Piezoelectric pump

摘要

The piezoelectric pump comprises a housing, containing the following components connected in series: a rear piezoelectric clamp section, a piezoelectric extender section and a front piezoelectric clamp section. A displacer of pumped fluid is connected to the front piezoelectric clamp section. Electric pulses accessing at sections from a control station cause said sections to become fixed alternately inside the housing. Under the effect of electric pulses, the piezoelectric extender section moves the displacer step-by-step in one direction. Positive effect achieved by the invention is that of increasing the service life of the piezoelectric pump, expanding the scope of use thereof by increasing the number of fluids that can be pumped and also providing for a greater pressure by preventing contact between the pumped fluid and the friction surfaces of the housing and the piezoelectric clamp sections.

主权项

1. A piezoelectric pump, comprising:
a housing-having an imaginary longitudinal axis, the housing containing:
a rear piezoelectric clamp section including: a first frame and a first piezoelectric stack within the first frame, the first piezoelectric stack being configured, in response to being supplied with electrical voltage, to cause the first frame to press the housing from inside thereof in a direction transverse of the imaginary longitudinal axis,a piezoelectric extender section that is movable relative to the housing along the imaginary longitudinal axis,a front piezoelectric clamp section including a second frame and a second piezoelectric stack within the second frame, the second piezoelectric stack being configured, in response to being supplied with electrical voltage, to cause the second frame to press the housing from inside thereof in the direction transverse of the imaginary longitudinal axis, and
a fluid displacer of pumped fluid coupled to the front piezoelectric clamp section;the rear piezoelectric clamp section, the piezoelectric extender section and the front piezoelectric clamp section being connected in series along the imaginary longitudinal axis,wherein the housing comprises two friction plates and two lateral plates.