Patents by Inventor Qiuping Yu

Qiuping Yu 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).

  • Device for testing mechanical seal performance
    Patent number: 9631990
    Abstract: A device for testing mechanical seal performance includes a main shaft (4), a working chamber (18) with two end covers (6, 13) respectively located at two ends thereof, and two groups of mechanical seals to be tested (7); wherein a shaft sleeve (5) and the main shaft (4) form a clearance fit and penetrate through the end covers (6, 13) at two ends of the working chamber (18) together; the shaft sleeve (5) extends outside U-shaped openings (23) which are arranged at two ends of the end covers (6, 13) and arranged on the same generatrix; driven pins (15) are arranged on the locations of the main shaft (4) corresponding to the U-shaped openings (23); the middle part of the shaft sleeve (5) is provided with two segments of threads having the same thread pitch and opposite rotating directions.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: April 25, 2017
    Assignee: NANJING FORESTRY UNIVERSITY
    Inventors: Jianjun Sun, Qiaoan Tu, Qiong Hu, Chenbo Ma, Qiuping Yu, Min Zhou
  • Device for testing mechanical seal performance
    Publication number: 20160146681
    Abstract: A device for testing mechanical seal performance includes a main shaft (4), a working chamber (18) with two end covers (6, 13) respectively located at two ends thereof, and two groups of mechanical seals to be tested (7); wherein a shaft sleeve (5) and the main shaft (4) form a clearance fit and penetrate through the end covers (6, 13) at two ends of the working chamber (18) together; the shaft sleeve (5) extends outside U-shaped openings (23) which are arranged at two ends of the end covers (6, 13) and arranged on the same generatrix; driven pins (15) are arranged on the locations of the main shaft (4) corresponding to the U-shaped openings (23); the middle part of the shaft sleeve (5) is provided with two segments of threads having the same thread pitch and opposite rotating directions.
    Type: Application
    Filed: December 27, 2013
    Publication date: May 26, 2016
    Inventors: Jianjun Sun, Qiaoan Tu, Qiong Hu, Chenbo Ma, Qiuping Yu, Min Zhou