| The mian technical problem of rotary vane actuator(RVA) is to ensure thepressure of vane working oil chamber, which is affected by one of main factors-therotary seal. Rotating seal surface contact pressure is an important factor indetermining the sealing performance.RVA rotating seal is treated as the object of study. Main works and achievementsare as follows.(1)The sealing mechanism of rotary seal has been investigated. Rectangularcross-section rotating seal contact pressure theory is established, and both of thefailure mechanism and synergistic mechanism are explored, preliminary.(2)A simplified model of the RVA rotary seal is established in two-dimensionalaxisymmetric. The finite element analysis（FEA） is used to simulate the mechanicalbehavior of O-shaped sectional rotary sea, to investigate the effect of some parameterson contact pressure, such as compression ratio, oil pressure and so on. Thecorresponding mathematical model of contact pressure is achieved, which is verifiedby FEA.(3) Finite element model of rectangular sectional rotary seal is established, andmain influencing factors of the contact pressure are taken into account, whichcontributes to getting relevant mathematical model verified by FEA. Compared twokinds of cross section shape of the seals, the last is more suitable for RVA.(4)Based on reference prototype size and the last mathematical model,rectangular section seal is designed, which is squeezed out and avoid by the use ofseal support, and the structure is optimized. Based on the prototype test, RVA rotatingsealing performance is good.The research work of this paper play a theoretical reference for understandingRVA contact pressure distribution, influencing factors and designing of RVA. |
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