A flexible foil gas bearing with distributed reed structure
A technology of gas bearings and elastic foils, applied in the direction of rotating bearings, bearings, shafts and bearings, etc., can solve problems such as inability to work in two directions, inability to design support stiffness, and difficulty in changing support stiffness
Active Publication Date: 2019-04-16
雷茨智能装备(广东)有限公司
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Problems solved by technology
For these two types of structures, both the top and bottom foils are fixed at one end and the other end is free. Therefore, when the bearing is working, the rotor is generally required to rotate in one direction and cannot work in both directions.
In addition, the support stiffness of the bottom arch foil in the direction of the rotor axis is difficult to change. Although the bottom foil is cut into multiple strips along the circumferential direction, and the axial stiffness can be changed to a certain extent by adjusting the support arch structure of each strip, it still cannot be adjusted according to Arbitrary design support stiffness is required
Method used
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Embodiment Construction
[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0022] refer to Figure 1-a , Figure 1-b , figure 2 , image 3 , Figure 4-a and Figure 4-b , a radial elastic foil gas bearing, including three sets of bottom foils 2 and top foils 3 of a certain thickness, the top foil 3 is stacked on the bottom foil 2 and inserted into the three chute 5 of the bearing sleeve 1 Here, the bottom foil 2 and the top foil 3 form an elastic support structure; the bottom foil 2 becomes a hollow structure by removing part of the material, and after bending, it forms a regular or irregular arrangement of distributed reeds 4 at a certain angle. The reed 4 is provided with a free end, and the distributed reed 4 plays a main supporting role. The direction of the distributed reed 4 is distributed along the circumferential direction of the bearing, refer to Figure 5 , the distributed reed 4 has a rectangular, a...
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A radial elastic foil piece gas bearing comprises a plurality of sets of bottom layer foil pieces and a plurality of sets of top layer foil pieces; the top layer foil pieces are stacked on the bottom layer foil pieces and inserted in inclined grooves of a bearing sleeve; and an elastic bearing structure is formed by the bottom layer foil pieces and the top layer foil pieces; the part of materials of the bottom layer foil pieces are removed, and the bottom layer foil pieces become hollow structures; after being bent, the bottom layer foil pieces form regular or irregular distribution type reeds, the distribution reeds are provided with free ends, the distribution type reeds are distributed along the circumference and the axial direction of the bearing, the number, the shape parameters and the intervals of the distribution type reeds are designed according to different needs on the basis of the axial change rule, the distribution reeds on the bottom layer foil pieces are used for freely arranging the local bearing rigidity of the foil pieces, and the bearing capacity and the stability of a bearing assembly are improved.
Description
technical field [0001] The invention relates to the technical field of elastic foil gas bearings, in particular to a radial elastic foil gas bearing with a distributed reed structure. Background technique [0002] The elastic foil gas bearing is a self-acting elastically supported gas dynamic pressure bearing, which is composed of a bearing sleeve, a bottom foil and a top foil. Because a layer of dynamic pressure gas lubricating film is formed between the rotor and the surface of the bearing foil during operation, it does not need lubrication compared with ordinary oil lubrication and rolling bearings, and has high working speed, small friction loss, and can adapt to high temperature working environment, etc. advantage. Elastic foil gas bearings have broad application prospects in high-speed rotating machinery, such as air refrigerators, various small and medium-sized turbo compressors and fans, micro gas turbines, cruise missile engines, etc. [0003] In elastic foil gas ...
Claims
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IPC IPC(8): F16C17/02
CPCF16C17/024F16C2360/23F16C2360/42F16C2360/46
Inventor 孙岩桦田中梁耿海鹏戚社苗虞烈
Owner 雷茨智能装备(广东)有限公司