Pumps

In general, pumps in vehicles increase the liquid pressure hence increase their total energy. They transfer the mechanical energy provided by the drive motors, to the liquid inside the pump. As a result of that, circulation throughout the vehicle and a reliable operating system is achieved. Pumps support the continuous circulation of the coolant, particularly pumping fuel in automobiles, transfer of oil and radiator coolant as well as providing the circulation inside the heating system. There are separate types of pumps to accomplish these different tasks. As GMW, we provide you various kinds of steering and water pumps.

Steering Pump

Steering pumps are a type of hydraulic rotary vane pump that is preferred in hydraulic systems operating in enclosed areas due to their low noise levels. The flow rate generated by these pumps is high with respect to their external volume, in other words, they have a compact structure with less volume compared with other pumps, making them more efficient in use.

Vane pumps, just like all other hydraulic pumps, are positive displacement pumps. They generate suction by increasing the volume with 180 degrees of rotation of the pump shaft, and compression by decreasing the volume with 180 degrees of rotation at the opposite direction. They perform a non-pressurized transfer if there is no obstacle preventing the pump from transferring the oil, and a pressurized transfer if there is an equipment that causes resistance. Changes in volumes in vane pumps are achieved by placing the stator eccentrically away from the rotor which is connected to the pump shaft. The vanes which can move freely back and forth through the channels opened on the rotor, move away from the rotor by the centrifugal force when the pump shaft is excited and they follow the stators path by being in contact with it. When the pump shaft is excited and it starts to rotate to the right, in the case of a vane pump with a cross section as explained above, the distance between the stator and the rotor starts to increase first; the oil taken in, is pushed to the right by the vanes, then the distance between the rotor and the stator starts to decrease, thus the vanes compress the oil towards this decreasing volume.

Water Pump

Vehicle water pumps circulate the water between the radiator and the engine. The water heats up on its way to the engine and when it returns to the radiator it cools down with the flow of air over the radiator’s fins. This cycle continues all the time while the engine is on to keep the engine at a constant temperature and prevent it from overheating.

Water pumps operate when the engine turns the water pump's belt, which turns the water pump's axle.This axle is connected to series of vanes which rotate with the axle as well. This rotary motion creates suction and pulls the water from the radiator. When the water reaches the pump, centrifugal force throws it against the pump's outer walls and down to the engine block. The water travels through the cylinder heads and drains back to the radiator, where the process starts again.