Patents by Inventor Jichong Liang

Jichong Liang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and device for evaluating long-term operation of transformer oil pump
    Patent number: 11674519
    Abstract: A device and method for evaluating long-term operation of a transformer oil pump. An inlet of an oil pump is connected to an outlet of an oil tank through an oil pipe, and an outlet of the oil pump is connected to an inlet of the oil tank through an oil pipe. A pressure gauge is provided on the oil pipe to the inlet and the outlet of the oil pump, respectively. An ultra-high-frequency (UHF) sensor is provided on an inner wall of an oil pipe close to the oil pump. A pressure difference between the oil pipes to the inlet and to the outlet of the oil pump is monitored. A three-phase unbalanced current of a stator winding is monitored. The vibration of the oil pump is monitored. The rotor-to-stator rub is monitored. Based on the above inspection, a long-term health status of the oil pump is determined.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: June 13, 2023
    Assignee: STATE GRID SHANXI ELECTRIC POWER RESEARCH INSTITUTE
    Inventors: Hua Yu, Guodong Li, Wei Wang, Hong Liu, Guangqi Mu, Aimin Wang, Tao Jin, Jichong Liang, Haipeng Wang, Yansong Li, Hai Zhang, Zhumao Lu, Lu Bai, Shan Lu, Yanchun Li, Xinwei Wang
  • METHOD AND DEVICE FOR EVALUATING LONG-TERM OPERATION OF TRANSFORMER OIL PUMP
    Publication number: 20210262474
    Abstract: A device and method for evaluating long-term operation of a transformer oil pump. An inlet of an oil pump is connected to an outlet of an oil tank through an oil pipe, and an outlet of the oil pump is connected to an inlet of the oil tank through an oil pipe. A pressure gauge is provided on the oil pipe to the inlet and the outlet of the oil pump, respectively. An ultra-high-frequency (UHF) sensor is provided on an inner wall of an oil pipe close to the oil pump. A pressure difference between the oil pipes to the inlet and to the outlet of the oil pump is monitored. A three-phase unbalanced current of a stator winding is monitored. The vibration of the oil pump is monitored. The rotor-to-stator rub is monitored. Based on the above inspection, a long-term health status of the oil pump is determined.
    Type: Application
    Filed: August 14, 2020
    Publication date: August 26, 2021
    Applicant: STATE GRID SHANXI ELECTRIC POWER RESEARCH INSTITUTE
    Inventors: Hua Yu, Guodong Li, Wei Wang, Hong Liu, Guangqi Mu, Aimin Wang, Tao Jin, Jichong Liang, Haipeng Wang, Yansong Li, Hai Zhang, Zhumao Lu, Lu Bai, Shan Lu, Yanchun Li, Xinwei Wang