Resonance bending fatigue testing machine for oil gas pipe column
A bending fatigue, oil and gas pipe technology, applied in the application of repetitive force/pulse force to test the strength of materials, measuring devices, instruments, etc., can solve problems such as fatigue failure, and achieve strong versatility, simple structure, stability and reliability. high effect
Pending Publication Date: 2021-10-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
In actual work, oil and gas pipe strings are affected by dynamic loads such as operating loads and environmental loads, and fatigue failure accidents are prone to occur
Method used
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Embodiment Construction
[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as figure 1 As shown, a resonant bending fatigue testing machine for oil and gas pipe strings is a transmission system and a support system from right to left. The specimen 6 is fixed on the support structure 7, and the static load chamber 8 is installed on the left end of the specimen 6 for Change the position of the wave node of the specimen, and install the monitoring system in the middle.
[0019] Such as figure 1 , image 3 As shown, the motor 1 is fixed on the frame, the coupling 2 connects the transmission shaft 15 and the motor 1, the eccentric block 13 cooperates with the transmission shaft 15 through a key, and the additional mass block 14 is fixed to the eccentric mass block 13 by bolts. The bearing 12 and the eccentric mass block 13 have an interference fit, the inner diameter of the flange 11 and the outer diameter of the bea...
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The invention relates to a resonance bending fatigue testing machine for an oil gas pipe column, which belongs to the technical field of mechanical part fatigue durability tests and mainly comprises a supporting system, a transmission system and a monitoring system. A movable supporting design is adopted, the spatial position of the supporting structure can be moved according to the size of a test piece, and the vibration reduction function is achieved through a tire; the supporting structure of the testing machine adopts an opening and closing type design, so that the testing requirements of test pieces with different sizes can be met, and the applicability is good; the transmission part of the testing machine can realize frequency modulation and amplitude modulation of excitation loads at the same time by changing the rotating speed of a motor, adapting to the resonant frequency of a test piece, adjusting the mass of an additional mass block and applying different excitation loads, so that the excitation load requirements of resonance bending tests of test pieces with different sizes are met, and the universality is relatively high; the structure of the testing machine is simplified, the applicability is improved, and the testing machine can be widely applied to fatigue tests of various test pieces.
Description
technical field [0001] The invention relates to a resonance bending fatigue testing machine for oil and gas pipe strings, which is a resonance bending fatigue testing device for fatigue durability testing of oil and gas drilling and production pipe strings. Background technique [0002] Oil and gas string is the key equipment for oil and gas drilling, mainly including riser, drill pipe, standpipe, casing, wellhead, etc. In actual work, oil and gas strings are affected by dynamic loads such as operating loads and environmental loads, and fatigue failure accidents are prone to occur. In order to accurately predict and improve the fatigue life of the oil and gas tubing string and ensure the safety of the operation, it is necessary to carry out the fatigue durability test of the oil and gas tubing string to determine the fatigue performance S-N curve of the oil and gas tubing string. Fatigue test methods mainly include tensile method, four-point bending method, rotary bending m...
Claims
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Login to View More IPC IPC(8): G01N3/38
CPCG01N3/38G01N2203/0005G01N2203/0023G01N2203/005
Inventor 刘秀全李家仪王仕超时岩陈国明畅元江
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)