Research on Temperature Adaptability of Special Hydraulic Buffer Cylinders

During the research on vibration reduction and noise reduction of underwater weapons, it was found that the special buffer hydraulic cylinders, as an important transmission component, is one of the main sources of noise. Therefore, the design of the buffer device for the special oil cylinder is particularly important, and the prediction of the buffer effect is the core issue of buffer design. Due to the special working conditions of the special buffer hydraulic cylinders, it is mostly in standby mode. When a startup is started after a long interval, the hydraulic oil temperature in the buffer chamber is equal to the installation environment temperature. There will be a large temperature difference in the hydraulic oil in the buffer chamber between the first startup and subsequent startups. In order to ensure that the working requirements can be met even under extreme temperature conditions, temperature adaptability research needs to be conducted on the special buffer hydraulic cylinders. Firstly, a mathematical model of the motion process of a special oil cylinder was established. Under extreme oil temperature conditions of 10 ± 2 ℃, 40 ± 2 ℃, and fuel supply pressure of 7.5 ± 0.2, the flow field was numerically simulated using Fluent. Then, temperature adaptability tests were conducted in a large temperature box, and the full stroke motion time and vibration acceleration level parameters of the special buffer hydraulic cylinders were tested under two extreme temperature conditions. Finally, it was found through comparison that the experimental results were similar to the theoretical analysis and met the corresponding indicator requirements, which can provide reference for the design and vibration reduction and noise reduction work of special buffer cylinders in the future.