Abstract: Disclosed is a dynamic wall heat exchange device based on piezoelectric excitation, comprising a base support. A sidewall of the base support is provided with a strip-shaped opening, and a low-temperature heat source runner is arranged in the strip-shaped opening. The base support is further provided with a high-temperature heat source runner. The high-temperature heat source runner comprises a main pipe erected on the base support. The main pipe is sleeved with a heat exchange sleeve, and corrugated pipes are connected to the main pipe in series. The low-temperature heat source runner also penetrates through the heat exchange sleeve. The base support is provided with a plurality of elastic cantilever arms, the lower ends of each of the elastic cantilever arms is provided with an inertial mass block, and a piezoelectric stack is arranged between the elastic cantilever arm and the inertial mass block.

Abstract: A robot having four screw propeller barrels and able to walk on all types of terrains is provided and includes: a housing, wherein each of four corners of the housing is arranged with a driving shaft, four driving shafts are arranged for the four corners and form a rectangle and are connected to a motor, a rotation surface of the driving shaft is parallel to a same vertical surface. An end of the driving shaft is arranged with a connection base, the connection base is arranged with a shaftless motor, an output end of the shaftless motor has a rotation surface perpendicular to the rotation surface of the driving shaft. The output end of the shaftless motor is arranged with a connection bracket, a bottom surface of the connection bracket is arranged with a plurality of connection rings arranged successively along a straight line.