Objective Aiming at the energy leakage caused by lateral contact in the design of vibration isolation structure of vibration-isolation thrust bearing, the improved design idea of vibration isolation structure is put forward, and the structural improvement optimization and vibration characteristics experimental study are carried out.

Methods The mechanism and key parameters of lateral contact problem of vibration isolation structure are studied. The excitation test-bed of variable load mass-stiffness system is designed. The idea of improved design of thrust bearing vibration isolation structure is put forward, the effect of structural improvement on vibration transmission characteristics and the longitudinal damping effect of using vibration-isolation thrust bearing are studied.

Results The research results show that the lateral contact damping problem of the improved vibration isolation structure with symmetrical arrangement of double springs and double linear rolling bearings is obviously improved, and the vibration characteristic curve of the improved vibration isolation structure is basically close to that of pure spring.

Conclusion The optimization method of vibration isolation structure can provide important reference for optimization and improvement design of vibration isolation thrust bearing.