Ultrasonic generation device and concrete forming system

An ultrasonic generation device, comprising:

• a housing, provided with an air inlet;
• a rotary vibration member, disposed in the housing and configured for vibrating during a rotation to generate ultrasonic waves;
• and
• a shaft body, relatively fixed to the housing, wherein the rotary vibration member is sleeved on the shaft body, the rotary vibration member and the shaft body are rotatable relative to each other, the shaft body is provided with a main air passage and a jet hole, a first end of the main air passage is in communication with the air inlet and a second end of the main air passage is in communication with the jet hole, the jet hole is provided in the shaft body at a position corresponding to the rotary vibration member, and the jet hole is configured for ejecting an air flow to form an air film between the rotary vibration member and the shaft body,
• wherein a plurality of jet holes are provided and the plurality of jet holes are evenly distributed along a circumference of the shaft body,
• wherein an axis of each of the jet holes is along a radial direction of the shaft body,
• wherein an air inlet assembly is provided at a first end of the shaft body, the air inlet assembly comprises an air inlet end cover, the first end of the shaft body is inserted into the air inlet end cover, a first air guide hole is provided in the air inlet end cover, and the first air guide hole communicates the main air passage with the air inlet of the housing.