Series-innovation principle-37-Principle of Thermal Expansion

The principle of thermal expansion is described as follows:

1) change the temperature of the material and use its expansion or contraction effect;
2) use various materials with different thermal expansion coefficients;

Thermal expansion and contraction are physical phenomena that we are very familiar with. The thermal expansion can be positive or negative, and its motion range is not limited to the thermal field, changes in gravity, pressure, altitude, or light may cause thermal expansion (shrinkage ):
A) when assembling a metal double ring, the inner ring can be cold and the outer ring will swell. When the return temperature is normal, the inner and outer rings will be firmly fixed;
B) Dual-metal switch; Use the deformation of materials with different expansion coefficients to form a breaking;
C) Alcohol thermometer; thermal expansion temperature measuring instrument;
D) steam locomotive;
In the process of thermal expansion, the material volume changes (the length changes in a certain direction), and a large amount of thrust and pressure (expansion and contraction) can be produced ), we can use this effect to implement the capabilities we need. Of course, such effects sometimes bring negative effects. We should take this negative effect into account while using this principle, and prevent it in advance.

Hot expansion, cold contraction, is a relatively popular method, but the water at 4 degrees Celsius to 0 degrees is an exception, this special nature of the use of more, such as the above description of the Silent ice blasting.

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Series-innovation principle-37-Principle of Thermal Expansion