JP2718920B2 - Free piston type Stirling engine - Google Patents

Free piston type Stirling engine

Info

Publication number
JP2718920B2
JP2718920B2 JP61159031A JP15903186A JP2718920B2 JP 2718920 B2 JP2718920 B2 JP 2718920B2 JP 61159031 A JP61159031 A JP 61159031A JP 15903186 A JP15903186 A JP 15903186A JP 2718920 B2 JP2718920 B2 JP 2718920B2
Authority
JP
Japan
Prior art keywords
displacer
space
stirling engine
piston type
temperature space
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
Application number
JP61159031A
Other languages
Japanese (ja)
Other versions
JPS6316159A (en
Inventor
照丸 原田
憲一 猪田
龍夫 藤田
欣一 足立
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP61159031A priority Critical patent/JP2718920B2/en
Publication of JPS6316159A publication Critical patent/JPS6316159A/en
Application granted granted Critical
Publication of JP2718920B2 publication Critical patent/JP2718920B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02G2243/30—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders
    • F02G2243/38—External regenerators having parallel cylinders, e.g. "Heinrici" engines
    • 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
    • F02G2270/85—Crankshafts
    • 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
    • F02G2280/00—Output delivery
    • F02G2280/50—Compressors or pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ディスプレーサ駆動方式のフリーピストン
式スターリング機関のディスプレーサ駆動部の改良に関
する。 従来の技術 一般に、外燃機関であるスターリング機関は、高効率
性，多燃料性，静粛性等の多くの特徴を備えており、ス
ターリング機関を構成上で大別すると、ディスプレーサ
と動力ピストンが共にクランク機構等で拘束されていな
いフリーピストン式スターリング機関とクランク機構等
にディスプレーサと動力ピストンを連結したスターリン
グ機関（以下、機械式スターリング機関と称す）とがあ
る。 発明が解決しようとする問題点 機械式スタ−リング機関では、コンロッドやクランク
軸で出力を取出す為、摺動部に大きな力がかかり機械損
失が多く、またクランク軸等の機構部も大きくなる。一
方、フリーピストン式スターリング機関は、一般に動力
ピストンがクランク軸やコンロッドで拘束されていない
為、機械損失が少ないという利点がある。しかし、ディ
スプレーサもピストンもフリーの場合、負荷変動に対す
る制御が複雑になる。 問題点を解決するための手段 本発明は、クランク機構あるいはこれに相当する機構
によりディスプレーサを駆動し、ディスプレーサと同軸
上にディスプレーサの直径より小さい直径で、相互に摺
動可能な前記ディスプレーサとハウジングの一部とで囲
まれ、ディスプレーサの動きに応じて内容積が変化する
ガス空間を備えた構成としたことを特徴とするフリーピ
ストン式スターリング機関である。 作用 本発明は、ディスプレーサはクランク機構等で拘束さ
れている為、負荷変動による制御も周波数を変える等容
易で、ディスプレーサと同軸上に前記構成のガス空間を
設けることにより、加熱，冷却することで生じる作動ガ
スの圧力変動を利用でき、ディスプレーサを駆動する動
力を少なく、駆動装置も小型化できる。 実施例 以下、本発明の一実施例を図面にもとづいて説明す
る。第１図において、ハウジング１に固定された固定子
巻線２に電力を供給するとロータ３が回転し、ロータ３
が固定されているクランク軸４も回転する。クランク軸
４が回転するとコネクティングロッド５を介してディス
プレーサロッド６及びディスプレーサ７は上下に往復動
する。ディスプレーサ７が上下に往復動すると、スター
リング機関内部の封入されているヘリウム等の作動ガス
が、加熱器8,再生器9,冷却器10を通って高温空間11及び
低温空間12の間を往復する。例えば、ディスプレーサ７
が上方に移動すると、高温空間11内にある作動ガスは加
熱器８を通り、再生器９でガス自身の持っている熱を蓄
熱し、冷却器10で冷却されて低温空間12側に移動する。
この時、動力ピストン13の上方側の空間にある作動ガス
は低温空間側にある割合が多くなり作動ガスの圧力は下
がり、動力ピストン13を引き上げる。逆に、ディスプレ
ーサ７が下方に移動すると、低温空間12内にある作動ガ
スは冷却器10を通り、再生器９に蓄熱された熱を吸収し
て加熱器８で加熱され高温空間11側に移動する。この
時、動力ピストン13の上方側の空間の作動ガスは高温空
間11側にある割合が多くなり、作動ガス圧力は上昇し、
動力ピストン13を下方に押し下げる。これを繰り返すこ
とにより動力ピストン13は負荷14に打ち勝って上下に往
復動する。又、ディスプレーサ７と動力ピストン13が、
ある位相差で動くことによって生じる作動ガスの圧力変
動が、ディスプレーサ７の上下面にも働くが、作動ガス
の移動に伴う圧力損失を無視すれば、ディスプレーサ７
上下面に働く圧力は同じであるため、何らディスプレー
サ７を駆動する力とはならない。しかしながら、本発明
のように、ガス空間15をディスプレーサ７の低温空間側
に設けることにより、ガス空間15の直径に相当する断面
積に、ディスプレーサ７上方の高温空間側圧力とガス空
間15内の圧力の差が働き、これがディスプレーサ７を駆
動する力となる。よって、ディスプレーサ７を駆動する
為の固定子巻線には少ない動力で済む。なお、本実施例
では、ガス空間15としてガスバネ空間として働くような
小空間の例を図示しているが、ディスプレーサ７が動作
中でも大略平均圧となるような大きい空間でもよいこと
は無論である。また、ガス空間15の容積を適当に選べ
ば、コネクティングロッド等にかかる力を低減でき、摺
動抵抗を減らすこともできる。本実施例では述べていな
いが、ガス空間15の容積を可変にすることも、負荷変動
に対応するのに有効であることは無論である。 発明の効果 本発明は、フリーピストン型スターリング機関におい
て、クランク機構やこれに相当する機構によりディスプ
レーサを駆動し、ディスプレーサと同軸上にガス空間を
備えることにより、制御も容易で、ディスプレーサを駆
動する為の外部動力も少なくでき、その為に小型で制御
性の良いスターリング機関を得ることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a displacer driving section of a displacer driven free piston type Stirling engine. 2. Description of the Related Art In general, a Stirling engine, which is an external combustion engine, has many features such as high efficiency, multi-fuelity, quietness, and the like. There are a free piston type Stirling engine not restricted by a crank mechanism or the like and a Stirling engine (hereinafter referred to as a mechanical Stirling engine) in which a displacer and a power piston are connected to a crank mechanism or the like. Problems to be Solved by the Invention In a mechanical stirling engine, since a connecting rod or a crankshaft outputs power, a large force is applied to a sliding portion, mechanical loss is large, and a mechanical portion such as a crankshaft is also large. On the other hand, a free piston type Stirling engine has an advantage that a mechanical loss is small because a power piston is not generally restrained by a crankshaft or a connecting rod. However, when both the displacer and the piston are free, control for load fluctuation becomes complicated. Means for Solving the Problems The present invention drives a displacer by a crank mechanism or a mechanism equivalent thereto, and the displacer and the housing which are mutually slidable with a diameter smaller than the diameter of the displacer coaxially with the displacer. A free piston type Stirling engine characterized by having a gas space surrounded by a part and having a gas space whose internal volume changes according to the movement of a displacer. In the present invention, since the displacer is constrained by a crank mechanism or the like, control by load fluctuation is easy, such as changing the frequency. By providing the gas space having the above configuration coaxially with the displacer, heating and cooling are achieved. The generated pressure fluctuation of the working gas can be used, the power for driving the displacer is small, and the driving device can be downsized. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, when power is supplied to a stator winding 2 fixed to a housing 1, a rotor 3 rotates,
The fixed crankshaft 4 also rotates. When the crankshaft 4 rotates, the displacer rod 6 and the displacer 7 reciprocate up and down via the connecting rod 5. When the displacer 7 reciprocates up and down, the working gas such as helium enclosed in the Stirling engine reciprocates between the high-temperature space 11 and the low-temperature space 12 through the heater 8, the regenerator 9, and the cooler 10. . For example, displacer 7
Moves upward, the working gas in the high-temperature space 11 passes through the heater 8, stores the heat of the gas itself in the regenerator 9, is cooled by the cooler 10, and moves to the low-temperature space 12 side. .
At this time, the ratio of the working gas in the space above the power piston 13 to the low temperature space side increases, the pressure of the working gas decreases, and the power piston 13 is raised. Conversely, when the displacer 7 moves downward, the working gas in the low-temperature space 12 passes through the cooler 10, absorbs the heat stored in the regenerator 9, is heated by the heater 8, and moves to the high-temperature space 11 side. I do. At this time, the ratio of the working gas in the space above the power piston 13 to the high-temperature space 11 increases, and the working gas pressure increases.
The power piston 13 is pushed down. By repeating this, the power piston 13 reciprocates up and down overcoming the load 14. Also, the displacer 7 and the power piston 13
The pressure fluctuation of the working gas caused by moving with a certain phase difference also acts on the upper and lower surfaces of the displacer 7, but if the pressure loss accompanying the movement of the working gas is ignored, the displacer 7
Since the pressures acting on the upper and lower surfaces are the same, they do not act as a driving force for the displacer 7 at all. However, by providing the gas space 15 on the low-temperature space side of the displacer 7 as in the present invention, the pressure in the high-temperature space above the displacer 7 and the pressure in the gas space 15 are reduced to a cross-sectional area corresponding to the diameter of the gas space 15. , Which is the driving force of the displacer 7. Therefore, less power is required for the stator winding for driving the displacer 7. In the present embodiment, an example of a small space acting as a gas spring space is shown as the gas space 15, but it is a matter of course that a large space where the average pressure is substantially maintained even when the displacer 7 is in operation. If the volume of the gas space 15 is appropriately selected, the force applied to the connecting rod and the like can be reduced, and the sliding resistance can be reduced. Although not described in the present embodiment, it is needless to say that making the volume of the gas space 15 variable is also effective for coping with load fluctuation. Advantageous Effects of the Invention The present invention provides a free piston type Stirling engine in which a displacer is driven by a crank mechanism or a mechanism equivalent thereto, and a gas space is provided coaxially with the displacer, so that control is easy and the displacer is driven. The external power of the engine can be reduced, so that a small and highly controllable Stirling engine can be obtained.

【図面の簡単な説明】 第１図は本発明の一実施例のフリーピストン式スターリ
ング機関の概略縦断面図である。 ２……固定子巻線、３……ロータ、４……クランク軸、
５……コネクティングロッド、７……ディスプレーサ、
13……動力ピストン、BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic longitudinal sectional view of a free piston type Stirling engine according to one embodiment of the present invention. 2 ... stator winding, 3 ... rotor, 4 ... crankshaft,
5 ... connecting rod, 7 ... displacer,
13 ... Power piston,

───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤田 龍夫 門真市大字門真1006番地 松下電器産業 株式会社内 (72)発明者 足立 欣一 門真市大字門真1006番地 松下電器産業 株式会社内 (56)参考文献 特開 昭59−168249（ＪＰ，Ａ) 特開 昭60−43157（ＪＰ，Ａ) 特開 昭60−243351（ＪＰ，Ａ)   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Tatsuo Fujita               1006 Kadoma Kadoma Matsushita Electric Industrial               Inside the corporation (72) Inventor Kinichi Adachi               1006 Kadoma Kadoma Matsushita Electric Industrial               Inside the corporation                (56) References JP-A-59-168249 (JP, A)                 JP-A-60-43157 (JP, A)                 JP-A-60-243351 (JP, A)

Claims (1)

(57)【特許請求の範囲】 １．シリンダ内の空間を、クランク機構あるいはこれに
相当する機構により駆動されるディスプレーサによって
高温空間と低温空間とに分割し、前記高温空間と前記低
温空間との間に、加熱器、再生器および冷却器を配した
側路を形成し、前記低温空間において、前記ディスプレ
ーサと同軸上に、ディスプレーサの一部と、ハウジング
の一部を摺動可能に構成し、前記ディスプレーサの動き
に応じて内容積が変化し、前記ディスプレーサの外径よ
り小さい径のガス空間を備えたフリーピストン式スター
リング機関。(57) [Claims] The space in the cylinder is divided into a high-temperature space and a low-temperature space by a displacer driven by a crank mechanism or a mechanism equivalent thereto, and a heater, a regenerator and a cooler are provided between the high-temperature space and the low-temperature space. A part of the displacer and a part of the housing are slidably arranged coaxially with the displacer in the low-temperature space, and the inner volume changes according to the movement of the displacer. And a free piston type Stirling engine having a gas space smaller in diameter than the outer diameter of the displacer.
JP61159031A 1986-07-07 1986-07-07 Free piston type Stirling engine Expired - Lifetime JP2718920B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61159031A JP2718920B2 (en) 1986-07-07 1986-07-07 Free piston type Stirling engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61159031A JP2718920B2 (en) 1986-07-07 1986-07-07 Free piston type Stirling engine

Publications (2)

Publication Number Publication Date
JPS6316159A JPS6316159A (en) 1988-01-23
JP2718920B2 true JP2718920B2 (en) 1998-02-25

Family

ID=15684744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61159031A Expired - Lifetime JP2718920B2 (en) 1986-07-07 1986-07-07 Free piston type Stirling engine

Country Status (1)

Country Link
JP (1) JP2718920B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08520Y2 (en) * 1989-03-30 1996-01-10 アイシン精機株式会社 Free piston Stirling engine
GB9008522D0 (en) * 1990-04-17 1990-06-13 Energy For Suitable Dev Limite Reciprocatory displacement machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0633729B2 (en) * 1983-03-14 1994-05-02 三洋電機株式会社 Stirling engine
JPS6043157A (en) * 1983-08-20 1985-03-07 Matsushita Electric Ind Co Ltd Stirling engine
JPS60243351A (en) * 1984-05-17 1985-12-03 Matsushita Electric Ind Co Ltd Stirling engine

Also Published As

Publication number Publication date
JPS6316159A (en) 1988-01-23

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