Single electric signal excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device

Abstract

The invention discloses a single electric signal excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device which is mainly applied to accurate and precise conveying of strip-shaped materials. According to the single electric signal excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device, multiple vibrators are adopted as shock excitation bodies and divided into two sets, and the two sets of vibrators are arranged in an alternated opposite mode. Each vibrator comprises an ultrasonic vibration energy converter, an elliptic vibration mode converter and a friction driving block arranged at the front end of the elliptic vibration mode converter. Each ultrasonic vibration energy converter comprises a bolt, a rear cover plate, a piezoelectric ceramic piece, an electrode plate and a front cover plate, wherein the rear cover plate, the piezoelectric ceramic piece, the electrode plate and the front cover plate are arranged on the bolt in sequence in a sleeving mode. The rear cover plates, the piezoelectric ceramic pieces, the electrode plates and the front cover plates are connected and pressed through the rear cover plates, the front cover plates and the bolts. Each elliptic vibration mode converter is arranged at the front end of the corresponding ultrasonic vibration energy converter and is integrally cylindrical, and three rectangular notches which are distributed in a staggered mode are formed in the left side and the right side of each elliptic vibration mode converter.

Description

technical field [0001] The invention relates to the field of vibration precision conveying using the inverse piezoelectric effect of piezoelectric ceramics, in particular to a multi-vibrator material bidirectional conveying device driven by ultrasonic elliptical vibration generated by excitation of a single electric signal. Background technique [0002] In the fields of automatic production, processing and assembly of medicine, chemical industry, food, machinery, material preparation, etc., the transmission and assembly of materials and parts have been using traditional low-frequency and high-amplitude electromagnetic vibration transmission devices. This device has more noise when working. The distribution accuracy is low, it is not easy to realize precise closed-loop control, and the power volume is small. These problems have always restricted the improvement of the overall performance of the precision transmission system. [0003] The rapid development and application of u...

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Problems solved by technology

[0002] In the fields of automatic production, processing and assembly of medicine, chemical industry, food, machinery, material preparation, etc., the transmission and assembly of materials and parts have been using traditional low-frequency and high-amplitude electromagnetic vibration transmission devices. This device has more noise when working. Low delivery accuracy, difficult to achieve precise closed-loop control, and small power volume, these problems have always restricted the improvement of the overall performance of the precision transmission system

[0004] However, the existing traveling wave ultrasonic conveying devices have the disadvantages of large traveling wave attenuation, limited long-distance transportation, uneven distribution of materials in the conveying length, complex structure, low output power, difficult manufacturing, and high requirements for manufacturing and assembly. , high cost and short lifespan

These problems restrict their application in industrial production

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