Industrial Technology Research Institute

Chih-Chieh Lin

Chun-Hung Huang

Ya-Wen Chou

Dong-Jou Shien

Meen-Dau Hoo

A microfluidic pump driven by thermoacoustic effect is mainly composed of a thermoacoustic device, a fluid-storing tank, and at least one microchannel, etc., wherein the thermoacoustic device may convert thermal energy into acoustic energy. Pressure fluctuation and velocity fluctuation with high frequency are generated by the acoustic wave. According to the high amplitude pressure fluctuation, the microfluid with high moving velocity emitted through microchannels. Since there is no movable part arranged in the thermo-acoustic generator. In the meantime, it indirectly drives the working fluid located in the fluid-storing tank by the manner of indirect contact. So the present invention may be applied in the non-conductive fluid so as to greatly extend its field of application. Moreover, the characteristics of the fluid won't be influenced by the heating process as well. The present invention is indeed a microfluid-driving device that has inventiveness and high application value.

Microfluidic pump driven by thermoacoustic effect

A main shaft locating mechanism for change of tool, comprising a locating seat disposed with an eccentric, and a splined shaft disposed with a disk having an eccentric locating pin corresponding to the eccentric hole of the locating seat and adapted to axially fit thereinto. The disk and eccentric locating pin are formed with several orifices from which high pressure gas is injected, forming a gas pad between the eccentric locating pin and the locating seat to greatly reduce friction therebetween before the eccentric locating pin is fitted with the locating seat, whereby the main shaft stops rotating before the the tool is loosened. After the main shaft is stopped and located and the tool is loosened, the direction of the high pressure gas is changed to blow into the mandrel so as to clear up cutting chips accumulated therein for facilitating next tool-changing operation.

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Taichung, Taiwan

Chih-Chieh Lin