WO2018014286A1 - 旋转式压缩机异常状态自愈调控系统及方法 - Google Patents

旋转式压缩机异常状态自愈调控系统及方法 Download PDF

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Publication number
WO2018014286A1
WO2018014286A1 PCT/CN2016/090842 CN2016090842W WO2018014286A1 WO 2018014286 A1 WO2018014286 A1 WO 2018014286A1 CN 2016090842 W CN2016090842 W CN 2016090842W WO 2018014286 A1 WO2018014286 A1 WO 2018014286A1
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Prior art keywords
film thickness
regulating
rotary compressor
compensation ring
abnormal state
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PCT/CN2016/090842
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English (en)
French (fr)
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李双喜
王磊
朱乔峰
李庆
李欢
高金吉
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北京化工大学
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Priority to PCT/CN2016/090842 priority Critical patent/WO2018014286A1/zh
Publication of WO2018014286A1 publication Critical patent/WO2018014286A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings

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  • the invention relates to a control system and a control method for a compressor, in particular to a self-healing control system and a control method for a shaft displacement and a balance plate dynamic static pressure sealing abnormal state of a compressor.
  • the existing centrifugal compressor mostly adopts the balance disc seal, but the centrifugal compressor sealed by the balance disc still generates leakage during the working process, and the applicant's invention patent application "regulated centrifugal compressor balance disc seal online self-healing
  • the method and the self-healing system disclose a method and a device for preventing leakage of a balance disc seal of a centrifugal compressor.
  • the above method and device improve the balance plate sealing effect of the centrifugal compressor to a certain extent, and have a certain axial displacement adjustment function.
  • the primary object of the present invention is to provide a self-healing control system for an abnormal state of a rotary compressor, which can not only make up for the shaft turbulence of the compressor, but also ensure the normal working film thickness of the seal and make the seal more reliable.
  • Another object of the present invention is to provide a self-healing control method for an abnormal state of a rotary compressor, which makes the sealing more reliable.
  • the technical solution of the present invention is: a rotary compressor abnormal state self-healing control system, wherein the rotary compressor is provided with a balance disc back pressure chamber, a compensation ring and a non-compensation ring, and the regulation
  • the system includes a gas path portion including a gas main pipe and a filter, and the gas main pipe is connected with the first, second, and third branch pipes, the first, the second, and the The first regulating valve, the second regulating valve and the third regulating valve are respectively disposed on the three branch lines, and the first, second and third branch pipes are respectively connected to the compensation ring of the compressor to regulate the air chamber and the compensation ring spring chamber
  • the balance disc back pressure chamber, the regulating portion includes a first displacement sensor, a second displacement sensor, a data acquisition device, and a conditioning output device, wherein the first and second displacement sensors are both mounted in the back pressure chamber of the balance disc The first and second displacement sensors respectively acquire an axial displacement signal S in1 of the compensation ring and an axial
  • the rotary compressor abnormal state self-healing control system of the present invention wherein the first branch line is provided with a booster pump.
  • the rotary compressor abnormal state self-healing control system of the present invention wherein the first and second displacement sensors are Eddy current displacement sensor.
  • each of the regulating valves is a proportional regulating valve.
  • a self-healing control method for an abnormal state of a rotary compressor is characterized in that: (1) real-time acquisition of an axial displacement signal S in1 of the compensation ring of the rotary compressor and non-compensation by the first displacement sensor and the second displacement sensor respectively The axial displacement signal S in2 of the ring, and the signal is input to the data acquisition device, the data intelligent control device converts the axial displacement signal into a voltage signal, and (2) passes the compressed air gas source through the first and second
  • the third branch pipeline is respectively connected to the compensation ring regulating air chamber of the rotary compressor, the compensation ring spring chamber and the balance disc back pressure chamber, and the first, second and third regulating valves are respectively arranged on the three branch lines
  • the data intelligent control device changes the opening degree of the three regulating valves by the voltage signal, thereby adjusting the gas flow rate in the three branch pipes, and respectively introducing the gas in the three branch pipes
  • the compensation ring regulates the air chamber, the compensation ring spring chamber and the balance disc back pressure chamber, and adjust
  • the method for adjusting the abnormal state self-healing of the rotary compressor of the present invention wherein the adjustment process of the oil film thickness variation s of the thrust bearing is as follows, changing the opening degree of the third regulating valve, and adjusting the equilibrium air pressure entering the back pressure chamber of the balance disc P i , through the principle of force balance, compare the real-time working film thickness s with the allowable working film thickness interval [S 1 , S 2 ], and obtain the deviation of the real-time working film thickness s from the allowable working film thickness interval [S 1 , S 2 ]
  • the method for adjusting the abnormal state self-healing of the rotary compressor of the present invention wherein the adjustment process of the sealing working film thickness H is as follows: changing the opening degree of the first and second regulating valves, adjusting the regulating pressure of the control ring to enter the compensation ring P s and the regulating air pressure P so of the compensation ring spring chamber, through the principle of force balance, compare the sealing working gas thickness H with the allowable working film thickness interval [H 1 , H 2 ], and obtain the real-time working film thickness H deviation allowable working film
  • the control gas pressure adjustment should be performed when the film thickness deviation value ⁇ H is performed.
  • ⁇ H ⁇ 0 the opening degree of the first and second regulating valves is decreased, and when ⁇ H>0, the opening degree of the first regulating valve is increased, so that the opening degree of the first regulating valve is increased.
  • ⁇ H is within the allowable working film thickness interval [H 1 , H 2 ].
  • each of the regulating valves is a proportional regulating valve.
  • the rotary compressor abnormal state self-healing control method of the present invention wherein the compressed air gas source is taken out from the rotary compressor.
  • the three branch pipes of the abnormal state self-healing control system of the rotary compressor of the present invention are respectively connected to the compensation ring of the compressor, the control ring spring cavity and the balance disk back.
  • the pressure chamber can adjust the sealing film and the shaft displacement at the same time, on the one hand, it can make up the shaft momentum, on the other hand, it can ensure the positive seal.
  • the film thickness is often worked to make the seal more reliable.
  • FIG. 1 is a partial cross-sectional view showing a centrifugal compressor abnormal state self-healing control system in a rotary compressor of the present invention
  • FIG. 2 is a schematic view showing a gas path portion of a self-healing control system for an abnormal state of a rotary compressor according to the present invention
  • Fig. 3 is a flow chart showing the method for controlling the abnormal state self-healing of the rotary compressor of the present invention.
  • a centrifugal compressor abnormal state self-healing control system in a rotary compressor is provided with a balance disc back pressure chamber 31, a compensation ring 32 and a non-compensation ring 33, and the control system includes gas.
  • the road portion and the regulating portion as shown in FIG. 2, the gas path portion includes a gas main pipe 11 and a filter 12, and the gas main pipe 11 is taken out from the intermediate stage or the final stage of the compressor, and the gas main pipe 11 is connected with the first branch pipe.
  • the first regulating valve 13, the second regulating valve 14 and the third regulating valve 15 are respectively disposed on the first, second and third branch lines of the road 16, the second branch line 17, and the third branch line 18.
  • the valves are all proportional adjustment valves
  • the first branch line 16 is further provided with a booster pump 19, and the first, second and third branch lines are respectively connected to the compensation ring of the compressor to regulate the air chamber 34 and the compensation ring spring chamber.
  • the regulating portion comprises a first displacement sensor 21, a second displacement sensor 22, a data acquisition device, a conditioning output device, the first and second displacement sensors are all eddy current displacement sensors, and first,
  • the second displacement sensor is installed Balance disc 31 within the back pressure chamber, the first and second axial displacement sensors are respectively acquired displacement signal S in2 input data and said signal acquisition means axial displacement signals S in1 and uncompensated loop compensation ring, conditioning means according to the output
  • the displacement signal from the data acquisition device changes the opening of the three regulating valves 13, 14, 15.
  • a method for self-healing control of an abnormal state of a rotary compressor includes the following steps: (1) real-time acquisition of compensation of a rotary compressor by a first displacement sensor 21 and a second displacement sensor 22, respectively
  • the axial displacement signal S in1 of the ring and the axial displacement signal S in2 of the non-compensation ring input the signal into the data acquisition device, and the data intelligent control device converts the two axial displacement signals S in1 and S in2 into a voltage signal, b) connecting the compressed air source to the compensating ring regulating air chamber 34, the compensating ring spring chamber 35 and the balance disc back through the first branch line 16, the second branch line 17, and the third branch line 18, respectively
  • the pressure chamber 31, the compressed air source may be taken from an external air source or from an intermediate stage or a final stage of the compressor, and the three branch lines are respectively provided with a first regulating valve 13, a second regulating valve 14, and a third regulating valve 15, control valve are each proportional control valve, intelligent control device to change the data of the
  • the adjustment process of the oil film thickness variation s of the thrust bearing is as follows: the data intelligent control device changes the opening degree of the third regulating valve 15, adjusts the equilibrium air pressure P i entering the back pressure chamber 31 of the balance disc, and compares the real-time working film through the principle of force balance.
  • the opening degree of the first and second regulating valves is decreased, when ⁇ s>0, the opening degree of the third regulating valve is increased so that ⁇ s is within the interval [S 1 , S 2 ] of the allowable change in the working film thickness.
  • the adjustment process of the sealing working film thickness H is as follows: the data intelligent regulating device changes the opening degree of the first and second regulating valves 13, 14 and adjusts the regulating air pressure P s of the compensation ring regulating air chamber 34 and the compensation ring spring chamber 35 Adjusting the air pressure P so , by comparing the principle of force balance, comparing the sealing working mode thickness H with the allowable working film thickness interval [H 1 , H 2 ], and obtaining the real-time working film thickness H deviation from the allowable working film thickness interval [H 1 , H 2
  • Adjusting the balance film sealing working film thickness H and the thrust bearing oil film thickness variation (ie, the axial displacement variation) s that is, achieving the axial force balance of the centrifugal compressor, and adjusting the regulating air pressure of the air chamber 36 by adjusting into the compensation ring s and the balance air pressure P i in the back pressure chamber 31 of the balance disc, or adjust the regulation air pressure P s into the compensation ring control air chamber 34 and the control air pressure P so in the compensation ring spring chamber 35, and adjust the control gas into the compensation ring
  • the regulated air pressure P s of the chamber 34, the regulated air pressure P so of the compensation ring spring chamber 35 and the equilibrium air pressure P i of the balance disc back pressure chamber 31 cooperate.
  • the abnormal state self-healing control system and method of the rotary compressor of the invention can not only make up for the shaft turbulence of the compressor, but also ensure the normal working film thickness of the compressor seal, so that the sealing of the compressor during the high-speed rotation is more reliable. It has industrial applicability.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Abstract

一种旋转式压缩机异常状态自愈调控系统及方法，调控系统包括气路部分和调控部分，气路部分包括气体总管路（11）、过滤器（12），气体总管路（11）连接有三个分支管路（16，17，18），三个分支管路（16，17，18）上分别设置一调节阀（13，14，15），三个分支管路（16，17，18）分别连接到压缩机的补偿环调控气腔（34）、补偿环弹簧腔（35）及平衡盘背压腔（31）；调控部分包括第一、第二位移传感器（21，22）、数据采集装置、调理输出装置；两个位移传感器分别采集补偿环（32）的轴向位移信号Sin1和非补偿环（33）的轴向位移信号Sin2并将上述两信号输入数据采集装置，调理输出装置根据位移信号改变三个调节阀（13，14，15）开度。这种调控系统不仅可以弥补压缩机的轴窜动量，还可以保证密封正常工作膜厚，使密封更加可靠。

Description

旋转式压缩机异常状态自愈调控系统及方法 技术领域
本发明涉及一种压缩机的控制系统及控制方法，具体说涉及一种压缩机的轴位移与平衡盘动静压密封异常状态自愈调控系统及调控方法。
背景技术
现有的离心压缩机多采用平衡盘密封，但是采用平衡盘密封的离心压缩机在工作过程中仍会产生泄漏，本申请人的发明专利申请“可调控型离心压缩机平衡盘密封在线自愈方法及自愈系统”公开了一种防止离心压缩机平衡盘密封泄漏的方法及装置，上述方法及装置在一定程度上提高了离心压缩机的平衡盘密封效果，并有一定的轴位移调节作用，但是离心压缩机在实际工作过程中，轴位移的变化对平衡盘的密封调节影响很大，甚至轴位移的变化可能带来密封件发生碰磨等情况，进而使密封失效，上述发明专利申请没有解决轴位移对密封的影响这一问题。
发明内容
本发明的首要目的是提供一种旋转式压缩机异常状态自愈调控系统，其不仅可以弥补压缩机的轴窜动量，还可以保证密封的正常工作膜厚，使密封更加可靠。
本发明的另一目的是提供一种旋转式压缩机异常状态自愈调控方法，该方法使密封更加可靠。
为了实现上述目的，本发明的技术解决方案为：一种旋转式压缩机异常状态自愈调控系统，所述旋转式压缩机上设置有平衡盘背压腔、补偿环及非补偿环，所述调控系统包括气路部分和调控部分，所述气路部分包括气体总管路、过滤器，所述气体总管路连接有第一、第二、第三三个分支管路，第一、第二、第三分支管路上分别设置第一调节阀、第二调节阀及第三调节阀，所述第一、第二、第三分支管路分别连接到压缩机的补偿环调控气腔、补偿环弹簧腔及平衡盘背压腔，所述调控部分包括第一位移传感器、第二位移传感器、数据采集装置、调理输出装置，所述第一、第二位移传感器均安装于所述平衡盘背压腔内，所述第一、第二位移传感器分别采集补偿环的轴向位移信号Sin1和非补偿环的轴向位移信号Sin2并将上述信号输入所述数据采集装置，所述调理输出装置根据来自所述数据采集装置的位移信号改变三个所述调节阀开度。
本发明旋转式压缩机异常状态自愈调控系统，其中，所述第一分支管路上设置有增压泵。
本发明旋转式压缩机异常状态自愈调控系统，其中，所述第一、第二位移传感器均为 电涡流位移传感器。
本发明旋转式压缩机异常状态自愈调控系统，其中，所述各调节阀均为比例调节阀。
一种旋转式压缩机异常状态自愈调控方法，其特征在于：(一)通过第一位移传感器、第二位移传感器分别实时采集旋转式压缩机的补偿环的轴向位移信号Sin1及非补偿环的轴向位移信号Sin2，并将所述信号输入数据采集装置，数据智能调控设备将所述轴向位移信号转变为电压信号，(二)将压缩空气气源通过第一、第二、第三分支管路分别连接到旋转式压缩机的补偿环调控气腔、补偿环弹簧腔及平衡盘背压腔，所述三个分支管路上分别设置有第一、第二、第三调节阀，所述数据智能调控设备通过所述电压信号改变所述三个调节阀的开度，从而调整所述三个分支管路内的气体流量，将所述三个分支管路内气体分别通入补偿环调控气腔、补偿环弹簧腔及平衡盘背压腔，调节靶向调控型工作气膜厚度H、弹簧补偿力F及止推轴承油膜厚度变化量s，使靶向调控型工作气膜厚度H产生的开启力FH、弹簧补偿力F以及轴位移变化量s产生的轴向力Fs合力在允许范围内。
本发明旋转式压缩机异常状态自愈调控方法，其中，所述的止推轴承油膜厚度变化量s的调整过程如下，改变第三调节阀的开度，调节进入平衡盘背压腔的平衡气压Pi，通过力平衡原理，比较实时工作膜厚s与允许工作膜厚区间[S1，S2]，得出实时工作膜厚s偏离允许工作膜厚区间[S1，S2]的偏差值△s，当s<S1时，△s＝s-S1，s>s2时，△s＝s–S2，得到外加调控气修正靶向调控型密封膜厚偏差值△s时所应进行的调控气压力调整，△s<0时，减小第一、第二调节阀的开度，△s>0时，增加第三调节阀的开度，使△s满足属于允许工作膜厚变化量的区间[S1，S2]。
本发明旋转式压缩机异常状态自愈调控方法，其中，所述密封工作气膜厚度H的调整过程如下：改变第一、第二调节阀的开度，调节进入补偿环调控气腔的调控气压Ps和补偿环弹簧腔的调控气压Pso，通过力平衡原理，比较密封工作气模厚度H与允许工作膜厚区间[H1，H2]，得出实时工作膜厚H偏离允许工作膜厚区间[H1，H2]的偏差值△H，当H<H1时，△H＝H-H1，H>H2时，△H＝H-H2，得到外加调控气修正靶向调控型密封膜厚偏差值△H所应进行的调控气压力调整，△H<0时，减小第一、第二调节阀的开度，△H>0时，增加第一调节阀的开度，使△H在允许工作膜厚区间[H1，H2]内。
本发明旋转式压缩机异常状态自愈调控方法，其中，各所述调节阀均为比例调节阀。
本发明旋转式压缩机异常状态自愈调控方法，其中，所述压缩空气气源从所述旋转式压缩机内引出。
采用上述方案后，与现有技术相比由于本发明旋转式压缩机异常状态自愈调控系统的三个分支管路分别连接到压缩机的补偿环调控气腔、补偿环弹簧腔及平衡盘背压腔，因此可同时调控密封气膜和轴位移，一方面可以弥补轴窜动量，另一方面也可以保证密封的正 常工作膜厚，使密封更可靠。
附图说明
图1是本发明旋转式压缩机中的离心压缩机异常状态自愈调控系统的局部剖视图；
图2是本发明旋转式压缩机异常状态自愈调控系统的气路部分示意图；
图3是本发明旋转式压缩机异常状态自愈调控方法的流程方框图。
具体实施方式
如图1所示，本发明一种旋转式压缩机中的离心压缩机异常状态自愈调控系统，压缩机上设置有平衡盘背压腔31、补偿环32及非补偿环33，调控系统包括气路部分和调控部分，如图2所示，气路部分包括气体总管路11、过滤器12，气体总管路11从压缩机的中间级或末级引出，气体总管路11连接有第一分支管路16、第二分支管路17、第三分支管路18，第一、第二、第三分支管路上分别设置第一调节阀13、第二调节阀14及第三调节阀15，各调节阀均为比例调节阀，第一分支管路16上还设置有增压泵19，第一、第二、第三分支管路分别连接到压缩机的补偿环调控气腔34、补偿环弹簧腔35及平衡盘背压腔31，调控部分包括第一位移传感器21、第二位移传感器22、数据采集装置、调理输出装置，第一、第二位移传感器均为电涡流位移传感器，并且第一、第二位移传感器均安装于平衡盘背压腔31内，第一、第二位移传感器分别采集补偿环的轴向位移信号Sin1和非补偿环的轴向位移信号Sin2并将上述信号输入数据采集装置，调理输出装置根据来自所述数据采集装置的位移信号改变三个调节阀13、14、15开度。
如图3所示，本发明一种旋转式压缩机异常状态自愈调控方法，包括下述步骤：(一)通过第一位移传感器21、第二位移传感器22分别实时采集旋转式压缩机的补偿环的轴向位移信号Sin1及非补偿环的轴向位移信号Sin2，将上述信号输入数据采集装置，数据智能调控设备将上述两轴向位移信号Sin1、Sin2转变为电压信号，(二)将压缩空气气源通过第一分支管路16、第二分支管路17、第三分支管路18分别连接到压缩机的补偿环调控气腔34、补偿环弹簧腔35及平衡盘背压腔31，压缩空气气源可采用外置气源或从压缩机的中间级或末级引出，上述三个分支管路上分别设置有第一调节阀13、第二调节阀14、第三调节阀15，上述各调节阀均为比例调节阀，数据智能调控设备通过上述两轴向位移信号Sin1、Sin2改变上述三个调节阀的开度，从而调整上述三个分支管路内的气体流量，将上述三个分支管路内气体分别通入补偿环调控气腔34、补偿环弹簧腔35及平衡盘背压腔31，调节靶向调控型工作气膜厚度H、弹簧补偿力F及止推轴承油膜厚度变化量即轴位移变化量s，使靶向调控型工作气膜厚度H产生的开启力FH、弹簧补偿力F以及轴位移变化量s产生的轴向力Fs合力在允许范 围内。
止推轴承油膜厚度变化量s的调整过程如下：数据智能调控设备改变第三调节阀15的开度，调节进入平衡盘背压腔31的平衡气压Pi，通过力平衡原理，比较实时工作膜厚s与允许工作膜厚区间[S1，S2]，得出实时工作膜厚s偏离允许工作膜厚区间[S1，S2]的偏差值△s，当s<S1时，△s＝s-S1，s>s2时，△s＝s–S2，得到外加调控气修正靶向调控型密封膜厚偏差值△s时所应进行的调控气压力调整，△s<0时，减小第一、第二调节阀的开度，△s>0时，增加第三调节阀的开度，使△s在允许工作膜厚变化量的区间[S1，S2]内。
密封工作气膜厚度H的调整过程如下：数据智能调控设备改变第一、第二调节阀13、14的开度，调节进入补偿环调控气腔34的调控气压Ps和补偿环弹簧腔35的调控气压Pso，通过力平衡原理，比较密封工作气模厚度H与允许工作膜厚区间[H1，H2]，得出实时工作膜厚H偏离允许工作膜厚区间[H1，H2]的偏差值△H，当H<H1时，△H＝H-H1，H>H2时，△H＝H-H2，得到外加调控气修正靶向调控型密封膜厚偏差值△H所应进行的调控气压力调整，△H<0时，减小第一、第二调节阀的开度，△H>0时，增加第一调节阀的开度，使△H在允许工作膜厚区间[H1，H2]内。
调节平衡盘密封工作气膜厚度H和止推轴承油膜厚度变化量(即轴位移变化量)s，即实现离心压缩机轴向力平衡，可以通过调节进入补偿环调控气腔36的调控气压Ps和平衡盘背压腔31内的平衡气压Pi，或者调节进入补偿环调控气腔34内的调控气压Ps和补偿环弹簧腔35内的调控气压Pso，以及调节进入补偿环调控气腔34的调控气压Ps、补偿环弹簧腔35的调控气压Pso和平衡盘背压腔31的平衡气压Pi三者共同作用。
工业实用性
本发明旋转式压缩机异常状态自愈调控系统及方法，其不仅可以弥补压缩机的轴窜动量，还可以保证压缩机密封的正常工作膜厚，使压缩机在高速转动过程中密封更加可靠，具有工业实用性。

Claims (9)

  1. 一种旋转式压缩机异常状态自愈调控系统，所述旋转式压缩机上设置有平衡盘背压腔(31)、补偿环(32)及非补偿环(33)，其特征在于：所述调控系统包括气路部分和调控部分，所述气路部分包括气体总管路(11)、过滤器(12)，所述气体总管路(11)连接有第一、第二、第三三个分支管路，第一、第二、第三分支管路上分别设置第一调节阀(13)、第二调节阀(14)及第三调节阀(15)，所述第一、第二、第三分支管路分别连接到压缩机的补偿环调控气腔(34)、补偿环弹簧腔(35)及平衡盘背压腔(31)，所述调控部分包括第一位移传感器(21)、第二位移传感器(22)、数据采集装置及调理输出装置，所述第一、第二位移传感器均安装于所述平衡盘背压腔(31)内，所述第一、第二位移传感器分别采集补偿环的轴向位移信号Sin1和非补偿环的轴向位移信号Sin2并将上述信号输入所述数据采集装置，所述调理输出装置根据来自所述数据采集装置的位移信号改变三个所述调节阀(13、14、15)开度。
  2. 根据权利要求1所述的旋转式压缩机异常状态自愈调控系统，其特征在于：所述第一分支管路(16)上设置有增压泵(19)。
  3. 根据权利要求2所述的旋转式压缩机异常状态自愈调控系统，其特征在于：所述第一、第二位移传感器均为电涡流位移传感器。
  4. 根据权利要求3所述的旋转式压缩机异常状态自愈调控系统，其特征在于：所述各调节阀均为比例调节阀。
  5. 一种旋转式压缩机异常状态自愈调控方法，其特征在于：(一)通过第一位移传感器(21)、第二位移传感器(22)分别实时采集旋转式压缩机的补偿环的轴向位移信号Sin1及非补偿环的轴向位移信号Sin2，并将所述信号输入数据采集装置，数据智能调控设备将所述轴向位移信号转变为电压信号，(二)将压缩空气气源通过第一、第二、第三分支管路分别连接到旋转式压缩机的补偿环调控气腔(34)、补偿环弹簧腔(35)及平衡盘背压腔(31)，所述三个分支管路上分别设置有第一、第二、第三调节阀，所述数据智能调控设备通过所述电压信号改变所述三个调节阀的开度，从而调整所述三个分支管路内的气体流量，将所述三个分支管路内气体分别通入补偿环调控气腔(34)、补偿环弹簧腔(35)及平衡盘背压腔(31)，调节靶向调控型工作气膜厚度H、弹簧补偿力F及止推轴承油膜厚度变化量s，使靶向调控型工作气膜厚度H产生的开启力FH、弹簧补偿力F以及轴位移变化量s产生的轴向力 Fs合力在允许范围内。
  6. 根据权利要求5所述的旋转式压缩机异常状态自愈调控方法，其特征在于：所述的止推轴承油膜厚度变化量s的调整过程如下，改变第三调节阀(18)的开度，调节进入平衡盘背压腔(31)的平衡气压Pi，通过力平衡原理，比较实时工作膜厚s与允许工作膜厚区间[S1，S2]，得出实时工作膜厚s偏离允许工作膜厚区间[S1，S2]的偏差值△s，当s<S1时，△s＝s-S1，s>s2时，△s＝s–S2，得到外加调控气修正靶向调控型密封膜厚偏差值△s时所应进行的调控气压力调整，△s<0时，减小第一、第二调节阀的开度，△s>0时，增加第三调节阀的开度，使△s满足属于允许工作膜厚变化量的区间[S1，S2]。
  7. 根据权利要求6所述的旋转式压缩机异常状态自愈调控方法，其特征在于：所述密封工作气膜厚度H的调整过程如下：改变第一、第二调节阀(13、14)的开度，调节进入补偿环调控气腔(34)的调控气压Ps和补偿环弹簧腔(35)的调控气压Pso，通过力平衡原理，比较密封工作气模厚度H与允许工作膜厚区间[H1，H2]，得出实时工作膜厚H偏离允许工作膜厚区间[H1，H2]的偏差值△H，当H<H1时，△H＝H-H1，H>H2时，△H＝H-H2，得到外加调控气修正靶向调控型密封膜厚偏差值△H所应进行的调控气压力调整，△H<0时，减小第一、第二调节阀的开度，△H>0时，增加第一调节阀的开度，使△H在允许工作膜厚区间[H1，H2]内。
  8. 根据权利要求7所述的旋转式压缩机异常状态自愈调控方法，其特征在于：各所述调节阀均为比例调节阀。
  9. 根据权利要求8所述的旋转式压缩机异常状态自愈调控方法，其特征在于：所述压缩空气气源从所述旋转式压缩机内引出。
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