JPH11117883A - Rotary compressor - Google Patents

Rotary compressor

Info

Publication number
JPH11117883A
JPH11117883A JP27882597A JP27882597A JPH11117883A JP H11117883 A JPH11117883 A JP H11117883A JP 27882597 A JP27882597 A JP 27882597A JP 27882597 A JP27882597 A JP 27882597A JP H11117883 A JPH11117883 A JP H11117883A
Authority
JP
Japan
Prior art keywords
vane
tip end
roller
rotary compressor
tip
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.)
Withdrawn
Application number
JP27882597A
Other languages
Japanese (ja)
Inventor
Seiichi Amano
野 誠 一 天
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP27882597A priority Critical patent/JPH11117883A/en
Publication of JPH11117883A publication Critical patent/JPH11117883A/en
Withdrawn legal-status Critical Current

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  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

PROBLEM TO BE SOLVED: To restrain abrasion of the outer peripheral surface of a roller caused by slide motion between itself and a tip end part of a vane. SOLUTION: A rotary compressor is composed of a roller which eccentrically rotates in a cylinder, and a vane pressed against the roller on one side of the cylinder. The tip end part of the vane is formed into a convex curve surface which can slidably abut against the outer peripheral surface of the roller. The vane is produced s follows: A stainless steel material (the tip end has been machined) is roughened in a part excepting a part corresponding to the tip end part of the vane, and then is subjected to heat treatment for quenching and annealing thereof. Thereafter, the material is around after gas intruding treatment, the ground material is finish ground in the part excepting a part corresponding to the tip end part of the vane, and the part corresponding to the tip end is also finish ground. Further, after the final grinding for the tip end part, the material is subjected to barreling so as to complete the production of the vane. In this case, the final grinding of the tip end part of the vane is carried out through the gas nitriding treatment, so that a white layer part is left on the outer surface side of the material.

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、例えば冷凍サイク
ルに用いられるロータリ圧縮機に係り、とりわけ、ガス
窒化処理された金属材料よりなるベーンを備えたロータ
リ圧縮機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor used in, for example, a refrigeration cycle, and more particularly to a rotary compressor provided with a vane made of a metal material subjected to a gas nitriding treatment.

【0002】[0002]

【従来の技術】例えば冷凍サイクルに用いられるロータ
リ圧縮機は、図5に示すように、一般にシリンダ1の一
側においてローラ2に対して押圧されるベーン4を備え
ている。このベーン4の先端部6は、ローラ2の外周面
7に摺動自在に当接する凸曲面をなしている。そして、
このようなベーン4は従来、次の様な方法によって製造
されている。
2. Description of the Related Art A rotary compressor used in a refrigerating cycle, for example, generally has a vane 4 pressed against a roller 2 on one side of a cylinder 1 as shown in FIG. The tip 6 of the vane 4 has a convex curved surface that slidably abuts the outer peripheral surface 7 of the roller 2. And
Conventionally, such a vane 4 is manufactured by the following method.

【0003】すなわち、まずステンレス鋼の材料(先端
部6は加工済み)に対して、先端部6を除く部分の粗加
工が行われる。次に、焼入れ〜焼戻しの熱処理がなされ
た後、先端部その他の研削が行われる。次に、この研削
加工された材料に対してガス窒化処理が行われた後、先
端部6を除く最終研削が行われる。そして、この最終研
削の後、バレル処理が行われ、ベーン4が完成する。
[0003] That is, first, a portion of the stainless steel material (the tip portion 6 has been processed) except for the tip portion 6 is roughly machined. Next, after heat treatment from quenching to tempering is performed, the tip and other parts are ground. Next, after a gas nitriding process is performed on the ground material, final grinding except for the tip 6 is performed. After the final grinding, barrel processing is performed, and the vane 4 is completed.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、このよ
うな従来のロータリ圧縮機では、ベーン4をガス窒化処
理した後、加工の時間・費用等との兼ね合いから先端部
6の最終研削加工を行っていないので、ベーン4の先端
部6の面精度及び真直度が良くない(例えば、面精度
1.6s、真直度4μm程度)。
However, in such a conventional rotary compressor, after the vane 4 is gas-nitrided, the final grinding of the tip 6 is performed in view of the processing time and cost. Therefore, the surface accuracy and straightness of the tip 6 of the vane 4 are not good (for example, the surface accuracy is 1.6 s and the straightness is about 4 μm).

【0005】このようなベーン4の先端部6の面精度及
び真直度の悪さは、摺動部に塩素系の潤滑膜生成が期待
できるHCFC(ハイドロクロロフルオロカーボン)冷
媒を用いる場合には、それ程問題にはならない。しか
し、特に塩素を含まないHFC(ハイドロフルオロカー
ボン)冷媒を用いたり、このHFC冷媒と相溶性のよい
エステル油を冷凍機油に用いたりする場合には、ベーン
4の先端部6と摺動するローラ2の外周面において、鏡
面化を伴う磨耗が増大するという問題がある。
[0005] Such poor surface accuracy and straightness of the tip portion 6 of the vane 4 is a serious problem when using a HCFC (hydrochlorofluorocarbon) refrigerant which can be expected to form a chlorine-based lubricating film for the sliding portion. It does not become. However, when HFC (hydrofluorocarbon) refrigerant containing no chlorine is used, or when ester oil having good compatibility with this HFC refrigerant is used for refrigerating machine oil, the roller 2 sliding with the tip 6 of the vane 4 is used. There is a problem in that the abrasion accompanying mirroring increases on the outer peripheral surface of the.

【0006】本発明は、このような点を考慮してなされ
たものであり、ベーン先端部との摺動によるローラ外周
面の磨耗を低減できるようなロータリ圧縮機を提供する
ことを目的とする。
The present invention has been made in view of the above points, and has as its object to provide a rotary compressor capable of reducing abrasion of a roller outer peripheral surface caused by sliding with a vane tip. .

【0007】[0007]

【課題を解決するための手段】第1の手段は、略円筒形
の内部空間を有するシリンダと、このシリンダ内で偏心
回転されるローラと、前記シリンダの一側において前記
ローラに対して押圧され、その先端部が前記ローラの外
周面に摺動自在に当接する凸曲面をなすベーンとを備
え、前記ベーンは、ほぼ最終形状に形成された金属材料
をガス窒化処理した後に前記先端部の研削を行う工程を
含む製造方法により製造され、当該先端部の研削は、前
記ガス窒化処理により前記金属材料の表面側に形成され
た白層部を残す形で行われることを特徴とするロータリ
圧縮機である。
A first means is a cylinder having a substantially cylindrical internal space, a roller eccentrically rotated in the cylinder, and a roller pressed on one side of the cylinder against the roller. A vane having a convex curved surface whose leading end is slidably abutted on the outer peripheral surface of the roller, wherein the vane is subjected to a gas nitriding process on a metal material formed substantially in a final shape, and then grinding the leading end. The rotary compressor is manufactured by a manufacturing method including a step of performing the step of grinding, and the grinding of the tip portion is performed in a form that leaves a white layer portion formed on the surface side of the metal material by the gas nitriding treatment. It is.

【0008】この第1の手段によれば、ベーンは、ほぼ
最終形状に形成された金属材料をガス窒化処理した後に
先端部の研削を行う工程を含む製造方法により製造さ
れ、当該先端部の研削は、ガス窒化処理により金属材料
の表面側に形成された白層部を残す形で行われるので、
ベーンの先端部の真直度および面精度を従来より大幅に
向上させることができる。
According to the first means, the vane is manufactured by a manufacturing method including a step of performing a gas nitriding process on a metal material formed in a substantially final shape and then grinding the tip portion. Is performed in the form of leaving a white layer formed on the surface side of the metal material by gas nitriding,
The straightness and surface accuracy of the tip of the vane can be greatly improved as compared with the conventional case.

【0009】第2の手段は、上記第1の手段のロータリ
圧縮機を、HFC冷媒を使用する冷凍サイクルに用いた
ものである。
A second means uses the rotary compressor of the first means in a refrigeration cycle using an HFC refrigerant.

【0010】この第2の手段によれば、HFC冷媒を使
用するため、ベーンの先端部とローラの外周面との摺動
部に塩素系の潤滑膜生成を期待することはできないが、
上記第1の手段によってベーンの先端部の真直度および
面精度を向上させることにより、ベーンの先端部との摺
動によるローラ外周面の磨耗を抑えることができる。
According to the second means, since the HFC refrigerant is used, it is not possible to expect the formation of a chlorine-based lubricating film at the sliding portion between the tip of the vane and the outer peripheral surface of the roller.
By improving the straightness and surface accuracy of the tip of the vane by the first means, it is possible to suppress the wear of the outer peripheral surface of the roller due to sliding with the tip of the vane.

【0011】第3の手段は、第2の手段において、冷凍
機油として、HFC冷媒と相溶性の良いエステル油を使
用するものである。
A third means is that, in the second means, an ester oil having good compatibility with the HFC refrigerant is used as the refrigerating machine oil.

【0012】[0012]

【発明の実施の形態】次に、図面を参照して本発明の一
実施形態について説明する。図1乃至図5は本発明によ
るロータリ圧縮機の実施の形態を示す図である。
Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 5 are views showing an embodiment of a rotary compressor according to the present invention.

【0013】まず、図5において、ロータリ圧縮機は、
略円筒形の内部空間を有するシリンダ1と、このシリン
ダ1内でクランク軸3によって偏心回転されるローラ2
とを備えている。また、ロータリ圧縮機は、シリンダ1
の一側においてローラ2に対して押圧されるベーン4を
備えている。このベーン4の先端部6は、ローラ2の外
周面7に対して摺動自在に当接する円筒状の凸曲面をな
している。
First, in FIG. 5, the rotary compressor
A cylinder 1 having a substantially cylindrical internal space, and a roller 2 eccentrically rotated by a crankshaft 3 in the cylinder 1
And Also, the rotary compressor has a cylinder 1
A vane 4 pressed against the roller 2 on one side. The distal end portion 6 of the vane 4 has a cylindrical convex curved surface slidably in contact with the outer peripheral surface 7 of the roller 2.

【0014】なお、このロータリ圧縮機は、例えばHF
C(ハイドロフルオロカーボン)冷媒を使用する冷凍サ
イクルに用いられ、その場合は冷凍機油として、HFC
冷媒と相溶性の良いエステル油が使用される。また、上
記HFC冷媒としては、例えばHFC32(ジフルオロ
メタン)とHFC125(ペンタフルオロエタン)とを
50質量%ずつ混合したHFC410Aが用いられる。
The rotary compressor is, for example, HF
It is used in a refrigeration cycle using C (hydrofluorocarbon) refrigerant.
An ester oil having good compatibility with the refrigerant is used. Further, as the HFC refrigerant, for example, HFC410A in which HFC32 (difluoromethane) and HFC125 (pentafluoroethane) are mixed by 50% by mass is used.

【0015】また、上記ベーン4の材料は、例えばステ
ンレス鋼(+ガス窒化処理)であり、上記ローラ2の材
料は、例えばMo、NiおよびCrを含有する合金鋳鉄
である。
The material of the vane 4 is, for example, stainless steel (+ gas nitriding), and the material of the roller 2 is, for example, an alloy cast iron containing Mo, Ni and Cr.

【0016】ここで、上記ベーン4は、次の様な方法に
よって製造される。すなわち、図1において、まずステ
ンレス鋼の材料(先端部6は加工済み)に対して、先端
部6を除く部分の粗加工が行われる。次に、焼入れ〜焼
戻しの熱処理がなされた後、先端部その他の研削が行わ
れる。この段階でベーン4は、ほぼ図2に示すような最
終形状に形成されている。
Here, the vane 4 is manufactured by the following method. That is, in FIG. 1, first, a roughing process is performed on a portion of the stainless steel material (the distal end portion 6 is already processed) except for the distal end portion 6. Next, after heat treatment from quenching to tempering is performed, the tip and other parts are ground. At this stage, the vane 4 has been formed into a final shape substantially as shown in FIG.

【0017】次に、ほぼ最終形状に形成された材料に対
してガス窒化処理が行われた後、先端部6を除く最終研
削が行われるとともに、先端部6についても最終研削が
行われる。そして、先端部6の最終研削の後、バレル処
理が行われ、ベーン4が完成する。
Next, after the gas formed in the substantially final shape is subjected to the gas nitriding process, the final grinding except for the tip 6 is performed, and the final grinding is also performed for the tip 6. After the final grinding of the distal end portion 6, barrel processing is performed, and the vane 4 is completed.

【0018】この場合、図3に示すように、上記ガス窒
化処理によって、ベーン4の材料の表面付近に網目層部
(比較的硬い窒化層)8が形成され、この網目層部8よ
り外側の材料表面側に白層部(比較的柔らかい窒化層
(ε相部))9が形成される。そして、上記先端部6の
最終研削は、材料の白層部9を残す形で行われる。
In this case, as shown in FIG. 3, a mesh layer portion (relatively hard nitride layer) 8 is formed in the vicinity of the surface of the material of the vane 4 by the gas nitriding treatment. A white layer portion (a relatively soft nitride layer (ε phase portion)) 9 is formed on the surface side of the material. The final grinding of the tip portion 6 is performed in such a manner that the white layer portion 9 of the material is left.

【0019】次に、このような構成よりなる本実施形態
の作用効果について説明する。本実施形態によれば、ベ
ーン4の製造工程において、ガス窒化処理の後、白層部
9を残して先端部6の最終研削が行われるので、ベーン
4の先端部6の真直度および面精度が従来より大幅に向
上する。例えば、図4(a)に示すように、ガス窒化処
理後のベーン4の先端部6において、真直度(図2のX
−X方向で計測したもの)aは4μm程度、面精度は
1.6s程度までそれぞれ悪化するが、図4(b)に示
すように、上記先端部6の最終研削を行った後は、真直
度a′は1μm程度、面精度は0.8s程度までそれぞ
れ改善される。
Next, the operation and effect of this embodiment having the above configuration will be described. According to the present embodiment, in the manufacturing process of the vane 4, after the gas nitriding treatment, the final grinding of the distal end portion 6 is performed while leaving the white layer portion 9, so that the straightness and the surface accuracy of the distal end portion 6 of the vane 4 are performed. Is significantly improved. For example, as shown in FIG. 4 (a), the straightness (X in FIG.
(Measured in the −X direction) a deteriorates to about 4 μm and surface accuracy to about 1.6 s, respectively. However, as shown in FIG. The degree a ′ is improved to about 1 μm, and the surface accuracy is improved to about 0.8 s.

【0020】このことにより、特にHFC冷媒を使用す
る冷凍サイクルに用いる場合に問題となるベーン4の先
端部6との摺動によるローラ2の外周面の鏡面化を伴う
磨耗を、大幅に低減することができる。
As a result, the abrasion of the outer peripheral surface of the roller 2 caused by the sliding with the tip end portion 6 of the vane 4, which is a problem particularly when used in a refrigeration cycle using an HFC refrigerant, is greatly reduced. be able to.

【0021】[0021]

【発明の効果】本発明によれば、ベーンは、ほぼ最終形
状に形成された金属材料をガス窒化処理した後に先端部
の研削を行う工程を含む製造方法により製造され、当該
先端部の研削は、ガス窒化処理により金属材料の表面側
に形成された白層部を残す形で行われるので、ベーンの
先端部の真直度および面精度を従来より大幅に向上させ
ることができる。このため、ベーンの先端部との摺動に
よるローラ外周面の磨耗を大幅に低減することが可能と
なる。
According to the present invention, the vane is manufactured by a manufacturing method including a step of performing a gas nitriding process on a metal material formed in a substantially final shape and then grinding the tip portion. Since the white layer formed on the surface side of the metal material is left by the gas nitriding treatment, the straightness and the surface accuracy of the tip of the vane can be greatly improved as compared with the prior art. Therefore, abrasion of the outer peripheral surface of the roller due to sliding with the tip of the vane can be significantly reduced.

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

【図1】本発明によるロータリ圧縮機の一実施形態にお
いて、そのベーンの製造工程を示すブロック図。
FIG. 1 is a block diagram showing a vane manufacturing process in an embodiment of a rotary compressor according to the present invention.

【図2】図1に示すロータリ圧縮機のベーンの形状を示
す斜視図。
FIG. 2 is a perspective view showing a shape of a vane of the rotary compressor shown in FIG.

【図3】図2に示すベーンの金属組織を模式的に示す横
断面図。
FIG. 3 is a cross-sectional view schematically showing a metal structure of the vane shown in FIG. 2;

【図4】図2に示すベーンの先端部の面精度及び真直度
を模式的に示す図であって、(a)は窒化処理後の最終
研削前、(b)は同じく最終研削後を示す図。
4A and 4B are diagrams schematically showing surface accuracy and straightness of a tip end portion of the vane shown in FIG. 2, wherein FIG. 4A shows a state before final grinding after nitriding, and FIG. FIG.

【図5】ロータリ圧縮機の一般的な構成を示す要部横断
面図。
FIG. 5 is a cross-sectional view of a main part showing a general configuration of a rotary compressor.

【符号の説明】[Explanation of symbols]

1 シリンダ 2 ローラ 3 クランク軸 4 ベーン 6 ベーンの先端部(凸曲面) 7 ローラの外周面 8 網目層部 9 白層部 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Roller 3 Crankshaft 4 Vane 6 Vane tip (convex surface) 7 Outer peripheral surface of roller 8 Mesh layer part 9 White layer part

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】略円筒形の内部空間を有するシリンダと、 このシリンダ内で偏心回転されるローラと、 前記シリンダの一側において前記ローラに対して押圧さ
れ、その先端部が前記ローラの外周面に摺動自在に当接
する凸曲面をなすベーンとを備え、 前記ベーンは、ほぼ最終形状に形成された金属材料をガ
ス窒化処理した後に前記先端部の研削を行う工程を含む
製造方法により製造され、当該先端部の研削は、前記ガ
ス窒化処理により前記金属材料の表面側に形成された白
層部を残す形で行われることを特徴とするロータリ圧縮
機。
1. A cylinder having a substantially cylindrical internal space, a roller eccentrically rotated in the cylinder, and one end of the cylinder pressed against the roller, and a tip end portion thereof has an outer peripheral surface of the roller. A vane having a convex curved surface that slidably contacts the vane, wherein the vane is manufactured by a manufacturing method including a step of performing a gas nitriding process on a metal material formed substantially in a final shape and then grinding the tip end portion. The rotary compressor is characterized in that the tip is ground while leaving a white layer formed on the surface side of the metal material by the gas nitriding treatment.
【請求項2】HFC冷媒を使用する冷凍サイクルに用い
られることを特徴とする請求項1記載のロータリ圧縮
機。
2. The rotary compressor according to claim 1, wherein the rotary compressor is used in a refrigeration cycle using an HFC refrigerant.
【請求項3】冷凍機油としてエステル油を使用すること
を特徴とする請求項2記載のロータリ圧縮機。
3. The rotary compressor according to claim 2, wherein an ester oil is used as the refrigerating machine oil.
JP27882597A 1997-10-13 1997-10-13 Rotary compressor Withdrawn JPH11117883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27882597A JPH11117883A (en) 1997-10-13 1997-10-13 Rotary compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27882597A JPH11117883A (en) 1997-10-13 1997-10-13 Rotary compressor

Publications (1)

Publication Number Publication Date
JPH11117883A true JPH11117883A (en) 1999-04-27

Family

ID=17602689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27882597A Withdrawn JPH11117883A (en) 1997-10-13 1997-10-13 Rotary compressor

Country Status (1)

Country Link
JP (1) JPH11117883A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7127980B2 (en) 2003-05-21 2006-10-31 Aisin Seiki Kabushiki Kaisha Vane, valve timing control device, and sliding member
CN106194667A (en) * 2015-04-30 2016-12-07 江苏白雪电器股份有限公司 Carbon-dioxide gas compressor valve block and manufacture method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7127980B2 (en) 2003-05-21 2006-10-31 Aisin Seiki Kabushiki Kaisha Vane, valve timing control device, and sliding member
CN106194667A (en) * 2015-04-30 2016-12-07 江苏白雪电器股份有限公司 Carbon-dioxide gas compressor valve block and manufacture method thereof

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