JPH052838B2 - - Google Patents
Info
- Publication number
- JPH052838B2 JPH052838B2 JP60201515A JP20151585A JPH052838B2 JP H052838 B2 JPH052838 B2 JP H052838B2 JP 60201515 A JP60201515 A JP 60201515A JP 20151585 A JP20151585 A JP 20151585A JP H052838 B2 JPH052838 B2 JP H052838B2
- Authority
- JP
- Japan
- Prior art keywords
- cooler
- gas
- valve
- compressor
- cooling
- 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 - Lifetime
Links
- 238000001816 cooling Methods 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 36
- 239000000498 cooling water Substances 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、圧縮室に油を供給しないオイルフリ
ースクリユー圧縮機、特に一段圧縮でガス利用側
の要求に適合した圧力まで昇圧する単段オイルフ
リースクリユー圧縮機に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an oil-free screw compressor that does not supply oil to the compression chamber, particularly a single-stage compressor that increases the pressure to a pressure that meets the requirements of the gas user through single-stage compression. This invention relates to an oil-free screw compressor.
従来のオイルフリースクリユー圧縮機は、吸入
ガスを低圧段圧縮機本体により、ガス利用側の要
求する圧力（例えば７Kg／cm2Ｇ）の中間圧力程度
まで昇圧し、このガスを中間クーラにより冷却し
て圧縮熱を除去したのち、高圧断圧縮機本体によ
りガス利用側の要求する圧力（例えば７Kg／cm2
Ｇ）まで昇圧し、これを逆止弁を通貨させたのち
アフタークーラによりガス利用側の要求に適合し
た温度まで冷却してガス利用側に供給している。
一方、圧縮機本体が無負荷になつたときには、圧
縮機本体と逆止弁との間の吐出配管中のガスを、
放風弁を解放して放風クーラによつて冷却したの
ち、放風配管を経由して大気へ放出している。な
お、この種のものとしては、例えば、特公昭46−
5093号公報に開示されたものがある。
Conventional oil-free screw compressors use the low-pressure compressor main body to boost the intake gas to an intermediate pressure of the pressure required by the gas user (for example, 7 kg/cm 2 G), and then cool this gas using an intermediate cooler. After removing the heat of compression, the pressure required by the gas user (e.g. 7Kg/cm 2
After the pressure is increased to G) and the check valve is turned off, the gas is cooled by an aftercooler to a temperature that meets the requirements of the gas user and is then supplied to the gas user.
On the other hand, when the compressor body is under no load, the gas in the discharge pipe between the compressor body and the check valve is
After the air discharge valve is opened and the air is cooled by a blow-off cooler, it is released into the atmosphere via a blow-off pipe. In addition, examples of this type include, for example,
There is one disclosed in Publication No. 5093.
上記の従来技術においては、放風クーラは放風
弁の出口に連結されているので、放風弁は、スク
リユー圧縮機本体から吐出される高温のガスと常
に接した状態で開閉動作を繰り返すため、放風弁
のシート面が摩滅し、放風弁の閉止状態を安定し
て接続できなくなる。また、従来技術において
は、各クーラが別々に設置されている。このた
め、冷却水及びガスのための配管が複雑となる。
また、放風クーラは圧縮機本体の無負荷運転時は
ガスが送り込まれるが、負荷運転時はガスが送り
込まれないために過剰冷却となり、ドレンが発生
する。このドレン発生を防止するため、負荷運転
時は放風クーラの冷却水の供給を停止することが
必要となり、操作も面倒となる。
In the above-mentioned conventional technology, since the blow-off cooler is connected to the outlet of the blow-off valve, the blow-off valve repeatedly opens and closes while being in constant contact with the high-temperature gas discharged from the screw compressor main body. , the seat surface of the air blower valve is worn out, making it impossible to stably connect the air blower valve in its closed state. Furthermore, in the prior art, each cooler is installed separately. Therefore, piping for cooling water and gas becomes complicated.
In addition, gas is sent to the air blowing cooler when the compressor main body is operating under no load, but no gas is sent during load operation, resulting in excessive cooling and drainage. In order to prevent this drain from occurring, it is necessary to stop the supply of cooling water to the ventilation cooler during load operation, which also makes the operation cumbersome.
本発明の目的は、放風弁を熱から保護して、弁
としての信頼性を向上することにある。また、本
発明の他の目的は、吐出ガス及び放風ガスの冷却
系の構成と操作を簡単にすることにある。 An object of the present invention is to protect a blowoff valve from heat and improve its reliability as a valve. Another object of the present invention is to simplify the configuration and operation of a cooling system for discharge gas and blast gas.
上記の第１の目的は、圧縮機本体から吐出され
る吐出ガスを予冷却する予冷却用クーラの出口側
に、放風ガスを冷却する放風クーラを連結し、こ
の放風クーラの出口に放風弁を連結することによ
り達成される。また、上記の第２の目的は、放風
クーラを構成する伝熱管を予冷却用クーラを構成
する伝熱管の出口側から分岐し、これら放風クー
ラを構成する伝熱管と予冷却用クーラを構成する
伝熱管を同一のシエル内に配設ることにより達成
される。
The first purpose of the above is to connect a blow-off cooler that cools the blow-off gas to the outlet side of the pre-cooling cooler that pre-cools the discharge gas discharged from the compressor main body, and to This is achieved by connecting a blow-off valve. The second purpose is to branch the heat exchanger tubes constituting the blast cooler from the outlet side of the heat exchange tubes constituting the precooling cooler, and to separate the heat exchanger tubes constituting the blast cooler and the precooling cooler. This is achieved by arranging the constituent heat transfer tubes in the same shell.
圧縮機本体の無負荷運転時、放出ガスは放風ク
ーラを構成する伝熱管だけでなく予冷却用クーラ
を構成する伝熱管にも流れて冷却され、その後放
風弁を通つて大量に放出される。このため放風弁
は高温の吐出ガスに接することがない。さらに、
放風クーラのシエルと予冷却用クーラのシエルが
共用になつており、負荷運転時、無負荷運転時と
も予冷却用クーラの伝熱管にはガスが通つてお
り、これを冷す必要があるので、シエル内に流す
冷却液を無負荷運転時停止しなくても冷却過剰と
なる恐れはなく、冷却液の停止等の操作が不要と
なる。
During no-load operation of the compressor main body, the released gas flows not only through the heat transfer tubes that make up the air cooler but also the heat transfer tubes that make up the pre-cooling cooler and is cooled, and then is released in large quantities through the air release valve. Ru. Therefore, the blow-off valve does not come into contact with high-temperature discharge gas. moreover,
The shell of the ventilation cooler and the shell of the pre-cooling cooler are shared, and gas passes through the heat transfer tube of the pre-cooling cooler both during load and no-load operation, and it is necessary to cool this. Therefore, there is no risk of excessive cooling even if the coolant flowing into the shell is not stopped during no-load operation, and operations such as stopping the coolant are not required.
以下この発明の一実施例を図により説明する。
一段圧縮でガス利用側の要求に適用した圧力まで
昇圧する単段オイルフリースクリユー圧縮機本体
１は、その吐出側に吐出配管２が結合されてい
る。この吐出配管２には、この例では鋼製の直管
からなる伝熱管３ａ、この伝熱管３ａを包囲する
シエル５とからなる予冷却用クーラ（以下プレク
ーラという）３が設置されている。シエル５は、
冷却水の入口５ａ、出口５ｂを消し、その内部に
は、伝熱管４ａが設置され、プレクーラ３と共通
のシエル５と伝熱管４ａとによつて放風クーラ４
を構成している。この放風クーラ４の伝熱管４ａ
の入口は、プレクーラ３の出口すなち伝熱管３ａ
の出口から分岐されている。プレクーラ３を構成
する伝熱管３ａの出口には、逆止弁６が連結され
ている。この逆止弁６の出口側にはアフタークー
ラ７が連結されている。放風クーラ４の伝熱管４
ａの出口には、放風配管８、放風弁９が、放風配
管８、放風弁９の順に連結されている。
An embodiment of the present invention will be described below with reference to the drawings.
A single-stage oil-free screw compressor main body 1 that increases the pressure to a pressure that meets the requirements of a gas user through single-stage compression has a discharge pipe 2 connected to its discharge side. In this discharge pipe 2, a pre-cooling cooler (hereinafter referred to as pre-cooler) 3 is installed, which in this example includes a heat transfer tube 3a made of a straight steel tube and a shell 5 surrounding the heat transfer tube 3a. Ciel 5 is
The cooling water inlet 5a and outlet 5b are turned off, and a heat exchanger tube 4a is installed inside thereof, and the air discharge cooler 4 is connected to the precooler 3 by the common shell 5 and the heat exchanger tube 4a.
It consists of Heat exchanger tube 4a of this air cooler 4
The inlet is the outlet of the precooler 3, that is, the heat exchanger tube 3a.
branched off from the exit. A check valve 6 is connected to the outlet of the heat transfer tube 3a that constitutes the precooler 3. An aftercooler 7 is connected to the outlet side of the check valve 6. Heat exchanger tube 4 of air cooler 4
An air discharge pipe 8 and an air discharge valve 9 are connected to the outlet of a in this order.
次に動作を説明する。 Next, the operation will be explained.
圧縮機本体１が全負荷で運転しているときは、
圧縮機本体１によつてガスが所定の最終圧力まで
昇圧され、200〜350℃の高温となる。このガス
は、プレクーラ３の伝熱管３ａ内を通り、シエル
５内を流れる冷却水と熱交換し、逆止弁６が正常
な動作を持続できる程度の温度（100〜250℃）ま
で冷却される。プレクーラ３で冷却されたガス
は、逆止弁６を通過してアフタークーラ７に入
り、ここで所望の温度まで冷却され、ガス中の水
分が除去されて使用個所に送られる。 When the compressor body 1 is operating at full load,
The gas is pressurized to a predetermined final pressure by the compressor main body 1, and is heated to a high temperature of 200 to 350°C. This gas passes through the heat transfer tube 3a of the precooler 3, exchanges heat with the cooling water flowing in the shell 5, and is cooled to a temperature (100 to 250°C) that allows the check valve 6 to maintain normal operation. . The gas cooled by the precooler 3 passes through the check valve 6 and enters the aftercooler 7, where it is cooled to a desired temperature, moisture in the gas is removed, and the gas is sent to the point of use.
圧縮機本体１が無負荷で運転しているときは、
圧縮機本体１の吸入側に配置された吸気閉塞弁
（図示せず）を全閉とし、かつ放風弁９を全開と
して圧縮機本体１の吐出口から逆止弁６までの間
のガスを放風クーラ４の伝熱管４ａ内を通過させ
てこれを冷却し、その後放風配管８を介して放風
弁９から大気中に放出する。圧縮機本体１の吐出
口から逆止弁６までの間のガスが放出されること
により、圧縮機本体１の吐出側の圧力（背圧）が
大気圧まで下がり、消費動力が軽減される。 When the compressor main body 1 is operating without load,
The intake blockage valve (not shown) disposed on the suction side of the compressor body 1 is fully closed, and the blow-off valve 9 is fully opened to drain the gas between the discharge port of the compressor body 1 and the check valve 6. It is cooled by passing through the heat exchanger tube 4a of the air cooler 4, and then discharged into the atmosphere from the air blower valve 9 via the air blower piping 8. By releasing the gas between the discharge port of the compressor body 1 and the check valve 6, the pressure (back pressure) on the discharge side of the compressor body 1 is reduced to atmospheric pressure, and power consumption is reduced.
圧縮機本体１の吐出口から吐出されたガスは、
無負荷運転時もかなりの高温となるが、このガス
をプレクーラ３で予冷却し、さらに放風クーラ４
で冷却した後に放風弁９に導いているので、ガス
が放風弁９に達するころには、このガスを大気中
に放出してもなんら支障がなくしかも放風弁９の
開閉動作に悪影響を及ぼさない温度になつてい
る。そのため放風弁９は、閉じている状態のとき
に高温にさらされることがなくななり、高温によ
るシート面の摩滅が減少して弁体のシート面への
密着性が保たれ閉止状態を安定して持続できる。 The gas discharged from the discharge port of the compressor main body 1 is
Although the temperature is quite high even during no-load operation, this gas is pre-cooled in pre-cooler 3, and then cooled in air-discharge cooler 4.
Since the gas is cooled by the air vent valve 9 and then guided to the vent valve 9, by the time the gas reaches the vent valve 9, there is no problem in releasing this gas into the atmosphere, and there is no adverse effect on the opening/closing operation of the vent valve 9. The temperature has reached a point where it does not affect the temperature. Therefore, the air discharge valve 9 is not exposed to high temperatures when in the closed state, and wear and tear on the seat surface due to high temperatures is reduced, and the adhesion of the valve element to the seat surface is maintained, stabilizing the closed state. can be sustained.
以上説明したように、本発明によれば次の効果
がある。
As explained above, the present invention has the following effects.
(1) 無負荷運転時、放風弁を通過して大気中に放
出されるガスをプレクーラで予冷し、さらに放
風クーラで冷却しているので、放風弁を通過す
るときのガス温度を充分に低くでき、放風弁は
閉じている状態のときに高温にさらされること
がなくなり、弁を熱から保護し、信頼性を向上
することできる。(1) During no-load operation, the gas passing through the ventilation valve and being released into the atmosphere is pre-cooled in a pre-cooler and then further cooled in the ventilation cooler, so the temperature of the gas when it passes through the ventilation valve is It can be made sufficiently low so that the blow-off valve is not exposed to high temperatures when in the closed state, which protects the valve from heat and improves reliability.
(2) プレクーラおよび放風クーラのシエルが共通
になつているので、部品数が少なく、コンパク
トにできるとともに、冷却水配管が一系統でよ
い。(2) Since the shell of the pre-cooler and the air blowing cooler is common, the number of parts is small, making it compact and requiring only one system of cooling water piping.
(3) 放風弁は、圧縮機の吸入ガス量を調節するた
めの吸気閉塞弁と連結されていることが多く、
このような場合には、放風ガスの熱による悪影
響が容量調節装置へ及ぶことがなくなる。(3) The blowoff valve is often connected to an intake blockage valve to adjust the amount of gas taken into the compressor.
In such a case, the capacity adjustment device will not be adversely affected by the heat of the blast gas.
図は、この発明の一実施例の説明図である。
１……単段オイルフリースクリユー圧縮機本
体、２……吐出配管、３……プレクーラ、３ａ…
…プレクーラ３の伝熱管、４……放風クーラ、４
ａ……放風クーラ４の伝熱管、５……シエル、６
……逆止弁、７……アフタークーラ、８……放風
配管、９……放風弁。
The figure is an explanatory diagram of an embodiment of the present invention. 1...Single-stage oil-free screw compressor main body, 2...Discharge piping, 3...Precooler, 3a...
...Heat transfer tube of pre-cooler 3, 4...Blowout cooler, 4
a... Heat exchanger tube of air cooler 4, 5... Ciel, 6
... Check valve, 7 ... Aftercooler, 8 ... Air discharge piping, 9 ... Air discharge valve.
Claims (1)
リユー圧縮機本体と、この圧縮機本体の吐出側に
接続された逆止弁と、前記圧縮機本体と逆止弁間
のガスを大気に放出するための放風弁と、大気に
放出されるガスを冷却するための放風クーラを有
するものにおいて、前記圧縮機本体の吐出口と逆
止弁との間に吐出ガスを予冷却する予冷却用クー
ラを設置し、この予冷却用クーラの出口側に前記
放風クーラを設置し、この放風クーラの出口に前
記放風弁を連絡したことを特徴とするオイルフリ
ースクリユー圧縮機。 ２ 圧縮機室内に油を供給しないオイルフリース
クリユー圧縮機本体と、この圧縮機本体の吐出側
に接続された逆止弁と、前記圧縮機本体と逆止弁
間のガスを大気に放出するための放風弁と、大気
に放出されるガスを冷却する放風クーラを有する
ものにおいて、前記圧縮機本体と逆止弁との間
に、吐出ガスを予冷却する予冷却用クーラを構成
する伝熱管を設置し、この伝熱管の出口側から前
記放風クーラを構成する伝熱管を分岐し、この伝
熱管の出口側に前記放風弁を連結し、前記予冷却
用クーラを構成する伝熱管と放風クーラを構成す
る伝熱管を同一シエル内に配設したことを特徴と
するオイルフリースクリユー圧縮機。[Claims] 1. An oil-free screw compressor body that does not supply oil into the compression chamber, a check valve connected to the discharge side of the compressor body, and a gas flow between the compressor body and the check valve. The compressor has a blow-off valve for discharging the gas into the atmosphere and a blow-off cooler for cooling the gas discharged into the atmosphere. An oil-free screwdriver characterized in that a pre-cooling cooler for cooling is installed, the air blowing cooler is installed on the outlet side of the pre-cooling cooler, and the air blowing valve is connected to the outlet of the air blowing cooler. compressor. 2. An oil-free screw compressor body that does not supply oil into the compressor chamber, a check valve connected to the discharge side of the compressor body, and a gas between the compressor body and the check valve that releases the gas to the atmosphere. A pre-cooling cooler for pre-cooling the discharged gas is configured between the compressor main body and the check valve in the compressor having a blow-off valve for cooling the discharged gas and a blow-off cooler for cooling the gas discharged into the atmosphere. A heat transfer tube is installed, the heat transfer tube constituting the air cooler is branched from the outlet side of the heat transfer tube, and the air blowing valve is connected to the outlet side of the heat transfer tube, and the heat transfer tube forming the precooling cooler is connected. An oil-free screw compressor characterized in that a heat tube and a heat transfer tube constituting an air cooler are arranged in the same shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20151585A JPS6187995A (en) | 1985-09-13 | 1985-09-13 | Oil free screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20151585A JPS6187995A (en) | 1985-09-13 | 1985-09-13 | Oil free screw compressor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19151284A Division JPS6085286A (en) | 1984-09-14 | 1984-09-14 | Oil-free screw compressor |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7082858A Division JP2721132B2 (en) | 1995-04-07 | 1995-04-07 | Oil-free screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6187995A JPS6187995A (en) | 1986-05-06 |
| JPH052838B2 true JPH052838B2 (en) | 1993-01-13 |
Family
ID=16442322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20151585A Granted JPS6187995A (en) | 1985-09-13 | 1985-09-13 | Oil free screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6187995A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2721132B2 (en) * | 1995-04-07 | 1998-03-04 | 株式会社日立製作所 | Oil-free screw compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5056610A (en) * | 1973-09-21 | 1975-05-17 | ||
| JPS5468510A (en) * | 1977-11-11 | 1979-06-01 | Kobe Steel Ltd | Gas leak preventive method for self-lubricating screw compressor |
| JPS5640055A (en) * | 1979-09-10 | 1981-04-16 | Hitachi Ltd | Air cooling heat pump type rerigerating system |
| JPS56143392A (en) * | 1980-04-09 | 1981-11-09 | Hitachi Ltd | Device for monitoring screw compressor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5361762U (en) * | 1976-10-27 | 1978-05-25 | ||
| JPS54126203U (en) * | 1978-02-23 | 1979-09-03 |
-
1985
- 1985-09-13 JP JP20151585A patent/JPS6187995A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5056610A (en) * | 1973-09-21 | 1975-05-17 | ||
| JPS5468510A (en) * | 1977-11-11 | 1979-06-01 | Kobe Steel Ltd | Gas leak preventive method for self-lubricating screw compressor |
| JPS5640055A (en) * | 1979-09-10 | 1981-04-16 | Hitachi Ltd | Air cooling heat pump type rerigerating system |
| JPS56143392A (en) * | 1980-04-09 | 1981-11-09 | Hitachi Ltd | Device for monitoring screw compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6187995A (en) | 1986-05-06 |
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