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CN-224216720-U - Metering device for measuring rotating speed of liquid metal sliding bearing

CN224216720UCN 224216720 UCN224216720 UCN 224216720UCN-224216720-U

Abstract

The application relates to the technical field of nondestructive testing, and discloses a metering device for measuring the rotating speed of a liquid metal sliding bearing, which comprises a driving motor, a shaft to be tested, the liquid metal sliding bearing, an acoustic emission sensor, a signal collector, a photoelectric rotating speed sensor and a monitoring computer, wherein the driving motor is in transmission fit with the shaft to be tested; the shaft to be measured is arranged on the liquid metal sliding bearing, the acoustic emission sensor is arranged on the outer side of the liquid metal sliding bearing, the signal collector is electrically connected with the acoustic emission sensor, the signal collector is electrically connected with the photoelectric rotating speed sensor, and the signal collector is electrically connected with the monitoring machine. The application has the effect of facilitating measurement and verification of the rotating speed of the liquid metal sliding bearing.

Inventors

  • SONG HAONAN
  • XU PENG
  • Ni Lianghai

Assignees

  • 无锡赛棱科技有限公司

Dates

Publication Date
20260508
Application Date
20250718

Claims (4)

  1. 1. A metering device for measuring the rotating speed of a liquid metal sliding bearing is characterized by comprising a driving motor, a shaft to be measured, the liquid metal sliding bearing, an acoustic emission sensor, a signal collector, a photoelectric rotating speed sensor and a monitoring computer, wherein, The driving motor is in transmission fit with the shaft to be tested; The shaft to be tested is arranged on the liquid metal sliding bearing; the acoustic emission sensor is arranged on the outer side of the liquid metal sliding bearing; the signal collector is electrically connected with the acoustic emission sensor; the signal collector is electrically connected with the photoelectric rotating speed sensor; the signal collector is electrically connected with the monitoring computer.
  2. 2. A metering device for measuring the rotational speed of a liquid metal plain bearing according to claim 1, characterized in that: the driving motor is in transmission fit with the shaft to be tested through a coupler.
  3. 3. A metering device for measuring the rotational speed of a liquid metal plain bearing according to claim 1, characterized in that: the shaft to be measured is provided with a reflective mark; The photoelectric rotating speed sensor emits infrared rays to the reflective marks of the shaft to be detected and receives the reflected infrared rays.
  4. 4. A metering device for measuring the rotational speed of a liquid metal plain bearing according to claim 1, characterized in that: the driving motor is a variable frequency motor.

Description

Metering device for measuring rotating speed of liquid metal sliding bearing Technical Field The application relates to the technical field of nondestructive testing, in particular to a metering device for measuring the rotating speed of a liquid metal sliding bearing. Background The sliding bearing is used as a key supporting component in the rotary machine, and the application range of the sliding bearing is continuously expanded along with the development of industrial technology. In order to meet the requirements of high-end equipment such as aerospace, high-speed motors, precision machine tools and the like on high-speed and high-reliability support, sliding bearings are developing towards higher speeds and longer service lives. However, under the high-speed working condition, the traditional oil lubrication sliding bearing is easy to cause excessive temperature rise and abrasion aggravation and even failure of the bearing due to severe shearing and heating of the lubricant and insufficient heat dissipation capability, and further improvement of the performance of the bearing is severely restricted. In order to overcome the above-mentioned bottleneck, in recent years, a new type of sliding bearing using liquid metal (such as gallium-based alloy) as a lubricating medium has been developed. The liquid metal has excellent heat conductivity, low vapor pressure and good lubricating performance, can obviously improve the heat dissipation efficiency and the bearing capacity of the bearing, and becomes an important development direction of the high-speed sliding bearing technology. However, the particular physicochemical properties of liquid metals (e.g., conductivity, corrosiveness, high temperature reactivity, etc.) also place greater demands on the monitoring and control of bearing systems. The rotating speed is used as one of key parameters reflecting the running state of the bearing, and the accurate measurement of the rotating speed has important significance for guaranteeing the safety of equipment and optimizing the running performance. The noise analysis method is one of the rotational speed measurement methods, and vibration acoustic signals are collected through an acoustic emission sensor, but when the rotational speed is measured through the noise analysis method, because an indirect measurement method is adopted, whether the result of measuring the rotational speed is accurate or not is difficult to judge, and before the equipment for measuring the rotational speed through the noise analysis method is used, the measurement accuracy of the rotational speed needs to be verified. Disclosure of utility model In order to facilitate measurement and verification of the rotating speed of the liquid metal sliding bearing, the application provides a metering device for measuring the rotating speed of the liquid metal sliding bearing. The application provides a metering device for measuring the rotating speed of a liquid metal sliding bearing, which adopts the following technical scheme: The metering device for measuring the rotating speed of the liquid metal sliding bearing comprises a driving motor, a shaft to be measured, the liquid metal sliding bearing, an acoustic emission sensor, a signal collector, a photoelectric rotating speed sensor and a monitoring computer, wherein, The driving motor is in transmission fit with the shaft to be tested; The shaft to be tested is arranged on the liquid metal sliding bearing; the acoustic emission sensor is arranged on the outer side of the liquid metal sliding bearing; the signal collector is electrically connected with the acoustic emission sensor; the signal collector is electrically connected with the photoelectric rotating speed sensor; the signal collector is electrically connected with the monitoring computer. Optionally, the driving motor is in transmission fit with the shaft to be tested through a coupler. Optionally, the shaft to be tested is provided with a reflective mark; The photoelectric rotating speed sensor emits infrared rays to the reflective marks of the shaft to be detected and receives the reflected infrared rays. Optionally, the driving motor is a variable frequency motor. In summary, the present application includes at least one of the following beneficial technical effects: 1. By adopting two measurement modes of the acoustic emission sensor and the photoelectric rotating speed sensor and comparing and verifying the measurement results of the acoustic emission sensor and the photoelectric rotating speed sensor, the problem that a single sensor may have errors or failures under the complex working condition of liquid metal is effectively avoided, and the accuracy of rotating speed measurement and the reliability of a system are obviously improved; 2. The acoustic emission sensor adopts a non-contact acquisition mode, does not need to be in direct contact with a liquid metal sliding bearing, avoids the interference of a bearing carrier state,