Patent ID: 7204490

Claim:
A shaft-sealing device having an inner modular structure comprising: a shaft tube having a first end on which provided with an annular end flange and at least one engaging notch thereof, and a second end connecting with the first end; a retaining ring member arranged on the shaft tube, the retaining member provided with at least one first engaging tooth and at least one second engaging tooth oppositely extended therefrom in a longitudinal direction, and the first engaging tooth engaged with the engaging notch of the shaft tube; a rotary ring member arranged on the shaft tube, the rotary ring member provided with at least one engaging recession engaged with the second tooth of the retaining ring member; a resilient ring member arranged on the shaft tube, and disposed between the annular end flange of the shaft tube and the retaining ring, the resilient ring member having a first end abutting against the annular end flange of the shaft tube, and a second end further abutting against the retaining ring; and at least one sealing gasket arranged on the shaft tube, and disposed between the retaining ring and the rotary ring member; wherein the resilient ring member, the retaining ring member, the sealing gasket and the rotary ring member is successively assembled on the shaft tube in a longitudinal direction to constitute the inner modular structure for combining with a rotary machine; wherein the shaft-sealing device has a main body connected to a rotary machine, and a positioning ring received in the main body; wherein the shaft tube is mounted to a rotary shaft of the rotary machine by fixing members; wherein the second end of the shaft tube includes a plurality of screw boles to receive the fixing members such that the fixing member securely mounts the shaft tube on the rotary shaft of the rotary machine; wherein a stop ring mounts the shaft tube to the rotary shaft of the rotary machine; wherein an auxiliary positioning hook connects between the main body of the rotary machine and the stop ring, thereby the auxiliary positioning hook which serves to maintain a spaced relationship between the main body and the stop ring prior to installation; after installing the shaft-sealing device, removing the auxiliary positioning hook from the stop ring.