Hydrodynamic bearing with an additional reservoir

Abstract

Disclosed herein is a hydrodynamic bearing having an additional fluid reservoir, which has improved ability to efficiently seal fluid (lubricant), which generates dynamic pressure. The hydrodynamic bearing has an annular fluid storage space coupled to the lower portion of a fluid reservoir, in addition to the existing fluid reservoir formed in the upper portion of a hydrodynamic space. In particular, the fluid storage space has a tapered cross-section which is increased in the direction from the end where the fluid storage space is coupled to the fluid reservoir to the opposite end (the portion where a through hole is formed), thus serving as an additional fluid reservoir for sealing fluid and supplying the fluid to the hydrodynamic space. Further, unlike the prior art, where the surface of the fluid is controlled using only the existing fluid reservoir, having a relatively narrow area, the surface of the fluid can be controlled using both a wider fluid storage space and the existing fluid reservoir, thus affording convenience when the hydrodynamic bearing is used.

Description

[0001] Related Application Cross Reference [0002] This application claims the benefit of Korean Patent Application No. 10-2006-0035824, filed Apr. 20, 2006, entitled "Hydrodynamic Bearing with Additional Reservoir," the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates generally to a hydrodynamic bearing and, more particularly, to a hydrodynamic bearing with an additional fluid reservoir having an improved ability to effectively seal fluid (lubricant) ability, the fluid (lubricant) generates dynamic pressure. Background technique [0004] Sealing of fluid (lubricant) is one of the most important features required for hydrodynamic bearings. Therefore, a large number of technologies related to fluid control in hydrodynamic bearings are required, including sealing properties of fluid injected into the hydrodynamic bearing, injection of the fluid, and control of the fluid surface. However, only some of the t...

AI Technical Summary

Problems solved by technology

[0011] The problem with this conventional sealing structure is that the fluid is injected through the relatively narrow fluid reservoir 162 defined between the end cap 132 and the spacer 150, making it difficult to inject fluid.

In addition, it is difficult to control the injection of fluid and the fluid surface due to the fact that the end cap 132 makes it difficult for the operator to determine the amount of fluid injected.

[0012] Therefore, a problem with the conventional sealing structure is that the capacity of the fluid storage part 162 is relatively small, so that after the fluid dynamic pressure bearing is used for a long period of time, the fluid in the fluid dynamic pressure bearing evaporates or is discharged to the outside, thus causing the fluid dynamic pressure bearing Insufficient fluid in

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