SU1684540A1 - Heat engine - Google Patents

Abstract

The invention allows to simplify the design and manufacturing technology of heat engines with heat sensitive elements from a material that exhibits a shape memory effect. The heat engine contains an output shaft mounted in a housing on bearings, on which a frame of split washers is mounted, fixed in the axial direction. A thermosensitive element (TCE), made in the form of a tape or wire from a material exhibiting a shape memory effect, and having means for heating, is wound on the outer cylindrical surface of the frame. At its ends, the TCE is fixed to the housing, and the middle part is connected to the output shaft. The sequence of heating and cooling of the TCE, you can get a variable in the direction of the rotation of the output shaft. Making the carcass of split rings makes it possible to significantly simplify the design and technology of the engine. 3 hp f-ly, 4 ill.

Description

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The invention relates to heat engines with temperature sensitive elements of a material exhibiting a shape memory effect, and can be used as a drive for various devices and mechanisms.

The purpose of the invention is to simplify the design and improve the manufacturability.

FIG. 1 shows a heat engine; a general view; figure 2 - diagram of the engine with one temperature-sensitive element (TCE); FIG. 3 is a diagram of a motor with two TCEs and a location of the ends of TCEs on opposite sides of its attachment to the output shaft; FIG. 4 is a diagram of a motor with two TCEs and location of the ends of TCEs on one side of the place of its attachment to the output shaft.

The engine includes a housing 1, an output shaft 2 mounted therein on bearings 3. A flange 4 is rigidly mounted on shaft 2, and a frame 5 is freely placed, made of split washers 6 fixed axially relative to shaft 2. On the outer cylindrical surface of frame 5 formed the outer surface of the split washers 6, is wound with TCA 7, made of tape or wire from a material that exhibits a shape memory effect. TCHE is equipped with a means of heating (not shown), which can be performed electrocontact. In this case, the washers 6 can be made of electrical insulation

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material, for example, from fluoroplastic, and TCE 7 is applied to an elastic electrically insulating coating, for example, from a rubber or PVC pipe or polymeric varnishes.

TCHE 7 can be installed either with a countercurrent (torque spring, load, etc.), or with a second TCE 8 installed with the ability to work in antiphase.

The output shaft 2 is connected to the TCE 7 through the flange 4, to which the TCE 7 is rigidly fixed to the middle part, and both halves of the TCE are wound in one direction or on opposite sides of the attachment point 9 of the TCE 7 to the flange 4 (FIG. 3), or together on one side of the attachment point 9 (figure 4).

The heat engine works as follows.

If you preliminarily apply a torque to the shaft 2, which acts in the direction of the extension of the TCE 7, the shaft 2 rotates in the direction of the moment on the magnitude of the extension of the TCE 7. The subsequent heating of the TCE 7 causes the inelastic deformation to return and the shaft 2 to rotate in the opposite direction. The sequence of heating and cooling of the TCE 7 can be obtained by alternating in the direction of rotation of the shaft 2. When installing two TCE 7 and 8, they are heated alternately.

The implementation of the frame 5 of the split washers can significantly simplify the design and manufacturing technology by reducing the number of typical parts

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Claims (4)

1. A thermal engine comprising a housing, an output shaft disposed therein and at least one temperature sensing element made in the form of a tape or wire from a material exhibiting a shape memory effect, and fixed at least one end to the housing, with the output The shaft has a frame around which a temperature-sensitive element is wound, rigidly connected to the output shaft, characterized in that, in order to simplify the design and improve the manufacturability, the frame is made in the form of split washers made of electrical insulation This material is installed with the possibility of free rotation relative to the output shaft. 2. The motor according to claim 1, wherein the temperature-sensitive element is rigidly connected with the output shaft in its middle part, and with the body at both ends. 3. The motor according to claim 2, characterized in that both halves of the thermo-sensitive element are wound in the same direction on opposite sides from the place of its attachment to the output shaft. 4. The motor according to claim 2, about tl and h and y and d so that both halves of the heat-sensitive element is wound on one side of the place of its attachment to the output shaft. LU