divider is a cost-effective alternative to this.
Flow dividers come in many configurations. They can have elements with equal displacement or unequal displacement depending on the required operation. Each element can have relief valves fitted and unloading solenoids for control. Other options include phase correction, anti-cavitation valves and the option to include a hydraulic motor drive connected to the elements.
The power put into a flow divider will equal the power out of the flow divider minus losses. Therefore:
PinQin=Prequired + P1Q1 + P2Q2 + …. + PnQn
Pin = Inlet Pressure
Qin = Inlet flow
P1, P2 ,…, Pn = outlet pressures
Q1, Q2, …., Qn = Outlet flows
Prequired = pressure required to rotate the flow divider. (this can be assumed to be 5 bar)
At Denley hydraulics we strive to obtain a full understanding of the whole system that we will integrate into. Giving us the ability to find alternative solutions that may be more suitable to the application when designing systems. For more information please don’t hesitate to contact us.