Thrust plate, thrust plate design method and aerostatic bearing
A technology of aerostatic bearing and design method, which is applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problems of enlarged air film gap and reduced spindle performance, and achieves simple operation, reliable results and high efficiency. Effect
Active Publication Date: 2019-09-24
JIANGSU JITRI JINGKAI HIGH VALUE MFG CO LTD
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Problems solved by technology
[0005]
The technical problem to be solved by the present invention is to provide an aerostatic bearing thrust plate and a design method to solve the problem that in the aerostatic thrust bearing, the air film gap becomes larger due to the deformation of the thrust plate caused by the air film pressure. This leads to the problem of degraded spindle performance
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[0023] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] Such as figure 1 Shown is a design method of an aerostatic bearing thrust plate, the steps of the method are,
[0025] S1. Using the principle of fluid mechanics, calculate the pressure distribution of the air film on the thrust plate according to the ideal air film thickness; There is no displacement under the action of air film pressure, and then according to the structural size of the aerostatic bearing, the finite element method is used to divide the finite element mesh, and then the same finite element method as the aerostatic bearing is used for the structural size of the thrust plate The grid is divided, and finally the gas film pressure distribution acting on the thrust plate is calculated according to the principle of flow balance.
[0026] S2. According to the distribution of the gas film pressure in step S1, the gas film pressure is given to the n...
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The invention relates to a design method of an aerostatic bearing thrust plate, which comprises the following steps of: S1, calculating air film pressure distribution on the thrust plate according to an ideal air film thickness; s2, according to the gas film pressure distribution in the step S1, calculating and obtaining the deformation of the thrust plate caused by the influence of the gas film pressure; s3, correspondingly compensating the deformation to the thickness of the thrust plate; s4, calculating the actual air film thickness of the compensated thrust plate under the action of the air film pressure; and S5, judging the deviation between the actual air film thickness and the ideal air film thickness, and if the deviation is large, continuously executing the steps S2 to S5 until the actual air film thickness is close to the ideal gas film thickness. Based on the fluid mechanics, fluid-solid coupling principle and finite element simulation method, through the mode of compensating the thickness of the air film, the ideal rigidity and bearing capacity of the aerostatic bearing are ensured while the light weight of the thrust plate is ensured, and the dynamic performance optimization of the aerostatic bearing is also ensured.
Description
technical field [0001] The invention relates to the technical field of ultra-precision movement and ultra-precision measurement, in particular to a thrust plate, a design method of the thrust plate and an aerostatic bearing. Background technique [0002] With the vigorous development of my country's national defense industry, aerospace and electronic technology and other cutting-edge technologies, the requirements for the accuracy of ultra-precision machining and ultra-precision measuring equipment are becoming more and more stringent. The development of ultra-precision machining and testing technology has become an important development direction of today's machinery industry. [0003] In ultra-precision machining and testing equipment, extremely high requirements are placed on the high speed and high motion accuracy of moving parts. Compared with traditional liquid lubricating oil film bearings, air static pressure bearings use air as a lubricating medium, and there is no...
Claims
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/17G06F2119/06Y02T90/00
Inventor 滕翔宇霍德鸿丁辉
Owner JIANGSU JITRI JINGKAI HIGH VALUE MFG CO LTD