JPS60175776A - Drive system utilizing temperature difference - Google Patents

Abstract

PURPOSE:To produce high rotary force from a drive system where a member expansible through temperature difference is employed to produce power through shifting of the centers of gravity of rotary shaft by arranging a plurality of unit members having plural pairs of bimetal boards fitted over a supporting rod radially on the rotary shaft. CONSTITUTION:Plural pairs of bimetal boards 1 having thermally warpable characteristic are fitted over a supporting rod 3 to constitute an unit member A such that the bimetal assembly is thermally expanded to the opposite side from a stopper metal 4 along the supporting rod 3. A plurality of said units A (12 in the drawing) are arranged radially with same interval on a rotary wheel 4 to produce a drive system 5 which is installed such that the shaft 9 is positioned near the interface 8 of atmosphere 6 and liquid 7 having temperature difference. Then each unit A is expanded/contracted in accordance with the ambient temperature to rotate around the shaft 9 in accordance with the difference of the center of gravity of each unit A thus to produce power through the rotary shaft 4.

Description

[Detailed Description of the Invention] The present inventor is currently applying for a type of external combustion engine that uses members that expand and contract due to temperature differences and obtains power by unevenly distributing the left and right centers of gravity of a rotating shaft. This invention applies this principle and is intended to be put into practical use by making further improvements.

That is, a bimetal plate made by pasting together metal plates with different coefficients of thermal expansion is cut into circles, squares, or rectangles as shown in Fig. Drill a hole in the hole, heat the bimetal plates i and i, turn them back, and then make the bimetal plate /,
The backs of each of the bimetal plates 1 and 1 are placed back to back with a slight gap NB between them and joined around the large plate, and as shown in FIG. Arrange multiple sets facing the front edge of l.
Furthermore, one bimetal plate 7' is placed at each end of the parallel arrangement.
are added with the front side edges facing each other in the same way as above, and the facing edges are connected, and the parallel bimetals i, t, t', and l' are added to the holes corresponding to the holes. A support rod 3 having a cross-sectional shape of 100 mm is inserted into each hole. The hole in the bimetal plate l' located at the tip 3' of the support rod 3 is made slightly larger to make it easier to replace the aged bimetal plate, and this is fixed to the tip y43' with a stopper. The whole is composed of a single dedication.

When this unit A is heated, the temperature of the bimetal plate 1 gradually rises, and the bimetal plate 1 gradually rises to the opposite side. However, when they cool down, the rod returns and moves toward the tip 3' of the support rod 3.

For example, as shown in Fig. 1, 7.2 units A each made up of io bimetal plates 1 are fixed radially at one end of the support rod 3 to the rotating wheel ψ at the same interval to form a drive device S. This is installed with horizontal bearings so that the bottom is located near the interface between the atmosphere 6 and the liquid 7, where there is a temperature difference. At this time, assuming that the atmosphere 6 is cold and the liquid 7 is hot (the reverse is also possible), if the drive device 5 is initially moved clockwise by an external force, the direction of rotation is determined by the initial movement in both cases, then
Single unit 41A11 is a combination of 10 bimetal plates Bl
, 13+1 is still completely shrunk, but the combination Bll of single element 9 is half immersed in the hot liquid 7, and all the bimetal plates are slightly repulsed, so the combination B8 is completely compressed along the support rod 3. Slightly elongates in the axial direction, and then becomes a single unit,
A6. The bimetal plate becomes larger in proportion to the length of time it is immersed in liquid A6 and liquid 7, and therefore the degree of elongation in the axial direction of the combination body gradually increases.

It reaches its maximum.

As the drive device S rotates, the hot liquid 7 and the cold atmosphere t flow into the single unit 9~AI! As time passes, the single body gradually shrinks as the bimetal plate combination body becomes shorter, and the combination body becomes curved and becomes the shortest again. Single A1. A! The combination B1. B! The shrinkage of the single body A means that the center of gravity of the single body A moves away from the axis 9, and the expansion of the combination body B, Ba, such as the single body ~, Aa, means that the center of gravity of the single body A moves closer to the axis D.Atmosphere 6 This device S, in which initial motion is applied as long as there is a sufficient temperature difference between the liquid 7 and the bimetallic plate to cause the bimetal plate to expand and contract, will generally be able to operate as shown in Fig. Because it follows the expansion and contraction process shown in the figure, its center of gravity is always located either to the left or right of the perpendicular P or y on the axis.Therefore, after the initial motion is given, this device It generates rotational force and does not stop.

If the bimetal plate has surplus strength, as shown in Fig. 3, the bimetal plate L closest to the axis D of the combination B is
If a weight io shown by a chain line with a hole similar to those is fixed to a bimetal plate l'', the weight difference between the left and right sides of the perpendiculars P and P' will be even larger, and a large rotational force can be obtained. .

The bimetal plate l is strongest when it is in the shape of a disk, but in spite of this, the reason why the bimetal plate l is made rectangular as shown in Fig. 1 is because when the combination body B expands, the opposing parts The two bimetal plates are shaped like one plate put together, and even if a slight gap is provided at the joint, it takes a lot of time for air and liquid to enter and exit the boundary surface t, so this is to avoid this. It is.

Also, if necessary, as shown for bimetal plate l in Figure 7, if you make a slight cut α in the vertical direction you want to bend (vertical direction in the figure), the edge of the bimetal plate l can be easily bent. The bending distance can be increased.

That is, without the cut lα, a large bending force would be applied in the horizontal direction in the figure, which would hinder bending in the vertical direction. However, when the cut lα is made, the bending force of the plate becomes weaker in inverse proportion to the whitening.

Also, the reason why the hole 2 drilled in the bimetal plate l is made square and the support rod 3 is not made circular is because the combination body B expands and contracts and the edges of the hole sway and the joints at the ends of the bimetal plate l. This is to prevent sideways shaking so that parts do not get destroyed. This is also because if the multi-bimetal plate, which is different from a circle, is rectangular, the distance from the axis to the end will change due to lateral vibration, and there is a risk of contact with the negative combination B.

Also, the reason why the set of bimetal plates i and i are provided with a gap 8 at the edge of the hole is that when the bimetal plates get cold, the two plates will come into close contact with each other, making it difficult for air and water to pass through that area. This is to prevent

The above has mainly been written regarding large drive devices for prime movers, but what is written below for small devices such as displays. For example, a set of 6 rectangular bimetal plates/ As shown in Fig. 5, this unit A is arranged like a water wheel around the rotating wheel/da to form a drive device/
Let it be j. However, as shown in FIG. 3, the bimetal plate //, ii eliminates the trouble of joining the edges of the hole and the end, and instead fills the entire gap S with a spacer 27 of the same type or square shape. Furthermore, a 9 m weight is provided between the shafts and the bimetal plate 11, and a spacer 2/2 is also placed between this weight 9 m and the bimetal plate 11 to create a gap S. In addition, between the heavy cylinder and the rotary infusion, in a cold atmosphere /6, the bimetal plate l/, the spacer 2/,
A coil spring n, which is weak enough to push up and support the weight px, etc., is arranged in each case.

The single units A having such a configuration are arranged at equal intervals around the shaft/de, and a hole J is drilled at the tip of the support rod 13, so that the escape of the bimetal/1 etc. In order to prevent distortion, protrusions W provided at both ends of the chevron-shaped holding plate 2J (see FIG. 7) are inserted alternately from the front to the back to hold the plate. (See Figure 6) There is a hole in the lower center and at the tip of the support rod/1- (the front of the clay is shown in the upper right corner of Figure 6).

The reason why this device rotates is the same as mentioned above, and it is clear at a glance in Fig. This is because as the shaft expands, it gradually contracts as it cools, and the N shaft also moves accordingly, and the heavy electric current supported by the shaft I continues to fall unbalanced to the left and right of the perpendicular to the shaft I.

This structure in which the coil springs 8-/~X-t push the bimetal etc. from the axis/2 direction reduces the pushing force of the bimetal plate combination from the opposite direction by an amount corresponding to the force of the coil spring, but as described above, There are 10 points such as saving the effort of joining.

The above description has been made of a bimetallic plate as a member that shrinks due to temperature differences, but it may also be a shape memory alloy that has a similar effect or a liquid that expands and contracts. In the case of shape memory alloys, they shrink when heated and expand when cooled, but heating causes faster and larger changes than cooling, so although rotational movement occurs, it does not generate much force. This type of drive device is a single unit L
Compared to a drive device that utilizes the shape and temperature difference centered around the bending part, the effective use of the force of the expansion and contraction member is slightly lower, and the initial motion must be provided from another source, but the structure is better. It is simple, the direction of rotation can be changed freely, and even members that take time to expand and contract can be effectively used by warping.

[Brief explanation of the drawing]

The drawings show an embodiment of the drive device using temperature difference according to the present invention, in which Fig. 1 is a front view of a rectangular bimetal plate, Fig. 2 is a side view of the bimetal plate in a horizontal position, and Fig. FIG. 3 is a side view of the bimetallic plate assembly when it is expanded. Fig. 5 is an overall front view of the drive device, Fig. 5 is an overall view of the drive device of another embodiment, and Fig. 6 is Fig. 5 XX.
7 is a perspective view of the holder.

Claims (1)

[Claims] One bimetal plate with a hole is placed back to back with a gap and connected around the hole to form a set.Several sets of bimetal plates are lined up, and the end kR of the bimetal plate on the front side of each set is arranged. are connected to the front edge of the bimetal plates of another set of adjacent and opposing pairs to form a combination body, and furthermore, a support rod adapted to the hole is inserted into the hole provided in the bimetal plate of this combination body. , the bimetal plate at the end of the combination is fixed to the tip of the support rod with a stopper to form a single body consisting of the support rod and the combination, and the proximal end of this single support rod is connected to the atmosphere and liquid. The bimetal plate assembly is installed in a radial arrangement at regular intervals on the rolling wheels of a horizontally suspended shaft that is supported near the interface of the air, and rotates on the shaft due to the uneven expansion and contraction of the bimetal plate assembly due to the temperature difference between the atmosphere and the liquid. A drive device that utilizes temperature differences to provide