JPH0138178B2 - - Google Patents
Info
- Publication number
- JPH0138178B2 JPH0138178B2 JP19562283A JP19562283A JPH0138178B2 JP H0138178 B2 JPH0138178 B2 JP H0138178B2 JP 19562283 A JP19562283 A JP 19562283A JP 19562283 A JP19562283 A JP 19562283A JP H0138178 B2 JPH0138178 B2 JP H0138178B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- space
- gas
- cylinder
- pressure
- 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
Links
- 241000287181 Sturnus vulgaris Species 0.000 claims 1
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/0435—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines the engine being of the free piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2243/00—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
- F02G2243/02—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having pistons and displacers in the same cylinder
- F02G2243/24—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having pistons and displacers in the same cylinder with free displacers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2270/00—Constructional features
- F02G2270/40—Piston assemblies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はスターリング機関、特にフリーピスト
ン型スターリング機関に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a Stirling engine, in particular to a free-piston Stirling engine.
従来例の構成とその問題点
熱エネルギーを機械的動力に変換する熱機関に
あつては、シリンダーとその中を運動するピスト
ンとは不可欠な構成要素である。Conventional configuration and its problems In a heat engine that converts thermal energy into mechanical power, a cylinder and a piston that moves within the cylinder are essential components.
ピストンはシリンダー中で滑らかに運動し、運
動に伴うシリンダー内壁とピストン外壁との摩擦
による損失は極力少でなければならない。さもな
ければ機関の効率が低下し、甚だしいときはピス
トンが動かなくなつて実用不能となるからであ
る。現在広く使用されている内燃機関にあつて
は、この摩擦による損失を減少させるために潤滑
油が使用されている。又液体の使用が不適当な場
合には二硫化モリブデン粉末などの固体潤滑剤が
使用されている。 The piston must move smoothly in the cylinder, and losses due to friction between the inner wall of the cylinder and the outer wall of the piston during movement must be as small as possible. Otherwise, the efficiency of the engine will decrease, and in extreme cases, the piston will stop moving, making it impractical. In internal combustion engines that are currently widely used, lubricating oil is used to reduce losses due to friction. If the use of liquid is inappropriate, solid lubricants such as molybdenum disulfide powder are used.
しかし、閉じた系内にあつて膨張空間と圧縮空
間との間を作動流体が往復し、その間に熱交換の
ための再生器が設けられているスターリング機関
にあつては潤滑油や固体潤滑剤を使用すると、こ
れらの潤滑用材料が作動流体中に混じて移動し、
再生器内を通過するため、通状網状又はウール状
の金属が充填されている再生器内部でいわゆる目
づまりを生じ、耐用年数を著しく低下せしめるこ
ととなる。 However, in the case of a Stirling engine, which is a closed system in which the working fluid reciprocates between the expansion space and the compression space, and a regenerator is provided for heat exchange between them, lubricating oil or solid lubricant is used. When using , these lubricating materials mix with the working fluid and move.
Since it passes through the regenerator, so-called clogging occurs inside the regenerator, which is filled with metal in the form of a mesh or wool, significantly reducing its service life.
この欠点を除く方法として気体軸受の方法があ
る。即ちピストンとシリンダーとの間隙に加圧気
体を供給し、ピストンとシリンダーとが直接接触
するのを防ぐ方法である。従来は第１図に示す如
く、シリンダー１４内にデイスプレーサーとコン
プレツサーを可動的に配し、シリンダー１４の前
記ピストンに位置する部分を貫通する小孔１６を
設け、これを通して外部よりピストン−シリンダ
ー間隙に加圧気体を供給していた。デイスプレー
サ１１１の上下空間は再生器１２を介して連通さ
せている。然しこれでは加圧気体を供給するため
のコンプレツサー１５を余分に必要とすると言う
欠点があつた。 A gas bearing method is available as a method to eliminate this drawback. That is, this method supplies pressurized gas to the gap between the piston and cylinder to prevent the piston and cylinder from coming into direct contact. Conventionally, as shown in FIG. 1, a displacer and a compressor are movably disposed within a cylinder 14, and a small hole 16 is provided that penetrates the portion of the cylinder 14 that is located in the piston, through which the piston and cylinder can be connected from the outside. Pressurized gas was supplied to the gap. The space above and below the displacer 111 is communicated with each other via the regenerator 12. However, this method has the disadvantage of requiring an extra compressor 15 for supplying pressurized gas.
更に通常のスターリング機関では出力及び効率
を向上させるために作動流体の圧力は10Kg／cm2〜
150Kg／cm2とする場合が多いからコンプレツサー
もこの程度の耐圧を有する構造のものを使用しな
ければならず高価なものとならざるを得ないと言
う欠点もあつた。 Furthermore, in a normal Stirling engine, the pressure of the working fluid is 10Kg/cm 2 ~ to improve output and efficiency.
Since the pressure is often 150 kg/cm 2 , the compressor must be constructed to withstand this level of pressure, which also has the drawback of making it expensive.
発明の目的
本発明は上記欠点に鑑み、ピストンに若干の工
作を施すことによつて高価なコンプレツサーを別
に設けることなく、気体軸受と同様な効果のある
ピストン摺動部を有するスターリング機関を提供
するすることを目的とする。Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a Stirling engine having a piston sliding part that has the same effect as a gas bearing without the need for a separate expensive compressor by slightly modifying the piston. The purpose is to
発明の構成
本発明はスターリング機関のピストンの内部に
空間を設け、その上底面と下底面とに逆止弁を設
け、ピストンの往復運動に伴い逆止弁を通じて、
ピストン内部空間の気体を加圧し、この加圧気体
をピストン壁に設けた小孔を通じてシリンダ−ピ
ストン間空隙内に流出せしめ、従来の気体軸受と
同様な働きをせしめて高価なコンプレツサーを別
に設置することなく、ピストンの滑らかな往復運
動を可能としたものである。Structure of the Invention The present invention provides a space inside the piston of a Stirling engine, and provides check valves on the upper and lower surfaces of the piston.
The gas in the internal space of the piston is pressurized, and this pressurized gas is made to flow into the gap between the cylinder and piston through a small hole in the piston wall, so that it functions in the same way as a conventional gas bearing, and an expensive compressor is installed separately. This enables smooth reciprocating movement of the piston without any friction.
実施例の説明
以下本発明について図面を参照しながら説明す
る。第２図は本発明によるスターリング機関の要
部を模式的に示した図である。第２図において、
２１はデイスプレーサー、２２は再生器、２３は
ピストン、２４はコンプレツシヨン空間、２５は
バウンス空間、２６はコンプレツシヨン空間側に
設けられた逆止弁、２７はバウンス空間側に設け
られた逆止弁、２８はピストン内空間、２９はピ
ストン内空間、２９はピストン−シリンダー間間
隙、３０はピストン壁に設けられた加圧気体噴出
用の小孔を夫々示す。DESCRIPTION OF EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 2 is a diagram schematically showing the main parts of the Stirling engine according to the present invention. In Figure 2,
21 is a displacer, 22 is a regenerator, 23 is a piston, 24 is a compression space, 25 is a bounce space, 26 is a check valve provided on the compression space side, and 27 is provided on the bounce space side. 28 is a piston internal space, 29 is a piston internal space, 29 is a gap between the piston and the cylinder, and 30 is a small hole provided in the piston wall for ejecting pressurized gas.
次に動作について説明する。この様な構造のフ
リーピストン型スターリング機関にあつては、デ
イスプレーサー２１とピストン２３とが一定の位
相差を有しながら、シリンダー３１中で往復運動
を行う。ピストンのみに着目すれば、コンプレツ
シヨン空間２４とバウンス空間２５との圧力差に
よつてピストンは往復運動を行うとみなすことも
できる。まずコンプレツシヨン空間２４の圧力が
バウンス空間２５の圧力よりも高い場合を考え
る。ピストン２３はコンプレツシヨン空間２４よ
りバウンス空間２５の方へ移動する、このときバ
ウンス空間２５の圧力がピストン内空間２８の圧
力よりも大なるときにはバウンス空間２５内の気
体は逆止弁２９を通つてピストン内空間２８内へ
流入しピストン内空間２８内の圧力を高める。ピ
ストン２３はコンプレツシヨン空間２４とバウン
ス空間２５との圧力差に依つて、更にバウンス空
間２５側へ移動を続ける、この間逆止弁２６は閉
じたままであるが、この過程の終り近くになつて
バウンス空間の気体が圧縮され、バウンス空間２
５内の気体の圧力が、ピストン内空間２８内の気
体の圧力より更に大きくなると逆止弁２９を通じ
てピストン内空間２８内に気体が流入し続け、こ
の空間内の圧力が更に高められる。ピストン内空
間２８の圧力がコンプレツシヨン空間２５の圧力
よりも大となるときは逆止弁２９は閉じてピスト
ン内空間２８の圧力が低下するのを妨げる。ピス
トン２３がバウンス空間２５側へ十分に移動し、
デイスプレーサー２１の運動と相まつてコンプレ
ツサー空間２４の圧力が低下するとバウンス空間
２５とコンプレツサー空間２４との圧力差により
ピストンは逆方向に運動をし始め、逆止弁２６の
同様な動作によつてピストン内空間２８は加圧さ
れる。この様にして加圧された気体はピストン２
３の摺動壁に設けられた小孔３０を通じてピスト
ン−シリンダー間間隙２７中へ流出し気体軸受が
形成される。 Next, the operation will be explained. In a free piston type Stirling engine having such a structure, the displacer 21 and the piston 23 reciprocate in the cylinder 31 while having a certain phase difference. Focusing only on the piston, it can be considered that the piston reciprocates due to the pressure difference between the compression space 24 and the bounce space 25. First, consider the case where the pressure in the compression space 24 is higher than the pressure in the bounce space 25. The piston 23 moves from the compression space 24 toward the bounce space 25. At this time, when the pressure in the bounce space 25 is greater than the pressure in the piston internal space 28, the gas in the bounce space 25 passes through the check valve 29. The liquid then flows into the piston internal space 28 and increases the pressure within the piston internal space 28. The piston 23 continues to move further toward the bounce space 25 due to the pressure difference between the compression space 24 and the bounce space 25. During this time, the check valve 26 remains closed, but near the end of this process, the piston 23 continues to move toward the bounce space 25. The gas in the bounce space is compressed, and the bounce space 2
When the pressure of the gas in the piston 5 becomes higher than the pressure of the gas in the piston inner space 28, the gas continues to flow into the piston inner space 28 through the check valve 29, and the pressure in this space is further increased. When the pressure in the piston interior space 28 becomes greater than the pressure in the compression space 25, the check valve 29 closes to prevent the pressure in the piston interior space 28 from decreasing. The piston 23 sufficiently moves toward the bounce space 25,
When the pressure in the compressor space 24 decreases together with the movement of the displacer 21, the piston begins to move in the opposite direction due to the pressure difference between the bounce space 25 and the compressor space 24, and a similar operation of the check valve 26 causes the piston to move in the opposite direction. The piston interior space 28 is pressurized. The gas pressurized in this way is transferred to the piston 2
The gas flows out into the piston-cylinder gap 27 through a small hole 30 provided in the sliding wall 3, forming a gas bearing.
発明の効果
以上のように本発明によれば、ピストン内に空
間を設け、その出入口に逆止弁を取付けることに
よりピストンの往復運動に伴つて気体が加圧さ
れ、別に高価なコンプレツサーを設置することな
しに必要な加圧気体を得ることができ、滑かに動
作する気体軸受を形成せしめることができる。Effects of the Invention As described above, according to the present invention, a space is provided in the piston and a check valve is attached to the inlet and outlet of the space, so that gas is pressurized as the piston reciprocates, and a separate expensive compressor is not installed. The necessary pressurized gas can be obtained without any trouble, and a gas bearing that operates smoothly can be formed.
更に、従来のスターリング機関ではシリンダー
側に小孔を設け気体を流出せしめているためピス
トンの一端が小孔の位置を外れることのないよう
にピストン運動の振幅が制限されるが、本発明で
はピストン側に小孔を設けているため、気体流出
の小孔は常にピストンの移動とともに移動し、ピ
ストン運動の振幅如何にかかわらず気体流出孔が
ピストン−シリンダー間隙より逸脱すると言う不
都合はないなど実用的効果は大なるものがある。 Furthermore, in the conventional Stirling engine, a small hole is provided on the cylinder side to allow gas to flow out, so the amplitude of the piston movement is limited so that one end of the piston does not move out of the small hole. Because the small hole is provided on the side, the small gas outflow hole always moves with the movement of the piston, and there is no problem that the gas outflow hole will deviate from the piston-cylinder gap regardless of the amplitude of the piston movement, making it practical. The effects are huge.
第１図は従来の気体軸受方式を採用したフリー
ピストン型スターリング機関を模式的に示した
図、第２図は本発明のフリーピストン型スターリ
ング機関を模式的に示した図である。
２３……ピストン、２４……コンプレツシヨン
空間、２５……バウンス空間、２６……逆止弁、
２７……ピストン−シリンダー間間隙、２８……
ピストン内空間、２９……バウンス空間側逆止
弁、３０……小孔。
FIG. 1 is a diagram schematically showing a free piston type Stirling engine employing a conventional gas bearing system, and FIG. 2 is a diagram schematically showing a free piston type Stirling engine according to the present invention. 23... Piston, 24... Compression space, 25... Bounce space, 26... Check valve,
27... Piston-cylinder gap, 28...
Piston inner space, 29...Bounce space side check valve, 30...Small hole.
Claims (1)
に逆止弁を取付け、ピストンの往復運動により前
記空間の気体を圧縮し、ピストン側面の小孔より
ピストンとシリンダー間の間隙へ加圧気体を噴出
せしめるスターリング機関。1 A space is provided in the piston, a check valve is installed at the entrance and exit of the space, the gas in the space is compressed by the reciprocating motion of the piston, and pressurized gas is ejected from a small hole on the side of the piston into the gap between the piston and the cylinder. The Starling Agency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58195622A JPS6088851A (en) | 1983-10-19 | 1983-10-19 | Stirling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58195622A JPS6088851A (en) | 1983-10-19 | 1983-10-19 | Stirling engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6088851A JPS6088851A (en) | 1985-05-18 |
| JPH0138178B2 true JPH0138178B2 (en) | 1989-08-11 |
Family
ID=16344227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58195622A Granted JPS6088851A (en) | 1983-10-19 | 1983-10-19 | Stirling engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088851A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2506776B2 (en) * | 1987-06-09 | 1996-06-12 | 松下電器産業株式会社 | Stirling engine |
| US5525845A (en) * | 1994-03-21 | 1996-06-11 | Sunpower, Inc. | Fluid bearing with compliant linkage for centering reciprocating bodies |
-
1983
- 1983-10-19 JP JP58195622A patent/JPS6088851A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6088851A (en) | 1985-05-18 |
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