Injection of sealant for pressure sealant type rotary seal

• US 20110074115A1
• Filed: 09/30/2009
• Published: 03/31/2011
• Est. Priority Date: 09/30/2009
• Status: Abandoned Application

• Current Assignee: Tamar Technological Development, Ltd.
• Original Assignee: Tamar Technological Development, Ltd.
• Inventors: Cohen Zada Vaizman, Roni
• Application Number:
  US12/587,025
• Publication Number:
  US 20110074115A1
• Time in Patent Office: Days
• US Class Current: 277/513
• CPC Class Codes: F16J 15/181 for plastic packings

Abstract

An insert for a pressure sealant type sealing system, an improved sealing system for sealing between an aperture of a machine housing and a rotating shaft of the machine protruding through the aperture, comprising the insert to provide a pair of outlets into the driveshaft arranged collinearly around the driveshaft, a method of injecting the sealant into the stuffing box in two positions on opposite sides of the drive shaft thereby balancing the pressure, and a method of retrofitting existing pressure sealant systems by retrofitting with the insert.

Claims

1. An improved sealing system for sealing between an aperture of a machine housing and a rotating shaft of the machine protruding through the aperture, said sealing system comprising:

(i) a stuffing box for encasing a segment of said shaft and the aperture of the machine housing;

(ii) a viscous fluid type sealant within said stuffing box, wherein the shaft is concentric about its axis of rotation, and

(iii) a sealant injector coupled to the stuffing box via a conduit system having an inlet for coupling to the sealant injector and

(iv) a plurality of outlets into the driveshaft arranged radially symmetrically around the driveshaft to inject the sealant into the stuffing box in a plurality of positions around the drive shaft thereby balancing the pressure.

2. The system of claim 1 wherein said plurality of outlets comprises two outlets arranged collinearly on opposite sides of the driveshaft.

3. The system of claim 2 wherein the sealant inlet is arranged equidistantly to the two outlets.

4. The system of claim 3 wherein the inlet and driveshaft are on a radius of the stuffing box that is perpendicular to diameter coupling the outlets and driveshaft.

5. The system of claim 1 wherein the outlets direct the sealant into the stuffing box in a direction substantially perpendicular to the driveshaft.

6. The system of claim 1 wherein the improved sealing system comprises an insert to the stuffing box and the conduit system comprises a conduit between said insert and said stuffing box.

7. A method of reducing vibrations to a drive shaft of a sealing system by injecting sealant into the sealing system symmetrically at a plurality of positions around the driveshaft at a constant pressure at each position.

8. The method of claim 7 wherein the plurality of injection positions includes two injection positions arranged on opposite sides of the driveshaft.

9. The method of claim 8 wherein sealant injection at the two injection positions is through outlets directed in a direction along the driveshaft.

10. An insert for insertion into a stuffing box of a pressure sealant type sealant system around a driveshaft, the insert for providing a conduit around the driveshaft between an inlet for coupling to a sealant injector and a plurality of outlets arranged around symmetrically about the driveshaft.

11. The insert of claim 10 wherein said plurality of outlets comprises a pair of outlets.

12. The insert of claim 10 wherein the outlets are directed into the stuffing box in a direction along axis of the driveshaft.

13. A method of improving a pressure sealant type sealant system having a sealant injector directed at the driveshaft comprising retrofitting an insert as claimed in claim 10 into the stuffing box.