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Bionic active static pressure gas bearing

A static pressure gas bearing, active technology, applied in the direction of air cushion bearings, bearings, shafts and bearings, to achieve high stiffness and adjustable stiffness

Active Publication Date: 2021-07-09
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have their own disadvantages

Method used

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  • Bionic active static pressure gas bearing
  • Bionic active static pressure gas bearing
  • Bionic active static pressure gas bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0046] The basic structure of this embodiment 2 is the same as that of embodiment 1, except that the bionic airflow regulator is no longer fixedly connected with the bearing end cover, but is constructed as a separate component. A sealant is used to bond the bionic airflow regulator to the wall of the airway, and an air supply channel is provided on the bearing end cover to connect with the bionic airflow regulator to realize air supply. The top view of the independent bionic airflow regulator is as follows: Figure 5 As shown, the overall bearing structure is as Figure 4 shown.

Embodiment 3

[0048] The basic structure of this embodiment 3 is the same as that of embodiment 1, and a restrictor is arranged on the end surface of the bearing, such as Figure 6 shown.

Embodiment 4

[0050] The basic structure of this embodiment 4 is the same as that of embodiment 1, the difference is that four restrictors are arranged on the end surface of the bearing, such as Figure 7 shown.

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Abstract

The invention discloses a bionic active static pressure gas bearing. The bearing is composed of an end cover and a bearing body, the end cover and the bearing body are connected through screws, and the connecting face is coated with sealant for sealing; a bionic air flow regulator is arranged on the lower side of the end cover; and an air channel and a small hole throttler are arranged in the bearing body, and the air outlet end of the small hole throttler is provided with a pressure equalizing cavity. An air source introduces highly-compressed air into a pleated air bag through an air supply channel, radial expansion / contraction is achieved by means of the internal and external pressure difference, the expansion / contraction degree of the regulator can be controlled through active control over the air inflow, therefore, the throttling area is changed, the bearing capacity is directly controlled by means of the change of the throttling area, the changing curve of the rigidity along with the thickness of an air film is changed in real time, the bearing always works near the maximum rigidity in the whole air film thickness changing interval range, and the wide-area high-rigidity effect is achieved.

Description

【Technical field】 [0001] The invention relates to the technical field of static pressure gas bearings, in particular to a bionic active static pressure gas bearing. 【Background technique】 [0002] Due to its nearly zero friction and non-heating characteristics, hydrostatic gas bearings have a wide range of important applications that are irreplaceable in high-speed, light-load, precision and ultra-precision machining and other occasions. In addition, hydrostatic gas bearings are also considered as important machine components for semiconductor processing equipment and nuclear power generation equipment. Bearing stiffness is an important performance index of hydrostatic gas bearings, and it is also the key to ensure bearing accuracy and accuracy retention. However, the low stiffness of gas bearings limits the popularization and application of hydrostatic gas bearings to some extent. At present, improving the stiffness of the gas static pressure bearing can be achieved by in...

Claims

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Application Information

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IPC IPC(8): F16C32/06
CPCF16C32/0603F16C32/0622
Inventor 李文俊宁骁杰冯凯张英杰侯玮杰
Owner HUNAN UNIV
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