公开(公告)号：US20220204060A1

公开(公告)日：2022-06-30

申请号：US17619263

申请日：2020-05-07

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Chenglong WANG ,  Yifang CHEN ,  Xueqian WEI ,  Xueting WANG ,  Meng CHEN ,  Qingliang ZENG

IPC: B61G11/12 ,  B61G11/18 ,  B61G11/16 ,  F16F9/53 ,  F16F9/54

Abstract: An anti-impact device includes a first connector, an upper outer cylinder, a lower outer cylinder and a second connector which are sequentially connected, where a top of the lower outer cylinder is sleeved with the upper outer cylinder to be movably connected to the upper outer cylinder; an aluminum honeycomb and a magnetorheological buffer outer cylinder are arranged inside the lower outer cylinder, the aluminum honeycomb is arranged at a bottom of a lower end cover, a piston rod is arranged inside the magnetorheological buffer outer cylinder, a top end of the piston rod extends out of an upper end cover and is connected to a collision head, and the piston rod between the collision head and the upper end cover is sleeved with a return spring; and an electromagnetic coil is wound around the piston rod, a damping piston is arranged at a lower part of the piston rod.

公开(公告)号：US20220090697A1

公开(公告)日：2022-03-24

申请号：US17435704

申请日：2020-05-07

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Chenglong WANG ,  Genyuan MIAO ,  Yifang CHEN ,  Xueting WANG ,  Meng CHEN ,  Qingliang ZENG

IPC: F16K31/42 ,  E21D23/00 ,  E21D23/26 ,  F16K37/00

Abstract: Disclosed is a magnetically controlled material-based magnetorheological pilot operated safety valve for a hydraulic support. The safety valve comprises a valve body, a valve core, a reset spring, and a pilot valve; the valve core is disposed in a valve core chamber provided in the valve body, and the pilot valve is disposed in a pilot valve chamber provided in the valve body; the pilot valve includes a magnetically controlled shape memory alloy, an electromagnet, a push rod, a piston, a magnetorheological fluid control coil, and a pilot valve core, which are arranged sequentially from left to right; a plurality of magnetically controlled material control coils are provided on the electromagnet; the magnetically controlled shape memory alloy runs through the electromagnet and is then connected to the push rod, the push rod is connected to the piston, the magnetorheological fluid lies between the piston and the pilot valve core.