JP2011256765A - Method for preventing start failure upon restarting oil-cooled compressor - Google Patents

Method for preventing start failure upon restarting oil-cooled compressor Download PDF

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JP2011256765A
JP2011256765A JP2010131150A JP2010131150A JP2011256765A JP 2011256765 A JP2011256765 A JP 2011256765A JP 2010131150 A JP2010131150 A JP 2010131150A JP 2010131150 A JP2010131150 A JP 2010131150A JP 2011256765 A JP2011256765 A JP 2011256765A
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compressor
oil
lubricating oil
cooled
restarting
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Nobuyoshi Akatsuka
信義 赤塚
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Mitsui Seiki Kogyo Co Ltd
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Mitsui Seiki Kogyo Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an easy method for preventing start failure upon restarting an oil-cooled compressor, for preventing a temperature increase due to no supply of a lubricating oil while an oil-cooled compressor is stopped, and achieving smooth restarting of the compressor and prevention of deterioration in functions of or damages to the compressor.SOLUTION: One solenoid valve 1a of solenoid valves provided in a system channel of the compressor 2 is operated even when the compressor 2 is stopped to thereby supply an appropriate amount of a lubricating oil to the idling compressor 2.

Description

本発明は、油冷式のコンプレッサの再起動時における潤滑油の不足による起動不良を防止する、簡便な油冷式のコンプレッサの再起動時の起動不良防止方法に関する。   The present invention relates to a simple start-up failure prevention method when restarting an oil-cooled compressor, which prevents start-up failure due to lack of lubricating oil when restarting an oil-cooled compressor.

油冷式のコンプレッサの構成としては、例えば図２に示すものがあり、公知文献としては「特許文献１」が挙げられる。   An example of the configuration of the oil-cooled compressor is shown in FIG. 2, and “Patent Document 1” is given as a known document.

「特許文献１」の「実開平５−６１４９８号」の「油冷式圧縮機」は油冷式のコンプレッサの全体構成を示すものであるが、本発明との構成上の差異をわかり易く比較するために、図２を油冷式コンプレッサの従来技術として説明する。   “Oil-cooled compressor” in “Japanese Utility Model Publication No. 5-61498” in “Patent Document 1” shows the overall configuration of an oil-cooled compressor, but the difference in configuration with the present invention is easily compared. Therefore, FIG. 2 will be described as a prior art of an oil-cooled compressor.

図２において、圧縮機２にはオイルフィルタ３やこれに連通するオイルクーラ４及び電磁弁１及び１ａを介して潤滑油が送油され、潤滑油は圧縮空気と混合した状態でレシーバタンク５に送られ、ここで空気と潤滑油とが分離されて潤滑油は循環して使用される。なお、前記の電磁弁１，１ａは圧縮機２に供給される潤滑油をコントロールするものである。なお、同図中、符号７はオイルセパレータ、８はアフタクーラ、９はドライヤ、１０はエアクリーナを示す。   In FIG. 2, lubricating oil is sent to the compressor 2 via an oil filter 3, an oil cooler 4 communicating therewith, and electromagnetic valves 1 and 1a, and the lubricating oil is mixed with compressed air to the receiver tank 5. The air is separated from the lubricating oil, and the lubricating oil is circulated and used. The solenoid valves 1, 1 a control the lubricating oil supplied to the compressor 2. In the figure, reference numeral 7 is an oil separator, 8 is an aftercooler, 9 is a dryer, and 10 is an air cleaner.

実開平５−６１４９８号（図１）Japanese Utility Model Publication No. 5-61498 (Fig. 1)

圧縮機２内には常に潤滑油が存在しているが、圧縮機２を停止させる時には圧縮機２内に残存している潤滑油を圧縮機２外に排油しないと、再起動時に負荷がかかり円滑な再起動ができなくなる不具合が生ずる。このため、圧縮機２を停止する場合には、圧縮機２を空運転させて圧縮機２内の潤滑油を排油することが行われるが、潤滑油が排油されて圧縮機２内に潤滑油がなくなると、圧縮機２内の温度が上昇し圧縮機２に悪影響を与える不具合が生ずる。   Lubricating oil is always present in the compressor 2, but when the compressor 2 is stopped, if the lubricating oil remaining in the compressor 2 is not drained out of the compressor 2, a load is applied at the time of restart. This causes a problem that smooth restart is not possible. For this reason, when the compressor 2 is stopped, the compressor 2 is idled and the lubricating oil in the compressor 2 is drained. However, the lubricating oil is drained to enter the compressor 2. When the lubricating oil is exhausted, the temperature in the compressor 2 rises, causing a problem that adversely affects the compressor 2.

本発明は、以上の不具合を解消するために発明されたものであり、圧縮機の停止時においても圧縮機内に若干潤滑油を送油して再起動の円滑化を図ることを目的としたものである。   The present invention has been invented to solve the above problems, and aims to facilitate smooth restarting by slightly feeding lubricating oil into the compressor even when the compressor is stopped. It is.

本発明は、以上の目的を達成するために発明されたものであり、請求項１の発明は、油冷式コンプレッサの再起動時における起動不良を防止する方法であって、
該方法は、圧縮機の停止時において圧縮機本体への潤滑油の送入停止を行う際に、潤滑油系路に配置されている電磁弁を瞬時に閉時しないで閉時時間を遅延することを特徴とする。 The present invention has been invented to achieve the above object, and the invention of claim 1 is a method for preventing a starting failure when restarting an oil-cooled compressor,
The method delays the closing time without instantaneously closing the solenoid valve arranged in the lubricating oil system when stopping the feeding of the lubricating oil to the compressor body when the compressor is stopped. It is characterized by that.

また、請求項２の発明は、前記電磁弁は、複数個配設されている電磁弁の内の１つのものであることを特徴とする。   The invention according to claim 2 is characterized in that the electromagnetic valve is one of a plurality of electromagnetic valves.

本発明の請求項１の油冷式のコンプレッサの再起動時の起動不良防止方法によれば、圧縮機の停止時において一部の電磁弁を作動させ、圧縮機の空運転時にも若干の潤滑油を供給することが出来る。そのため圧縮機内の温度の上昇を防ぐ事ができると共に円滑な再起動が可能となる効果を上げることが出来る。   According to the start-up failure prevention method of the oil-cooled compressor according to claim 1 of the present invention, some solenoid valves are operated when the compressor is stopped, and some lubrication is performed even when the compressor is idling. Oil can be supplied. Therefore, it is possible to prevent an increase in the temperature in the compressor and increase the effect of enabling a smooth restart.

また、本発明の請求項２の油冷式のコンプレッサの再起動時の起動不良防止方法によれば、圧縮機に少量の潤滑油を供給するには系路内における電磁弁の１つを作動させればよく圧縮機内に適量の潤滑油を送ることができ、潤滑油の過状の送油を防止することが確実に行われる。   According to the method for preventing start-up failure when restarting the oil-cooled compressor according to claim 2 of the present invention, one of the solenoid valves in the system is operated to supply a small amount of lubricating oil to the compressor. It is sufficient to feed an appropriate amount of lubricating oil into the compressor, and it is possible to reliably prevent excessive lubrication of the lubricating oil.

本発明における圧縮機の系路と電磁弁のコントロール機構を示す構成図。The block diagram which shows the system of the compressor in this invention, and the control mechanism of a solenoid valve. 従来の油冷式コンプレッサの系路を示す構成図。The block diagram which shows the system path of the conventional oil-cooled compressor.

以下、本発明の油冷式のコンプレッサの再起動時の起動不良防止方法の実施の形態を、図面を参照して詳述する。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a starting failure prevention method at the time of restarting an oil-cooled compressor according to the present invention will be described below in detail with reference to the drawings.

まず、図１により本発明の実施形態に係る油冷式のコンプレッサの系路の内容を説明する。
なお、これに先立ち、本実施形態の油冷式のコンプレッサの全体構成を説明すると、圧縮機２と、レシーバタンク５と、オイルフィルタ３と、オイルクーラ４と、電磁弁１，１ａと、この電磁弁１，１ａを制御する制御装置６と、オイルセパレータ７と、アフタクーラ８と、ドライヤ９と、を備えている。 First, the content of the system path of the oil-cooled compressor according to the embodiment of the present invention will be described with reference to FIG.
Prior to this, the overall configuration of the oil-cooled compressor of the present embodiment will be described. The compressor 2, the receiver tank 5, the oil filter 3, the oil cooler 4, the electromagnetic valves 1 and 1a, A control device 6 that controls the electromagnetic valves 1 and 1a, an oil separator 7, an aftercooler 8, and a dryer 9 are provided.

圧縮機２で圧縮された空気（潤滑油を含む）はレシーバタンク５に送られ、ここで油気分離され、潤滑油はオイルフィルタ３で濾過され、オイルクーラ４で冷却され、電磁弁１，１ａを介して再び圧縮機２に戻油される。一方、レシーバタンク５で潤滑油と分離された圧縮空気は、オイルセパレータ７を介してアフタクーラ８に送られ、ドライヤ９を介して使用側に送られる。なお、圧縮機２への空気の供給はエアクリーナ１０を介して供給される。   Air (including lubricating oil) compressed by the compressor 2 is sent to a receiver tank 5 where oil and gas are separated, and the lubricating oil is filtered by an oil filter 3 and cooled by an oil cooler 4. Oil is returned to the compressor 2 again via 1a. On the other hand, the compressed air separated from the lubricating oil in the receiver tank 5 is sent to the aftercooler 8 via the oil separator 7 and sent to the use side via the dryer 9. Note that air is supplied to the compressor 2 via an air cleaner 10.

圧縮機２が停止すると、従来では電磁弁１，１ａも制御装置６の作動により閉止され、圧縮機２への潤滑油の供給が停止する。しかしながら、この状態のままでは圧縮機２の内部温度が上昇する。圧縮機２は停止の命令を受けても残存している潤滑油を排出するためにある時間だけ空廻りするが、仮りに潤滑油の供給が全く停止すると前記のように圧縮機２の内部の温度が上昇し、圧縮機２の機能の低下や圧縮機２が損傷を被る不具合が生ずる。   When the compressor 2 is stopped, the solenoid valves 1 and 1a are conventionally closed by the operation of the control device 6, and the supply of the lubricating oil to the compressor 2 is stopped. However, in this state, the internal temperature of the compressor 2 increases. Even if the compressor 2 receives a stop command, the compressor 2 runs idle for a certain period of time in order to discharge the remaining lubricant, but if the supply of lubricant is completely stopped, The temperature rises, causing a problem that the function of the compressor 2 is deteriorated and the compressor 2 is damaged.

そこで本発明では、制御装置６に電磁弁１及び１ａの内の１つの電磁弁１ａが圧縮機２の停止命令がでても作動するような制御機能をもたせている。この機能により、圧縮機２が空運転している間も電磁弁１ａがある時間だけ動作し、潤滑油が圧縮機２に供給される。なお、圧縮機２の系路には複数の電磁弁があるが、圧縮機２の停止時においては１つだけ電磁弁１ａを開放すればよく、ほかの電磁弁１等は閉止され、余分の潤滑油の圧縮機２側への供給が停止される。なお、電磁弁１ａの開度と開放時間については特別な値がなく、圧縮機２の形式や大きさに対応して決められる。   Therefore, in the present invention, the control device 6 is provided with a control function such that one of the electromagnetic valves 1 and 1a can be operated even when a command to stop the compressor 2 is issued. With this function, the solenoid valve 1a operates for a certain period of time while the compressor 2 is idling, and lubricating oil is supplied to the compressor 2. The compressor 2 has a plurality of solenoid valves. When the compressor 2 is stopped, only one solenoid valve 1a needs to be opened. Supply of the lubricating oil to the compressor 2 side is stopped. In addition, there is no special value about the opening degree and opening time of the solenoid valve 1a, and it is determined according to the type and size of the compressor 2.

本発明は、以上の内容のものからなるが、この内容に限定するものではなく、同一技術的範疇のものが適用されることは勿論である。   The present invention is composed of the contents described above, but is not limited to the contents, and those of the same technical category are of course applied.

本発明は、油冷式の圧縮機に適用されるものであり、その形式や大きさに無関係に適用可能であり、その利用範囲は広い。   The present invention is applied to an oil-cooled compressor, can be applied regardless of its type and size, and has a wide range of uses.

１ 電磁弁
１ａ 電磁弁
２ 圧縮機
３ オイルフィルタ
４ オイルクーラ
５ レシーバタンク
６ 制御装置
７ オイルセパレータ
８ アフタクーラ
９ ドライヤ
１０ エアクリーナ DESCRIPTION OF SYMBOLS 1 Solenoid valve 1a Solenoid valve 2 Compressor 3 Oil filter 4 Oil cooler 5 Receiver tank 6 Control device 7 Oil separator 8 After cooler 9 Dryer 10 Air cleaner

Claims (2)

油冷式コンプレッサの再起動時における起動不良を防止する方法であって、
該方法は、圧縮機の停止時において圧縮機本体への潤滑油の送入停止を行う際に、潤滑油系路に配置されている電磁弁を瞬時に閉時しないで閉時時間を遅延する
ことを特徴とする油冷式のコンプレッサの再起動時の起動不良防止方法。 A method for preventing a start-up failure when restarting an oil-cooled compressor,
The method delays the closing time without instantaneously closing the solenoid valve arranged in the lubricating oil system when stopping the feeding of the lubricating oil to the compressor body when the compressor is stopped. A method for preventing start-up failure when restarting an oil-cooled compressor. 前記電磁弁は、複数個配設されている電磁弁の内の１つのものである
ことを特徴とする請求項１に記載の油冷式のコンプレッサの再起動時の起動不良防止方法。 The method according to claim 1, wherein the electromagnetic valve is one of a plurality of electromagnetic valves.
JP2010131150A 2010-06-08 2010-06-08 Method for preventing start failure upon restarting oil-cooled compressor Pending JP2011256765A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404258A (en) * 2018-11-16 2019-03-01 沈阳鼓风机集团压力容器有限公司 A kind of lubricating oil system for compressor set

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5557691A (en) * 1978-10-26 1980-04-28 Iwata Tosouki Kogyo Kk Driving method of oil cooling rotary compressor
JPS60194188U (en) * 1984-06-04 1985-12-24 株式会社神戸製鋼所 Screw type compressor
JPS63106394A (en) * 1986-10-24 1988-05-11 Hitachi Ltd Starting load reducing device for screw compressor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5557691A (en) * 1978-10-26 1980-04-28 Iwata Tosouki Kogyo Kk Driving method of oil cooling rotary compressor
JPS60194188U (en) * 1984-06-04 1985-12-24 株式会社神戸製鋼所 Screw type compressor
JPS63106394A (en) * 1986-10-24 1988-05-11 Hitachi Ltd Starting load reducing device for screw compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404258A (en) * 2018-11-16 2019-03-01 沈阳鼓风机集团压力容器有限公司 A kind of lubricating oil system for compressor set

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