Views: 206 Author: Site Editor Publish Time: 2020-12-06 Origin: Site
In the main hydraulic system of construction machinery, the design of hydraulic adapter fittings is very important for the normal operation of the whole hydraulic system. Improper design and selection will result in pipeline leakage and environmental pollution.
Sealing device is the most basic and important device to ensure the normal operation of hydraulic and pneumatic system, which is mainly used to prevent the leakage of liquid or gas. Good sealing ensures that the hydraulic transmission system can transmit power and work properly. If the seal is not good, the leakage of system and components will be increased, the pressure and volumetric efficiency of the system will be reduced, and the energy will be lost. In serious cases, the oil leakage of the hydraulic system will pollute the environment. Therefore, it is very important to properly design the sealing form of the pipes and fittings and oil ports of the hydraulic system.
The outer threaded joint is sealed with O-ring in the form that the O-ring is compressed and deformed when it is installed in the hydraulic pipe joints body and chamfered 15 degrees into the oil port through assembly. When designing the O-ring seal joint and port, the fitting of surface countersunk hole, internal chamfer size and thread depth is very important.
The general principle of O-ring seal is that when O-ring hydraulic fittings is installed in the sealing groove, its section is compressed and then deformed. In the absence of pressure, the elasticity of the O-ring hydraulic fittings generates pre-contact pressure on the contact surface to achieve initial sealing. When the sealing chamber is filled with pressurized working medium, under the pressure, the O-ring is squeezed to the side of the groove, and the contact pressure on the sealing surface rises, thus improving the sealing effect.
The seal of the hydraulic pipe joint and the design of the oil port are very important to the hydraulic transmission system of the whole machine. In the process of design, it is necessary to know the working conditions of different main engine products at first, and then to determine whether the dynamic seal or static seal is at the connection between pipe joint and oil pipe adapter according to the sealing condition required by the system. In addition, the requirements of sealing device should be fully considered and the qualified seal should be selected according to the nature of oil medium and working temperature. And choose and design matching types of pipe fittings, in which the size of port and joint mating surface is the key point.
JAZZY was founded in 2005 as a company specialized in the designing and manufacturing of superior high-quality Hydraulic Transmission System and Pneumatic Transmission System. Our products are widely used in power construction, metallurgical construction, petrochemical construction, marine engineering, aerospace, military engineering and other fields. As for hydraulic pipe joints, hydraulic hose fitting and stainless steel hydraulic fittings are also available in JAZZY. We are looking for business partners and sincerely look forward to your participation.
