A Calculation Method for Static Balance of Hydrostatic Sliding Seat Considering Fluid-Structure Interaction
A fluid-solid coupling and calculation method technology, applied in design optimization/simulation, geometric CAD, special data processing applications, etc., can solve problems such as changes in oil film thickness of hydrostatic oil pads, affecting bearing force, etc.
Active Publication Date: 2020-05-22
BEIJING UNIV OF TECH
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Problems solved by technology
Due to the deformation of the static pressure slide seat at the static pressure guide rail, the thickness of the oil film of the static pressure oil pad will change, thereby affecting the supporting force
Method used
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[0012] The following is attached figure 1 and 2 The present invention is described in further detail.
[0013] Step (1) Mesh division
[0014] According to the requirement of calculation accuracy, the hydrostatic sliding seat is meshed to obtain i*j calculation nodes. Among them, i is the number of nodes divided in the x direction of the static pressure slide, and j is the number of nodes divided in the y direction of the static pressure slide. Initially given the initial oil film thickness and sliding seat inclination.
[0015] Step (2) Check the oil film thickness and sliding seat, and calculate the actual oil film thickness and sliding seat inclination.
[0016] The oil pad pressure distribution is calculated according to the initial sliding seat inclination angle and oil film thickness. The hydrostatic oil film conforms to the film lubrication theory, based on the basic assumption of the Reynolds equation: the fluid does not slide on the interface, that is, the fluid ...
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The invention discloses a rectangular static-pressure oil cushion quick calculation method taking fluid-structure interaction into consideration, and particularly relates to a rectangular bearing capacity quick calculation method taking interaction effect of static-pressure oil cushion guide surface deformation and oil cushion pressure distribution into consideration. The method comprises the steps that firstly grid partition is conducted, and standard deformation of a guide surface is calculated and stored; secondly, oil film pressure distribution is obtained according to mutual iteration of a Reynolds equation and a deformation equation; finally, the oil film bearing capacity is obtained by integrating. The method has the advantages of in the process that the static-pressure oil film bearing capacity is calculated, the impact of fluid-structure interaction to the bearing capacity is taken into full consideration. Moreover, a guide surface deformation quick calculation method is provided, it is not required that double integral is calculated once every time when the guide surface deformation is calculated, and the design efficiency is greatly improved.
Description
technical field [0001] The invention belongs to the field of design and analysis of the static pressure system of a heavy-duty numerical control machine tool, and designs a static balance calculation method of a static pressure slide seat considering fluid-solid coupling, more specifically, a static pressure oil pad and a guide rail surface at the static pressure slide seat are considered A static equilibrium calculation method for fluid-solid coupling characteristics between deformations. Background technique [0002] The static pressure slide seat is widely used in the movable heavy-duty CNC machine tools of the gantry. It is arranged between the machine bed and the gantry frame. The gantry frame is fixed on the static pressure slide seat. The static pressure slide seat and the bed pass through two A column of hydrostatic guide rails is connected to the bed. The static pressure slide supports the gantry frame, and its static characteristics play a vital role in the machin...
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IPC IPC(8): G06F30/23G06F30/17
CPCG06F30/17G06F30/23
Inventor 赵永胜方翠刘志峰蔡力钢程强
Owner BEIJING UNIV OF TECH