JP2714297B2 - Pump inertia constant measuring device - Google Patents
Pump inertia constant measuring deviceInfo
- Publication number
- JP2714297B2 JP2714297B2 JP34478691A JP34478691A JP2714297B2 JP 2714297 B2 JP2714297 B2 JP 2714297B2 JP 34478691 A JP34478691 A JP 34478691A JP 34478691 A JP34478691 A JP 34478691A JP 2714297 B2 JP2714297 B2 JP 2714297B2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- rotation speed
- rotational speed
- inertia constant
- speed change
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明はポンプの慣性の指標とな
るポンプ慣性定数を測定する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring a pump inertia constant which is an index of the inertia of a pump.
【０００２】[0002]
【従来の技術】通常、ポンプの慣性定数は、次の式(1)
に示すように、そのポンプが持つ慣性モーメントと回転
数の積をトルクで除したものとして定義されている。 τ＝Ｉω／Ｔ …(1) 但し、τ：ポンプ慣性定数、Ｉ：慣性モーメント、ω：
回転数、Ｔ：トルク また、この式(1) は変形すると次の式(2) のようにな
る。 １／２τ＝（１／２・Ｉω2 ）／ωＴ …(2) なお、この式(2) の右辺の分子はポンプが保有している
回転体の運動エネルギーを表し、分母はポンプの出力を
表す。2. Description of the Related Art Generally, the inertia constant of a pump is given by the following equation (1).
As shown in (1), it is defined as the product of the moment of inertia of the pump and the number of revolutions divided by the torque. τ = Iω / T (1) where τ: pump inertia constant, I: moment of inertia, ω:
Rotational speed, T: torque Also, when this equation (1) is transformed, it becomes the following equation (2). 1 / 2τ = (1/2 · Iω 2 ) / ωT (2) The numerator on the right side of the equation (2) represents the kinetic energy of the rotating body held by the pump, and the denominator represents the output of the pump. Represent.
【０００３】この式(2) を物理的に解釈すると、ポンプ
慣性定数τはその時のポンプが持っている運動エネルギ
ーをその時のポンプ出力で消費する場合にかかる時間の
２倍ということになり、ある定常運転状態にあったポン
プが停止する時に、回転数が降下する速さの目安として
産業界では一般に用いられているものである。前記ポン
プ慣性定数τを定義する式(1) において、慣性モーメン
トＩはポンプに固有の値である。また回転数ωとトルク
Ｔは、ポンプと、このポンプに対する流体抵抗等の流体
条件により決まる値であり、その時の定常運転状態が定
まれば決まる値である。従って、ポンプ慣性定数は本
来、ポンプそれ自身の特性と、その時の定常運転状態が
定まれば決まる値であるといえる。When physically interpreting this equation (2), the pump inertia constant τ is twice as long as it takes to consume the kinetic energy of the pump at that time at the pump output. This is commonly used in the industry as a measure of the speed at which the number of revolutions drops when a pump that has been in a steady operation state stops. In the equation (1) that defines the pump inertia constant τ, the inertia moment I is a value unique to the pump. Further, the rotational speed ω and the torque T are values determined by the pump and fluid conditions such as fluid resistance to the pump, and are values that are determined if the steady state operation at that time is determined. Therefore, it can be said that the pump inertia constant is originally a value determined when the characteristics of the pump itself and the steady operation state at that time are determined.
【０００４】しかしながら、実施にポンプの慣性定数を
測定する場合に、定常運転状態において測定しようとす
ると、トルクの測定に多くの不確かさを伴うため、現実
には運転中のポンプを停止させてみて、この間の時間を
測定して「ポンプ慣性定数は回転数が１／２に減少する
時間である」として測定されてきた。これは、次の式
(3) のようなトルクＴが回転数ωの２乗に比例するとい
う仮定が成立する状況下においては、このようにポンプ
慣性定数を回転数が１／２になる時間として測定して
も、前記式(1) の定義に沿った結果が得られることが理
論的に証明されているためである。 Ｔ＝κω2 …(3) 但し、κ：比例定数However, when the inertia constant of the pump is actually measured in a steady operation state, the measurement of torque involves a lot of uncertainty. The time during this period has been measured and measured as "the pump inertia constant is the time during which the number of revolutions decreases by half." This is
In a situation where the assumption that the torque T is proportional to the square of the rotational speed ω as in (3) holds, even if the pump inertia constant is measured as the time when the rotational speed becomes １ ／, This is because it has been theoretically proved that a result according to the definition of the above equation (1) is obtained. T = κω 2 (3) where κ: proportionality constant
【０００５】[0005]
【発明が解決しようとする課題】前記のように運転中の
ポンプを停止させてみて、この時に回転数が１／２にな
る時間としてポンプ慣性定数を測定する方法では、トル
クＴが回転数の２乗に比例しない場合には定義に沿った
ポンプ慣性定数が得られないばかりでなく、本来ポンプ
の回転数が低下し始める直前の流体条件により定まるべ
きポンプ慣性定数が、ポンプの回転速度降下中に流体条
件の変化の影響を受けて正しく測定されない可能性があ
る。According to the method of stopping the operating pump as described above and measuring the pump inertia constant as the time when the rotation speed becomes 1/2 at this time, the torque T is determined by the following equation. When the pump inertia constant is not proportional to the square, not only the pump inertia constant according to the definition cannot be obtained, but also the pump inertia constant which should be determined by the fluid condition immediately before the rotation speed of the pump starts to decrease is determined during the rotation speed reduction of the pump The measurement may not be performed correctly due to the change in the fluid condition.
【０００６】実際の測定においては、これら流体条件の
変化が測定結果にどの程度影響を与えるかを定量的に把
握することは極めて困難で、前記式(3) による仮定も一
般的ではない。また実験技術上もこれら流体条件の変化
の影響を完全に排除することは難しいため、回転数が１
／２になる時間として慣性定数を測定して大きな誤差を
有するのではないかということが、これまで課題となっ
ていた。In an actual measurement, it is extremely difficult to quantitatively grasp how the change in the fluid condition affects the measurement result, and the assumption based on the equation (3) is not general. In addition, it is difficult to completely eliminate the influence of these changes in the fluid conditions from the viewpoint of experimental technology.
It has been an issue to measure whether the inertia constant has a large error as the time to become / 2.
【０００７】本発明の目的とするところは、ポンプ慣性
定数の本来の定義の沿って、どのような場合にも流体条
件の変化の影響を排除した正しい慣性定数を得ることが
できるポンプ慣性定数測定装置を提供することにある。It is an object of the present invention to measure a pump inertia constant in accordance with the original definition of a pump inertia constant so as to obtain a correct inertia constant in any case without the influence of a change in fluid conditions. It is to provide a device.
【０００８】[0008]
【課題を解決するための手段】運転中のポンプが停止に
至る過程における回転数変化を測定する回転数変化測定
手段と、この回転数変化測定手段で測定された回転数情
報を入力して記憶する回転数変化記憶手段と、この回転
数変化記憶手段に記憶された回転数情報を入力してポン
プの回転数が低下し始める瞬間の回転数の変化割合を計
算する回転数変化割合計算手段と、この回転数変化割合
計算手段で計算されたポンプの回転数が低下し始める瞬
間の回転数の変化割合と前記回転数変化記憶手段に記憶
された運転中のポンプが回転数が低下し始める直前の回
転数とからポンプ慣性定数を計算する慣性定数計算手段
を具備することを特徴とする。Means for Solving the Problems A rotational speed change measuring means for measuring a rotational speed change in a process in which a running pump stops, and information on the rotational speed measured by the rotational speed change measuring means is inputted and stored. Rotation speed change storage means, and rotation speed change rate calculation means for inputting rotation speed information stored in the rotation speed change storage means and calculating a change rate of the rotation speed at the moment when the rotation speed of the pump starts to decrease. The change rate of the rotational speed at the moment when the rotational speed of the pump calculated by the rotational speed change ratio calculating means starts to decrease and the operating pump stored in the rotational speed change storage means immediately before the rotational speed starts to decrease. And an inertia constant calculating means for calculating a pump inertia constant from the rotation speed of the pump.
【０００９】[0009]
【作用】運転中のポンプが停止に至る過程の回転数変化
を回転数変化測定手段において測定し、この回転数情報
を回転数変化記憶手段に記憶する。回転数変化記憶手段
に記憶された回転数情報を入力して、回転数変化割合計
算手段においてポンプの回転数が低下し始める瞬間の回
転数の変化割合を計算し、この出力であるポンプの回転
数が低下し始める瞬間の回転数の変化割合と、前記回転
数変化記憶手段に記憶された運転中で回転数が低下し始
める直前のポンプの回転数とから慣性定数計算手段にて
ポンプ慣性定数を計算する。The change in the number of revolutions in the process of stopping the pump during operation is measured by the revolution number change measuring means, and the information on the number of revolutions is stored in the number of revolution change storage means. The rotation speed information stored in the rotation speed change storage unit is input, and the rotation speed change ratio calculation unit calculates the change ratio of the rotation speed at the moment when the rotation speed of the pump starts to decrease. The pump inertia constant is calculated by the inertia constant calculation means from the change rate of the rotation speed at the moment when the rotation speed starts to decrease and the rotation speed of the pump immediately before the rotation speed starts to decrease during operation stored in the rotation speed change storage means. Is calculated.
【００１０】[0010]
【実施例】本発明の一実施例を図面を参照して説明す
る。図１のブロック構成図に示すように、ポンプ試験装
置１には、ポンプ２を図示しない駆動機により運転し、
このポンプ２には、その吸入口と吐出口をループ状に結
んだ配管による流体通路３が設けられた構造になってい
る。このポンプ２のポンプ慣性定数は、ポンプ慣性定数
測定装置10で測定される。An embodiment of the present invention will be described with reference to the drawings. As shown in the block diagram of FIG. 1, a pump 2 is driven by a pump (not shown) in a pump test apparatus 1.
The pump 2 has a structure in which a fluid passage 3 is provided by a pipe connecting its suction port and discharge port in a loop. The pump inertia constant of the pump 2 is measured by the pump inertia constant measuring device 10.
【００１１】このポンプ慣性定数測定装置10は、運転中
のポンプが停止に至る過程における回転数変化を測定す
る回転数変化測定手段11と、この回転数変化測定手段11
で測定された回転数情報を記憶する回転数変化記憶手段
12及び、この回転数変化記憶手段12に記憶された回転数
情報からポンプの回転数が低下し始める瞬間の回転数の
変化割合を計算する回転数変化割合計算手段13と、この
回転数変化割合計算手段13で計算されたポンプの回転数
が低下し始める瞬間の回転数の変化割合と前記回転数変
化記憶手段12に記憶された運転中で回転数が低下し始め
る直前のポンプの回転数とからポンプ慣性定数を計算す
る慣性定数計算手段14とで構成されていて、前記各手段
は、通常計算機により構成している。The pump inertia constant measuring device 10 includes a rotational speed change measuring unit 11 for measuring a rotational speed change in a process of stopping the operating pump, and a rotational speed change measuring unit 11.
Speed change storage means for storing speed information measured in step
A rotational speed change ratio calculating means for calculating a rotational speed change ratio at a moment when the rotational speed of the pump starts to decrease from the rotational speed information stored in the rotational speed change storage device; The rate of change of the rotational speed at the moment when the rotational speed of the pump calculated by the calculating means 13 starts to decrease, and the rotational speed of the pump immediately before the rotational speed starts to decrease during operation stored in the rotational speed change storage means 12 And an inertia constant calculating means 14 for calculating a pump inertia constant from the above. Each of the means is usually formed by a computer.
【００１２】次に上記構成による作用について説明す
る。先ず本発明によるポンプ慣性定数の測定原理は、前
述したようにポンプ慣性定数τは前出の式(1) で定義さ
れている。 τ＝Ｉω／Ｔ …(1) また一般的に、回転体の運動方程式は、次の式(4) で示
される。 Ｔ＝Ｉ・ｄω／ｄｔ …(4) 但し、ｔ：ポンプの回転数が低下し始める瞬間からの経
過時間 さらに、前記式(1) と式(4) より、ポンプ慣性定数τは
次の式(5) で示される。Next, the operation of the above configuration will be described. First, according to the principle of measuring the pump inertia constant according to the present invention, the pump inertia constant τ is defined by the aforementioned equation (1) as described above. τ = Iω / T (1) Generally, the equation of motion of the rotating body is expressed by the following equation (4). T = I · dω / dt (4) where, t: elapsed time from the moment when the rotation speed of the pump starts to decrease. Further, from the above equations (1) and (4), the pump inertia constant τ is given by the following equation. Indicated by (5).
【数１】 (Equation 1)
【００１３】上記式(5) により、ポンプの回転数が低下
し始める直前の回転数ω0 と、ポンプの回転数低下開始
時における回転数の時間微分が測定できれば、ポンプ慣
性定数を決めることができる。If the rotational speed ω 0 immediately before the rotational speed of the pump starts to decrease and the time derivative of the rotational speed at the start of the rotational speed decrease of the pump can be measured by the above equation (5), the pump inertia constant can be determined. it can.
【００１４】次いで、本発明によりポンプの慣性定数を
測定するには、前記ポンプ試験装置１において前記ポン
プ２を定常運転させた後に停止操作を行う。これには、
ポンプ２に例えば駆動機である図示しない電動機を接続
し、電動機を起動してポンプ２を運転する。またポンプ
２を停止させるには、ポンプ２が定常速度にあることを
確認した後に、電動機の電源を切れば、ポンプ２の回転
数は低下し始める。Next, in order to measure the inertia constant of the pump according to the present invention, the pump test apparatus 1 performs a steady operation of the pump 2 and then performs a stop operation. This includes
For example, a motor (not shown), which is a driving machine, is connected to the pump 2, and the motor is started to operate the pump 2. In order to stop the pump 2, if it is confirmed that the pump 2 is at a steady speed and then the power of the electric motor is turned off, the rotation speed of the pump 2 starts to decrease.
【００１５】この時のポンプ２における回転数の推移
は、例えば図２の特性曲線図の曲線15で示すように、時
間経過と共に降下する。即ち、停止に移行する直前で電
動機の電源が切れた時刻ｔ＝０における回転数ω（点Ｂ
で、ω0 ）は、時間経過と共に降下するが、この回転数
ωの減少状態（点Ｂから点Ｄまで）はポンプ２が停止す
る過程における流体条件の変化に影響される。また前記
ポンプ試験装置１のポンプ２の回転数信号は、ポンプ２
に結合した例えば、回転計発電機等から前記ポンプ慣性
定数測定装置10へ出力される。The change in the number of revolutions of the pump 2 at this time falls as time elapses, for example, as shown by a curve 15 in the characteristic curve diagram of FIG. That is, the rotation speed ω (point B) at time t = 0 when the power of the electric motor is turned off immediately before shifting to the stop.
Ω 0 ) falls with the passage of time, but this decreasing state of the rotational speed ω (from point B to point D) is affected by a change in the fluid condition in the process of stopping the pump 2. The rotation speed signal of the pump 2 of the pump test apparatus 1 is
For example, an output from the tachometer generator or the like coupled to the pump inertia constant measuring device 10 is output.
【００１６】ポンプ慣性定数測定装置10の回転数変化測
定手段11では、ポンプ２の停止に移行する直前、即ち、
図２の曲線15における点Ａの運転中より、点Ｂの回転数
が低下し始めた瞬間の時刻ｔ＝０の時、及び、逐次時刻
ｔの経過に伴う、夫々適宜の時刻における回転数、さら
に、ポンプ２の停止直前である点Ｃと、回転数が零にな
った点Ｄでの回転数を測定して、この回転数変化情報を
前記回転数変化記憶手段12に出力する。In the rotational speed change measuring means 11 of the pump inertia constant measuring device 10, immediately before shifting to the stop of the pump 2, that is,
During the operation at the point A in the curve 15 in FIG. 2, the rotation speed at the time t = 0 at the moment when the rotation speed of the point B starts to decrease, and the rotation speed at an appropriate time with the elapse of the sequential time t, Further, the number of rotations at a point C immediately before the stop of the pump 2 and at a point D at which the number of rotations becomes zero is measured, and this rotation number change information is output to the rotation number change storage means 12.
【００１７】回転数変化記憶手段12では、回転数変化測
定手段11からのポンプ２の回転数が定常運転中から停止
に至る過程で時間と共に変化する回転数変化情報を記憶
する。また前記回転数変化割合計算手段13は、前記回転
数変化記憶手段12が記憶している回転数変化情報を取込
み、回転数とポンプ２の回転数が低下し始めたとき（点
Ｂ）からの時間を用いて、ポンプ２の回転数が低下し始
めた瞬間（点Ｂ）における回転数の時間変化割合を求め
る。このポンプの回転数が低下し始めた瞬間の回転数の
時間変化割合は、ポンプの回転数が低下し始めた瞬間に
おける回転数の微係数であるから、数値計算により求め
ることができる。The rotational speed change storage means 12 stores information on the rotational speed change from the rotational speed change measuring means 11 which changes with time in the process from the steady operation to the stoppage of the pump 2. Further, the rotation speed change ratio calculating means 13 takes in the rotation speed change information stored in the rotation speed change storage means 12, and starts from when the rotation speed and the rotation speed of the pump 2 start to decrease (point B). Using the time, the time change ratio of the rotation speed at the moment when the rotation speed of the pump 2 starts to decrease (point B) is obtained. Since the time rate of change of the rotation speed at the moment when the rotation speed of the pump starts to decrease is a differential coefficient of the rotation speed at the moment when the rotation speed of the pump starts to decrease, it can be obtained by numerical calculation.
【００１８】但し、注意すべきことは、ここで求められ
た回転数の時間変化割合は、ポンプの回転数が低下し始
めた瞬間におけるものであるから、ポンプの回転数低下
が始まってからの流体条件の変化には何ら影響されない
ことである。次に回転数変化割合計算手段13における回
転数の時間変化割合の求め方をより具体的に説明する。However, it should be noted that the time change ratio of the rotation speed obtained here is the moment when the rotation speed of the pump starts to decrease. It is unaffected by changes in fluid conditions. Next, how to calculate the time change ratio of the rotation speed in the rotation speed change ratio calculation means 13 will be described more specifically.
【００１９】回転数変化割合計算部６において、ポンプ
の回転数低下が始まってから後の回転数変化を分母をＫ
次の多項式とした、式(6) でフィッティングする。In the rotational speed change ratio calculating section 6, the rotational speed change after the start of the decrease in the rotational speed of the pump is expressed by K as the denominator.
Fit with the following polynomial, equation (6).
【数２】 (Equation 2)
【００２０】上記式(6) ，(7) を用いると、ポンプの回
転数が低下し始めた瞬間における回転数の変化割合は次
の式(8) で示される。Using the above equations (6) and (7), the rate of change in the number of revolutions at the moment when the number of revolutions of the pump starts to decrease is expressed by the following equation (8).
【数３】 (Equation 3)
【００２１】慣性定数計算手段14では前出の式(5) を計
算する。式(5) 中で、ω0 は回転数変化記憶手段12に記
憶されているポンプの回転数が低下し始める直前の回転
数であり、The inertia constant calculating means 14 calculates the above equation (5). In Equation (5), ω 0 is the rotation speed immediately before the rotation speed of the pump stored in the rotation speed change storage unit 12 starts to decrease,
【数４】 この時刻０における微係数は、式(8) で示された回転数
変化割合計算手段13において計算されたポンプの回転数
が低下し始めた瞬間における回転数変化割合である。(Equation 4) The differential coefficient at time 0 is the rotational speed change rate at the moment when the rotational speed of the pump calculated by the rotational speed change rate calculating means 13 shown in the equation (8) starts to decrease.
【００２２】従って、慣性定数計算手段14においては、
ポンプ慣性定数τは式(5) より、次の式(9) のように表
わされる。Therefore, in the inertia constant calculating means 14,
From the equation (5), the pump inertia constant τ is expressed as the following equation (9).
【数５】 (Equation 5)
【００２３】このように、式(6) を用いてフィッティン
グすると、式(6) のフィッティング次数を何次まで取っ
ても、ポンプ慣性定数τは１次のフィッティング係数と
ポンプ停止直前の回転数で決まる。As described above, when fitting is performed by using the equation (6), the pump inertia constant τ is determined by the first-order fitting coefficient and the number of rotations immediately before the pump stops, regardless of the order of the fitting of the equation (6). Decided.
【００２４】またフィッティング次数Ｋについては、１
次のフィッティング係数ａ1 の誤差が最小になるように
決定することにより、ポンプ慣性定数τを精度良く、し
かも簡単に決定することができる。さらに、この一実施
例においては、フィッティング式に、境界条件の式(7)
が取込まれている。この式は、決定されたフィッティン
グ式において、回転数がω0 となるところをポンプ停止
の開始時刻とすることを示している。この境界条件によ
り、ポンプ停止時刻決定についての実験的な誤差が排除
され、さらに精度良くポンプ慣性定数を決定することが
できる。For the fitting order K, 1
By determining such that the error of the next fitting coefficient a 1 is minimized, the pump inertia constant τ can be determined accurately and easily. Further, in this embodiment, in the fitting equation, the boundary condition equation (7)
Has been incorporated. This equation indicates that the point at which the rotational speed becomes ω 0 in the determined fitting equation is the pump stop start time. With this boundary condition, an experimental error in determining the pump stop time is eliminated, and the pump inertia constant can be more accurately determined.
【００２５】[0025]
【発明の効果】以上本発明によれば、ポンプ慣性定数を
求めるために、ポンプの回転数が低下し始めるが直前の
回転数と、ポンプの回転数が低下し始めた瞬間における
回転数の時間変化割合しか用いないためポンプ慣性定数
の定義に忠実で、しかもポンプ停止後の流体条件の変化
に影響されない高精度の測定を行うことができる効果が
ある。As described above, according to the present invention, in order to obtain the pump inertia constant, the rotation speed of the pump starts to decrease but the time between the rotation speed immediately before and the rotation speed at the moment when the rotation speed of the pump starts to decrease. Since only the change rate is used, there is an effect that the measurement can be performed with high accuracy, which is faithful to the definition of the pump inertia constant and is not affected by the change in the fluid condition after the pump is stopped.
【図１】本発明のポンプ慣性定数測定装置の一実施例を
示すブロック構成図。FIG. 1 is a block diagram showing an embodiment of a pump inertia constant measuring apparatus according to the present invention.
【図２】ポンプの定常運転から停止に至る間の回転数を
示す特性曲線図。FIG. 2 is a characteristic curve diagram showing a rotation speed during a period from a steady operation to a stop of the pump.
１…ポンプ試験装置、２…ポンプ、10…慣性定数測定装
置、11…回転数変化測定手段、12…回転数変化記憶手
段、13…回転数変化割合計算手段、14…慣性定数計算手
段、点Ａ…運転中、点Ｂ…回転数が低下し始める瞬間、
点Ｃ…停止直前、点Ｄ…停止時点。DESCRIPTION OF SYMBOLS 1 ... Pump test apparatus, 2 ... Pump, 10 ... Inertia constant measuring apparatus, 11 ... Rotation speed change measuring means, 12 ... Rotation speed change storage means, 13 ... Rotation speed change ratio calculating means, 14 ... Inertia constant calculating means, point A: During operation, point B: The moment when the rotation speed starts to decrease,
Point C: Immediately before stopping, Point D: Time of stopping.
Claims (1)
る回転数変化を測定する回転数変化測定手段と、この回
転数変化測定手段で測定された回転数情報を入力して記
憶する回転数変化記憶手段と、この回転数変化記憶手段
に記憶された回転数情報を入力してポンプの回転数が低
下し始める瞬間の回転数の変化割合を計算する回転数変
化割合計算手段と、この回転数変化割合計算手段で計算
されたポンプの回転数が低下し始める瞬間の回転数の変
化割合と前記回転数変化記憶手段に記憶された運転中の
ポンプが回転数が低下し始める直前の回転数とからポン
プ慣性定数を計算する慣性定数計算手段を備えたことを
特徴とするポンプ慣性定数測定装置。1. A rotational speed change measuring means for measuring a rotational speed change in a process of stopping an operating pump, and a rotational speed change which inputs and stores information on the rotational speed measured by the rotational speed change measuring device. Storage means; rotation speed change rate calculating means for inputting rotation speed information stored in the rotation speed change storage means to calculate a rotation speed change rate at the moment when the rotation speed of the pump starts to decrease; The change rate of the rotation speed at the moment when the rotation speed of the pump calculated by the change ratio calculation means starts to decrease, and the rotation speed immediately before the rotation speed of the operating pump stored in the rotation speed change storage means starts to decrease. An inertia constant calculation unit for calculating a pump inertia constant from the apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34478691A JP2714297B2 (en) | 1991-12-26 | 1991-12-26 | Pump inertia constant measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34478691A JP2714297B2 (en) | 1991-12-26 | 1991-12-26 | Pump inertia constant measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05180170A JPH05180170A (en) | 1993-07-20 |
| JP2714297B2 true JP2714297B2 (en) | 1998-02-16 |
Family
ID=18371976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34478691A Expired - Fee Related JP2714297B2 (en) | 1991-12-26 | 1991-12-26 | Pump inertia constant measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2714297B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157974A (en) * | 2015-09-10 | 2015-12-16 | 福州大学 | High pressure bulk flow cartridge inserted valve test system based on LabVIEW and realization method |
-
1991
- 1991-12-26 JP JP34478691A patent/JP2714297B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05180170A (en) | 1993-07-20 |
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