JPH0255884A - Multistage reciprocating compressor - Google Patents

Multistage reciprocating compressor

Info

Publication number
JPH0255884A
JPH0255884A JP20599888A JP20599888A JPH0255884A JP H0255884 A JPH0255884 A JP H0255884A JP 20599888 A JP20599888 A JP 20599888A JP 20599888 A JP20599888 A JP 20599888A JP H0255884 A JPH0255884 A JP H0255884A
Authority
JP
Japan
Prior art keywords
pressure side
unloader
low
compression section
pressure
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
Application number
JP20599888A
Other languages
Japanese (ja)
Other versions
JP2648938B2 (en
Inventor
Susumu Sakamoto
晋 坂本
Hiroshi Mihashi
博 三橋
Gen Kano
玄 加納
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokico Ltd
Original Assignee
Tokico Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokico Ltd filed Critical Tokico Ltd
Priority to JP20599888A priority Critical patent/JP2648938B2/en
Publication of JPH0255884A publication Critical patent/JPH0255884A/en
Application granted granted Critical
Publication of JP2648938B2 publication Critical patent/JP2648938B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To prevent any vibration in an unloader part at the high pressure side from occurring by making actuation timing of an unloader at the low pressure side later than that of the unloader at the high pressure side. CONSTITUTION:A discharge chamber of a cylinder head 7 at the low pressure side and a suction chamber 10 of a cylinder head 8 at the high pressure side are connected to each other via an intermediate pipe 13. Each of unloaders 18, 18' with an unload piston is installed in respective suction chambers 9, 10 at both low and high pressure sides. Compressed gas fed to a pipeline A is taken in the unloader 18 at the low pressure side at once, but another compressed gas fed to a pipeline B is taken in the unloader 18' via a delay means 24, so that it opens a suction valve at timing later than that of the unloader 18 at the low pressure side.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、駆動源の動力負荷を軽減させるアンロード機
構を有した多段往復動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 a multi-stage reciprocating compressor having an unloading mechanism that reduces the power load on a drive source.

(従来の技術) 機械の動力源として用いられる圧縮エアやその他の圧縮
気体は、近年益々高圧のものが要求される傾向にある。
(Prior Art) In recent years, compressed air and other compressed gases used as power sources for machines are increasingly required to be at higher pressures.

これに対処するため、従来では、第3図および第4図に
示すような多段往復動圧縮機か多く用いられている。
To cope with this problem, conventionally, multi-stage reciprocating compressors as shown in FIGS. 3 and 4 have been widely used.

この多段往復動圧ll1li機は、クランクケースlに
低圧側圧縮部の第一のクランク2と高圧側圧縮部の第二
のシリンダ3か連設されている。第一のシリンダ2と第
二のシリンダ3に夫々内装されたピストン4はコンロッ
ド5を介してクランク軸6に連結され、各シリンダヘッ
ド7.8には吸入室9、lOと吐出室11.12か設け
られている。そして、低圧側の吐出室11と高圧側の吸
入室IOは中間パイプ13で連結されている。したがっ
て、フィルタ14を介して低圧側の吸入室9から吸入さ
れた気体は第一のシリンダ2で中間圧に圧縮され、その
後吐出室11から中間パイプ13を通って高圧側の吸入
室IOに送られ、第二のシリンダ3でさらに高圧に圧縮
されてタンク15に貯留される。また、低圧側と高圧側
の各吸入室9.10には、吸入弁16.17を適宜開放
状態するためのアンローダ18.18°か装着されてい
る。このアンロータ18.18°は、圧縮機の動力負荷
を軽減させるためのものであり、第4図に示すように先
端部を吸入弁16.17に臨ませたアンロードピストン
19かスプリンタ20によって常時上方に弾発付勢され
、アンロードピストン19の上方に圧縮気体の導入配管
21か取付けられている。そして、タンク15の圧力か
所定値に達した際には、導入配管21に圧縮気体を導入
してアンロードピストン19をスプリンタ20の力に抗
して押し下げ、吸入弁16.17を開く。尚、第4図中
符号22は弁座板で、この弁座板22には長楕円形の吸
入孔か1没けられており、その孔の長手方向の中央付近
には、アンロードピストン19の先端19aに両側から
臨ませるようにしてストッパとしての突起23か形成さ
れている。この突起23は、アンロードピストン19の
段部19bに当接することて先端+9aの突出I−を規
制する。
In this multi-stage reciprocating dynamic pressure ll1li machine, a first crank 2 of a low-pressure side compression section and a second cylinder 3 of a high-pressure side compression section are connected to a crankcase l. Pistons 4 housed in the first cylinder 2 and the second cylinder 3 are connected to a crankshaft 6 via a connecting rod 5, and each cylinder head 7.8 has a suction chamber 9, a lO and a discharge chamber 11.12. Or is provided. The discharge chamber 11 on the low pressure side and the suction chamber IO on the high pressure side are connected by an intermediate pipe 13. Therefore, the gas sucked from the low-pressure side suction chamber 9 via the filter 14 is compressed to intermediate pressure in the first cylinder 2, and then sent from the discharge chamber 11 through the intermediate pipe 13 to the high-pressure side suction chamber IO. It is further compressed to a high pressure in the second cylinder 3 and stored in the tank 15. Further, each suction chamber 9.10 on the low pressure side and the high pressure side is equipped with an unloader 18.18° for appropriately opening the suction valve 16.17. This unrotor 18.18° is intended to reduce the power load on the compressor, and as shown in FIG. A compressed gas introduction pipe 21 is attached above the unloading piston 19, which is always elastically biased upward. When the pressure in the tank 15 reaches a predetermined value, compressed gas is introduced into the introduction pipe 21, the unload piston 19 is pushed down against the force of the splinter 20, and the suction valves 16 and 17 are opened. In addition, the reference numeral 22 in FIG. 4 is a valve seat plate, and an oblong suction hole is sunk into this valve seat plate 22, and an unload piston 19 is located near the center of the hole in the longitudinal direction. A protrusion 23 serving as a stopper is formed so as to face the tip 19a from both sides. This protrusion 23 comes into contact with the stepped portion 19b of the unloading piston 19 to restrict the protrusion I- of the tip +9a.

(発明か解決しようとする課題) しかしなから、上述した従来の多段往復動圧縮機におい
ては、低圧側圧縮部と高圧側圧縮部の各アンロータ18
.18’の導入配管21か同一の圧力源に接続されてい
るため、高圧側と低圧側のアンロードピストン19の作
動がほぼ同時に起こる。このため、低圧側の第一のシリ
ンダ2には低圧(エアの場合には大気圧)か導入される
か、高圧側の第二のシリンダ3には中間パイプ13と吸
入室10の内部の中間圧が残留することになる。ここて
、アンロータ18.18°か作動する間、低圧側と高圧
側のピストン4は相変わらず運転を続けるため、圧力か
高く比重量の大きい気体を充填した第二のシリンダ3に
おいては、吸入弁17かその内部の圧力変動の影響を大
きく受けるようになる。その結果として、第二のシリン
ダ3の圧力上昇時に吸入弁17か瞬間的にL方に押し上
げられ、ピストン4の上下動に伴って、アンロードピス
トン19か小刻みに上下動を繰り返す、いわゆるチャタ
リンクを生しることかあった。
(Problem to be solved by the invention) However, in the conventional multistage reciprocating compressor described above, each unrotor 18 of the low pressure side compression section and the high pressure side compression section
.. Since the introduction pipe 21 of 18' is connected to the same pressure source, the unload pistons 19 on the high pressure side and the low pressure side operate almost simultaneously. For this reason, either low pressure (atmospheric pressure in the case of air) is introduced into the first cylinder 2 on the low pressure side, or the second cylinder 3 on the high pressure side is introduced between the intermediate pipe 13 and the inside of the suction chamber 10. Pressure will remain. Here, while the unrotor is operating at 18.18 degrees, the pistons 4 on the low pressure side and the high pressure side continue to operate, so in the second cylinder 3 filled with gas with high pressure and high specific weight, the suction valve 17 or become greatly affected by pressure fluctuations inside it. As a result, when the pressure of the second cylinder 3 increases, the suction valve 17 is momentarily pushed up in the L direction, and as the piston 4 moves up and down, the unloading piston 19 repeatedly moves up and down in small steps, creating a so-called chatter link. There were times when this happened.

そして、このチャタリンクか頻繁に生した場合、弁座板
22と接触するアンロードピストン19の先端か著しく
摩耗を生し、製品寿命か低下するという不具合かあった
If this chatter link occurs frequently, the tip of the unloading piston 19 that comes into contact with the valve seat plate 22 will wear out significantly, resulting in a shortened product life.

本発明の目的は、アンロード運転時に高圧側圧縮部での
アンローダ部分の振動か生しないようにして製品寿命を
延ばし得る多段往復動圧縮機を提供せんとするものであ
る。
An object of the present invention is to provide a multistage reciprocating compressor that can extend the product life by preventing vibration of the unloader section in the high pressure side compression section during unloading operation.

(課題を解決するための手段) 本発明は、上述した課題を解決するための手段として、
低圧側圧縮部の吐出室と高圧側圧縮部の吸入室とを中間
パイプで連結し、さらに該低圧側圧縮部と高圧側圧縮部
に各吸入室の弁を開放状態に維持するアンローダを設け
た多段往復動圧縮機において、前記低圧側のアンローダ
の作動タイミンクを前記高圧側のアンローダの作動タイ
ミングよりも遅らせるd延手段を設けるようにしたもの
である。
(Means for Solving the Problems) The present invention provides, as means for solving the above-mentioned problems,
The discharge chamber of the low-pressure side compression section and the suction chamber of the high-pressure side compression section are connected by an intermediate pipe, and an unloader is provided in the low-pressure side compression section and the high-pressure side compression section to maintain the valves of each suction chamber in an open state. The multi-stage reciprocating compressor is provided with a d extension means for delaying the operation timing of the low-pressure side unloader from the operation timing of the high-pressure side unloader.

(作用) このように構成したことにより、低圧側圧縮部でアンロ
ータか作動してしばらくの間、高圧側圧縮部では気体の
吸入、圧縮、吐出の動作か続けられる。このため、中間
パイプ内の圧力は低下してゆき、この圧力が充分低下し
たところで高圧側圧縮部のアンローダが作動する。その
結果、高圧側圧縮部はその内部を低圧に維持したままア
ンロード運転を行う。
(Function) With this configuration, while the unrotor operates in the low-pressure side compression section, the operations of sucking, compressing, and discharging gas continue in the high-pressure side compression section for a while. Therefore, the pressure inside the intermediate pipe decreases, and when this pressure decreases sufficiently, the unloader of the high-pressure side compression section is activated. As a result, the high-pressure compression section performs unloading operation while maintaining its internal pressure at low pressure.

(実施例) 以下、本発明の実施例を第1.2図および第4図に基づ
いて詳細に説明するする。 尚、従来の技術の説明に用
いた第4図は同一構成部分であるためそのまま援用する
ものとし、従来の技術と同一部分は同一符号て示し、重
複する部分の説明は一部省略するものとする。
(Example) Hereinafter, an example of the present invention will be described in detail based on FIGS. 1.2 and 4. In addition, since FIG. 4 used to explain the conventional technology has the same constituent parts, it will be referred to as is, and the same parts as the conventional technology will be indicated by the same reference numerals, and the explanation of some overlapping parts will be omitted. do.

本発明にかかる多段往復動圧縮機は、前述した従来のも
のと全く同様にクランクケースlに高圧側圧縮部の第一
のシリンダ2と低圧側圧縮部の第二のシリンダ3が連接
され、低圧側のシリンダヘッド7の吐出室(図示せず)
と高圧側のシリンダへラド8の吸入室10とが中間パイ
プ13を介して連結されている。そして、第一のシリン
ダ2と第二のシリンダ3による二段階の圧縮は、前述し
た従来のものと同様の内部機構によって行なわれる。ま
た1、低圧側と高圧側の各吸入室9.10には、アンロ
ードピストン19を有するアンロータ18.18°か装
着されており、このアンローダ18.18’操作用の圧
縮気体を導入するための導入配管21は、同一の圧力源
に(例えば、圧縮気体貯留用のタンクに圧力調整弁を介
して)接続されている。
In the multi-stage reciprocating compressor according to the present invention, the first cylinder 2 of the high-pressure side compression section and the second cylinder 3 of the low-pressure side compression section are connected to the crankcase l, just like the conventional one described above, and the low-pressure Discharge chamber of side cylinder head 7 (not shown)
and the suction chamber 10 of the rad 8 are connected to the cylinder on the high pressure side via an intermediate pipe 13. The two-stage compression by the first cylinder 2 and the second cylinder 3 is performed by an internal mechanism similar to the conventional one described above. In addition, 1. Each suction chamber 9.10 on the low pressure side and high pressure side is equipped with an unrotor 18.18° having an unloading piston 19, and in order to introduce compressed gas for operating the unloader 18.18'. The inlet pipes 21 are connected to the same pressure source (for example, to a tank for storing compressed gas via a pressure regulating valve).

ここまての構成は、従来のものと同じであるが、本発明
にかかる多段往復動圧縮機は、低圧側から高圧側に向か
う導入配管21の途中に圧力の伝達を遅らせる遅延手段
としての器具24が接続されている。この器具24は、
第2図に示すようにその両端に接続用の螺子部25か形
成され、その中央内部にオリフィス26と拡大室27が
隣接して形成されている。オリフィス26は低圧側に位
置され、拡大室27は高圧側に位置されており、オリフ
ィス26の低圧側の端部にはその目詰まりを防止するた
めのフィルタ28か取付けられている。
The configuration up to this point is the same as the conventional one, but the multistage reciprocating compressor according to the present invention includes a device as a delay means for delaying the transmission of pressure in the middle of the introduction pipe 21 going from the low pressure side to the high pressure side. 24 are connected. This instrument 24 is
As shown in FIG. 2, connecting threads 25 are formed at both ends, and an orifice 26 and an enlarged chamber 27 are formed adjacent to each other in the center thereof. The orifice 26 is located on the low pressure side, the expansion chamber 27 is located on the high pressure side, and a filter 28 is attached to the end of the orifice 26 on the low pressure side to prevent clogging.

尚、導入配管21は、以下の説明の都合上、圧力源と低
圧側のアンローダ18を接続する管路をA、このアンロ
ーダ18と器具24を接続する管路をB、器具24と高
圧側のアンローダ18゛を接続する管路をCと呼ぶもの
とする。
For convenience of explanation below, the introduction piping 21 is designated as A, a pipe connecting the pressure source and the unloader 18 on the low pressure side, B, a pipe connecting the unloader 18 and the device 24, and a pipe connecting the device 24 and the high pressure side. The conduit connecting the unloader 18' will be called C.

以上の構成において、圧縮気体貯留用のタンクか所定圧
に達すると、アンローダ18,18’操作用の圧縮気体
が導入配管21の管路A、Bに供給される。管路Aに供
給された圧縮気体は即時に低圧側のアンローダ18に導
入されるか、管路Bに供給された圧縮気体はオリフィス
26で絞られた後拡大室27を満たしてから管路Cを通
ってアンロータ18゜に導入される。このため、高圧側
のアンローダ18”は低圧側のアンローダ18よりも遅
れたタイミングて吸入弁17を開く。
In the above configuration, when the tank for compressed gas storage reaches a predetermined pressure, compressed gas for operating the unloaders 18 and 18' is supplied to the pipes A and B of the introduction pipe 21. The compressed gas supplied to the pipe A is immediately introduced into the unloader 18 on the low pressure side, or the compressed gas supplied to the pipe B is throttled in the orifice 26 and then filled in the expansion chamber 27 before being introduced into the pipe C. and is introduced into the unrotor 18°. Therefore, the high-pressure side unloader 18'' opens the suction valve 17 at a later timing than the low-pressure side unloader 18.

低圧側のアンローダ18か吸入弁16を開くと、吸入室
9から第一のシリンダ2に低圧の気体か導入される(圧
縮気体として圧縮エアを用いる場合にはフィルタ14を
介して大気か導入される)。ここて第一のシリンダ2の
圧力よりも中間パイプ13の圧力の方が大きくなる。こ
の後、高圧側圧縮部においては、アンロータ18′か作
動するまての開気体の吸入、圧縮、吐出か連続的に続け
られるため、中間パイプ13と吸入室10の内部は次第
に圧力が低下していく。この後、高圧側のアンローダ1
8°が作動して吸入弁17か開くと、第二のシリンダ3
は吸入室10の圧力が導入されて低圧状態となる。
When the low-pressure side unloader 18 or suction valve 16 is opened, low-pressure gas is introduced from the suction chamber 9 into the first cylinder 2 (if compressed air is used as the compressed gas, atmospheric air is introduced via the filter 14). ). Here, the pressure in the intermediate pipe 13 becomes greater than the pressure in the first cylinder 2. After that, in the high-pressure side compression section, the open gas is continuously sucked, compressed, and discharged until the unrotor 18' operates, so the pressure inside the intermediate pipe 13 and the suction chamber 10 gradually decreases. To go. After this, unloader 1 on the high pressure side
8° operates and the suction valve 17 opens, the second cylinder 3
The pressure in the suction chamber 10 is introduced and becomes a low pressure state.

その結果、吸入弁17はピストン4の作動による第二の
シリンダ3の内部の°圧力変動の影響をほとんど受けな
くなり、アンロードピストン19の振動、即ち、チャタ
リングは確実に防止される。そして、チャタリングが無
くなるため、アンロードピストン19の先端部の摩耗は
著しく減少する。さらに従来ては、アンロードピストン
19の摩耗によって、その先端が第4図に示す弁座板2
2のガイド部23から異常に突出し、吸入弁17を破損
するトラブルも稀に起っていたか、このようなトラブル
も生じなくなる。また、この実施例のように導入配管2
1の途中に遅延手段としての器具24を介装するように
すれば、従来のものに対し、導入配管のみを僅かに改良
するだけで本発明にかかる多段往復動圧縮機を得ること
が出来るようになる。
As a result, the suction valve 17 is hardly affected by pressure fluctuations inside the second cylinder 3 due to the operation of the piston 4, and vibration, that is, chattering, of the unloading piston 19 is reliably prevented. Since chattering is eliminated, wear at the tip of the unload piston 19 is significantly reduced. Furthermore, conventionally, due to wear of the unloading piston 19, the tip of the unloading piston 19 has been damaged by the valve seat plate 2 shown in FIG.
The trouble of abnormally protruding from the guide portion 23 of No. 2 and damaging the suction valve 17 has occurred rarely, and such trouble will no longer occur. In addition, as in this embodiment, the introduction pipe 2
1, the multi-stage reciprocating compressor according to the present invention can be obtained by only slightly improving the introduction piping compared to the conventional one. become.

尚1本発明の実施態様は以上て説明したものに限るもの
ではなく、例えば遅延手段は、器具24にオリフィス2
6たけを設けたり拡大室27たけを設けるようにしても
良く、また、低圧側圧縮部から高圧側圧縮部に向かう圧
縮気体の導入配管21を高圧側のアンローダ18°の作
動タイミングが遅くなるように延長するようにしてもよ
い。
Note that the embodiments of the present invention are not limited to those described above; for example, the delay means may include an orifice 2 in the device 24.
In addition, the compressed gas introduction pipe 21 from the low-pressure side compression section to the high-pressure side compression section may be arranged so that the operation timing of the high-pressure side unloader 18° is delayed. It may be extended to

(発明の効果) 以上て詳細に説明したように1本発明によれば、高圧側
圧縮部も低圧側圧縮部と同様に低圧状態を維持したまま
アンロード運転を行なうようになるので、アンロード運
転時のアンローダ部分における振動が無くなり、この振
動による部品の摩耗が生じなくなる。その結果、アンロ
ーダの寿命か著しく延びる。
(Effects of the Invention) As explained above in detail, according to the present invention, the high-pressure side compression section also performs unloading operation while maintaining the low pressure state like the low-pressure side compression section, so the unloading operation is performed while maintaining the low pressure state. There is no vibration in the unloader part during operation, and wear of parts due to this vibration does not occur. As a result, the life of the unloader is significantly extended.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示す正面図、第2図は同実
施例における要部の拡大断面図、第3図は従来の技術を
示す模式断面図、第4図は第3図の■に対応する拡大断
面図である。 2・・・第一のシリンダ(低圧側圧縮部)3・・・第二
のシリンダ(高圧側圧縮部)13・・・中間パイン。 18、 ]8°・・・アンロータ、 24・・・遅延手段としての器具
Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main parts of the same embodiment, Fig. 3 is a schematic sectional view showing a conventional technique, and Fig. 4 is the same as Fig. 3 FIG. 2... First cylinder (low pressure side compression section) 3... Second cylinder (high pressure side compression section) 13... Intermediate pine. 18, ]8°... unrotor, 24... appliance as delay means

Claims (1)

【特許請求の範囲】[Claims] (1)低圧側圧縮部の吐出室と高圧側圧縮部の吸入室と
を中間パイプで連結し、さらに該低圧側圧縮部と高圧側
圧縮部に各吸入室の弁を開放状態に維持するアンローダ
を設けた多段往復動圧縮機において、前記低圧側のアン
ローダの作動タイミングを前記高圧側のアンローダの作
動タイミングよりも遅らせる遅延手段を設けたことを特
徴とする多段往復動圧縮機。
(1) An unloader that connects the discharge chamber of the low-pressure side compression section and the suction chamber of the high-pressure side compression section with an intermediate pipe, and further maintains the valves of each suction chamber in the low-pressure side compression section and the high-pressure side compression section in an open state. A multi-stage reciprocating compressor comprising: a delay means for delaying the operation timing of the low-pressure side unloader from the operation timing of the high-pressure side unloader.
JP20599888A 1988-08-19 1988-08-19 Multi-stage reciprocating compressor Expired - Lifetime JP2648938B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20599888A JP2648938B2 (en) 1988-08-19 1988-08-19 Multi-stage reciprocating compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20599888A JP2648938B2 (en) 1988-08-19 1988-08-19 Multi-stage reciprocating compressor

Publications (2)

Publication Number Publication Date
JPH0255884A true JPH0255884A (en) 1990-02-26
JP2648938B2 JP2648938B2 (en) 1997-09-03

Family

ID=16516216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20599888A Expired - Lifetime JP2648938B2 (en) 1988-08-19 1988-08-19 Multi-stage reciprocating compressor

Country Status (1)

Country Link
JP (1) JP2648938B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018031335A (en) * 2016-08-26 2018-03-01 株式会社日立産機システム Compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018031335A (en) * 2016-08-26 2018-03-01 株式会社日立産機システム Compressor

Also Published As

Publication number Publication date
JP2648938B2 (en) 1997-09-03

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