Micro rotor dynamic balance measurement pendulum

Abstract

The invention discloses a dynamic balance measuring swing frame of a miniature rotor. A rack of the swing frame is a fixed rigid guide frame; the rack, through a guide mechanism, is in guide cooperation with a support block along a horizontal swing straight line direction of the support block; a rotation stopping structure is arranged between the rack and the support block for stopping the support block from rotating around the straight line of the swing direction; and a damping device comprises two damping units which flexibly block two opposite sides along the swing direction of the support block. Thus, according to the invention, the rack for performing the elastic support function in the prior art is replaced by the rigid rack; the guide movement of the support block on the rack is used to reduce the influence of the rack rigidity on the support block guide swing; and the sensitivity of the whole swing frame in the measurement of the miniature rotor dynamic unbalance is improved.

Description

Technical field [0001] The invention relates to a micro-rotor dynamic balance measuring swing frame. Background technique [0002] At present, with the continuous development of high-speed rolling bearings in the direction of high-speed, the United States 30 years ago set the high DN value (2.5~3.0)×10 6 [mm×(r / min)] Spindle bearing research is listed as a key pre-research project, and during the "Ninth·Five" period, a DN value of 2.5×10 was also carried out for roller bearings. 6 Experimental research. According to statistics, under high DN values, the main reason for the failure of high-speed rolling bearings is no longer fatigue spalling, but surface damage and corrosion, which account for more than 70% of the total failure rate. The main cause of surface damage and corrosion It is caused by high-speed and light-load skidding, high-temperature jamming, cage fracture, wear, etc. Correspondingly, the way to improve the surface damage and corrosion of high-speed rolling bearings...

AI Technical Summary

Problems solved by technology

The swing frame adopts four elastic rods 1-2 as supports, and the rigidity of the elastic rods 1-2 should not be too small, otherwise the swing frame cannot be supported, and the rigidity and mass of the frame that are too high will also reduce the entire swing frame. The sensitivity of the frame in the dynamic unbalance measurement leads to the reduction of unbalance measurement accuracy

At the same time, the mass of the entire pendulum frame is more than 100g, and for the micro rollers with a mass of less than 10g, the unbalanced force caused by the unbalanced amount of the micro rollers is very small, so the forced excitation of the pendulum frame is also very small, so that the pendulum The quality of the frame is several times that of the miniature rollers, and the acceleration amplitude of the forced vibration of the pendulum frame is very small, which cannot be accurately measured

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