JP2005002823A - Compressor - Google Patents

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Publication number
JP2005002823A
JP2005002823A JP2003164979A JP2003164979A JP2005002823A JP 2005002823 A JP2005002823 A JP 2005002823A JP 2003164979 A JP2003164979 A JP 2003164979A JP 2003164979 A JP2003164979 A JP 2003164979A JP 2005002823 A JP2005002823 A JP 2005002823A
Authority
JP
Japan
Prior art keywords
packing
compression mechanism
pressure chamber
fluid
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.)
Pending
Application number
JP2003164979A
Other languages
Japanese (ja)
Inventor
Yoshihiro Isono
芳博 磯野
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2003164979A priority Critical patent/JP2005002823A/en
Publication of JP2005002823A publication Critical patent/JP2005002823A/en
Pending legal-status Critical Current

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  • Compressor (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor having such structure that utilizes lubricating oil effectively to improve durability and reduce noise. <P>SOLUTION: This compressor is provided with a compression mechanism for compressing fluid containing lubricating oil and a high pressure chamber having an oil storage part in which the fluid compressed by the compression mechanism is led and at least a part of the lubricating oil contained in the fluid is separated and stored. A communicating hole is provided in packing between a vertical and lower space of a rear part side plate forming an operation chamber of the compression mechanism and the oil storage part. Furthermore, an introduction hole for leading the fluid from the compression mechanism into the high pressure chamber is provided above the packing so that a part of the fluid from the compression mechanism flows into the high pressure chamber through the introduction hole to prevent breakage of the packing by pressure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、流体の圧縮を行う圧縮機に関するもので、特に自動車用空調装置などに用いられる圧縮機に関するものである。
【0002】
【従来の技術】
従来のベーン型圧縮機においては、特許文献1に示されるように高圧室内に貯油部が設けられており、起動直後を除く通常運転時にはベーン背圧付与装置もしくはそれに準じる機構を使用して、高圧室貯油部に貯まった潤滑油をベーン背圧部に供給することによってベーンをロータから押し出す働きと、シリンダ・ベーン・ロータ等の潤滑を行っている。このような圧縮機においては、圧縮された流体と共に圧縮機潤滑油の一部を常に空調装置のシステムサイクル中へ排出している。
【0003】
【特許文献1】
特開昭62−58082号公報
【0004】
【発明が解決しようとする課題】
上記従来の圧縮機は、高圧室貯油部に貯えられる潤滑油は最低でも油面がベーン背圧付与装置下部の潤滑油供給口より高くなる量が必要である。
【0005】
しかし、図3に示すように高圧室と圧縮機後部の間に介在されたパッキン30は、主導通穴32を具備するものの潤滑油の貯油部に対抗する部位31が閉塞状態にあった。そのため、後部側板の鉛直下方に例えば軽量化の関係から肉ヌスミを設け、空間が存在する場合には、潤滑油がパッキン30との間で閉じ込められる構造となり、そこに溜まった潤滑油は再びシステムサイクル中で使用されることはないために、高圧室貯油部の潤滑油量の減少による潤滑不良で圧縮機の焼き付きが起こり易くなるという課題があった。
【0006】
これを解消するために、前記部位31に連通穴19を設け、この部位31に潤滑油が貯まらないように構成されたが、パッキン30の上方は、閉塞状態にあって圧縮機構からの圧力を受けるため、パッキン30が圧力によって破損する問題があった。
【0007】
本発明は、上記従来の課題を解決するもので、簡単な構成によって潤滑油を確実に高圧室貯油部に戻し、かつパッキンの破損を防止するものである。
【0008】
【課題を解決するための手段】
前記従来の課題を解決するために、本発明による圧縮機においては、高圧通路を構成している後部側板の鉛直下方と高圧室貯油部との間のパッキンに連通穴を形成し、さらに前記パッキンの上方に、前記圧縮機構からの流体を前記高圧室に導く導通穴を設けたものである
かかる構成とすることにより、前記連通穴を利用することで、従来後部側板とパッキンの間の空間に溜まっていた潤滑油を確実に高圧室貯油部に戻すことができ、また、上方に設けた導通穴により、圧縮機構からの高圧を逃がすことができ、結果としてパッキンの破損が防止できる。
【0009】
【発明の実施の形態】
以下、本発明の実施形態について図面を参照しながら説明する。
【0010】
図1、図2において、1は円筒内壁を有するシリンダ、2はその外周の一部がシリンダ1内壁と微少隙間を形成するロータ、3はロータ2に設けられた複数のべ一ンスロット内に摺動自在に挿入された複数のベーン、4はロータ2と一体的に形成され回転自在に軸支される駆動軸、5及び6はそれぞれシリンダ1の両端を閉塞して内部に作動室を形成する前部側板及び後部側板、7は高圧側の作動室から圧縮した流体を吐出する吐出孔、8は吐出孔に配設された吐出弁、9は圧縮された流体を高圧室10へ導く高圧通路、11は高圧室10を形成する高圧ケース、パッキン18は、高圧室10と大気とを区画密封している。12は圧縮された流体を高圧室10から空調装置のシステムサイクルに排出するガス排出口、13はベーン背圧付与装置、14はベーン背圧付与装置13の下部に設けられた潤滑油供給口、15はゴミ・細かい金属の破片等の流入を防止するストレーナ、16は給油路、17はベーン背圧部で、ベーン背圧付与装置13によって、高圧室10下部の貯油部10aに貯まった潤滑油10bを潤滑油供給口14から給油路16を通じてベーン背圧部17に供給している。18は前記後部側板6と高圧ケース11の間に設けられたパッキンで、その上部には、前記高圧通路9と高圧室10を導通する導通穴20が設けられ、また側部には、前記導通穴20よりも大きな面積からなる主導通穴21が設けられている。
【0011】
上記構成において、エンジンなどの駆動源より動力伝達を受けて駆動軸4及びロータ2が回転すると、圧縮された高圧流体は吐出孔7より吐出弁8を押し上げて高圧通路9より一部は導通穴20を通り、残る大半はパッキン18の面に沿って主導通穴21へ導かれ、ここから高圧室10内に流入し、高圧ケース11に設けられたガス排出口12より圧縮機外部へ排出される。この時、高圧室10上部で分離された潤滑油は、高圧室貯油部10aに滴下し貯えられる。
【0012】
後部側板6は、通常軽量化や強度の関係から肉ヌスミやリブを設けて凹凸を具備した面となっている。そのために、後部側板6とパッキン18の間には閉じられた空間6aが形成される。また、潤滑油を含んだ冷媒が高圧通路9から高圧室11へ流れる際にパッキン18を伝わって前述の閉じられた空間6aに貯えられる。
【0013】
後部側板の空間6aとパッキン18の間に連通穴19を設けることにより、貯えられた潤滑油を確実に高圧室貯油部10aに戻すことができ、潤滑油を有効に利用することができる。これにより、ベーン背圧付与装置13の潤滑油供給口14から圧縮機構に安定して潤滑油を供給することができる。また、パッキン18の上部には、導通穴20を設けているため、高圧通路9からの圧力を受けてパッキン18が破損することもない。
【0014】
【発明の効果】
以上説明したように、本発明の圧縮機は、後部側板の鉛直下方と高圧室貯油部との間のパッキンに連通穴を形成することにより、圧縮機構に安定して潤滑油を供給することができるようになるため、圧縮機構の潤滑不良による焼き付き等、圧縮機の耐久性の低下を防止し、信頼性を向上させることができ、また前記パッキンの上方に、前記圧縮機構からの流体を前記高圧室に導く導通穴を設けたことにより、パッキンの破損が防止できるものである。
【図面の簡単な説明】
【図1】本発明の実施の形態における圧縮機の横断面図
【図2】同実施の形態におけるパッキンの正面図
【図3】従来例を示すパッキンの正面図
【符号の説明】
1 シリンダ
2 ロータ
3 ベーン
4 駆動軸
5 前部側板
6 後部側板
7 吐出孔
8 吐出弁
9 高圧通路
10 高圧室
10a 高圧室貯油部
11 高圧ケース
12 ガス排出口
13 ベーン背圧付与装置
14 潤滑油供給口
15 ストレーナ
16 給油路
17 ベーン背圧部
18 パッキン
19 連通穴
20 導通穴
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compressor that compresses a fluid, and particularly to a compressor that is used in an air conditioner for automobiles.
[0002]
[Prior art]
In a conventional vane type compressor, as shown in Patent Document 1, an oil storage section is provided in a high-pressure chamber, and during normal operation except immediately after startup, a vane back pressure applying device or a mechanism equivalent thereto is used. By supplying lubricating oil stored in the chamber oil storage part to the vane back pressure part, the vane is pushed out from the rotor, and the cylinder, vane, rotor and the like are lubricated. In such a compressor, a part of the compressor lubricating oil is always discharged into the system cycle of the air conditioner together with the compressed fluid.
[0003]
[Patent Document 1]
JP-A-62-58082 [0004]
[Problems to be solved by the invention]
In the above conventional compressor, the amount of the lubricating oil stored in the high pressure chamber oil storage unit needs to be at least an amount such that the oil level is higher than the lubricating oil supply port below the vane back pressure applying device.
[0005]
However, as shown in FIG. 3, the packing 30 interposed between the high pressure chamber and the rear portion of the compressor has a main conduction hole 32, but the portion 31 that opposes the oil storage portion of the lubricating oil is in a closed state. For this reason, for example, when a space is present in the vertical lower portion of the rear side plate, the lubricating oil is confined between the packing 30 when there is a space. Since it is not used in the cycle, there has been a problem that the seizure of the compressor is likely to occur due to poor lubrication due to a decrease in the amount of lubricating oil in the high-pressure chamber oil storage section.
[0006]
In order to solve this problem, the communication hole 19 is provided in the part 31 so that the lubricating oil does not accumulate in the part 31. However, the upper side of the packing 30 is in a closed state and the pressure from the compression mechanism is applied. Therefore, there is a problem that the packing 30 is damaged by pressure.
[0007]
The present invention solves the above-described conventional problems, and reliably returns the lubricating oil to the high-pressure chamber oil storage portion with a simple configuration and prevents damage to the packing.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned conventional problems, in the compressor according to the present invention, a communication hole is formed in the packing between the vertical lower side of the rear side plate constituting the high-pressure passage and the high-pressure chamber oil storage part, and the packing In the space between the rear side plate and the packing in the prior art, the communication hole is used to provide a conduction hole for guiding the fluid from the compression mechanism to the high pressure chamber. The accumulated lubricating oil can be reliably returned to the high-pressure chamber oil storage section, and the high pressure from the compression mechanism can be released by the conduction hole provided above, and as a result, damage to the packing can be prevented.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
1 and 2, 1 is a cylinder having a cylindrical inner wall, 2 is a rotor in which a part of its outer periphery forms a minute gap with the inner wall of the cylinder 1, and 3 is in a plurality of vane slots provided in the rotor 2. A plurality of vanes 4 slidably inserted, 4 is a drive shaft that is integrally formed with the rotor 2 and is rotatably supported, and 5 and 6 are respectively closed at both ends of the cylinder 1 to form working chambers therein. The front side plate and the rear side plate, 7 is a discharge hole for discharging the compressed fluid from the working chamber on the high pressure side, 8 is a discharge valve disposed in the discharge hole, and 9 is a high pressure for guiding the compressed fluid to the high pressure chamber 10. A passage 11 is a high-pressure case forming the high-pressure chamber 10, and a packing 18 partitions and seals the high-pressure chamber 10 and the atmosphere. 12 is a gas discharge port for discharging the compressed fluid from the high pressure chamber 10 to the system cycle of the air conditioner, 13 is a vane back pressure applying device, 14 is a lubricating oil supply port provided at the lower part of the vane back pressure applying device 13, 15 is a strainer that prevents inflow of dust, fine metal fragments, etc. 16 is an oil supply passage, 17 is a vane back pressure part, and the lubricant stored in the oil storage part 10a at the lower part of the high pressure chamber 10 by the vane back pressure applying device 13 is provided. 10 b is supplied from the lubricating oil supply port 14 to the vane back pressure portion 17 through the oil supply passage 16. 18 is a packing provided between the rear side plate 6 and the high-pressure case 11, and a conduction hole 20 is provided in the upper portion thereof for conducting the high-pressure passage 9 and the high-pressure chamber 10. A main conduction hole 21 having a larger area than the hole 20 is provided.
[0011]
In the above configuration, when the drive shaft 4 and the rotor 2 are rotated by receiving power transmission from a drive source such as an engine, the compressed high-pressure fluid pushes up the discharge valve 8 from the discharge hole 7 and a part of the high-pressure passage 9 is a conduction hole. 20, most of the remainder is led to the main conduction hole 21 along the surface of the packing 18, flows into the high pressure chamber 10 from here, and is discharged from the gas discharge port 12 provided in the high pressure case 11 to the outside of the compressor. The At this time, the lubricating oil separated in the upper part of the high pressure chamber 10 is dropped and stored in the high pressure chamber oil storage part 10a.
[0012]
The rear side plate 6 is a surface provided with unevenness by providing meat burrs and ribs for light weight and strength. Therefore, a closed space 6 a is formed between the rear side plate 6 and the packing 18. Further, when the refrigerant containing the lubricating oil flows from the high-pressure passage 9 to the high-pressure chamber 11, it is transmitted through the packing 18 and stored in the closed space 6 a.
[0013]
By providing the communication hole 19 between the space 6a of the rear side plate and the packing 18, the stored lubricating oil can be reliably returned to the high-pressure chamber oil storage section 10a, and the lubricating oil can be used effectively. Thereby, it is possible to stably supply the lubricating oil from the lubricating oil supply port 14 of the vane back pressure applying device 13 to the compression mechanism. Further, since the conduction hole 20 is provided in the upper part of the packing 18, the packing 18 is not damaged by receiving pressure from the high-pressure passage 9.
[0014]
【The invention's effect】
As described above, the compressor of the present invention can stably supply the lubricating oil to the compression mechanism by forming a communication hole in the packing between the vertical lower side of the rear side plate and the high pressure chamber oil storage part. Therefore, it is possible to prevent the deterioration of the durability of the compressor, such as seizure due to poor lubrication of the compression mechanism, and to improve the reliability. Further, the fluid from the compression mechanism is placed above the packing. By providing a conduction hole leading to the high-pressure chamber, damage to the packing can be prevented.
[Brief description of the drawings]
1 is a cross-sectional view of a compressor according to an embodiment of the present invention. FIG. 2 is a front view of a packing according to the embodiment. FIG. 3 is a front view of a packing according to a conventional example.
DESCRIPTION OF SYMBOLS 1 Cylinder 2 Rotor 3 Vane 4 Drive shaft 5 Front side plate 6 Rear side plate 7 Discharge hole 8 Discharge valve 9 High pressure passage 10 High pressure chamber 10a High pressure chamber oil storage portion 11 High pressure case 12 Gas discharge port 13 Vane back pressure applying device 14 Lubricant supply Port 15 Strainer 16 Oil supply path 17 Vane back pressure part 18 Packing 19 Communication hole 20 Conduction hole

Claims (1)

潤滑油を含む流体を圧縮する圧縮機構と、前記圧縮機構により圧縮された前記流体が導かれ、前記流体に含まれる潤滑油の少なくとも一部が分離され貯えられる貯油部を持つ高圧室を備えている圧縮機において、前記圧縮機構の作動室を形成する後部側板の鉛直下方の空間と前記貯油部との間のパッキンに連通穴を設け、さらに前記パッキンの上方に、前記圧縮機構からの流体を前記高圧室に導く導通穴を設けたことを特徴とする圧縮機。A compression mechanism that compresses a fluid containing lubricating oil; and a high-pressure chamber that has an oil storage section through which the fluid compressed by the compression mechanism is guided and at least a part of the lubricating oil contained in the fluid is separated and stored. In the compressor, a communication hole is provided in the packing between the space vertically below the rear side plate forming the working chamber of the compression mechanism and the oil storage part, and further, the fluid from the compression mechanism is passed above the packing. A compressor provided with a conduction hole leading to the high-pressure chamber.
JP2003164979A 2003-06-10 2003-06-10 Compressor Pending JP2005002823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003164979A JP2005002823A (en) 2003-06-10 2003-06-10 Compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003164979A JP2005002823A (en) 2003-06-10 2003-06-10 Compressor

Publications (1)

Publication Number Publication Date
JP2005002823A true JP2005002823A (en) 2005-01-06

Family

ID=34091605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003164979A Pending JP2005002823A (en) 2003-06-10 2003-06-10 Compressor

Country Status (1)

Country Link
JP (1) JP2005002823A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012087700A (en) * 2010-10-20 2012-05-10 Nissin Kogyo Co Ltd Negative pressure pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012087700A (en) * 2010-10-20 2012-05-10 Nissin Kogyo Co Ltd Negative pressure pump

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