Rigidity-controllable magnetorheological rubber node with fail-safe characteristic
A magneto-rheological rubber and fail-safe technology, which is applied in the self-adjustment of wheel axles, railway car body parts, bogies, etc., can solve problems such as failures, and achieve the effect of strong practicability and fail-safe characteristics
Active Publication Date: 2022-03-08
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology
The current passive rubber joints cannot meet the two stiffness requirements. In order to solve the shortcomings of the current rubber joints, the present invention proposes a stiffness-controllable magneto-rheological rubber joint with fail-safe characteristics.
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[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. But following embodiment only limits to explain the present invention, and protection scope of the present invention should comprise the whole content of claim, and by the narration of following embodiment, those skilled in the art can fully realize the whole content of claim of the present invention.
[0022] like figure 1 As shown, the stiffness controllable magneto-rheological rubber node with fail-safe characteristics in the present invention includes a node mandrel 1, a steel ring 2, an excitation coil 3, a magnetic tile 4, a magnetorheological elastomer 5, and a node jacket 6, etc. . The node mandrel 1 is located at the center of the rubber node, the steel ring 2 is in interference fit with the three-section cylindrical surface of the node mandrel 1, the excitation coil 3 is wound between the coil slots of the node mandrel 1, and the mag...
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According to the rigidity-controllable magnetorheological rubber node with the fault safety characteristic, the elastic modulus of a magnetorheological elastomer can be changed by applying current, so that the radial rigidity of the node is changed. Specifically, the rigidity-controllable magneto-rheological rubber node provided by the invention mainly comprises a magneto-rheological elastomer (MRE), a magnet exciting coil, a node jacket, a node mandrel, a magnetic shoe, a steel ring and the like. The magnetic tile is used for providing an initial magnetic field, so that the rubber node shows high rigidity in an uncontrolled state, and the high-speed stability requirement of a train is met firstly, so that the fault safety characteristic is achieved; when the magnet exciting coil is powered on, an electromagnetic field opposite to the magnetic shoe is generated, the magnetic field intensity penetrating through the magnetorheological elastomer is reduced, and therefore the radial rigidity of the node is reduced, and the train curve trafficability requirement is met. The rubber node belongs to semi-active control, and has the characteristics of low energy consumption, compact and simple structure, high safety, capability of being universally replaced with the existing passive train rubber node, and the like.
Description
technical field [0001] The invention relates to the technical field of rubber nodes for trains, in particular to a stiffness-controllable magnetorheological rubber node with fail-safe characteristics. Background technique [0002] With the rapid development of high-speed railways, the research on the stability, comfort and safety of high-speed railways is becoming more and more critical. The requirements for the stiffness of the bogie are contradictory when the train is running straight and passing through a curve. When traveling in a straight line at high speed, the bogie is mainly required to have a large rigidity to ensure the stability and safety of the train; when the train passes through a curve, the longitudinal stiffness of the bogie system is required to be small for steering, thereby improving the curve passing performance of the railway locomotive . Therefore, the present invention proposes a stiffness-controllable magneto-rheological rubber node with fail-safe ...
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IPC IPC(8): B61F5/38
CPCB61F5/38B61F5/386
Inventor 孙帅帅巩宁龚兴龙张世武
Owner UNIV OF SCI & TECH OF CHINA