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    Machining spindle apparatus having a hydrostatic bearing for machine tools
    41.
    发明授权
    Machining spindle apparatus having a hydrostatic bearing for machine tools 失效
    具有用于机床的静压轴承的加工主轴装置

    公开(公告)号：US5833522A

    公开(公告)日：1998-11-10

    申请号：US755557

    申请日：1996-11-22

    Applicant: Yasuo Niino ,  Toshihiko Shima

    Inventor： Yasuo Niino ,  Toshihiko Shima

    IPC: B23Q5/04 ,  B23Q1/26 ,  B23Q1/38 ,  B23Q1/70 ,  B23Q11/08 ,  B24B41/04 ,  F16C32/06 ,  B24B5/00

    CPC classification number: B24B41/04 ,  B23Q1/38 ,  B23Q1/70 ,  B23Q11/0883 ,  F16C32/064 ,  F16C33/766

    Abstract: A machining spindle apparatus has a hydrostatic bearing for machine tools. The machining spindle apparatus includes a built-in motor built into the middle of a housing, as well as front and rear hydrostatic bearings respectively mounted on the front side and the rear side of the housing. A machining spindle is driven by the built-in motor and rotatably supported by the front and rear hydrostatic bearings. The front hydrostatic bearing comprises a radial bearing pocket and a thrust bearing pocket. In addition, a pair of pneumatic seals lie over the radial and thrust bearing pockets. The rear hydrostatic bearing includes a radial bearing pocket and a constant-pressurized oil chamber. The constant-pressurized oil chamber operates as a piston cylinder. Accordingly, a predetermined pressure acts forward, i.e. opposite the thrust bearing pocket of the front hydrostatic bearing. And another pair of pneumatic seals lies over both of the radial bearing pocket and the constant-pressurized oil chamber.

    Abstract translation: 加工主轴装置具有用于机床的静压轴承。 加工主轴装置包括内置于壳体中部的内置马达，以及分别安装在壳体的前侧和后侧的前后静压轴承。 加工主轴由内置电机驱动，并由前后静液压轴承可旋转地支撑。 前静压轴承包括径向轴承座和止推轴承座。 另外，一对气动密封件位于径向和推力轴承座之上。 后静压轴承包括径向轴承凹座和恒定压力油室。 恒压油室用作活塞气缸。 因此，预定的压力向前作用，即与前静压轴承的推力轴承凹槽相对。 而另一对气动密封件位于径向轴承座和恒定压力油室两者之上。

    Self-compensating hydrostatic linear motion bearing
    42.
    发明授权
    Self-compensating hydrostatic linear motion bearing 失效
    自补液压直线运动轴承

    公开(公告)号：US5104237A

    公开(公告)日：1992-04-14

    申请号：US610535

    申请日：1990-11-08

    Applicant: Alexander H. Slocum

    Inventor： Alexander H. Slocum

    IPC: F16C29/02 ,  F16C32/06

    CPC classification number: F16C32/064 ,  F16C29/025 ,  F16C32/0648 ,  F16C32/0659 ,  F16C32/0685 ,  Y10T29/49639

    Abstract: A self-compensating linear fluidstatic or hydrostatic bearing and method in which preferably circular annular pressurized-fluid-receiving grooves provided in the opposed carriage bearing surfaces regulate the fluid fed to longitudinal recess pockets formed in the opposing bearing surfaces to provide a thin film or layer of pressurized fluid in the gaps between a bearing rail and the opposing bearing surfaces; the regulation establishing differential pressures in the opposing bearing surface pockets to compensate for loads applied to opposite sides of the bearing.

    Abstract translation: 一种自补偿线性流体静力或静压轴承和方法，其中设置在相对的托架支承表面中的优选圆形的环形加压流体接收槽调节供给到在相对的支承表面中形成的纵向凹槽的流体，以提供薄膜或层 在轴承轨道和相对的支承表面之间的间隙中的加压流体; 调节在相对的轴承表面凹坑中建立差压以补偿施加到轴承的相对侧的负载。

    Hydrostatic bearing with security of function
    43.
    发明授权
    Hydrostatic bearing with security of function 失效
    静压轴承具有安全功能

    公开(公告)号：US4396302A

    公开(公告)日：1983-08-02

    申请号：US273254

    申请日：1981-06-12

    Applicant: Michel Drevet ,  Jean Trouillet

    Inventor： Michel Drevet ,  Jean Trouillet

    IPC: F16C32/06 ,  F04D29/04 ,  F04D29/047 ,  F04D29/06 ,  F01D25/16

    CPC classification number: F04D29/047 ,  F04D29/061 ,  F16C32/064

    Abstract: In a hydrostatic bearing for pumps of fluid under pressure which is supplied by the pumped fluid, the operation of the bearing is ensured regardless of the conditions present in the pump.To this end, the nozzles of fluid supply of the openings of the race bearing are connected upstream to two compartments of the pump containing the fluid under two different pressures, through the intermediary of a ball valve, and two expansion chambers are arranged in the race on one side and the other of the openings and are connected downstream to the two compartments through the intermediary of ball valves.

    Abstract translation: 在由泵送流体提供的压力下的流体泵的静压轴承中，无论泵内存在的条件如何，均可确保轴承的运行。 为此，滚珠轴承的开口的流体供应喷嘴在两个不同的压力下通过球阀的中间连接在容纳流体的泵的两个隔室中，并且两个膨胀室布置在座圈中 在一侧和另一个开口处，并通过球阀中间连接到两个隔室的下游。

    Hybrid boost bearing assembly
    44.
    发明授权
    Hybrid boost bearing assembly 失效

    公开(公告)号：US3708215A

    公开(公告)日：1973-01-02

    申请号：US3708215D

    申请日：1968-11-14

    Applicant: MECHANICAL TECH INC

    Inventor： WILCOCK D ,  WINN L

    IPC: F16C17/20 ,  F16C21/00 ,  F16C32/06 ,  F16C33/10 ,  F16C32/00

    CPC classification number: F16C33/106 ,  F16C17/047 ,  F16C17/20 ,  F16C19/06 ,  F16C21/00 ,  F16C32/064 ,  F16C32/0681 ,  F16C33/6659 ,  F16C39/02 ,  F16C2240/40 ,  F16C2360/23

    Abstract: A hybrid boost bearing assembly is described for a rotating shaft member which is rotatably supported on a base member. The hybrid boost bearing assembly comprises a rolling element bearing for rotatably supporting the shaft member on the base member during starts, stops, reverse thrust loadings and under emergency operating conditions, and a fluid film bearing acting singly or coacting with the rolling element bearing for absorbing the loads imposed on the shaft member during all other conditions of operation. A fluid lubricant supply is provided for supplying fluid lubricant to the bearings and means are provided for shifting the loading of the rotating shaft member from the rolling element bearing to the fluid film bearing as the rotating shaft member is brought up to its normal operating speed. The means for shifting the loading from the rolling element bearing to the fluid film bearing comprises the generation of pressure in the fluid film space between the opposed fluid film bearing surfaces, by hydrodynamic action, from an external source of pressure, or by some other means, thereby causing the fluid film bearing to assume a greater share of the load of the rotating shaft as it is brought up to normal operating speed. As a result, the rolling element bearing will assume substantially the full load of the rotating shaft only during starting, stopping, reverse loading periods, and in the event of the failure of the fluid lubricant supply, while the fluid film bearing will absorb the shaft loads under all other conditions of operation. The fluid film bearing may comprise a hydrodynamic bearing for producing a self-acting fluid film, a hydrostatic bearing, or a hybrid hydrodynamic-hydrostatic bearing, and the rolling element bearing may comprise a ball bearing, roller bearing, needle bearing, or the like. In certain arrangements a preloading spring is provided for preloading the rolling element bearing a predetermined amount so that the rolling element bearing assumes a predetermined proportionate share of the loading on the rotating shaft under certain operating conditions. In other arrangements, a retractable bearing piston portion which moves towards and retracts from an opposed, load-sustaining bearing surface is employed to cause the fluid film bearing to assume the load from the rolling element bearing. In other arrangements, a spherically-shaped self-aligning seat is provided which coacts with a complementary-shaped seating surface to accommodate misalignment in the rotating shaft supported by the bearing assembly.

    Hydrostatic bearing
    45.
    发明授权
    Hydrostatic bearing 失效
    防静电轴承

    公开(公告)号：US3671155A

    公开(公告)日：1972-06-20

    申请号：US3671155D

    申请日：1970-04-13

    Applicant: CASE CO J I

    Inventor： DUBINSKY TERENCE N

    IPC: F01C21/02 ,  F04C15/00 ,  F16C21/00 ,  F16C32/06 ,  F01C21/04 ,  F16C13/02 ,  F16C33/66

    CPC classification number: F16C32/064 ,  F01C21/02 ,  F04C15/0042 ,  F04C2240/54 ,  F04C2240/56 ,  F16C21/00 ,  F16C32/0659 ,  F16C32/0688

    Abstract: THE PRESENT DISCLOSURE RELATES TO AN APPARATUS FOR SUPPORTING A ROTATING ELEMENT RELATIVE TO A HOUSING OF A FLUID TRANSLATING DEVICE BY PRIMARY AND SECONDARY BEARING MEANS. THE SECONDARY BEARING MEANS INCLUDES FIRST AND SECOND SLEEVES SURROUNDING THE ROTOR SUPPORTING SHAFT WITH EACH OF THE SLEEVES HAVING A PLURALITY OF OUTER RECESSES COOPERATING WITH THE HOUSING TO PRODUCE POCKETS OR CHAMBERS AND A PLURALITY OF INNER RECESSES COOPERATING WITH THE SHAFT TO PRODUCE INNER POCKETS OR CHAMBERS. EACH OUTER POCKET RECEIVES DIVERTED PRESSURED FLUID FROM THE OUTER POCKET RECEIVES DIVERTED PRESSURED FLUID FROM THE PORT WHICH IS IN OPPOSED RELATIONSHIP ON THE ROTOR OR POCKET TO DIRECT THIS FLUID INTO THE AREA BETWEEN THE SHAFT AND THE BEARING SLEEVE. THE INTERNAL SURFACE OF THE SLEEVE HAS TWO OPPOSED CIRCULAR SEGMENTS HAVING EQUAL RADII WITH THE CENTERS OF THE SEGMENTS SPACED FROM EACH OTHER WITH THE RADII BEING SUBSTANTIALLY EQUAL TO THE DIAMETER OF THE SHAFT. THE INNER POCKETS ARE DIVIDED INTO FIRST AND SECOND AXIALLY SPACED PORTIONS SO THAT ANY AXIAL MISALIGNMENT BETWEEN THE SLEEVES AND THE BEARING WILL INCREASE THE FLOW PATH BETWEEN THE BEARING AND THE SHAFT ALONG ONE EDGE OF THE SLEEVE AND DECREASE THE FLOW PATH ALONG THE OPPOSITE EDGE TO PRODUCE A PRESSURE DIFFERENTIAL THEREBY AUTOMATICALLY ALIGNING THE SLEEVE AND SHAFT.

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