Ultrasonic motor-based regulated magnetorheological vibration isolator

A magnetorheological vibration isolator regulated by an ultrasonic motor, comprising:

• a base;
• a plurality of magnetorheological dampers;
• and
• a plurality of adapter plates;
• wherein
• each of the plurality of adapter plates is connected to the base through the plurality of magnetorheological dampers and configured to be connected to a vibration-to-be-isolated device, and
• each of the plurality of magnetorheological dampers comprises a lower cover plate, a lower cavity, a connecting ring, a permanent magnet, orifices, an upper cavity, an upper cover plate, an upper thrust rod, an upper gland, a paramagnet, a lower gland, a magnetic conducting ring, a fixing ring, a housing, an ultrasonic motor, and a lower thrust rod;
• and wherein
• one end of the upper thrust rod is connected to the connecting ring, to serve as an output end or an input end for vibration isolation, and the upper thrust rod is connected to the adapter plate;
• the lower thrust rod is installed at a middle portion of the lower cover plate, to serve as the input end or the output end for vibration isolation, and the lower thrust rod is connected to the base;
• the lower cover plate and the upper cover plate are connected via the housing;
• the connecting ring is welded with corrugated pipes to form the lower cavity and the upper cavity, and the lower cavity and the upper cavity are filled with a magnetorheological fluid;
• the connecting ring is equally divided in a circumferential direction into 2n areas each having a central angle of π/n, wherein n is a natural number, at least a part of the orifices are distributed in one area of each two adjacent areas of the 2n areas, and there are no orifices in the other area of the two adjacent areas;
• the magnetic conducting ring is installed at an outer side of the connecting ring, the permanent magnet and the paramagnet are installed at an inner side of the connecting ring in an alternative manner, and the permanent magnet and the paramagnet are installed on an output shaft of the ultrasonic motor via the upper gland and the lower gland;
• one corrugated pipe, which defines the lower cavity, of the corrugated pipes, is located at an outer side of the ultrasonic motor, an end of the lower cavity and an end of the upper cavity are pressed by the lower cover plate and the upper cover plate respectively, to realize parallel connection of the corrugated pipes corresponding to the lower cavity and the upper cavity;
• and
• in a case that the input end and the output end for vibration isolation move relative to each other under an effect of a load, the connecting ring moves up and down relative to the housing, and the magnetorheological fluid in the lower cavity and the upper cavity is squeezed from one of the lower cavity and the upper cavity into the other through the orifices.