Hose couplings can be used in hydraulic systems, but the appropriate type needs to be selected according to specific operating conditions. Hydraulic systems have extremely high requirements for sealing, pressure resistance, and vibration resistance, and hose couplings need to meet these conditions in order to operate stably. For example, the sleeve type coupling is sealed by the metal sleeve biting the pipe wall, which is suitable for medium and high pressure scenarios; Expansion type couplings rely on the expansion and deformation of the pipe opening to seal, and are commonly used in low-pressure conditions; The buckle type coupling compresses the coupling and hose into one through hydraulic tools, which can withstand high-pressure pulses and is the most common choice in hydraulic systems.
In practical applications, the material of hose couplings needs to be compatible with hydraulic oil (such as nitrile rubber, fluororubber), the working temperature range needs to cover the operating environment of the system (commonly -40 ℃ to 120 ℃), and the anti vibration ability needs to match the operating frequency of the equipment (such as construction machinery that needs to withstand frequent impacts). For example, the hydraulic system of excavators often uses a combination of double-layer steel wire braided hoses and compression couplings, which can withstand a pressure of 35MPa and resist the severe vibration of the rotating mechanism.
If selected improperly, it may lead to seal failure (such as O-ring aging), coupling loosening (such as vibration causing sleeve displacement), or hose rupture (such as insufficient pressure resistance). Therefore, it is necessary to match according to system pressure, medium type, temperature range, vibration frequency and other parameters, combined with coupling specifications (such as nominal diameter, connection thread) and hose parameters (such as inner diameter, wall thickness). If necessary, pressure testing should be conducted to verify reliability.