Speed sensor

By using a precision-machined housing and base, along with the application of high-temperature resistant ceramic piezoelectric crystals, the stability and accuracy issues of existing sensors in bearing vibration detection under megawatt-level nuclear power plant conditions have been resolved, achieving effective monitoring of high-frequency vibrations and improving sensor stability.

CN224137315UActive Publication Date: 2026-04-17CHINA TECHENERGY +1
0 Cites 0 Cited by

Patent Information

Application Number
CN202520927418.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-12
Publication Date
2026-04-17
Estimated Expiration
2035-05-12

AI Technical Summary

Technical Problem

Existing velocity sensors are unable to reliably and accurately acquire bearing vibration data under the special operating conditions of megawatt-class nuclear power plants, and cannot meet the actual needs of bearing vibration monitoring.

Method used

A speed sensor was designed, which uses a precision-machined housing that fits tightly with the base, combined with a high-temperature resistant ceramic piezoelectric crystal and epoxy resin filler to ensure high efficiency in vibration transmission and waterproof and dustproof performance of the sensor, thereby improving the stability and reliability of the sensor in harsh environments.

Benefits of technology

It enables effective detection of bearing vibration in high-frequency vibration environments, possesses excellent frequency characteristics and high sensitivity, enhances the performance and stability of the sensor, and is suitable for bearing vibration monitoring in megawatt-class nuclear power plants.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses a speed sensor which comprises a connector, a circuit board, a pre-tightening nut, a mass block, a piezoelectric ceramic crystal, a shell and a base. The bottom of the shell is connected with the base, and the top of the shell is hermetically connected with the connector; a stud is arranged at the center in the cavity of the shell, and a piezoelectric ceramic crystal is mounted on the stud; a mass block is pressed on the piezoelectric ceramic crystal; the piezoelectric ceramic crystal and the mass block are connected through the pre-tightening nut and the stud; a circuit board is mounted at the upper end in the cavity of the shell; the circuit board is connected with the piezoelectric ceramic crystal through a first wire. The circuit board is connected with the connector through a second wire. Epoxy resin glue is filled in a spare position in the shell. The shell and the base are tightly matched, so that the high efficiency of vibration transmission is ensured; the high-temperature-resistant ceramic piezoelectric crystal is combined, so that good frequency characteristic and high sensitivity are realized; the shell is in sealed connection with the connector, and the cavity is filled with epoxy resin glue, so that the reliability, waterproof performance and dustproof performance of the sensor are enhanced.
Need to check novelty before this filing date? Find Prior Art