Design Of Hybrid Wraps For Scroll Compressor And Finite Element Analysis Of Scroll Tooth

Scroll compressor is a new type compressor developed recently. It has characteristics of high efficency, low energy consumption, compact structure and working smoothly. But due to its own structure limitation, the conventional scroll compressor of single wrap shows its defect on some aspects such as further increasing its volume ratio and space utilization, and other extending application fields. When a new style of scroll compressor with higher pressure-ratio is developed, the number of turns has to be increased and this will lead to a longer leak profile. Furthermore, leakage between different working chambers will be increased, the efficiency will decline and the machining cost is also rise up.For this situation, this paper applies the hybrid wraps to optimize the single scroll profile, and uses the own characteristics of these different meshing curves to make the hybrid wraps can cater to the suction, compression and exhaust, so as to improve area utilization factor, increase air displacement and compression ratio, shorten the profile of length and reduce the processing costs.This paper first discusses the meshing condition of the hybrid profile, the derivation of the general profile governing equation and the theory of plane curve . And using the method of normal-equidistant-curve to create the base circle involute-high order curve-base circle involute of hybrid wraps, and obtain the calculative equation of the dynamic volume and pressure. Second, without changing the suction, exhaust volume and compression ratio to make a optimization for the signal base circle involute scroll compressor with the example, to calculate and achieve the data of the suction, exhaust volume, working chamber pressure and profile length of the hybrid wraps of scroll compressor, and compare with the date of the previous base circle involute wraps. A result has been achieve is that the hybrid wraps can reduce the length of the leaky line significantly. Finally, this paper use ANSYS Workbench to make the analysis of stress and deformation for the vortex tooth of the two kind profiles, and compare with the stress and deformation, the result show that the stress and deformation of the two kind profile scrolls is similar, it will have no effect to the property of the compressor, so using the base circle involute-high order curve-base circle involute hybrid wraps to optimize the pr ofile length of the base circle involute profile scroll compressor is entirely feasible.