| 摘要 |
971,847. Bearings; balancing shafts. LANDIS-GENDRON S.A. March 5, 1963 [March 6, 1962; Feb. 27, 1963], No. 8736/63. Headings F2A and F2U. A fluid bearing for supporting a shaft has a housing provided with a bore, at least one annular chamber which is supplied with pressurized fluid, and an annular passage which connects the chamber with the bore and which restricts the flow of the fluid. In an embodiment, the housing comprises members 101, 102, Fig. 1, which are held together by a screw 103. In use, pressurized fluid is supplied through an orifice 108 and is received by the annular chamber 106, from where it flows through the annular passage 107 to the bore 104 and finally is returned to the source by means of grooves 111, 112 and conduits 113, 114. When the shaft 105 is off-centre and it approaches the surface of the bore, the output from the passage 107 is reduced at this position and pressure builds-up to raise the shaft. In another embodiment, an automatic balancing system is mounted on-a shaft 2, Figs. 4 and 6, supported by the fluid bearing which also controls the balancing function. The balancing system comprises a cylinder 1, the interior of which is divided into chambers 17-19 by rollers 11-13. The chambers 17-19 are connected by channels 21-23, in the shaft 2, to the pressurized fluid in the bearing. In use, variation in pressure in any of the chambers is effected by the bearing so as to move the rollers and counteract unbalance. Movement of the rollers is limited by stops 15. In modifications, the annular passage is replaced by porous material 51, Fig. 9; recesses 117, 118, Figs. 10 and 11, are provided; two annular passages are provided; and the annular passage is replaced by a conical bore 53, Fig. 16. |
