| 主权项 |
1. A minimal lubrication device comprising
a lubricant fluid storage reservoir, at least one modular element, means for raising the pressure of said lubricant fluid fed through a lubricant fluid delivery conduit to said at least one modular element, the modular element comprising a lubricant fluid conduit, the lubricant fluid conduit having a lubricant fluid flow regulator valve, a first portion of the lubricant fluid conduit, and a second portion of the lubricant fluid conduit, wherein the lubricant fluid flow regulator valve has a lubricant fluid flow regulator valve inlet and a lubricant fluid flow regulator valve outlet; and a compressed air conduit, the lubricant conduit and the compressed air conduit being in communication with an air/lubricant mixer element, wherein said modular element comprises a pressure compensator device upstream of the lubricant fluid flow regulator valve, wherein said compensator device comprises a lubricant pressure regulator element upstream of the lubricant fluid flow regulator valve and directly controlled by the pressure present downstream of said lubricant fluid flow regulator valve, said compensator device for maintaining substantially constant the lubricant pressure difference measured across the lubricant fluid flow regulator valve by adjusting pressure of lubricant fluid from the compensator device fed to the lubricant fluid flow regulator to compensate for changes in pressure of lubricant fluid discharged from the lubricant fluid flow regulator valve; wherein said compensator device comprises said lubricant pressure regulator element which comprises a slider housed in a seat and defining a first chamber, a second chamber, and a third chamber, wherein the slider comprises a portion within the third chamber arranged to vary the passage cross-section of at least one from among said inlet cross-section and said outlet cross-section by moving the slider, wherein the slider has opposed first and second end walls and sidewalls between the first and second opposed end walls, the first end wall for subjecting to pressure of the first chamber and the second end wall for subjecting to pressure of the second chamber and the slider is movable without rotation; the first chamber defined at least in part by the seat and the first opposed end wall, the second chamber defined at least in part by the seat and the second opposed end wall, the third chamber being between said first chamber and said second chamber, the third chamber communicating via an inlet port with the lubricant fluid delivery conduit, wherein the first portion of the lubricant fluid conduit connects an outlet port of the third chamber and the lubricant fluid flow regulator valve inlet, and the second portion of the lubricant fluid conduit connects the lubricant fluid regulator valve outlet and the air/lubricant mixer element, the first chamber in communication via a third conduit with the first portion of the lubricant fluid conduit which is in communication with the lubricant fluid flow regulator valve inlet; the second chamber in communication via a fourth conduit with the second portion of the lubricant fluid conduit which is in communication with the lubricant fluid flow regulator valve outlet; the compensator device comprising means for increasing the force exerted on the end wall of the slider in the second chamber in addition to the force exerted on the slider by the lubricant present in the second chamber. |
