JPH02123299A - Controller for centrifugal compressor - Google Patents
Controller for centrifugal compressorInfo
- Publication number
- JPH02123299A JPH02123299A JP27331188A JP27331188A JPH02123299A JP H02123299 A JPH02123299 A JP H02123299A JP 27331188 A JP27331188 A JP 27331188A JP 27331188 A JP27331188 A JP 27331188A JP H02123299 A JPH02123299 A JP H02123299A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- centrifugal compressor
- guide vane
- pressure
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 101000836337 Homo sapiens Probable helicase senataxin Proteins 0.000 description 1
- 102100027178 Probable helicase senataxin Human genes 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は遠心圧縮機に係り、特に遠心圧縮機を電流制
御で効率よく且つ好適に運転させる遠心圧縮機の制御装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a centrifugal compressor, and particularly to a centrifugal compressor control device that operates the centrifugal compressor efficiently and suitably through current control.
［従来の技術］
一定圧力のサービス空気を効率よく生成し、生成したサ
ービス空気をユーザー（プラント）に安定供給する空気
圧ａｍとして遠心圧縮機がある。[Prior Art] There is a centrifugal compressor as an air pressure am that efficiently generates service air at a constant pressure and stably supplies the generated service air to users (plants).
一般的な遠心圧縮機を第４図のフローシートに示す。A typical centrifugal compressor is shown in the flow sheet of FIG.
図示するように、遠心式圧縮機１の吸込側に、遠心式圧
縮機１の羽根車に対する吸込み空気の流量を変えて遠心
式圧縮機１の圧力曲線を変えるガイドベーン２を設け、
遠心式圧縮機１の吐出下流に圧縮空気の一部を外部に放
出してサージングを防止する放風制御弁５を設け、上記
遠心式圧縮機１を駆動する駆動モータ（図示せず）の使
用負荷を検出するオーバーロード調節計７の指示および
吐出空気圧を検出する圧力指示調節計８の指示を分析し
、一方の指示を優先する選択器９の指示に従ってガイド
ベーン２の開度を自動的に調節するように構成する一方
、遠心式圧縮機１の下流の差圧を計測する差圧発信器１
０の計測値に基づき上記放風制御弁５の開閉または開度
を自動的に調節する流量指示調節計１１を設けて梢成し
たものが知られている。As shown in the figure, a guide vane 2 is provided on the suction side of the centrifugal compressor 1 to change the pressure curve of the centrifugal compressor 1 by changing the flow rate of suction air to the impeller of the centrifugal compressor 1,
A discharge control valve 5 is provided downstream of the discharge of the centrifugal compressor 1 to prevent surging by discharging a part of the compressed air to the outside, and a drive motor (not shown) is used to drive the centrifugal compressor 1. Analyzes the instructions from the overload controller 7 that detects the load and the pressure indicator controller 8 that detects the discharge air pressure, and automatically adjusts the opening of the guide vane 2 according to the instructions from the selector 9 that gives priority to one of the instructions. a differential pressure transmitter 1 configured to regulate while measuring a differential pressure downstream of the centrifugal compressor 1;
A system is known in which a flow rate indicating controller 11 is provided to automatically adjust the opening/closing or opening degree of the air discharge control valve 5 based on the measured value of zero.
［発明が解決しようとする課題］
しかしながら差圧発信器の実測値に基づき上記放風制御
弁の開閉または開度を調節するように構成すると、各弁
の開閉に起因して突発的な圧力の変動が発生した時の制
御に応答遅れが生じることがあり、制御の信頼性をより
向上させる上で解決すべき課題として指摘されていた。[Problems to be Solved by the Invention] However, if the opening/closing or opening degree of the air discharge control valve is adjusted based on the actual measurement value of the differential pressure transmitter, a sudden pressure increase may occur due to the opening/closing of each valve. Response delays may occur in control when fluctuations occur, and this has been pointed out as an issue that needs to be resolved in order to further improve control reliability.
［課題を解決するための手段］
この発明は上記課題を解決することを目的とし、遠心圧
縮機の吸込上流に設けられ吸込流量を変えるガイドベー
ンと、吐出下流に設けられ圧縮空気の一部を放出する放
風制御弁と、上記圧縮機の吐出下流の吐出圧を電圧信号
に変換して出力する圧力変換器と、上記圧縮機の吐出流
量計測用として流Ｉに比例する電動機電流（交流）を直
流電圧信号に変換する電流変換機と、これら変換値に応
じて上記ガイドベーン及び放風制御弁を開閉作動するコ
ントローラとを有して遠心圧Ｓ機の制御装置を構成した
ものである。[Means for Solving the Problems] The present invention aims to solve the above problems, and includes a guide vane provided upstream of the suction of a centrifugal compressor to change the suction flow rate, and a guide vane provided downstream of the discharge to change a part of the compressed air. a pressure converter that converts the discharge pressure downstream of the compressor into a voltage signal and outputs the voltage signal; and a motor current (alternating current) proportional to the flow I for measuring the discharge flow rate of the compressor. A control device for a centrifugal pressure S machine includes a current converter that converts the current into a DC voltage signal, and a controller that opens and closes the guide vanes and the air discharge control valve according to these converted values.
［作用］
電流変換器から遠心圧縮機の吐出流量及び圧力変換器か
ら吐出下流の吐出圧を示す変換値がコントローラに入力
されると、コントローラはそれら変換値に応じてガイド
ベーン及び放風制御弁を開閉作動する。即ち入力された
変換値から想定される遠心圧縮機の運転状態に応じてガ
イドベーン及び放風制御弁を開閉作動することで遠心圧
縮機が一定の吐出圧力を保持し、且つ遠心圧縮機がサー
ジング領域で運転されることを阻止する一方、ガイドベ
ーン及び放風制御弁の開閉作動を制御して吐出圧の急激
な増加を未然に防止する。[Operation] When converted values indicating the discharge flow rate of the centrifugal compressor from the current converter and the discharge pressure downstream of the discharge from the pressure converter are input to the controller, the controller adjusts the guide vane and air discharge control valve according to these converted values. Opens and closes. In other words, by opening and closing the guide vane and the air discharge control valve according to the operating state of the centrifugal compressor assumed from the input conversion value, the centrifugal compressor maintains a constant discharge pressure, and the centrifugal compressor does not surge. At the same time, the opening and closing operations of the guide vane and the air discharge control valve are controlled to prevent a sudden increase in discharge pressure.
［実施例］
以下にこの発明の好適一実施例を添付図面に基づいて説
明する。[Embodiment] A preferred embodiment of the present invention will be described below based on the accompanying drawings.
この実施例にあって、遠心式圧縮機は第１図のフローシ
ートに示しであるように、遠心圧縮機１の吸込み側には
、アクチュエータ（図示せず）で駆動されて遠心圧縮機
１の羽根車に対する吸込み空気の流入角度を変えて遠心
圧縮Ｒ１の吸込空気流量を変え、遠心圧縮ａｉの圧力曲
線を変えるガイドベーン２が設けられ、遠心圧縮機１の
吐出部に接続した圧力流体搬送路３の下流には、圧縮空
気の一部を遠心圧縮機１の吸込み側４に戻すが或いは大
気開放させてサージングを防止する放風制御弁５が設け
られている。実施例にあってこの遠心圧縮Ｒ１は空気を
吸い込みつつ圧縮して吐出する圧縮部を吐出方向に直列
に３段連結して構成されており、各圧縮部はそれぞれイ
ンペラと、それらインペラをそれぞれ回転自在に収容す
る圧縮部ケーシング（いずれも図示せず）から成る。但
しインペラの駆動軸（図示せず）はそれぞれギヤトレー
ンまたは駆動ベルト等の駆動力伝達機構（図示せず）で
連結され、これら駆動軸が１つの駆動モータ６で連動す
るように梢成しである。また上記圧縮ｆｉ１より下流に
設けた逆止弁２５の上流を放風制御弁５で大気解放でき
るように構成し、１段側のインペラの前にガイドベーン
２を設けて遠心圧縮ｆｉ１の流量を調節できるように構
成することで遠心圧縮Ｉａ１の負荷・無負荷切換運転を
可能にしている。実施例ではガイドベーンを開閉作動す
るアクチュエータは可逆電動機とボールネジにより全開
から全開に至らせるストロークを一定時間（Ｔ２ｓｅｃ
）で行うようにしである。In this embodiment, as shown in the flow sheet of FIG. 1, the centrifugal compressor is equipped with an actuator (not shown) on the suction side of the centrifugal compressor 1. A pressure fluid conveying path connected to the discharge part of the centrifugal compressor 1 is provided with a guide vane 2 that changes the inflow angle of the suction air to the impeller to change the suction air flow rate of the centrifugal compression R1 and changes the pressure curve of the centrifugal compression ai. 3 is provided with an air discharge control valve 5 that returns a portion of the compressed air to the suction side 4 of the centrifugal compressor 1 or releases it to the atmosphere to prevent surging. In this embodiment, this centrifugal compression R1 is constructed by connecting three compression sections in series in the discharge direction, each of which sucks in air, compresses it, and then discharges it.Each compression section has an impeller, and each impeller rotates. It consists of a freely accommodating compressor casing (none of which is shown). However, the drive shafts (not shown) of the impellers are connected to each other by a drive power transmission mechanism (not shown) such as a gear train or a drive belt, and these drive shafts are connected to each other by a single drive motor 6. . In addition, the upstream side of the check valve 25 provided downstream of the compression fi1 is configured so that it can be released to the atmosphere by the air discharge control valve 5, and a guide vane 2 is provided in front of the impeller on the first stage side to control the flow rate of the centrifugal compression fi1. The adjustable configuration enables load/no-load switching operation of the centrifugal compression Ia1. In the example, the actuator that opens and closes the guide vane uses a reversible electric motor and a ball screw to make a stroke from fully open to fully open for a certain period of time (T2sec).
).
さてこの実施例にあっては、これらガイドベン２および
放風制御弁５を１つのコントローラ１５で開閉を制御す
るように構成している。In this embodiment, the opening and closing of the guide vent 2 and the air blowing control valve 5 are controlled by one controller 15.
実施例にあってコントローラ１５は、第１図に示しであ
るように中央演算処理装置（以下ｒｃｐｕ。In the embodiment, the controller 15 is a central processing unit (hereinafter referred to as rcpu) as shown in FIG.
という）１６と、上記遠心式圧ａｎ １のアナログ運転
データをデジタル運転データに変換してＣＰＵ１６に入
力するアナログ信号／デジタル信号変換器（以下ｒＡ／
Ｄ変換器」という）１７と、ＣＰＵ１６との間でデータ
を入出力するプロセス入出力装置（以下ｒＰ１０．とい
う）１８、ＣＰＵ１６が読み込む遠心圧縮ｆｉ１の運転
を記憶させたマツプ２０とから構成されている。) 16 and an analog signal/digital signal converter (hereinafter referred to as rA/
17, a process input/output device (hereinafter referred to as rP10) 18 that inputs and outputs data to and from the CPU 16, and a map 20 that stores the operation of the centrifugal compression fi1 read by the CPU 16. There is.
Ａ／Ｄ変換器１７には、電流変換器１９を介して入力さ
れる上記駆動モータ６の電流値、および圧力変換機２３
を介して入力される遠心圧ａｆｉ １の吐出圧か入力さ
れる。２８はレシーバ−タンクである。The A/D converter 17 receives the current value of the drive motor 6 inputted via the current converter 19 and the pressure converter 23.
The discharge pressure of the centrifugal pressure afi1 is inputted via the centrifugal pressure afi1. 28 is a receiver tank.
なおＰＩＯ１８は、接続されたブツシュ・ボタン切換式
の自動／無負荷スイッチ（ＰＢ）の切換えで遠心式圧縮
機１の自動運転（負荷運転）と無負荷運転とのいずれか
一方を選択できるようにしである。In addition, the PIO 18 is configured so that either automatic operation (load operation) or no-load operation of the centrifugal compressor 1 can be selected by switching the connected bush/button type automatic/no-load switch (PB). It is.
さて第１図および第３図を参照しつつＣＰＵ１６の制御
内容を説明する。Now, the control contents of the CPU 16 will be explained with reference to FIGS. 1 and 3.
ＣＰＵ１６は第３図のフローチャートに示しであるよう
な制御を実行するように構成しである。The CPU 16 is configured to execute control as shown in the flowchart of FIG.
基本的にＣＰＵ１６は吐出圧力が設定圧力Ｐ。工Ｘ固定
常数ｆ１より高くなると遠心圧縮機１を熟ｆ′を荷（ア
ンロード）にしてサージングを防止する工１荷／無負荷
制御（非サージ制御）、及び第２図に示しである電流（
吐出１１）−吐出圧力性能を示すマツプ２０に基づいて
、サージング領域■（斜線部）の圧力で遠心圧縮機１を
アンロードする非サージ制御を実行するように構成しで
ある。Basically, the discharge pressure of the CPU 16 is the set pressure P. When the current is higher than the fixed constant f1, the centrifugal compressor 1 is loaded (unloaded) at f' to prevent surging, and the current is controlled as shown in Figure 2. (
Discharge 11) - Based on the map 20 showing the discharge pressure performance, the configuration is such that non-surge control is executed to unload the centrifugal compressor 1 at the pressure in the surging region (shaded area).
ＣＰＵ１Ｇは、判断５０で起動盤（図示せず）の０Ｎ−
ＯＦＦを判断し、ＹＥＳのときは判断５１へ進み、起動
後の時間が所定時間に達したかを判断する。即ち判断５
１は起動後の時間が’ｒ”、ｓｅｃに至るまでフローを
一時待機させる。待機を終了するとステップ５２でカウ
ンターＮ Ｎ Ｎに１を入れ１回目の制御を続行する。The CPU 1G makes a judgment of 50 and selects 0N- on the startup board (not shown).
OFF is determined, and if YES, the process proceeds to determination 51, where it is determined whether the time after activation has reached a predetermined time. That is, judgment 5
1 causes the flow to temporarily wait until the time after startup reaches 'r'', sec. When the wait is finished, 1 is entered in the counter N N N in step 52 and the first control is continued.
次に判１！Ｊｉ５３で負荷モードを判定する。Next is judgment 1! The load mode is determined by Ji53.
判断５３の判定か自動負荷運転である場合には、まず判
断５４で圧力変換器２３で計測した吐出圧が設定圧力Ｐ
ＳＥＴＸ固定常数ｆ４未満のとき、判断５５で逆止弁２
５下流の吐出圧がＰｓＥＴＸ電流／ＭＩＮ・Ａ、ＭＰ＋
ＰＭ（サージ脱出圧力マージン）未満のとき、判断５６
で電流値がＭ Ｉ Ｎ−Ａ、 Ｍ Ｐを越えるとき、つ
まりこれ等判断５４，５５．５６の全てがＹＥＳの場合
ＣＰＵ１６は工１荷運転を継続する。ＣＰＵ１６は次い
でステップ５７．５８の負荷時間、ｆｔ荷四回数計測を
経て判断５９及び判断６０のそれぞれで検出電流がＭＡ
Ｘ−ＡＭＰ以下か、ＭＩＮ−ＡＭＰＸ固定常固定常数上
２以上定する。但し固定常数ｆ１ｆ２は例えば１．１
とする。判断６０がＮＯのときはステップ６１でガイド
ベーン２を閉作動し、ＹＥＳのときはそれぞれ判断６２
１判ＩＪＪｒ６４に進む９判断６２で吐出圧が、設定圧
力Ｐ ｓ！を一不感帯Ａ以下のときステップ６５でガイ
ドベーン２を開作動し、判断６４で吐出圧が設定圧力Ｐ
０アを越えるときステップ６６でガイドベーン２を閉作
動する。判断５９で検出電流値かＭＩＮ−ＡＭＰｘ固定
定ｆｉｆ２以上のときＣＰｔＪ１６はステップ６３とス
テップ６８で放風制御弁５を閉作動する。尚、固定常数
ｆ＋、ｆ２．不感帯Ａは可変な固定常数である。In the case of judgment 53 or automatic load operation, first in judgment 54 the discharge pressure measured by the pressure transducer 23 is the set pressure P.
When SETX fixed constant f4 is less than check valve 2 in judgment 55.
5 The downstream discharge pressure is PsETX current/MIN・A, MP+
When it is less than PM (surge escape pressure margin), judgment 56
When the current value exceeds MIN-A and MP, that is, when all of these judgments 54, 55, and 56 are YES, the CPU 16 continues the single load operation. The CPU 16 then measures the load time and ft load four times in steps 57 and 58, and then determines whether the detected current is MA in each of judgments 59 and 60.
It is set to be less than or equal to X-AMP or 2 or more above MIN-AMPX fixed constant constant. However, the fixed constant f1f2 is, for example, 1.1
shall be. When the judgment 60 is NO, the guide vane 2 is closed in step 61, and when it is YES, the judgment 62 is performed.
At 9 judgment 62 which proceeds to 1st size IJJr 64, the discharge pressure is the set pressure P s! When the pressure is less than one dead zone A, the guide vane 2 is opened in step 65, and the discharge pressure reaches the set pressure P in judgment 64.
When it exceeds 0a, the guide vane 2 is operated to close in step 66. When the detected current value is greater than MIN-AMPx fixed constant fif2 in judgment 59, the CPtJ16 closes the air discharge control valve 5 in steps 63 and 68. Note that fixed constants f+, f2. Dead zone A is a variable fixed constant.
一方、遠心式圧縮機１の動力が１００％定格を越えても
駆動モータ６の定格電流を越えない場合は問題がないか
らＭ Ａ Ｘ−Ａ Ｍ Ｐが決定するモータ定格電流以
下で圧力が設定圧力ＰＳＥエー不感帯Ａ未満の場合にガ
イドベーン２を開けて、風量を増加させるように制御（
ステップ６５）シ、モータ定格電流を越えると、越えた
分たけカイトベーン２の開度を絞って風量を減少させる
（ステップ６１）。On the other hand, even if the power of the centrifugal compressor 1 exceeds 100% rated, if it does not exceed the rated current of the drive motor 6, there is no problem, so the pressure is set below the motor rated current determined by MAX-AMP. When the pressure PSE A is less than the dead zone A, the guide vane 2 is opened and the air volume is increased (
Step 65) When the motor rated current is exceeded, the opening degree of the kite vane 2 is reduced by the excess amount to reduce the air volume (Step 61).
つまりＣＰＵ１Ｇはモータ定格電流を越えである程度運
転を継続された際に、モータ保護のモータ過負荷リレー
（図示せず）等で遠心圧縮機１が１ヘリツブすることを
防止し一過負荷防止のためにモ一定格電流以下の時は、
ガイドベーン２を圧力によって支配的に制御する一方で
、設定圧力より低い場合はカイトベーン２を開いて重量
を増加させて圧力を一定に保ち、設定圧力より高い場合
はガイドベーン２を絞って風量を少なくして一定の圧力
をキープする０判断６２では吐出圧力が設定圧Ｐｉｌｌ
！Ｔ−不感帯Ａより高い場合で、かつ判断６４で設定圧
力Ｐ、Ｅ工より吐出圧力が低い場合は何も実行せず制御
に対して不感滞状態を作る。In other words, the CPU 1G prevents the centrifugal compressor 1 from overloading by using a motor overload relay (not shown) to protect the motor when the motor continues to operate for a certain amount of time exceeding the motor rated current. When the current is below the rated current,
While the guide vane 2 is predominantly controlled by pressure, when the pressure is lower than the set pressure, the kite vane 2 is opened and the weight is increased to keep the pressure constant, and when the pressure is higher than the set pressure, the guide vane 2 is throttled to reduce the air volume. In 0 judgment 62, which reduces the pressure to keep a constant pressure, the discharge pressure is the set pressure Pill.
! If it is higher than the T-dead zone A, and the discharge pressure is lower than the set pressures P and E in judgment 64, nothing is executed and a dead state is created for the control.
一方、判断５４．５５．５６のそれぞれがＮＯであると
きＣＰＵ１６は負荷運転から無負荷運転に切換える。On the other hand, when each of the judgments 54, 55, and 56 is NO, the CPU 16 switches from load operation to no-load operation.
即ち、ステップ７０でガイドベーン２に閉指令を、ステ
ップ７１で放風制御弁５に１１Ｍ指令を出力し、その後
判１ｔｌｉ７２で、ガイドベーン２の閉指令直後からの
経過時間がＴ２ＳｅＣに至るまでガイドベーン２の閉指
令を継続し、ステップ７３では上記放風制御弁５を無励
磁に切換えて遠心圧縮機１の無負荷運転を実行する。That is, in step 70, a close command is output to the guide vane 2, and in step 71, a 11M command is output to the air discharge control valve 5, and then in step 1tli72, the guide vane 2 is guided until the elapsed time from immediately after the close command reaches T2SeC. The command to close the vane 2 is continued, and in step 73, the air discharge control valve 5 is switched to non-excitation, and the centrifugal compressor 1 is operated with no load.
するとガイドベーン２で空気が絞られながらも最少限の
空気量が流れ、放風制御弁５によって吐出側を大気解放
することで圧力の増加が防止されサージング領域Ｉに入
ることが防止される。この結果遠心式圧縮機１が無負荷
になる。Then, even though the air is throttled by the guide vane 2, a minimum amount of air flows, and the discharge side is released to the atmosphere by the air discharge control valve 5, thereby preventing an increase in pressure and preventing entering the surging region I. As a result, the centrifugal compressor 1 becomes unloaded.
次にＣＰＵ１６は判断７４で検出吐出圧と設定圧力Ｐ
ＩＩＥＴとの比較演算を実行する。即ち逆止弁２５以降
の圧力が設定圧よりΔＰ低下すると（設定圧力ＰＩＩＥ
Ｔ−ΔＰ）強制的に負荷運転に戻すため、判断７４の判
定かＹＥＳの時、上記の負荷運転を実行する。Next, in judgment 74, the CPU 16 determines whether the detected discharge pressure and the set pressure P are equal to each other.
Performs a comparison operation with IIET. That is, when the pressure after the check valve 25 decreases by ΔP from the set pressure (set pressure PIIE
T-ΔP) In order to forcefully return to load operation, when the determination in judgment 74 is YES, the load operation described above is executed.
まずステップ５７．５８で負荷時間と負荷の運転回転を
カウントし、以降のフローを実行する。つまりプラント
の空気の使用によって無負荷後、吐出側の圧力（レシー
バの圧力を含む）が、設定値に対して、圧力がΔＰを下
回るような時に、遠心式圧縮機１を負荷に自動復帰させ
る。First, in steps 57 and 58, the load time and the operating rotation of the load are counted, and the subsequent flow is executed. In other words, after no load due to the use of plant air, the centrifugal compressor 1 is automatically returned to load when the pressure on the discharge side (including receiver pressure) falls below ΔP with respect to the set value. .
［発明の効果］
以上説明したことから明らかなようにこの発明によれば
次の如き優れた効果を発揮する。[Effects of the Invention] As is clear from the above explanation, the present invention exhibits the following excellent effects.
遠心圧縮機の吸込上流に設けられ吸気の流入角度を変え
るガイドベーンと、吐出下流に設けられ圧縮空気を放出
する放風制御弁と、上記圧縮機の駆動モータ負荷及び吐
出下流の吐出圧を検出する変換器と、これら変換値に応
じて上記ガイドベーン及び放風制御弁を開閉作動するコ
ントローラとを備えたから、遠心圧縮機に一定の吐出圧
力を保持させて、遠心圧縮機がサージング領域で運転さ
れることを阻止できる一方、ガイドベーン及び放風制御
弁の開閉作動を制御して吐出圧の急激な増加を未然に防
止できる。A guide vane is installed upstream of the suction of the centrifugal compressor to change the inflow angle of intake air, a blowout control valve is installed downstream of the discharge to release compressed air, and the drive motor load of the compressor and the discharge pressure downstream of the discharge are detected. and a controller that opens and closes the guide vane and air discharge control valve according to these converted values, so that the centrifugal compressor maintains a constant discharge pressure and operates in the surging region. On the other hand, by controlling the opening and closing operations of the guide vanes and the air discharge control valve, a sudden increase in the discharge pressure can be prevented.
／１． 、１３］面の簡単な説明
第１図はこの発明の好適一実施例を示すフローシート、
第２図は遠心圧縮機の吐出流量−吐出圧性能を示すマツ
プ、第３図は制御装置の制御内容を示すフローシート、
第１１図は従来例としての遠心圧縮機のフローシートで
ある。/1. , 13] Figure 1 is a flow sheet showing a preferred embodiment of the present invention;
Fig. 2 is a map showing the discharge flow rate-discharge pressure performance of the centrifugal compressor, Fig. 3 is a flow sheet showing the control contents of the control device,
FIG. 11 is a flow sheet of a conventional centrifugal compressor.
図中１は遠心式圧縮機、２はガイドベーン、５は放風制
御弁、１５はコントローラ、１９は電流変換器、２３は
圧力変換器である。In the figure, 1 is a centrifugal compressor, 2 is a guide vane, 5 is an air discharge control valve, 15 is a controller, 19 is a current converter, and 23 is a pressure converter.
Claims (1)
ガイドベーンと、吐出下流に設けられ圧縮空気を放出す
る放風制御弁と、上記圧縮機の吐出流量を検出する電流
変換器と、吐出下流の吐出圧を検出する圧力変換器と、
これら検出値に応じて上記ガイドベーン及び放風制御弁
を開閉作動するコントローラとを備えたことを特徴とす
る遠心圧縮機の制御装置。 ２、上記コントローラが上記吐出流量と上記吐出圧の変
換値を、このコントローラが記憶した吐出流量−吐出圧
性能のマップと照合し、そのマップに基づいて上記ガイ
ドベーン及び放風制御弁を開閉作動するように構成され
た請求項１記載の遠心圧縮機の制御装置。 ３、上記コントローラが、上記マップから判定される上
記圧縮機のサージング領域で上記ガイドベーンを閉作動
し上記放風制御弁を開作動するように構成された請求項
２記載の遠心圧縮機の制御装置。 ４、上記コントローラが、上記遠心圧縮機の駆動モータ
の定格電流値以下で上記ガイドベーンを開作動し上記放
風制御弁を閉作動して上記遠心圧縮機を無負荷運転から
負荷運転に切換えるように構成された請求項１記載の遠
心圧縮機の制御装置。[Claims] 1. A guide vane provided upstream of the suction of the centrifugal compressor to change the suction flow rate, an air discharge control valve provided downstream of the discharge to discharge compressed air, and detecting the discharge flow rate of the compressor. a current transducer; a pressure transducer for detecting discharge pressure downstream of the discharge;
A control device for a centrifugal compressor, comprising a controller that opens and closes the guide vane and the air discharge control valve in accordance with these detected values. 2. The controller compares the converted values of the discharge flow rate and the discharge pressure with a map of discharge flow rate-discharge pressure performance stored in this controller, and opens and closes the guide vane and the air discharge control valve based on the map. The centrifugal compressor control device according to claim 1, wherein the centrifugal compressor control device is configured to. 3. Control of a centrifugal compressor according to claim 2, wherein the controller is configured to close the guide vane and open the blow-off control valve in a surging region of the compressor determined from the map. Device. 4. The controller switches the centrifugal compressor from no-load operation to load operation by opening the guide vane and closing the blow-off control valve when the current value is below the rated current value of the drive motor of the centrifugal compressor. 2. A control device for a centrifugal compressor according to claim 1, wherein the control device is configured as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27331188A JPH02123299A (en) | 1988-10-31 | 1988-10-31 | Controller for centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27331188A JPH02123299A (en) | 1988-10-31 | 1988-10-31 | Controller for centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02123299A true JPH02123299A (en) | 1990-05-10 |
Family
ID=17526107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27331188A Pending JPH02123299A (en) | 1988-10-31 | 1988-10-31 | Controller for centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02123299A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07301195A (en) * | 1994-05-06 | 1995-11-14 | Ingersoll Rand Co | Method and equipment for passively damping flow disturbance in centrifugal compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55107097A (en) * | 1979-02-13 | 1980-08-16 | Hitachi Ltd | Surging prevention device for centrifugal compressor |
| JPS55142993A (en) * | 1979-04-20 | 1980-11-07 | Kobe Steel Ltd | Volume control for centrifugal compressor |
| JPS5835291A (en) * | 1981-08-28 | 1983-03-01 | Ishikawajima Harima Heavy Ind Co Ltd | Apparatus for controlling pressure in compressor |
| JPS61101633A (en) * | 1984-10-22 | 1986-05-20 | Fujitsu Ten Ltd | Apparatus for detecting pressure of air supplied to internal-combustion engine |
-
1988
- 1988-10-31 JP JP27331188A patent/JPH02123299A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55107097A (en) * | 1979-02-13 | 1980-08-16 | Hitachi Ltd | Surging prevention device for centrifugal compressor |
| JPS55142993A (en) * | 1979-04-20 | 1980-11-07 | Kobe Steel Ltd | Volume control for centrifugal compressor |
| JPS5835291A (en) * | 1981-08-28 | 1983-03-01 | Ishikawajima Harima Heavy Ind Co Ltd | Apparatus for controlling pressure in compressor |
| JPS61101633A (en) * | 1984-10-22 | 1986-05-20 | Fujitsu Ten Ltd | Apparatus for detecting pressure of air supplied to internal-combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07301195A (en) * | 1994-05-06 | 1995-11-14 | Ingersoll Rand Co | Method and equipment for passively damping flow disturbance in centrifugal compressor |
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