Hydrostatic spindle
A static pressure spindle and rotating shaft technology, applied in the field of spindles, can solve problems such as the inability to promote thrust bearings, precision and stiffness issues, and achieve the effects of uniform heating temperature distribution, large radial bearing capacity, and small thermal expansion problems
Inactive Publication Date: 2016-06-15
宁波圣圭精工科技有限公司
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Problems solved by technology
This is why most of the hydrostatic bearings in the industry are radial bearings and cannot be promoted on thrust bearings
However, the existing thrust bearings, such as thrust ball bearings and thrust roller bearings, all have problems with the accuracy and rigidity of the line contact between the roller and the shoulder.
Method used
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Embodiment Construction
[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0032] The present invention provides a static pressure spindle, which includes a housing 1 and a rotating shaft 3 that is rotatably fitted in the housing 1 through a radial bearing 2. The housing 1 is provided with a thrust bearing for restricting the movement of the rotating shaft 3 in the axial direction. It is characterized in that the thrust bearing includes a first subcomponent 5 and a second subcomponent 6 that exert an axial balance force on the shoulder 4 of the rotating shaft 3, and the first subcomponent 5 and the second subcomponent 6 are near the shoulder The end faces of 4 are respectively provided with working oil grooves 7, and each working oil groove 7 cooperates with the end surface of the corresponding shoulder 4 to form a main oil chamber, and the first sub-component 5 and the second sub-component 6 are respectively provided ...
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The invention discloses a hydrostatic spindle. The hydrostatic spindle comprises a shell and a rotation axle which rotationally cooperates in the shell by a radial bearing, and a thrust bearing is arranged in the shell. The hydrostatic spindle is characterized in that: the thrust bearing comprises a first sub component and a second sub component which can apply axial balance force on the axle shoulders of the rotation axle, working oil grooves are arranged on the first sub component and the second sub component respectively, the working oil grooves cooperate with the corresponding end surfaces of the axle shoulders to form a main oil cavity, oil inlet brackets for supplying oil to respective working oil grooves are arranged on the first sub component and the second sub component respectively, the main oil cavity is communicated with a first auxiliary oil cavity and a second auxiliary oil cavity respectively, oil supplement systems for supplying the oil to the main oil cavity through the first auxiliary oil cavity when the rotation speed of the rotation axle increases to the critical value are arranged on the first sub component and the second sub component respectively. The hydrostatic bearing can be used as the axial bearing, so that the precision is high, the friction force is small and the axial position limiting effect is good.
Description
technical field [0001] The invention relates to the technical field of spindles, in particular to a static pressure spindle. Background technique [0002] The hydrostatic spindle refers to the sliding friction between its rotating shaft and the bearing through oil, that is to say, the bearing of the hydrostatic spindle is a hydrostatic bearing, and the hydrostatic bearing is a kind of sliding bearing, and its working principle is Pressurized lubricant is forcibly pumped into the tiny gap between the bearing and the shaft by means of a pressure pump. Most hydrostatic bearings in the prior art are radial bearings, which are rarely used in axial bearings. The reason is that when the hydrostatic bearing is a radial bearing, the oil will adhere to the inner surface of the bearing as the shaft rotates and move in the circumferential direction, so it can have a good lubrication effect, but when the hydrostatic bearing is used as a shaft When the bearing is used, it is also called...
Claims
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IPC IPC(8): F16C32/06
CPCF16C32/0629F16C32/0655
Inventor 钟勇军陈满华
Owner 宁波圣圭精工科技有限公司