We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
液压支架双级安全阀设计及其快速动载冲击试验研究.
- Authors
周国强; 王慧; 宋宇宁; 赵国超
- Abstract
In order to improve the impact resistance and stability of the hydraulic supports, a new type of double-stage safety valve combined with a first-stage direct-acting valve with rated flow and pressure of 50 L/min and 45 MPa respectively and a second-stage differential valve with rated flow and pressure of 1000 L/min and 50 MPa respectively was designed. Moreover, a rapid dynamic load impact test system was developed based on the accumulator group, and the pressure dynamic response characteristics of the rapid dynamic load impact test system and the pressure-flow dynamic response characteristics of the double-stage safety valve were obtained by using AMESim and Simulink combined-simulation technology. Finally, a rapid dynamic load impact test bench prototype was established to test the double-stage safety valves. The results show that the rated pressure and flow rate of the second-stage differential valve are about 49.2 MPa and 992 L/min respectively, the opening time is less than 3 ms, the pressure stabilization time is within 1315 ms, and the unloading time is less than 5 ms. The experiments verify that the designed double-stage safety valve has the characteristics of fast unloading speed and excellent impact resistance and the correctness of the rapid dynamic load impact test scheme.
- Subjects
RELIEF valves; IMPACT testing; IMPACT loads; TEST systems; DYNAMIC pressure; DYNAMIC loads
- Publication
China Mechanical Engineering, 2023, Vol 34, Issue 18, p2194
- ISSN
1004-132X
- Publication type
Article
- DOI
10.3969/j.issn.1004-132X.2023.18.006