Finite Element Analysis and Comparison of Flat Rubber Sealing Structures

This paper evaluates the structure of the flat sealing rings, tests the properties of material and analyzes the structure by finite element software, and then compares the results with common O-rings. The results show that the designed inner diameter of flat sealing rings can be appropriately adjusted, and the cross section compression ratio and the compression ratio of flat sealing rings are smaller than those of O-rings. What's more, when axial movement occurs to gear wheels and there is pressure difference, the lateral stability design of the structure can prevent the sealing faces from completely touching the side of the groove and keep the sealing rings staying at a more appropriate position. The results of the finite element analysis show that the radial sealing force of flat sealing rings increases rapidly under the effect of the inside and outside pressure difference, and their radial sealing force is equal to that of O-rings at 0.5 MPa. Compared with O-rings, flat sealing rings are more stable, and have a longer life at the same drilling condition.