Scaling structure type line dynamic and static pressure air bearing

A scaling structure and floating bearing technology, applied in the direction of bearings, shafts, bearings, bearing components, etc., can solve the problems of easy disturbance in the flow field, aerodynamic instability, unstable shutdown, etc., and achieve widening range, high reliability, and smooth operation stable effect

Active Publication Date: 2018-08-31
南京耦合动力工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The main problem of conventional dynamic and static pressure hybrid air bearings is: the air supply nozzle of the static pressure system is located in the booster channel groove of the dynamic pressure system, when the static pressure When the air supply of the system is uneven or the rotor vibrates, the flow field formed by the air coming in from the air supply nozzle is prone to disturbance, and the support stiffness at both ends of the bearing is no longer equal, resulting in high-speed rotating machinery vibration or serious instability and shutdown; the traditional simple Rectangular inner channel, the shape of the channel cannot exert the best effect of dynamic pressure, which will lead to insufficient load at low speed and aerodynamic instability at high speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A linear dynamic and static pressure air bearing with a scaling structure, which consists of: a bearing body 2, the inner surface of the bearing has a dynamic pressure structure, and the dynamic pressure structure is a scaling linear pressurized channel groove 3, and the There is a static pressure structure on the bearing body, the static pressure structure includes an air supply hole 4, the air supply hole communicates with the throttle nozzle 5, and an elastic ring 6 is installed on the bearing body, as attached figure 1 As shown, the rotor shaft diameter 1 is installed in the bearing body.

Embodiment 2

[0026] According to the scaling structure type line dynamic and static pressure air bearing described in embodiment 1, the said scaling type line pressurized flow channel groove is a Rafal nozzle type line pressurized flow channel groove or a fish head type line pressurized flow channel groove . The groove line adjusts the radial and axial pressure distribution of the air film through different angles: when the angle between the groove line and the axial direction is large, the radial air film force is large; when the angle is small, the axial air force Membrane force is greater.

[0027] According to the characteristics of forming air film force, it is respectively applied to long bearings and short bearings; there are two rows of static pressure small hole throttles on the inner surface, which are respectively located on the scaling structure type slot table, and the direction of the nozzle of the throttle port is in line with the inner surface of the bearing. Tangentially ...

Embodiment 3

[0030] The scaling structure type linear dynamic and static pressure air bearing described in embodiment 1 or 2:

[0031] (1) Selection of air bearing body material, that is, according to the temperature, pressure and working medium of the air bearing application, reasonably select wear-resistant, high temperature resistant and self-lubricating performance materials as the material of the air bearing body;

[0032] (2) The hydrodynamic structure design of the air bearing, that is, according to the temperature, pressure and working fluid conditions of the air bearing application, as well as the journal rotation, whirl speed and load bearing properties, reasonably determine the shape of the scaling structure; The static pressure structure design adopts small hole throttling;

[0033] (3) The body structure design of the air bearing, that is, according to the load nature, stability requirements and working medium conditions of the air bearing, measures such as rubber rings, metal...

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PUM

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Abstract

Scaling structure profile hydrodynamic air bearing. The traditional air bearing adopts a simple rectangular inner channel, and the profile of the channel cannot exert the best effect of dynamic pressure, which will lead to the problem of insufficient load at low speed and aerodynamic instability at high speed. The composition of the present invention includes: a bearing body (2), the inner surface of the bearing body has a dynamic pressure structure, and the dynamic pressure structure is a scaling linear pressurized channel groove (3), and the bearing body has a static Pressure structure, the static pressure structure includes an air supply hole (4), the air supply hole communicates with the throttle nozzle (5), and the elastic ring (6) is installed on the bearing body. The invention is used to support high-speed rotating machinery.

Description

Technical field: [0001] The invention relates to a dynamic and static pressure air bearing with a scaling structure profile. Background technique: [0002] Gas lubricated bearing technology is a high-tech developed rapidly in the middle of the 20th century. It uses the viscosity of the gas to increase the pressure of the gas in the gap to support the object. Air bearings have the advantages of "lightweight, clean, smooth operation, strong environmental adaptability, and wide temperature adaptability", so they are widely used in industries such as national defense, energy, machine tools, and medical care, especially in high-speed rotary machinery and ultra-precision instrument technology field has obvious advantages. [0003] According to the principle of pressure generation, air bearings can be divided into static pressure type and dynamic pressure type. The static pressure type bearing is to input the pressurized gas from the outside, enter the bearing through the restric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/06F16C33/00
Inventor 杨金福黄锴陈策陈昌婷邱敬乐
Owner 南京耦合动力工程技术有限公司
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