Lightweight ultrasonic motor and method for preparing plastic stator of ultrasonic motor
An ultrasonic motor and plastic stator technology, which is applied in the directions of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc. Long cycle is disadvantageous and other problems, to achieve the effect of being beneficial to mass production, improving friction and wear performance, and simple assembly process
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[0028] A method for preparing a plastic stator of a lightweight ultrasonic motor, comprising the steps of:
[0029] Step 1, raw material ratio: take by weight as follows:
[0030] Polymer matrix: 30%-70%; wherein, the polymer matrix is a mixture of one or more of polyphenylene sulfide, polytetrafluoroethylene, polyphenylene ester, and polyimide; the particle size of the polymer matrix is 400-1000 mesh;
[0031] Reinforcement fiber: 10%-35%; wherein, the reinforcement fiber is a mixture of one or more of carbon fiber, glass fiber, potassium carbonate whisker, and aramid fiber;
[0032] Friction and heat conduction improver: 5%-20%; wherein, the friction and heat conduction improver is one or a mixture of nano-copper powder, nano-diamond powder, nickel powder, and rare earth powder;
[0033] Add twin-screw extruder to blend, extrude and granulate, and set the temperature at 330°C to 360°C;
[0034] Step 2. Injection-molding the extruded blend into a tooth-shaped plastic sta...
Embodiment 1
[0039] Embodiment 1: The tooth-shaped plastic stator is as follows in terms of weight percentage: 85% polyphenylene sulfide, 5% polytetrafluoroethylene, and 10% carbon fiber.
[0040] Specific steps are as follows:
[0041] 1) Weigh polyphenylene sulfide, polytetrafluoroethylene, and carbon fiber in proportion, add them to a twin-screw extruder for blending, extrusion, and granulation, and set the temperature at 350°C;
[0042] 2) Injection molding the blend into a plastic stator, the injection molding temperature is 330°C, and the injection molding pressure is 80MPa;
[0043] 3) Modification and processing of the obtained plastic stator, assembly;
[0044] The metal-plastic composite stator prepared in this example has a friction coefficient of 0.21, a preload force of 30N is applied, the rotational speed of the ultrasonic motor is 60r / min, and the stall torque is 0.15Nm. Reduced wear increases motor life.
Embodiment 2
[0045] Embodiment 2: The tooth-shaped plastic stator is as follows in terms of weight percentage: 80% of polyetheretherketone, 5% of polyphenylene sulfide, 5% of polytetrafluoroethylene, 5% of nano-diamond, and 5% of carbon fiber.
[0046] Specific steps are as follows:
[0047] 1) Weigh polyphenylene sulfide, polytetrafluoroethylene, and carbon fiber in proportion, add them to a twin-screw extruder for blending, extrusion, and granulation, and set the temperature at 330°C;
[0048] 2) Injection molding the blend into a plastic stator, the injection molding temperature is 340°C, and the injection molding pressure is 100MPa;
[0049] 3) Modification and processing of the obtained plastic stator, assembly;
[0050] The metal-plastic composite stator prepared in this example has a friction coefficient of 0.26, a preload force of 40N is applied, the rotational speed of the ultrasonic motor is 70r / min, and the stall torque is 0.18Nm.
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