JPS59213992A - Ventilator stall preventing device - Google Patents
Ventilator stall preventing deviceInfo
- Publication number
- JPS59213992A JPS59213992A JP8730083A JP8730083A JPS59213992A JP S59213992 A JPS59213992 A JP S59213992A JP 8730083 A JP8730083 A JP 8730083A JP 8730083 A JP8730083 A JP 8730083A JP S59213992 A JPS59213992 A JP S59213992A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- difference signal
- switch
- stall
- 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
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Ventilation (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、並列運転される通風(夷のス1−−ル防止装
買に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to ventilation equipment operated in parallel.
空気、ガス等を通用(幾で通用ザるとき、通風機の故障
によってプラン1へ全体が停止することのないよう通風
機LL 2台設置されて並列運転される場合が多い。し
かしこうした2台の通Jll lXuの並列運転時に両
通風機の負荷がアンバランスになると低貞荷側の通が(
はか押え込、−L4′LCスト−ル(失速)現象が生じ
、流量、圧力か不安定どなり、極端な場合にはプラン1
〜トリッゾに至る場合がある。When air, gas, etc. are used, two ventilators LL are often installed and operated in parallel to prevent the entire system from stopping due to a malfunction of the ventilator. However, these two When the load of both ventilation fans becomes unbalanced during parallel operation of Jll IXU, the ventilation on the low flow side (
-L4' LC stall phenomenon occurs, the flow rate and pressure become unstable, and in extreme cases Plan 1
~May lead to Trizzo.
本発明は、こうし/’−Lλに鋸1の、1lr1列の内
通用(幾の負荷を監視し、アンバランスが発生した場合
に直ちにそのアンバランスか規定値内とイするように自
動的に修正して通Jffil +大のス1ヘールを防止
りることを目的とり−る。The present invention monitors the internal load of saw 1 and 1lr 1 row on /'-Lλ, and automatically adjusts the unbalance to within the specified value when an unbalance occurs. The purpose of this modification is to prevent a large number of errors.
以下本発明の実廠例を図面を参照して説明する。Practical examples of the present invention will be described below with reference to the drawings.
1、1.2図は本発明の一例を示Jもので、並設された
ダクl〜1,2の夫々にt−夕3,4によって駆動され
る通風(幾5.6が設(プられ、旧一つ該通風機5,6
の下流側においてタフhl、2かコ[ンダク1〜ダンパ
7を右した連通ダク1〜8ににす18続されており、更
に前記ダクト1,2の1マ流側か空気予熱器9,1oq
qを介して供給側装置11¥iに接続されている。Figures 1 and 1.2 show an example of the present invention, in which ducts 1 to 1 and 2, which are arranged in parallel, are each provided with ventilation driven by ducts 3 and 4. The old one ventilation fan 5,6
On the downstream side of the ducts 1 to 8, the ducts 1 to 7 are connected to the communication ducts 1 to 8 on the right side, and the air preheater 9, 1 oz
It is connected to the supply side device 11\i via q.
このような通用装置におりる通用制御は、−般に、供給
側装置11側のダクl−1,2に設(プた通風流量δt
12,13からの流量信号を、加算器14によって合冊
し、(の合it量を引算器15により設定値1Gと比較
し、その差に基づき、調節計17により一方に通風機5
,6の特性を合Uるように加算器18を介して設(プた
信号発生器19、及び両方に設E]だ手動自動切替器2
0.21を介し通風制御信号22.23として人口ダン
パ24.25の駆動装置26.27に導いて入口ダンパ
24.25の開度を調節することにより行っている。General control for such general equipment is generally performed by controlling the ventilation flow rate δt installed in the ducts l-1 and 2 on the supply side equipment 11 side.
The flow rate signals from 12 and 13 are combined by an adder 14, and the total amount of (() is compared with the set value 1G by a subtracter 15. Based on the difference, the controller 17 controls one side of the ventilation fan 5.
, 6 is set via an adder 18 (signal generator 19 and both are set) to combine the characteristics of the manual automatic switch 2.
0.21 as a ventilation control signal 22.23 to the drive device 26.27 of the artificial damper 24.25 to adjust the opening degree of the inlet damper 24.25.
しかし上記においては、タクト1,2の全体黒用を制御
しているのみである!こめ、通JB 4315 、 G
のス1〜−ル現象が発生し易い。However, in the above, only the overall blackness of Takt 1 and 2 is controlled! Kome, Tsu JB 4315, G
This phenomenon is likely to occur.
このために、通Jll UNモータ3,4の各モータ電
流28.29を検出し、その一方、例えば28側を基準
として該28から29を引算するようにした引算器30
を設り、該引算器30からの正或いは負の差信号31を
、コモンダクトダンパ7の駆動装置32からの聞又は閉
信号33によって切替わるにうにした切替器34に導入
し、開時の差信号31aが±αの範囲を越えると出力す
るモニタスイッチ35及び閉時の差信号31bが±βの
範囲を越えると出ツノするモニタスイッチ36を介しU
0979部37に導入するようにしてロジック回路3
8ヲ構成する。For this purpose, a subtracter 30 is configured to detect each motor current 28.29 of the Jll UN motors 3 and 4, and subtract 29 from 28 using, for example, the 28 side as a reference.
A positive or negative difference signal 31 from the subtractor 30 is introduced into a switching device 34 which is configured to be switched by the open or closed signal 33 from the drive device 32 of the common duct damper 7. The U
The logic circuit 3 is introduced into the 0979 section 37.
Construct 8.
ロジック回路38は、第2図に示Jように、二!モンダ
ク1−ダンパ7の開時と閉時に分りで設定された異なる
許容値を越えたときに開指令39又は開指令40が出さ
れるようになっている。また[1シック回路38からの
開、閉指令39.40はIt号発生器41に入力され、
該信号発生器41からの連続した聞又は開の補正(gg
42が、加咋器434介して通風制御信号23に加算さ
れると共に、反転器44により正負を反転された後加n
器4!□Iを介して通風制御信号22に加算されるよう
になっている。第2図中46はアンド回路、47はAア
回路、48はノット回路を示す。The logic circuit 38, as shown in FIG. An open command 39 or an open command 40 is issued when different tolerance values set for opening and closing of the damper 7 of the Mondaku 1 are exceeded. In addition, the open and close commands 39 and 40 from the 1 sick circuit 38 are input to the It generator 41,
Continuous gap or open correction from the signal generator 41 (gg
42 is added to the ventilation control signal 23 via the adder 434, and the sign is inverted by the inverter 44.
Vessel 4! It is added to the ventilation control signal 22 via □I. In FIG. 2, 46 is an AND circuit, 47 is an AA circuit, and 48 is a NOT circuit.
上記において、通風機5,6の負荷のハフンスが崩れて
ストールが発生しそうになると、直ちに引算器30にモ
ータ電流28.29の差が生じ、イの差信号31が切t
4器34に送られる。このとき]モンタク1〜タンパ7
が例えば問いていると、その差(Fj ”331が開時
側のモニタスイッチ35に導かれる5J、うに切替器3
4が作動する。このとき差信号31i1か所定の範囲±
αを越える大きさである場合にはロジック部37より間
39又は閉40の指令が出される。In the above, when the load of the ventilation fans 5 and 6 collapses and a stall is about to occur, a difference of motor current 28.29 is immediately generated in the subtracter 30, and the difference signal 31 in A is cut off.
It is sent to the fourth vessel 34. At this time] Montaku 1 to Tampa 7
For example, when asking, the difference (Fj "331 is 5J led to the monitor switch 35 on the open side, the sea urchin switch 3
4 is activated. At this time, the difference signal 31i1 is within the predetermined range ±
If the magnitude exceeds α, the logic unit 37 issues a command to open 39 or close 40.
図示の場合、モータ電流28を基準にしてモータ電流2
つがどの位大きいか或いは小さいかをみているのC1例
えば偏着≧αはモータ電流28が大きくモータ電流29
が小さい異常な状態であることを示している。従って、
モニタスイッチ35から偏差≧αの信号が出ると第2図
のロジック回路38により開指令39が出され、よつC
信号発生器41は連続した開の補正信号42を出力する
ことになる。このため、加算器43を介して低負荷の通
風機6側のダンパ25が開けられて負荷が増加される一
方、同時に反転器44によって閉信号が加算器45に加
算されるようになるので、畠負荷側(基本側)の通風機
5におりる人口ダンパ24か閉じられるように作用りる
。この作動は前記モニタスイッチ35に入力される差信
号31aが±α内に納まるJ、うになるまC行われる1
、また偏差≦−αのときは上記と逆に作用する。In the illustrated case, motor current 2 is based on motor current 28.
For example, if biasing ≧ α, the motor current 28 is large or the motor current 29 is
This indicates a small abnormal condition. Therefore,
When a signal of deviation≧α is output from the monitor switch 35, an open command 39 is issued by the logic circuit 38 in FIG.
The signal generator 41 will output a continuous open correction signal 42. Therefore, the damper 25 on the low-load fan 6 side is opened via the adder 43 to increase the load, and at the same time, a close signal is added to the adder 45 by the inverter 44. It acts to close the artificial damper 24 that goes down to the ventilation fan 5 on the farm load side (basic side). This operation is performed as long as the difference signal 31a input to the monitor switch 35 falls within ±α.
, and when the deviation≦−α, the effect is opposite to the above.
また、]1ンダクトダンパ7が閉のどさに1よ、モニタ
スイッチ36の±βの許容範囲によって制御される。り
なわら、コー[ンタク1〜タンパ7の開によってダクト
1,2が連通ダク]・8で連通された場合ど、コモンダ
クトタンパ7を閉じることによりダク1〜1,2が供給
側装置11を介して連通されIJ場合とでは、ストール
の起き易さが宜なるので、」モンダク1−ダンパ1の開
時を大/Z別に設定した設定値±α、±βで監視するよ
−うにしている。Furthermore, the degree to which the duct damper 7 is closed is controlled by the ±β tolerance range of the monitor switch 36. However, when the common duct tamper 7 is closed, the ducts 1 to 1, 2 are connected to the supply side device 11 when the ducts 1 and 2 are connected to each other by the common duct tamper 7. Since stalls are less likely to occur in the case where the damper 1 is communicated through the IJ, the open time of the damper 1 is monitored at set values ±α and ±β set for large/Z separately. There is.
尚、上記実施例においては並列運転される通風機の負荷
の監視のためモータ電流を使用する場合について説明し
たが、通用俄の人口ダンパの開度差を用いても、或いは
通風(幾の動閾ビッヂ角度等を用いてもよいこと、コモ
ンタフ1−タンパの開時に比し開時にス1−−ルが発生
し易いのて、コ[ンタク1〜ダンパ聞時にのみ作用させ
る、):うに構成してb良いこと、その池水発明の要旨
を逸1]fJ ’v ’、tい範囲(こJ3いて種々変
更を加え得ること、等は勿論である。In the above embodiment, the motor current is used to monitor the load of the ventilation fans operated in parallel, but it is also possible to use the difference in the opening of the artificial damper during operation It is also possible to use a threshold bitch angle, etc., and because stalls are more likely to occur when the common tough 1 - tamper is open than when the tamper is open, the control is used only when the contact 1 - damper is open. It is a good thing that we have missed the gist of the Ikemizu invention.1] fJ 'v', t range (Of course, various changes can be made to this J3, etc.).
上述した本発明の通I!11機のス1〜−ル防止装置に
よれば、並列運転される通風機の負荷を監視してアンバ
ランスが発生したときにその差が規定1直内になるよう
自動的に底圧するようにしたことにより、ストールの発
生を防止し、よって流量、圧力の変動、及びプラントト
リップ等の問題を禾zイ;に防止でさる優れた効果を奏
し冑る。The above-mentioned features of the present invention! According to the stall prevention device of 11 machines, the load of the ventilation fans operated in parallel is monitored and when an imbalance occurs, the bottom pressure is automatically adjusted so that the difference is within the specified 1 shift. By doing so, it is possible to prevent the occurrence of stalls, thereby achieving an excellent effect of preventing problems such as fluctuations in flow rate, pressure, and plant trips.
第1図は本発明の一実施例を示り°説明図、第2図は第
1図のロジック回路の説明図である。
1.2はダク1〜.3,4は七−夕、5,6は通用機、
7はコモンタフ(〜タンパ、22.23は通風制御信号
、24.25は入口タンパ、28.29はモータ電流、
30は引算器、31は差信号、34は切替器、35.3
6はモニタスイッチ、37はロジック部、38はロジッ
ク回路、41は信号発生器、42は補正信号、43は加
紳器、44は反転器、45は加弾器を承り。
特 許 出 願 人
石川島播Ig重工業イ2、式会社
特許出願人代理人
!Iブj訂出願人代理人FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the logic circuit of FIG. 1.2 is Dak 1~. 3 and 4 are Tanabata, 5 and 6 are regular planes,
7 is common tough (~tamper, 22.23 is ventilation control signal, 24.25 is inlet tamper, 28.29 is motor current,
30 is a subtracter, 31 is a difference signal, 34 is a switch, 35.3
6 is a monitor switch, 37 is a logic section, 38 is a logic circuit, 41 is a signal generator, 42 is a correction signal, 43 is an accelerator, 44 is an inverter, and 45 is an accelerator. Patent Application Person Ishikawajima Ban Ig Heavy Industries I2, Type Company Patent Applicant Agent! I BJ revision applicant's agent
Claims (1)
差を取り出づようにした引算器と、該引算器からの差信
号が許容範囲を越えるときに出力するようにしたロジッ
ク回路と、該ロジック回路の出力により前記通風1幾の
負荷をバランスさせるように補正する補正回路を備えた
ことを9、r徴どJ゛る通ff!l 1mのス1〜−ル
防止装置。1) A subtracter that extracts the difference in load using one of the parallel-operated universal machines as a reference, and an output that outputs a difference signal from the subtracter when it exceeds the allowable range. 9. It is equipped with a logic circuit and a correction circuit that corrects the ventilation load so as to balance it by the output of the logic circuit. l 1m slew prevention device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8730083A JPS59213992A (en) | 1983-05-18 | 1983-05-18 | Ventilator stall preventing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8730083A JPS59213992A (en) | 1983-05-18 | 1983-05-18 | Ventilator stall preventing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59213992A true JPS59213992A (en) | 1984-12-03 |
JPH0340240B2 JPH0340240B2 (en) | 1991-06-18 |
Family
ID=13910972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8730083A Granted JPS59213992A (en) | 1983-05-18 | 1983-05-18 | Ventilator stall preventing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59213992A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01108390U (en) * | 1988-01-12 | 1989-07-21 | ||
CN103423190A (en) * | 2013-08-28 | 2013-12-04 | 贵州电力试验研究院 | Parallel operation axial flow primary fan automatic regulating method and device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57397A (en) * | 1980-06-03 | 1982-01-05 | Toshiba Corp | Control method for fan or blower and damper |
-
1983
- 1983-05-18 JP JP8730083A patent/JPS59213992A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57397A (en) * | 1980-06-03 | 1982-01-05 | Toshiba Corp | Control method for fan or blower and damper |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01108390U (en) * | 1988-01-12 | 1989-07-21 | ||
CN103423190A (en) * | 2013-08-28 | 2013-12-04 | 贵州电力试验研究院 | Parallel operation axial flow primary fan automatic regulating method and device |
Also Published As
Publication number | Publication date |
---|---|
JPH0340240B2 (en) | 1991-06-18 |
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