Static pressure dry gas sealing static ring with radial pressure release valve

Abstract

The invention discloses a static pressure dry gas sealing static ring with a radial pressure release valve. The static pressure dry gas sealing static ring comprises a static ring, a static ring seat,a conical pressure release valve, a spring and a spring seat; the static ring is installed in the static ring seat, one side of the static ring is close to the medium of a sealing cavity, namely theupstream side; the other side of the static ring is close to the medium of a leakage cavity, namely the downstream side; conical holes which are uniformly distributed in the circumferential directionare formed in the static ring, the conical holes are in communication with the sealing cavity medium, and the spring seat, the spring and the conical pressure release valve are sequentially installedin the conical holes; and the spring seat is fixed in the conical holes through threads, a throttling hole, a pressure equalizing groove, a gas collecting groove and a vent hole are formed in the endsurface of the static ring, the throttling hole is formed in the pressure equalizing groove, the vent holes are formed in the gas collecting groove, the vent hole and the gas collecting groove are located on the downstream side, and the vent hole are in communication with the conical holes. According to the static pressure dry gas sealing static ring, the pressure release valve can be opened whenthe pressure of the leakage cavity medium is high, the high pressure medium is discharged from the downstream side of the sealing gap to the sealing cavity, the pressure of the sealed leakage cavity medium can be prevented from being too high, and the reliability of the static pressure dry gas seal for sealing a stirring shaft of a reaction kettle is improved.

Description

technical field [0001] The invention relates to a dry gas sealing structure of a rotary fluid machine, in particular to a static pressure dry gas sealing stationary ring with a radial pressure relief valve, which can be used for rotating shaft seals of various reaction kettles and agitators. Background technique [0002] Due to its good static pressure opening characteristics and load-carrying capacity, static pressure dry gas seals are gradually being used in low-speed rotating machinery (such as reactors and agitators). Especially for pharmaceutical reactors, which do not allow external particulate impurities or seal wear debris to enter the reactor to contaminate the medicine, so the static pressure dry gas seal that can realize non-contact operation has become the first choice for the stirring shaft seal. When the static pressure dry gas seal is used to seal the stirring shaft of the reactor, one side of the sealing end face is a sealing cavity, which has a certain press...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the problem that the existing static pressure dry gas seal is used for the seal of the stirring shaft of the reaction kettle, the throttling gas accumulates in the top cavity of the kettle and causes the pressure inside the kettle to rise, the present invention provides a kind of pressure relief valve with radial Static pressure dry gas seal static ring structure, suitable for reaction kettle and agitator rotary shaft seal under low speed operating conditions

Images