JPH07224754A - Shape memory alloy heat engine and manufacture of shape memory alloy member used therefor - Google Patents
Shape memory alloy heat engine and manufacture of shape memory alloy member used thereforInfo
- Publication number
- JPH07224754A JPH07224754A JP3797494A JP3797494A JPH07224754A JP H07224754 A JPH07224754 A JP H07224754A JP 3797494 A JP3797494 A JP 3797494A JP 3797494 A JP3797494 A JP 3797494A JP H07224754 A JPH07224754 A JP H07224754A
- Authority
- JP
- Japan
- Prior art keywords
- shape memory
- memory alloy
- belt
- heat engine
- seamless
- 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.)
- Withdrawn
Links
Landscapes
- Pulleys (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、形状記憶合金を活用し
た動力源、いわゆる形状記憶合金熱エンジンに関し、特
にそれに使用される継目のない駆動用ベルトを用いた形
状記憶合金熱エンジン及びそれに使用される駆動用ベル
トの製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power source utilizing a shape memory alloy, a so-called shape memory alloy heat engine, and particularly to a shape memory alloy heat engine using a seamless drive belt used therein and the use thereof. The present invention relates to a method for manufacturing a drive belt.
【０００２】[0002]
【従来の技術】形状記憶合金の応用は、ブラジャー、ガ
イドワイヤ等の超弾性を利用したもの、及び換気口等の
感温アクチュエータや熱エンジン等の形状記憶効果を利
用したものに大別できる。形状記憶合金よりなる作動体
を用いた動力装置等、熱エネルギーから機械エネルギー
を取り出す熱エンジンの応用が期待され、各種動力装置
が開発されつつある。いずれのタイプの形状記憶合金熱
エンジンも、低温から高温への変化時におけるワイヤ、
あるいはコイル巻きバネであるベルト状部材の収縮によ
り、プーリを回転させるものである。しかし、ベルト状
部材としてワイヤを用いた場合、これまでは高出力を得
るため７％程度も収縮させているのが実状である。そし
て、これまではワイヤ端部どうしを溶接・接合してベル
ト状にしていたために、エンジン寿命、つまり駆動源
であるワイヤの接合部疲労破断が短い時間で生じていた
こと、接合部がプーリに触れる際、接合部の突起が多
少とも存在する場合はトルク損失が起こり、一時的にそ
の部分に引張応力が増大し、破断に至ること、接合部
がベルト断面積よりも小さい場合は収縮量が７％に至る
前にその部分が破断すること等、破断はいずれもワイヤ
接合部であった。上述のように、従来の形状記憶合金熱
エンジンはこれまでは継目のあるベルトしか無かったた
めに、駆動寿命が本来のＴｉＮｉ素材の持つ値には全く
至っていないのが実状であった。2. Description of the Related Art Applications of shape memory alloys can be broadly classified into those using superelasticity such as brassieres and guide wires, and those utilizing shape memory effect such as temperature-sensitive actuators such as ventilation openings and heat engines. There are expectations for application of heat engines that extract mechanical energy from thermal energy, such as power devices using actuating bodies made of shape memory alloys, and various power devices are being developed. Both types of shape memory alloy heat engines are equipped with wire,
Alternatively, the pulley is rotated by contraction of the belt-shaped member, which is a coil winding spring. However, when a wire is used as the belt-shaped member, the actual condition is that the wire has been shrunk by about 7% to obtain a high output. Up until now, wire ends were welded and joined together into a belt shape, which caused engine life, that is, fatigue breakage of the wire joint that was the drive source, in a short time. When touching, if there is any protrusion at the joint, torque loss occurs, tensile stress temporarily increases at that part, leading to breakage, and if the joint is smaller than the belt cross-sectional area, the amount of shrinkage All the fractures were at the wire-bonded portion, such as the fracture of the portion before reaching 7%. As described above, the conventional shape memory alloy heat engine has only the seamed belt so far, and thus the driving life has not reached the value of the original TiNi material at all.
【０００３】[0003]
【発明が解決しようとする課題】これまでは上述のよう
に継目のある駆動用ベルトしかないため、高寿命の形状
記憶合金熱エンジンが実用化されていない。As described above, since there is only a driving belt having a joint as described above, a long-life shape memory alloy heat engine has not been put into practical use.
【０００４】そこで、本発明の目的は、高出力が得ら
れ、かつ高寿命の形状記憶合金熱エンジン及びそれに使
用される駆動用ベルトの製造方法を提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide a shape memory alloy heat engine having a high output and a long life, and a method for manufacturing a drive belt used therein.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、一対の
径の異なるプーリに、無端状とされた形状記憶合金製駆
動材をベルト掛けし、前記プーリ間の前記駆動材の直線
部分の一方を、加熱装置で加熱し、他方を冷却装置で冷
却することにより、前記プーリを駆動する形状記憶合金
熱エンジンにおいて、前記駆動材としてベルト状の継目
のないＴｉＮｉ形状記憶合金製部材を使用してなる形状
記憶合金熱エンジンが得られる。本発明によれば、上述
のベルト状の継目のないＴｉＮｉ形状記憶合金製部材の
製造方法において、ＴｉＮｉ形状記憶合金中実ビレット
を放電加工により穴開けして筒状とし、ベルトの幅に切
断し、前記筒状体の内周側から延伸圧延することを特徴
とする形状記憶合金製部材の製造方法が得られる。According to the present invention, a pair of pulleys having different diameters are belted with a drive member made of an endless shape memory alloy, and a linear portion of the drive member between the pulleys is formed. In a shape memory alloy heat engine that drives the pulley by heating one with a heating device and cooling the other with a cooling device, a belt-like seamless TiNi shape memory alloy member is used as the driving material. A shape memory alloy heat engine is obtained. According to the present invention, in the above-mentioned method for manufacturing a belt-shaped seamless TiNi shape memory alloy member, a solid billet of TiNi shape memory alloy is perforated into a cylindrical shape by electric discharge machining and cut into a belt width. A method for manufacturing a shape memory alloy member is obtained, which comprises stretching and rolling from the inner peripheral side of the tubular body.
【０００６】[0006]
【作用】形状記憶合金熱エンジンを作製する場合、継目
のない形状記憶合金製駆動用ベルトを用いることが重要
である。溶接あるいは溶着して形状記憶合金製駆動用ベ
ルトを作製しても、繰り返し駆動すると、ベルトの溶接
あるいは溶着部分に応力が生じ、歪みが増大して駆動用
ベルトの寿命を著しく短縮する。本発明では、形状記憶
合金製筒体を作製し、この筒体を圧延して継目のない輪
を作製して、この輪を加工して駆動用ベルトを作製し
た。この駆動用ベルトは輪になっているので継目はな
く、高寿命の駆動用ベルトが得られる。本発明の形状記
憶合金熱エンジンは、一対の径の異なるプーリに前記の
継目のない駆動用ベルトを用いている。形状記憶合金製
駆動用ベルトの直線部分の一方を加熱装置で加熱し、他
方を冷却装置で冷却することによって、形状記憶合金熱
エンジンが完成する。When manufacturing a shape memory alloy heat engine, it is important to use a seamless shape memory alloy drive belt. Even if a drive belt made of a shape memory alloy is manufactured by welding or welding, when it is repeatedly driven, stress is generated in the welded or welded portion of the belt, distortion is increased, and the life of the drive belt is significantly shortened. In the present invention, a shape memory alloy tubular body is produced, the tubular body is rolled to produce a seamless ring, and the ring is processed to produce a drive belt. Since this drive belt is a loop, it has no seams and a drive belt with a long life can be obtained. The shape memory alloy heat engine of the present invention uses the seamless drive belt for a pair of pulleys having different diameters. The shape memory alloy heat engine is completed by heating one of the straight portions of the shape memory alloy drive belt with the heating device and cooling the other with the cooling device.
【０００７】[0007]
【実施例】以下に、本発明の実施例について説明する。
図１は、本発明の形状記憶合金熱エンジンの説明図であ
る。EXAMPLES Examples of the present invention will be described below.
FIG. 1 is an explanatory diagram of a shape memory alloy heat engine of the present invention.
【０００８】[0008]
【実施例１】高周波真空誘導溶解法によって得たＴｉ−
５０ａｔ％Ｎｉ合金に対して、熱間鍛造を施して中実ビ
レットに加工した後、放電加工で管外径φ３００ｍｍ、
管内径φ２９５ｍｍ、長さ１００ｍｍの筒体とした。次
に、その筒体を機械加工により１０ｍｍ幅に輪切り状態
とし、歪とり及び溶体化のための７５０℃、３０分不活
性ガス雰囲気での焼鈍を急熱水焼き入れにて行った。そ
の後、ロール径２００ｍｍの２ロール圧延機によって、
一方のロールをはずして輪切りにした管外径φ３００ｍ
ｍ、管内径φ２９５ｍｍ、長さ１０ｍｍの筒体の内周を
上記のはずしたロールに挿入してこのロールを元へセッ
トして、延伸圧延を行った。なお、圧延は減面率３０％
毎に中間焼鈍として、前記７５０℃３０分不活性ガス雰
囲気での焼鈍を急熱水焼き入れにて行った。上記圧延と
中間焼鈍を繰り返して、形状記憶合金製駆動用ベルトの
長さが１０００ｍｍで、ベルト幅３０ｍｍ、肉厚０．２
ｍｍの当該駆動用ベルト素材を作製した。このベルト素
材は、先ず幅切り機にて１０ｍｍ幅に切断後、４５０℃
で１時間焼鈍・水焼き入れ冷却して形状記憶処理した。
このようにして、長さ１０００ｍｍ、幅１０ｍｍ、肉厚
０．２ｍｍのベルト素材を得た。又、比較用駆動材とし
て、カセットローラダイスにて、板状に加工した同じ形
状を有するベルト素材をＴｉＧ溶接して作製したものを
用いた。本発明による上記駆動用ベルト１を、図１に示
すような軸間距離３１０ｍｍ離れてセットされた直径７
０ｍｍ及び５０ｍｍのプーリ２ａ及び２ｂにベルト掛け
し、駆動用ベルト１の一方を冷却装置６で１８℃に冷却
し、その他方を加熱装置５で９０℃に加熱することによ
り、形状記憶合金熱エンジンを駆動してその出力、及び
駆動寿命を測定した。その測定結果を下記の表１に示
す。Example 1 Ti-obtained by high frequency vacuum induction melting method
50 at% Ni alloy is hot forged to form a solid billet, and then the outer diameter of the pipe is φ300 mm by electric discharge machining.
A tubular body having a pipe inner diameter of 295 mm and a length of 100 mm was used. Next, the cylindrical body was cut into a 10 mm-width sliced state by machining, and was annealed in a inert gas atmosphere at 750 ° C. for 30 minutes for strain relief and solution treatment by rapid water quenching. After that, with a 2-roll rolling machine with a roll diameter of 200 mm,
Tube outer diameter φ300m with one roll removed
m, a tube inner diameter φ295 mm, and a length of 10 mm were inserted into the above-mentioned removed roll, the inner circumference of which was set, and stretch rolling was performed. In addition, the reduction rate of rolling is 30%
For each intermediate annealing, the annealing at 750 ° C. for 30 minutes in an inert gas atmosphere was performed by rapid water quenching. By repeating the above rolling and intermediate annealing, the shape-memory alloy driving belt has a length of 1000 mm, a belt width of 30 mm, and a wall thickness of 0.2.
The driving belt material of mm was manufactured. This belt material is first cut into 10mm width with a width cutter and then 450 ℃
Then, it was annealed for 1 hour, water-quenched and cooled for shape memory treatment.
In this way, a belt material having a length of 1000 mm, a width of 10 mm and a wall thickness of 0.2 mm was obtained. Further, as a comparative driving material, a material manufactured by TiG welding a belt material having the same shape processed into a plate shape with a cassette roller die was used. The driving belt 1 according to the present invention has a diameter 7 set with an axial distance of 310 mm as shown in FIG.
By belting around 0 mm and 50 mm pulleys 2a and 2b, cooling one of the driving belts 1 to 18 ° C. by the cooling device 6, and heating the other to 90 ° C. by the heating device 5, a shape memory alloy heat engine. Was driven to measure its output and driving life. The measurement results are shown in Table 1 below.
【０００９】[0009]
【表１】 [Table 1]
【００１０】表１は、本発明の実施例に関わる駆動用ベ
ルト１を使用した形状記憶合金熱エンジンの最大出力を
示したものである。この表から明かなように、本発明に
より得られた形状記憶合金熱エンジンにより、出力は同
等、寿命に関しては大幅な改善が認められた。従って、
本発明の駆動用ベルトを使用することによって、高寿命
の形状記憶合金熱エンジンを提供することができること
が判明した。なお、図１の補助プーリ３及びゴムベルト
２は、駆動用ベルト１、加熱装置５、冷却装置６等に異
常が発生した時に、補助的に他の動力源を使用し駆動す
るためのものである。Table 1 shows the maximum output of the shape memory alloy heat engine using the driving belt 1 according to the embodiment of the present invention. As is clear from this table, the shape memory alloy heat engine obtained according to the present invention was found to have the same output and a significant improvement in life. Therefore,
It has been found that a long life shape memory alloy heat engine can be provided by using the drive belt of the present invention. The auxiliary pulley 3 and the rubber belt 2 in FIG. 1 are for auxiliary driving by using another power source when an abnormality occurs in the driving belt 1, the heating device 5, the cooling device 6, and the like. .
【００１１】[0011]
【発明の効果】以上説明したように、本発明により、駆
動材としてベルト状の継目のないＴｉＮｉ形状記憶合金
駆動用ベルト、及びそれを用いた高寿命の形状記憶合金
熱エンジンを提供することができる。As described above, according to the present invention, it is possible to provide a belt-like seamless TiNi shape memory alloy driving belt as a driving material, and a long-life shape memory alloy heat engine using the belt. it can.
【図１】本発明の形状記憶合金熱エンジンの説明図。FIG. 1 is an explanatory diagram of a shape memory alloy heat engine of the present invention.
１ 駆動用ベルト ２ ゴムベルト ２ａ，２ｂ プーリ ３ 補助プーリ ５ 加熱装置 ６ 冷却装置 1 Driving Belt 2 Rubber Belts 2a, 2b Pulley 3 Auxiliary Pulley 5 Heating Device 6 Cooling Device
Claims (2)
れた形状記憶合金製駆動材をベルト掛けし、前記プーリ
間の前記駆動材の直線部分の一方を、加熱装置で加熱
し、他方を冷却装置で冷却することにより、前記プーリ
を駆動する形状記憶合金熱エンジンにおいて、前記駆動
材としてベルト状の継目のないＴｉＮｉ形状記憶合金製
部材を使用することを特徴とする形状記憶合金熱エンジ
ン。1. A pair of pulleys having different diameters is belted with an endless shape memory alloy driving material, and one of the linear parts of the driving material between the pulleys is heated by a heating device, and the other is heated. In a shape memory alloy heat engine for driving the pulley by cooling a cooling device, a belt-shaped seamless TiNi shape memory alloy member is used as the driving material. .
ｉＮｉ形状記憶合金製部材の製造方法において、ＴｉＮ
ｉ形状記憶合金中実ビレットを放電加工により穴開け加
工して筒状とし、前記筒状体の内周側から延伸圧延する
ことを特徴とする形状記憶合金製部材の製造方法。2. The belt-like seamless T according to claim 1.
In a method of manufacturing an iNi shape memory alloy member, TiN
i A method for manufacturing a shape memory alloy member, characterized in that a solid billet of a shape memory alloy is perforated by electric discharge machining into a tubular shape, and stretch-rolled from the inner peripheral side of the tubular body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3797494A JPH07224754A (en) | 1994-02-10 | 1994-02-10 | Shape memory alloy heat engine and manufacture of shape memory alloy member used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3797494A JPH07224754A (en) | 1994-02-10 | 1994-02-10 | Shape memory alloy heat engine and manufacture of shape memory alloy member used therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07224754A true JPH07224754A (en) | 1995-08-22 |
Family
ID=12512547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3797494A Withdrawn JPH07224754A (en) | 1994-02-10 | 1994-02-10 | Shape memory alloy heat engine and manufacture of shape memory alloy member used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07224754A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3199807A1 (en) * | 2016-01-28 | 2017-08-02 | The Boeing Company | Solid-state motor and associated systems and methods |
-
1994
- 1994-02-10 JP JP3797494A patent/JPH07224754A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3199807A1 (en) * | 2016-01-28 | 2017-08-02 | The Boeing Company | Solid-state motor and associated systems and methods |
| US9995288B2 (en) | 2016-01-28 | 2018-06-12 | The Boeing Company | Solid-state motor and associated systems and methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A761 | Written withdrawal of application |
Free format text: JAPANESE INTERMEDIATE CODE: A761 Effective date: 20041108 |