公开(公告)号：US20200080905A1

公开(公告)日：2020-03-12

申请号：US16613404

申请日：2018-03-15

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Qingchao SUN ,  Bao ZHANG ,  Qingyuan LIN ,  Wei SUN ,  Bin YANG

IPC: G01L5/24 ,  G01L5/00

Abstract: The present invention belongs to the technical field of mechanical test devices, and provides a multi-bolt loosening test machine for flange with tension and bending compound loading, which is a test machine researching the anti-looseness properties of bolts by applying tension, bending and torsion compound loading to multi-bolt connection flanges. The multi-bolt loosening test machine for flange with tension and bending compound loading uses a transverse load generated by a three-phase asynchronous motor as a bending load applied to a flange, uses a tension force generated by a hydraulic puller as an axial tension load, is different from the current device that can apply two compound loads to a single bolt, and can apply two compound loads to the multi-bolt connection flanges. The present invention can isolate two compound loads from each other without interference, and display the applied loads in real time.

公开(公告)号：US20200018673A1

公开(公告)日：2020-01-16

申请号：US16338872

申请日：2017-09-08

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Qingchao SUN ,  Bao ZHANG ,  Chuanhua WANG ,  Wei SUN ,  Yue MA

IPC: G01N3/24 ,  G05B19/04

Abstract: A closed-loop control method based on a testing machine for accurately controlling the loosening of a bolt transverse load is disclosed. The testing machine for accurately controlling the loosening of the transverse load comprises a load generating motor, a load transfer mechanism, a load control motor and a load control mechanism. The control method of the present invention controls the load generating motor to drive the load transfer mechanism based on control commands, displacement signals collected by the displacement sensor and force signals collected by an S-shaped column type pressure sensor. The testing machine for the looseness of the bolt transverse load is essential in the aspect of exploring a looseness law of a bolt, and can be used to simulate load bearing conditions of the bolt. However, under the condition that some bolts bear constant force load transversely, the testing machine is not used or is inaccurate. The control method of the present invention can accurately control the load transverse load to be stable, especially can ensure constant transverse load and can also simulate the transverse load bearing situation of the bolt more accurately and more comprehensively.

公开(公告)号：US20190170492A1

公开(公告)日：2019-06-06

申请号：US16321315

申请日：2017-05-03

Applicant: Dalian University of Technology

Inventor： Qingchao SUN ,  Jue WANG ,  Xin LIU ,  Wei SUN ,  Yingjie JIANG ,  Jiaqi SUO

IPC: G01B5/20

Abstract: Disclosed is a system for shape error in-situ measurement of large-scale torus, which comprises an attitude adjusting part, a rotating part and a measuring part. The attitude adjusting part comprises an attitude adjusting platform, an attitude adjusting platform motor and an adapter panel, wherein the attitude adjusting platform can adjust the rotation angles along z-axis and x-axis, the angle adjusted is controlled by the attitude adjusting platform motor, and the attitude adjusting part is connected with the rotating part through the adapter panel; the rotating part comprises a rotating index plate base and a high-precision rotating index plate which is released from fixation by a lever for rotating, rotated manually for a required angle, and then fixed again by restoring the lever; the measuring part comprises a sensor clamp, sensor holders, contact sensors and associated equipment, wherein the sensor clamp is positioned with the rotating index plate by a mandrel and then fixed by two bolts and nuts; and the sensor clamp has four groups of sensor jacks in total, with at least three jacks in each group, and a sensor holder is installed in each sensor jack and used for fixing each sensor.