Description
Among the commercially available Shape Memory Alloys, nitinol (nickel-titanium, Ni-Ti, and Ni-Ti based) is outstanding due to its excellent performance and reliability, in addition to strain recovery, Ni-Ti is attractive for several medical applications due to its biocompatibility, corrosion resistance, and fatigue behavior.Nitinol spring by flat nitinol wire, wire size, strength and size per drawings.
Current status of the use of Nitinol spring
Bathtubs, water heaters, faucets, and showers are an important part of the smart home field. Many families now use cold water pipes to heat water pipes, and the hot and cold water are blended to achieve a suitable temperature for the human body, so as to facilitate people to wash. In this way, it is inevitable to test the water temperature several times, and there is a possibility of being scalded.Install the Nitinol spring to the water heater, bathtub, faucet, and shower head, When the temperature reaches a suitable temperature for the human body, the temperature control spring will block the power supply, so that the water in the water tank is constant at the suitable temperature for the human body.
The shape memory alloy spring can be used to control the water temperature of the bathroom water pipe: when the hot water temperature is too high, the “memory” function can be used to adjust or close the water supply pipe to avoid burns.
The working principle
The effective operating temperature range of shape memory alloy springs made of Nitinol (Ni-Ti) alloys is 0°C ~ 120°C. , with the help of the fast thermal expansion and contraction of the memory alloy spring, the mixing ratio of hot and cold water can be quickly adjusted to achieve a constant temperature of plus or minus 1 degree Celsius.
The Nitinol spring has an extremely fast response speed, and the instantaneous temperature exceeding value can be controlled below 2°C, and the response is extremely sensitive near 40°C, which can meet the needs of users for step less fine-tuning.
In the SMA thermostatic valve/thermostatic valve core, the nitinol spring itself is used as a temperature sensing element, and the expansion and contraction of the shape memory alloy determines the temperature of the mixed liquid through the feed of the hot and cold liquid, and then feed backs through the characteristics of the memory alloy. Adjustment, so repeatedly to achieve a dynamic balance, which saves valuable space and makes the thermostatic valve more delicate.
The components where ocated Generally installed in thermostatic valves, thermostatic valves, thermostats and safety valves of sanitary equipment.
Composition
The Composition of Nitinol Spring select nitinol wire that meets ASTM2063, and generally dia0.1-dia3,2 mm to with AF temperate 40-120 ℃ Depending on specific application, the production method and process will be different. However, the heat treatment after the finished product is quite critical, which directly determines the effect and service life.
The mechanical properties and advantages
Nitinol is a shape memory alloy (Shape Memory Alloys referred to as SMA), which is a special alloy that can automatically restore its own plastic deformation to its original shape at a certain temperature. Its expansion rate is above 20%, its fatigue life is up to 1*10 to the 7th power, and its damping characteristics are 10 times higher than that of ordinary springs.
In addition to its unique shape memory function, memory alloys have unique shape memory functions.
The following advantages to used in sanitary equipment:
- Precise thermostatic regulation
- Long service life
- Save water and electricity
- Corrosion Resistant
- Temperature setting
- Future application prospects
Nitinol materials play an increasingly important role in the field of sanitary ware, but they still have shortcomings such as high processing costs and long production cycles in the actual production and processing process. Currently, they are mainly used in high-end sanitary ware brands. With the in-depth research on the properties of Nitinol alloys and the continuous development of technology, Nitinol spring will be more popular in sanitary equipment all over the world.
XOT metals provide nickle titanium spring)with competitive price and various specifications. nickle titanium spring by round nitinol wire, with minimum 0.2mm Nitinol wire diameter, strength and size per drawing.
Nitinol spring by flat nitinol wire, wire size, strength and size per drawings
One-way shape memory nitinol spring
Nitinol Spring that can be compressed (Nitinol Compression Coils / Nitinol Compression Spring) or stretched (Nitinol Tension Springs) at temperature higher than Af point. One way can not be recovered with temperature.
Two-way shape memory nitinol spring
Nitinol Spring that can be compressed (Nitinol Compression Coils / Nitinol Compression Spring) or stretched (Nitinol Tension Springs) at temperature higher than Af point. Two way nitinol spring will be recovered with temperature, can be deformed repeatedlyTwo-way shape memory spring is widely used in many fields, such as aerospace, mechanical and electronic products, biomedical, building structure, daily life (Water temperature adjustment parts in bathroom & kitchen), etc.
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Our nickle titanium spring can be used as standard compression, extension or torsion springs. Other nitinol spring ((nickle titanium spring) ) with custom wire diameter and other parameters are available, please contact us. We also provide nitinol spring (nickle titanium spring) with flat nitinol wire.