JPH0627544B2 - Compressor piston assembly - Google Patents
Compressor piston assemblyInfo
- Publication number
- JPH0627544B2 JPH0627544B2 JP63303990A JP30399088A JPH0627544B2 JP H0627544 B2 JPH0627544 B2 JP H0627544B2 JP 63303990 A JP63303990 A JP 63303990A JP 30399088 A JP30399088 A JP 30399088A JP H0627544 B2 JPH0627544 B2 JP H0627544B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- groove
- diameter surface
- piston ring
- cylinder
- 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
Links
- 239000010687 lubricating oil Substances 0.000 claims description 21
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は，圧縮機のピストンアセンブリに関し，詳しく
は自動車空調用エアコンプレッサーのピストンアセンブ
リに関する。Description: TECHNICAL FIELD The present invention relates to a piston assembly of a compressor, and more particularly to a piston assembly of an air compressor for automobile air conditioning.
［従来の技術］ 従来，自動車空調用エアコンプレッサーとしてピストン
型のものが使用されている。[Prior Art] Conventionally, a piston type air compressor has been used as an air compressor for automobile air conditioning.
このピストン型圧縮機は，第６図の断面図に示すような
ピストンアセンブリを有する。第６図において，円筒型
シリンダ５１内に，このシリンダ内面５１ａに沿って往
復摺動するピストン本体５２が収容されており，このピ
ストン本体は一端に開口部を有し，他端が封止されてい
る状態の円筒形状を有し，封止端内部に連結棒の球状先
端部５３ａと遊動自在に軸着された軸受部５２ａを有す
る。ピストン外円筒面の封止端寄り及び開口端寄りに
は，このピストン円筒の円周面に沿って一定幅ｌの溝５
２ｃ及び５２ｄが夫々設けられている。これらの溝５２
ｃ及び５２ｄに同形状のピストンリング５４，５４′が
夫々装着されている。これらピストンリング５４，５
４′及びピストン本体５２とで，ピストンアセンブリが
構成される。This piston type compressor has a piston assembly as shown in the sectional view of FIG. In FIG. 6, a piston body 52 that slides back and forth along the cylinder inner surface 51a is housed in a cylindrical cylinder 51. The piston body has an opening at one end and the other end is sealed. It has a cylindrical shape in a closed state, and has a spherical tip portion 53a of the connecting rod and a bearing portion 52a rotatably attached to the shaft inside the sealing end. A groove 5 of constant width 1 is formed along the circumferential surface of the piston cylinder near the sealing end and the opening end of the outer cylinder surface of the piston.
2c and 52d are provided respectively. These grooves 52
Piston rings 54 and 54 'having the same shape are mounted on c and 52d, respectively. These piston rings 54, 5
The piston assembly is constituted by 4'and the piston body 52.
ピストンリング５４，５４′は，第７図に示すように一
定の厚みｔ２と一定の幅ｌ２とを有する円環形状を持つ
継目のないいわゆるシームレスピストンリングで，ピス
トン本体の溝５２ｃ及び５２ｄの底部に内径面５４ｂ，
５４′ｂの一角部が，また溝の一側部に内径面の他の角
部が，また，外径面の一角部が溝の一側部に対向する他
の側部に接するように傾斜して設けられ，互いの外径面
５４ａ，５４ａ′を最寄りのピストン本体の端部に向け
るよう装着されている。The piston rings 54 and 54 'are so-called seamless piston rings having an annular shape having a constant thickness t 2 and a constant width l 2 as shown in FIG. 7, and are formed by grooves 52c and 52d of the piston body. At the bottom of the inner diameter surface 54b,
54'b is inclined so that one corner of the groove is in contact with another corner of the inner diameter surface on one side of the groove and one corner of the outer diameter surface is in contact with the other side opposite to one side of the groove. Are mounted so that their outer diameter surfaces 54a, 54a 'face the end of the nearest piston body.
シリンダ内をピストンアセンブリが往復動する際には，
ピストン本体に装着されたピストンリングの外径面の他
の角部は，シリンダ内面に圧接され，ピストン本体とと
もにシリンダ内部を摺動する。このとき，シリンダ内の
潤滑油は，破線５５で示されるように流下する。すなわ
ち，先ずシリンダ内面５１ａとピストン外円筒面５３ｂ
との間を流下し，溝５２ｃの一側部とピストンリング外
周の角部間を通り抜け，溝５２ｃ内にはいり，溝底部と
ピストンリングの隙間を通りピストンリング内径面とピ
ストン溝側部の隙間を通り，ピストン本体の側面５３ｂ
中央部とシリンダ内面５１ａ間を通って，ピストンリン
グ５４′まで流下しピストンリング５４′とシリンダ内
面５１ａとの隙間を通り，ピストン下方流下し，図示し
ないロータケースに蓄えられる。When the piston assembly reciprocates in the cylinder,
The other corner of the outer diameter surface of the piston ring mounted on the piston body is pressed against the inner surface of the cylinder and slides inside the cylinder together with the piston body. At this time, the lubricating oil in the cylinder flows down as indicated by the broken line 55. That is, first, the cylinder inner surface 51a and the piston outer cylindrical surface 53b.
Between the inner side of the groove 52c and the corner of the outer circumference of the piston ring, and then into the groove 52c, passing through the gap between the groove bottom and the piston ring, and the gap between the inner diameter surface of the piston ring and the side of the piston groove. Through the side 53b of the piston body
It flows down between the center portion and the cylinder inner surface 51a to the piston ring 54 ', passes through the gap between the piston ring 54' and the cylinder inner surface 51a, flows down the piston, and is stored in a rotor case (not shown).
［発明が解決しようとする課題］ しかしながら，前記した従来のピストンアセンブリ，即
ち，ピストンリングを装着したピストン本体は，気密性
が非常に優れているので，一度冷却回路に流出した油が
ロータケースに戻りにくく，圧縮機内の潤滑不足や，こ
れに伴うシステム性能の悪化が生じることがしばしばあ
った。[Problems to be Solved by the Invention] However, since the conventional piston assembly described above, that is, the piston body equipped with the piston ring is very excellent in airtightness, the oil once leaked into the cooling circuit is transferred to the rotor case. It was difficult to return, and there was often insufficient lubrication in the compressor and the resulting deterioration of system performance.
そこで，本発明の技術的課題は，シリンダ内の潤滑油が
ロータケースに戻り易く，機構の潤滑がスムーズに行わ
れる圧縮機のピストンアセンブリを提供することにあ
る。Therefore, a technical object of the present invention is to provide a piston assembly of a compressor in which lubricating oil in a cylinder easily returns to a rotor case and lubrication of a mechanism is smoothly performed.
［課題を解決するための手段］ 本発明によれば，外径面と内径面とこれらの間の両端面
とを有するピストンリングと，前記ピストンリングを装
着するピストン溝を有するピストン本体とを備え，前記
ピストンリングは，前記ピストンに装着する前には，前
記内径面の直径が前記ピストン溝の外径よりも小さいも
のであり，前記両端面が円錐形となり且つ前記外径面が
前記ピストン本体の軸方向一側を向くとともに前記内径
面が前記軸方向他側を向いた姿勢で前記ピストン溝内に
装着され，前記ピストンリングがシリンダ内壁を摺動し
ながらシリンダ内を往復動する圧縮機のピストンアセン
ブリにおいて，前記ピストンリングは，前記両端面のう
ちの少なくとも一方に半径方向に前記外径面及び前記内
径面に渡って設けられた溝と，該溝の端部を含むように
前記外径面と前記内径面のうちの少なくとも一方に，前
記両端面を貫通して設けられた切欠部とを有し，前記ピ
ストンリングによって区画される前記シリンダ内空間の
間に，ブローバイガス力による潤滑油経路を形成するこ
とを特徴とする圧縮機のピストンアセンブリが得られ
る。[Means for Solving the Problems] According to the present invention, it is provided with a piston ring having an outer diameter surface, an inner diameter surface, and both end surfaces between them, and a piston main body having a piston groove for mounting the piston ring. Before the piston ring is mounted on the piston, the diameter of the inner diameter surface is smaller than the outer diameter of the piston groove, the both end surfaces are conical, and the outer diameter surface is the piston body. Of the compressor which is mounted in the piston groove in a posture in which the inner diameter surface faces one side in the axial direction and the other side faces in the axial direction, and the piston ring reciprocates in the cylinder while sliding on the inner wall of the cylinder. In the piston assembly, the piston ring includes a groove provided in at least one of the both end surfaces in a radial direction over the outer diameter surface and the inner diameter surface, and an end portion of the groove. At least one of the outer diameter surface and the inner diameter surface having a notch portion penetrating the both end surfaces, and between the cylinder inner space defined by the piston ring. , A compressor piston assembly characterized by forming a lubricating oil path by blow-by gas force is obtained.
［作 用］ 本発明の圧縮機のピストンアセンブリにおいては，ピス
トン本体のピストン溝に装着されるピストンピストンリ
ングの半径方向に溝を設け，この溝の端部の外径面又は
内径面に切欠部を設けたために，シリンダ内のピストン
上部よりピストン下部への潤滑油経路を形成し，ブロー
バイガスとともに潤滑油が流下することにより，潤滑油
がロータケースに戻り易くなる。[Operation] In the piston assembly of the compressor of the present invention, a groove is provided in the radial direction of the piston piston ring mounted in the piston groove of the piston body, and the notch is formed on the outer diameter surface or the inner diameter surface of the end portion of this groove. Since the oil is provided, the lubricating oil path is formed from the upper part of the piston to the lower part of the piston in the cylinder, and the lubricating oil flows down together with the blow-by gas, so that the lubricating oil easily returns to the rotor case.
［実施例］ 本発明の実施例について図面を参照して説明する。Embodiments Embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の第１の実施例に係る圧縮機のピストン
アセンブリを構成するピストンリングを示す図である。
この図において，ピストンリング１は，継ぎ目のない円
環形状で図示しない厚さｔ１，幅ｌ１を有する。内径面
１ａを４等分する位置に，円形で厚み方向に同形状の切
欠部１ｂ，１ｃ，１ｄ，１ｅ，を有する。FIG. 1 is a diagram showing a piston ring that constitutes a piston assembly of a compressor according to a first embodiment of the present invention.
In this figure, the piston ring 1 has a seamless annular shape and has a thickness t 1 and a width l 1 not shown. Circular cutouts 1b, 1c, 1d, 1e having the same shape in the thickness direction are provided at positions where the inner diameter surface 1a is divided into four equal parts.
ピストンリングの一面で，各切欠部１ｂ，１ｃ，１ｄ，
１ｅより，外径面１ｆに至る半径方向に潤滑油流通溝１
ｇ，１ｈ，１ｉ，１ｊ，が夫夫設けられている。このピ
ストンリングは，ピストン本体に設けられたピストン溝
に外径面をピストン本体の端部に向けるように装着され
る。この場合，シリンダ内面とピストンリング外径面と
は隙間を持たずに接触するので密封性は良好である。
第２図（ａ）は本発明の第２の実施例に係る圧縮機のピ
ストンアセンブリを構成するピストンリングを示す図，
第２図（ｂ）は第２図（ａ）のＡ−Ａ断面図である。On one side of the piston ring, each notch 1b, 1c, 1d,
The lubricating oil flow groove 1 extends in the radial direction from 1e to the outer diameter surface 1f.
Husbands are provided for g, 1h, 1i, and 1j. This piston ring is mounted in a piston groove provided in the piston body with its outer diameter surface facing the end of the piston body. In this case, the inner surface of the cylinder and the outer surface of the piston ring are in contact with each other without a gap, so that the sealing performance is good.
FIG. 2 (a) is a diagram showing a piston ring constituting a piston assembly of a compressor according to a second embodiment of the present invention,
FIG. 2 (b) is a sectional view taken along line AA of FIG. 2 (a).
第２図（ａ）において，ピストンリング２は，円環形状
で，厚さｔ２，幅ｌ２を有する。内径面２ａの円周を２
等分する位置に断面半円状で厚み方向に断面の形状の等
しい切欠部２ｂ及び２ｃを有する。ピストンリングの一
面で，各切欠部２ｂ及び２ｃより，外径面２ｄに至るま
での半径方向に，潤滑油流通溝２ｆ及び２ｇが設けられ
ている。第２図（ｂ）のように，潤滑溝２ｆは，半円状
の断面を有する。この潤滑溝２ｆ，２ｇ及び切欠部は，
断面半円状を有する。このピストンリングは，第１の実
施例と同様のピストン溝に外径面をピストン本体の端部
に向けるように装着される。このとき第２の実施例のピ
ストンリングは，第１の実施例よりも切欠部及び溝数が
少ないので，潤滑油の流下量は少ないが，密封性は第１
の実施例よりも優れている。第３図（ａ）は本発明の第
３の実施例に係る圧縮機のピストンアセンブリを構成す
るピストンリングを示す図，第３図（ｂ）は第３図
（ａ）のＢ−Ｂ断面図である。In FIG. 2 (a), the piston ring 2 has an annular shape and has a thickness t 2 and a width l 2 . Set the circumference of inner diameter surface 2a to 2
Notched portions 2b and 2c having a semicircular cross section and an equal cross sectional shape in the thickness direction are provided at equally divided positions. Lubricating oil flow grooves 2f and 2g are provided on one surface of the piston ring in the radial direction from the notches 2b and 2c to the outer diameter surface 2d. As shown in FIG. 2B, the lubrication groove 2f has a semicircular cross section. The lubricating grooves 2f, 2g and the notch are
It has a semicircular cross section. This piston ring is mounted in the same piston groove as in the first embodiment so that the outer diameter surface faces the end of the piston body. At this time, the piston ring of the second embodiment has a smaller number of notches and grooves than the piston ring of the first embodiment, so that the amount of lubricating oil flowing down is small, but the sealing performance is the same as that of the first embodiment.
Is better than the example. FIG. 3 (a) is a diagram showing a piston ring constituting a piston assembly of a compressor according to a third embodiment of the present invention, and FIG. 3 (b) is a sectional view taken along line BB of FIG. 3 (a). Is.
第３図（ａ）において，ピストンリング３は，円環形状
で厚さｔ３，幅ｌ３とを有する。外径面３ａの円周を４
等分する位置に断面半円状で厚み方向に断面の形状の等
しい切欠部３ｂ，３ｃ，３ｄ，３ｅを有する。ピストン
リングの一面で，各切欠部３ｂ，３ｃ，３ｄ，３ｅより
内径面３ｆに至る迄の半径方向に潤滑油流通溝３ｇ，３
ｈ，３ｉ，３ｊが設けられている。第２図（ｂ）のよう
に，潤滑溝３ｇ，３ｈ，３ｉ，３ｊ及び切欠部３ｂ，３
ｃ，３ｄ，３ｅは，断面半円状を有する。このピストン
リングは，第１及び第２の実施例と同様のピストン溝に
外径面をピストン本体の端部に向けるように装着され
る。この場合外径面は切欠部を有するのでシリンダ内面
接触部に切欠部による隙間ができるので，この部分より
潤滑油が流下し易い。In FIG. 3A, the piston ring 3 has an annular shape and has a thickness t 3 and a width l 3 . The circumference of the outer diameter surface 3a is 4
Notched portions 3b, 3c, 3d, 3e having a semicircular cross section and an equal cross sectional shape in the thickness direction are provided at equally divided positions. On one surface of the piston ring, the lubricating oil flow grooves 3g, 3 are formed in the radial direction from the notches 3b, 3c, 3d, 3e to the inner diameter surface 3f.
h, 3i, 3j are provided. As shown in FIG. 2 (b), the lubricating grooves 3g, 3h, 3i, 3j and the notches 3b, 3
Each of c, 3d, and 3e has a semicircular cross section. This piston ring is mounted in the same piston groove as in the first and second embodiments so that the outer diameter surface faces the end of the piston body. In this case, since the outer diameter surface has a cutout portion, a gap is formed in the cylinder inner surface contact portion due to the cutout portion, so that the lubricating oil easily flows down from this portion.
第４図は本発明の第４の実施例に係る圧縮機のピストン
アセンブリを構成するピストンリングを示す断面図であ
る。FIG. 4 is a sectional view showing a piston ring which constitutes a piston assembly of a compressor according to a fourth embodiment of the present invention.
この図において，ピストンリング４は円環形状で図示し
ない厚さｔ４と図示の幅ｌ４を有する。内径面４ａを４
等分する位置に半円形状で厚み方向に等しい断面の切欠
部４ｂ，４ｃ，４ｄ，４ｅを有する。さらに，切欠部の
位置する内径面と同じ半径上の外径面４ｆを４等分する
位置に半円形状で厚み方向に等しい断面の切欠部４ｇ，
４ｈ，４ｉ，４ｊを有する。また，さらに，この内径面
の切欠部４ｂ，４ｃ，４ｄ，４ｅと外径面の切欠部４
ｇ，４ｈ，４ｉ，４ｊを結ぶように，一面上に半径方向
に夫々設けられた溝４ｋ，４ｌ，４ｍ，４ｎを有する。
このピストンリング４は，ピストン本体のピストン溝に
装着される。In this figure, the piston ring 4 has an annular shape and has a thickness t 4 not shown and a width l 4 shown. Inner diameter surface 4a is 4
Semi-circular cutouts 4b, 4c, 4d, 4e having equal cross sections in the thickness direction are provided at equal positions. Further, a semicircular cutout portion 4g having the same cross section in the thickness direction is formed at a position where the outer diameter surface 4f on the same radius as the cutout portion is divided into four equal parts.
It has 4h, 4i, 4j. Furthermore, the cutout portions 4b, 4c, 4d, 4e on the inner diameter surface and the cutout portion 4 on the outer diameter surface.
Grooves 4k, 4l, 4m, and 4n are provided on one surface in a radial direction so as to connect g, 4h, 4i, and 4j.
The piston ring 4 is mounted in the piston groove of the piston body.
第５図は，第４の実施例に係る圧縮機のピストンアセン
ブリを示す断面図で，第４図のピストンリングの装着状
態を示している。第５図において，シリンダ内に，往復
動をするピストン本体５２が収容されている。幅ｌを有
するピストン本体５２の溝５２ｃ及び５２ｄに第４の実
施例のピストンリング４及びこれと同形状のピストンリ
ング４′が装着されている。ここで，ピストンアセンブ
リは，ピストン本体５２とピストンリング４，４′と
で，構成される。尚，本実施例ではｌ＞ｌ４である。FIG. 5 is a sectional view showing the piston assembly of the compressor according to the fourth embodiment, and shows the mounted state of the piston ring of FIG. In FIG. 5, a piston main body 52 that reciprocates is accommodated in the cylinder. The piston ring 4 of the fourth embodiment and a piston ring 4'having the same shape as that of the piston ring 4 are mounted in the grooves 52c and 52d of the piston body 52 having the width l. Here, the piston assembly is composed of a piston body 52 and piston rings 4, 4 '. In the present embodiment, l> l 4 .
ピストン溝５２ｃ及び５２ｄの底部に内径面４ａ，４
ａ′の一角部が，また溝の一側部に内径面４ｄの他の角
部が，また外径面の一角部が溝の一側部に対向する他の
側部に接するように傾斜して設けられ，互いに外径面を
最寄りのピストン本体５２の端部に向けるよう装着され
ている。潤滑溝４ｋ，４ｌ，４ｍ，４ｎは内側の溝底部
に面するように装着されている。シリンダ内にピストン
本体が往復動する際には，ピストン本体に装着されたピ
ストンリングの外径面の他の角部はシリンダ内面に圧接
されピストン本体とともにシリンダ内部を摺動する。こ
のとき，シリンダ内の潤滑油は，破線５で示されるよう
に，ブローバイガスとともに流下する。Inner diameter surfaces 4a, 4 are provided at the bottoms of the piston grooves 52c and 52d.
a 'is inclined so that one corner of the groove contacts one side of the groove and the other corner of the inner diameter surface 4d contacts one corner of the outer diameter surface of the groove facing the other side of the groove. Are mounted so that their outer diameter surfaces face each other toward the end of the nearest piston body 52. The lubricating grooves 4k, 4l, 4m, 4n are mounted so as to face the inner groove bottoms. When the piston body reciprocates in the cylinder, the other corners of the outer diameter surface of the piston ring mounted on the piston body are pressed against the inner surface of the cylinder and slide inside the cylinder together with the piston body. At this time, the lubricating oil in the cylinder flows down together with the blow-by gas as shown by the broken line 5.
即ち，先ず，シリンダ内面５１ａとピストンリング４，
４′の外円筒面側に設けられた切欠部４ｇ，４ｈ，４
ｉ，４ｊを通り，これと連続する溝４ｍ，４ｎ，４ｋ，
４ｌに沿って，溝底部とピストンリング４，４′との隙
間を通り，ピストン本体５２の溝側部とピストンリング
の切欠部４ｂ，４ｃ，４ｄ，４ｅとの間を夫々通り，ピ
ストン本体側面中央部とシリンダ内面を通って，ピスト
ンリング４′に到達し，ピストンリングの内径面の切欠
部４ｂ′，４ｃ′，４ｄ′，４ｅ′と側壁間でできる隙
間を通り，ピストン本体の溝底部と，ピストンリング面
の隙間を溝４ｋ′４ｌ′，４ｍ′，４ｎ′に沿って流
れ，ピストンリング外径面に設けられたピストンリング
溝に夫々続く切欠部４ｇ′，４ｈ′，４ｉ′，４ｊ′よ
りピストン本体側面とシリンダ間のすき間に夫々流れ，
ピストン本体５２の下方に流下し，図示しないロータケ
ースに蓄えられ。That is, first, the cylinder inner surface 51a, the piston ring 4,
Notches 4g, 4h, 4 provided on the outer cylindrical surface side of 4 '
Grooves 4m, 4n, 4k that pass through i and 4j and are continuous with this
4l, through the gap between the groove bottom and the piston rings 4, 4 ', and between the groove side of the piston body 52 and the notches 4b, 4c, 4d, 4e of the piston ring, respectively, and the side surface of the piston body. It reaches the piston ring 4'through the central portion and the inner surface of the cylinder, and passes through the gap formed between the notch portions 4b ', 4c', 4d ', 4e' of the inner diameter surface of the piston ring and the side wall, and the groove bottom portion of the piston body. And the notches 4g ', 4h', 4i ', which flow through the gaps between the piston ring surfaces along the grooves 4k'4l', 4m ', 4n', and which follow the piston ring grooves provided on the piston ring outer diameter surface, respectively. From 4j ', flow in the gap between the side of the piston body and the cylinder,
It flows down below the piston body 52 and is stored in a rotor case (not shown).
第４の実施例のピストンリングは第１〜第３の実施例の
ピストンリングよりも切欠部の数が多いのでロータケー
ス内への潤滑油の流下量が多い。The piston ring of the fourth embodiment has more notches than the piston rings of the first to third embodiments, and therefore the amount of lubricating oil flowing into the rotor case is large.
尚，第１〜第４の実施例のピストンリングの切欠部及び
溝部は，すべて外又は内径面及び端面に切欠部を有する
ものである。従って，第１〜第４実施例に係るピストン
リングは，外又は内径面及び端面のいずれか一方に切欠
部を有するものよりも，潤滑油の戻り経路が確実に形成
されるので，潤滑油はロータケース内に戻り易くなる。The cutouts and grooves of the piston rings of the first to fourth embodiments all have cutouts on the outer or inner diameter surface and the end surface. Therefore, in the piston rings according to the first to fourth embodiments, the return path of the lubricating oil is formed more surely than the one having the notch in either the outer or inner diameter surface and the end surface, so that the lubricating oil It becomes easy to return to the rotor case.
［発明の効果］ 以上説明したように，本発明によれば，シリンダ内のピ
ストン本体上部よりピストン本体下部への潤滑油経路を
形成し，ブローバイガスとともに潤滑油が流下すること
により，潤滑油がロータケース内に戻り易いので，コン
プレッサー等機構の潤滑を良好に行い，システム性能も
向上する。[Effects of the Invention] As described above, according to the present invention, the lubricating oil passage is formed from the upper part of the piston body to the lower part of the piston body in the cylinder, and the lubricating oil flows down together with the blow-by gas, so that the lubricating oil is Since it is easy to return to the rotor case, the compressor and other mechanisms are lubricated well, and system performance is improved.
又，封入冷媒量の低減も図れる。Also, the amount of the enclosed refrigerant can be reduced.
第１図は本発明の第１実施例に係る圧縮機のピストンア
センブリを構成するピストンリングを示す図，第２図
（ａ）は本発明の第２の実施例に係る圧縮機のピストン
アセンブリを構成するピストンリングを示す図，第２図
（ｂ）は第２図（ａ）のＡ−Ａ断面図，第３図（ａ）は
本発明の第３の実施例に係る圧縮機のピストンアセンブ
リを構成するピストンリングを示す図，第３図（ｂ）は
第３図（ａ）のＢ−Ｂ断面図，第４図は本発明の第４の
実施例に係る圧縮機のピストンアセンブリを構成するピ
ストンリングを示す断面図，第５図は本発明の第４の実
施例に係る圧縮機のピストンアセンブリを示す断面図
で，ピストンリングの装着状態を示している。第６図は
従来例に係る圧縮機のピストンアセンブリを示す断面
図，第７図は第６図のピストンリングを示す正面図であ
る。 図中１，２，３，４，４′はピストンリング，１ａ，２
ａ，３ｆ，４ａは内径面，１ｆ，２ｄ，３ａ，４ｆは外
径面，１ｂ，１ｃ，１ｄ，１ｅ，２ｂ，２ｃ，３ｂ，３
ｃ，３ｄ，３ｅ，４ｂ，４ｂ′，４ｃ，４ｃ′，４ｄ，
４ｄ′，４ｅ，４ｅ′，４ｇ，４ｇ′，４ｈ，４ｈ′，
４ｉ，４ｉ′，４ｊ，４ｊ′は切欠部，１ｇ，１ｈ，１
ｉ，１ｊ，２ｆ，２ｇ，３ｇ，３ｈ，３ｉ，３ｊ，４
ｋ，４ｋ′，４ｌ，４ｌ′，４ｍ，４ｍ′，４ｎ，４
ｎ′は溝，５は潤滑油の流れ方向を示す矢印，５１はシ
リンダ，５１ａはシリンダ内面，５２はピストン本体，
５２ａは軸受，５３ｂはピストン円筒面，５２ｃ及び５
２ｄは溝，５３は連結棒，５４及び５４′はピストンリ
ング，５４ａ及び５４ａ′は外径面，５４ｂ及び５４
ｂ′は内径面，５５は潤滑油の流れ方向を示す矢印であ
る。FIG. 1 is a view showing a piston ring which constitutes a piston assembly of a compressor according to a first embodiment of the present invention, and FIG. 2 (a) is a piston assembly of a compressor according to a second embodiment of the present invention. The figure which shows the piston ring which comprises, FIG.2 (b) is AA sectional drawing of FIG.2 (a), FIG.3 (a) is the piston assembly of the compressor which concerns on the 3rd Example of this invention. Showing a piston ring constituting the above, FIG. 3 (b) is a sectional view taken along the line BB in FIG. 3 (a), and FIG. 4 is a piston assembly of a compressor according to a fourth embodiment of the present invention. 5 is a sectional view showing a piston ring, and FIG. 5 is a sectional view showing a piston assembly of a compressor according to a fourth embodiment of the present invention, showing a mounted state of the piston ring. FIG. 6 is a sectional view showing a piston assembly of a compressor according to a conventional example, and FIG. 7 is a front view showing the piston ring of FIG. In the figure, 1, 2, 3, 4, and 4'are piston rings, 1a and 2
a, 3f, 4a are inner diameter surfaces, 1f, 2d, 3a, 4f are outer diameter surfaces, 1b, 1c, 1d, 1e, 2b, 2c, 3b, 3
c, 3d, 3e, 4b, 4b ', 4c, 4c', 4d,
4d ', 4e, 4e', 4g, 4g ', 4h, 4h',
4i, 4i ', 4j, 4j' are notches, 1g, 1h, 1
i, 1j, 2f, 2g, 3g, 3h, 3i, 3j, 4
k, 4k ', 4l, 4l', 4m, 4m ', 4n, 4
n'is a groove, 5 is an arrow indicating the flow direction of the lubricating oil, 51 is a cylinder, 51a is the inner surface of the cylinder, 52 is the piston body,
52a is a bearing, 53b is a cylindrical surface of the piston, 52c and 5
2d is a groove, 53 is a connecting rod, 54 and 54 'are piston rings, 54a and 54a' are outer diameter surfaces, 54b and 54
Reference numeral b'indicates an inner diameter surface, and 55 is an arrow indicating the direction of flow of the lubricating oil.
Claims (1)
有するピストンリングと，前記ピストンリングを装着す
るピストン溝を有するピストン本体とを備え，前記ピス
トンリングは，前記ピストンに装着する前には，前記内
径面の直径が前記ピストン溝の外径よりも小さいもので
あり，前記両端面が円錐形となり且つ前記外径面が前記
ピストン本体の軸方向一側を向くとともに前記内径面が
前記軸方向他側を向いた姿勢で前記ピストン溝内に装着
され，前記ピストンリングがシリンダ内壁を摺動しなが
らシリンダ内を往復動する圧縮機のピストンアセンブリ
において， 前記ピストンリングは，前記両端面のうちの少なくとも
一方に半径方向に前記内径面及び前記外径面に渡って設
けられた溝と，該溝の端部を含むように前記外径面と前
記内径面のうちの少なくとも一方に，前記両端面を貫通
して設けられた切欠部とを有し，前記ピストンシリンダ
によって区画される前記シリンダ内空間の間に，ブロー
バイガス力による潤滑油経路を形成することを特徴とす
る圧縮機のピストンアセンブリ。1. A piston ring having an outer diameter surface, an inner diameter surface and both end surfaces between them, and a piston body having a piston groove for mounting the piston ring, wherein the piston ring is mounted on the piston. Before, the diameter of the inner diameter surface is smaller than the outer diameter of the piston groove, the both end surfaces are conical, and the outer diameter surface faces one side in the axial direction of the piston body and the inner diameter. In a piston assembly of a compressor, the surface of which is mounted in the piston groove such that the surface faces the other side in the axial direction, and the piston ring reciprocates in the cylinder while sliding on the inner wall of the cylinder. A groove provided in at least one of both end surfaces in the radial direction across the inner diameter surface and the outer diameter surface, and the outer diameter surface and the inner diameter so as to include an end portion of the groove. At least one of the surfaces has a cutout portion penetrating the both end surfaces, and a lubricating oil path by a blow-by gas force is formed between the cylinder internal spaces defined by the piston cylinder. A piston assembly for a compressor, which is characterized in that
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63303990A JPH0627544B2 (en) | 1988-12-02 | 1988-12-02 | Compressor piston assembly |
| AU45808/89A AU634731B2 (en) | 1988-12-02 | 1989-12-01 | Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston |
| KR1019890017919A KR960004632B1 (en) | 1988-12-02 | 1989-12-02 | Piston ring for supplying lubricant into the annular groove of the piston |
| CN89109792A CN1018568B (en) | 1988-12-02 | 1989-12-02 | Piston ring having function which is for facilitating supply of lubricating oil into annular groove of piston |
| EP89312599A EP0377286A1 (en) | 1988-12-02 | 1989-12-04 | Improvements relating to a piston ring |
| CA002004502A CA2004502C (en) | 1988-12-02 | 1989-12-04 | Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston |
| US07/877,384 US5169162A (en) | 1988-12-02 | 1992-04-29 | Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63303990A JPH0627544B2 (en) | 1988-12-02 | 1988-12-02 | Compressor piston assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02180383A JPH02180383A (en) | 1990-07-13 |
| JPH0627544B2 true JPH0627544B2 (en) | 1994-04-13 |
Family
ID=17927718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63303990A Expired - Fee Related JPH0627544B2 (en) | 1988-12-02 | 1988-12-02 | Compressor piston assembly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627544B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4950647U (en) * | 1972-08-12 | 1974-05-04 | ||
| JPS5834269A (en) * | 1981-08-26 | 1983-02-28 | Nippon Carbon Co Ltd | Piston ring of no-oiling compressor |
| JPS58162358U (en) * | 1982-04-26 | 1983-10-28 | 豊田工機株式会社 | sealing device |
| JPS62188536U (en) * | 1986-05-22 | 1987-12-01 |
-
1988
- 1988-12-02 JP JP63303990A patent/JPH0627544B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02180383A (en) | 1990-07-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |