Design And Research Of A Constant Damping Spring Hanger

In the fields such as ships and thermal power generation,the carrier medium of many pipelines is high-temperature liquid or high-pressure steam.Due to the their physical properties— thermal expansion and contraction,these high temperature pipelines will have large thermal displacement deformation during operation,and may be accompanied by dangerous bending stress and stress transfer.To avoid such situations,these pipelines need to be installed with flexible supports and hangers capable of providing constant support.Based on the design principle of the combination of main and auxiliary springs,two types of spring support and hanger which can output adjustable constant force are designed and studied,and their mechanical properties and damping effect are verified in this paper.In the last part,the ideas of optimization and improvement are provided.According to the mechanical relationship and superposition principle,this paper demonstrates that the constant force output can be obtained after the main and auxiliary springs are mechanically coupled with the appropriate knife CAM.In this paper,according to this point of view,when designing the constant force support frame,the suitable stiffness coefficient of the main and auxiliary springs is firstly selected,then the outer outline design curve of the cutter cam is deduced and solved by MATLAB programming,finally completing the design of the cam;according to the knowledge of mechanical design,the 3D design of all parts of constant force hanger is completed with the help of Solid Works software,and all parts are assembled.After checking and proofreading,each part is drawn and machined.Finally complete the physical production and assembly of two three-dimensional design schemes.Then the tensile vibration test bench of constant force support hanger is designed and built,and the static tensile tests of the designed two kinds of constant force hangers are carried out under different output loads.The test results show that the supporting hangers work in static state and the constant degree of output constant force meets the initial requirements of the design.Then the dynamic vibration test of the constant force support hanger is carried out,and the force transmission rate is used to evaluate the damping effect of the constant force support hanger under dynamic interference.Finally,a scheme of optimizing the suspension and support frame is proposed,and a small hydraulic damper is designed,which is installed in the constant force hanger,and then the dynamic vibration test of the supporting and hanger frame is carried out to verify its impact on the vibration reduction effect of the supporting and hanger frame,so as to verify the optimization effect.The constant force output of the main and auxiliary spring type constant force support hanger is stable,which has certain reference significance for the optimal design of constant force hangers.