JP2007146790A

JP2007146790A - Compressor

Info

Publication number: JP2007146790A
Application number: JP2005344823A
Authority: JP
Inventors: Kenichi Takeda; 憲一竹田
Original assignee: Sanden Corp
Current assignee: Sanden Corp
Priority date: 2005-11-30
Filing date: 2005-11-30
Publication date: 2007-06-14

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor provided with a rotary shaft, a compression mechanism driven by the rotary shaft, a housing storing the rotary shaft and the compression mechanism, and a shaft seal device sealing a housing penetration part of the rotary shaft, and inhibiting occurrence of a situation that lubricating oil supplied to a sliding contact part of the rotary shaft with the shaft seal device gets short. <P>SOLUTION: This compressor is provided with the rotary shaft, the compression mechanism driven by the rotary shaft, the housing storing the rotary shaft and the compression mechanism, and the shaft seal device sealing the housing penetration part of the rotary shaft. A lubricating oil adsorbing body is mounted on a section adjoining the shaft seal device on a compressor groove side of the shaft seal device of the rotary shaft. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、回転軸と、回転軸により駆動される圧縮機構と、回転軸と圧縮機構とを収容するハウジングと、回転軸のハウジング貫通部を密封する軸封装置とを備える圧縮機に関するものである。 The present invention relates to a compressor including a rotating shaft, a compression mechanism driven by the rotating shaft, a housing that accommodates the rotating shaft and the compression mechanism, and a shaft seal device that seals a housing through portion of the rotating shaft. is there.

回転軸と、回転軸により駆動される圧縮機構と、回転軸と圧縮機構とを収容するハウジングと、回転軸のハウジング貫通部を密封する軸封装置とを備える圧縮機であって、回転軸の軸封装置との摺接部を固体潤滑剤で被覆して、運転動力の低減を図った圧縮機が特許文献１に開示されている。
特許文献１
特開２００５−１５５５９７ A compressor comprising: a rotary shaft; a compression mechanism driven by the rotary shaft; a housing that accommodates the rotary shaft and the compression mechanism; and a shaft sealing device that seals a housing through portion of the rotary shaft. Patent Document 1 discloses a compressor in which a sliding contact portion with a shaft seal device is covered with a solid lubricant to reduce operating power.
Patent Document 1
JP-A-2005-155597

回転軸の軸封装置との摺接部を固体潤滑剤で被覆しても、前記摺接部に供給される潤滑油が不足すると、回転軸の回転に対する軸封装置の摩擦抵抗が増加して圧縮機の運転動力は増加する。また回転軸の軸封装置との摺接部に供給される潤滑油が不足すると、軸封装置のシール性能が低下する。
本発明は上記問題に鑑みてなされたものであり、回転軸と、回転軸により駆動される圧縮機構と、回転軸と圧縮機構とを収容するハウジングと、回転軸のハウジング貫通部を密封する軸封装置とを備える圧縮機であって、回転軸の軸封装置との摺接部に供給される潤滑油が不足する事態の発生が抑制された圧縮機を提供することを目的とする。 Even if the sliding contact portion of the rotating shaft with the shaft seal device is covered with a solid lubricant, if the lubricating oil supplied to the sliding contact portion is insufficient, the friction resistance of the shaft seal device against the rotation of the rotating shaft increases. The operating power of the compressor increases. Further, when the lubricating oil supplied to the sliding contact portion of the rotating shaft with the shaft seal device is insufficient, the sealing performance of the shaft seal device is deteriorated.
The present invention has been made in view of the above problems, and includes a rotation shaft, a compression mechanism driven by the rotation shaft, a housing that accommodates the rotation shaft and the compression mechanism, and a shaft that seals a housing through portion of the rotation shaft. An object of the present invention is to provide a compressor provided with a sealing device, in which occurrence of a shortage of lubricating oil supplied to a sliding contact portion of the rotary shaft with the shaft sealing device is suppressed.

上記課題を解決するために、本発明においては、回転軸と、回転軸により駆動される圧縮機構と、回転軸と圧縮機構とを収容するハウジングと、回転軸のハウジング貫通部を密封する軸封装置とを備え、回転軸の軸封装置よりも圧縮機構側で軸封装置に隣接する部位に、潤滑油吸着体が取り付けられていることを特徴とする圧縮機を提供する。
ハウジング内に貯留された潤滑油は、圧縮機の稼働時に圧縮機構や回転軸を支持する軸受に付着して圧縮機構や軸受の摺動部を潤滑する。圧縮機構や軸受に付着した潤滑油の一部は、回転軸表面に沿って、高圧のハウジング内部から低圧のハウジング外部へ向けて軸封装置側へ流れ、回転軸の軸封装置よりも圧縮機構側で軸封装置に隣接する部位に取り付けられた潤滑油吸着体に吸着され、潤滑油吸着体内に貯留される。潤滑油吸着体内に貯留された潤滑油の一部は、潤滑油吸着体から滲出し、回転軸表面に沿って、低圧のハウジング外部へ向けて流れ、回転軸の軸封装置との摺接部に到達し、該部を潤滑する。潤滑油吸着体は軸封装置に隣接しているので、潤滑油吸着体から滲出した潤滑油は他の部材に吸着されることなく確実に回転軸の軸封装置との摺接部に供給される。
回転軸の軸封装置よりも圧縮機構側で軸封装置に隣接する部位に、潤滑油を貯留する潤滑油吸着体を取り付けたことにより、回転軸の軸封装置との摺接部に供給される潤滑油が不足する事態の発生が抑制される。 In order to solve the above-described problems, in the present invention, a rotating shaft, a compression mechanism driven by the rotating shaft, a housing that accommodates the rotating shaft and the compression mechanism, and a shaft seal that seals a housing penetration portion of the rotating shaft. And a lubricating oil adsorber is attached to a portion adjacent to the shaft seal device on the compression mechanism side of the shaft seal device of the rotary shaft.
The lubricating oil stored in the housing adheres to the bearing that supports the compression mechanism and the rotating shaft during operation of the compressor, and lubricates the sliding portion of the compression mechanism and the bearing. Part of the lubricating oil adhering to the compression mechanism and bearing flows along the surface of the rotating shaft from the inside of the high-pressure housing toward the outside of the low-pressure housing toward the shaft sealing device, and is more compact than the shaft sealing device of the rotating shaft. On the side, it is adsorbed by a lubricating oil adsorbing body attached to a portion adjacent to the shaft seal device and stored in the lubricating oil adsorbing body. Part of the lubricating oil stored in the lubricating oil adsorbing body oozes out from the lubricating oil adsorbing body, flows toward the outside of the low pressure housing along the surface of the rotating shaft, and is in sliding contact with the shaft seal device of the rotating shaft. And the part is lubricated. Since the lubricating oil adsorbing body is adjacent to the shaft seal device, the lubricating oil that has oozed out from the lubricating oil adsorbing material is reliably supplied to the sliding contact portion of the rotating shaft with the shaft sealing device without being adsorbed by other members. The
By attaching a lubricant adsorbing body for storing lubricating oil to a portion adjacent to the shaft seal device on the compression mechanism side of the shaft seal device of the rotating shaft, it is supplied to the sliding contact portion with the shaft seal device of the rotating shaft. Occurrence of a shortage of lubricating oil is suppressed.

本発明に係る圧縮機においては、回転軸の軸封装置よりも圧縮機構側で軸封装置に隣接する部位に、潤滑油を貯留する潤滑油吸着体を取り付けることにより、回転軸の軸封装置との摺接部に供給される潤滑油が不足する事態の発生を抑制している。 In the compressor according to the present invention, by attaching a lubricating oil adsorber for storing lubricating oil to a portion adjacent to the shaft sealing device on the compression mechanism side of the shaft sealing device of the rotating shaft, the shaft sealing device of the rotating shaft Occurrence of a shortage of lubricating oil supplied to the sliding contact portion is suppressed.

本発明の実施例に係る圧縮機を説明する。 A compressor according to an embodiment of the present invention will be described.

図１に示すように、可変容量型斜板式圧縮機Ａは、回転軸１０と、回転軸１０に固定されたローター１１と、傾角可変に回転軸１０に支持された斜板１２とを備えている。斜板１２は、斜板１２の傾角変動を許容するリンク機構１３を介してローター１１に連結され、ローター１１ひいては回転軸１０に同期して回転する。
斜板１２の周縁部に摺接する一対のシュー１４を介してピストン１５が斜板１２に係合している。
ピストン１５は、シリンダブロック１６に形成されたボア１６ａに挿入されている。
ローター１１、斜板１２、シュー１４、ピストン１５は、回転軸１０により駆動される圧縮機構を形成している。
回転軸１０、ローター１１、斜板１２を収容するクランク室１７を形成する有底円筒状のフロントハウジング１８が配設されている。回転軸１０は、フロントハウジング１８を貫通して外部へ延びている。回転軸１０のフロントハウジング貫通部を密封するリップシールを有する軸封装置１９が配設されている。
回転軸１０の、軸封装置１９よりも圧縮機構側で軸封装置１９に隣接する部位に、ガラス繊維、ポリエステル繊維等の不織布、ポリプロピレン、ポリエチレン等の樹脂多孔体等の素材を用いて製造した円環状の潤滑油吸着体２０が、外嵌合固定されている。
フロントハウジング１８に取り付けられた電磁クラッチ２１を介して図示しない外部駆動源から回転軸１０の先端部に回転動力が伝達される。
吸入室と吐出室とを形成するシリンダヘッド２２が配設されている。
シリンダブロック１６とシリンダヘッド２２との間にボア１６ａに連通する吸入穴と吐出穴とが形成された弁板２３が配設されている。吸入穴を開閉する吸入弁と吐出穴を開閉する吐出弁とが配設されている。
フロントハウジング１８、シリンダブロック１６、弁板２３、シリンダヘッド２２は、ボルト２４により一体に組み付けられ、圧縮機構を収容するハウジングを形成している。
回転軸１０はフロントハウジング１８、シリンダブロック１６により回転可能に支持されている。 As shown in FIG. 1, the variable capacity swash plate compressor A includes a rotating shaft 10, a rotor 11 fixed to the rotating shaft 10, and a swash plate 12 supported on the rotating shaft 10 so that the tilt angle is variable. Yes. The swash plate 12 is connected to the rotor 11 via a link mechanism 13 that allows the tilt angle of the swash plate 12 to vary, and rotates in synchronization with the rotor 11 and thus the rotating shaft 10.
The piston 15 is engaged with the swash plate 12 through a pair of shoes 14 that are in sliding contact with the peripheral edge of the swash plate 12.
The piston 15 is inserted into a bore 16 a formed in the cylinder block 16.
The rotor 11, the swash plate 12, the shoe 14, and the piston 15 form a compression mechanism that is driven by the rotary shaft 10.
A bottomed cylindrical front housing 18 that forms a crank chamber 17 that houses the rotating shaft 10, the rotor 11, and the swash plate 12 is disposed. The rotating shaft 10 extends through the front housing 18 to the outside. A shaft seal device 19 having a lip seal that seals the front housing through portion of the rotary shaft 10 is disposed.
The rotating shaft 10 is manufactured using a material such as a nonwoven fabric such as glass fiber or polyester fiber, or a porous resin material such as polypropylene or polyethylene at a portion adjacent to the shaft sealing device 19 on the compression mechanism side of the shaft sealing device 19. An annular lubricating oil adsorbing body 20 is externally fitted and fixed.
Rotational power is transmitted from an external drive source (not shown) to the tip of the rotary shaft 10 via an electromagnetic clutch 21 attached to the front housing 18.
A cylinder head 22 that forms a suction chamber and a discharge chamber is disposed.
A valve plate 23 having a suction hole and a discharge hole communicating with the bore 16 a is disposed between the cylinder block 16 and the cylinder head 22. A suction valve that opens and closes the suction hole and a discharge valve that opens and closes the discharge hole are disposed.
The front housing 18, the cylinder block 16, the valve plate 23, and the cylinder head 22 are assembled together by bolts 24 to form a housing that houses the compression mechanism.
The rotary shaft 10 is rotatably supported by a front housing 18 and a cylinder block 16.

可変容量型斜板式圧縮機Ａにおいては、図示しない外部駆動源の回転動力が電磁クラッチ２１を介して回転軸１０に伝達され、回転軸１０の回転がローター１１、リンク機構１３を介して斜板１２に伝達される。斜板１２の回転に伴う斜板１２周縁部の回転軸１０延在方向の往復動が、シュー１４を介してピストン１５に伝達され、ピストン１５がボア１６ａ内で往復動する。外部冷凍回路から還流した冷媒が、シリンダヘッド２２に形成された吸入ポートと吸入室と吸入穴と吸入弁とを介してボア１６ａへ吸入され、ボア１６ａ内で圧縮され、吐出穴と吐出弁と吐出室とシリンダヘッド２２に形成された吐出ポートとを介して外部冷凍回路へ流出する。
クランク室１７内に貯留された潤滑油が、可変容量型斜板式圧縮機Ａの稼働時に、圧縮機構や回転軸１０を支持する軸受に付着して圧縮機構や軸受の摺動部を潤滑する。圧縮機構や軸受に付着した潤滑油の一部は、回転軸１０の表面に沿って、高圧のクランク室１７から低圧のフロントハウジング１８外部へ向けて軸封装置１９側へ流れ、回転軸１０の軸封装置１９よりも圧縮機構側で軸封装置１９に隣接する部位に取り付けられた潤滑油吸着体２０に吸着され、潤滑油吸着体２０内に貯留される。潤滑油吸着体２０内に貯留された潤滑油の一部は、潤滑油吸着体２０から滲出し、回転軸１０の表面に沿って、低圧のフロントハウジング１８外部へ向けて流れ、回転軸１０の軸封装置１９との摺接部に到達し、該部を潤滑する。潤滑油吸着体２０は軸封装置１９に隣接しているので、潤滑油吸着体２０から滲出した潤滑油は他の部材に吸着されることなく確実に回転軸１０の軸封装置１９との摺接部に供給される。潤滑油吸着体２０内に貯留された潤滑油の他の一部は、回転軸１０が回転する際に発生する遠心力を受けて径方向外方へ飛散し、フロントハウジング１８に形成された回転軸挿通穴の周壁に付着し、当該周壁から軸封装置１９を伝って、回転軸１０の軸封装置１９との摺接部に供給される。
上記説明から分かるように、回転軸１０の軸封装置１９よりも圧縮機構側で軸封装置１９に隣接する部位に、潤滑油を貯留する潤滑油吸着体２０を取り付けたことにより、回転軸１０の軸封装置１９との摺接部に供給される潤滑油が不足する事態の発生が抑制される。 In the variable capacity swash plate compressor A, the rotational power of an external drive source (not shown) is transmitted to the rotary shaft 10 via the electromagnetic clutch 21, and the rotation of the rotary shaft 10 is transferred to the swash plate via the rotor 11 and the link mechanism 13. 12 is transmitted. The reciprocating motion in the extending direction of the rotating shaft 10 at the peripheral edge of the swash plate 12 accompanying the rotation of the swash plate 12 is transmitted to the piston 15 via the shoe 14, and the piston 15 reciprocates in the bore 16a. The refrigerant recirculated from the external refrigeration circuit is sucked into the bore 16a through a suction port, a suction chamber, a suction hole, and a suction valve formed in the cylinder head 22, and compressed in the bore 16a. It flows out to the external refrigeration circuit through the discharge chamber and the discharge port formed in the cylinder head 22.
When the variable capacity swash plate compressor A is in operation, the lubricating oil stored in the crank chamber 17 adheres to the compression mechanism and the bearing that supports the rotary shaft 10 and lubricates the compression mechanism and the sliding portion of the bearing. A part of the lubricating oil adhering to the compression mechanism and the bearing flows along the surface of the rotary shaft 10 from the high-pressure crank chamber 17 to the outside of the low-pressure front housing 18 to the shaft seal device 19 side. It is adsorbed by the lubricant adsorbing body 20 attached to the portion adjacent to the shaft seal device 19 on the compression mechanism side with respect to the shaft seal device 19 and stored in the lubricant adsorbing body 20. Part of the lubricating oil stored in the lubricating oil adsorbing body 20 oozes out from the lubricating oil adsorbing body 20 and flows toward the outside of the low-pressure front housing 18 along the surface of the rotating shaft 10. It reaches the sliding contact portion with the shaft seal device 19 and lubricates the portion. Since the lubricating oil adsorbing body 20 is adjacent to the shaft seal device 19, the lubricating oil that has oozed out of the lubricating oil adsorbing body 20 is reliably slid with the shaft sealing device 19 of the rotating shaft 10 without being adsorbed by other members. Supplied to the contact. The other part of the lubricating oil stored in the lubricating oil adsorbing body 20 receives the centrifugal force generated when the rotating shaft 10 rotates and scatters outward in the radial direction, and the rotation formed in the front housing 18. It adheres to the peripheral wall of the shaft insertion hole, passes through the shaft seal device 19 from the peripheral wall, and is supplied to the sliding contact portion of the rotary shaft 10 with the shaft seal device 19.
As can be seen from the above description, by attaching the lubricating oil adsorbing body 20 for storing lubricating oil to a portion adjacent to the shaft sealing device 19 on the compression mechanism side of the shaft sealing device 19 of the rotary shaft 10, Occurrence of a shortage of lubricating oil supplied to the sliding contact portion with the shaft seal device 19 is suppressed.

本発明は斜板式圧縮機のみならず、回転軸と、回転軸により駆動される圧縮機構と、回転軸と圧縮機構とを収容するハウジングと、回転軸のハウジング貫通部を密封する軸封装置とを備える圧縮機、例えばスクロール式圧縮機、等にも広く利用可能である。 The present invention is not limited to a swash plate compressor, and includes a rotation shaft, a compression mechanism driven by the rotation shaft, a housing that accommodates the rotation shaft and the compression mechanism, and a shaft seal device that seals a housing through portion of the rotation shaft. It can be widely used for a compressor provided with, for example, a scroll type compressor.

本発明の実施例に係る可変容量型斜板式圧縮機の断面図である。1 is a cross-sectional view of a variable capacity swash plate compressor according to an embodiment of the present invention.

Explanation of symbols

Ａ可変容量型斜板式圧縮機
１０回転軸
１１ローター
１２斜板
１３リンク機構
１４シュー
１５ピストン
１８フロントハウジング
１９リップシール
２０潤滑油吸着体 A Variable displacement swash plate compressor 10 Rotating shaft 11 Rotor 12 Swash plate 13 Link mechanism 14 Shoe 15 Piston 18 Front housing 19 Lip seal 20 Lubricating oil adsorber

Claims

A rotation shaft, a compression mechanism driven by the rotation shaft, a housing that accommodates the rotation shaft and the compression mechanism, and a shaft seal device that seals a housing through portion of the rotation shaft; A compressor characterized in that a lubricant adsorbing body is attached to a portion adjacent to the shaft seal device on the compression mechanism side.