The thermal expansion of tungsten wire may cause a series of problems during use, which are mainly caused by the size change of tungsten wire when the temperature changes. The following is a detailed analysis of these issues:
- Impact on equipment performance and life
Dimensional stability issues:
Tungsten wire will expand and contract when the temperature changes, which may cause the size of the parts connected or adjacent to it to be mismatched, thus affecting the overall performance of the equipment.
In precision machinery and electronic equipment, even small size changes may cause the equipment to malfunction or performance degradation.
Stress changes and damage:
The rate of expansion and relaxation of tungsten wire is affected by stress changes. When the temperature changes, thermal stress will be generated inside the tungsten wire. If the stress exceeds the tolerance limit of the tungsten wire, it will cause damage to the tungsten wire.
Especially in electrical equipment, tungsten wire usually works in a high temperature environment, and long-term thermal expansion and contraction may cause cracks or fractures inside the tungsten wire.
- Leading to electrical failure and safety risks
Electrical equipment failure:
As mentioned above, the size change and stress change of tungsten wire may cause damage or failure of other parts in the electrical equipment, resulting in equipment failure.
In extreme cases, the breakage of tungsten wire may cause serious failures such as short circuit or fire of electrical equipment.
Increased safety risks:
The failure of electrical equipment may cause safety risks such as fire and electric shock. Especially in electrical appliances used in homes or public places, the thermal expansion of tungsten wires may cause serious safety accidents.
- Impact on the performance of lighting equipment
Degradation of bulb performance:
In bulbs, tungsten wires are key light-emitting components, and their dimensional stability directly affects the performance and life of bulbs. The thermal expansion of tungsten wires may cause excessive stress inside the bulb, thereby affecting the sealing and light output of the bulb.
In addition, the thermal expansion of tungsten wires may also accelerate the sublimation and evaporation of tungsten wires, resulting in a shortened bulb life.
Filament breakage:
Tungsten wires may break due to stress concentration during thermal expansion and contraction. Especially at the moment when the bulb is just turned on, the local temperature of the tungsten wire rises too quickly due to the sudden increase in current, which aggravates the thermal expansion and contraction effect and stress concentration phenomenon, thereby increasing the risk of filament breakage.
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