PRESSURE REGULATOR FOR THE MEDIA FLOW OF A HYDROSTATIC OR AEROSTATIC BEARING

摘要

The regulator regulates an medium flow fed from a medium supply to a hydrostatic or aerostatic pocket of a bearing, threaded spindle or a guide. The regulator has pressure chambers separated from a control element moved against the force of a spring element. A first pressure chamber actuated with a first pressure level (p1) is connected directly to the medium supply. A second pressure chamber actuated by a second, lower pressure level (p2) is connected to the supply via a first resistor. A third pressure chamber actuated by a third pressure level (p3) corresponding to that in the hydrostatic or aerostatic pocket is connected to the pocket. The control element forms a variable second flow resistance between the second and third pressure chambers, which affects the flow fed to the pocket. The size of this second resistance is increased by the force of a first pressure chamber but is reduced by the effect of the spring force as well as the force of the second and third pressure chambers. A bypass (29) is provided with a third, preferably fixed, flow resistor (33). The third resistor is connected to the hydrostatic or aerostatic pocket and also, via the first resistor (21), to the medium supply.