A kind of fretting friction and wear test device and method of bolt connection interface

A connection interface, fretting friction technology, used in measuring devices, testing wear resistance, instruments, etc., can solve the problems of low relative displacement test accuracy, unstable excitation input, etc., to shorten the test time, high measurement reliability, The effect of avoiding equipment damage

Active Publication Date: 2021-07-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

It should be noted that this type of device has the disadvantages of unstable excitation input during resonance and low relative displacement test accuracy due to the use of resonance-induced mass block inertial force to achieve indirect testing and the use of electromagnetic exciters for excitation.

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  • A kind of fretting friction and wear test device and method of bolt connection interface
  • A kind of fretting friction and wear test device and method of bolt connection interface
  • A kind of fretting friction and wear test device and method of bolt connection interface

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Embodiment Construction

[0035] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036]In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

[0037] Such as figure 1 As shown, the presen...

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Abstract

A bolt connection interface fretting friction and wear testing device of the present invention includes an excitation system, a measurement system, a test piece and a support system; the test piece and support system include a bolt connection test piece, a flexible guide plate, an external support frame and a base; The excitation system includes piezoelectric actuators, signal generators, power amplifiers, knobs and force transmission balls; the measurement system includes support blocks, dynamic force sensors, ring dynamic force sensors, laser vibrometers, optical lenses and data acquisition device; the present invention utilizes the high-precision bolt interface friction and wear testing device driven by the piezoelectric actuator for closed-loop control, and considers broadband excitation, closed-loop control, and precise optical displacement measurement at the same time, and can realize friction and wear testing in various working conditions. And it is easy to expand to other connection forms and test pieces. In addition, the device has several protective measures to avoid equipment damage.

Description

technical field [0001] The invention belongs to the field of material friction and wear testing, and in particular relates to a fretting friction and wear testing device for a bolt connection interface. Background technique [0002] Special equipment such as on-orbit space stations, nuclear weapons, and strategic missiles are subjected to various dynamic loads during their service periods. Friction and wear phenomena such as material damage and surface morphology changes are prone to occur on the interfaces of bolted parts on them, which will lead to overall equipment failure. The reliability of the system is greatly reduced, and even catastrophic accidents occur. Testing the friction and wear characteristics of the bolted connection interface can provide important data support for the design optimization, reliability analysis, life prediction, and health monitoring of these equipment. [0003] The purpose of the fretting friction and wear test is to measure the relative di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/56G01N3/02
CPCG01N3/02G01N3/56
Inventor 徐超李东武张之树郭宁
Owner NORTHWESTERN POLYTECHNICAL UNIV
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