Dynamic balance measuring instrument

Abstract

The dynamic balance measuring instrument includes driving motor, driving belt, vibration measuring support, vibration measuring sensor and phase sensor. It features the vibration measuring support comprising two parallel vibration mechanisms, the driving belt driven with motor and installed between the two parallel vibration mechanisms in parallel, the vibration mechanism including base seat with hole and rack with lower end stretched into the hole. The dynamic balance measuring instrument has also air source. The hole inner wall of the base seat has several ventilating holes communicated to the air source. The rack has its lower end suspended inside the hole in the base seat, and the vibration sensor is mounted on the rack. The present invention is suitable for use in high precision, especially super high precision, dynamic balance measurement.

Description

technical field [0001] The invention belongs to the technical field of rotor dynamic balance correction, and in particular relates to a dynamic balance measuring device. Background technique [0002] In rotating products, because the rotor cannot be completely balanced, when it rotates, centrifugal force will be generated, resulting in imbalance, vibration, and even greater problems. Therefore, the quality of dynamic balance directly determines the working performance and service life of the product, and has a huge impact on the quality of the product. In particular, the current equipment is developing towards high speed, high efficiency and high precision, and the problem of dynamic balance has become increasingly prominent, and has become a key factor restricting the improvement of product quality in the entire industry in some fields. For example, in the power tool industry with a wide range of applications and huge market potential, the working speed of a large number o...

AI Technical Summary

Problems solved by technology

The pendulum with rigid support is rigid, it is installed on the ground, and the unbalanced force is transmitted to the ground while being transmitted to the rigid pendulum, so that the ground also becomes a part of the support system, so that the lower elastic constant of the ground is also Bring in the dynamic balance measurement system, introduce the elastic error of the ground, and reduce the accuracy of the measurement system; the pendulum type pendulum is often called the swing type pendulum, which swings like a swing when it is working, and its natural frequency is It is calculated according to the single pendulum formula, so it has a lower first-order natural frequency, and its sensitivity and measurement accuracy are higher than that of rigid supports; there is another elastic pendulum type pendulum, which is a modification of the pendulum type, with elastic components (that is, the spring leaf) replaces the radial arm of the pendulum pendulum. Its natural frequency is not only related to the length of the spring leaf, but also the elastic constant of the spring leaf and the weight of the rotor. Therefore, its sensitivity is higher than that of the pendulum pendulum. The frame is higher, and in order to make the first-order natural frequency of the elastic pendulum type frame have a lower value, the spring piece must be made very thin, so this type of frame can only bear a small lateral force and bias force, At the same time, due to the influence of the properties of the material itself, the spring sheet cannot be made infinitely thin, which limits the further improvement of its measurement accuracy

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