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Elastic support device for foil dynamic bearing and manufacturing method thereof

An elastic support device and elastic support technology are applied to the rigid support of bearing components, bearings for rotating motion, bearings, etc., which can solve the problems of low bearing capacity, low bearing capacity, and poor temperature resistance, and reduce cycle time and cost. , improve processing efficiency, and broaden the effect of material range

Inactive Publication Date: 2013-11-20
WUHAN HANGDA AERO SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention patent application with publication number CN1563732A and the name of the invention is "Flat Foil Thrust Gas Bearing with Elastic Support for High Speed ​​Turbine Machinery" and the utility model with the publication number CN2363119Y and the name of the invention is "Foil Dynamic Pressure Radial Bearing with Elastic Support" The patent discloses an elastic support structure that uses a rubber sheet instead of a metal foil. The bearing has a simple structure and is easy to manufacture and process, but the elastic rubber sheet used as the support has poor temperature resistance, and the elastic support of the bearing is prone to failure due to overheating. Adjustment, bearing capacity is low, can not achieve industrial applications
[0008] The publication number is patent CN101280801A, and the invention patent application titled "a dynamic pressure gas bearing structure with radial support foil" discloses an elastic support structure with bubbles, which overcomes the temperature resistance of elastic rubber sheets. However, its bubble structure needs to be stamped with a special mold, and its rigidity is uniform and its bearing capacity is low.

Method used

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  • Elastic support device for foil dynamic bearing and manufacturing method thereof
  • Elastic support device for foil dynamic bearing and manufacturing method thereof
  • Elastic support device for foil dynamic bearing and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] figure 1 Shown is a schematic diagram of the structure of a wave-type bearing. The wave-type bearing includes a bearing sleeve 1 , a bearing elastic support 2 , a top foil 3 and a shaft 4 arranged sequentially from outside to inside. The shaft 4 is suspended on the air film and rotates at high speed. When the shaft 4 is stationary, the top foil 3 is closely attached to the shaft 4 due to the elastic support of the bearing 2. When the shaft 4 reaches a certain speed, the generated air film dynamic pressure overcomes the bearing. The elastic force of the elastic support 2 pushes away the top foil 3, so that the shaft 4 is suspended on the air film. In order to enhance the damping of wave-type bearings, the top layer foil 3 can be multi-layered, generally 1 to 3 layers, and the winding direction can be in the same direction or in the opposite direction. The more layers, the stronger the damping performance, but the load The capacity will be reduced, and the damping perfor...

Embodiment 2

[0041] This embodiment is basically the same as Embodiment 1, the difference is: image 3 Shown is a schematic diagram of the vane bearing structure. The elastic support of the radial bearing in the vane bearing is composed of multiple vane radial bearing elastic units 5 connected on both sides. According to the size of the vane bearing, generally 4 pieces are selected. Up to 12 pieces, the advantage of this is that it is easier to assemble than a single piece. In this embodiment, the radial bearing elastic support is composed of 5 blade-shaped radial bearing elastic units 5 .

[0042] see Figure 4 to Figure 5 , the distance between the protrusions 2.1 on the leaf-shaped radial bearing elastic unit 5 gradually decreases from the first key 2.3 to the other end away from it. In this embodiment, the protrusions on the leaf-shaped radial bearing elastic unit 5 There are 5 pieces in 2.1, and the distance between the protrusions 2.1 includes a1, a2, a3 and a4, wherein a1 is on the...

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PUM

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Abstract

The invention discloses an elastic support device for a foil dynamic bearing. The elastic support device comprises a bearing elastic support consisting of a bearing elastic support body and a first key, wherein the first key is arranged at one end of the bearing elastic support body; an angle of 70-100 degrees is formed between the first key and the bearing elastic support body; and the inner and outer surfaces of the bearing elastic support body are provided with a plurality of bumps. The elastic support device has the characteristics of convenience for manufacturing, simple structure, economic efficiency, rationality, adjustable rigidity and relatively strong bearing force, and can be widely applied to the foil dynamic bearing of high-speed turbo-machinery. The invention further discloses a method for manufacturing the elastic support device for the foil dynamic bearing.

Description

technical field [0001] The invention relates to a foil dynamic pressure bearing of a high-speed turbomachinery, in particular to an elastic support device of a foil dynamic pressure bearing and a manufacturing method thereof. Background technique [0002] Foil bearing is a kind of dynamic pressure bearing with fluid as lubricant and foil as elastic supporting element. Since the late 1960s in the United States, it has been successfully applied to the air cycle machine (ACM), the core refrigeration component of the DC-10 aircraft environmental control system, because it is oil-free, high-efficiency, maintenance-free, shock-resistant and vibration-resistant, and anti-pollution With the advantages of strong capability, high reliability, and long service life, air cycle machines supported by foil bearings will be used in almost all civil aviation aircraft in the future. [0003] Foil bearings are divided into two categories: blade-type foil bearings and wave-type foil bearings, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C27/00C23F1/02C25F3/02
Inventor 李玉峰郭志斌何婷顿光明
Owner WUHAN HANGDA AERO SCI & TECH DEV