Experimental Study and Finite Element Analysis of the Performance of Reciprocating Seal in Rapping Device of Gasifier

Abstract

The performance of reciprocating seals in rapping device of gasifier was studied through finite element method. The contact stress, Von-Mises stress, and friction power loss of O-ring and Sliding-ring combined Seal-ring were obtained. Meanwhile, the experimental study in performance of seal structures of rapping device were carried out. The results show that both of the seal structures are satisfied seal requirement, but compared with the Sliding-ring combined Seal-ring, the O-ring is easier to be destroyed and power loss of O-ring is higher than Sliding-ring combined Seal-ring. The results also verify the superiority of Sliding-ring combined Seal-ring in rapping device of gasifier.

Study on dynamic sealing performance of combined sealing structure of telescopic type of downhole robot by using HTHP coupling method

“…According to the analysis of heat transfer, the thermodynamic related coefficient of the combined sealing material is obtained, as is shown in Table 2. 19 Comparing with the O-ring of FSCSS, the elastic modulus of piston and piston guide rod in the model is far greater than that of the O-ring. Therefore, the analytical rigid body is used and the grid division is shown in Table 3.…”

“…According to the analysis of heat transfer, the thermodynamic related coefficient of the combined sealing material is obtained, as is shown in Table 2 . 19 …”

Structure design and sealing performance analysis of the sealing mechanism of the drilling tractor

“…According to the actual application conditions of the combined seal structure, and in combination with the numerical simulation analysis of the friction state under the startup and shutdown wear conditions and normal operation conditions, 34–36 the material constants of the rubber seal ring are C 10 = 1.87 MPa and C 01 = 0.47 MPa when the ambient temperature is 20°C, C 10 = 0.63 MPa and C 01 = 0.158 MPa when the ambient temperature is 120°C, as shown in the following Table 2:…”

“…where, W is strain energy density, C 10 , C 01 are Material Mooney-Rivlin model coefficient, I 1 , I 2 are first and second strain tensor invariants. According to the actual application conditions of the combined seal structure, and in combination with the numerical simulation analysis of the friction state under the startup and shutdown wear conditions and normal operation conditions, [34][35][36] the material constants of the rubber seal ring are C 10 = 1.87 MPa and C 01 = 0.47 MPa when the ambient temperature is 20 C, C 10 = 0.63 MPa and C 01 = 0.158 MPa when the ambient temperature is 120 C, as shown in the following Table 2: 3.2 | Pre-processing of the combined sealing structure model of the drilling tractor 1. Establish three combined sealing structures According to the three combined sealing structures selected in the sealing system of the drilling tractor, the triangular combined sealing structure, the U-shaped combined sealing structure and the right-angle combined sealing structure, according to the standard of the combined sealing structure, the different combined sealing structures of the drilling tractor are structured in the circumferential direction.…”

Study on lubrication characteristics of rotary combination seals under stress relaxation

“…The current research on the lubrication characteristics of combination seals is mainly focused on reciprocating seals. In order to understand the lubrication characteristics of combination seals, Peng et al [6] , Xiang et al [7] , Yang et al [8] and Li et al [9] have conducted a lot of studies. According to their results, it can be found that the combined seal can withstand pressures in excess of 60 MPa.…”