“The support wheel is an important bearing load of crawler construction machinery, which is composed of the support wheel body, the support shaft, the left and right support seat and the floating oil seal. The support shaft is fixed on the trolley frame through the support seat, and the axle sleeve is pressed into the hole in the wheel body to rotate with the support shaft. The sealing assembly is a floating oil seal between the rotating wheel body and the fixed left and right support seat, so as to maintain the lubricating oil seal of the support shaft and the sleeve.”
The support wheel is an important bearing load of crawler construction machinery, which is composed of the support wheel body, support shaft, left and right support seat and floating oil seal. The support shaft is fixed on the trolley frame through the support seat. At the same time, there is a pressing sleeve in the hole of the wheel body to rotate with the support shaft. The sealing assembly is a floating oil seal between the rotating wheel body and the fixed left and right support seat, so as to keep the lubricating oil seal of the support shaft and the sleeve and other parts.
When the floating oil seal is installed, the rubber ring is respectively installed in the sealing seat mouth of the wheel body and the support seat. Because the sealing ring bears the extrusion of the rubber ring, the tight meshing of the sealing ring in the rotation is ensured. When the floating oil seal is installed incorrectly, the following situations will occur: in the static position, the gas tight detection pressure may not reach the equivalent value due to the elastic action of the rubber ring, and there is no way to detect it, and immediate leakage may not occur after oil injection. However, after running for a period of time, when the friction of each component is heated up and the pressure in the cavity rises to a certain value, the axial fitting force Z of the bright belt at this point is small due to the elastic force of the rubber ring at the rotating mesh, resulting in intermittent instantaneous leakage. If the rotation is stopped in this case, the leakage at the mesh is not instantaneous, but a serious oil leak occurs, and continues until the pressure of the inner cavity drops to a certain value and the elasticity of the rubber ring reaches a new balance. In addition, when the assembly is wrong, the operation may also occur in the local edge surface pressure is too large, the friction and wear is intensified, the excessive heat is generated, the lubricating oil viscosity is reduced, and the wear of various parts is aggravated. Therefore, reasonable assembly is very important for the use of floating oil seals in excavator support wheels.
Post time: Sep-28-2023
