| 摘要 |
A device includes a rotor (5), a stator (2) and different types of liquid pocket sliders (3; 4; 10), each type with different and specific functions, the liquid pocket sliders preferably being mounted at the outermost surface of the rotor. The device can include ordinary pocket sliders (3), with the function of load support and bearing self-centering on the rotor (5); “sentinel” pocket sliders (4) having the function of predicting failures and/or monitoring the distribution of the load around the rotor; preload pocket sliders (10), with the function of compensating for possible unbalance of the rotor at a given velocity. |
| 主权项 |
1. Rotation device comprising:
a rotor (5) integral with a rotation shaft (1), a stator (2) coaxial with the rotor (5) and which faces directly on the external periphery of the rotor (5), forming an annular interspace with respect to the latter, liquid pocket sliders (3; 4; 10) comprising a membrane (8) for containing a liquid and functioning as radial bearings during the rotation of the rotor (5), said membrane (8) being characterized by a tension (τ) and by a high elastic modulus (E), i.e. substantially rigid upon traction, said rotation device providing for means for preloading the liquid pocket sliders (3; 4; 10) against a respective relative slide surface, characterized in that said liquid pocket sliders (3; 4; 10) are mounted inside said peripheral annular interspace by fixing the edge of their membrane (8 or 9) to a mounting surface inside the stator (2) or to a mounting surface outside the rotor (5), the surface opposite the mounting surface constituting said relative slide surface; and wherein, given an estimated maximum of the possible unbalance (e) of the rotor (5), and given a maximum design angular velocity (ωM) of the rotor (5), the centripetal reaction force exerted by said liquid pocket sliders (3; 4; 10) on the rotor (5) is such to prevent resonances by limiting the amplitude of the oscillations due to possible small misalignments between the rotor (5) and the stator (2) and/or due to the centrifugal force Mω2e for each rotation velocity ω≦ωM, given that “M” is the mass of the rotor (5) including the shaft (1); and wherein the elastic rigidity (dW/dδ) of said liquid pocket sliders (3; 4) is such that the total force (fT) acting on the rotor has a local minimum at d=0. |
