US 11,719,595 B2
Testing device and testing system for high-pressure and large-scale gap dynamic sealing performance
Yinshui Liu, Hubei (CN); Shendan Zhao, Hubei (CN); Defa Wu, Hubei (CN); Hao Pang, Hubei (CN); and Yipan Deng, Hubei (CN)
Assigned to HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Filed by HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Filed on Nov. 29, 2021, as Appl. No. 17/537,448.
Claims priority of application No. 202011366612.4 (CN), filed on Nov. 30, 2020.
Prior Publication US 2022/0170811 A1, Jun. 2, 2022
Int. Cl. G01M 3/28 (2006.01); G01M 3/26 (2006.01); F04B 51/00 (2006.01)
CPC G01M 3/26 (2013.01) [F04B 51/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A testing device for testing high-pressure and large-scale gap dynamic sealing performance of a plunger sleeve, the testing device comprising two cylinders, a first plunger rod, a second plunger rod and a piston rod, wherein
the first plunger rod and the second plunger rod are symmetrically distributed on both sides of the piston rod, a first chamber is formed between an end of the first plunger rod and a first cylinder, a second chamber is formed between an end of the second plunger rod and a second cylinder, high-pressure liquid is provided in the first chamber and the second chamber, and the first chamber communicates with the second chamber through a through-flow pipeline,
the piston rod is connected to the first plunger rod and the second plunger rod, the piston rod drives the first plunger rod and the second plunger rod to reciprocate when being driven by a driving device,
the plunger sleeve and a locking plunger sleeve are disposed outside each of the first plunger rod and the second plunger rod, the locking plunger sleeve is provided with a leakage port, and
when the first plunger rod and the second plunger rod reciprocate, the high-pressure liquid in the first chamber and the second chamber flows into the leakage port respectively through a gap between the first plunger rod and the plunger sleeve and through a gap between the second plunger rod and the plunger sleeve, and an amount of the high-pressure liquid leaking from the leakage port is measured to test sealing performance of the plunger sleeve.