JPS593835A - Temperature responsive element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a temperature sensitive element whose shape changes depending on wetness.

Conventionally, in temperature-sensitive elements, bimetals, fuses, and the like have been generally used, which utilize the heat 1 kl'J of the metal and its fusing when the temperature changes. However, although bimetals can be continuously sensitized within a certain temperature range, it is not possible to react sharply at a specific temperature.

This is because it utilizes thermal expansion, which only changes continuously and gradually with respect to temperature. Therefore, it was also impossible to increase the amount of displacement corresponding to humidity changes.

On the other hand, in recent years, island elements or thermal actuators made of shape memory alloys have been proposed.

A shape memory alloy changes its shape by changing its crystal structure based on transformation from full tensile strength to 1. However, the transformation temperature and reverse transformation temperature of martensitic transformation are material-specific, so by changing the composition of the material or by using it in combination with a spring etc.
Although it is possible to control the degree and displacement, the control range is quite small and is extremely insufficient.

Furthermore, the conventional temperature-sensitive materials mentioned above, i.e., bimetals, fuses, or shape memory alloys, are only sensitive in one temperature range or a specific temperature range, and are only sensitive in stages at multiple temperatures. It was not possible to feel the temperature.

Therefore, it is an object of the present invention to provide a temperature sensitive element that can sense temperature at a plurality of temperature values and that can have a large change in shape based on temperature changes.

In summary, this invention has a shape memory effect based on thermoelastic martensitic transformation, and is made by connecting a plurality of alloy members having different transformation temperatures and degrees of reverse transformation.
It is a temperature sensitive element.

"Thermoelastic martenlitic transformation" refers to martensitic transformation in which the difference between the transformation temperature and 1 m degree of reverse transformation is relatively small. In this invention, the upper temperature and reverse transformation temperature are mutually equal! By connecting multiple alloy members that undergo thermoelastic martensitic transformation, C13 becomes responsive to multiple temperature ranges or temperature values! The present invention provides a temperature sensitive element that

[Thermoelastic martensitic transformation] used in this invention
Specifically, the "alloy member" that produces
NI T1 alloy consisting of 0 to 60% by weight of N1 and 40 to 50% by weight of T1, or a part of N1 or TI of this NI T1 alloy is [e, Co, CU, AI, V,
NI T1 alloy, or copper alloy such as Cl-7n alloy, C1-△1 alloy, or CU-3n alloy, or 8-copper alloy, which has been replaced with one or more elements selected from the group consisting of elements such as lr. A part of 7-n, Δ1,3n.

Sl, Mn,! vlo,Qa,Go,l”1.Zr,B
.

Or it can be composed of rare earth elements, etc. from Y)n
Beta brass type 4M substituted with one or more selected elements
Copper alloys with a certain thickness are used.

"Connection" of the plurality of alloy members can be performed by various known connection methods. For example, the alloy members may be directly joined to each other, or known connecting means may be installed between the alloy members. Moreover, it is sufficient that "several pieces" of each alloy member are connected, and any number of alloy members may be connected as long as it is two or more. Furthermore, each alloy member does not necessarily need to be connected in “series”;
“They may be connected in parallel J.

Preferably, the difference in transformation temperature and inverse transformation a temperature between each alloy member may be selected to be 20° C. or less at the closest value. This allows the shape change of each alloy member to be achieved at close humidity levels, so that it changes temperature over a wide range of temperatures in conjunction with each other, rather than in multiple stages. can be written.

Furthermore, by connecting each alloy 61) material to a power source, heating it through it, and restricting this current, the parking position J, that is, the elevation position, is changed to li fl, depending on the humidity change. 1lII
IllII is also possible.

As described above, according to the present invention, it is possible to eliminate the shape memory effect caused by the mature elastic martenreith transformation, and to connect a plurality of alloy members having different deformities, temperatures, and inverse thermal decays. The conductivity sensing element of the present invention is capable of sensing a wide temperature range and in multiple stages, and can control displacement based on temperature changes. Even if the first stage of the IJ detects that it has gone into a troubled state,
It is used in a wide range of industrial fields, such as multi-stage temperature detectors that detect over-boiling of the second stage 'C, and robots 4 such as manipulators that require multi-stage operation.

In the following, IJ will be explained in Examples.

On the other hand, alloy members were prepared which were made of 11% Cu, Zr+JJ, and A1 and had inverse change amffl of 40°C, 60°C, and 100°C. Each alloy member has a diameter of 2111111 and a length of 1
In Fig. 1, the alloy member 1 has a distance B temperature of 40°C and an inversely variable Fil temperature of 60°C. It will be appreciated that the alloy member 2 having a temperature of 100° C. and the alloy member 3 having a reverse transformation temperature of 100° C. are connected sequentially from left to right and extend in a straight line. The temperature sensitive element 4 of Example 1 thus formed was quenched in water at 750° C. while being fixed in a linear shape. Next, it was bent into a ring shape as shown in FIG. 2 in ice water at 0°C. Next, when heated to 50°C, 70°C and 100°C, each alloy member 1, 2.3 becomes sensitive to each temperature, as shown in Figs. 3, 4 and 5, respectively. Then, it gradually returned to its straight shape. That is, at 40°C, the alloy member 1 becomes a straight line, at 60°C the alloy member 2 becomes a straight line, and at 100°C the alloy member 3 becomes a straight line, so at 100°C the alloy member becomes straight. Therefore, the entire temperature sensitive water element 4 becomes a straight line.

) Xtori' [and Nl, from TI, reverse variable fil wetness claw 60℃, 70℃
An alloy wire having a diameter of 1 mm and having a composition of 80° C. was prepared. Each of the alloys 111, 12, and 13 was connected with a hat welder, and the whole was tightly coiled as shown in FIG. The coil 14 consisting of each of the alloy wires 11, 12, and 13 thus formed was heated for 1711 hours (10+ at 500° C. while keeping the wires 11, 12, and 13 connected in the open) for a period of 1711 hours. As shown in the figure, IJ' was made.J3, 6th
As is clear from Figure J: and Figure 7, the alloy wires 11, 12.
13, alloy wires 11, 12, and 13 are joined in order from the left side to form a valve. Next, the coil 14 thus formed was sequentially heated to 60°C, 70'CJ3J, and 80°C, and as shown in Fig. 8, Fig. 9 J3, and Fig. 10, respectively, it contracted sequentially. did. However, when the temperature reaches 60°C, the alloy wire 11 contracts, and at 70°C, the alloy wire I! At 80°C, the coil made of alloy wire 13 contracts, and therefore, at 80°C, the entire coil 14 contracts and has the same shape as the densely coiled coil '14 shown in Figure 6. Ta.

Prepare the same coil as the coil 14 used in Example 2,
As shown in FIG. 11, it was attached between the fixed member 25 and the movable member 26. As is clear from FIG. 11, from the fixed member 25 to the movable part 02G, the reverse transformation moisture level is 60°C,
Coils made of alloy wires 11, 12, and 13 at 70°C and 80°C are connected. On the opposite side of the movable member 26,
A coil spring 28 made of ordinary steel is disposed between the fixing member 27 and the fixing member 27. Therefore, the position of the movable member 26 is determined by the force balance between the coil 14 and the coil spring 25. A power source 29 and control JII equipment 30 were connected in series between one fixed member 25 and the movable member 26. That is, the power source 29 and ! are connected to the coil 14 via the fixed member 25 and the movable member 26. bll tll outfit
A pulsed current controlled by Ij130 was applied. In this way, we will pass a pulse current to the coil 14.
When each alloy wire 11, 12.13 was heated, the reverse transformation temperature of each alloy wire 11, 12.13 was 60°C, 70°C113
and 80° C., the coil 14 sequentially contracts, and the position Δ of the movable member 26 sequentially moves to the left as shown in FIGS. 12, 13, and 14. By the way, by controlling the current flowing through the coil 14 with the control 11HIffi 30, the heat generation in the coil 14 can be controlled with high precision. In the Tang Dynasty, there was a turning point that Jll was established.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an alloy member used in a temperature sensitive element according to a first embodiment of the present invention. Figure 2 shows 1. FIG. 3 is a plan view showing the alloy member shown in FIG. 1 in an I-beam state processed at a temperature below the transformation temperature. FIGS. 6 is a plan view showing a state of shape recovery according to the present invention.
FIG. 3 is a plan view showing an alloy member used in Example 2; FIG. 7 is a plan view showing the state in which the alloy member shown in FIG. 6 has been subjected to tension processing at a temperature below the transformation temperature. 8 to 10 are plan views showing the state of shape recovery in the second embodiment of the present invention. FIG. 11 shows the third embodiment of this invention.
FIG. 2 is a schematic side view showing an embodiment of the invention. 12 to 14 are schematic side views showing the state of shape recovery in the third embodiment of the present invention. In the figure, 1, 2. 3. 11. 12, 1] Jl! 1 indicates an alloy member that undergoes elastic martensitic transformation, and 4.14 indicates a temperature sensitive element formed by connecting each alloy member. Patent applicant: Sumitomo Electric Industries, Ltd.

Claims (5)

[Claims] (1) Thermoelastic Martensia] - A temperature sensitive element which has a shape memory effect based on transformation and is formed by connecting a plurality of alloy members having a B modulation degree and a reverse transformation temperature of V4. (2) Variation Pt between each of the alloy members! ! Claim wSI in which the difference between the temperature and the reverse transformation temperature is 20°C or less
Temperature-sensitive element as described in Section. (3) The alloy member contains 50 to 60% by weight of N1 and 4.
0 to 50% by weight of NIT1 alloy, or 5% of N1 or T1 of the NI T1 alloy is Fe.
, Co, C0, AI, ■, 7-r, etc. its'I
Claim 1 consisting of a Ni'l1 alloy substituted with one or more elements selected from the group
The temperature sensitive element according to item 1 or 2. (4) The alloy member is Cu-7n alloy, CU-AI
copper alloys or 1tcu-3n alloys;
, MO, C8, Ge, TI, Zr, [3, rare earth elements (6) composed of a copper alloy having a beta brass type structure, substituted with one or more redundant elements selected from 8Y composed of (6). The temperature sensitive element according to claim 1 or claim 2, wherein (5) Between the alloy members! i! The temperature-sensitive cumulative T0 according to any one of items 1 to 4, which is achieved by bonding and joining each alloy member.