流固耦合下生物质致密成型机振动单元设计及试验

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键词：生物质致密成型机；振动单元；偏置式曲柄滑块；动压油膜；流固耦合中图分类号：S216.2 文献标识码：A 文章编号：2095-5553（2026）02-0256-06

Design and test of vibration unit of biomass densification molding machine under fluid-solid coupling

Du Xiaochen1·²，Yang Xianyong1²， Fan Chunmao1²，Ma Yanhua 1⋅2 （1. CollegeofMechanicaland Electrical Engineeing，InnerMongolia Agricultural University，Hohhot，OOl8，China; 2.InnerMongolia EngineeringResearch CenterofIntelligentEquipmentfor theEntireProcess ofForageand FeedProduction，Hohhot，Olool8，China）

Abstract：Toachieve the vibrationcompresionof biomass，a mechanical vibrationunit was designedwith theoffset crank-slider mechanism as thecore component.However，the reciprocating motionof the slider causes uneven pressure on onesideof the sliderail，accelerating wear betweencomponentsandcompromising thevibrationunit'sstability.To addressthis issue，this design proposes to process a“clawshapedoil circuit”on the sliderail and inject high-pressureoil togenerateadynamicpressureoilfilmbetweenthesliderandthesliderailUndertheefectofthefilm，theslider moves smoothlyalong the sliderail.Athree-dimensional modelof the crank-slider mechanismandoil filmwas developed，and fluid—structure interactionanalysis wasperformedtoevaluatethe stressdispersion effectof dynamicoilfilmon the slide rail.Theoperationalreliabilityofthevibrationunit wasverifiedbyno-loadandcompactforming tests.Thetestresults showthat adding a dynamic pressure oil filmto theoffset crank slider mechanism，the torque fluctuation amplitude of the system is significantly reduced，which is reduced by about 23.1% ， 48.1% and 37.0% at the vibration frequencies of 10Hz ， 15Hz and 20Hz respectively. This structure can effectively improve the stability of the vibration system and provide a basis for subsequent research and optimization.

Keywords：biomass densification molding machine；vibrationunit；offset crank slider；dynamicpressre oil film; fluid-solid coupling

0 引言

生物质能已成为继煤炭、石油和天然气之后全球第四大能源[1.2]。（剩余8084字）