Air flotation assembly for large-scale precise rotary table

Abstract

The invention discloses an air flotation assembly for a large-scale precise rotary table. The air flotation assembly comprises an air floatation support and an air flotation shaft sleeve which is sleeved on the air flotation support, wherein the air floatation support comprises a vertical barrel and a bearing base arranged at the bottom of the vertical barrel; the air flotation shaft sleeve comprises a base and a shaft drum arranged on the base; the shaft drum is sleeved outside the vertical barrel; the base is arranged on the bearing base; an air outlet hole of which the inner part and the outer part are communicated with each other is formed on the top surface of the bearing base and the wall of the vertical barrel; an air inlet hole of which the inner part and the outer part are communicated with each other is formed on the bearing base; and the air outlet hole is communicated with the air inlet hole. When the air flotation assembly is used, high-pressure gas is introduced from the air inlet hole and is exhausted from the air outlet hole, and a layer of rigid air membrane is formed between the air flotation support and the air flotation sleeve, so that large-scale heavy objects are borne by the air flotation shaft sleeve, the no-friction or small-friction rotation of the air flotation shaft sleeve relative to the air flotation support can be realized, the rotation eccentricity of the air flotation sleeve is avoided, and the borne objects can be stably rotated.

Description

technical field [0001] The invention relates to an accessory device of a large turntable, in particular to an air bearing component of a large precision turntable capable of carrying large heavy objects and maintaining stable rotation. Background technique [0002] Turntable equipment has been widely used in the manufacturing industry, such as CNC hydraulic turntable and so on. Among the turntable equipment, the one that can carry large and heavy objects is a large turntable. [0003] In the existing large-scale turntables, simple mechanical devices are often used as the rotating devices, such as bearing connection devices. These traditional rotating devices have no problem when carrying a small workpiece weight, but when carrying large heavy objects, this device is prone to failure , such as: because the load is difficult to keep coaxial with the bearing equipment on the center of gravity, it is impossible to make the load move smoothly, such as the centrifugal phenomenon ...

AI Technical Summary

Problems solved by technology

[0003] In the existing large-scale turntables, simple mechanical devices are often used as the rotating devices, such as bearing connection devices. These traditional rotating devices have no problem when carrying a small workpiece weight, but when carrying large heavy objects, this device is prone to failure , such as: because the load is difficult to keep coaxial with the bearing equipment on the center of gravity, it is impossible to make the load move smoothly, such as the centrifugal phenomenon in rotation; because the load is heavy, the rotating contact surface in the rotating device The friction is also relatively large, resulting in serious wear and tear, the light one shortens the life of the rotating device, and the severe one causes a safety accident during the rotation

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