Laird’s three-screw pump is composed of a single rotor element that is powered, while two others are idle. Spindle screw pumps move fluid axially without turbulence, eliminating foaming that would otherwise occur in viscous fluids. The idle rotors are rotated by liquid pressure, essentially generating a fluid bearing, or hydrodynamic film, that provides radial support similar to journal bearings.
The self-priming spindle screw pumps allow an independent, flexible positioning within the liquid cooling system. Respective to the cost of ownership, the value of a highly reliable spindle screw pump is through long lifetime operation that can span several years with minimal to no maintenance. This minimizes down time by eliminating the need to turn off the end-user system for pump replacement.
The pump head and motor are combined into one waterproof housing unit and can push either oil or water coolant. The fluid is pushed uniformly with the rotation of the spindles along the axis and is forced out the other end, which reduces power consumption and increases efficiency. In addition, pressure changes have little effect on spindle screw pumps, making them ideal for a range of applications.