JPS60256591A - Capacity regulator for screw compressor - Google Patents
Capacity regulator for screw compressorInfo
- Publication number
- JPS60256591A JPS60256591A JP11294684A JP11294684A JPS60256591A JP S60256591 A JPS60256591 A JP S60256591A JP 11294684 A JP11294684 A JP 11294684A JP 11294684 A JP11294684 A JP 11294684A JP S60256591 A JPS60256591 A JP S60256591A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- air
- suction port
- compressor
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、スクリュー圧縮機の吐出圧力を大気に放出し
負荷軽減を行うものに好適な容量調整装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a capacity adjustment device suitable for a device that discharges the discharge pressure of a screw compressor to the atmosphere to reduce the load.
第１図に従来例としてスクリュー圧縮機の制御方法を示
す。空気は吸入絞り弁１から吸込まれ。FIG. 1 shows a conventional control method for a screw compressor. Air is sucked in through intake throttle valve 1.
圧縮機２で昇圧され、逆止弁３．オイルセパレータ４．
逆止弁５．調圧弁６を通の吐出配管７に吐出される。The pressure is increased by the compressor 2, and the check valve 3. Oil separator 4.
Check valve 5. It is discharged to a discharge pipe 7 passing through a pressure regulating valve 6.
使用空気量が減少し、圧縮機２の吐出圧力が上昇すると
、圧力調整弁８が開き、吸入絞り弁１のピストン、室Ａ
に圧力をかけ、弁９の開度を使用意気量に合せ調整し、
圧縮機２の吸入空気量を減少させる。更に使用空気量が
減少すると、弁９閉じ、圧縮機２の吐出側圧力を大気に
放出して低下させ圧縮に要する動力の軽減を図っている
。When the amount of air used decreases and the discharge pressure of the compressor 2 increases, the pressure regulating valve 8 opens, and the piston of the suction throttle valve 1 and the chamber A
Apply pressure to the valve, adjust the opening degree of valve 9 according to the amount of energy used,
Decrease the intake air amount of the compressor 2. When the amount of air used further decreases, the valve 9 is closed and the pressure on the discharge side of the compressor 2 is released to the atmosphere to be lowered, thereby reducing the power required for compression.
この方法として、圧縮機２の吸入口の圧力の低下を大気
放出開始の信号とし、吐出配管７の圧力低下を圧縮再開
の信号としている。In this method, a decrease in pressure at the suction port of the compressor 2 is used as a signal to start releasing air into the atmosphere, and a decrease in pressure in the discharge pipe 7 is used as a signal to restart compression.
吐出配管７の圧力スイッチ１０は圧力調整弁８が開き始
める圧力Ｐ１より少し低い圧力Ｐ２で３方電磁弁１１の
通路をａ７ｂとし、真空弁１２に圧縮機の吸入口圧力を
導く。従って圧縮機の吸入圧が一定の値Ｐ４に下がった
ときに真空弁１２は浦きオイルセパレータ４の圧力をピ
ストン室Ａにに導びき弁９を閉じるとともに、この通路
からセパレータ４の圧力を大気に放出する。The pressure switch 10 of the discharge pipe 7 sets the passage of the three-way solenoid valve 11 to a7b at a pressure P2 slightly lower than the pressure P1 at which the pressure regulating valve 8 begins to open, and guides the suction port pressure of the compressor to the vacuum valve 12. Therefore, when the suction pressure of the compressor drops to a certain value P4, the vacuum valve 12 guides the pressure of the oil separator 4 to the piston chamber A, closes the valve 9, and releases the pressure of the separator 4 from this passage to the atmosphere. released into the
吐出配管７から、セパレータ４への逆流は逆止弁５で防
止している。A check valve 5 prevents backflow from the discharge pipe 7 to the separator 4 .
吐出配管７の圧縮空気が消費され、圧力が下がり、圧力
スイッチ１０の設定値Ｐ３１こ達すると。When the compressed air in the discharge pipe 7 is consumed and the pressure decreases, reaching the set value P31 of the pressure switch 10.
圧力スイッチ１０により３方電磁弁１１はｂ−ｃに切換
えられ、真空弁１２の操作圧力は大気圧となり、真空弁
１２は閉じられ、セパレータ４からピストン室Ａへの圧
力は遮断される。ピストン室Ａは大気圧となり弁９は全
開し、圧縮が再開される。The three-way solenoid valve 11 is switched to b-c by the pressure switch 10, the operating pressure of the vacuum valve 12 becomes atmospheric pressure, the vacuum valve 12 is closed, and the pressure from the separator 4 to the piston chamber A is cut off. The piston chamber A becomes atmospheric pressure, the valve 9 is fully opened, and compression is restarted.
この方法は、圧力スイッチ及び電磁弁を使用しているの
で防爆仕様の場合、通常使用している部品が使用に合わ
ないので、防爆仕様の部品に変更しなければぼらない欠
点がある。This method uses a pressure switch and a solenoid valve, so in the case of explosion-proof specifications, the normally used parts are not suitable for use, so there is a drawback that it is necessary to change to explosion-proof specifications.
又、従来の三方弁の位置に空気作動弁を設ける’ ｆ：
＃ ４： ４よ１．磁弁、□ヨ方。。工えヵ、あ要、
空気作動弁の構造が複雑になる欠点がある。Also, an air-operated valve is installed in place of the conventional three-way valve.
#4: 4 yo 1. Magnetic valve, □ side. . The work, the weight,
The disadvantage is that the structure of the air-operated valve is complicated.
本発明の目的は、圧力の変化を電気的な圧力スイッチに
よらず、空気圧を利用した機械的な２方向空気作動弁に
より、圧縮機の吐出側圧力を大気に放出し動力を下げる
容量制御ができる方法を提供する。The purpose of the present invention is to control the capacity of the compressor by releasing the pressure on the discharge side of the compressor to the atmosphere and reducing the power by using a mechanical two-way air-operated valve that uses air pressure instead of using an electric pressure switch to control pressure changes. Provide a way to do so.
本発明の特徴は、吸入口に設置された弁を操作するため
に必要な空気配管途中に、複数の空気作動弁を設け、こ
の弁のうちの１つは、吐出配管内の圧力を操作圧力源と
し、圧力が基準よりも上昇すると開き、低下すると閉じ
、他方の弁は、圧縮機の吸入圧力を操作圧力源とし、圧
力が基準より低下すると開き、上昇すると閉じるように
したものである。A feature of the present invention is that a plurality of air-operated valves are provided in the air piping necessary to operate the valve installed at the suction port, and one of the valves is configured to adjust the pressure in the discharge piping to the operating pressure. The other valve uses the suction pressure of the compressor as the operating pressure source, and opens when the pressure falls below the standard and closes when it rises.
以下本発明の実施例を第２図により説明する。 Embodiments of the present invention will be described below with reference to FIG.
この実施例で第１図と異なるところは、（１）真空弁１
２はオイルセパレータ４を継ぐ配管 ｉ 、（□上に空
気作動弁２１を設けている。この空気作動弁２１は吐出
配管７の圧力がＰ３になると開くようにバネとピストン
により調整されている。This embodiment differs from FIG. 1 in that (1) vacuum valve 1;
2 is a pipe i connecting to the oil separator 4. An air-operated valve 21 is provided on the pipe i (□). This air-operated valve 21 is adjusted by a spring and a piston so that it opens when the pressure of the discharge pipe 7 reaches P3.
従来から使用されている真空弁１２と類似の構造でこの
空気作動弁を作ることができる。This air-operated valve can be made with a structure similar to the conventionally used vacuum valve 12.
（１１）真空弁１２と圧縮機吸入口を継ぐ配管上の三方
電磁弁１１および圧力スイッチ１０は廃止し□ている。(11) The three-way solenoid valve 11 and pressure switch 10 on the pipe connecting the vacuum valve 12 and the compressor suction port have been eliminated.
（Ｉｌ＋）放気弁２２は電磁弁１３をやめ、本体吸入口
とオイルセパレータ４の圧力差を利用する機械式空気作
動弁２２を使用する。（空気圧制御による放気弁は構造
に差はあるが従来から使用されている）
本実施例では、圧縮機２が運転されると放気弁２２は閉
じ、吐出配管７に圧縮空気が送られ、この圧力が上昇す
る。そして、第３図に示すように圧力がＰ３になると空
気作動弁２１が開き、オイルセパレータ４の圧力は真空
弁１２まで導かれる。For the (Il+) release valve 22, the electromagnetic valve 13 is replaced with a mechanical air-operated valve 22 that utilizes the pressure difference between the main body suction port and the oil separator 4. (Air pressure controlled air release valves have been conventionally used although there are differences in structure.) In this embodiment, when the compressor 2 is operated, the air release valve 22 is closed and compressed air is sent to the discharge pipe 7. , this pressure increases. Then, as shown in FIG. 3, when the pressure reaches P3, the air-operated valve 21 opens, and the pressure in the oil separator 4 is guided to the vacuum valve 12.
更に圧力が上昇し、オイルセパレータ４の圧力がＰ、に
なると、圧力調整弁８が開きはじめ、弁９を徐々に閉じ
始める。これにともない圧縮機吸入口の圧力が下がり、
この圧力が決められた値Ｐ４に下がると真空弁１２が開
き、オイルセパレータ４の圧力は空気作動弁２１．真空
弁１２を通り吸込絞り弁１のピストン室Ａに導びかれ、
弁９を閉じる。この状態でオイルセパレータ４の圧力空
気は、空気作動弁２１．真空弁１２．ピストン室Ａを通
り大気に放出される。When the pressure further increases and the pressure in the oil separator 4 reaches P, the pressure regulating valve 8 begins to open and the valve 9 begins to gradually close. As a result, the pressure at the compressor inlet decreases,
When this pressure falls to a predetermined value P4, the vacuum valve 12 opens, and the pressure in the oil separator 4 is reduced to the air-operated valve 21. is led to the piston chamber A of the suction throttle valve 1 through the vacuum valve 12,
Close valve 9. In this state, the pressure air in the oil separator 4 is supplied to the air-operated valve 21. Vacuum valve 12. It passes through the piston chamber A and is released into the atmosphere.
吐出配管７の圧力が下がりＰ３になると、空気作動弁２
１は閉じピストン室Ａは大気圧にもどり、弁９が開き圧
縮機の吸込みが再開されるとともに。When the pressure in the discharge pipe 7 decreases to P3, the air-operated valve 2
1 closes, the piston chamber A returns to atmospheric pressure, and the valve 9 opens to resume suction from the compressor.
圧縮機吸込口の圧力も大気圧近くに復帰し真空弁１２は
閉じられる。The pressure at the compressor suction port also returns to near atmospheric pressure and the vacuum valve 12 is closed.
以上のように本発明によれば、電気的なスイッチや電磁
弁を一切用いることのない容量調整装置を提供できる。As described above, according to the present invention, it is possible to provide a capacity adjustment device that does not use any electrical switches or solenoid valves.
第１図は従来の容量制御系統のフローシート、第２図は
本発明の一実施例のフローシート、第３図は圧力と弁の
開閉の関係を示す線図である。
１・・・吸入絞り弁、２・・・圧縮機、４・・・オイル
セパレ−タ、５・・・逆止弁、６・・・調圧弁、７・・
・吐出配管、８・・・調整弁、９・・・弁、１ｏ・・・
圧力スイッチ、１１・・・３方弁、１２・・・真空弁、
１３・・・放気弁、Ａ・・・ピストン室、２１・・・空
気作動弁、２２・・・機械式放気弁。
代理人 弁理士 高橋明ネ・′
嘩
蓼１区
第２区
竿３区
！１キ閏FIG. 1 is a flow sheet of a conventional capacity control system, FIG. 2 is a flow sheet of an embodiment of the present invention, and FIG. 3 is a diagram showing the relationship between pressure and valve opening/closing. 1... Suction throttle valve, 2... Compressor, 4... Oil separator, 5... Check valve, 6... Pressure regulating valve, 7...
・Discharge piping, 8...Adjusting valve, 9...Valve, 1o...
Pressure switch, 11...3-way valve, 12...vacuum valve,
13... Air release valve, A... Piston chamber, 21... Air operated valve, 22... Mechanical air release valve. Agent: Patent Attorney Akine Takahashi 1st ward, 2nd ward, 3rd ward! 1 key leap
Claims (1)
て負荷軽減を行うスクリュー圧縮機にお・いて、吸入口
の弁を閉じるために必要な空気配管上に、複数の空気作
動弁を設け、１つは吐出配管内圧力を操作圧とし、圧力
が上昇すると開き圧力が低下すると閉じ、他の１つは圧
縮機吸入口の圧力を操作圧とし、圧力が下がると開き、
圧力が上ると閉じるようにしたごとを特徴とするスクリ
ュー圧縮機の容量調整装置。In a screw compressor that releases the discharge side pressure to the atmosphere and simultaneously closes the suction port valve to reduce the load, multiple air-operated valves are installed on the air piping necessary to close the suction port valve. One has the pressure inside the discharge pipe as the operating pressure, opens when the pressure rises, and closes when the pressure drops, and the other uses the pressure at the compressor inlet as the operating pressure, opens when the pressure drops,
A capacity adjustment device for a screw compressor that is characterized by a device that closes when pressure increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11294684A JPS60256591A (en) | 1984-06-04 | 1984-06-04 | Capacity regulator for screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11294684A JPS60256591A (en) | 1984-06-04 | 1984-06-04 | Capacity regulator for screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60256591A true JPS60256591A (en) | 1985-12-18 |
Family
ID=14599470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11294684A Pending JPS60256591A (en) | 1984-06-04 | 1984-06-04 | Capacity regulator for screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60256591A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT401551B (en) * | 1994-03-30 | 1996-10-25 | Hoerbiger Ventilwerke Ag | DEVICE FOR REDUCING THE PRESSURE OF A COMPRESSOR |
| JP2011038466A (en) * | 2009-08-10 | 2011-02-24 | Hokuetsu Kogyo Co Ltd | Air compressor and its controlling method |
-
1984
- 1984-06-04 JP JP11294684A patent/JPS60256591A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT401551B (en) * | 1994-03-30 | 1996-10-25 | Hoerbiger Ventilwerke Ag | DEVICE FOR REDUCING THE PRESSURE OF A COMPRESSOR |
| JP2011038466A (en) * | 2009-08-10 | 2011-02-24 | Hokuetsu Kogyo Co Ltd | Air compressor and its controlling method |
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