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A foil dynamic pressure bearing, casting mold and shaft system

A technology of dynamic pressure bearings and foils, which is applied in the direction of sliding contact bearings, rotating bearings, bearings, etc., can solve the requirements of very high dimensional tolerances and shape and position tolerances, insufficient rotor-bearing systems, and foil dynamic pressure air bearings Problems such as high processing cost, to achieve the effect of saving processing cost, reducing processing cost and improving damping performance

Active Publication Date: 2022-02-18
TIANJIN EMAGING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When processing foil dynamic pressure air bearings, it is necessary to consider the assembly relationship between the bearing sleeve and the bearing seat to ensure that the assembly meets the equipment process requirements. Therefore, the requirements for the dimensional tolerance and shape tolerance of the bearing sleeve are very high. The bearing sleeve The processing cost of the barrel accounts for about 40% of the cost of a single bearing, resulting in high processing costs for foil dynamic pressure air bearings
[0004] In addition, the damping performance of the foil dynamic pressure air bearing composed of only the top foil, the elastic foil and the bearing sleeve is limited, it is difficult to consume the mechanical energy of the rotor-bearing system in time when it vibrates, and the ability to suppress the vibration of the rotor-bearing system is insufficient

Method used

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  • A foil dynamic pressure bearing, casting mold and shaft system
  • A foil dynamic pressure bearing, casting mold and shaft system
  • A foil dynamic pressure bearing, casting mold and shaft system

Examples

Experimental program
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Effect test

Embodiment 1

[0065] see image 3 , this embodiment provides a foil dynamic pressure bearing 100, especially a foil dynamic pressure bearing 100 that does not contain a bearing sleeve 530 and enhances system stability, and is especially suitable for high speed, light load and oil-free working conditions The rotating mechanical shafting system can operate in high temperature and low temperature environments.

[0066] Specifically, the foil dynamic pressure bearing 100 includes a top foil 110 , a corrugated foil 120 and a viscoelastic cylinder 130 . The top foil 110 is connected to the viscoelastic cylinder 130 , and at least part of the corrugated foil 120 is embedded in the viscoelastic cylinder 130 .

[0067] The top foil 110 , the corrugated foil 120 and the viscoelastic cylinder 130 are integrated into one body, and the viscoelastic cylinder 130 is assembled on the bearing seat 200 to complete the installation of the foil dynamic pressure bearing 100 and the bearing seat 200 . Using th...

Embodiment 2

[0069] Please also refer to Figure 4 and Figure 5 , this embodiment provides a foil dynamic pressure bearing 100, especially a foil dynamic pressure bearing 100 that does not contain a bearing sleeve 530 and enhances system stability, which includes a top foil 110, a corrugated foil 120 and a viscoelastic cylinder The body 130, the top foil 110 and the wave foil 120 are all fixed on the viscoelastic cylinder 130, and the three are connected as one. Assembling the viscoelastic cylinder 130 on the bearing seat 200 can complete the installation of the foil dynamic pressure bearing 100 and the bearing seat 200 .

[0070] Please also refer to Figure 6 and Figure 7 , specifically, the top foil 110 is composed of a supporting portion 111 and a fixing portion 112 . Wherein, the support portion 111 is arranged along the axial direction of the foil dynamic pressure bearing 100 , and is in direct contact with the rotating shaft 300 during use. The cross section of the supporting...

Embodiment 3

[0103] see Figure 10 , this embodiment provides a casting mold 400 for processing the above-mentioned foil dynamic pressure bearing 100 , and the casting mold 400 includes a mold body 410 and a positioning member 420 .

[0104] Specifically, the mold body 410 is provided with a cavity for accommodating the top foil 110 and the corrugated foil 120 . The mold cavity is generally cylindrical, and its length is longer than that of the top foil 110 and the corrugated foil 120 . When the top foil 110 and the corrugated foil 120 are placed in the cavity, the side of the connecting section 122 facing away from the support portion 111 is in close contact with the inner wall of the cavity. In addition, an annular groove is formed on the inner wall of the cavity for forming the axial positioning protrusion 134 .

[0105] see Figure 11 Specifically, the positioning member 420 is cylindrical, and one end of the positioning member 420 along the axial direction is provided with a plural...

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Abstract

The invention provides a foil dynamic pressure bearing, a casting mold and a shaft system. The foil dynamic pressure bearing includes a top foil, a corrugated foil and a viscoelastic cylinder, and the corrugated foil and the viscoelastic cylinder are arranged around the top foil; The elastic cylinder is connected, and the top foil is used to support the rotating shaft; at least part of the corrugated foil is embedded in the viscoelastic cylinder so that the viscoelastic cylinder deforms with the corrugated foil; the viscoelastic cylinder is used to constrain the top foil and the corrugated foil, and is connected with the bearing seat connected. The top foil, the corrugated foil and the viscoelastic cylinder are integrated into one body, and the viscoelastic cylinder is assembled on the bearing seat to complete the installation of the foil dynamic pressure bearing and the bearing seat. Using the viscoelastic cylinder instead of the bearing sleeve can save the processing cost of the bearing sleeve and greatly reduce the processing cost of the foil dynamic pressure bearing. In addition, the elastic deformation of the wave foil will also drive the adjacent viscoelastic cylinder to compress or stretch, and the damping performance is greatly improved, so that the mechanical energy of the rotor-bearing system can be quickly consumed during vibration, and the vibration of the rotor-bearing system can be effectively suppressed.

Description

technical field [0001] The invention relates to the field of bearings, in particular to a foil dynamic pressure bearing, a casting mold and a shaft system. Background technique [0002] Common foil dynamic pressure air bearings are composed of top foil, elastic foil and bearing sleeve. The top foil and elastic foil are first fixed in the bearing sleeve by pins to form a complete bearing product, and then the bearing sleeve is installed in the bearing housing of the machine. [0003] When processing foil dynamic pressure air bearings, it is necessary to consider the assembly relationship between the bearing sleeve and the bearing seat to ensure that the assembly meets the equipment process requirements. Therefore, the requirements for the dimensional tolerance and shape tolerance of the bearing sleeve are very high. The bearing sleeve The processing cost of the cylinder accounts for about 40% of the cost of a single bearing, resulting in high processing costs for the foil dy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C27/06F16C17/02F16C37/00F16C33/00B29C39/26B29C39/10
CPCF16C27/063F16C17/024F16C37/00F16C33/00B29C39/26B29C39/10F16C2300/22F16C2322/00F16C2208/10
Inventor 聂慧凡张彪赵俊志毕刘新侯炎恒
Owner TIANJIN EMAGING TECH