公开(公告)号：EP0769628A1

公开(公告)日：1997-04-23

申请号：EP96114887.1

申请日：1996-09-17

申请人： HITACHI, LTD. ,  JAPAN SERVO CO. LTD.

发明人： Nakano, Masaaki ,  Kono, Takashi ,  Tomida, Kenji ,  Inoue, Tomoaki ,  Nishida, Hiroshi ,  Nishimura, Yuji ,  Sato, Takeru ,  Hatori, Sachio

IPC分类号： F16C33/10

CPC分类号： F16C17/102 ,  F16C17/028 ,  F16C17/18 ,  F16C33/1035 ,  F16C33/107 ,  F16C33/1075 ,  F16C2370/12 ,  G11B19/2009 ,  G11B25/043

摘要： A bearing device where a sliding bearing rotatably supporting a shaft is molded with an inexpensive sintered material, three asymmetrical circular arc-shaped radial bearings are formed in the inner peripheral surface of the shaft, taper land-shaped thrust bearings are formed in the opposite end surfaces of the radial bearing surface, T-shaped bubble removing means which is constituted by axial and radial flow passages formed in the shaft opposed to the radial bearing is provided, and magnetic fluid is used as a lubricant. A magnetic disk unit using the bearing device is also disclosed.

摘要翻译： 一种轴承装置，其中可旋转地支撑轴的滑动轴承用廉价的烧结材料模制，在轴的内周面形成有三个不对称的圆弧形径向轴承，锥形止推轴承形成在相对端 提供径向支承面的表面，设置有与径向轴承相对的轴上形成的轴向和径向流动通道构成的T形气泡去除装置，并使用磁性流体作为润滑剂。 还公开了一种使用该轴承装置的磁盘单元。

公开(公告)号：EP0769628B1

公开(公告)日：2002-11-27

申请号：EP96114887.1

申请日：1996-09-17

申请人： Hitachi, Ltd. ,  JAPAN SERVO CO. LTD.

发明人： Nakano, Masaaki ,  Kono, Takashi ,  Tomida, Kenji ,  Inoue, Tomoaki ,  Nishida, Hiroshi ,  Nishimura, Yuji ,  Sato, Takeru ,  Hatori, Sachio

IPC分类号： F16C33/10

CPC分类号： F16C17/102 ,  F16C17/028 ,  F16C17/18 ,  F16C33/1035 ,  F16C33/107 ,  F16C33/1075 ,  F16C2370/12 ,  G11B19/2009 ,  G11B25/043

公开(公告)号：EP0658895B1

公开(公告)日：2000-07-05

申请号：EP94119451.6

申请日：1994-12-08

申请人： Hitachi, Ltd.

发明人： Yoshida, Takashi ,  Kono, Takashi ,  Tomida, Kenji ,  Inoue, Tomoaki ,  Nakano, Masaaki ,  Amano, Hideaki ,  Mori, Kenji

IPC分类号： G11B19/20 ,  G11B25/04 ,  F16C33/10 ,  H02K5/124 ,  H02K5/16

CPC分类号： F16C17/026 ,  F16C17/047 ,  F16C17/107 ,  F16C33/1035 ,  F16C33/107 ,  F16C33/1075 ,  F16C2370/12 ,  G11B19/2009 ,  G11B25/043 ,  H02K5/124 ,  H02K5/1677

摘要： A recording disk apparatus comprises a clearance between a shaft (26, 77, 105, 201, 304) and a thrust bearing portion (15, 28, 118, 119) tapered in a circumferential direction, a lubricant communication groove (43-45, 123, 203) of a bearing (17, 72, 107, 202, 302) covered by the shaft so that a lubricant on a radial bearing portion (12, 25, 117a, 117b, 209) communicates with the lubricant on the thrust bearing portion through the lubricant communication groove, a lubricant circulating path (123, 208) which extends axially from the thrust bearing portion to the radial bearing portion to prevent the lubricant flowing out of the thrust bearing portion from returning directly to the thrust bearing portion without passing the radial bearing portion, and/or a clearance between a slide bearing (26, 77, 105, 201, 304, 17, 72, 107, 202, 302) and a magnetic fluid seal device (11, 24, 80, 125, 313, 317) substantially filled with a magnetic fluid lubricant.

公开(公告)号：EP0094075A2

公开(公告)日：1983-11-16

申请号：EP83104548.9

申请日：1983-05-09

申请人： HITACHI, LTD.

发明人： Tomioka, Shunzoo ,  Nakano, Masaaki ,  Okano, Kinpei ,  Shimizu, Kousaku ,  Yoda, Hiroaki Hitachitsukuba-House 2-203

IPC分类号： F04D29/04

CPC分类号： F04D29/047 ,  F04D29/049

摘要： A vertical motor pump including an upper bearing and a lower bearing on the motor side for jouraling a rotary shaft (3) for rotation at an upper portion and a lower portion respectively of a rotor (91), at least one of the upper bearing and the lower bearing is constituted by a ball bearing (4A). The vertical motor pump further includes a hydrostatic lubricated bearing system (51, 51') for journaling the rotary shaft (3) besides the ball bearing (4A), for bearing a radial thrust applied to the rotary shaft (3) during operation.

公开(公告)号：EP0658895A3

公开(公告)日：1997-06-04

申请号：EP94119451.6

申请日：1994-12-08

申请人： HITACHI, LTD.

发明人： Yoshida, Takashi ,  Kono, Takashi ,  Tomida, Kenji ,  Inoue, Tomoaki ,  Nakano, Masaaki ,  Amano, Hideaki ,  Mori, Kenji

IPC分类号： G11B19/20 ,  G11B25/04

CPC分类号： F16C17/026 ,  F16C17/047 ,  F16C17/107 ,  F16C33/1035 ,  F16C33/107 ,  F16C33/1075 ,  F16C2370/12 ,  G11B19/2009 ,  G11B25/043 ,  H02K5/124 ,  H02K5/1677

摘要： A recording disk apparatus comprises a clearance between a shaft (26, 77, 105, 201, 304) and a thrust bearing portion (15, 28, 118, 119) tapered in a circumferential direction, a lubricant communication groove (43-45, 123, 203) of a bearing (17, 72, 107, 202, 302) covered by the shaft so that a lubricant on a radial bearing portion (12, 25, 117a, 117b, 209) communicates with the lubricant on the thrust bearing portion through the lubricant communication groove, a lubricant circulating path (123, 208) which extends axially from the thrust bearing portion to the radial bearing portion to prevent the lubricant flowing out of the thrust bearing portion from returning directly to the thrust bearing portion without passing the radial bearing portion, and/or a clearance between a slide bearing (26, 77, 105, 201, 304, 17, 72, 107, 202, 302) and a magnetic fluid seal device (11, 24, 80, 125, 313, 317) substantially filled with a magnetic fluid lubricant.

摘要翻译： 记录盘装置包括轴（26,77,105,301,304）与沿周向渐缩的止推轴承部分（15,28,118,119）之间的间隙，润滑剂连通槽（43-45， 轴承（17,72,107,202,302）的轴承（123,2203），轴承（17,72,107,202,302）被轴承覆盖，使得径向轴承部分（12,25,117a，117b，209）上的润滑剂与止推轴承 通过润滑剂连通槽的润滑剂循环路径（123,208），其从止推轴承部分轴向延伸到径向轴承部分，以防止润滑剂从止推轴承部分流出而不经过直接返回到止推轴承部分 径向轴承部分和/或滑动轴承（26,77,105,201,304,177,27,202,302）与磁性流体密封装置（11,24，80,125,302）之间的间隙， 313,317），其基本上填充有磁性流体润滑剂。

公开(公告)号：EP0094075A3

公开(公告)日：1984-08-22

申请号：EP83104548

申请日：1983-05-09

申请人： HITACHI, LTD.

发明人： Tomioka, Shunzoo ,  Nakano, Masaaki ,  Okano, Kinpei ,  Shimizu, Kousaku ,  Yoda, Hiroaki Hitachitsukuba-House 2-203

IPC分类号： F04D29/04

CPC分类号： F04D29/047 ,  F04D29/049

摘要： A vertical motor pump including an upper bearing and a lower bearing on the motor side for jouraling a rotary shaft (3) for rotation at an upper portion and a lower portion respectively of a rotor (91), at least one of the upper bearing and the lower bearing is constituted by a ball bearing (4A). The vertical motor pump further includes a hydrostatic lubricated bearing system (51, 51') for journaling the rotary shaft (3) besides the ball bearing (4A), for bearing a radial thrust applied to the rotary shaft (3) during operation.

公开(公告)号：EP0658895A2

公开(公告)日：1995-06-21

申请号：EP94119451.6

申请日：1994-12-08

申请人： HITACHI, LTD.

发明人： Yoshida, Takashi ,  Kono, Takashi ,  Tomida, Kenji ,  Inoue, Tomoaki ,  Nakano, Masaaki ,  Amano, Hideaki ,  Mori, Kenji

IPC分类号： G11B19/20 ,  G11B25/04

CPC分类号： F16C17/026 ,  F16C17/047 ,  F16C17/107 ,  F16C33/1035 ,  F16C33/107 ,  F16C33/1075 ,  F16C2370/12 ,  G11B19/2009 ,  G11B25/043 ,  H02K5/124 ,  H02K5/1677

摘要： A recording disk apparatus comprises a clearance between a shaft (26, 77, 105, 201, 304) and a thrust bearing portion (15, 28, 118, 119) tapered in a circumferential direction, a lubricant communication groove (43-45, 123, 203) of a bearing (17, 72, 107, 202, 302) covered by the shaft so that a lubricant on a radial bearing portion (12, 25, 117a, 117b, 209) communicates with the lubricant on the thrust bearing portion through the lubricant communication groove, a lubricant circulating path (123, 208) which extends axially from the thrust bearing portion to the radial bearing portion to prevent the lubricant flowing out of the thrust bearing portion from returning directly to the thrust bearing portion without passing the radial bearing portion, and/or a clearance between a slide bearing (26, 77, 105, 201, 304, 17, 72, 107, 202, 302) and a magnetic fluid seal device (11, 24, 80, 125, 313, 317) substantially filled with a magnetic fluid lubricant.

公开(公告)号：EP0094075B1

公开(公告)日：1988-08-31

申请号：EP83104548.9

申请日：1983-05-09

申请人： HITACHI, LTD.

发明人： Tomioka, Shunzoo ,  Nakano, Masaaki ,  Okano, Kinpei ,  Shimizu, Kousaku ,  Yoda, Hiroaki Hitachitsukuba-House 2-203

IPC分类号： F04D29/04

CPC分类号： F04D29/047 ,  F04D29/049