Adjustable centrifugal compressor balance disc seal online self-healing method and self-healing system
A technology for centrifugal compressors and balance disks, which is applied in pump control, mechanical equipment, machines/engines, etc., can solve the problems of large leakage of balance disk seals, achieve large leakage, promote high speed, and actively regulate the sealing film thick effect
Active Publication Date: 2016-04-27
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
To cooperate with the new adjustable seal to change the current problem of large leakage of the centrifugal compressor balance plate seal
Method used
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[0025] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. However, it should not be construed that the scope of the present invention is limited only to the following examples. Without departing from the above-mentioned technical idea of the present invention, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.
[0026] Such as figure 1 Shown is the flow chart of the online self-healing method implemented by the present invention. The adjustable seal is installed on the balance plate of the shaft end of the industrial centrifugal compressor. When the working conditions such as the speed of the centrifugal compressor or the inlet pressure change, the corresponding axial displacement of the centrifugal compressor will occur slightly. The eddy current displacement sensor and data acquisition devic...
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Disclosed is an adjustable centrifugal compressor balancing disc sealing online self-healing method and system. The method comprises the following steps that an eddy current displacement sensor and a data collecting device collect the axial displacement signals of an adjustable sealing compensation ring and an adjustable sealing non-compensation ring in real time; an intelligent control device processes the real-time axial displacement signals to obtain the real-time axial displacement deviation of the detected adjustable sealing compensation ring and the detected adjustable sealing non-compensation ring and correlates the deviation with the balancing working film thickness of adjustable sealing to obtain the real-time working film thickness of the adjustable sealing; the real-time working film thickness is compared with an allowed working film thickness interval to obtain the deviation value of the real-time working film thickness deviated from the allowed working film thickness interval; the intelligent control device analyzes and adjusts the real-time working film thickness of the adjustable sealing. The invention also relates to the adjustable centrifugal compressor balancing disc sealing online self-healing method to detect the adjustable sealing state in real time and accordingly to improve the working stability of a centrifugal compressor.
Description
technical field [0001] The invention relates to an on-line self-healing method and self-healing system for the balance plate sealing of an adjustable centrifugal compressor, and the self-healing system can adjust the switch of the solenoid valve or the opening of the electric regulating valve to The pressure of the gas in the surge tank is controlled, so as to achieve the purpose of changing the adjustable air pressure of the adjustable seal and eliminating the fluctuation of the thickness of the sealed air film. The scope of application can be extended to balance disc seals of other rotating machinery, such as steam turbines, steam turbines and turbo pumps, etc. Background technique [0002] With the development of petrochemical production equipment in the direction of large-scale, centralization, automation, energy saving and environmental protection, people pay more and more attention to the continuous production capacity and safety and stability of petrochemical equipmen...
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IPC IPC(8): F04D27/00F04D29/08F04D29/66
Inventor 李双喜张秋翔蔡纪宁金朝旭
Owner BEIJING UNIV OF CHEM TECH