Intelligent regulation system and method for mechanical seal

Patent metadata

Field	Value
Publication number	US-11199264-B2
Application number	US-201817257535-A
Country	US
Kind code	B2
Filing date	Jul 16, 2018
Priority date	Jul 2, 2018
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

An intelligent regulation system for a mechanical seal, the system comprising: a monitoring device for measuring a signal correlated with a seal in real time; a control device, comprising a state determination module, a feasible region analysis module, an evaluation module and an optimizing module, wherein the state determination module unscrambles the signal obtained by the monitoring device to estimate the state of the seal; the feasible region analysis module determines, according to a current state, a state that the seal can reach by means of the regulating effect of a regulating device; the evaluation module evaluates a value for the state of the seal; and the optimizing module searches a feasible region, where the seal is regulated, for a regulating method with a relatively high value to the greatest extent, and accordingly sends an instruction to the regulating device; and the regulating device for actively applying an action to the seal according to the instruction given by the control device.

First claim

What is claimed is:

1. An intelligent regulation system for mechanical seal, comprising:
a monitoring device measuring seal-related signals in real-time;
a control device; and
an adjustment device actively applies action on a seal according to instructions given by said control device,
wherein said control device comprises a state determination module, a feasible region analysis module, an evaluation module, and an optimization module, wherein said state determination module interprets the signals obtained by said monitoring device to estimate a state of the seal, said feasible region analysis module determines a state of the seal that can be achieved by the action of said adjustment device based on a current state, said evaluation module evaluates a value of the state of the seal, said optimization module searches for an adjustment method with a most secure and/or economic benefit level as much as possible from the feasible region of the seal adjustment, and generates the instructions to said adjustment device accordingly.

2. The intelligent regulation system for mechanical seal accordingly to claim 1 , characterized in that: said monitoring device mainly comprises a sensor, a signal preprocessing device, an acquisition card, an acquisition software and necessary terminal equipment as a carrier.

3. The intelligent regulation system for mechanical seal accordingly to claim 1 , characterized in that: the seal-related signals include upstream and downstream pressure, pressure inside the membrane, rotational speed, seal ring temperature, seal ring displacement, capacitance between seal rings, and friction pair acoustic emission, wherein the action of the adjustment device applied on the seal is one or more of force, pressure change, shape change, and heating/cooling.

4. The intelligent regulation system for mechanical seal accordingly to claim 1 , characterized in that: said state determination module filters the signals measured by said monitoring device and obtains a value of the measured physical quantity according to a calibration relationship; said evaluation module first calculates a performance of a given sealing state, and then integrates performance parameters according to requirements of the actual application scenario, thereby mapping each sealing state to a value.

5. An intelligent regulation method for mechanical seal, comprising the steps of: measuring seal-related signals in real-time, executing control algorithm, generating instructions to act on the seal, and processing adjustment to the seal, wherein said control algorithm sequentially comprises a state determination element, a feasible region analysis element, an evaluation element and an optimization searching element, said state determination link interprets the signals obtained by a monitoring device to estimate a state of the seal, said feasible region analysis element determines the state of the seal that can be achieved by an adjustment action of an adjustment device based on a current state, said evaluation element evaluates a value of the state of the seal, said optimization searching element searches for a relatively higher-value of the adjustment as much as possible from the feasible range of the adjustment of the seal and generates instructions accordingly.

6. The intelligent regulation method for mechanical seal according to claim 5 , characterized in that: the seal-related signals comprises upstream and downstream pressure, membrane pressure, rotation speed, seal ring temperature, seal ring displacement, capacitance between seal rings, and friction pair acoustic emission, wherein the act on the seal comprises one or a combination of force, pressure change, shape change, and/or heating/cooling.

7. The intelligent regulation method for mechanical seal according to claim 5 , characterized in that: the state determination element filters the measured signals and obtains a value of the measured physical quantity according to a calibration relationship; when the sensor measurement does not provide all the information of the determined sealing state, the state determination algorithm gives the probability distribution of the sealing state and makes further judgments based on the adjusted signal change.

8. The intelligent regulation method for mechanical seal according to claim 5 , characterized in that: said evaluation module first calculates a performance of a given sealing state, and then integrates performance parameters according to requirements of the actual application scenario, thereby mapping each sealing state to a value.

9. The intelligent regulation method for mechanical seal according to claim 5 , characterized in that: the state determination, feasible region analysis and evaluation are all based on the design method of accurate or approximate calculation of characteristic model of the seal, the characteristic model of the seal refers to what kind of performance will be brought about by the seal in a specific state, what monitorable elements will be produced, and how the state will change in the future.

Assignees

• Univ Tsinghua

Inventors

• Huang Weifeng
• Liu Xiangfeng
• Yin Yuan
• Liu Ying
• Li Decai
• Li Yongjian
• Suo Shuangfu
• Wang Zixi
• Jia Xiaohong
• Guo Fei

Classifications

• F16J15/3492 Primary

  with monitoring or measuring means associated with the seal · CPC title

• G05B19/04

  Program control other than numerical control, i.e. in sequence controllers or logic controllers (G05B19/418 takes precedence) · CPC title

• G01M13/005

  Sealing rings · CPC title

• F16J15/00 Primary

  Sealings · CPC title