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A multi-bolt loosening test machine under combined loading of flanges under tension, bending and torsion

A composite loading and testing machine technology, applied in the testing of mechanical components, testing of machine/structural components, instruments, etc.

Active Publication Date: 2019-10-11
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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At present, there is no relevant patent on the multi-bolt loosening test machine

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  • A multi-bolt loosening test machine under combined loading of flanges under tension, bending and torsion

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Embodiment Construction

[0019] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0020] Such as figure 1 Shown:

[0021] A multi-bolt loosening testing machine for flanges under combined tension-bending-torsion loading is composed of three parts, namely an axial load transmission part, a lateral load transmission part and a torque load transmission part;

[0022] The axial load transfer part includes a lower clamping plate 18, a thin test piece 19, a thick test piece 20, a test piece bolt 21, a bearing cap 23, a thrust ball bearing 24, an upper clamping plate 25, and an axial load support 26 and hydraulic puller 27; the lower clamping plate 18 and the axial loading support 26 are all fixed on the abutment 35; the thin test piece 19 and the thick test piece 20 are assembled together correspondingly, and the The bolts 21 are fixed in the corresponding bolt holes; the thin test piece 19 ...

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Abstract

The invention provides a flange tensile-flexural-torsional composite loading multi-bolt loosening testing machine, which can simultaneously apply tensile-bending-torsional composite load to a multi-bolt connected flange to study the bolt loosening characteristics. The testing machine belongs to the technical field of mechanical testing equipment. Transverse load generated by a three-phase asynchronous motor is taken as bending load applied to the flange, tensile force generated by a hydraulic puller is taken as axial tensile load, and torque generated by a servo motor is taken as torque load applied to the flange. Different from a conventional apparatus that applies two types of composite load to a single bolt, the testing machine can apply three types of composite load to the multi-bolt connected flange. The three types of composite load can be isolated from each other and do not interfere with each other, and load applied can be displayed in real time.

Description

technical field [0001] The invention belongs to the technical field of mechanical testing equipment, and relates to a multi-bolt loosening testing machine under combined loading of flanges under tension, bending and torsion. Background technique [0002] The bolt loosening test machine can be used to study the loosening of bolts under load. The bolt loosening test machines currently in use are divided into the following types: [0003] 1. It is the Junker type loosening test method [0004] Such as GB / T 10431-2008. The Junker type loosening test machine mainly applies alternating lateral loads to the preloaded fasteners to cause lateral movement. This lateral movement causes the bolt and nut to wobble relative to each other, resulting in greater microscopic slippage of the thread interface, causing rapid loosening of the fastener. It loosens fasteners faster than any previous test method. [0005] 2. Electro-hydraulic servo control vibration method [0006] During the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
Inventor 马跃张豹林清源孙清超孙伟
Owner DALIAN UNIV OF TECH
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