JPH11248299A - Abnormality decision method for air compressor - Google Patents
Abnormality decision method for air compressorInfo
- Publication number
- JPH11248299A JPH11248299A JP4693498A JP4693498A JPH11248299A JP H11248299 A JPH11248299 A JP H11248299A JP 4693498 A JP4693498 A JP 4693498A JP 4693498 A JP4693498 A JP 4693498A JP H11248299 A JPH11248299 A JP H11248299A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- air
- abnormality
- air compressor
- air temperature
- 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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- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空調設備や冷房装
置等に必須の構成である空気圧縮機の異常を判定する方
法に関し、特に製鉄所内における雰囲気温度変化の大き
い屋外等に設置される空気圧縮機の内部異常を、正確か
つ早期に把握することができる判定方法を提案する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for judging an abnormality of an air compressor which is an essential component of an air conditioner, a cooling device, and the like, and more particularly, to an air installed in a steel mill outdoors where the ambient temperature changes greatly. The present invention proposes a determination method that can accurately and early grasp an internal abnormality of a compressor.
【０００２】[0002]
【従来の技術】一般に空気圧縮機の内部異常は、内部部
品の消耗、損傷等に起因する温度変化となって現われる
が、事故を未然に防ぐには、その温度変化を正確かつ早
期に把握することが必要である。2. Description of the Related Art Generally, an internal abnormality of an air compressor appears as a temperature change due to wear and damage of internal parts. To prevent an accident from occurring, the temperature change must be accurately and early grasped. It is necessary.
【０００３】従来、このような空気圧縮機に内部異常が
発生しているかどうかの判定は、吐出側の空気温度を常
時測定して、その温度変化を監視することによって行っ
ていた。しかしながら、吐出側空気温度の変化というの
は、圧縮機が設置される環境の温度変化、即ち吸込側の
空気温度の変化と、圧縮機の内部部品の消耗、損傷等に
よって発生する温度変化とを含む値である。もちろん、
圧縮機の設置環境の温度変化が小さい場合、この変化は
無視することができる。従って、この場合、吐出側空気
温度の変化のみを監視することによっても、圧縮機内部
の異常／正常の判定が比較的正確にできる。Conventionally, whether an internal abnormality has occurred in such an air compressor has been determined by constantly measuring the air temperature on the discharge side and monitoring the temperature change. However, the change in the discharge-side air temperature refers to a change in the temperature of the environment in which the compressor is installed, that is, a change in the air temperature on the suction side, and a change in temperature caused by wear and damage of internal components of the compressor. Contains value. of course,
When the temperature change of the installation environment of the compressor is small, this change can be ignored. Therefore, in this case, the abnormality / normal determination inside the compressor can be made relatively accurately by monitoring only the change in the discharge-side air temperature.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、吐出側
空気温度のみを監視する方法では、圧縮機が設置される
環境の温度変化が大きい場合には、吐出側の空気温度の
変化がその環境の温度変化に起因するのか、それとも圧
縮機内部の異常による温度変化に起因するのかの評価判
定が困難であり、厳密な異常／正常の判定ができない。
これに対して、実際に測定された吐出側空気温度と限界
温度（設定温度）とを比較して判定を行なう方法が提案
されている。しかし、この方法についても限界温度の設
定に際して環境の温度変化分を加える必要があるので判
定精度が低くなり、誤動作および異常情報の遅れという
問題が残った。However, in the method of monitoring only the discharge-side air temperature, if the temperature change in the environment where the compressor is installed is large, the change in the discharge-side air temperature is the temperature of the environment. It is difficult to evaluate and determine whether the change is due to a change or a temperature change due to an abnormality inside the compressor, and it is not possible to make a strict determination of abnormality / normality.
On the other hand, a method has been proposed in which a determination is made by comparing the actually measured discharge-side air temperature with a limit temperature (set temperature). However, also in this method, it is necessary to add a change in the temperature of the environment when setting the limit temperature, so that the accuracy of the determination is lowered, and the problem of malfunction and delay of abnormal information remains.
【０００５】本発明の目的は、従来技術が抱えている上
述した各種の問題点を克服し、圧縮機の内部部品の消
耗、損傷等による異常を正確にしかも迅速に判定する方
法を提案することにある。SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned various problems of the prior art and to propose a method for accurately and quickly determining an abnormality caused by wear and damage of internal parts of a compressor. It is in.
【０００６】[0006]
【課題を解決するための手段】上掲の目的を実現するた
めの空気圧縮機内部異常を判定する方法として、本発明
は、実測された吐出側空気温度と設定された限界温度と
の比較によって判定する方法において、限界温度を空気
圧縮機が設置された外部環境の温度変化に応じて設定す
る方法を採用する。このように圧縮機を取り囲む雰囲
気、即ち外部環境の温度変化に応じて限界値を変化させ
るような温度設定によって、外部の温度変化が大きい場
合でも圧縮機そのものの内部異常による温度変化を正確
にかつ早期に把握することができるようになる。SUMMARY OF THE INVENTION As a method of determining an internal abnormality of an air compressor for realizing the above-mentioned object, the present invention provides a method of comparing an actually measured discharge-side air temperature with a set limit temperature. In the determination method, a method of setting a limit temperature according to a temperature change of an external environment in which the air compressor is installed is adopted. In this manner, by setting the atmosphere surrounding the compressor, that is, the temperature setting that changes the limit value according to the temperature change of the external environment, even if the external temperature change is large, the temperature change due to the internal abnormality of the compressor itself can be accurately and accurately performed. It will be possible to grasp at an early stage.
【０００７】また、本発明は、限界温度は熱力学的理論
式に基づき前記空気圧縮機の吸込側空気温度の関数とし
て予め算出された理論上の吐出側空気温度と異常時の管
理値との和として設定することを特徴とする判定方法を
提案する。このような判定を行う理由は、外部環境の温
度変化は吸込側空気温度の変化として現われるので、吸
込側空気温度が測定毎に変化すれば設定される限界温度
もそれに応じて変化するので、判定精度がより正確にな
るからである。Further, according to the present invention, the limit temperature is defined as a function of a theoretical discharge side air temperature calculated in advance as a function of a suction side air temperature of the air compressor based on a thermodynamic theoretical formula and a control value at the time of abnormality. A determination method characterized by setting as a sum is proposed. The reason for making such a determination is that a temperature change in the external environment appears as a change in the suction-side air temperature, so that if the suction-side air temperature changes every measurement, the set limit temperature also changes accordingly. This is because the precision becomes more accurate.
【０００８】本発明はまた、圧縮器の吸込側空気の温度
変化が反映されるように熱力学的理論式から算出された
理論上の吐出側空気温度に基づいて限界温度を設定し、
実測された吸込側空気温度に対応する理論上の吐出側空
気温度および限界温度をそれぞれ演算し、その演算結果
としての限界温度と実測された吐出側空気温度とを比較
することによって正常／異常を判定することを特徴とす
る空気圧縮機の異常判定方法を提案する。The present invention also sets a limit temperature based on a theoretical discharge-side air temperature calculated from a thermodynamic theoretical formula so as to reflect a temperature change of the suction-side air of the compressor,
Calculate the theoretical discharge-side air temperature and the limit temperature corresponding to the actually measured suction-side air temperature, respectively, and compare the limit temperature as the calculation result with the actually measured discharge-side air temperature to determine normal / abnormal. The present invention proposes a method for determining an abnormality of an air compressor, which is characterized by making a determination.
【０００９】本発明の上記構成において、理論上の吐出
側空気温度Ｔ２は、数式１で示されるような熱力学的理
論式に基づき、吸込側の空気温度Ｔ１の関数として表現
される。即ち、限界温度Ｔ４も実測された吸込側の空気
温度Ｔ１の変動を反映して設定されるので、限界温度Ｔ
４と実測される吐出側空気温度Ｔ２’とを比較し、Ｔ４
＞Ｔ２’である場合には正常、Ｔ４≦Ｔ２’である場合
には異常と判定することができる。従って、吸込側空気
温度がＴ１が測定される毎に空気圧縮器の正常／異常が
判定されるので、外部環境の温度変化が大きい場合でも
圧縮機そのものの内部異常による温度変化を捉らえるこ
とができ、迅速な判定が可能となる共に、圧縮機異常に
よるトラブルを事前に回避することができる。In the above configuration of the present invention, the theoretical discharge-side air temperature T2 is expressed as a function of the suction-side air temperature T1 based on a thermodynamic theoretical formula as shown in Expression 1. That is, the limit temperature T4 is also set to reflect the fluctuation of the actually measured air temperature T1 on the suction side.
4 and the actually measured discharge-side air temperature T2 ′.
> T2 ′, it can be determined as normal, and if T4 ≦ T2 ′, it can be determined as abnormal. Therefore, the normal / abnormal of the air compressor is determined each time the intake air temperature T1 is measured. Therefore, even if the temperature change of the external environment is large, the temperature change due to the internal abnormality of the compressor itself can be detected. This makes it possible to make quick determinations and to avoid troubles due to compressor abnormalities in advance.
【数１】 Ｔ２＝Ｔ１・（Ｐ２／Ｐ１）n-1/n ここで、Ｔ１：実測される吸込側空気温度（°Ｋ） Ｔ２：理論上の吐出側空気温度（°Ｋ） Ｐ１：吸込圧力（kg/cm2abs ） Ｐ２：吐出圧力（kg/cm2abs ） ｎ：ポリトロープ指数T2 = T1 · (P2 / P1) n−1 / n where T1: Actually measured suction-side air temperature (° K) T2: Theoretical discharge-side air temperature (° K) P1: Suction Pressure (kg / cm 2 abs) P2: Discharge pressure (kg / cm 2 abs) n: Polytropic index
【００１０】[0010]
【発明の実施の形態】図１は、本発明にかかる異常判定
方法を具体的に実施するためのシステム構成図であり、
空気圧縮器１の吸込側には吸込んだ空気の温度Ｔ１を測
定する温度センサ３が配設され、またその吐出側には、
吐き出される空気の温度Ｔ２’を測定する温度センサ４
が配置され、それらの温度情報データは演算制御部５に
送られる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system configuration diagram for specifically implementing an abnormality determination method according to the present invention.
On the suction side of the air compressor 1, a temperature sensor 3 for measuring the temperature T1 of the sucked air is provided, and on the discharge side thereof,
Temperature sensor 4 for measuring the temperature T2 'of the discharged air
Are arranged, and their temperature information data is sent to the arithmetic and control unit 5.
【００１１】吸込側で測定された空気温度Ｔ１は、演算
制御部５に送られ、そこで熱力学的理論式から算出され
た理論上の吐出側空気温度Ｔ２が数式１に基づいて常時
演算される。その際に、Ｐ２／Ｐ１は一定（吐出圧力Ｐ
２＝７kg/cm2abs 、吸込圧力Ｐ１＝１kg/cm2abs として
予め設定される）であり、ポリトロープ指数ｎについて
も適切な値が決定される。更に演算で求められた理論上
の吐出側空気温度Ｔ２に異常時の管理値Ｔ３として、た
とえば20℃＝ 293°Ｋ、が加算されて空気圧縮機内にお
ける異常を判定する上で基準となる限界温度Ｔ４として
求められる。The air temperature T1 measured on the suction side is sent to the arithmetic and control unit 5, where the theoretical discharge-side air temperature T2 calculated from the theoretical thermodynamic formula is constantly calculated based on Equation 1. . At this time, P2 / P1 is constant (discharge pressure P
2 = 7 kg / cm 2 abs, suction pressure P1 = 1 kg / cm 2 abs), and an appropriate value is determined for the polytropic index n. Further, for example, 20 ° C. = 293 ° K. is added to the theoretical discharge-side air temperature T2 obtained by the calculation as the control value T3 at the time of abnormality, and the critical temperature becomes a reference when judging the abnormality in the air compressor. It is obtained as T4.
【００１２】限界温度Ｔ４は吸込側空気温度Ｔ１が測定
された時点での雰囲気温度が反映されており、その限界
温度Ｔ４と吐出側で実測される空気温度Ｔ２’との比較
演算が行なわれる。その演算結果がＴ４＞Ｔ２’であれ
ば演算制御部５から表示警報部６にその旨の信号が送ら
れて「正常」と表示され、Ｔ４≦Ｔ２’であれば演算制
御部５から表示警報部６にその旨の信号が送られて「異
常」と表示されると共に警報が出されるので、空気圧縮
機１を駆動している電動機２の運転を即時停止するよう
に構成する。The limit temperature T4 reflects the ambient temperature at the time when the suction side air temperature T1 is measured, and a comparison operation is performed between the limit temperature T4 and the air temperature T2 'actually measured on the discharge side. If the calculation result is T4> T2 ', a signal to that effect is sent from the calculation control unit 5 to the display / warning unit 6 to display "normal", and if T4≤T2', the display control / warning is displayed from the calculation control unit 5. Since a signal to that effect is sent to the unit 6 to indicate "abnormal" and to issue an alarm, the operation of the electric motor 2 driving the air compressor 1 is immediately stopped.
【００１３】[0013]
【発明の効果】以上説明したように、本発明によれば、
圧縮機を取り囲む雰囲気の温度変化が大きいような場合
でも、雰囲気温度の変化に応じた限界温度が設定される
ので、圧縮機そのものの内部異常による温度変化を正確
にかつ早期に判定ができ、圧縮機異常によるトラブルを
事前に回避することができる。As described above, according to the present invention,
Even when the temperature of the atmosphere surrounding the compressor changes greatly, the limit temperature is set in accordance with the change in the ambient temperature. Troubles due to machine errors can be avoided in advance.
【図１】本発明の異常判定方法を具体的に実施するため
のシステム構成図である。FIG. 1 is a system configuration diagram for specifically implementing an abnormality determination method according to the present invention.
１ 空気圧縮機 ２ 電動機 ３ 吸込側温度センサ ４ 吐出側温度センサ ５ 演算制御部 ６ 表示・警報部 DESCRIPTION OF SYMBOLS 1 Air compressor 2 Electric motor 3 Suction side temperature sensor 4 Discharge side temperature sensor 5 Arithmetic control unit 6 Display / alarm unit
Claims (3)
出側空気温度と設定された限界温度との比較によって判
定する方法であって、前記限界温度を空気圧縮機が設置
された外部環境の温度変化に応じて設定することを特徴
とする空気圧縮機の異常判定方法。1. A method for determining an internal abnormality of an air compressor by comparing an actually measured discharge-side air temperature with a set limit temperature, wherein the limit temperature is determined in an external environment in which the air compressor is installed. A method for determining an abnormality of the air compressor, wherein the method is set according to a temperature change of the air compressor.
き前記空気圧縮機の吸込側空気温度の関数として予め算
出された理論上の吐出側空気温度と異常時の管理値との
和として設定されることを特徴とする請求項１に記載の
異常判定方法。2. The limit temperature is defined as a sum of a theoretical discharge-side air temperature calculated in advance as a function of a suction-side air temperature of the air compressor based on a thermodynamic theoretical formula and a control value in an abnormal state. The method according to claim 1, wherein the method is set.
度の測定により空気圧縮機内部の異常を判定する方法に
おいて、熱力学的理論式に基づき吸込側空気温度の関数
として予め算出された理論上の吐出側空気温度に異常時
の管理値を加えて前記空気圧縮機内における異常を判定
する上での限界温度を設定し、実測された吸込側空気温
度に対応する前記理論上の吐出側空気温度および限界温
度をそれぞれ演算し、前記測定された吸込側空気温度に
対応する限界温度と実測された吐出側空気温度とを比較
することによって正常／異常を判定することを特徴とす
る空気圧縮機の異常判定方法。3. A method for judging an abnormality in an air compressor by measuring an air temperature on a suction side and a discharge side of an air compressor, wherein a theory calculated in advance as a function of the air temperature on the suction side based on a thermodynamic theoretical formula. A limit temperature for determining an abnormality in the air compressor is set by adding a control value at the time of abnormality to the upper discharge side air temperature, and the theoretical discharge side air corresponding to the actually measured suction side air temperature is set. An air compressor that calculates a temperature and a limit temperature, and determines normal / abnormal by comparing a limit temperature corresponding to the measured suction-side air temperature with an actually measured discharge-side air temperature. Abnormality determination method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4693498A JPH11248299A (en) | 1998-02-27 | 1998-02-27 | Abnormality decision method for air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4693498A JPH11248299A (en) | 1998-02-27 | 1998-02-27 | Abnormality decision method for air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11248299A true JPH11248299A (en) | 1999-09-14 |
Family
ID=12761158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4693498A Pending JPH11248299A (en) | 1998-02-27 | 1998-02-27 | Abnormality decision method for air compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11248299A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005207644A (en) * | 2004-01-21 | 2005-08-04 | Mitsubishi Electric Corp | Apparatus diagnosing device, refrigeration cycle device, fluid circuit diagnosing method, apparatus monitoring system and refrigeration cycle monitoring system |
| JP2008241121A (en) * | 2007-03-27 | 2008-10-09 | Sanyo Electric Co Ltd | Malfunction detecting device, malfunction detecting method and control program |
| JP2012172957A (en) * | 2011-02-24 | 2012-09-10 | Yanmar Co Ltd | Refrigerant circuit with anomaly detection function for compressor |
| KR20190004582A (en) | 2017-07-04 | 2019-01-14 | 주식회사 엘지화학 | Compressor monitoring system of low density polyethylene production process and monitoring method using the same |
-
1998
- 1998-02-27 JP JP4693498A patent/JPH11248299A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005207644A (en) * | 2004-01-21 | 2005-08-04 | Mitsubishi Electric Corp | Apparatus diagnosing device, refrigeration cycle device, fluid circuit diagnosing method, apparatus monitoring system and refrigeration cycle monitoring system |
| US7558700B2 (en) | 2004-01-21 | 2009-07-07 | Mitsubishi Denki Kabushiki Kaisha | Equipment diagnosis device, refrigerating cycle apparatus, fluid circuit diagnosis method, equipment monitoring system, and refrigerating cycle monitoring system |
| JP2008241121A (en) * | 2007-03-27 | 2008-10-09 | Sanyo Electric Co Ltd | Malfunction detecting device, malfunction detecting method and control program |
| JP2012172957A (en) * | 2011-02-24 | 2012-09-10 | Yanmar Co Ltd | Refrigerant circuit with anomaly detection function for compressor |
| KR20190004582A (en) | 2017-07-04 | 2019-01-14 | 주식회사 엘지화학 | Compressor monitoring system of low density polyethylene production process and monitoring method using the same |
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