CN204716760U - A kind of tilting-type lubricating pad of round chamber hydrostatic thrust bearing - Google Patents
A kind of tilting-type lubricating pad of round chamber hydrostatic thrust bearing Download PDFInfo
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- CN204716760U CN204716760U CN201520170075.4U CN201520170075U CN204716760U CN 204716760 U CN204716760 U CN 204716760U CN 201520170075 U CN201520170075 U CN 201520170075U CN 204716760 U CN204716760 U CN 204716760U
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- oil
- lubricating pad
- thrust bearing
- tilting
- hydrostatic thrust
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- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 12
- 230000001050 lubricating effect Effects 0.000 title claims abstract 12
- 239000003921 oil Substances 0.000 claims abstract description 61
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 2
- 230000003068 static effect Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 238000007323 disproportionation reaction Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
技术领域 technical field
本发明涉及一种圆形腔静压推力轴承的可倾式油垫。 The invention relates to a tiltable oil pad of a circular cavity hydrostatic thrust bearing.
背景技术 Background technique
液体静压推力轴承具有运行精度高，功耗低，吸振性能好，工作寿命长，稳定性能好等特点，已成为能源、交通、重型机械、航空航天、舰船制造和国防等国家重点行业领域大型数控装备的核心部件。高速重载下静压推力轴承高速运行的过程中，由于油流惯性造成甩油增加，剪切发热增大，润滑油粘度下降，导致间隙油膜变薄，加之油膜温度分布不均匀，产生局部热局部温度过高导致弹性变形。另外摩擦副也将因变形，导致油膜厚度分布不均匀，润滑条件恶劣，这种情况下会导致静压推力轴承的摩擦失效，进而机床影响加工效率。给我国的经济发展带来损失。 Hydrostatic thrust bearings have the characteristics of high running accuracy, low power consumption, good vibration absorption performance, long working life, and good stability. They have become national key industries such as energy, transportation, heavy machinery, aerospace, shipbuilding, and national defense. The core component of large CNC equipment. During the high-speed operation of the hydrostatic thrust bearing under high-speed and heavy load, due to the inertia of the oil flow, the oil rejection increases, the shear heat increases, and the viscosity of the lubricating oil decreases, resulting in thinning of the oil film in the gap, and the uneven temperature distribution of the oil film generates local heat. Excessive local temperature leads to elastic deformation. In addition, the friction pair will also be deformed, resulting in uneven distribution of oil film thickness and poor lubrication conditions. In this case, the friction of the hydrostatic thrust bearing will fail, and the machine tool will affect the processing efficiency. Bring losses to our country's economic development.
发明内容 Contents of the invention
本发明主要是解决在静压推力轴承高速重载中出现的摩擦失效而提出一种比较合理的油垫的结构形式，保证静压推力轴承稳定，高精度的工作，而且本发明结构简单，便于加工制造。 The present invention mainly solves the frictional failure that occurs in the high-speed and heavy-load of the static pressure thrust bearing and proposes a more reasonable structure of the oil pad to ensure the stability and high-precision work of the static pressure thrust bearing. Moreover, the structure of the present invention is simple and convenient Manufacturing.
为了解决这摩擦失效一难题本发明采用的技术方案如下；一种圆形腔可倾式的油垫本体为大半圆形，它的上面是一个圆形油腔，油腔内有一个进油口，液压油通过进油口流入油腔。油垫的下端做成了一个薄的圆柱形结构凸台，此圆柱凸台安装在底座上。 In order to solve this problem of frictional failure, the technical scheme adopted by the present invention is as follows; a kind of oil pad body with a circular chamber tilting type is a large semicircle, and above it is a circular oil chamber, and there is an oil inlet in the oil chamber , hydraulic oil flows into the oil chamber through the oil inlet. The lower end of the oil pad is made into a thin cylindrical structural boss, and the cylindrical boss is installed on the base.
本发明，为高速重载静压静压支承提高旋转精度和稳定性提供技术支持。依据摩擦学理论和静压润滑技术，实验研究相结合方式，优化得到最优的凸台结构，从而解决了摩擦失效难题，为我国数控卧式车床的承载和提速提供一份技术支持，也为静压支承理论的发展提供了一份实践依据。 The invention provides technical support for improving the rotation accuracy and stability of the high-speed and heavy-duty static pressure support. According to the theory of tribology and static pressure lubrication technology, combined with experimental research, the optimal boss structure is optimized, thus solving the problem of friction failure, providing a technical support for the bearing and speed increase of CNC horizontal lathes in my country, and also for The development of static pressure bearing theory provides a practical basis.
附图说明 Description of drawings
图1、图2和图3是圆形油垫的三维立体图，图4是单个油垫与十二分之一底座装配图，图5是12个圆形可倾式油垫沿底座2排列简图。 Figure 1, Figure 2 and Figure 3 are three-dimensional perspective views of circular oil pads, Figure 4 is an assembly drawing of a single oil pad and one-twelfth of the base, and Figure 5 is a simplified arrangement of 12 circular tiltable oil pads along the base 2 picture.
具体实施方式 Detailed ways
结合各个说明书附图说明；一种静压推力轴承的可倾式圆形油垫1主要是油垫的主体结构，它的形状是大半圆形，油垫的上端是一个圆形的油腔1-1，油腔内有一个进油口1-2液压油通过进油口1-2流入油腔1-1。油垫的下端做成了一个薄的圆柱形结构凸台1-3，此凸台安装在底座3上。油垫总厚度是18mm，外圆直径300mm,油腔深度是7mm，凸台高度为3mm，凸台直径为60mm。 Combined with the accompanying drawings of each manual, a tiltable circular oil pad 1 of a hydrostatic thrust bearing is mainly the main structure of the oil pad. Its shape is a large semicircle, and the upper end of the oil pad is a circular oil chamber 1 -1, there is an oil inlet 1-2 in the oil chamber, hydraulic oil flows into the oil chamber 1-1 through the oil inlet 1-2. The lower end of the oil pad is made into a thin cylindrical structure boss 1-3, and this boss is installed on the base 3. The total thickness of the oil pad is 18mm, the diameter of the outer circle is 300mm, the depth of the oil chamber is 7mm, the height of the boss is 3mm, and the diameter of the boss is 60mm.
工作原理：工作时将12个相同的油垫1均匀的布置在底座2上，油垫1带有弦长的边朝底座2的轴心设置，保证液压油向进油口供给时线路较短，然后将机床旋转工作台安装在可倾式圆形油垫上，当液压油通过进油口1-2输入到油腔1-1时，液压油在油腔1-1形成很大的压力，最终由于液压油的不断输入从而工作台被顶起，导致油垫与旋转工作台之间形成了一层薄油膜，机床旋转工作台和可倾式油垫1处于完全的流体润滑状态。通常当机床旋转工作台受到高速重载的时候，支承油膜厚度减小，发热量增加且工作台与底座2变形也变大，液压油甩油量加大，从而引起静压损失，严重时导致油垫1和机床旋转工作台直接接触形成干摩擦，进而出现摩擦失效。但是由于油垫1的下端加工有圆柱形凸台1-3的缘故，所以当油垫1在液压油压力作用下，它的圆周封油边会向下发生倾斜，这就导致了机床旋转工作台与可倾式油垫1之间产生了楔形，满足了动压形成条件，从而在静压基础上又产生动压，动压的增加量刚好补偿静压的损失量，达到动静压合理匹配的效果。有效的解决了静压支承过程中出现的摩擦失效，保证了静压推力轴承的有效运转，提高了加工精度。 Working principle: 12 identical oil pads 1 are evenly arranged on the base 2 during work, and the side of the oil pad 1 with the chord length is set toward the axis of the base 2 to ensure that the hydraulic oil is supplied to the oil inlet with a short circuit , and then install the rotary table of the machine tool on the tiltable circular oil pad. When the hydraulic oil is input into the oil chamber 1-1 through the oil inlet 1-2, the hydraulic oil will form a large pressure in the oil chamber 1-1. Finally, due to the continuous input of hydraulic oil, the table is lifted up, resulting in the formation of a thin oil film between the oil pad and the rotary table, and the rotary table of the machine tool and the tiltable oil pad 1 are in a complete fluid lubrication state. Usually, when the rotary table of a machine tool is subjected to high-speed and heavy loads, the thickness of the supporting oil film decreases, the calorific value increases, and the deformation of the table and the base 2 also increases, and the amount of hydraulic oil thrown away increases, resulting in static pressure loss, and in severe cases The oil pad 1 is in direct contact with the rotary table of the machine tool to form dry friction, and then friction failure occurs. However, because the lower end of the oil pad 1 is processed with a cylindrical boss 1-3, when the oil pad 1 is under the pressure of the hydraulic oil, its circumferential oil sealing edge will tilt downward, which causes the machine tool to rotate A wedge shape is formed between the platform and the tiltable oil pad 1, which satisfies the conditions for the formation of dynamic pressure, so that dynamic pressure is generated on the basis of static pressure, and the increase of dynamic pressure just compensates the loss of static pressure, achieving a reasonable match between dynamic and static pressure Effect. It effectively solves the friction failure in the process of static pressure support, ensures the effective operation of the static pressure thrust bearing, and improves the machining accuracy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520170075.4U CN204716760U (en) | 2015-03-25 | 2015-03-25 | A kind of tilting-type lubricating pad of round chamber hydrostatic thrust bearing |
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| CN201520170075.4U CN204716760U (en) | 2015-03-25 | 2015-03-25 | A kind of tilting-type lubricating pad of round chamber hydrostatic thrust bearing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333011A (en) * | 2015-12-02 | 2016-02-17 | 哈尔滨理工大学 | Static pressure supporting oil pad with Wang-word-shaped cavity |
| CN106439005A (en) * | 2016-12-07 | 2017-02-22 | 北京工业大学 | Circular hydrostatic turntable oil pad with oil sealing edge with circular arc grooves |
| CN106640970A (en) * | 2016-12-31 | 2017-05-10 | 北京工业大学 | Air cavity structure capable of weakening air film fluctuation |
-
2015
- 2015-03-25 CN CN201520170075.4U patent/CN204716760U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333011A (en) * | 2015-12-02 | 2016-02-17 | 哈尔滨理工大学 | Static pressure supporting oil pad with Wang-word-shaped cavity |
| CN106439005A (en) * | 2016-12-07 | 2017-02-22 | 北京工业大学 | Circular hydrostatic turntable oil pad with oil sealing edge with circular arc grooves |
| CN106439005B (en) * | 2016-12-07 | 2018-07-31 | 北京工业大学 | A kind of band arc groove sealing oil edge static pressure turntable circle lubricating pad |
| CN106640970A (en) * | 2016-12-31 | 2017-05-10 | 北京工业大学 | Air cavity structure capable of weakening air film fluctuation |
| CN106640970B (en) * | 2016-12-31 | 2019-02-15 | 北京工业大学 | An air cavity structure to weaken the fluctuation of air film |
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Granted publication date: 20151021 Termination date: 20160325 |
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