Electric Spring Fatigue Test Device for Containing Nodes
An electric spring and fatigue testing technology, applied in the field of hoisting machinery, can solve the problems of limited working capacity of the whole machine, limited number of web bars, increased cost, etc., and achieve the effects of easy debugging and maintenance, convenient simulation, and convenient processing.
Active Publication Date: 2022-05-06
TONGJI UNIV
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Problems solved by technology
[0003] (1) Limited by the volume of the node, the number of webs that can be connected to the same node is limited. For some truss structures that require the intersection of multiple webs, conventional nodes cannot meet the requirements;
[0004] (2) For traditional intersecting welded joints, the length of the intersecting line mainly depends on the section size of the web, and the length of the weld seam of the intersecting line cannot be increased, which greatly restricts the bearing capacity of the joints and ultimately limits the working capacity of the whole machine;
[0005] (3) The Z-direction force at the node is serious, and it is often necessary to use a Z-direction plate, which increases the cost
Method used
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Embodiment 1
[0046] Such as Figure 1-Figure 3 Shown, the present invention is made up of reaction force frame 2, beam 9, spring assembly 3, electric push rod 4. Weld the round tube to the punched bulge-shaped curved plate 10, and then weld the welded product to the beam 9, which is connected to the reaction force frame 21 through bolts; connect the tail end of the electric push rod 4 to the reaction force The frame 2 is connected with bolts, the push rod end of the electric push rod 4 is connected with the spring assembly 3 with bolts, and the other end of the spring assembly 3 is connected with the web bar 11 welded on the inclusive node 1 through bolts. When in use, the embedded controller is connected with the electric push rod 4, and the movement of the electric push rod 4 is controlled according to the frequency required by the experiment, so that the spring 7 in the spring assembly 3 is deformed along the guide rod 8, and the test is applied to the inclusive node 1. The load requir...
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The invention relates to an electric spring fatigue loading test device for a contained node, which is composed of a reaction force frame, a beam, an electric loading device, a spring combination, etc., and an electric push rod is welded on the beam to be tested—a new type of containment The nodes are loaded by spring combination. Compared with the hydraulic loading method, electric push rod loading has the advantages of simpler structure, lighter weight, no oil leakage, easy control, and more sensitivity; spring combination can provide dynamic load more conveniently, The simulation of fatigue load is carried out, so that the fatigue loading test of the joint is carried out. The invention can well simulate the fatigue stress characteristics similar to the inclusive joint, and has the advantages of compact structure, convenient installation, low cost and light weight.
Description
technical field [0001] The invention belongs to the fields of hoisting machinery, port machinery, marine engineering equipment and engineering machinery equipment, and in particular relates to an inclusive node fatigue testing device. Background technique [0002] The truss structure has been widely used in engineering because of its simple structure, strong bearing capacity, convenient processing, and light weight, especially in the field of hoisting machinery and construction machinery. From the current engineering practice, the damage or failure of the truss structure is mainly caused by the problems of the truss nodes. Therefore, the nodes of the truss structure play a vital role in the bearing capacity and life of the entire truss structure. Traditional truss joints generally adopt circular tube intersecting joints, gusset plate joints, etc. These joints are simple in form and easy to process, but there are often the following main problems: [0003] (1) Limited by the...
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IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 孙远韬王斌贺张氢秦仙蓉翟金金
Owner TONGJI UNIV