SU922387A1 - Floating sealing ring of slot seal - Google Patents

Description

(54) FLOAT GASKET RING OF THE ANCHORAGE SEAL

one

This invention relates to mechanical engineering, in particular, to floating-type seals.

A floating sealing ring of a slit seal is known, having micro grooves on the inner surface 1.

The disadvantages of floating rings, limiting their use in compressor engineering, are: low carrying capacity and wear of the ring when starting and stopping the maschine.

The purpose of the invention is to increase the reliability of the floating sealing ring by increasing the carrying capacity and eliminating wear during start and stop.

This goal is achieved in that the micro grooves are made in the loaded region of the bearing surface of the ring in the form of closed loops communicated with the high-pressure cavity by at least one micro groove.

FIG. 1 shows a sealing assembly with a floating ring, a longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a view B in FIG. 1 (option 1); in fig. 4 - also, option 2.

A floating ring 2 is installed on the rotating shaft 1. In the casing 3 of the seal, a pin 4 is pressed in, protecting the ring 2 from turning and fixing the position of the micro-grooves 5 in the loaded

5 areas of the bearing layer of the ring relative to the shaft. Micro-grooves 5, having usually a profile angle of 60 °, are cut by a cutter or a milling cutter. The number of grooves depends on the compacted differential pressure, the type of working Q whose medium, shaft diameters, dimensions and weight of the ring. The preferred location of the grooves in the loaded area of the carrier layer is symmetrical about the vertical axis of the ring. With wide rings and large compacted shaft diameters, the microcavities can form closed loops of various shapes, for example, rectangular, communicated with the cavity to be filled with one or several axial grooves.

20 The sizes of microsinks (length, depth, width) are chosen in such a way that their total volume does not lead to a pneumatic hammer type hydrodynamic instability during the operation of the floating ring.

Claims (1)

Claim A floating sealing ring of a gap seal having micro grooves on the inner surface 5, characterized in that, in order to increase reliability by increasing the bearing capacity and eliminate wear during start-up and shutdown, the micro grooves are made in the loaded region of the bearing surface of the ring in the form of closed ²⁰ circuits connected with a high-pressure cavity of at least one micro-groove.