Temperature Field Analysis of Hydrostatic Bearing for Guide Sleeve of High-Speed Hydraulic Cylinder
The high-speed hydraulic cylinder is the executive component of the electro-hydraulic servo control system.The hydro-static bearing structure of its guide sleeve has excellent guiding performance,anti-eccentric load and low friction,which can greatly af-fect the control accuracy and dynamic and static performance of the system.Through theoretical analysis,it was found that the tempera-ture change of hydrostatic bearing oil film could be caused under different working conditions,and the temperature change had a great influence on the bearing capacity of hydrostatic bearing.Fluent was used to model and simulate the temperature field of the hydrostatic bearing at the piston rod guide sleeve of the hydraulic cylinder,and the relationships were analyzed between the eccentricity of the pis-ton rod,the inlet flow rate,the moving speed of the piston rod and the oil film temperature,as well as the relationship between the oil film temperature rise and the oil film bearing capacity.The results show that with the increase of eccentricity,the temperature rise of the axial oil sealing surface is larger and larger,and the proportion of the area with a large temperature rise increases;the inlet flow rate is proportional to the temperature rise;the reciprocating linear motion of the piston rod drives the hydraulic oil movement,and the oil film produces the temperature rise.At the same time,the temperature rise of the oil film leads to the reduction of the oil film supporting force and the hydrostatic pressure supporting performance of the guide sleeve.
high speed hydraulic cylinderhydrostatic bearingbearing capacitytemperature field
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