JPS585109Y2 - Rotary compressor lubrication system - Google Patents

Description

【考案の詳細な説明】 本考案は車両用空調機に使用される回転圧縮機の潤滑装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating device for a rotary compressor used in a vehicle air conditioner.

一般に車両用空調機に供される冷媒Ｒ−１２は冷凍機器
との親和性が強く、油との完全な分離はできない。Generally, the refrigerant R-12 used in vehicle air conditioners has a strong affinity with refrigeration equipment, and cannot be completely separated from oil.

しかし、ガス流速を落としたり、方向を急変させたり、
繊維状媒体を通過させると相当効果的に分離できること
が知られている。However, if you reduce the gas flow velocity or suddenly change the direction,
It is known that separation can be achieved quite effectively by passing through a fibrous medium.

そして、この分離油を圧縮機の潤滑、可動翼の押し出し
に強制力を以て利用する種々の方策が考案されている。Various measures have been devised to utilize this separated oil for lubricating the compressor and pushing out the movable blades by force.

しかるに油分離位置は高圧側か低圧側のどちらか一方で
遂行させており以下の問題があった。However, the oil separation position is performed on either the high pressure side or the low pressure side, which poses the following problems.

すなわら、高圧側の分離では、（１）分離油温か高くな
り、その冷却作用が望めないため高速域で冷媒の吐出温
度が異常に上昇する。Specifically, in the separation on the high pressure side, (1) the temperature of the separated oil becomes high and its cooling effect cannot be expected, so the discharge temperature of the refrigerant increases abnormally in the high speed range.

（２）用途（車両用）の特殊性から大型にできず低圧域
が制限され吸入冷媒が、すぐにシリンダ内で圧縮される
ため、液圧縮の危険がある。(2) Due to the special nature of the application (vehicle use), it cannot be made large, the low pressure region is restricted, and the suction refrigerant is immediately compressed within the cylinder, so there is a risk of liquid compression.

また低圧側の分離では、（１）起動時の急速な圧力低下
で分離油中の冷媒による泡立ちが発生する。Furthermore, in the separation on the low pressure side, (1) bubbling occurs due to the refrigerant in the separated oil due to the rapid pressure drop at startup.

などの欠点があった。There were drawbacks such as.

本考案は上記従来の欠点を解消するもので、可動翼の押
出しに使用する分離油を、起動時と運転時に異ならせる
ことにより、可動翼の押出しを確実にすることを目的と
するものである。The present invention solves the above-mentioned conventional drawbacks, and aims to ensure the extrusion of the movable blades by using different separated oils at startup and during operation. .

この目的を達成するために本考案は、冷媒圧縮機の殻体
内を低圧室と高圧室に分割し、この各室のガス入口孔近
くに油分“離器を配し、各室下部に油槽を付設するとと
もに油ポンプの吸入側とこの油槽を連絡する油路を設け
、この油路め途中に切替弁装置番設けて圧縮娠の起動時
は高圧側油槽より給油し、運転時は低圧側油槽より給油
するようにしたものである。To achieve this objective, the present invention divides the refrigerant compressor shell into a low-pressure chamber and a high-pressure chamber, places an oil separator near the gas inlet of each chamber, and installs an oil tank at the bottom of each chamber. At the same time, an oil passage connecting the suction side of the oil pump and this oil tank is installed, and a switching valve device is installed in the middle of this oil passage, so that oil is supplied from the high pressure side oil tank at the start of compression, and from the low pressure side oil tank during operation. It is designed to provide more fuel.

この構成によって、可動翼の押出しに稗用する分離油を
、起動時は高圧側の分離油を使用し、定常した運転時は
低圧側の分離油を信用することにより、可動翼の押出し
を確実にして、圧縮作用を確実にし、さらに低圧側の低
温油による各摺動部の冷却を行い、異常温度の上昇を阻
止するものである。With this configuration, the separation oil used for extruding the movable blades is the high-pressure side separation oil at startup, and the low-pressure side separation oil is relied on during steady operation, ensuring extrusion of the movable blades. This ensures the compression action, and also cools each sliding part using low-temperature oil on the low-pressure side to prevent an abnormal temperature rise.

以下本考案の一実施例を添付図面にもとづいて説明する
。An embodiment of the present invention will be described below based on the accompanying drawings.

第１図において、１はシリンダ、２はロータ、３は駆動
軸で、キー４によって回転力をロータ２に伝達している
。In FIG. 1, 1 is a cylinder, 2 is a rotor, and 3 is a drive shaft, which transmits rotational force to the rotor 2 by a key 4.

この駆動軸３は前軸受部５、後軸受部６の軸受７で回転
自在に支承されている。This drive shaft 3 is rotatably supported by bearings 7 of a front bearing part 5 and a rear bearing part 6.

そして、後軸受部６は第２図のように低圧室８と高圧室
９に分割され、高圧室９への吐出ガス入口孔１０近くに
油付着性媒体などの油分離器１１が設けられている。The rear bearing part 6 is divided into a low pressure chamber 8 and a high pressure chamber 9 as shown in FIG. There is.

１２は駆動軸３の軸端に設けたトロコイド形のポンプで
、吸入ポート１３と吐出ポート１４が穿設され、切替弁
装置１５を内蔵したポンプケース１６とその側板１７に
よって密閉されている。Reference numeral 12 denotes a trochoidal pump provided at the shaft end of the drive shaft 3, which has a suction port 13 and a discharge port 14, and is sealed by a pump case 16 containing a switching valve device 15 and its side plate 17.

１８はポンプケース１６を覆ったケースで、後軸受部６
の高圧室９、低圧室８と対応して開口するように高圧室
（図示せず）、低圧室８′に分割されており、吸入ガス
入口孔１９近くに油付着性媒体などの油分離器２０を持
つ。18 is a case that covers the pump case 16, and the rear bearing part 6
It is divided into a high pressure chamber (not shown) and a low pressure chamber 8' with openings corresponding to the high pressure chamber 9 and low pressure chamber 8, and an oil separator such as an oil-adhesive medium is installed near the intake gas inlet hole 19. Have 20.

次に切替弁装置１５の構成と、作動順序および油の流れ
について説明する。Next, the configuration, operating order, and oil flow of the switching valve device 15 will be explained.

第３図、第４図に示す如く切替弁装置１５は移動可能で
中央付近に切欠き２１を有するピストン２２と、ピスト
ン２２を第３図中右方へ押圧するバネ２３と、ケース１
８の低圧室８′とバネ室２４を連通する通孔２５を有す
るバネ受け２６によって構成されている。As shown in FIGS. 3 and 4, the switching valve device 15 includes a movable piston 22 having a notch 21 near the center, a spring 23 that presses the piston 22 to the right in FIG. 3, and a case 1.
The spring receiver 26 has a through hole 25 that communicates the low pressure chamber 8' of 8 and the spring chamber 24.

そして、圧部機の停止時、圧力がバランスしている時は
バネ２３によってピストン２２は一端（図において右側
）へ押されている。When the pressure section machine is stopped and the pressure is balanced, the piston 22 is pushed toward one end (to the right in the figure) by the spring 23.

そしてエンジンなどの外部駆動源（図示せず）によって
、圧縮機の回転が始まると高圧室９の下部の油槽９ａに
溜った油がポンプ１２の吸引力によって後部軸受部６に
穿設された油路２７から後部軸受部６、側板１７、ポン
プケース１６に一致させて設けられた２本の油路２８，
２９を通る。When the compressor starts to rotate by an external drive source (not shown) such as an engine, the oil accumulated in the oil tank 9a at the bottom of the high pressure chamber 9 is pumped into the rear bearing part 6 by the suction force of the pump 12. Two oil passages 28 are provided from the passage 27 to the rear bearing part 6, the side plate 17, and the pump case 16.
Pass through 29.

油路２８を出た油はピストレ２２．の切欠き２１を通り
吸入ポート１３に連通ずる通孔３０を通りポンプ１２に
収入される。The oil coming out of the oil passage 28 is transferred to the piston 22. The water is supplied to the pump 12 through a through hole 30 which passes through the cutout 21 and communicates with the suction port 13.

油路２９を出た油はピストン２２の端面にかかり、圧縮
機の回転につれて高圧室９と低圧室８′の差圧が１＜ネ
２３の取付強さを超えた時からピストン２２をグネ２３
の方向へ移動させ第４図のようにバネ７ｉ２６の一端に
当たって止まる。The oil coming out of the oil passage 29 is applied to the end face of the piston 22, and as the compressor rotates, the pressure difference between the high pressure chamber 9 and the low pressure chamber 8' exceeds the mounting strength of 1<N 23.
It is moved in the direction shown in FIG. 4 and stops when it hits one end of the spring 7i26.

この時高圧側からの油路２８は第４図に示す如くピスト
ン２２で遮断され、新たに低圧室８′の下部の油槽８ａ
からの油路３１が開口し、低圧室８′で分離された油が
通孔３０を通って吸入、ｆｉ−Ｎ３に送り込まれる。At this time, the oil passage 28 from the high pressure side is blocked by the piston 22 as shown in FIG.
The oil passage 31 from the low pressure chamber 8' is opened, and the oil separated in the low pressure chamber 8' is sucked through the through hole 30 and sent to fi-N3.

したがって、起動直後に泡立っている低圧側の分離油を
吸い上げることなく、高圧側の分離油を吸い込み、高低
圧に一定の圧力差が生じ安定した頃、すなわち泡立ちが
解消した頃に低圧側の分離油を供給することが可能とな
る。Therefore, instead of sucking up the separated oil on the low pressure side that bubbles immediately after startup, the separated oil on the high pressure side is sucked in, and the separation on the low pressure side occurs when a certain pressure difference between high and low pressures is created and stabilized, that is, when the bubbling has disappeared. It becomes possible to supply oil.

その結果、起動時泡立っている低圧側の分離油を吸込ま
ないのでポンプ１２の異音が無く、可動翼の押し出しに
分離油を利用する時、液状油を用いるので翼基端空間で
のガス圧縮による翼のバタつきが無く、確実に翼を押し
出し急速に圧縮作用が行なえる。As a result, since the separated oil on the low-pressure side that bubbles during startup is not sucked in, there is no abnormal noise from the pump 12, and when the separated oil is used to push out the movable blades, since liquid oil is used, the gas in the blade base space is reduced. There is no flapping of the blades due to compression, and the blades can be pushed out reliably and compressed quickly.

さらに定常状態になった際、低圧側の低温油を利用する
ので圧縮機各摺動部の冷却によって異常温度上昇を阻止
し、吸入冷媒ガスが直接シリンダに入らないため、液圧
縮の危険も解消できる。Furthermore, when the steady state is reached, the low-temperature oil on the low-pressure side is used to cool each sliding part of the compressor, preventing an abnormal temperature rise, and since the suction refrigerant gas does not directly enter the cylinder, the risk of liquid compression is eliminated. can.

以上のように本考案の回転圧縮機の潤滑装置は、可動翼
を押出す分離油を、起動時は高圧側のものを使用し、定
常運転時は低圧側のものを使用するため、起動時に気泡
を自む油を可動翼側へ送り込むことがないｔこめ、可動
翼の押出しが確実となり、圧縮効率の低下が防止でき１
．またポンプには気泡を自む油の吸込みがないため、ポ
ンプの異音がなく、さらに、定常運転時は、低圧側の低
温油を各摺動部へ送り込むた吟、圧縮機の冷却効果が得
られ、しかも吸入冷媒ガスが直接シリンダへ流入しない
ため、液圧縮のおそれもないなど、種々の利点を有する
ものである。As described above, the rotary compressor lubrication system of the present invention uses the high-pressure side of the separated oil that pushes out the movable blades at startup, and uses the low-pressure side during steady operation. Since the oil containing bubbles is not sent to the movable blade side, the extrusion of the movable blade is ensured, and a decrease in compression efficiency can be prevented.
．． In addition, the pump does not suck in oil that creates air bubbles, so there is no abnormal pump noise.Furthermore, during steady operation, low-temperature oil on the low-pressure side is sent to each sliding part, which has a cooling effect on the compressor. Furthermore, since the suction refrigerant gas does not directly flow into the cylinder, there is no risk of liquid compression, and it has various advantages.

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

第１図は本考案の一宋症例におけや回転圧縮機の潤滑装
置の部分的横断向学、第２図は第１図のＸ−Ｘ線断面矢
視図、第３図、第４図は第１図のＹ−Ｙ線断面矢視図で
、第３図は停止時および起動時の切替弁装置の位置、第
４図は通常運転状態時の切替弁装置の位置を示している
。 ３・・・・・・、駆動軸、６，１８・・・・・・後軸受
部、ケース（殻体）、８，８′・・・・・・低串室、８
ａ・・・・・・油槽、９・・・・・・高圧室、９ａ・・
・・＝・油槽、１０．１９・・・・・・ガス入口孔、１
１，２０・・・・・・油分離器、１２・・・・・・ポン
プ、１５・・・・・・切替弁装置、２７．２Ｂ、２９．
３１・・・・・・油路、３０・・・・・・通孔（油路）
。Figure 1 is a partial cross-sectional view of the lubricating device for a rotary compressor in a Song Dynasty case of the present invention, Figure 2 is a cross-sectional view taken along the line X--X of Figure 1, Figures 3 and 4. 1 is a sectional view taken along the line Y--Y in FIG. 1, FIG. 3 shows the position of the switching valve device at the time of stop and startup, and FIG. 4 shows the position of the switching valve device during normal operation. 3... Drive shaft, 6, 18... Rear bearing, case (shell), 8, 8'... Low skewer chamber, 8
a...Oil tank, 9...High pressure chamber, 9a...
... = Oil tank, 10.19 ... Gas inlet hole, 1
1, 20...Oil separator, 12...Pump, 15...Switching valve device, 27.2B, 29.
31...Oil passage, 30...Through hole (oil passage)
.

Claims (1)

【実用新案登録請求の範囲】 油分離器を有する殻体と、駆動軸の軸端に装備された油
ポンプを有する冷媒圧縮機を構威し、この殻体を低圧室
と高圧室に分割し１この各室のガス入口孔近くに油分離
器を配し、各室下部に油槽を付設するとともにこの油ポ
ンプの吸入側と前記油槽を連絡する油路を設け、どの“
油路の途中に圧縮機め起動時は高圧側油槽より、パ運転
時は低圧側油槽より給油する切替弁装置を設けた回転圧
縮機の潤滑装置。 ・[Claims for Utility Model Registration] A shell body with an oil separator and a refrigerant compressor with an oil pump installed at the end of the drive shaft, and this shell body is divided into a low pressure chamber and a high pressure chamber. 1. An oil separator is placed near the gas inlet hole of each chamber, an oil tank is attached to the bottom of each chamber, and an oil passage is provided to connect the suction side of the oil pump with the oil tank.
A rotary compressor lubrication system that is equipped with a switching valve device in the oil path that supplies oil from the high-pressure side oil tank when the compressor is started up and from the low-pressure side oil tank when it is in full operation.・