JPH02248678A - Screw compressor - Google Patents

Screw compressor

Info

Publication number
JPH02248678A
JPH02248678A JP6905589A JP6905589A JPH02248678A JP H02248678 A JPH02248678 A JP H02248678A JP 6905589 A JP6905589 A JP 6905589A JP 6905589 A JP6905589 A JP 6905589A JP H02248678 A JPH02248678 A JP H02248678A
Authority
JP
Japan
Prior art keywords
oil
rotor
slide
slide valve
load
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
JP6905589A
Other languages
Japanese (ja)
Other versions
JPH07107390B2 (en
Inventor
Osamu Hikita
引田 修
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries 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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP6905589A priority Critical patent/JPH07107390B2/en
Publication of JPH02248678A publication Critical patent/JPH02248678A/en
Publication of JPH07107390B2 publication Critical patent/JPH07107390B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To secure the optimal oil feeding quantity corresponding to a load operated condition by providing oil connecting ports for connecting the oil from an oil tank to one of oil feeding passages corresponding to a slide position of a slide valve in a slide guide body of the slide valve, and providing an oil quantity setting mechanism in oil feeding passages. CONSTITUTION:At the time of various load operation by the moving operation of a slide valve 4, one of oil feeding passages 41-43 is selectively connected to one of oil connecting ports 51-53 provided in a slide guide body 5. Each oil exhaust port 41a-43a provided in each oil feeding passage 41-43 is displaced in the slide direction of the valve 4 to be opened at a position corresponding to the load factor, and port diameters of the exhaust ports 41a-43a are set in large, middle and small respectively. Consequently, the optimal oil feeding quantity corresponding to a load operated condition is fed to a screw rotor 3 side. Therefore, in the case of the low load operation, a little oil quantity is fed from the exhaust port 43a to the rotor 3 side to reduce the agitation power loss to be caused by the oil of the rotor 3, and further, the rotor 3 is sufficiently sealed with that oil to improve the volumetric efficiency.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、スクリュー圧縮機における給油機構に関する
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an oil supply mechanism in a screw compressor.

(従来の技術) 一般に、スクリュー圧縮機は、スクリューロータの外周
部位に、該ロータに対するスライド操作で負荷率を変更
するスライド弁を設け、このスライド弁に油タンクに連
通される給油通路を設けると共に、該給油通路の前記ロ
ータとの対向部位に油噴出口を開口させ、高圧側に開放
される油タンクと、油噴出口の開口される中間圧力室と
の間の高低圧力差で前記噴出口から油を噴出し、前記口
−夕で圧縮される圧縮ガスを冷却したり、該ロータとケ
ーシング間などの隙間をシールしたり、また、軸受箇所
の潤滑などを行うようにしている。
(Prior Art) Generally, a screw compressor is provided with a slide valve on the outer periphery of a screw rotor that changes the load factor by sliding operation on the rotor, and this slide valve is provided with an oil supply passage communicating with an oil tank. , an oil spout is opened at a portion of the oil supply passage facing the rotor, and the jet nozzle is controlled by a pressure difference between the high and low pressures between the oil tank opened to the high pressure side and the intermediate pressure chamber where the oil spout is opened. Oil is ejected from the rotor to cool the compressed gas compressed between the ports, seal the gap between the rotor and the casing, and lubricate the bearings.

所で、以上のスクリュー圧縮機において、前記給油通路
に設ける油噴出口の口径やその位置を設定するにあたっ
て、前記ロータの全負荷運転時を基準として設定すると
、この全負荷運転時では圧縮ガスを冷却したりするのに
最適な油量を確保できるのであるが、この反面、低負荷
運転を行う場合には、ガス量が減少され、圧縮ガスを冷
却するための油量も少なくてすむのに対し、過剰に給油
されることとなって、この過剰油により前記ロータによ
る油の撹拌動力が増大して動力損失を生じ、効率の低下
を招いたのである。
By the way, in the above-mentioned screw compressor, when setting the diameter and position of the oil spout provided in the oil supply passage, if the settings are set based on the full load operation of the rotor, the compressed gas is On the other hand, when operating at low load, the amount of gas is reduced and the amount of oil needed to cool the compressed gas can be reduced. On the other hand, excessive oil was supplied, and this excess oil increased the power for agitating the oil by the rotor, resulting in a power loss and a decrease in efficiency.

そこで、以上のような問題を改善するために、以前に、
特開昭54−83881号公報が提案され、この公報記
載のものは、第8図に示したごとく、ケーシング(C)
の内部に、スクリューロータ(R)とスライド弁(V)
とを備え、前記ケーシング(C)に油タンクに連通され
る油孔(0)を形成すると共に、前記スライド弁(V)
に、外周軸方向に廷びる長孔(A)と、該長孔(A)を
前記ロータ(R)側に開口させる給油通路(B)とを設
けて、全負荷運転時には、前記油孔(0)から前記長孔
(A)と給油通路(B)を経て前記ロータ(R)側に充
分な油量を噴出させ、また、低負荷運転時には、前記ス
ライド弁(V)の移動に伴い前記長孔(A)と前記油孔
(0)とを遮断して、前記ロータ(R)側への給油を停
止させ、低負荷運転時の動力ti失をなくして、効率を
高めるようにしている。
Therefore, in order to improve the above problems, we previously
Japanese Unexamined Patent Application Publication No. 54-83881 was proposed, and the product described in this publication has a casing (C) as shown in Fig. 8.
Inside the screw rotor (R) and slide valve (V)
an oil hole (0) communicating with the oil tank is formed in the casing (C), and the slide valve (V)
is provided with a long hole (A) extending in the direction of the outer circumferential axis and an oil supply passage (B) that opens the long hole (A) toward the rotor (R), so that during full load operation, the oil hole ( 0) through the elongated hole (A) and the oil supply passage (B) to the rotor (R) side, and during low load operation, as the slide valve (V) moves, The long hole (A) and the oil hole (0) are shut off to stop oil supply to the rotor (R) side, thereby eliminating power loss during low load operation and increasing efficiency. .

(発明が解決しようとする課M) 所が、以上の圧縮機では、低負荷運転時に、前記ロータ
(R)に対する給油が一切停止されるため、該ロータ(
R)とケーシング(C)間などの油によるシール効果を
tiなって、体積効率の低下を招いたり、また、低負荷
運転時に急激な圧力変動が発生したような場合、又は長
期停止後に低負荷で再起動を行うような場合に、油によ
る冷却が一切行われないことから、吐出ガス温度が急上
昇して、前記ロータ(R)とケーシング(C)間などに
おいて焼付けを起こすことがあった。
(Problem M to be solved by the invention) However, in the above compressor, since the oil supply to the rotor (R) is completely stopped during low load operation, the rotor (R)
The sealing effect of the oil between the R When the engine is restarted, the temperature of the discharged gas rises rapidly because there is no oil cooling at all, which can cause seizure between the rotor (R) and the casing (C).

本発明は以上のような問題に鑑みてなしたもので、その
目的は、負荷運転状態に見合った最適な給油量を確保で
きて、低負荷運転時に、動力損失をできるだけ低減しな
がら、シール効果を充分に発揮でき、しかも焼付けなど
の問題も解決できるスクリュー圧縮機を提供することに
ある。
The present invention was made in view of the above-mentioned problems.The purpose of the present invention is to ensure an optimal amount of oil supply commensurate with the load operating condition, reduce power loss as much as possible during low-load operation, and maintain sealing effectiveness. To provide a screw compressor which can fully exhibit the functions and solve problems such as seizure.

(課題を解決するための手段) 上記目的を達成するために、本発明は、スライド位置に
より負荷率を変更するスライド弁(4)を備え、該スラ
イド弁(4)に設ける給油通路を介して油タンク(8)
からスクリューロータ(3)に給油を行うようにしたス
クリュー圧縮機において、前記スライド弁(4)に、複
数本の給油通路(41,42,43)を設けて、該6給
油通路(41,42,43)を前記ロータ(3)の対向
部に複数の油噴出口(41al 42 al 43a)
を介して開口すると共に、前記スライド弁(4)のスラ
イドガイド体(5)に、前記油タンク(6)からの油を
、前記スライド弁(4)のスライド位置に対応して前記
給油通路(41,42,43)のうち一つに接続する油
接続口(51,52,53)を設ける一方、この各油接
続口(51,52,53)から各油噴出口(41a+4
2a+ 43a)に至る給油経路に、負荷率に応じた油
量を設定する油量設定機構を設けたことを特徴とするも
のである。
(Means for Solving the Problems) In order to achieve the above object, the present invention is provided with a slide valve (4) that changes the load factor depending on the slide position, and a fuel supply passage provided in the slide valve (4). Oil tank (8)
In a screw compressor configured to supply oil to the screw rotor (3) from the slide valve (4), a plurality of oil supply passages (41, 42, 43) are provided in the slide valve (4), and the six oil supply passages (41, 42 , 43) with a plurality of oil spouts (41al 42al 43a) on the opposing part of the rotor (3).
The slide guide body (5) of the slide valve (4) receives oil from the oil tank (6) in accordance with the slide position of the slide valve (4). An oil connection port (51, 52, 53) is provided to connect to one of the oil connection ports (51, 52, 53), and each oil outlet (41a+4) is provided from each oil connection port (51, 52, 53).
2a+43a) is characterized by providing an oil amount setting mechanism for setting the oil amount according to the load factor.

また、前記各油噴出口(41ae 42a、43a)は
、負荷率に応じた位置に開口させることが望ましい。
Further, it is desirable that each of the oil jet ports (41ae, 42a, 43a) be opened at a position corresponding to the load factor.

(作用) 以上のスクリュー圧縮機では、前記スライド弁(4)の
移動操作による各種負荷運転時に、前記各給油通路(4
1,42,43)の一つが、前記ガイド体(5)に設け
た各油接続口(51,52.53)の一つに選択的に接
続され、負荷率に応じて油量を設定する前記油量設定機
構により、前記各給油通路(41,42,43)に設け
られた油噴出口(41al 42a+ 43a)の一つ
から、負荷運転状態に見合った最適な給油量が前記ロー
タ(3)側に給油されるのであり、従って、低負荷運転
を行うような場合には、少ない油量が前記ロータ(3)
側に給油されることとなって、このロータ(3)の油に
よる撹拌動力損失が低減され、しかも該ロータ(3)な
どのシールが前記部で充分に行われて、体積効率が高め
られ、その上焼付きなども防止されるのである。
(Function) In the above screw compressor, during various load operations by moving the slide valve (4), each of the oil supply passages (4)
1, 42, 43) is selectively connected to one of the oil connection ports (51, 52, 53) provided on the guide body (5), and sets the oil amount according to the load factor. The oil amount setting mechanism allows the rotor (3 ) side. Therefore, when performing low-load operation, a small amount of oil is supplied to the rotor (3) side.
Since the oil is supplied to the side, the stirring power loss due to the oil in the rotor (3) is reduced, and the rotor (3) etc. is sufficiently sealed in the aforementioned portion, increasing the volumetric efficiency. Moreover, seizure is also prevented.

また、前記各油噴出口(41a、42a、43a)を、
負荷率に応じた位置に開口させるときには、負荷運転状
態に対応した適正位置を選択して、最適な給油が行える
In addition, each of the oil spouts (41a, 42a, 43a),
When opening at a position corresponding to the load factor, an appropriate position corresponding to the load operating condition is selected to perform optimal oil supply.

(実施例) 第7図に示したスクリュー圧縮機は、密閉構造とされた
ケーシング(1)の内部に、シャフト(2)を介してス
クリューロータ(3)を回転自由に支持すると共に、こ
のロータ(3)にlt6スクリユー溝(3a)に一対の
ゲートロータ(図示せず)を噛合させて、前記スクリュ
ーロータ(3)の回転により、低圧側から冷媒ガスを吸
入して前記スクリュー溝(3a)内で圧縮するようにな
す一方、前記スクリューロータ(3)の外周部位に、負
荷率を変更するスライド弁(4)を移動自由に設けて、
該スライド弁(4)の移動操作で、前記ケーシング(1
)内で圧縮される冷媒ガスの一部を、バイパス路(1d
)を介して低圧側にバイパスさせることにより、容量制
御を行うようにしている。
(Example) The screw compressor shown in Fig. 7 has a screw rotor (3) rotatably supported inside a casing (1) having a sealed structure via a shaft (2), and this rotor. (3) A pair of gate rotors (not shown) are meshed with the lt6 screw groove (3a), and the rotation of the screw rotor (3) sucks refrigerant gas from the low pressure side, and the screw groove (3a) A slide valve (4) for changing the load factor is provided on the outer circumference of the screw rotor (3) so as to be freely movable.
By moving the slide valve (4), the casing (1)
) A part of the refrigerant gas compressed in the bypass path (1d
), the capacity is controlled by bypassing it to the low pressure side.

また、前記シャフト(2)上でスクリューロータ(3)
の側部には、前記スライド弁(4)を摺動案内するスラ
イドガイド体(5)を設け、該ガイド体(5)に複数の
軸受(2a)を介して前記シャフト(2)を回転自由に
支持している。
Moreover, a screw rotor (3) is mounted on the shaft (2).
A slide guide body (5) for slidingly guiding the slide valve (4) is provided on the side of the slide valve (4), and the shaft (2) is freely rotatable on the guide body (5) via a plurality of bearings (2a). I support it.

更に、前記ケーシング(1)の側部には、高圧側に開放
される油タンク(6)を配設して、該タンク(6)内の
油をフィルタ(6a)を介して、後で詳述するように、
前記スクリューロータ(3)に給油するようにしている
Furthermore, an oil tank (6) that is open to the high pressure side is provided on the side of the casing (1), and the oil in the tank (6) is passed through a filter (6a) to be drained in detail later. As mentioned,
The screw rotor (3) is supplied with oil.

しかして、以上のスクリュー圧縮機において、第1図乃
至第3図で明らかにしたごとく、前記スライド弁(4)
の内部に、そのスライド方向に向けて延びる3本の第1
乃至第3給油通路(41゜42.43)をそれぞれ独立
状に開設して、これら各給油通路(41,42,43)
を前記ロータ(3)の対向部位に、それぞれ第1乃至第
3油噴出口(41a+ 42a、43a)を介して開口
させると共に、前記スライドガイド体(5)に、前記油
タンク(θ)側に連通される1つの油孔(54)を開設
して、この油孔(54)の先端側に、放射方向に向けて
延び、前記各給油通路(41゜42.43)に選択的に
接続される3本の第1乃至第3油接続口(51,52,
53)を開設し、前記スライド弁(4)のスライド位置
に対応して、前記各給油通路(41,42,43)の1
つを前記各油接続口(51,52,53)の1つに接続
させるようになす一方、該含油接続口(51,52,5
3)から前記各油噴出口(41a +42a+ 43a
)に至る給油経路に、負荷率に応じた油量を設定する油
量設定機構を設ける。
Therefore, in the above screw compressor, as shown in FIGS. 1 to 3, the slide valve (4)
There are three first wires extending in the sliding direction inside the
The third to third refueling passages (41, 42, 43) are opened independently, and each of these refueling passages (41, 42, 43)
are opened in opposing parts of the rotor (3) through the first to third oil spout ports (41a+42a, 43a), respectively, and in the slide guide body (5) on the oil tank (θ) side. One oil hole (54) is opened to communicate with the oil hole (54), and the oil hole (54) extends in the radial direction and is selectively connected to each of the oil supply passages (41°, 42, 43). Three first to third oil connection ports (51, 52,
53), and one of the oil supply passages (41, 42, 43) is opened corresponding to the slide position of the slide valve (4).
one of the oil-containing connection ports (51, 52, 53).
3) to each of the oil spout ports (41a + 42a + 43a
) is provided with an oil amount setting mechanism that sets the oil amount according to the load factor.

具体的には、前記ガイド体(5)に設けた油孔(54)
を、第7図に示すように、前記ケーシング(1)の側部
を閉鎖する蓋体(1a)に設けた周ill (1b )
と、前記ケーシング(1)の内部に前記周溝(1b)と
連通伏に形成した油孔(IC)とを介して前記油タンク
(8)内のフィルタ(6a)に接続すると共に、前記各
油接続口(51,52,53)を前記スライド弁(4)
のスライド方向に変位させて開口させ、このスライド弁
(4)の移動操作に伴うスライド位置の変更で、前記各
給油通路(,41,42,43)の1つを、前記各油接
続口(51,52,53)の1つに接続させて、前記油
タンク(6)からの油を前記各噴出口(41a+ 42
a、43a)の1つから前記ロータ(3)側に向けて選
択的に噴出させるようになす。
Specifically, the oil hole (54) provided in the guide body (5)
As shown in FIG.
is connected to the filter (6a) in the oil tank (8) through an oil hole (IC) formed inside the casing (1) so as to communicate with the circumferential groove (1b), and Connect the oil connection ports (51, 52, 53) to the slide valve (4).
By displacing the slide valve (4) in the sliding direction and opening it, and changing the slide position accompanying the movement operation of the slide valve (4), one of the oil supply passages (41, 42, 43) is connected to the oil connection port (41, 42, 43). 51, 52, 53), and the oil from the oil tank (6) is connected to one of the spout ports (41a+42).
a, 43a) is selectively ejected toward the rotor (3).

また、前記油量設定機構としては、前記各給油通路(4
1,42,43)の先端側で、前記ロータ(3)との対
向部位に開口される前記各噴出口(41a、42a、4
3a)の口径を、それぞれ大小径とするのであり、例え
ば第2図でも明らかなごとく、前記第1噴出口(41a
)を大径とし、第2噴出口(42a)を中径となし、ま
た、第3噴出口(43a)を小径となすのである。
Further, as the oil amount setting mechanism, each of the oil supply passages (4
1, 42, 43), each of the jet ports (41a, 42a, 4
3a) are made large and small, respectively. For example, as is clear from FIG.
) has a large diameter, the second nozzle (42a) has a medium diameter, and the third nozzle (43a) has a small diameter.

斯くして、前記スクリュー圧縮機の100%負荷運転を
行うときには、第4図に示したごとく、前記スライド弁
(4)を前記ケーシング(1)に設けたバイパス路(1
d)の全体を閉鎖するようにスライド操作するのであり
、すると、前記スライド弁(4)に設けた第1給油通路
(41)が、前記スライドガイド体(5)に形成した第
1油接続口(51)に接続されて、口径大とされた前記
第1油噴出口(41a)から前記ロータ(3)側に向け
て前記油タンク(6)の油が多量に給油されるのである
Thus, when operating the screw compressor at 100% load, as shown in FIG.
d) is slid to close the entirety, and then the first oil supply passage (41) provided in the slide valve (4) connects to the first oil connection port formed in the slide guide body (5). A large amount of oil from the oil tank (6) is supplied toward the rotor (3) from the first oil spout (41a), which is connected to the rotor (51) and has a large diameter.

また、70%の負荷運転を行うときは、第5図に示した
ごとく、前記スライド弁(4)を前記バイパス路(1d
)の一部を開放させるようにスライド操作するのであり
、すると、前記第2給油通路(42)が前記第2油接続
口(52)に接続されて、中口径とされた第2油噴出口
(42a)から前記ロータ(3)側に向けて中量の油が
給油されるのである。
In addition, when performing 70% load operation, as shown in FIG.
), the second oil supply passage (42) is connected to the second oil connection port (52), and a second oil spout having a medium diameter is opened. A medium amount of oil is supplied from (42a) toward the rotor (3).

更に、40%の負荷運転を行うときは、第6図に示した
ごとく、前記スライド弁(4)を前記バイパス路(ld
)の全体を開放させるようにスライド操作するのであり
、すると、前記第3給油通路(43)が前記第3油接続
口(53)に接続されて、小口径とされた第3油噴出口
(43a)から前記ロータ(3)側に向けて小量の油が
給油されるのである。
Furthermore, when performing 40% load operation, as shown in FIG.
), the third oil supply passage (43) is connected to the third oil connection port (53), and the third oil spout (53), which has a small diameter, is opened. A small amount of oil is supplied from 43a) toward the rotor (3).

また、前記各給油通路(41,42,43)に設ける各
油噴出口(41a、42a、43a)は、第2図に明ら
かにしたように、前記スライド弁(4)のスライド方向
に変位させて、負荷率に応じた位置に開口させるのであ
り、例えば10094負荷運転時に前記ロータ(3)側
に開口される第1噴出口(41a)は、前記スライド弁
(4)の最先端側に、かつ、70%負荷運転時に開口さ
れる第2噴出口(42a)は、前記第1噴出口(41a
)の内方側に、また、40%負荷運転時に開口される第
3噴出口(43a)は、最内刃側にそれぞれ形成するの
であり、斯くするときには、各種負荷運転に対応した適
正位置が選択されて、最適な給油が行えるのである。
Further, as shown in FIG. 2, each oil spout (41a, 42a, 43a) provided in each of the oil supply passages (41, 42, 43) is displaced in the sliding direction of the slide valve (4). For example, the first jet port (41a) that opens toward the rotor (3) during 10094 load operation is located at the most extreme side of the slide valve (4). In addition, the second jet port (42a) that is opened during 70% load operation is similar to the first jet port (41a).
), and the third spout (43a) that opens during 40% load operation is formed on the innermost blade side, and when doing so, the appropriate position corresponding to various load operations is determined. Depending on the selection, optimal refueling can be performed.

尚、第7図の実施例では、前記スライド弁(4)の背面
側に、操作ロッド(7)を延設し、該ロッド(7)を操
作アーム(8)を介して、操作シリンダ(9)に連動し
、該シリンダ(9)により前記スライド弁(4)の移動
量、すなわち、負荷率をi!A整するようにしている。
In the embodiment shown in FIG. 7, an operating rod (7) is extended from the back side of the slide valve (4), and the rod (7) is connected to the operating cylinder (9) via the operating arm (8). ), the cylinder (9) changes the amount of movement of the slide valve (4), that is, the load factor i! I try to keep things A-adjusted.

(発明の効果) 以上説明したように、本発明のスクリュー圧縮機では、
スライド弁(4)に、複数本の給油通路(41,42,
43)を設けて、この各給油通路(41,42,43)
をスクリューロータ(3)の対向部に複数の油噴出口(
41al 42 al 43a)を介して開口させると
共に、前記スライド弁(4)のスライドガイド体(5)
に、油タンク(6)からの油を、前記スライド弁(4)
のスライド位置に対応して前記給油通路(41,42゜
43)のうち一つに接続する油接続口(51,52,5
3)を設ける一方、この各油接続口(51,52,53
)から各油噴出口(41a、42al  43a)に至
る給油経路に、負荷率に応じた油量を設定する油量設定
機構を設けたから、負荷運転杖態に見合った最適な給油
量を前記ロータ(3)側に給油できるのであり、従って
、低負荷運転時に前記ロータ(3)の油による撹拌動力
損失を低減できながら、該ロータ(3)などのシールを
確実に行い得て、体積効率を高め得るのであり、しかも
焼付きなども確実に防止できるに至ったのである。
(Effect of the invention) As explained above, in the screw compressor of the present invention,
The slide valve (4) has multiple oil supply passages (41, 42,
43), and each oil supply passage (41, 42, 43)
A plurality of oil spouts (
41al 42al 43a) and the slide guide body (5) of the slide valve (4).
Then, the oil from the oil tank (6) is transferred to the slide valve (4).
An oil connection port (51, 52, 5) connected to one of the oil supply passages (41, 42° 43) corresponding to the sliding position of
3), while each oil connection port (51, 52, 53
) to each oil spout (41a, 42al, 43a) is provided with an oil amount setting mechanism that sets the oil amount according to the load factor, so that the optimum oil amount corresponding to the load operation condition can be set to the rotor. (3) side, therefore, it is possible to reduce stirring power loss due to oil in the rotor (3) during low load operation, and to ensure sealing of the rotor (3) etc., thereby increasing volumetric efficiency. Moreover, it has now been possible to reliably prevent burn-in and the like.

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

第1図は本発明にかかるスクリュー圧縮機の要部を示す
側断面図、第2図はスライド弁の展開図、第3図はスラ
イドガイド体の展開図、第4図乃至第6図はそれぞれ各
種負荷運転状態を示す断面図、第7図は同スクリエー圧
縮機の全体構造を示す縦断面図、第8図は従来例を示す
図面である。 (3)−・・・・・・・・スクリューロータ(4)・・
・・・・・・・スライド弁 (41,42,43) @・・−・給油通路(41a、
42a、43a)am油噴出口(5)・・・・・・1・
スライドガイド体(51,52,53)・・−・・油接
続口(6)・拳・・・・・・・−油タンク 第1図 第8図
Fig. 1 is a side sectional view showing the main parts of the screw compressor according to the present invention, Fig. 2 is a developed view of the slide valve, Fig. 3 is a developed view of the slide guide body, and Figs. 4 to 6 are respectively 7 is a longitudinal sectional view showing the overall structure of the same screier compressor, and FIG. 8 is a drawing showing a conventional example. (3)-...Screw rotor (4)...
...... Slide valve (41, 42, 43) @... - Oil supply passage (41a,
42a, 43a) AM oil spout (5)...1.
Slide guide body (51, 52, 53) --- Oil connection port (6), fist --- Oil tank Figure 1 Figure 8

Claims (1)

【特許請求の範囲】 1)スライド位置により負荷率を変更するスライド弁(
4)を備え、該スライド弁(4)に設ける給油通路を介
して油タンク(6)からスクリューロータ(3)に給油
を行うようにしたスクリュー圧縮機であって、前記スラ
イド弁(4)に、複数本の給油通路(41、42、43
)を設けて、該各給油通路(41、42、43)を前記
ロータ(3)の対向部に複数の油噴出口(41a、42
a、43a)を介して開口すると共に、前記スライド弁
(4)のスライドガイド体(5)に、前記油タンク(6
)からの油を、前記スライド弁(4)のスライド位置に
対応して前記給油通路(41、42、43)のうち一つ
に接続する油接続口(51、52、53)を設ける一方
、この各油接続口(51、52、53)から各油噴出口
(41a、42a、43a)に至る給油経路に、負荷率
に応じた油量を設定する油量設定機構を設けたことを特
徴とするスクリュー圧縮機。 2)各油噴出口(41a、42a、43a)を、負荷率
に応じた位置に開口している請求項1記載のスクリュー
圧縮機。
[Claims] 1) A slide valve that changes the load factor depending on the slide position (
4), the screw compressor is configured to supply oil to the screw rotor (3) from an oil tank (6) via an oil supply passage provided in the slide valve (4), the screw compressor comprising: , multiple oil supply passages (41, 42, 43
), and each of the oil supply passages (41, 42, 43) is connected to a plurality of oil spouts (41a, 42) in the opposite part of the rotor (3).
a, 43a), and the oil tank (6) is opened to the slide guide body (5) of the slide valve (4).
) is provided with an oil connection port (51, 52, 53) that connects the oil from the slide valve (4) to one of the oil supply passages (41, 42, 43) corresponding to the slide position of the slide valve (4); The oil supply path from each oil connection port (51, 52, 53) to each oil spout (41a, 42a, 43a) is equipped with an oil amount setting mechanism that sets the oil amount according to the load factor. screw compressor. 2) The screw compressor according to claim 1, wherein each oil spout (41a, 42a, 43a) is opened at a position corresponding to a load factor.
JP6905589A 1989-03-20 1989-03-20 Screw compressor Expired - Lifetime JPH07107390B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6905589A JPH07107390B2 (en) 1989-03-20 1989-03-20 Screw compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6905589A JPH07107390B2 (en) 1989-03-20 1989-03-20 Screw compressor

Publications (2)

Publication Number Publication Date
JPH02248678A true JPH02248678A (en) 1990-10-04
JPH07107390B2 JPH07107390B2 (en) 1995-11-15

Family

ID=13391502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6905589A Expired - Lifetime JPH07107390B2 (en) 1989-03-20 1989-03-20 Screw compressor

Country Status (1)

Country Link
JP (1) JPH07107390B2 (en)

Cited By (6)

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WO2009093469A1 (en) 2008-01-23 2009-07-30 Daikin Industries, Ltd. Screw compressor
WO2010106787A1 (en) * 2009-03-16 2010-09-23 ダイキン工業株式会社 Screw compressor
US8366405B2 (en) 2007-12-17 2013-02-05 Daikin Industries, Ltd. Screw compressor with capacity control slide valve
JP2019108874A (en) * 2017-12-20 2019-07-04 株式会社日立産機システム Liquid supply mechanism
EP3674554A1 (en) * 2018-12-26 2020-07-01 Trane International Inc. Lubricant injection for a screw compressor
CN111406153A (en) * 2017-12-08 2020-07-10 株式会社日立制作所 Liquid-cooled compressor

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8366405B2 (en) 2007-12-17 2013-02-05 Daikin Industries, Ltd. Screw compressor with capacity control slide valve
WO2009093469A1 (en) 2008-01-23 2009-07-30 Daikin Industries, Ltd. Screw compressor
US8708677B2 (en) 2008-01-23 2014-04-29 Daikin Industries, Ltd. Screw compressor having injection having injection mechanism that injects oil or refrigerant toward a starting end of an extending direction of a helical groove of the female rotor or the male rotor
EP2410182A4 (en) * 2009-03-16 2016-03-30 Daikin Ind Ltd Screw compressor
JP4666106B2 (en) * 2009-03-16 2011-04-06 ダイキン工業株式会社 Screw compressor
JP2010242746A (en) * 2009-03-16 2010-10-28 Daikin Ind Ltd Screw compressor
US8858192B2 (en) 2009-03-16 2014-10-14 Daikin Industries, Ltd. Screw compressor
WO2010106787A1 (en) * 2009-03-16 2010-09-23 ダイキン工業株式会社 Screw compressor
CN102356240A (en) * 2009-03-16 2012-02-15 大金工业株式会社 Screw compressor
CN111406153B (en) * 2017-12-08 2022-03-22 株式会社日立制作所 Liquid-cooled compressor
CN111406153A (en) * 2017-12-08 2020-07-10 株式会社日立制作所 Liquid-cooled compressor
US11346346B2 (en) * 2017-12-08 2022-05-31 Hitachi, Ltd. Liquid-cooled type compressor having first and second nozzle injection ports with different characteristics
JP2019108874A (en) * 2017-12-20 2019-07-04 株式会社日立産機システム Liquid supply mechanism
US11359626B2 (en) 2017-12-20 2022-06-14 Hitachi Industrial Equipment Systems Co., Ltd. Screw compressor having a plurality of branch paths with intersects and central axes
EP3674554A1 (en) * 2018-12-26 2020-07-01 Trane International Inc. Lubricant injection for a screw compressor
US10876531B2 (en) 2018-12-26 2020-12-29 Trane International Inc. Lubricant injection for a screw compressor
CN111379706A (en) * 2018-12-26 2020-07-07 特灵国际有限公司 Lubricant injection for screw compressors

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Publication number Publication date
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