JPH0318655U

JPH0318655U -

Info

Publication number: JPH0318655U
Application number: JP7552289U
Authority: JP
Priority date: 1989-06-29
Filing date: 1989-06-29
Publication date: 1991-02-25
Anticipated expiration: 2004-06-29
Also published as: JPH0742214Y2

Description

[Brief explanation of drawings]

第１図は第１実施例の流体軸受モータの中心断
面図、第２図ａ，ｂは第１図に基づく構造の流体
軸受モータの具体例の中心断面図とＺ−Ｚ′矢視
図、第３図は第２実施例の流体軸受モータの中心
断面図、第４図は第３実施例の流体軸受モータの
中心断面図、第５図は第４実施例の流体軸受モー
タの中心断面図、第６図は流体軸受を用いた従来
技術の流体軸受モータの形式の内の本願出願人の
提案になる流体軸受モータの中心断面図、第７図
ａは流体軸受モータの流体の流れを矢印で示す図
、第７図ｂは第７図ａのＹ−Ｙ′矢視断面におけ
る圧力分布図、第７図ｃは第７図ａのＸ−Ｘ′矢
視断面における圧力分布図、第８図は別構成の従
来の流体軸受モータの中心断面図、第９図ａは流
体軸受モータの流体の流れを矢印で示した図、第
９図ｂは第９図ａのＹ−Ｙ′矢視断面における圧
力分布図である。図中、１……流体通路、１ａ，１ｂ……開口部
、２……スリーブ、３……円盤、４……ポリゴン
ミラー、５……上部ハウジング、６……磁石、７
……下部ハウジング、８……ステータ、９……軸
体、１００……ハウジングである。 FIG. 1 is a central sectional view of a hydrodynamic bearing motor according to the first embodiment, FIGS. 2a and 2b are a central sectional view and a Z-Z' view of a specific example of a hydrodynamic bearing motor having a structure based on FIG. FIG. 3 is a central sectional view of the hydrodynamic bearing motor of the second embodiment, FIG. 4 is a central sectional view of the fluid bearing motor of the third embodiment, and FIG. 5 is a central sectional view of the fluid bearing motor of the fourth embodiment. , Fig. 6 is a central sectional view of a hydrodynamic bearing motor proposed by the applicant, which is one of the prior art hydrodynamic bearing motor types using hydrodynamic bearings, and Fig. 7a shows the flow of fluid in the hydrodynamic bearing motor with arrows. Figure 7b is a pressure distribution diagram in the Y-Y' arrow cross section of Figure 7a, Figure 7c is a pressure distribution diagram in the X-X' arrow cross section of Figure 7a, and Figure 8 The figure is a central sectional view of a conventional hydrodynamic bearing motor with a different configuration, Fig. 9a is a diagram showing the flow of fluid in the hydrodynamic bearing motor with arrows, and Fig. 9b is a view taken along the Y-Y' arrow in Fig. 9a. It is a pressure distribution diagram in a cross section. In the figure, 1...fluid passage, 1a, 1b...opening, 2...sleeve, 3...disc, 4...polygon mirror, 5...upper housing, 6...magnet, 7
... lower housing, 8 ... stator, 9 ... shaft body, 100 ... housing.

Claims

[Claims for Utility Model Registration] A hydrodynamic bearing motor comprising a rotor that is rotatably supported by a hydrodynamic bearing provided in a closed housing and receives rotational driving force from a driving means, the rotor A hydrodynamic bearing motor, characterized in that a fluid passage is provided in the inner surface of the housing with both ends thereof open to make uniform the bias in the pressure distribution on the outer surface of the rotor that occurs when the rotor rotates.