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At present, the stress of general passive valves in piezoelectric micro-pump is relatively large. Under the stress, the passive valves switched frequently will be fatigue damage and be led to the failure, which will largely reduce the reliability of piezoelectric micro-pump. Aiming at this situation, a slotted cymbal shaped valve is proposed, and then a slotted cymbal shaped valve piezoelectric pump...
Considering the advantages and disadvantages of several typical no-moving-part valves which are applied in the areas of biology, medical treatment and sanitation, a new type of valveless piezoelectric pump, using tubes with combinated shape of `Y' and cone, is developed based on the novel type of tube, which aims to stress the overall advantages and overcomes other drawbacks. Theoretical analysis...
Increasing the driving frequency of piezoelectric vibrator can resolve the bottleneck of low flow of the valve piezoelectric pump. However, the using of piezoelectric pump of traditional valve body all presents the hysteretic nature of valve; macroscopic performance is up-frequency to flow-sharply. This research is to settle the bottleneck mentioned above: firstly, through the sub-experiment on various...
After detailed analysis of the coal seam water infusion mathematical model and principle of automatic control system, we design a water infusion control system based on single-chips in this paper. It has improved the effect of coal seam water infusion by monitoring and controlling of flow and pressure of the multi-way water holes at the same time. It is much easier to manage the coal seam water infusion...
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