Monitoring type dynamic pressure sealing device and method for monitoring opening and closing state of sealing end face

Abstract

The embodiment of the invention provides a monitoring type dynamic pressure sealing device and method for monitoring the opening and closing state of a sealing end face so as to solve the problem thatthe critical rotating speed of the opening and closing state of a sealing end face cannot be accurately judged in real time in the prior art. The monitoring type dynamic pressure sealing device comprises a sealing moving ring, a sealing static ring, a static ring gasket, a static ring seat, an elastic element and a sensor assembly. According to the embodiment of the invention, the sensor elementis used for detecting a shearing resistance value for preventing the sealing static ring from rotating; under the condition that the shearing resistance is reduced, it is determined that the sealing end face between the sealing moving ring and the sealing static ring is opened; under the condition that the shearing resistance is increased, it is determined that the sealing end face between the sealing moving ring and the sealing static ring is closed; and under the condition that the shearing resistance is not changed, it is determined that the opening and closing state of the sealing end facebetween the sealing moving ring and the sealing static ring is not changed. During use of a seal, the rotating speed can be rapidly increased until the seal end face is opened, a wear rotating speedinterval can be effectively avoided, and seal end face wear failure caused by long-time non-opening of the seal end face is avoided.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of sealing, and in particular to a monitoring dynamic pressure sealing device and method for monitoring the opening and closing state of a sealing end face. Background technique [0002] The speed at which the sealing end face is closed and opened (opening and closing state) is called the critical opening speed, which is an important parameter to characterize the opening performance of the seal. The moment the seal end face is opened, the leakage of the seal will change significantly. Judging the transition of the seal opening and closing state by observing the sudden change of the leakage of the seal is a common method for monitoring the opening and closing state of the seal. Its disadvantages are: the change of leakage rate may not be obvious due to the influence of environmental factors, and the leakage channel (leakage cavity, tube) is long, and there is a lag in the phenomenon...

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Problems solved by technology

[0003] The embodiment of the present invention provides a monitoring dynamic pressure sealing device and method for monitoring the opening and closing state of the sealing end face, so as to solve the problem in the prior art that the critical speed of the opening and closing state of the sealing end face cannot be judged in real time and accurately

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