JPH0330745B2 - - Google Patents
Info
- Publication number
- JPH0330745B2 JPH0330745B2 JP60026258A JP2625885A JPH0330745B2 JP H0330745 B2 JPH0330745 B2 JP H0330745B2 JP 60026258 A JP60026258 A JP 60026258A JP 2625885 A JP2625885 A JP 2625885A JP H0330745 B2 JPH0330745 B2 JP H0330745B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- plastic material
- outer surfaces
- deformation
- alternately
- 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
Links
- 239000000463 material Substances 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 5
- 239000005011 phenolic resin Substances 0.000 description 5
- 229920001568 phenolic resin Polymers 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/02—Bearing surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/08—Thermoplastics
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Compressor (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、往復動式冷凍機用ピストンに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a piston for a reciprocating refrigerator.
例えば、中谷、“クロードサイクル軽量小形冷
凍機”、低温工学協会冷凍部会講習会資料、（昭和
55年９月12日）、松原、“Cryoelectronicsの冷凍
システム”、低温工学、第15巻、１号、（1980年）
に記載のように、往復動式膨張機では、シリンダ
室内への熱侵入量を減少させるために、シリンダ
内で往復動するピストンは、断熱性の高いプラス
チツク材で形成されている。
For example, Nakatani, “Claude Cycle Lightweight Compact Refrigerator,” Materials for the Refrigeration Section of the Society of Cryogenics, (Showa
(September 12, 1955), Matsubara, “Refrigerating System of Cryoelectronics”, Cryogenic Engineering, Vol. 15, No. 1, (1980)
As described in , in a reciprocating expander, the piston that reciprocates within the cylinder is made of a highly insulating plastic material in order to reduce the amount of heat intrusion into the cylinder chamber.
しかし、プラスチツク材、例えば、フエノール
樹脂、ナイロン等で形成されたピストンは、温度
や湿度などの変化によりステンレス鋼などの金属
材料の場合の10倍以上にも及ぶ寸法変化や曲りの
発生が見られる。ピストンがこのように変形して
も円滑な運転を継続させるためにはシリンダとピ
ストンとのすきまを予めピストンの変形量を見込
んで拡げておかなければならず、寒冷損失が増大
するという問題があつた。一方、寒冷損失を実用
範囲におさえるためには、運転中のピストンの変
形を減少させなければならないが、このためには
高温でのアニーリングや、常温と低温の間でのヒ
ートサイクル試験などの複雑な処理が必要である
という問題があつた。 However, pistons made of plastic materials, such as phenolic resin and nylon, are subject to dimensional changes and bending that are more than 10 times greater than those made of metal materials such as stainless steel due to changes in temperature and humidity. . In order to continue smooth operation even when the piston is deformed in this way, the gap between the cylinder and the piston must be increased in advance by taking into account the amount of deformation of the piston, which poses the problem of increased cooling loss. Ta. On the other hand, in order to keep the cooling loss within a practical range, it is necessary to reduce the deformation of the piston during operation, but this requires complex processes such as high-temperature annealing and heat cycle tests between room temperature and low temperature. There was a problem that required additional processing.
本発明の目的は、簡単に、ピストンの変形を抑
制できるとともにピストンを軽量化して円滑な運
転を行うことのできる往復動式冷凍機用ピストン
を提供することにある。
An object of the present invention is to provide a piston for a reciprocating refrigerator that can easily suppress deformation of the piston, reduce the weight of the piston, and perform smooth operation.
本発明は、プラスチツク材と糸布とを交互に径
方向に積層するとともに内外表面をプラスチツク
材にして成形した中空管を胴体とし、該胴体の端
部にプラスチツク材と糸布とを交互に積層すると
ともに内外表面をプラスチツク材にして成形した
端板を螺着して往復動式冷凍機用のピストンを構
成することにより、簡単に、ピストンの変形を抑
制できるとともにピストンを軽量化して円滑な運
転が行えるようにしたものである。
The present invention has a hollow tube formed by laminating plastic material and thread cloth alternately in the radial direction and having the inner and outer surfaces made of plastic material as a body, and the ends of the body are alternately laminated with plastic material and thread cloth. By constructing a piston for a reciprocating refrigerator by laminating and screwing end plates molded with plastic on the inner and outer surfaces, it is possible to easily suppress piston deformation, reduce the weight of the piston, and make it smooth. It is designed so that it can be driven.
本発明の一実施例を第１図、第２図により説明
する。
An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
第１図、第２図で、ピストンの胴体部分１０に
はプラスチツク材、例えば、フエノール樹脂１１
と糸布１２とが、この場合、同心円状に交互に積
層され表面つまり内外表面に糸布１２が露出しな
いように成形、例えば、加圧、加熱成形された高
強度で方向性の少ない均質な組織の中空管が使用
されている。また、ピストンの端板部分２０に
は、この場合、糸布入りフエノール樹脂積層棒材
を加圧した平板が使用されている。胴体部分１０
と端板部分２０とは、この場合、ねじで機械的に
結合されている。 1 and 2, the body portion 10 of the piston is made of plastic material, such as phenolic resin 11.
In this case, the yarn cloth 12 is laminated concentrically alternately and formed, for example, under pressure or heat molding, so that the yarn cloth 12 is not exposed on the surface, that is, the inner and outer surfaces, and has high strength and is homogeneous with little directionality. Hollow tubes of tissue are used. Further, in this case, a flat plate made of a pressurized phenolic resin laminated bar material containing thread cloth is used as the end plate portion 20 of the piston. Body part 10
and end plate part 20 are in this case mechanically connected by screws.
第１図、第２図で、ピストンの胴体部分１０に
おいては、その内外表面に糸布１２が露出してお
らず、また、加圧、加熱成形により内外表面に
は、ち密な組織のフエノール樹脂量が形成される
ため、吸湿性が極めて低下している。即ち、この
ような胴体部分１０と内外表面層を除去して糸布
１２を露出させたものとでの吸湿量をそれぞれ測
定した結果、このような胴体部分１０での吸湿量
は、糸布１２を露出させたものでの吸湿量の半分
以下であつた。 In FIGS. 1 and 2, in the body portion 10 of the piston, the thread fabric 12 is not exposed on the inner and outer surfaces thereof, and due to pressure and heat molding, the inner and outer surfaces are covered with phenolic resin with a dense structure. Due to the formation of a large amount of water, the hygroscopicity is extremely reduced. That is, as a result of measuring the amount of moisture absorbed by such a body portion 10 and by removing the inner and outer surface layers to expose the thread fabric 12, it was found that the amount of moisture absorbed by the body portion 10 was as follows. The amount of moisture absorbed was less than half of that of the one exposed.
本実施例では、次のような効果を得ることがで
きる。 In this embodiment, the following effects can be obtained.
プラスチツク材と糸布とを交互に径方向に積層
して成形した中空管を胴体部分として用いること
により、方向性の少ない均質な組織で形成され、
軸方向および径方向に強度が高いピストンが得ら
れる。これにより、曲がりの発生を抑制できると
ともに、強度が高いので、ピストンの肉厚を薄く
してピストンを軽量化することができる。このピ
ストンの軽量化によつて、ピストンの往復運動が
動作しやすくなる。 By using a hollow tube formed by laminating plastic material and thread cloth alternately in the radial direction as the body part, it is formed with a homogeneous structure with little directionality.
A piston with high strength in the axial and radial directions is obtained. As a result, the occurrence of bending can be suppressed, and since the piston has high strength, the wall thickness of the piston can be reduced and the weight of the piston can be reduced. By reducing the weight of the piston, it becomes easier to reciprocate the piston.
また、プラスチツク材と糸布とを交互に積層し
て成形した端板を胴体に螺着して設けることによ
り、簡単な構成でピストンの全体を断熱性の高い
ものとすることができる。これによつて温度差に
よる熱変形も生じにくく、さらに、これらの表面
側をプラスチツク材にしているので、水分の吸湿
を防止でき、湿度等による変形を抑制できる。 In addition, by screwing the end plates formed by alternately laminating plastic materials and thread cloth onto the body, the piston as a whole can be made highly insulating with a simple structure. This makes it difficult to cause thermal deformation due to temperature differences, and since these surfaces are made of plastic material, moisture absorption can be prevented and deformation due to humidity etc. can be suppressed.
このように、簡単な構成でピストンの変形を抑
制できるのでシリンダとピストンとのすきまを最
小限に小さくでき、冷凍装置の寒冷発生手段であ
る膨張機に用いても寒冷損失の増大を抑制でき
る。これとともに、強度が高くピストン胴体の厚
さを薄くすることができるのでピストンを軽量化
でき、円滑な運転を行うことができる。 In this way, since deformation of the piston can be suppressed with a simple configuration, the gap between the cylinder and the piston can be minimized, and an increase in cooling loss can be suppressed even when used in an expander that is a cold generation means of a refrigeration system. In addition, since the piston body has high strength and can be made thinner, the piston can be made lighter and can be operated smoothly.
さらに、ピストンの変形を抑制できるので、高
温でのアニーリングや常温と低温との間でのヒー
トサイクル試験等の複雑な処理を不要にできる。 Furthermore, since deformation of the piston can be suppressed, complex treatments such as high-temperature annealing and heat cycle tests between room temperature and low temperature can be eliminated.
本発明によれば、簡単に、ピストンの変形を抑
制できるとともにピストンを軽量化して円滑な運
転を行うことができるという効果がある。
According to the present invention, deformation of the piston can be easily suppressed, and the weight of the piston can be reduced to allow smooth operation.
第１図は、本発明によるピストンの一実施例を
示す縦断面図、第２図は、第１図の胴体部分の横
断面図である。
１０……胴体部分、１１……フエノール樹脂、
１２……糸布。
FIG. 1 is a longitudinal cross-sectional view showing an embodiment of a piston according to the present invention, and FIG. 2 is a cross-sectional view of the body portion of FIG. 1. 10... body part, 11... phenolic resin,
12... Thread cloth.
Claims (1)
層するとともに内外表面をプラスチツク材にして
成形した中空管を胴体とし、該胴体の端部にプラ
スチツク材と糸布とを交互に積層するとともに内
外表面をプラスチツク材にして成形した端板を螺
着して構成したことを特徴とする往復動式冷凍機
用ピストン。1 The body is a hollow tube formed by laminating plastic material and thread cloth alternately in the radial direction and using plastic materials on the inner and outer surfaces, and the plastic material and thread cloth are alternately laminated at the end of the body. A piston for a reciprocating refrigerator, characterized in that it is constructed by screwing together end plates whose inner and outer surfaces are made of plastic material and which are screwed together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2625885A JPS61189366A (en) | 1985-02-15 | 1985-02-15 | Piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2625885A JPS61189366A (en) | 1985-02-15 | 1985-02-15 | Piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61189366A JPS61189366A (en) | 1986-08-23 |
| JPH0330745B2 true JPH0330745B2 (en) | 1991-05-01 |
Family
ID=12188234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2625885A Granted JPS61189366A (en) | 1985-02-15 | 1985-02-15 | Piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61189366A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962772A (en) * | 1982-09-29 | 1984-04-10 | Nissin Kogyo Kk | Plastic piston for disc brake |
-
1985
- 1985-02-15 JP JP2625885A patent/JPS61189366A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962772A (en) * | 1982-09-29 | 1984-04-10 | Nissin Kogyo Kk | Plastic piston for disc brake |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61189366A (en) | 1986-08-23 |
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