sae hydraulic fittings common errors and root cause analysis

However, the hydraulic hose concrete pumps, excavators, loaders and other construction machinery part, it is often not leak, crack, broken, loose assessment is often no trouble, just replace the hose, quickly reuse the same mistake. Hydraulic hose loose or broken, is not only a waste of oil, polluting the environment, but also on the efficiency, or even an accident, endanger personal safety. Hydraulic hose failure, analyze the causes: improper use of the system design is unreasonable, pipe manufacturing substandard. First, the analysis of the performance of the tube. Hose rubber hose, high pressure hose, low pressure hose high pressure hose is generally divided into rubber hoses and plastic pipes plastic pipe is cheap, easy to install, but the low carrying capacity, easy to aging, only return or consumption scattering of the intermediate rubber layer The outer and inner steel wire reinforcing layer consists of four parts. Control of the hydraulic fluid in direct contact with the inner layer of synthetic rubber. Hose capacity depends on the strengthening layer on layer, skeleton hose, steel wire braided or woven usually. Most of the high-pressure steel wire braid bones, high-pressure, high-pressure steel wire spiral skeleton. The case of normal wear and tear resistance, good corrosion resistance and production of rubber, to ensure that the reinforcing layer is generally used for mechanical damage, corrosion resistance, humidity resistance, corrosion resistance, low pressure hoses fiber cotton mesh tube holders return. The outer layer fails, the failure of the inner layer and enhancement layer fault rupture failure mouth: hose failure is usually expressed in the following four aspects. The reasons for the failure of hydraulic hoses and hose looks like this: the outer layer (1) failed, mainly due to the bend hoses crack crack appearance in a cold environment. If the hose is observed to crack is generated if the cracks in the plastic tube in order to determine whether or not directly replace the hose. Not free to move in a cold environment, the hydraulic system hose or overhaul customer in the room, when needed. If you need long-term work in a cold environment, should be replaced with a cold hose.sae hydraulic fittings
 (2) the outer surface of the outer surface of the pipe or improper use of work equipment foam rubber hose hose production of poor quality. When the formation of air bubbles should be in the middle, hose production quality problems, the timely exchange of qualified hose; bubble formation in the tubing joints, it may be common due to improper installation. Detachable hose port number is usually detained two. Hexagonal core detachable connectors and connector jacket often remove the hose crimping connector is connected to the outer delete a common set of core components, and then refused for the compression of special equipment, piping. (3) hose there is no breakthrough, but a large number of oil spills hose, but did not score massive oil spill plastic tube high-pressure jet erosion, abrasion, a large area of ​​the layer wires leak led to a lot of oil spills. This error usually occurs on the elbows, you should check and replace the hose, the hose in order to meet the technical requirements to ensure that the bending radius. Layer (4) of the outer tube, the surface micro-crack pipe natural science is aging and deterioration. Degradation due to aging, a further external surface of the covering layer thickens ozone With the passage of time, the hose, as long as it is in use, has a slight bend to produce microcracks. In this case, replace the hose.high pressure hydraulic fittings