Radial Foil Bearings
A foil-tape bearing, foil-tape technology, applied in the direction of bearings, shafts and bearings, bearing components, etc., can solve difficult to obtain performance, shortened top foil tape length, bearing load capacity or kinematic characteristics (rigidity and attenuation performance effects, etc. problem, to achieve the effect of easy formation, prevention of falling off, and prevention of decline in durability
Active Publication Date: 2018-09-18
IHI CORP
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- Description
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- Application Information
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Problems solved by technology
However, in this case, the shortening of the top foil tape still affects the load capacity and motion characteristics (rigidity and damping performance) of the bearing, making it difficult to obtain the performance as designed
Method used
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[0038] Hereinafter, the radial foil bearing of the present invention will be described in detail with reference to the drawings. In addition, in the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.
[0039] figure 1 It is a side view showing an example of a turbomachine to which the radial foil bearing of the present invention is applied, figure 1 Reference numeral 1 is a rotating shaft, reference numeral 2 is an impeller provided at an end portion of the rotating shaft, and reference numeral 3 is a radial foil bearing related to the present invention. In addition, in figure 1Only one radial foil bearing is omitted in , but usually two radial foil bearings are provided in the axial direction of the rotary shaft 1 to form a support structure for the rotary shaft 1 . Therefore, in this embodiment also two radial foil bearings 3 are provided.
[0040] On the rotating shaft 1, a thrust collar 4 is fixed in ...
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The radial foil bearing (3) has a top foil (10), a rear foil (11), and a bearing housing (12), and the top foil (10) is opposed to the rotating shaft (1) Configuration, the aforementioned top foil band (10) is cylindrical, the aforementioned rear foil band (11) is arranged on the radially outer side of the aforementioned top foil band, and the aforementioned bearing housing (12) accommodates the aforementioned top foil band and the aforementioned rear foil band , the aforementioned bearing housing (12) is cylindrical, and on the bearing housing, restricting pieces (30, 40) for restricting the movement of the rear foil are provided. A locking concave portion (21) is formed in the central portion in the axial direction of the inner peripheral surface of the bearing housing. Furthermore, the limiter has locking projections ( 32 , 42 ) which are locked into locking recesses and thus fixed to the bearing housing.
Description
[0001] This application claims priority based on Japanese Patent Application No. 2014-28389 for which it applied in Japan on February 18, 2014, and uses the content here. technical field [0002] This invention relates to radial foil bearings. Background technique [0003] Conventionally, as a bearing for a high-speed rotating body, a radial bearing used to surround a rotating shaft is known. As such a radial bearing, there is known a radial foil bearing that includes a top foil, a rear foil, and a bearing housing, the top foil forms a bearing surface, the top foil is in a thin plate shape, and the rear foil The top foil is elastically supported, the bearing case accommodates the top foil and the rear foil, and the bearing case is cylindrical. As the rear foil of the radial foil bearing, a corrugated foil formed by forming a thin plate into a corrugated plate shape is mainly used. [0004] As such a radial foil bearing, in Patent Document 1, especially FIG. 4, or in FIG. 2...
Claims
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IPC IPC(8): F16C27/02
CPCF16C17/024F16C27/02F16C43/02F01D25/166
Inventor 大森直陸
Owner IHI CORP