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The Function of a Gerotor Pump  It is an internal gear pump that has an inner drive gear and outer guided gear. The inner gear does not have as many teeth as the outer gear, it has one less. The inner gear is spun by a prime mover, it turns the larger motor gear. One side of the pumping device, an increase of volume is formed as the gear teeth un-mesh. When it is the other half of the pump it decreases volume.  It also has an unbalanced makeup. Fluid that comes into the pumping device is separated from the discharge...

How a Vane Motor Works Most hydraulic motors work by making an imbalance that makes the shaft turn around. What makes the imbalance is in the differences in the vane area that is unprotected to the hydraulic pressure.  You will see by the picture that the rotor based off center in respect to the ring, the area of the vanes that are  a open to the pressure increase when it aims to the top and lessens at the bottom.  If you have parts of the vanes that are not pressurized with fluids in the inlet, torque begins at the motor...

How It Is Important To Have A Balanced Motor Layout When using a hydraulic motor that has two different pressures to deal with. First is a system working pressure at the inlet, then tank pressure at the outlet. This will give you a side loading shaft that might be sever at high system pressure. If you don’t want that to happen then the shaft side loading on the inner contour of the ring needs to be changed from circular to cam shaped. If you do this configuration the two pressures quadrants oppose each other and the energies will keep the...

Basic Pump Disassembly Part Two Next step to take is to take out the oring, backup ring and square sealing ring from the outlet support plate. Put a mark across the surface of the cartridge kit, the marking will help when you are putting the parts back together. Next take out the screws. Put in the inlet support plate and seal pack subassemblies off the cartridge.  On this next step it is very important not to let the flex side plate to go in with the support plate. Center just enough of the flex side plate to be able to...

Vickers Pump Operations Your fluid flow is always in the pumping cartridge. How the cartridge works is when the rotor is determined by the ring next to the driveshaft, that is coupled to a power source. When the rotor turns, centrifugal force on the vanes, that is helped along by under vane pressure fed from the outlet port. It will cause the vanes to go toward the elliptical inner surface of the ring. Circular movement of the vanes and the turning of the motor makes the chamber volume go between the vanes to rise as the vanes pass the inlet...