JP2000027776A - Scroll type fluid machinery - Google Patents

Scroll type fluid machinery

Info

Publication number
JP2000027776A
JP2000027776A JP11176722A JP17672299A JP2000027776A JP 2000027776 A JP2000027776 A JP 2000027776A JP 11176722 A JP11176722 A JP 11176722A JP 17672299 A JP17672299 A JP 17672299A JP 2000027776 A JP2000027776 A JP 2000027776A
Authority
JP
Japan
Prior art keywords
oil
valve
thrust
scroll
lubricating oil
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
JP11176722A
Other languages
Japanese (ja)
Other versions
JP3207825B2 (en
Inventor
Tetsuzo Ukai
徹三 鵜飼
Kazuya Tani
和也 谷
Original Assignee
Mitsubishi Heavy Ind Ltd
三菱重工業株式会社
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 Mitsubishi Heavy Ind Ltd, 三菱重工業株式会社 filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP17672299A priority Critical patent/JP3207825B2/en
Publication of JP2000027776A publication Critical patent/JP2000027776A/en
Application granted granted Critical
Publication of JP3207825B2 publication Critical patent/JP3207825B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To supply a proper quantity of lubricating oil to a thrust part, regardless of number of revolution of a rotary shaft, by providing an opening and closing valve device opened when a difference between upper and lower sides of a valve element exceeds a prescribed value, on an oil discharging passage discharging excess lubricating oil supplied to the thrust part. SOLUTION: Lubricating oil within an oil reservoir at the bottom part of a sealed housing 8 of a fluid machine is sucked by an oil pump 51 formed at a lower end part of a rotary shaft 5, is supplied to an upper bearing 71 and a rotary bearing 73 through an oil supply hole 52 and lubricates these bearing 71 and 73. A part of lubricating oil introduced into a chamber 61 formed on a frame 6 is drawn to a thrust part 65 by revolution motion of a rotary scroll 2 and excess lubricating oil within the chamber 61 is returned to the oil reservoir 8 via an oil discharging passage 62. In this case, an opening and closing device 90 opened when a difference of pressure within the chamber 61 and pressure within the sealed housing 8 becomes a prescribed value or more is provided on the halfway of the oil discharging passage 62 and proper quantity of lubricating oil can be always supplied to the thrust part 65.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、圧縮機・膨張機等
として用いられるスクロール型流体機械に関するもので
ある。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type fluid machine used as a compressor, an expander or the like.
【0002】[0002]
【従来の技術】図5は従来のスクロール型流体機械の縦
断面図、図6は図5のA−A断面の部分図である。図に
おいて、密閉ハウジング8の内部にはその上部にスクロ
ール型圧縮機構Cが、下部に電動モータMが配設され、
これらは回転シャフト5を介して互いに連動連結されて
いる。電動モータMはロータMaとステータMbとから
なり、ロータMaは回転シャフト5に固定され、ステー
タMbは密閉ハウジング8に固定されている。スクロー
ル型圧縮機構Cは固定スクロール1、旋回スクロール
2、旋回スクロール2の公転旋回運動を許容するが、そ
の自転を阻止するオルダムリンク等の自転阻止機構3、
固定スクロール1及び電動モータMが締結されるフレー
ム6、回転シャフト5を軸支する上部軸受71及び下部
軸受72等からなる。
2. Description of the Related Art FIG. 5 is a longitudinal sectional view of a conventional scroll type fluid machine, and FIG. 6 is a partial view of an AA section in FIG. In the drawing, a scroll-type compression mechanism C is provided in an upper part of the inside of a sealed housing 8, and an electric motor M is provided in a lower part thereof.
These are linked to each other via a rotating shaft 5. The electric motor M includes a rotor Ma and a stator Mb. The rotor Ma is fixed to the rotating shaft 5, and the stator Mb is fixed to the closed housing 8. The scroll type compression mechanism C allows the revolving orbiting motion of the fixed scroll 1, the orbiting scroll 2, and the orbiting scroll 2, but the anti-rotation mechanism 3, such as an Oldham link, for preventing the rotation.
It comprises a frame 6 to which the fixed scroll 1 and the electric motor M are fastened, an upper bearing 71 and a lower bearing 72 which support the rotary shaft 5.
【0003】固定スクロール1は端板11とその内面に
立設された渦巻き状ラップ12とを備え、この端板11
の中央部には吐出ポート13が設けられている。旋回ス
クロール2は端板21とこの内面に立設された渦巻き状
ラップ22とを備え、この端板21の外面に立設された
ボス23内にドライブブッシュ54が旋回軸受73を介
して回転自在に嵌装され、このドライブブッシュ54に
穿設された孔55内に回転シャフト5の上端から突出す
る偏心ピン53が回転自在に嵌合されている。固定スク
ロール1と旋回スクロール2とを相互に所定距離だけ偏
心させ、かつ、180度だけ角度をずらせて噛み合わせ
ることによって複数個の密閉空間24が形成されてい
る。
The fixed scroll 1 has an end plate 11 and a spiral wrap 12 erected on its inner surface.
A discharge port 13 is provided at the center of the. The orbiting scroll 2 includes an end plate 21 and a spiral wrap 22 erected on the inner surface thereof. A drive bush 54 is rotatable via a slewing bearing 73 in a boss 23 erected on the outer surface of the end plate 21. An eccentric pin 53 protruding from the upper end of the rotary shaft 5 is rotatably fitted into a hole 55 formed in the drive bush 54. A plurality of closed spaces 24 are formed by eccentrically interlocking the fixed scroll 1 and the orbiting scroll 2 with each other by a predetermined distance and shifting the angle by 180 degrees.
【0004】フレーム6は密閉ハウジング8に固定され
ており、このフレーム6の上面に形成された円環状のス
ラスト部65は旋回スクロール2の外面と摺接して旋回
スクロール2を支持している。このスラスト部65には
図7に示すように放射状に伸びる2本の給油溝66が穿
設されている。この図7の形の給油溝を第1の例とし後
述の他の形のものと区別する。回転シャフト5の内下部
には遠心式の油ポンプ51が備えられており、回転シャ
フト5の回転数の増加に伴ってその吐出圧力が増大する
ようになっている。
The frame 6 is fixed to the closed housing 8, and an annular thrust portion 65 formed on the upper surface of the frame 6 is in sliding contact with the outer surface of the orbiting scroll 2 to support the orbiting scroll 2. As shown in FIG. 7, two radial oil supply grooves 66 are formed in the thrust portion 65. The oil supply groove in the form of FIG. 7 is a first example and is distinguished from other forms described later. A centrifugal oil pump 51 is provided at the lower part of the inside of the rotating shaft 5, and the discharge pressure thereof increases as the rotating speed of the rotating shaft 5 increases.
【0005】電動モータMを駆動することによって回転
シャフト5、偏心ピン53、ドライブブッシュ54、ボ
ス23等からなる公転旋回機構を介して旋回スクロール
2が駆動され、旋回スクロール2は自転阻止機構3によ
って自転を阻止されながら公転旋回半径の円軌道上を公
転旋回運動する。すると、ガスが吸入管82を経て密閉
ハウジング8内に入り、このガスは通路85を通り吸入
通路15を経て密閉空間24内に吸入される。そして、
旋回スクロール2の公転旋回運動により密閉空間24の
容積が減少するのに伴って、圧縮されながら中央部に至
り、吐出ポート13より逆止弁17を押し開いて吐出キ
ャビティ14内に入り、ここから吐出管83を経て外部
に吐出される。
When the electric motor M is driven, the orbiting scroll 2 is driven via a revolving orbiting mechanism including a rotary shaft 5, an eccentric pin 53, a drive bush 54, a boss 23 and the like. Revolves in a circular orbit of a revolving radius while preventing rotation. Then, the gas enters the closed housing 8 through the suction pipe 82, and the gas is sucked into the sealed space 24 through the passage 85 and the suction passage 15. And
As the volume of the closed space 24 decreases due to the revolving orbiting motion of the orbiting scroll 2, the compressed space reaches the central portion while being compressed, pushes the check valve 17 open from the discharge port 13 and enters the discharge cavity 14, and from there. It is discharged to the outside via the discharge pipe 83.
【0006】これと同時に、密閉ハウジング8の内底部
の油溜り81に貯留された潤滑油は油ポンプ51によっ
て吸い上げられ、この回転シャフト5に穿設された給油
孔52を通って上部軸受71、偏心ピン53、旋回軸受
73に供給され、これらを潤滑する。偏心ピン53及び
旋回軸受73を潤滑し又は穴55内を流過した潤滑油は
フレーム6の上面中央に形成されている室61に入り、
一部の潤滑油は室61からスラスト部65に穿設された
給油溝66内にその内側端から入り、この中を放射方向
に流れる過程で旋回スクロール2の公転旋回運動によ
り、スラスト部65に引き出されてスラスト部65を潤
滑する。そして、スラスト部65を潤滑し又は給油溝6
6を流過した潤滑油はスラスト部65の外周縁から流出
して自転阻止機構3を潤滑する。一方、室61に入った
余剰の潤滑油は排油通路62を通って排出され油溜り8
1に戻る。
At the same time, the lubricating oil stored in the oil sump 81 at the inner bottom of the sealed housing 8 is sucked up by the oil pump 51, passes through an oil supply hole 52 formed in the rotary shaft 5, and passes through the upper bearing 71, It is supplied to the eccentric pin 53 and the slewing bearing 73 to lubricate them. The lubricating oil lubricating the eccentric pin 53 and the slewing bearing 73 or flowing through the hole 55 enters a chamber 61 formed in the center of the upper surface of the frame 6,
Part of the lubricating oil enters the oil supply groove 66 formed in the thrust portion 65 from the chamber 61 from the inner end thereof, and flows through the oil supply groove 66 in the radial direction. It is pulled out to lubricate the thrust portion 65. Then, the thrust portion 65 is lubricated or the lubrication groove 6 is lubricated.
The lubricating oil flowing through 6 flows out from the outer peripheral edge of the thrust portion 65 to lubricate the rotation preventing mechanism 3. On the other hand, the surplus lubricating oil that has entered the chamber 61 is discharged through the oil drain passage 62 and the oil sump 8
Return to 1.
【0007】図7は図5のA−A断面の第2の例の部分
図である。この例は放射状に伸びる給油溝66が4本設
けられている例である。図8は図5のA−A断面の第3
の例の部分図である。この例は円環状の給油溝66Xが
穿設され、内周縁に位置する流入口66aと外周縁に位
置する排出口66bにそれぞれ通じている。
FIG. 7 is a partial view of a second example of the AA cross section of FIG. This example is an example in which four radially extending oil supply grooves 66 are provided. FIG. 8 is a third sectional view taken along the line AA in FIG.
It is a partial view of the example of FIG. In this example, an annular oil supply groove 66X is formed and communicates with an inflow port 66a located on the inner peripheral edge and a discharge port 66b located on the outer peripheral edge.
【0008】[0008]
【発明が解決しようとする課題】上記従来のスクロール
型流体機械においては、インバータ等で電動モータMを
介して回転シャフト5の回転速度を増減コントロールす
る場合、これに伴って油ポンプ51の吐出出力が変動す
る。このため、回転シャフト5の低速回転時にスラスト
部65に適量の潤滑油を供給できるようにこのスラスト
部65や排油通路等62の流路抵抗を設定しておくと、
高速回転時には油ポンプ51の吐出圧力が上昇するため
スラスト部65に潤滑油が過剰に供給され、この結果、
多量の潤滑油の飛沫が通路85及び吸入通路15を流れ
るガスに伴なわれて密閉空間24に吸入され易く油上が
り量(吐出ガスに含まれる潤滑油の量をいう)が増大す
る不具合があった。
In the conventional scroll type fluid machine described above, when the rotation speed of the rotary shaft 5 is controlled to increase or decrease via an electric motor M by an inverter or the like, the discharge output of the oil pump 51 is accordingly increased. Fluctuates. For this reason, if the flow path resistance of the thrust portion 65 and the oil drain passage 62 is set so that an appropriate amount of lubricating oil can be supplied to the thrust portion 65 when the rotating shaft 5 rotates at a low speed,
During high-speed rotation, the discharge pressure of the oil pump 51 increases, so that the lubricating oil is excessively supplied to the thrust portion 65, and as a result,
A large amount of lubricating oil droplets are easily sucked into the closed space 24 due to the gas flowing through the passage 85 and the suction passage 15, and the amount of oil rising (the amount of lubricating oil contained in the discharge gas) increases. Was.
【0009】一方、回転シャフト5の高速回転時に適量
給油できるようにスラスト部65等の流路抵抗を設定し
ておくと、低速回転時にはスラスト部65に十分な量の
潤滑油を供給できず潤滑不良を招く。
On the other hand, if the flow path resistance of the thrust portion 65 and the like is set so that an appropriate amount of oil can be supplied at the time of high-speed rotation of the rotary shaft 5, a sufficient amount of lubricating oil cannot be supplied to the thrust portion 65 at low-speed rotation, and lubrication cannot be performed. Inviting defects.
【0010】本発明は上記従来技術の欠点を解消し、回
転シャフトの回転数に関係なく、スラスト部に適量の潤
滑油が供給されるようにしようとするものである。
An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to supply an appropriate amount of lubricating oil to the thrust portion regardless of the rotation speed of the rotating shaft.
【0011】[0011]
【課題を解決するための手段】本発明は上記課題を解決
したものであって、固定スクロールと互に噛み合わせら
れる旋回スクロールを、フレームに形成されたスラスト
部に摺動可能に支持し、同旋回スクロールを駆動する回
転シャフトにその回転によって油溜り部から潤滑油を吸
い上げ吐出する油ポンプを備え、その吐出された潤滑油
を上記スラスト部に穿設された給油溝に供給し、余剰の
潤滑油を上記フレームに穿設された排油通路から排出し
て上記油溜り部へ戻すスクロール型流体機械において、
次の特徴を有するスクロール型流体機械に関するもので
ある。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a orbiting scroll which is engaged with a fixed scroll and which is slidably supported by a thrust portion formed on a frame. A rotary shaft that drives the orbiting scroll is provided with an oil pump that sucks up and discharges lubricating oil from an oil reservoir by the rotation thereof, and supplies the discharged lubricating oil to an oil supply groove formed in the thrust portion to generate excess lubrication. A scroll-type fluid machine that discharges oil from an oil drain passage formed in the frame and returns the oil to the oil reservoir,
The present invention relates to a scroll type fluid machine having the following features.
【0012】(1)上記排油通路に、弁体の上流側と下
流側の圧力差が所定値を上回った時開放される開閉弁装
置を設けたこと。 (2)上記スラスト部の給油溝は円環上に穿設されたも
のとし、上記排油通路に、弁体の上流側と下流側の圧力
差が所定値を上回った時開放される開閉弁装置を設け、
かつ、上記排油通路内の上記開閉弁装置の近傍上流側と
上記スラスト部の円環状の給油溝の流入口とを連通する
通孔を設けたこと。
(1) An on-off valve device which is opened when the pressure difference between the upstream side and the downstream side of the valve body exceeds a predetermined value is provided in the oil drain passage. (2) The oil supply groove of the thrust portion is formed in an annular shape, and the on-off valve is opened in the oil discharge passage when the pressure difference between the upstream side and the downstream side of the valve body exceeds a predetermined value. Equipment,
In addition, a through hole is provided for communicating between the upstream side near the opening and closing valve device in the oil drain passage and the inflow port of the annular oil supply groove of the thrust portion.
【0013】上記の(1)の開閉弁装置を設けたものに
ついては、回転シャフトが高速回転で駆動されて油ポン
プの吐出圧力が高く弁体の上流側と下流側との圧力差が
所定値を上回った場合には、開閉弁は排油通路を開放し
て潤滑油を排出し、これによりスラスト部への給油量を
低下させる。逆に、回転シャフトが低速回転で駆動され
て油ポンプの吐出圧力が低く弁体の上流側と下流側との
圧力差が所定値を下回った場合には、開閉弁は排油通路
を閉止し、これによりスラスト部への給油量を増加させ
る。
In the apparatus provided with the opening / closing valve device of the above (1), the rotary shaft is driven at high speed, the discharge pressure of the oil pump is high, and the pressure difference between the upstream side and the downstream side of the valve body is a predetermined value. Is exceeded, the on-off valve opens the oil discharge passage to discharge the lubricating oil, thereby reducing the amount of oil supplied to the thrust portion. Conversely, when the rotary shaft is driven at low speed and the discharge pressure of the oil pump is low and the pressure difference between the upstream side and the downstream side of the valve body falls below a predetermined value, the on-off valve closes the oil discharge passage. Thus, the amount of oil supplied to the thrust portion is increased.
【0014】また、上記の(2)の開閉弁装置と通孔を
設けたものについては、潤滑油は排油通路の開閉弁装置
の近傍上流側から通孔を通りスラスト部の円環状の給油
溝の流入口に供給される。回転シャフトが低速回転で駆
動されて油ポンプの吐出圧力が低く排油通路内が所定圧
力を下回っている間にあっては、開閉弁は閉止されてい
るため給油溝の流入口の圧力は排油通路内とほぼ同じ圧
力に維持される。回転数が増すにつれて圧力は所定圧力
まで上昇する。回転シャフトが高速回転で駆動されて油
ポンプの吐出圧力が高くなると、開閉弁が開放されて潤
滑油の一部が排出されることにより排油通路の圧力が所
定圧力まで降下する。このため、排油通路の開閉弁装置
の近傍上流側から通孔を通りその潤滑油が供給される給
油溝の流入口の圧力も所定圧力に維持される。
In the case of the above (2) in which the on-off valve device and the through-hole are provided, the lubricating oil passes through the through-hole from the upstream side near the on-off valve device of the oil discharge passage, and has an annular oil supply in the thrust portion. It is supplied to the inlet of the groove. While the rotating shaft is driven at a low speed and the discharge pressure of the oil pump is low and the pressure inside the oil discharge passage is lower than a predetermined pressure, the pressure at the inlet of the oil supply groove is reduced by the oil supply passage because the on-off valve is closed. It is maintained at almost the same pressure as inside. As the rotation speed increases, the pressure increases to a predetermined pressure. When the rotating shaft is driven at high speed and the discharge pressure of the oil pump increases, the on-off valve is opened and a part of the lubricating oil is discharged, so that the pressure in the oil discharge passage drops to a predetermined pressure. For this reason, the pressure at the inlet of the oil supply groove through which the lubricating oil is supplied through the through hole from the upstream side near the on-off valve device of the oil discharge passage is also maintained at the predetermined pressure.
【0015】[0015]
【発明の実施の形態】図1は本発明の実施の第1形態に
係るスクロール型流体機械の部分的縦断面図である。こ
れは従来技術の第2の例(図5,図7)を改良したもの
であり、従来技術と同じ部材には同じ符号が付してあ
る。図において、90は排油通路62の出口に取付けら
れている開閉弁装置である。これは次に述べる部材91
〜94からなっている。91は取付用のボルト、92は
同ボルトによってフレーム6に固定されているバネ受
け、93は排油通路62を開閉する弁体、94はバネ受
け92と弁体93との間に介装され弁体93を押圧する
コイルスプリングである。上記以外の部分は従来技術と
同じである。
FIG. 1 is a partial longitudinal sectional view of a scroll type fluid machine according to a first embodiment of the present invention. This is an improvement on the second example of the prior art (FIGS. 5 and 7), and the same members as those in the prior art are denoted by the same reference numerals. In the figure, reference numeral 90 denotes an opening / closing valve device attached to the outlet of the oil drain passage 62. This is a member 91 described below.
~ 94. Reference numeral 91 denotes a mounting bolt, 92 denotes a spring receiver fixed to the frame 6 by the bolt, 93 denotes a valve body that opens and closes the oil discharge passage 62, and 94 denotes a valve body that is interposed between the spring receiver 92 and the valve body 93. This is a coil spring that presses the valve element 93. The other parts are the same as in the prior art.
【0016】弁体93には、同弁体の上流側すなわち室
61内の圧力及び同弁体の下流側すなわち密閉ハウジン
グ8内の圧力との圧力差に基づく力と、コイルスプリン
グ94に基づく力とによって荷重が負荷されるようにな
っている。そして、この開閉弁装置90は弁体93の上
流側の圧力と下流側の圧力との圧力差が所定値を上回っ
たとき排油通路62を開放するとともにこの所定値を下
回ったとき排油通路62を閉鎖するようにその作動条件
が設定されている。ここに、所定の圧力差とはスラスト
部65に適量の潤滑油を供給するために必要な圧力差で
ある。
The valve 93 has a force based on a pressure difference between an upstream side of the valve body, that is, the pressure in the chamber 61 and a downstream side of the valve body, that is, a pressure in the closed housing 8, and a force based on a coil spring 94. Thus, a load is applied. The on-off valve device 90 opens the oil discharge passage 62 when the pressure difference between the pressure on the upstream side and the pressure on the downstream side of the valve element 93 exceeds a predetermined value, and opens the oil discharge passage 62 when the pressure difference falls below the predetermined value. The operating condition is set so as to close 62. Here, the predetermined pressure difference is a pressure difference necessary for supplying an appropriate amount of lubricating oil to the thrust portion 65.
【0017】本装置において、回転シャフト5が高速回
転で駆動されて油ポンプ51の吐出圧力が高くなり弁体
の上流側と下流側との圧力差が所定値を上回った場合に
は、開閉弁装置90は排油通路62を開放して潤滑油を
排出し、これによりスラスト部65への給油量を低下さ
せる。一方、回転シャフト5が低速回転で駆動されて油
ポンプ51の吐出圧力が低くなり弁体の上流側と下流側
との圧力差が所定値を下回った場合には、開閉弁装置9
0は排油通路62を閉止し、これによりスラスト部65
への給油量を増加させる。
In this apparatus, when the rotary shaft 5 is driven at a high speed and the discharge pressure of the oil pump 51 becomes high and the pressure difference between the upstream side and the downstream side of the valve body exceeds a predetermined value, the opening / closing valve is opened. The device 90 opens the oil discharge passage 62 to discharge the lubricating oil, thereby reducing the amount of oil supplied to the thrust portion 65. On the other hand, when the rotary shaft 5 is driven at a low speed and the discharge pressure of the oil pump 51 decreases and the pressure difference between the upstream side and the downstream side of the valve body falls below a predetermined value, the on-off valve device 9
0 closes the oil drain passage 62 and thereby the thrust portion 65
Increase the amount of refueling.
【0018】本実施の第1形態によれば、回転シャフト
の回転数の変化に伴う油ポンプの吐出圧力の増減によっ
て、弁体の上流側と下流側との圧力差が所定値を上回っ
た場合、または下回った場合に開閉弁装置を介して排油
通路を開閉するようにしたので、回転シャフトの高速回
転時及び低速回転時にもスラスト部に適量の潤滑油を供
給することができ、この結果、スラスト部の潤滑不良を
回避できるとともに油上がり量を低減でき信頼性の高い
圧縮機を提供することができる。
According to the first embodiment, when the pressure difference between the upstream side and the downstream side of the valve body exceeds a predetermined value due to the increase or decrease of the discharge pressure of the oil pump due to the change in the rotation speed of the rotary shaft. , Or when it falls below, the oil drain passage is opened and closed via the on-off valve device, so that an appropriate amount of lubricating oil can be supplied to the thrust portion even during high-speed rotation and low-speed rotation of the rotating shaft. In addition, it is possible to provide a highly reliable compressor that can avoid poor lubrication of the thrust portion and reduce the amount of oil rise.
【0019】図2は本発明の実施の第2形態に係るスク
ロール型流体機械の部分的縦断面図、図3は同実施の形
態のスラスト部の平面図である。これは従来技術の第3
の例(図5,図8)を改良したものであり、従来技術と
同じ部材には同じ符号が付してある。図において、排油
通路62の出口には前述の実施の第1形態におけるもの
と同一型式の開閉弁装置90が取付けられている。すな
わち、開閉弁装置90はフレーム6にボルト91によっ
て固定されたバネ受け92と排油通路62を開閉する弁
体93及びバネ受け92と弁体93との間に介装され弁
体93を押圧するコイルスプリング94とからなり、弁
体93には、室61内の圧力と密閉ハウジング8内空間
の圧力との差に基づく力と、コイルスプリング94に基
づく力とによって荷重を負荷するようになっている。そ
して、弁体の上流側と下流側の圧力差が判定値を上回っ
たとき開放するとともに、所定値を下回ったとき閉止す
るように設定されている。
FIG. 2 is a partial longitudinal sectional view of a scroll type fluid machine according to a second embodiment of the present invention, and FIG. 3 is a plan view of a thrust portion of the embodiment. This is the third of the prior art.
(FIGS. 5 and 8) are improved, and the same members as those in the prior art are denoted by the same reference numerals. In the figure, an opening / closing valve device 90 of the same type as that in the first embodiment is attached to the outlet of the oil drain passage 62. That is, the opening / closing valve device 90 is interposed between the spring receiver 92 fixed to the frame 6 by the bolt 91 and the valve body 93 that opens and closes the oil discharge passage 62 and between the spring receiver 92 and the valve body 93 to press the valve body 93. A load is applied to the valve body 93 by a force based on the difference between the pressure in the chamber 61 and the pressure in the space inside the closed housing 8 and a force based on the coil spring 94. ing. The valve is opened when the pressure difference between the upstream side and the downstream side of the valve element exceeds a determination value, and closed when the pressure difference falls below a predetermined value.
【0020】また、スラスト部65には円環状の給油溝
66Xが穿設されている。この給油溝66Xの流入口6
6aはスラスト部65内に位置し、フレーム6に穿設さ
れた通孔67を介して排油通路62に連通している。潤
滑油は排油通路62から通孔67を通って流入口66a
より給油溝66Xに供給されるようになっている。この
部分の構造は従来技術(図8)とは異っている。ここ
に、排油通路62側の通孔67の一端を開閉弁装置90
の近傍上流側に配置し、流入口66aを極力開閉弁装置
90に近づけることによって、流入口66aの圧力を開
閉弁装置90の位置の圧力と同等にすることが望まし
い。他の構成は図5及び図8において示した従来のもの
と同様である。
An annular oil supply groove 66X is formed in the thrust portion 65. Inflow port 6 of this oil supply groove 66X
6 a is located in the thrust portion 65 and communicates with the oil drain passage 62 through a through hole 67 formed in the frame 6. The lubricating oil flows from the oil drain passage 62 through the through hole 67 to the inlet 66a.
The oil is supplied to the oil supply groove 66X. The structure of this part is different from the prior art (FIG. 8). Here, one end of the through hole 67 on the oil drain passage 62 side is connected to the on-off valve device 90.
It is desirable that the pressure at the inlet 66a be equal to the pressure at the position of the on-off valve device 90 by disposing the inlet 66a as close to the on-off valve device 90 as possible. The other configuration is the same as the conventional one shown in FIG. 5 and FIG.
【0021】本装置において、スラスト部65の流入口
66aの圧力Pは回転シャフト5の回転数Rに対して図
4に示すように変化する。即ち、回転シャフト5が低速
回転で駆動されて油ポンプ51の吐出圧力が低く排油通
路62内が所定圧力Poを下回っている間にあっては、
開閉弁装置90は閉止されているため流入口66aの圧
力Pは排油通路62内とほぼ同じ圧力に維持され、回転
数Rが増すにつれて所定圧力Poまで上昇する。そし
て、この低速回転時における流入口66aの圧力Pの下
でスラスト部65に適量の潤滑油を供給できるようにこ
のスラスト部65や排油通路62等の流路抵抗を設定し
ておく。
In this apparatus, the pressure P at the inflow port 66a of the thrust portion 65 changes as shown in FIG. That is, while the rotation shaft 5 is driven at low speed and the discharge pressure of the oil pump 51 is low and the inside of the oil discharge passage 62 is lower than the predetermined pressure Po,
Since the on-off valve device 90 is closed, the pressure P at the inlet 66a is maintained at substantially the same pressure as that in the oil drain passage 62, and increases to a predetermined pressure Po as the rotation speed R increases. The flow path resistance of the thrust portion 65 and the oil discharge passage 62 is set so that an appropriate amount of lubricating oil can be supplied to the thrust portion 65 under the pressure P of the inflow port 66a during the low-speed rotation.
【0022】一方、回転シャフト5が高速回転で駆動さ
れて油ポンプ51の吐出圧力が高くなり排油通路62内
が所定圧力Poを上回ると、開閉弁装置90が開放され
て潤滑油の一部が排出されることによりこの装置の圧力
が所定圧力Poまで降下する。このため、流入口66a
の圧力Pはほぼ所定圧力Poに維持される。かくして、
回転シャフト5の回転数が変更されて油ポンプ51の吐
出圧力が上昇し又は降下した場合にも流入口66aの圧
力Pは所定圧力Po以下に維持調整される。従って、回
転シャフト5の低速回転時及び高速回転時においてもス
ラスト部65の給油溝66Xには適量の潤滑油が供給さ
れる。
On the other hand, when the rotary shaft 5 is driven at a high speed to increase the discharge pressure of the oil pump 51 and the inside of the oil discharge passage 62 exceeds a predetermined pressure Po, the on-off valve device 90 is opened and a part of the lubricating oil is opened. Is discharged, the pressure of the device drops to a predetermined pressure Po. For this reason, the inlet 66a
Is maintained substantially at a predetermined pressure Po. Thus,
Even when the rotation speed of the rotary shaft 5 is changed and the discharge pressure of the oil pump 51 rises or falls, the pressure P at the inlet 66a is maintained and adjusted to be equal to or lower than the predetermined pressure Po. Therefore, an appropriate amount of lubricating oil is supplied to the oil supply groove 66 </ b> X of the thrust portion 65 even when the rotating shaft 5 rotates at low speed and at high speed.
【0023】本実施の第2形態によれば、排油通路にこ
の排油通路内が所定圧力を上回ったとき開放する開閉弁
装置を設け、この開閉弁装置の近傍に位置した排油通路
とスラスト部内に位置した流入口とを連通する通孔を設
けたため、回転シャフトの回転数の変化に伴って油ポン
プの吐出圧力が上昇し又は降下した場合にもスラスト部
の流入口圧力を所定圧力以下に維持調整することができ
るので、回転シャフトの低速回転時及び高速回転時にお
いてもスラスト部に適量の潤滑油を供給することができ
る。この結果、潤滑不良を回避できるとともに油上がり
量を低減でき、信頼性の高い圧縮機を提供することがで
きる。
According to the second embodiment, the oil discharge passage is provided with an opening / closing valve device that opens when the pressure inside the oil discharging passage exceeds a predetermined pressure. Since the through hole communicating with the inflow port located in the thrust section is provided, the inflow pressure of the thrust section is maintained at a predetermined pressure even when the discharge pressure of the oil pump rises or falls with a change in the rotation speed of the rotating shaft. Since the following adjustment can be performed, an appropriate amount of lubricating oil can be supplied to the thrust portion even when the rotating shaft is rotating at a low speed and at a high speed. As a result, poor lubrication can be avoided, the amount of oil rise can be reduced, and a highly reliable compressor can be provided.
【0024】[0024]
【発明の効果】本発明のスクロール型流体機械において
は、排油通路に、弁体の上流側と下流側の圧力差が所定
値を上回った時開放される開閉弁装置を設けてあり、あ
るいは排油通路に、弁体の上流側と下流側の圧力差が所
定値を上回った時開放される開閉弁装置を設けると共
に、上記排油通路内の上記開閉弁装置の近傍上流側とス
ラスト部の円環状の給油溝の流入口とを連通する通孔を
設けてあるので、回転シャフトの回転数に関係なく、ス
ラスト部に適量の潤滑油を供給することができる。
In the scroll type fluid machine according to the present invention, the oil drain passage is provided with an opening / closing valve device which is opened when the pressure difference between the upstream side and the downstream side of the valve body exceeds a predetermined value. An opening / closing valve device that is opened when a pressure difference between the upstream side and the downstream side of the valve body exceeds a predetermined value, and an upstream side near the opening / closing valve device in the oil discharge passage and a thrust portion; Since a through hole communicating with the inflow port of the annular oil supply groove is provided, an appropriate amount of lubricating oil can be supplied to the thrust portion regardless of the rotation speed of the rotating shaft.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施の第1形態に係るスクロール型流
体機械の部分的縦断面図。
FIG. 1 is a partial longitudinal sectional view of a scroll type fluid machine according to a first embodiment of the present invention.
【図2】本発明の実施の第2形態に係るスクロール型流
体機械の部分的縦断面図。
FIG. 2 is a partial longitudinal sectional view of a scroll type fluid machine according to a second embodiment of the present invention.
【図3】実施の第2形態のスラスト部の平面図。FIG. 3 is a plan view of a thrust portion according to a second embodiment.
【図4】実施の第2形態の回転シャフトの回転数に対す
る圧力特性を示す図。
FIG. 4 is a diagram illustrating pressure characteristics with respect to the number of rotations of a rotating shaft according to a second embodiment.
【図5】従来のスクロール型流体機械の縦断面図。FIG. 5 is a vertical sectional view of a conventional scroll type fluid machine.
【図6】同流体機械のスラスト部の第1の例の平面図。FIG. 6 is a plan view of a first example of a thrust portion of the fluid machine.
【図7】同流体機械のスラスト部の第2の例の平面図。FIG. 7 is a plan view of a second example of the thrust portion of the fluid machine.
【図8】同流体機械のスラスト部の第3の例の平面図。FIG. 8 is a plan view of a third example of a thrust portion of the fluid machine.
【符号の説明】[Explanation of symbols]
1 固定スクロール 2 旋回スクロール 5 回転シャフト 6 フレーム 8 密閉ハウジング 51 油ポンプ 52 給油孔 61 室 62 排油通路 65 スラスト部 66 放射状の給油溝 66X 円環状の給油溝 66a 流入口 66b 排出口 67 通孔 90 開閉弁装置 92 バネ受け 93 弁体 94 コイルスプリング DESCRIPTION OF SYMBOLS 1 Fixed scroll 2 Orbiting scroll 5 Rotating shaft 6 Frame 8 Sealed housing 51 Oil pump 52 Oil supply hole 61 Chamber 62 Oil discharge passage 65 Thrust portion 66 Radial oil supply groove 66X Annular oil supply groove 66a Inlet 66b Discharge port 67 Through hole 90 Opening / closing valve device 92 Spring receiver 93 Valve element 94 Coil spring

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 固定スクロールと互に噛み合わせられる
    旋回スクロールを、フレームに形成されたスラスト部に
    摺動可能に支持し、同旋回スクロールを駆動する回転シ
    ャフトにその回転によって油溜り部から潤滑油を吸い上
    げ吐出する油ポンプを備え、その吐出された潤滑油を上
    記スラスト部に穿設された給油溝に供給し、余剰の潤滑
    油を上記フレームに穿設された排油通路から排出して上
    記油溜り部へ戻すスクロール型流体機械において、上記
    排油通路に、弁体の上流側と下流側の圧力差が所定値を
    上回った時開放される開閉弁装置を設けたことを特徴と
    するスクロール型流体機械。
    An orbiting scroll meshed with a fixed scroll is slidably supported on a thrust portion formed on a frame, and a rotary shaft for driving the orbiting scroll is rotated by a rotation shaft so that lubricating oil flows from an oil reservoir. An oil pump that sucks and discharges the oil, supplies the discharged lubricating oil to an oil supply groove formed in the thrust portion, and discharges the surplus lubricating oil from a drain oil passage formed in the frame. In a scroll type fluid machine returning to an oil sump, a scroll valve is provided in the oil discharge passage, the valve being opened when a pressure difference between an upstream side and a downstream side of a valve body exceeds a predetermined value. Type fluid machinery.
  2. 【請求項2】 固定スクロールと互に噛み合わせられる
    旋回スクロールを、フレームに形成されたスラスト部に
    摺動可能に支持し、同旋回スクロールを駆動する回転シ
    ャフトにその回転によって油溜り部から潤滑油を吸い上
    げ吐出する油ポンプを備え、その吐出された潤滑油を上
    記スラスト部に穿設された円環状の給油溝に供給し、余
    剰の潤滑油を上記フレームに穿設された排油通路から排
    出して上記油溜り部へ戻すスクロール型流体機械におい
    て、上記排油通路に、弁体の上流側と下流側の圧力差が
    所定値を上回った時開放される開閉弁装置を設け、か
    つ、上記スラスト部の円環状の給油溝の流入口に開口
    し、上記排油通路内の上記開閉弁装置の上流側と上記円
    環状の給油溝とを連通する通孔を同開閉弁装置の近傍に
    位置して設けたことを特徴とするスクロール型流体機
    械。
    2. A rotary scroll, which meshes with a fixed scroll, is slidably supported on a thrust portion formed on a frame, and is rotated by a rotary shaft driving the rotary scroll from an oil sump portion to a lubricating oil. An oil pump that sucks and discharges the oil, supplies the discharged lubricating oil to an annular oil supply groove formed in the thrust portion, and discharges excess lubricating oil from an oil discharge passage formed in the frame. In the scroll-type fluid machine returning to the oil reservoir, the oil discharge passage is provided with an opening / closing valve device that is opened when a pressure difference between an upstream side and a downstream side of the valve body exceeds a predetermined value, and An opening is formed at the inlet of the annular oil supply groove of the thrust portion, and a through hole communicating the upstream side of the on-off valve device and the annular oil supply groove in the oil discharge passage is located near the on-off valve device. Specially Scroll type fluid machinery.
JP17672299A 1999-06-23 1999-06-23 Scroll type fluid machine Expired - Lifetime JP3207825B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17672299A JP3207825B2 (en) 1999-06-23 1999-06-23 Scroll type fluid machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17672299A JP3207825B2 (en) 1999-06-23 1999-06-23 Scroll type fluid machine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP4124658A Division JP2989375B2 (en) 1992-05-18 1992-05-18 Scroll type fluid machine

Publications (2)

Publication Number Publication Date
JP2000027776A true JP2000027776A (en) 2000-01-25
JP3207825B2 JP3207825B2 (en) 2001-09-10

Family

ID=16018644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17672299A Expired - Lifetime JP3207825B2 (en) 1999-06-23 1999-06-23 Scroll type fluid machine

Country Status (1)

Country Link
JP (1) JP3207825B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007332974A (en) * 2007-09-10 2007-12-27 Daikin Ind Ltd Fluid machinery
KR101597743B1 (en) 2015-11-12 2016-02-25 (주)경성하이테크 Oil pressure equipment control system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5341819B2 (en) * 2010-05-18 2013-11-13 サンデン株式会社 Scroll type fluid machinery
KR101828211B1 (en) * 2017-05-29 2018-02-12 이승우 Repairing agent of injector grouting for repairing crack of concrete structure and apparatus of repairing using the composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007332974A (en) * 2007-09-10 2007-12-27 Daikin Ind Ltd Fluid machinery
JP4626635B2 (en) * 2007-09-10 2011-02-09 ダイキン工業株式会社 Fluid machinery
KR101597743B1 (en) 2015-11-12 2016-02-25 (주)경성하이테크 Oil pressure equipment control system

Also Published As

Publication number Publication date
JP3207825B2 (en) 2001-09-10

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