Suction foot mechanism optimization for axial force curve matching of miniature scroll compressors
The axial gas force of a miniature scroll compressor varies significantly with the crankshaft angle,posing challenges for achieving effective axial sealing.To address this issue,a suction foot mechanism that used the axial magnetic force of a permanent magnet to balance the axial gas force was proposed.Firstly,the axial gas force characteristics of the miniature scroll compressor were analyzed to determine the target axial force curve.Secondly,a three-dimensional simulation model was established based on JMAG.The position of the permanent magnets was optimized by genetic algorithm to achieve the goal of the maximum trend of axial force change.Then based on the position optimization of the permanent magnets,four different suction foot blocking cases were proposed.It could adapt to the axial force curve that changed with the orbiting scroll disk's translation.Finally,a sensitivity analysis of the blocking suction foot heights for the final choice option was performed,fixing the height of the block with low sensitivity reduced the complexity of actual fabrication and assembly.The accuracy of the axial force of the optimized suction foot mechanism was verified through simulation and experimental tests.The results show that changing the position of the magnet in the fixed ring increases the maximum value of axial force by 27.56%.Among all cases,the more blocks,the better balance of the suction mechanism.And the circumferential cut is better than the radial cut.The integral difference of the circumferential cut is reduced by 42.91%compared to the radial cut.The maximum error of the optimized suction foot mechanism after experimental verification is only 6.2%,which is in excellent agreement with the simulation results.It largely solves the problem of axial sealing in miniature scroll compressors.
NETL
NSTL
万方数据
