JP2712797B2 - Oil supply mechanism for compressor - Google Patents

Oil supply mechanism for compressor

Info

Publication number
JP2712797B2
JP2712797B2 JP2249735A JP24973590A JP2712797B2 JP 2712797 B2 JP2712797 B2 JP 2712797B2 JP 2249735 A JP2249735 A JP 2249735A JP 24973590 A JP24973590 A JP 24973590A JP 2712797 B2 JP2712797 B2 JP 2712797B2
Authority
JP
Japan
Prior art keywords
oil
passage
drive shaft
amount
oil supply
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 - Fee Related
Application number
JP2249735A
Other languages
Japanese (ja)
Other versions
JPH04128586A (en
Inventor
亀一 水谷
正晟 泉
健次郎 林
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 JP2249735A priority Critical patent/JP2712797B2/en
Publication of JPH04128586A publication Critical patent/JPH04128586A/en
Application granted granted Critical
Publication of JP2712797B2 publication Critical patent/JP2712797B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02Lubrication; Lubricant separation
    • F04C29/021Control systems for the circulation of the lubricant

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、回転数を可変とし、主にスクロールタイプ
の圧縮機に適した給油機構に関する。
Description: TECHNICAL FIELD The present invention relates to a refueling mechanism which makes the number of rotations variable and is suitable mainly for a scroll type compressor.

(従来の技術) 従来、特開平2−45686号公報に開示され且つ第4図
に概略示するように、固定スクロール(F)及び可動ス
クロール(O)をもつスクロールタイプの圧縮要素
(C)を、エンジン等の外部駆動源で駆動される駆動軸
(D)並びにこれに連動されるスイングリンク(S)を
介して駆動し、前記駆動軸(D)の内部に油ポンプ
(P)から延びる給油通路(T)を設けると共に、前記
駆動軸(D)の軸端部に、該軸端部からの開放油量を規
制するオリフィス(A)を介装して、該オリフィス
(A)で規制される所定量の油を、前記スイングリンク
(S)と可動スクロール(O)との間のボス部軸受
(R)や可動スクロール(O)のスラスト軸受(B)並
びに圧縮室(E)に供給し、前記各軸受(R)(B)の
潤滑や前記圧縮室(E)内のシール等が行えるようにし
ている。尚、前記圧縮室(E)から高圧の吐出室(H)
に流出した油は油戻し通路を介して低圧の油溜(L)に
戻すようにしている。
(Prior Art) Conventionally, as disclosed in JP-A-2-45686 and schematically shown in FIG. 4, a scroll-type compression element (C) having a fixed scroll (F) and a movable scroll (O) is used. , Which is driven via a drive shaft (D) driven by an external drive source such as an engine and a swing link (S) interlocked therewith, and which extends from an oil pump (P) into the drive shaft (D) A passage (T) is provided, and an orifice (A) for regulating the amount of oil released from the shaft end is provided at the shaft end of the drive shaft (D), and is regulated by the orifice (A). A predetermined amount of oil is supplied to the boss bearing (R) between the swing link (S) and the movable scroll (O), the thrust bearing (B) of the movable scroll (O), and the compression chamber (E). Lubrication of the bearings (R) and (B) and the compression chamber (E) Seal or the like is to allow the. The high pressure discharge chamber (H) from the compression chamber (E).
Is returned to the low-pressure oil reservoir (L) via the oil return passage.

(発明が解決しようとする課題) しかし、以上のものでは、駆動軸(D)の軸端部から
開放する油量を単一のオリフィス(A)のみで規制する
ようにしているから、該オリフィス(A)の口径を、油
ポンプ(P)による汲上げ油量が増大する高速回転時に
対応して小さく設定していると、低速回転時、油ポンプ
(P)の汲上げ油量の減少に伴い、前記オリフィス
(A)からの開放油量が減り、各軸受(R)(B)で十
分な潤滑が行えないと共に、圧縮室(E)内のシール性
が損なわれ、又、圧縮室(E)の注入油量の減少に伴い
吐出室(H)からの戻し油量が極端に減り、油戻り通路
を介して低圧の油溜(L)に吐出ガスが漏れ、性能の低
下を招く問題が起こる。
(Problems to be Solved by the Invention) However, in the above, the amount of oil released from the shaft end of the drive shaft (D) is restricted only by the single orifice (A). If the diameter of (A) is set to be small corresponding to the high-speed rotation at which the pumping oil amount by the oil pump (P) increases, the pumping oil amount of the oil pump (P) decreases at the low-speed rotation. Accordingly, the amount of oil released from the orifice (A) is reduced, and sufficient lubrication cannot be performed in each of the bearings (R) and (B), and the sealing performance in the compression chamber (E) is impaired. E) The return oil amount from the discharge chamber (H) decreases extremely with the decrease of the injected oil amount, and the discharge gas leaks into the low-pressure oil reservoir (L) through the oil return passage, resulting in a decrease in performance. Happens.

一方、前記オリフィス(A)の口径を、油ポンプ
(P)からの汲上げ油量が減少する低速回転時に対応し
て大きく設定すると、高速回転時に、前記駆動軸(D)
から開放される油量が過剰になり、圧縮室(E)に注入
される油量が必要以上に増えて、吐出室(H)に流出す
る油量が油戻し能力を越えて増大し、吐出管を通じて外
部に流出する油量が増えて油溜(L)の油が減少し、所
謂油上がりの問題が起こる。
On the other hand, if the diameter of the orifice (A) is set to be large corresponding to a low-speed rotation in which the amount of pumping oil from the oil pump (P) decreases, the drive shaft (D) will be in a high-speed rotation.
The amount of oil released from the pressure chamber becomes excessive, the amount of oil injected into the compression chamber (E) increases more than necessary, and the amount of oil flowing out to the discharge chamber (H) exceeds the oil return capacity and increases. The amount of oil flowing out to the outside through the pipe increases, and the amount of oil in the oil sump (L) decreases.

従って、上記従来例のように一つのオリフィス(A)
のみで給油量を規制していたのでは、高速回転時及び低
速回転時何れも満足する適正な給油を行うことができな
い問題がある。
Therefore, one orifice (A) as in the above-mentioned conventional example is used.
If the amount of lubrication is restricted only by the above method, there is a problem that it is not possible to perform appropriate lubrication satisfying both the high-speed rotation and the low-speed rotation.

本発明の目的は、低速回転時と高速回転時とで開放油
量を変更できるようにして、回転数に応じた適正な給油
が行える圧縮機の給油機構を提供する点にある。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a compressor oil supply mechanism capable of changing an open oil amount between a low-speed rotation and a high-speed rotation, and capable of performing appropriate lubrication according to the number of rotations.

(課題を解決するための手段) そこで、本発明では、上記目的を達成するため、圧縮
要素(1)を駆動する駆動軸(2)の内部に、一回転毎
の汲上げ油量が定量となる定容量式の油ポンプ(3)か
ら延びる給油通路(4)を備え、駆動軸(2)の軸端部
から開放する油を給油部に供給するようにした圧縮機の
給油機構において、駆動軸(2)の軸端部に、給油通路
(4)に連通する油注入主通路(5)と該主通路(5)
を迂回する補助通路(6)とを設けると共に、駆動軸
(2)の軸端部軸心上に、主通路(5)および補助通路
(6)に連通する規制通路(85)が内部に設けられ駆動
軸(2)の軸方向に移動可能な油量調節弁(8)ならび
に駆動軸(2)の回転数の増加に基づく遠心力の増大に
より該駆動軸(2)の軸心に対し放射状に変位すること
により油量調節弁(8)を軸方向に移動させる複数の変
位手段(7)を備え、低速回転時には、規制通路(85)
から主通路(5)および補助通路(6)を介して給油部
に油を開放し、高速回転時には、変位手段(7)の変位
により油量調節弁(8)を軸方向に移動させて規制通路
(85)と補助通路(6)との連通を遮断して、規制通路
(85)から主通路(5)を介して給油部に油を開放し、
規制通路(85)の開口面積は、低速回転時の油量を決め
る大きさに、主通路(5)の開口面積は、規制通路(8
5)よりも小さく、高速回転時に油量を決める大きさに
それぞれ設定した。
(Means for Solving the Problems) Therefore, in the present invention, in order to achieve the above object, the amount of pumped oil per rotation is quantitatively determined inside a drive shaft (2) for driving the compression element (1). In a compressor oil supply mechanism provided with an oil supply passage (4) extending from a constant displacement oil pump (3), the oil being released from the shaft end of the drive shaft (2) is supplied to an oil supply unit. At the shaft end of the shaft (2), an oil injection main passage (5) communicating with the oil supply passage (4) and the main passage (5).
And a restriction passage (85) communicating with the main passage (5) and the auxiliary passage (6) is provided inside the shaft end of the drive shaft (2). The oil amount control valve (8) movable in the axial direction of the drive shaft (2) and the centrifugal force that increases due to the increase in the rotation speed of the drive shaft (2) radiate with respect to the axis of the drive shaft (2). A plurality of displacement means (7) for moving the oil amount adjusting valve (8) in the axial direction by displacing the oil amount adjusting valve (8).
The oil is released to the oil supply section through the main passage (5) and the auxiliary passage (6), and at the time of high-speed rotation, the displacement of the displacement means (7) moves the oil amount adjustment valve (8) in the axial direction to regulate the oil amount. The communication between the passage (85) and the auxiliary passage (6) is interrupted, and oil is released from the restriction passage (85) to the oil supply unit via the main passage (5).
The opening area of the restriction passage (85) is large enough to determine the amount of oil during low-speed rotation, and the opening area of the main passage (5) is
5) It was set to a size that was smaller than that of the above and determined the amount of oil during high-speed rotation.

(作用) 低速回転時、遠心力の減少に伴い、油量調節弁(8)
により補助通路(6)が開かれ、油注入主通路(5)と
前記補助通路(6)との2つの経路を介して規制通路
(85)の開口面積で決まる量の油が開放され、給油量の
減少を補って必要油量を確保できると共に、高速回転
時、遠心力の増大に伴い、油量調節弁(8)により補助
通路(6)が遮断され、油注入主通路(5)のみを介し
て該主通路(5)の開口面積で決まる量の油が開放さ
れ、開放油量を抑制して過剰給油を防止できる。これら
低油圧時と高油圧時との通路の切換に際し、遠心力によ
り油量調節弁(8)を変位させているが、該油量調節弁
(8)は駆動軸(2)の軸心上に、変位手段(7)は複
数を放射状に配置しているから、駆動軸(2)の回転バ
ランスを狂わせることもない。
(Operation) At low speed rotation, with the decrease of centrifugal force, the oil amount adjustment valve (8)
, The auxiliary passage (6) is opened, and the amount of oil determined by the opening area of the regulating passage (85) is released through two paths of the oil injection main passage (5) and the auxiliary passage (6). The required oil amount can be secured by compensating for the decrease in the oil amount, and at the time of high-speed rotation, the auxiliary passage (6) is shut off by the oil amount adjustment valve (8) with the increase in centrifugal force, and only the oil injection main passage (5) The amount of oil determined by the opening area of the main passage (5) is released through the opening, and the amount of released oil can be suppressed to prevent excessive oil supply. In switching the passage between the low hydraulic pressure and the high hydraulic pressure, the oil amount adjusting valve (8) is displaced by the centrifugal force, and the oil amount adjusting valve (8) is displaced above the axis of the drive shaft (2). In addition, since a plurality of displacement means (7) are arranged radially, the rotational balance of the drive shaft (2) is not disturbed.

(実施例) 第3図に示すものは、横型開放タイプのスクロール圧
縮機であって、横形ケーシング(9)の内部に、固定ス
クロール(11)と可動スクロール(12)とをもつ圧縮要
素(1)の内装しており、駆動軸(2)の一側を前記ケ
ーシング(9)の外部に突出させて、その突出端にエン
ジン等の外部駆動源に接続されるプーリ(20)を取り付
け、20〜70Hz程度の可変速範囲内で運転を行うようにし
ている。
(Embodiment) FIG. 3 shows a horizontal open type scroll compressor in which a compression element (1) having a fixed scroll (11) and a movable scroll (12) inside a horizontal casing (9). ), One side of the drive shaft (2) is protruded to the outside of the casing (9), and a pulley (20) connected to an external drive source such as an engine is attached to the protruding end thereof. Operation is performed within a variable speed range of about 70 Hz.

前記駆動軸(2)の回転は、軸端部に一体化するカウ
ンタウエイト(21)、及びその端面に突設するドライブ
ピン(22)に嵌合され且つリミットピン(23)により一
定範囲の揺動を可能にしたスイングリンク(24)を介し
て可動スクロール(12)に伝達される。又、可動スクロ
ール(12)の自転は、該スクロールとハウジング(90)
とに係合するキー(図示せず)をもつオルダムリング
(25)により阻止される。全体の回転バランスは、駆動
軸(2)に結合するバランスウエイト(26)により保持
される。
The rotation of the drive shaft (2) is fitted to a counterweight (21) integrated with the shaft end and a drive pin (22) protruding from the end surface thereof and is swung within a certain range by a limit pin (23). It is transmitted to the movable scroll (12) via a swing link (24) that enables movement. Further, the rotation of the movable scroll (12) is controlled by rotating the movable scroll (12) with the housing (90).
And is blocked by an Oldham ring (25) having a key (not shown) that engages The overall rotational balance is maintained by balance weights (26) connected to the drive shaft (2).

こうして、前記可動スクロール(12)を固定スクロー
ル(11)に対し公転駆動させ、吸入管(91)からケーシ
ング(9)の内部に取込む低圧ガスを、各スクロール
(11)(12)間に画成する圧縮室(13)で圧縮し、高圧
ガスを、吐出穴(14)から吐出室(15)に開放して油分
離器(16)を通過させた後、吐出管(92)から外部に取
出すようにしている。
In this way, the orbiting scroll (12) is revolved with respect to the fixed scroll (11), and the low-pressure gas taken into the casing (9) from the suction pipe (91) is divided between the scrolls (11) and (12). The high-pressure gas is compressed in the compression chamber (13) formed, and the high-pressure gas is released from the discharge hole (14) to the discharge chamber (15) and passed through the oil separator (16). I'm trying to take it out.

一方、前記駆動軸(2)の軸心には油ポンプ(3)か
ら延びる給油通路(4)を備え、主軸受(41)に給油す
ると共に、軸端部から開放する油を、可動スクロール
(12)とスイングリンク(24)との間のボス部軸受(4
2)に供給し、更に、該ボス部軸受(42)を給油した後
の油を可動スクロール(12)のスラスト軸受(43)及び
圧縮室(13)側に跳ね上げ、各部で潤滑及びシールを行
うようにしている。吐出室(15)に流出した油は油戻し
管(44)を介して底部油潤(93)に戻すようにしてい
る。尚、給油通路(4)における反圧縮要素側通路(4
0)は、図示しないが、駆動軸(2)の開放側に介装す
る主軸受やメカニカルシールに通過させている。
On the other hand, an oil supply passage (4) extending from an oil pump (3) is provided at the axis of the drive shaft (2), and oil is supplied to the main bearing (41) and oil released from the end of the shaft is supplied to the movable scroll (4). Boss bearing (4) between 12) and swing link (24)
2), and after lubricating the boss bearing (42), the oil is splashed up to the thrust bearing (43) and the compression chamber (13) side of the orbiting scroll (12), and lubrication and sealing are performed at each part. I'm trying to do it. The oil flowing into the discharge chamber (15) is returned to the bottom oil (93) via the oil return pipe (44). In addition, the anti-compression element side passage (4
0), though not shown, is passed through a main bearing and a mechanical seal interposed on the open side of the drive shaft (2).

前記油ポンプ(3)は、油室を構成する環状偏心溝
(31)をもち、キー(32)により駆動軸(2)に一体化
されるロータ(33)と、バネ(34)を介して前記偏心溝
(31)に頭部を当接させるベーン(35)とを備えた定容
積式をものであり、油溜(93)から油吸入路(36)を介
して一回転毎に定量づつ汲上げる油を油吐出路(37)か
ら環状溝(38)及び連通路(39)を経て給油通路(4)
に導くようにしている。
The oil pump (3) has an annular eccentric groove (31) forming an oil chamber, and a rotor (33) integrated with the drive shaft (2) by a key (32) and a spring (34). This is a constant displacement type provided with a vane (35) for bringing the head into contact with the eccentric groove (31), and the fixed volume is measured every rotation from an oil reservoir (93) via an oil suction path (36). Oil to be pumped from the oil discharge path (37) through the annular groove (38) and the communication path (39) to the oil supply path (4)
To lead to.

以上の構成で、第1図及び第2図に明示するように、
前記駆動軸(2)の軸端部軸心上に、前記給油通路
(4)に連続する第1凹部(45)と第2凹部(46)とを
段付き状に設けると共に、前記第1凹部(45)のネジ
(47)に螺合する小径筒部(51)と、前記第2凹部(4
6)との間に環状隙間(48)を空ける大径筒部(52)と
をもつホルダー(50)を設けて、該ホルダー(50)の端
部にキャップ体(53)を嵌合し、その中心部に、前記駆
動軸(2)の高速回転時に対応した油量を軸端部に開放
する比較的小さな口径をもつ油注入主通路(5)を開口
する。更に、前記大径筒部(52)の外周部に、複数個の
連通穴(54)を開口して、前記キャップ体(53)の内側
空間と、この連通穴(54)及び前記環状隙間(48)と
で、前記油注入主通路(5)を迂回する補助通路(6)
を形成する。尚、(49)は、スイングリンク(24)の底
面側に油を受け渡すガイド筒である。
With the above configuration, as clearly shown in FIGS. 1 and 2,
A first concave portion (45) and a second concave portion (46) continuous with the oil supply passage (4) are provided in a stepped manner on the shaft center of the drive shaft (2), and the first concave portion is provided. A small-diameter cylindrical portion (51) that is screwed into the screw (47) of the (45);
6) is provided with a holder (50) having a large-diameter cylindrical portion (52) having an annular gap (48), and a cap body (53) is fitted to an end of the holder (50). At the center thereof, an oil injection main passage (5) having a relatively small diameter is opened to release an oil amount corresponding to the high speed rotation of the drive shaft (2) to the shaft end. Further, a plurality of communication holes (54) are opened in the outer peripheral portion of the large-diameter cylindrical portion (52), and the inside space of the cap body (53), the communication holes (54) and the annular gap ( 48), an auxiliary passage (6) bypassing the oil injection main passage (5).
To form In addition, (49) is a guide cylinder for delivering oil to the bottom surface side of the swing link (24).

又、前記ホルダー(50)の内部に、前記小径筒部(5
1)内に摺動自由に挿嵌される小径部(81)と、前記大
径筒部(52)内に配設される大径部(82)及び前記キャ
ップ体(53)に臨む着座部(83)とを備え、中心に前記
給油通路(4)に連続する連続穴(84)と低速回転時に
対応した油量を設定し、前記主通路(5)よりも口径を
大きくした規制通路(85)とを開口すると共に、前記大
径部(82)に、傾斜状のガイド溝(71)とこれに納めら
れるボール(72)とを複数組放射状に配設し、各ボール
(72)に付与される遠心力の変化により各ボール(72)
を、着座部(83)側に配設する板バネから成る弾性体
(73)に抗してガイド溝(71)内に進退させる変位手段
(7)を設けた遠心式の油量調節弁(8)を介装する。
こうして、低速回転時、第1図に示すように、弾性体
(73)の付勢力が各ボール(72)に付与される遠心力に
勝り、各ボール(72)をガイド溝(71)の奥行内方に位
置させて、着座部(83)を離間させ、補助通路(6)を
給油通路(4)に対し開き、又、高速回転時、第2図に
示すように、各ボール(72)に付与される遠心力が弾性
体(73)の付勢力に勝り、各ボール(72)をガイド溝
(71)の外方に突出させて、着座部(83)を着座させ、
補助通路(6)を給油通路(4)に対し遮断し、これに
より低速回転時の油開放口を高速回転時の油開放口に対
し増大させるようにする。前記各ボール(72)が弾性体
(73)に抗して突出する回転数は約40Hz程度としてい
る。又、前記大径筒部(52)には、各ボール(72)の突
出を逃がす窓穴(55)を開口している。
The small-diameter cylindrical portion (5) is provided inside the holder (50).
1) a small-diameter portion (81) that is slidably inserted in the inside, and a large-diameter portion (82) disposed in the large-diameter cylindrical portion (52) and a seating portion facing the cap body (53). (83), a regulating hole (84) having a continuous hole (84) connected to the oil supply passage (4) at the center thereof and an oil amount corresponding to a low-speed rotation and having a larger diameter than the main passage (5). 85), and a plurality of sets of inclined guide grooves (71) and balls (72) to be accommodated in the guide grooves (71) are radially arranged in the large-diameter portion (82). Each ball (72) by the change of the applied centrifugal force
A centrifugal oil amount adjusting valve (7) provided with a displacement means (7) for moving the arm into and out of the guide groove (71) against an elastic body (73) composed of a leaf spring disposed on the seat (83) side. 8) intervene.
In this way, at the time of low-speed rotation, as shown in FIG. 1, the urging force of the elastic body (73) exceeds the centrifugal force applied to each ball (72), and each ball (72) is moved to the depth of the guide groove (71). Positioned inward, the seating part (83) is separated, the auxiliary passage (6) is opened with respect to the refueling passage (4), and at the time of high speed rotation, as shown in FIG. The centrifugal force given to the elastic member (73) exceeds the urging force of the elastic body (73), and each ball (72) is made to protrude outside the guide groove (71) to seat the seat portion (83).
The auxiliary passage (6) is shut off from the oil supply passage (4), so that the oil opening at the time of low-speed rotation is increased relative to the oil opening at the time of high-speed rotation. The rotation speed at which each of the balls (72) projects against the elastic body (73) is about 40 Hz. The large-diameter cylindrical portion (52) is provided with a window hole (55) for allowing the projection of each ball (72) to escape.

以上の構成により、20〜40Hzの範囲の低速回転時、第
1図に示すように、軸端部には、油注入主通路(5)と
補助通路(6)との2つの経路を介して油が開放され、
給油量の減少を補って必要油量を確保することができ
る。しかも、このとき開放される油量は、低速回転時に
対応した口径をもつ規制通路(85)で規制される適正な
値となるから、該低速回転時に適合した最適な給油が行
える。
With the above configuration, at the time of low-speed rotation in the range of 20 to 40 Hz, as shown in FIG. 1, the shaft end is provided with two paths of the oil injection main passage (5) and the auxiliary passage (6). Oil is released,
The required oil amount can be secured by compensating for the decrease in the oil supply amount. In addition, the amount of oil released at this time is an appropriate value regulated by the regulating passage (85) having a diameter corresponding to the low-speed rotation, so that an optimal lubrication suitable for the low-speed rotation can be performed.

一方、40〜70Hzの範囲の高速回転時、第2図に示すよ
うに、軸端部には、油注入主通路(5)のみを介して油
が開放され、開放油量を抑制して過剰給油を防止するこ
とができる。しかもこのとき開放される油量は、前記主
通路(5)を高速回転時に対応した口径にしていること
により適正な値となるから、該高速回転時に適合した最
適な給油が行える。
On the other hand, at the time of high-speed rotation in the range of 40 to 70 Hz, as shown in FIG. 2, the oil is released from the shaft end only through the main oil injection passage (5), and the amount of released oil is suppressed to suppress excess oil. Refueling can be prevented. In addition, the amount of oil released at this time becomes an appropriate value by making the main passage (5) have a diameter corresponding to the high-speed rotation, so that an optimal oil supply suitable for the high-speed rotation can be performed.

その上、一本の給油通路(4)に対して、その軸端部
の開放面積を低速回転時と高速回転時とで変更するだけ
の構成であるため、前記給油通路(4)自体を途中で分
岐させたり又は複数本構成とし、その内の一つの通路を
開閉して油量調節するものに比べ、構成を簡単にできる
のである。
In addition, since the open area of the shaft end of one oil supply passage (4) is merely changed between the low-speed rotation and the high-speed rotation, the oil supply passage (4) itself is interposed midway. The configuration can be simplified as compared with a configuration in which a branch is made or a plurality of components are used, and one of the passages is opened and closed to adjust the amount of oil.

又、前記油量調節弁(8)を駆動軸(2)の軸心上に
配置し、前記変位手段(7)を軸心に対し放射状に配置
したから、駆動軸(2)の回転バランスを狂わせること
がなく、カウンタウエイト(21)やバランスウエイト
(26)等のバランス設計をやり直す煩わしさも排除でき
るのである。
Further, since the oil amount adjusting valve (8) is arranged on the axis of the drive shaft (2) and the displacement means (7) is arranged radially with respect to the axis, the rotational balance of the drive shaft (2) can be reduced. It is possible to eliminate the trouble of re-designing the balance such as the counterweight (21) and the balance weight (26) without deviating.

(発明の効果) 本発明によれば、低速回転時、油注入主通路(5)と
補助通路(6)との2つの経路を介して駆動軸(2)の
軸端部に規制通路(85)の開口面積で決まる量の油を開
放でき、給油量の減少を補って必要油量を確保でき、給
油部の潤滑やシールを良好に行うことができると共に、
高速回転時、補助通路(6)を遮断して油注入主通路
(5)のみを介して該主通路(5)の開口面積で決まる
量の油を開放でき、開放油量を抑制して過剰給油を防止
でき、油上がりの問題を回避することができ、しかも、
これら低油圧時と高油圧時との通路の切換に際し、遠心
力により油量調節弁(8)を変位させているが、駆動軸
(2)の回転バランスを狂わせることもなく、低速回転
時及び高速回転時双方について適正な給油が行えるので
ある。
(Effects of the Invention) According to the present invention, at the time of low-speed rotation, the restriction passage (85) is formed at the shaft end of the drive shaft (2) through the two passages of the oil injection main passage (5) and the auxiliary passage (6). ) The amount of oil determined by the opening area can be released, the required amount of oil can be secured by compensating for the decrease in the amount of lubrication, and the lubrication and sealing of the lubrication section can be performed well.
At the time of high-speed rotation, the auxiliary passage (6) is shut off and the amount of oil determined by the opening area of the main passage (5) can be released only through the oil injection main passage (5). It can prevent refueling, avoid the problem of oil rising, and
In switching the passage between the low hydraulic pressure and the high hydraulic pressure, the oil amount control valve (8) is displaced by centrifugal force. However, the rotational balance of the drive shaft (2) is not disturbed, Appropriate refueling can be performed at both high-speed rotations.

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

第1図は本発明に係る給油機構の低速回転時における要
部断面図、第2図は同高速回転時における要部断面図、
第3図は同全体構成を示す断面図、第4図は従来例の断
面図である。 (1)……圧縮要素 (2)……駆動軸 (3)……油ポンプ (4)……給油通路 (5)……油注入主通路 (6)……補助通路 (7)……変位手段 (8)……油量調節弁
FIG. 1 is a cross-sectional view of a main part of the oil supply mechanism according to the present invention at the time of low-speed rotation, FIG.
FIG. 3 is a cross-sectional view showing the overall configuration, and FIG. 4 is a cross-sectional view of a conventional example. (1) Compression element (2) Drive shaft (3) Oil pump (4) Oil supply passage (5) Oil injection main passage (6) Auxiliary passage (7) Displacement Means (8) Oil control valve

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平2−5787(JP,A) 特開 平1−219383(JP,A) 特開 昭62−10487(JP,A) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-5787 (JP, A) JP-A-1-219383 (JP, A) JP-A-62-10487 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】圧縮要素(1)を駆動する駆動軸(2)の
内部に、一回転毎の汲上げ油量が定量となる定容量式の
油ポンプ(3)から延びる給油通路(4)を備え、前記
駆動軸(2)の軸端部から開放する油を給油部に供給す
るようにした圧縮機の給油機構において、前記駆動軸
(2)の軸端部に、前記給油通路(4)に連通する油注
入主通路(5)と該主通路(5)を迂回する補助通路
(6)とを設けると共に、前記駆動軸(2)の軸端部軸
心上に、前記主通路(5)および補助通路(6)に連通
する規制通路(85)が内部に設けられ前記駆動軸(2)
の軸方向に移動可能な油量調節弁(8)ならびに前記駆
動軸(2)の回転数の増加に基づく遠心力の増大により
該駆動軸(2)の軸心に対し放射状に変位することによ
り前記油量調節弁(8)を前記軸方向に移動させる複数
の変位手段(7)を備え、低速回転時には、規制通路
(85)から前記主通路(5)および補助通路(6)を介
して給油部に油を開放し、高速回転時には、前記変位手
段(7)の変位により前記油量調節弁(8)を前記軸方
向に移動させて前記規制通路(85)と前記補助通路
(6)との連通を遮断して、規制通路(85)から前記主
通路(5)を介して給油部に油を開放し、前記規制通路
(85)の開口面積は、低速回転時の油量を決める大きさ
に、前記主通路(5)の開口面積は、前記規制通路(8
5)よりも小さく、高速回転時の油量を決める大きさに
それぞれ設定していることを特徴とする圧縮機の給油機
構。
An oil supply passage (4) extending from a constant-capacity oil pump (3) in a drive shaft (2) for driving a compression element (1), wherein a pumping oil amount per rotation is determined. And an oil supply mechanism for supplying oil released from the shaft end of the drive shaft (2) to an oil supply unit, wherein the oil supply passage (4) is provided at the shaft end of the drive shaft (2). ) And an auxiliary passage (6) bypassing the main passage (5), and the main passage (5) is provided on the shaft center of the drive shaft (2). 5) and a regulating passage (85) communicating with the auxiliary passage (6) is provided inside the driving shaft (2).
The oil amount adjusting valve (8) movable in the axial direction of the drive shaft (2) and the radial displacement with respect to the axis of the drive shaft (2) due to the increase in the centrifugal force based on the increase in the rotation speed of the drive shaft (2). A plurality of displacement means (7) for moving the oil amount adjusting valve (8) in the axial direction is provided, and at the time of low-speed rotation, from the restriction passage (85) via the main passage (5) and the auxiliary passage (6). At the time of high-speed rotation, the oil amount adjusting valve (8) is moved in the axial direction by the displacement of the displacement means (7) to release the oil to the oil supply section, and the regulating passage (85) and the auxiliary passage (6) are moved. The oil is released from the restriction passage (85) to the oil supply section via the main passage (5), and the opening area of the restriction passage (85) determines the amount of oil during low-speed rotation. The size of the opening of the main passage (5) depends on the size of the regulating passage (8).
5) An oil supply mechanism for a compressor, which is smaller than 5) and is set to a size that determines the amount of oil during high-speed rotation.
JP2249735A 1990-09-18 1990-09-18 Oil supply mechanism for compressor Expired - Fee Related JP2712797B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2249735A JP2712797B2 (en) 1990-09-18 1990-09-18 Oil supply mechanism for compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2249735A JP2712797B2 (en) 1990-09-18 1990-09-18 Oil supply mechanism for compressor

Publications (2)

Publication Number Publication Date
JPH04128586A JPH04128586A (en) 1992-04-30
JP2712797B2 true JP2712797B2 (en) 1998-02-16

Family

ID=17197428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2249735A Expired - Fee Related JP2712797B2 (en) 1990-09-18 1990-09-18 Oil supply mechanism for compressor

Country Status (1)

Country Link
JP (1) JP2712797B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100315791B1 (en) * 1999-01-19 2001-12-12 구자홍 Scroll Compressor
FR2919688B1 (en) * 2007-08-02 2013-07-26 Danfoss Commercial Compressors SPIRAL REFRIGERATOR COMPRESSOR WITH VARIABLE SPEED

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0778391B2 (en) * 1985-07-05 1995-08-23 松下電器産業株式会社 Scroll gas compressor
JP2583944B2 (en) * 1988-02-26 1997-02-19 松下冷機株式会社 Compressor
JPH0799151B2 (en) * 1988-06-22 1995-10-25 三菱電機株式会社 Scroll compressor
JPH0245686A (en) * 1988-08-03 1990-02-15 Daikin Ind Ltd Horizontal open compressor

Also Published As

Publication number Publication date
JPH04128586A (en) 1992-04-30

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