JPH04140497A - Magnet pump - Google Patents
Magnet pumpInfo
- Publication number
- JPH04140497A JPH04140497A JP26290190A JP26290190A JPH04140497A JP H04140497 A JPH04140497 A JP H04140497A JP 26290190 A JP26290190 A JP 26290190A JP 26290190 A JP26290190 A JP 26290190A JP H04140497 A JPH04140497 A JP H04140497A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- pump
- detection coil
- leakage flux
- coil
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 230000004907 flux Effects 0.000 claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はマグネットポンプ、特に、回転に伴うポンプマ
クネットの漏洩磁束を検出する検出コイル付きのマグネ
ットポンプに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic pump, and particularly to a magnetic pump equipped with a detection coil for detecting leakage magnetic flux of a pump magnet as it rotates.
従来の技術とその問題点
従来、この種のマグネットポンプは、検出コイルがその
軸線がポンプシャフトの長さ方向に向く設置になってい
る。これによると、ポンプマグネットの漏洩磁束につい
て、検出コイルに発生する起電力、つまり検出コイルの
検出電圧か低く、マグネット漏洩磁束の検出によるポン
プ運転状態の把握を必ずしも適切に行い得るまでには至
らない。BACKGROUND ART AND PROBLEMS Conventionally, in this type of magnet pump, the detection coil is installed with its axis oriented in the longitudinal direction of the pump shaft. According to this, regarding the leakage magnetic flux of the pump magnet, the electromotive force generated in the detection coil, that is, the detection voltage of the detection coil is low, and it is not necessarily possible to properly understand the pump operating status by detecting the magnet leakage magnetic flux. .
因みに、かかる従来技術で得られる検出コイルの起電力
は、電圧計を指示させる程度が限界で、ポンプの運転停
止とか警報器作動等に資するには、増幅器等の補助的機
器が必要となる。補助的機器の助けを借りる必要がある
ことは、設備上コスト高で複雑となる。Incidentally, the electromotive force of the detection coil obtained with such conventional technology is limited to the level that indicates the voltmeter, and auxiliary equipment such as an amplifier is required to contribute to stopping the operation of the pump or activating an alarm. The need to rely on auxiliary equipment is costly and complex in terms of equipment.
発明が解決しようとする課題点は、上記従来1術による
前示問題点である。The problem to be solved by the present invention is the problem mentioned above with the above-mentioned conventional method.
即ち、本発明の目的は、増幅器等補助的機器イ必要とせ
ずに、マグネット漏洩磁束についての6出コイルの検出
電圧を取り出して、ポンプの運◆状況監視、異常状態等
のための対処に資するこ2ができる、マグネットliA
洩磁束検出コイル付きニゲネットポンプを開発するにあ
る。That is, an object of the present invention is to extract the detected voltage of the 6-output coil regarding the magnet leakage flux without requiring any auxiliary equipment such as an amplifier, and to contribute to monitoring the operation status of the pump and dealing with abnormal conditions. Magnet liA that can do these two things
To develop a Nigenet pump with leakage flux detection coil.
問題点を解決するための手段
上記目的を達成するために、本発明は特許請求の範囲の
項に示したように、ポンプマグネットC端面近傍に配置
されるマグネット漏洩磁束検出コイルを、その軸線がポ
ンプシャフト半径方向に座く配置に改変したことを最も
主要な特徴としてしる。Means for Solving the Problems In order to achieve the above object, the present invention provides a magnetic leakage flux detection coil disposed near the end face of the pump magnet C such that its axis is The most important feature is that the pump shaft has been changed to sit in the radial direction.
この構成をとることによって、マグネット漏洩磁束につ
いての検出コイルの検出電圧が、マグネット及び検出コ
イル仕様(但し検出コイルの向きを除く)が同じで、従
来の約20〜30倍と相当高くなった。かくて、前示所
期の目的は達成される。By adopting this configuration, the detection voltage of the detection coil regarding magnet leakage magnetic flux is considerably higher, about 20 to 30 times that of the conventional one, with the magnet and detection coil specifications (however, except for the direction of the detection coil) being the same. Thus, the stated purpose is achieved.
本発明者の研究によると、駆動及び従動マグネットの相
関位置による漏洩磁束密度のベクトルは、軸受の摩耗が
零の時、ポンプシャフト軸線に対し殆ど垂直に近いやや
前傾での半径方向であり、軸受の摩耗が進むにつれ、そ
の前傾が度合いを増すという、特定な指向であることが
判明した。According to the research of the present inventor, the vector of leakage magnetic flux density due to the relative positions of the driving and driven magnets is a radial direction that is almost perpendicular to the pump shaft axis and slightly tilted forward when the bearing wear is zero. It was found that as bearing wear progresses, the degree of forward tilt increases, which is a specific orientation.
この漏洩磁束密度ベクトルの指向に、本発明に係る検出
コイルの配置が、その向きにおいて適合し、漏洩磁束の
検出電圧が上記のように著しく高くなるのである。The arrangement of the detection coil according to the present invention matches the direction of this leakage magnetic flux density vector, and the detection voltage of the leakage magnetic flux becomes significantly high as described above.
また本発明者の研究によれば、従動マグネットのアンバ
ランスによる振れの影響が漏洩磁束変化に最も太き(現
れるのは、マグネット並列円の約90’角の下側円分に
ついてであることが判った。Furthermore, according to the research of the present inventor, the effect of deflection due to unbalance of the driven magnet has the largest effect on the change in leakage magnetic flux (it appears in the lower circle of approximately 90' angle of the magnet parallel circle). understood.
またラジアル軸受の摩耗による影響が漏洩磁束変化に大
きく現れる、及びキャビテーションによる影響が漏洩磁
束変化に大きく現れるのも、前記の円分領域においてで
あることか判明した。かくてマグネット並列円の角度9
0°の下側円分に相当する領域において、マグネット端
面近傍に検出コイルを前示向きで配置すると、漏洩磁束
についての検出コイルの検出成果が向上することは明ら
かである。It has also been found that it is in the above-mentioned circle region that the influence of wear of the radial bearing appears largely in changes in leakage magnetic flux, and the influence of cavitation appears largely in changes in leakage magnetic flux. Thus, the angle of the magnet parallel circles is 9
It is clear that when the detection coil is arranged in the forward direction near the end face of the magnet in the region corresponding to the lower circle of 0°, the detection result of the detection coil regarding leakage magnetic flux is improved.
実施例
次に、本発明の実施態様例を示す添付図面を参照して、
本発明を説明する。EXAMPLES Reference will now be made to the accompanying drawings showing example embodiments of the invention.
The present invention will be explained.
図で参照符号(1)がマグネットポンプを示しており、
これはポンプが回転している時、マグネットの漏洩磁束
を検出する検出コイル(2)を備えた点を除き、この種
検出コイルないしの従来マグネットポンプと変るところ
がない。検出コイル(2)は、その軸線かポンプシャフ
ト(3)半径方向向きとなるようにして、ポンプマグネ
ットの端面近傍に、マク′ネット並列円の角度90°の
下側円分に相当する領域に配置されている。ポンプ吐出
口(9)は検出コイル(2)の配置と反対側、つまり上
側にある。ポンプマグネットの端面近傍に対する検出コ
イル(2)の配置は、駆動マグネット(4)について、
なされるのが好ましい。そうするのが、マグネットに対
し最も望ましい対間距離及び関係位置の下に、検出コイ
ル(2)を前記所定の向きで配置するのに好都合である
。検出コイル(2)は、ポンプマク゛ネット並列円にお
けるマグネットのそれぞれについてではなく、一つにつ
いて配置すればよい。駆動マグネット(4)を回転させ
るモータ(8)は可変速型である。In the figure, reference numeral (1) indicates a magnet pump,
This is no different from conventional magnet pumps using this type of detection coil, except for the fact that it is equipped with a detection coil (2) that detects leakage magnetic flux from the magnet when the pump is rotating. The detection coil (2) is placed near the end face of the pump magnet in an area corresponding to the lower circle at an angle of 90° of the Mac'net parallel circle, with its axis oriented in the radial direction of the pump shaft (3). It is located. The pump outlet (9) is located on the opposite side to the arrangement of the detection coil (2), that is, on the upper side. The arrangement of the detection coil (2) near the end face of the pump magnet is as follows for the drive magnet (4):
Preferably. Doing so is convenient for locating the detection coil (2) in said predetermined orientation below the most desirable pairwise distance and relative position to the magnet. The detection coil (2) may be arranged for one magnet rather than for each of the magnets in the pump magnet parallel circle. The motor (8) that rotates the drive magnet (4) is of a variable speed type.
ポンプ運転中、つまりインペラ(5)回転中、軸受(6
)の摩耗に基づく従動マグネット(7)のシャフト(3
)軸線方向への変位によるマグネット漏洩磁束は、検出
コイル(2)が検出する。During pump operation, that is, while the impeller (5) is rotating, the bearing (6
) of the shaft (3) of the driven magnet (7).
) Magnet leakage magnetic flux due to displacement in the axial direction is detected by the detection coil (2).
また駆動マグネット(4)に対する従動マグネット(7
)の軸線の周り方向へのずれによる漏洩磁束、アンバラ
ンス或いは軸受(6)のラジアル方向摩耗lこ基づく従
動マグネット(7)の振れによる漏洩磁束も、検出コイ
ルが検出する。Also, the driven magnet (7) is connected to the driving magnet (4).
) The detection coil also detects leakage magnetic flux due to deviation in the circumferential direction of the axis of the magnet (7), and leakage magnetic flux due to deflection of the driven magnet (7) due to unbalance or radial wear of the bearing (6).
この検出した漏洩磁束は、ポンプ運転状況(軸受摩耗度
)の監視について、或いはポンプの異常状態例えば空運
転、キャビテーション、従動マグネットの振れ等につい
ての対処のための、情報として利用できる。The detected leakage magnetic flux can be used as information for monitoring the pump operating status (bearing wear degree) or for dealing with abnormal conditions of the pump, such as dry running, cavitation, and deflection of the driven magnet.
この検出漏洩磁束の利用例が、第3図に示されている。An example of the use of this detected leakage magnetic flux is shown in FIG.
第3図でc I M)は駆動マグネット(4)を回転さ
せる駆動機〔モータ(8)〕としての〕インダクション
モータ(R)、(T)、(S)は同モータの三相交流回
路の各相、(MCB)は遮断器、(’MC)は電磁接触
機、(T HR)はサーマルリレー (CT)は変流器
、(CP)はモータ(llvi)電流/検出コイル(2
)の検出電圧演算器、(20)は検出コイル(2)の検
出電圧出力端子を示している。演算器(CP)は、マイ
クロコンピュータを適用できる。該マイクロコンピュー
タは、上記のポンプ運転状況監視、異常状態の対応のた
めの人、圧力信号を処理するインターフェイスと、ポン
プ運転状況監視、異常状態の対応のための必要なデータ
を記憶されたメモリと、ポンプ運転状況監視、異常状態
の対応のためのモータ(I M)電流/検出コイル(2
)検出電圧演算処理をするマイクロプロセッサを包含し
ている(第4図)。In Fig. 3, c I M) is the drive machine [motor (8)] that rotates the drive magnet (4); induction motors (R), (T), and (S) are the three-phase AC circuits of the same motor. For each phase, (MCB) is a circuit breaker, ('MC) is a magnetic contactor, (THR) is a thermal relay, (CT) is a current transformer, (CP) is a motor (llvi) current/detection coil (2
), and (20) indicates the detection voltage output terminal of the detection coil (2). A microcomputer can be applied to the computing unit (CP). The microcomputer includes a person for monitoring the pump operating status and responding to abnormal conditions, an interface for processing pressure signals, and a memory storing necessary data for monitoring the pump operating status and responding to abnormal conditions. , motor (IM) current/detection coil (2) for monitoring pump operating status and responding to abnormal conditions.
) It includes a microprocessor that performs detection voltage calculation processing (Fig. 4).
ポンプ運転の定常状況及び異常状態につき、モータ電流
と検出コイル(2)の検出電圧を演算器(CP)が演算
し、ポンプの回転数(流量)に即応した情報の圧力を出
す。その情報出力は適当な機器、例えばポンプ運転制御
回路(図示せず)の入力に充当すればよい。A computing unit (CP) calculates the motor current and the detection voltage of the detection coil (2) for the steady state and abnormal state of pump operation, and outputs pressure information that immediately corresponds to the number of revolutions (flow rate) of the pump. The information output may be applied to an appropriate device, such as a pump operation control circuit (not shown).
発明の効果
上記のように、本発明によれば増幅器等補助的機器を必
要とせずに、マグネット漏洩磁束についての検出コイル
の検出電圧を取り出して、ポンプの運転状況監視、異常
状態等のための対処に資するとこかできる、マクネット
漏洩磁束検出コイル付きマクネットポンプの開発か体現
される。Effects of the Invention As described above, according to the present invention, the detection voltage of the detection coil for magnet leakage flux can be extracted without the need for auxiliary equipment such as an amplifier, and can be used to monitor pump operating conditions, detect abnormal conditions, etc. The development of a McNet pump with a McNet leakage magnetic flux detection coil that can help address this issue is being realized.
第1図は本発明の一実施例を示す縦断面図、第2図は検
出コイルの配置態様を示す正面図(第1図■〜■線視相
当図)、第3図は検出コイルが検出したマグネット漏洩
磁束の利用例を示す回路図、第4図はマグネットポンプ
を駆動するモータの電流と検出コイルの検出電圧を演算
する演算器としてのマイクロコンピュータ、検出コイル
の検出電圧出力端子、及び第3図の回路における変流器
の関係を示すブロック線図である。
(1)・・・マグネットポンプ
(2)・・・検出コイル
(3)・・・ポンプシャフト
(4)・・・駆動マグネット
(5)・・・インペラ
(6)・・・軸受
(7)・・・従動マクネット
(8)・・・モータ
(20)・・・検出コイルの検出電圧出力端(CT)・
・・変流器
(CP)・・・ポンプ駆動機としてのインダクションモ
ータのモータ電流と検出コイルの検
出電圧を演算する演算器(コンピュー
タ)
(以 上)
第
図
第
図Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a front view showing the arrangement of the detection coil (corresponding to Fig. 1), and Fig. 3 shows the detection coil detecting Figure 4 is a circuit diagram showing an example of the use of magnet leakage magnetic flux. FIG. 4 is a block diagram showing the relationship of current transformers in the circuit of FIG. 3; (1) Magnet pump (2) Detection coil (3) Pump shaft (4) Drive magnet (5) Impeller (6) Bearing (7) ... Driven Macnet (8) ... Motor (20) ... Detection voltage output terminal (CT) of detection coil.
...Current transformer (CP)...Calculating unit (computer) that calculates the motor current of the induction motor as a pump driver and the detection voltage of the detection coil (above)
Claims (3)
うマグネットの漏洩磁束を検出する検出コイルが、その
軸線をポンプシャフト半径方向向きに配置されているこ
とを特徴とするマグネットポンプ。(1) A magnet pump characterized in that a detection coil for detecting leakage magnetic flux of the magnet as the pump rotates is arranged near the end face of the pump magnet, with its axis oriented in the radial direction of the pump shaft.
の配置が、マグネット並列円の角度90゜の下側円分相
当領域にて、なされていることを特徴とする請求項1記
載のマグネットポンプ。(2) The magnet pump according to claim 1, wherein the detection coil is arranged near the end face of the pump magnet in an area corresponding to a lower circle of a 90° angle of parallel circles of the magnets.
の配置が、駆動マグネットについて、なされていること
を特徴とする請求項1または2記載のマグネットポンプ
。(3) The magnet pump according to claim 1 or 2, wherein the detection coil is arranged near the end face of the pump magnet with respect to the drive magnet.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26290190A JPH0751956B2 (en) | 1990-09-28 | 1990-09-28 | Magnet pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26290190A JPH0751956B2 (en) | 1990-09-28 | 1990-09-28 | Magnet pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04140497A true JPH04140497A (en) | 1992-05-14 |
JPH0751956B2 JPH0751956B2 (en) | 1995-06-05 |
Family
ID=17382187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26290190A Expired - Lifetime JPH0751956B2 (en) | 1990-09-28 | 1990-09-28 | Magnet pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0751956B2 (en) |
-
1990
- 1990-09-28 JP JP26290190A patent/JPH0751956B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0751956B2 (en) | 1995-06-05 |
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