Static-dynamic pressure main shaft
A static and dynamic pressure, spindle technology, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve the problem of narrow use range, achieve the effect of expanding the application range and reducing the use cost
Inactive Publication Date: 2015-12-23
宁波朗曼达工具有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and to provide an enhanced static and dynamic pressure spindle which is convenient to use, reliable and safe, has a long service life and excellent performance, so as to overcome the scope of use of the existing static and dynamic pressure spindle narrow deficiency
Method used
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[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.
[0023] The structure of the hydrostatic spindle of this embodiment is as follows: Figure 1 to Figure 3 What is shown includes: a main shaft body 1 and a main shaft 17 fitted in the main shaft body 1 . A first rolling bearing 10 , a first hydrostatic pressure bearing 5 , a second hydrostatic pressure bearing 4 and a second rolling bearing 14 are sequentially arranged between the outer wall of the main shaft 17 and the inner wall of the main shaft body 1 . When the main shaft 17 starts and stops or the oil circuit failure has not effectively established the static and dynamic pressure effect, the first rolling bearing 10 and the second rolling bearing 14 take on the role...
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The invention discloses a static-dynamic pressure main shaft which comprises a main shaft body, a main shaft, a first rolling bearing, a first static-dynamic pressure bearing, a second static-dynamic pressure bearing and a second rolling bearing. The outer surfaces of the side portions of the first static-dynamic pressure bearing and the second static-dynamic pressure bearing are each provided with two annular communicated hydraulic oil grooves, and the inner surfaces of the side portions of the first static-dynamic pressure bearing and the second static-dynamic pressure bearing are each provided with a plurality of wedge-shaped oil cavities communicated with the corresponding hydraulic oil grooves. An oil inlet channel and an oil outlet channel are formed in the main shaft body. Pressure oil entering the oil inlet channel enters the first static-dynamic pressure bearing and the second static-dynamic pressure bearing through the hydraulic oil grooves and overflows from gaps of precision fit faces between the first and second static-dynamic pressure bearings and the main shaft to become low-pressure oil, and the low-pressure oil enters the oil outlet channel to sufficiently lubricate the first rolling bearing and the second rolling bearing. It is ensured that contact friction between the main shaft and static-dynamic pressure bearing sleeves is avoided on the conditions of start, stop, oil way failures and excess-load working, and the running safety and reliability of the main shaft are improved.
Description
technical field [0001] The invention relates to a main shaft, in particular to a static and dynamic pressure main shaft which adopts a rolling bearing for pilot and reinforcement. Background technique [0002] Spindle is a key component of various machine tools. The use of rolling bearings and static and dynamic pressure bearings as spindle bearings are typical design and application solutions, and both have their own advantages. The rolling bearing of the main shaft with rolling bearing is a standard part of industrial production, with complete functions and varieties, so the design and manufacturing cost is low, easy to use and maintain, and widely used. However, due to the mechanical wear of the rolling bearing, the maintenance of the spindle motion accuracy is poor, which affects the working life of the spindle. In addition, because the bearing is composed of multiple parts, the structure is more complicated and the manufacturing accuracy is problematic, the spindle usi...
Claims
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IPC IPC(8): F16C32/06F16C35/00
Inventor 刘大猷曹星星张海清
Owner 宁波朗曼达工具有限公司