JP2771273B2 - Reciprocating compressor - Google Patents
Reciprocating compressorInfo
- Publication number
- JP2771273B2 JP2771273B2 JP1224407A JP22440789A JP2771273B2 JP 2771273 B2 JP2771273 B2 JP 2771273B2 JP 1224407 A JP1224407 A JP 1224407A JP 22440789 A JP22440789 A JP 22440789A JP 2771273 B2 JP2771273 B2 JP 2771273B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- cylinder
- stage
- reciprocating compressor
- 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.)
- Expired - Lifetime
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- Compressor (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は往復動圧縮機の圧縮要素であるピストン、シ
リンダ間で発生する波状音の防止構造に関する。Description: TECHNICAL FIELD The present invention relates to a structure for preventing a wavy sound generated between a piston and a cylinder, which are compression elements of a reciprocating compressor.
従来の往復動圧縮機は、第４図のに示すようにクラン
ク軸３が回転することによりクランク軸３内部の給油孔
3aを通過した油はクランク軸偏心部3bの上端3cより振り
撤かれ、シリンダ１の壁面1aにぶつかり壁面1aを伝わっ
てシリンダ１のピストン挿入入口の面取り加工部1bにた
まり続いてピストン外径部2aに付着した後ピストン２が
往復動する際ぬれ効果でピストン外径部2aとシリンダ内
径部1dの隙間に入る構造となっていた。なお、この種の
往復動圧縮機として関連するものは例えば特開昭56−12
073号が挙げられる。In the conventional reciprocating compressor, as shown in FIG.
The oil that has passed through 3a is shaken off from the upper end 3c of the crankshaft eccentric portion 3b, hits the wall 1a of the cylinder 1, travels along the wall 1a, accumulates in the chamfered portion 1b of the piston insertion inlet of the cylinder 1, and then the piston outer diameter portion When the piston 2 reciprocates after adhering to 2a, the piston 2 enters a gap between the piston outer diameter portion 2a and the cylinder inner diameter portion 1d due to a wetting effect. A reciprocating compressor of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 56-12 / 1981.
No. 073.
上記従来技術は圧縮比の高い場合ピストン外径部2aと
シリンダ内径部1dの隙間からのかにの泡状の微小ガス洩
れにより2500Hz〜5000Hzの波状的な変動音が発生する点
について配慮がされておらず、過渡状態聴感を悪化させ
る騒音上の問題があった。In the above prior art, when the compression ratio is high, consideration is given to the fact that a wavy fluctuating sound of 2500 Hz to 5000 Hz is generated due to a bubble-like minute gas leaking from the gap between the piston outer diameter portion 2a and the cylinder inner diameter portion 1d. However, there was a noise problem that deteriorated the hearing in the transient state.
本発明の目的は上記の2500Hz〜5000Hzの波状的な変動
音の発生を防止することにある。An object of the present invention is to prevent the generation of the above-mentioned 2500 Hz to 5000 Hz wavy fluctuation sound.
上記目的を達成するために、ピストンがシリンダ内を
往復することにより圧縮する機構を有する往復動圧縮機
に於いて、上記ピストンの下死点に対向するシリンダに
角度40゜〜50゜の一段目の面取り部を設け、この一段目
の面取り部と連続し、この一段目の面取り部より小さい
角度10゜〜30゜の二段目の面取り部を上記ピストンの上
死点方向に設けるとともに、この一段目と二段目の面取
り部は、上記ピストンと常に対向してなるものである。In order to achieve the above object, in a reciprocating compressor having a mechanism for compressing a piston by reciprocating in a cylinder, a first stage of the cylinder facing the bottom dead center of the piston has an angle of 40 ° to 50 °. A chamfered portion is provided, and a second-stage chamfered portion having an angle of 10 ° to 30 ° smaller than the first-staged chamfered portion is provided in the direction of the top dead center of the piston. The first and second chamfers are always opposed to the piston.
クランク軸偏心部の上端より振り撤かれた油は、シリ
ンダの壁面にぶつかりこの壁面を伝わってシリンダのピ
ストン挿入口の角度40゜〜50゜の一段目の面取り部に給
油される。この給油された油は角度10゜〜30゜の二段目
の面取り部があり、しかも、ピストンが下死点、上死点
に移動しても、この一段目と二段目の面取り部は常にピ
ストンと対向しているので、二段目の面取り部に一段目
の面取り部の油を流入保持することができる。この二段
目の面取りに保持された油はピストンの往復動により更
に流れがスムーズになりピストン外径部を充分にぬらす
ように動作する。The oil that has been shaken off from the upper end of the eccentric portion of the crankshaft hits the wall surface of the cylinder and travels along the wall surface to be supplied to the first-stage chamfered portion at an angle of 40 ° to 50 ° of the piston insertion port of the cylinder. This lubricated oil has a second-stage chamfer at an angle of 10 ° to 30 °, and even if the piston moves to the bottom dead center and top dead center, the first and second chamfers Since it always faces the piston, the oil in the first-stage chamfered portion can flow into and be held in the second-stage chamfered portion. The oil retained in the second-stage chamfer operates more smoothly by the reciprocating motion of the piston and sufficiently wets the outer diameter portion of the piston.
以下、本発明の一実施例を第１図及び第２図により説
明する。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
クランク軸３が回転することによりクランク軸３内部
の給油孔3aを通過した油はクランク軸偏心部3bの上端3c
よ振りまけられ、シリンダ１の壁面1aにぶつかり壁面1a
から伝わってシリンダ１のピストン挿入入口の一段目の
角度40゜〜50゜の面取り加工部1bにたまり、更にこのた
まった油は二段目の角度10゜〜30゜の面取り加工部1cに
毛細管現象により流入保持され、続いてピストン外径部
2aに付着した後ピストン２が往復動する際ぬれ効果でシ
ール効果を発揮するに充分な量の油がピストン外径部2a
とシリンダ内径部1dの隙間に入る構造となっている。一
段目と二段目の面取り部1b、1cはピストンが下死点であ
っても上死点であっても常にピストンと対向する位置関
係になっている。本実施例によればシリンダ１の角度10
゜〜30゜の二段目の面取り加工部1cによりシリンダ１の
40゜〜50゜の一段目の面取り加工部1bにたまった油が充
分にピストン外径部2aに付着され易くなる。When the crankshaft 3 rotates, the oil that has passed through the oil supply hole 3a inside the crankshaft 3 becomes the upper end 3c of the crankshaft eccentric part 3b.
It is shaken off and hits the wall 1a of the cylinder 1 and the wall 1a
From the piston, and accumulates in the chamfered portion 1b at the first angle of 40 ° to 50 ° at the first stage of the piston insertion inlet of the cylinder 1; Phenomena that the inflow is retained by the phenomenon, and then the outer diameter of the piston
When the piston 2 reciprocates after adhering to 2a, a sufficient amount of oil to exert a sealing effect due to the wetting effect is applied to the piston outer diameter portion 2a.
And the inside of the cylinder inner diameter portion 1d. The first-stage and second-stage chamfered portions 1b and 1c always have a positional relationship facing the piston regardless of whether the piston is at the bottom dead center or the top dead center. According to the present embodiment, the angle 10 of the cylinder 1 is
Cylinder 1 by the second-stage chamfered part 1c
The oil that has accumulated in the first-stage chamfered portion 1b of 40 ° to 50 ° is likely to sufficiently adhere to the piston outer diameter portion 2a.
これによって、2500〜5000Hzの波状的な変動音の発生
を防止できる。As a result, it is possible to prevent the generation of a 2500-5000 Hz wavy fluctuation sound.
本発明によれば、ピストン外径部とシリンダ内径部の
隙間に油を充分供給できるので2500Hz〜5000Hzの波状的
な変動音の発生を防止できる効果がある。According to the present invention, the oil can be sufficiently supplied to the gap between the outer diameter portion of the piston and the inner diameter portion of the cylinder, so that there is an effect that generation of a wavy fluctuation sound of 2500 Hz to 5000 Hz can be prevented.
第１図は本発明に係る往復動圧縮機の圧縮機構部を示す
側断面図、第２図は第１図に示すＡ部の拡大図、第３図
は本発明と従来との騒音レベル比較図、第４図は従来の
往復動圧縮機の圧縮機構部を示す側断面図である。 １……シリンダ、 ２……ピストン、 ３……クランク軸、 1a……シリンダの壁面、 1b……一段目の面取り加工部、 1c……二段目の面取り加工部、 1d……シリンダ内径部、 2a……ピストン外径部、 3a……給油孔、 3b……クランク軸偏心部、 3c……上端。1 is a side sectional view showing a compression mechanism of a reciprocating compressor according to the present invention, FIG. 2 is an enlarged view of a portion A shown in FIG. 1, and FIG. 3 is a noise level comparison between the present invention and a conventional one. FIG. 4 is a sectional side view showing a compression mechanism of a conventional reciprocating compressor. 1 ... Cylinder, 2 ... Piston, 3 ... Crankshaft, 1a ... Cylinder wall surface, 1b ... First-stage chamfered portion, 1c ... Second-stage chamfered portion, 1d ... Cylinder inner diameter portion , 2a ... piston outer diameter part, 3a ... oil supply hole, 3b ... crankshaft eccentric part, 3c ... upper end.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 内田 宏政 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所栃木工場内 (56)参考文献 実公 昭61−11515（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.6，ＤＢ名) F04B 39/00──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiromasa Uchida 800, Tomita, Ohira-cho, Ohira-machi, Shimotsuga-gun, Tochigi Pref. Tochigi Plant, Hitachi, Ltd. (56) References: Real public 1986-11515 (JP, Y2) (58) Field surveyed (Int. Cl. 6 , DB name) F04B 39/00
Claims (1)
より圧縮する機構を有する往復動圧縮機に於いて、上記
ピストンの下死点に対向するシリンダに角度40゜〜50゜
の一段目の面取り部を設け、この一段目の面取り部と連
続し、この一段目の面取り部より小さい角度10゜〜30゜
の二段目の面取り部を上記ピストンの上死点方向に設け
るとともに、この一段目と二段目の面取り部は、上記ピ
ストンと常に対向してなる往復動圧縮機。1. A reciprocating compressor having a mechanism for compressing a piston by reciprocating in a cylinder, wherein the cylinder facing the bottom dead center of the piston is chamfered at a first angle of 40 ° to 50 °. And a second-stage chamfer having an angle of 10 ° to 30 ° smaller than the first-stage chamfer is provided in the direction of the top dead center of the piston. And a reciprocating compressor in which the second-stage chamfer always faces the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224407A JP2771273B2 (en) | 1989-09-01 | 1989-09-01 | Reciprocating compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224407A JP2771273B2 (en) | 1989-09-01 | 1989-09-01 | Reciprocating compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0388975A JPH0388975A (en) | 1991-04-15 |
| JP2771273B2 true JP2771273B2 (en) | 1998-07-02 |
Family
ID=16813282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1224407A Expired - Lifetime JP2771273B2 (en) | 1989-09-01 | 1989-09-01 | Reciprocating compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2771273B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205658B1 (en) * | 2000-11-07 | 2005-06-01 | Ford Global Technologies, LLC | Cylinder block for an internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6111515U (en) * | 1984-06-28 | 1986-01-23 | 愛晃段ボ−ル株式会社 | cardboard box |
-
1989
- 1989-09-01 JP JP1224407A patent/JP2771273B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0388975A (en) | 1991-04-15 |
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