Integrated rotation-vibration sensing assembly and digital vibration sensor with rotation speed signal

Abstract

The invention discloses an integrated rotation-vibration sensing assembly, which is used for measuring vibration information of at least one rotating device. The rotating device is provided with at least one rotating shaft, and the integrated rotation-vibration sensing assembly comprises at least one rotation detection device for detecting the rotating speed of the rotating shaft, converting the rotating speed into rotating information and outputting the rotating information; a vibration measuring device used for outputting vibration information; and at least one processing device, used for receiving the rotation information and determining a vibration basic frequency band according to the rotation information so as to filter the vibration information and output measurement information corresponding to the vibration basic frequency band. In addition, the invention also discloses a digital vibration sensor with a rotating speed signal.

Description

technical field [0001] The invention relates to an integrated rotation-vibration sensing component, in particular to an integrated rotation-vibration sensing component of a digital vibration sensor with a rotation speed signal. Background technique [0002] Any equipment with a rotor or shaft that rotates around a certain axis can be called a rotating equipment, ranging from fans, motors, pumps, and compressors commonly found in factories to wind turbine shafts and high-speed high-speed Gearboxes and axles for railway trains. The rotor or shaft of any rotating equipment cannot be in a perfect true circle state. The rotor or shaft of some rotating equipment is even gradually skewed and deformed due to long-term load, so there will be different degrees of eccentric rotation during operation, resulting in some The reciprocating force will cause the rotor or shaft of the rotating equipment to vibrate and make its material fatigued and aged. Broken rotor or shaft. Therefore, t...

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Problems solved by technology

[0005] However, if Figure 8 As shown, even if the above-mentioned high-end equipment is equipped with a tachometer, it is not used to detect vibration, but only output the motor speed data for the operator's reference

On the other hand, the part of vibration detection is simply to install a vibrating meter on the machine table to detect the vibration data of the above-mentioned equipment, and then the processor analyzes the original measurement value obtained by the vibration measurement, because the machine itself The vibration is not limited to the vibration of the rotating shaft, there are often vibrations from other machines, and vibrations caused during the transmission process, especially all vibrations may produce double or triple frequency resonance, measured by the vibration meter Therefore, the measured vibration information is mixed with many irrelevant components, and the amount of original vibration data becomes very large and messy

[0006] Further, because of the influence of the location where the vibrating meter is set, such as being located near the pulley set, the vibrating meter is affected by the amplitude of the vibration of the pulley set, which may be more obvious than the amplitude of the shaft of the main drive motor. The interference of this type of noise will make the signal-to-noise ratio (S / N ratio) becomes degraded and the final calculation result is distorted, the motor shaft amplitude to be measured is ignored instead, and the real vibration eccentricity cannot be accurately known; in addition, in a highly automated factory, a production line will be Setting up multiple machines requires real-time vibration monitoring of a large number of machines, and the amount of uploaded vibration information constitutes a huge burden on information transmission and computing processing. It is necessary to set up expensive high-speed transmission networks and select servers or workstations with powerful computing capabilities. May achieve the purpose of real-time vibration monitoring

[0007] Especially for complex equipment such as electric vehicles, there will be more than one source of vibration. From the motor to the reduction gear set and the transmission shaft, each will generate vibrations of different frequencies. There is a difference between distance and nearness. If you want to measure multiple vibration sources with a single vibration meter, the vibration with a short distance or a large amplitude will cover up a vibration with a long distance or a small amplitude. However, the covered vibration may have reached a critical point, which will inevitably cause considerable risk

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