| 摘要 |
Two stage positive sealing device for high speed boat propeller shafts, with forced oil circulation for lubricating and cooling purposes provided by an integrated generator. A pump body, formed of an asymmetric static chamber housed within the bronze bushing (11), uses the rotation of the propeller shaft (2) which also functions as a mobile ring, so that the output remains proportional to the needs. Water-free self-lubrication and cooling is provided, so that the seal is useful for boats where high speeds produce a water void at the shaft outlet. There is no uptake of motive power due to the extremely low friction coefficient, the self-alignment function, and the absence of rigid attachment means inducing a strain in the transmission. The seal is floating due to an antirotation device and functions even on worn and twisted shafts without transmitting vibrations to the hull. The seal is devoid of disks or rings fastened to the shaft so as to slide freely, and operates temporarily even in case of seizing. Safety means prevent serious accidents.
|
