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Inertia type vibration exciter of full-size pipeline resonance fatigue testing machine

A fatigue testing machine and vibration exciter technology, which is applied in vibration testing, testing of machine/structural components, measuring devices, etc., can solve problems such as high manufacturing cost, fast wear, and large transmission noise

Pending Publication Date: 2021-08-31
天津益普科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the deficiencies in the prior art. The existing vibration exciter has problems such as complex device structure, high manufacturing cost, large transmission noise, fast wear and the like, and provides an inertial exciter for a full-scale pipeline resonance fatigue testing machine. Vibrator, the exciter can adjust the angle between the eccentric blocks, change the eccentric mass of the eccentric block, thereby adjusting the exciting force, so that the marine riser and the submarine line pipe can obtain different exciting forces for resonance bending fatigue test

Method used

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  • Inertia type vibration exciter of full-size pipeline resonance fatigue testing machine
  • Inertia type vibration exciter of full-size pipeline resonance fatigue testing machine
  • Inertia type vibration exciter of full-size pipeline resonance fatigue testing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The inertial vibrator of the full-scale pipeline resonance fatigue testing machine, including the eccentric block group, the excitation shaft 13, the bearing group and the vibrator bearing seat 15,

[0027] The eccentric mass group includes the first eccentric mass 1, the second eccentric mass 2, the third eccentric mass 5 and the fourth eccentric mass 6, the second eccentric mass 2 is installed on the first eccentric mass 1, the third eccentric mass 5 is installed on the On the four eccentric blocks 6, the first eccentric block 1 and the fourth eccentric block 6 are installed on the head end of the excitation shaft 13 through the flat key 4 sequentially from the outside to the inside,

[0028] The vibration exciter bearing seat 15 is installed on the outer side of the excitation shaft 13, and a bearing group is arranged between the vibration exciter bearing seat 15 and the excitation shaft 13. The vibration excitation shaft 13 is interference fit with the inner ring of ...

Embodiment 2

[0030] On the basis of Embodiment 1, fixing bolt holes are provided on the first eccentric block 1, the second eccentric block 2, the third eccentric block 5 and the fourth eccentric block 6, and the connecting line between the centers of the adjacent fixing bolt holes The angle between them is 30°, the second eccentric block 2 is installed on the first eccentric block 1 through connecting bolts, and the third eccentric block 5 is installed on the fourth eccentric block 6 through connecting bolts.

[0031] The included angle between the lines connecting the centers of the fixed bolt holes evenly arranged on the four eccentric blocks is 30°, assuming that the mass of a single eccentric block of the vibrator is m, the eccentricity is r, and the working speed of the vibrator is w, then a single The resulting exciting force is F=mrw 2 , by adjusting the angle between the 4 eccentric masses, the excitation force generated by each eccentric mass is vectorized, and finally the excita...

Embodiment 3

[0040] On the basis of the second embodiment, the first bearing gland 8 and the second bearing gland 11 are respectively installed on the outer ends of the bearing group, and the first bearing gland 8 and the second bearing gland 11 are connected with the exciter. The bearing seat 15 is fixedly connected.

[0041] An exciter bearing retaining ring A7 is also arranged between the first bearing gland 8 and the fourth eccentric block 6 , and an exciter bearing retaining ring B12 is arranged outside the second bearing gland 1 .

[0042] The number of bearings 9 in the bearing set is two.

[0043] Bearing spacer rings 10 are arranged between adjacently arranged bearings 9 .

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Abstract

The invention provides an inertia type vibration exciter of a full-size pipeline resonance fatigue testing machine. The inertia type vibration exciter is characterized in that a second eccentric block is mounted on a first eccentric block, a third eccentric block is mounted on a fourth eccentric block, the first eccentric block and the fourth eccentric block are sequentially mounted at the head end of a vibration excitation shaft from outside to inside through flat keys, and a vibration exciter bearing seat is mounted at the outer side of the vibration excitation shaft; a bearing set is arranged between the vibration exciter bearing seat and the vibration excitation shaft, the vibration excitation shaft is in interference fit with an inner ring of the bearing set, and an outer ring of the bearing set is in interference fit with a vibration exciter bearing seat hole; the vibration exciter bearing seat and an external flange are integrally arranged, and the vibration exciter bearing seat is used for being connected with a clamping sleeve of a pipeline so as to achieve a resonance bending fatigue test of a marine riser and a seabed line pipe. According to the vibration exciter, the included angle between the eccentric blocks can be adjusted, and the eccentric mass of the eccentric blocks can be changed, so that the exciting force can be adjusted, and the marine riser and the seabed line pipe can obtain different exciting forces to carry out the resonance bending fatigue test.

Description

technical field [0001] The invention relates to the technical field of mechanical component fatigue testing device and manufacture, and more specifically relates to an inertial vibrator of a full-scale pipeline resonance fatigue testing machine. Background technique [0002] The exciter is a device attached to some machinery and equipment to generate excitation force, and is an important part of using mechanical vibration. The vibrator can make the excited object obtain a certain form and size of vibration, so as to perform vibration and strength tests on the object. It is widely used in bending fatigue tests of marine risers and submarine pipelines. It can be seen from the working principle of the exciter that the special nature of the exciting force can be considered to be a centrifugal force with a periodically alternating direction generated by the inherent eccentric mass of the vibration source rotating around a fixed axis. It is related to the distance r and the work...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/022
Inventor 王旭彤李京鹏刘伟
Owner 天津益普科技发展有限公司