The importance of rational selection of seal clearance of hydraulic slip ring

The hydraulic slip ring seal structure is an important and key part of the main bearing and fixed shell . The main bearing is connected with the external expansion and contraction cylinder , And rotate together . And fix the housing , As the name suggests, it is fixed . During the rotation of the main spindle of the hydraulic slip ring, it will grind with the fixed shell to form a fit gap . This clearance ensures that the main bearing and the housing are not in contact during operation , There is only friction of hydraulic medium . therefore , The wear degree of the contact surface between the two will not be too serious , Thus, the problem of frequent seal failure of hydraulic slip ring is avoided .

therefore , The sealing effect of the hydraulic slip ring depends on the clearance between the mandrel and the housing . actually , Gap sealing is actually a simple and widely used sealing method . It relies on the small gap between the mating surfaces of relatively moving parts to prevent leakage . The hydraulic medium fluid in the hydraulic slip ring cavity fills its gap , Rely on the adsorption of metal and oil and the viscosity of oil to produce liquid throttling resistance effect and limit the leakage . A certain amount of small clearance can form a liquid friction state between the hydraulic slip ring mandrel and the fixed shell , The friction coefficient is greatly reduced 、 Reduce energy consumption .

Mofuron technology hydraulic slip ring has high requirements for sealing effect , But in its actual operation , There will also be a certain amount of hydraulic medium fluid leakage and some pressure loss . Mainly to cool the rotating part of the hydraulic slip ring , Reduce the heat generated by friction between bearings , Avoid locking the contact surface between the main bearing and the fixed housing . Therefore, the selection of sealing clearance of hydraulic slip ring needs to be reasonable . When the sealing clearance is too large , The leakage will increase , Not only can't meet the actual work requirements , It will also seriously pollute the environment . When the seal clearance is too small , The hydraulic slip ring will not rotate , Normal work .