CN108775333B - Dynamic and static pressure bearing capable of being controlled online and control method thereof - Google Patents
Dynamic and static pressure bearing capable of being controlled online and control method thereof Download PDFInfo
- Publication number
- CN108775333B CN108775333B CN201810845374.1A CN201810845374A CN108775333B CN 108775333 B CN108775333 B CN 108775333B CN 201810845374 A CN201810845374 A CN 201810845374A CN 108775333 B CN108775333 B CN 108775333B
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- Prior art keywords
- bearing bush
- bearing
- static pressure
- cavity
- main shaft
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- 230000003068 static effect Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 46
- 238000009434 installation Methods 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000009347 mechanical transmission Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/02—Sliding-contact bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses an on-line controllable dynamic and static pressure bearing and a control method thereof, and relates to the technical field of mechanical transmission fluid bearings. The invention can solve the problem that the existing dynamic and static pressure bearing cannot work normally due to the fact that the clearance between the journal and the bearing bush cannot be adjusted by matching different rotating speeds of the main shaft, realize on-line control and adapt to different working conditions.
Description
Technical Field
The invention relates to the technical field of mechanical transmission fluid bearings, in particular to a dynamic and static pressure bearing capable of being controlled on line and a control method thereof.
Background
A hydrostatic bearing is a plain bearing capable of operating under both hydrostatic and hydrodynamic lubrication. The change of the rotating speed of the dynamic and static bearing in operation can influence the thickness of an oil film and the pressure of the oil film, so that the viscosity of oil is changed when the oil temperature is changed, wherein the clearance between the journal of a main shaft and a bearing bush is critical to the formation condition of a dynamic pressure oil film and is changed along with the change of working conditions. In actual production, the bearing is required to be changed within a large rotating speed range due to different workpiece types and grinding consumption, and the rotation precision and stability of the main shaft are required to be ensured, however, the clearance between the journal and the bearing bush of the existing dynamic and static pressure bearing is fixed when leaving the factory, the dynamic and static pressure bearing can only work within a small rotating speed range, the forming condition of an oil film can be changed due to the change of the rotating speed of the main shaft, and the bearing cannot work normally and is difficult to adapt to different working conditions.
Therefore, it is necessary to design a dynamic and static pressure bearing capable of adjusting the clearance between the journal and the bearing bush.
Disclosure of Invention
The invention aims to provide an on-line controllable dynamic and static pressure bearing and a control method thereof, which are used for solving the problem that the existing dynamic and static pressure bearing cannot work normally due to the fact that the clearance between a shaft neck and a bearing bush cannot be adjusted by matching different rotating speeds of a main shaft.
In order to achieve the above purpose, the technical scheme of the invention is to provide an on-line controllable dynamic and static pressure bearing, which comprises a main shaft, a radial adjusting ring, a shaft sleeve and a bearing bush, wherein the shaft sleeve is arranged on the periphery of the main shaft in a matched manner, the radial adjusting ring is arranged on the periphery of the shaft sleeve in a matched manner, a rotating cavity is arranged on the inner side of the radial adjusting ring, a bearing bush mounting groove is formed in the shaft sleeve, the bearing bush is arranged in the bearing bush mounting groove and tangent with the side wall of the rotating cavity, and the width of the rotating cavity is gradually reduced along the anticlockwise direction.
As the preferable technical scheme, an oil cavity is formed between the inner cambered surface of the bearing bush and the main shaft, and the outer cambered surface of the bearing bush is contacted with the side wall of the rotating cavity.
As the preferable technical scheme, the bearing bush is provided with an oil inlet, and the oil inlet is communicated with the oil cavity.
As a preferable technical scheme, the side wall of the rotating cavity is an Archimedes spiral surface.
As a preferable technical scheme, the radial adjusting ring is connected with a rotating block in the rotating oil cylinder through a connecting pin.
As an optimal technical scheme, the shaft sleeve is connected with the rotary oil cylinder through a locating pin.
As the preferable technical scheme, the bearing bush mounting grooves are uniformly distributed in the circumference of the shaft sleeve, and the bearing bush mounting grooves correspond to the bearing bushes and the rotating cavity one by one.
The control method of the dynamic and static pressure bearing capable of being controlled on line comprises the following steps: the radial adjusting ring is driven by a rotating block in the rotating oil cylinder to rotate at a rated rotating speed, and the main shaft is driven by power to rotate; the lubricating oil between the bearing bush and the main shaft forms an oil film under the condition of relative motion; when the radial adjusting ring is driven by the rotary oil cylinder to rotate clockwise, the contact point of the bearing bush and the rotary cavity moves anticlockwise, and the width of the rotary cavity gradually decreases along the anticlockwise direction, so that the gap between the bearing bush and the main shaft is reduced, and the thickness of an oil film is correspondingly reduced; when the radial adjusting ring is driven by the rotary oil cylinder to rotate anticlockwise, the contact point of the bearing bush and the rotary cavity moves clockwise, and the gap between the bearing bush and the main shaft is enlarged as the width of the rotary cavity is gradually increased along the clockwise direction, so that the thickness of an oil film is correspondingly increased.
The invention has the following advantages:
(1) The dynamic and static pressure bearing capable of being controlled on line can realize on-line control of the gap between the bearing bush and the main shaft and on-line adjustment of oil film thickness and oil film pressure;
(2) The online-controllable dynamic-static pressure bearing provided by the invention can be suitable for working conditions of different workpiece types and grinding dosage, and has strong applicability;
(3) The on-line controllable dynamic and static pressure bearing has the characteristics of long service life, high precision and high stability;
(4) The dynamic and static pressure bearing provided by the invention can realize the technological requirement that the gap between the main shaft and the bearing bush is required to be regulated and controlled on line after the viscosity of an oil film is changed due to the change of the rotating speed or the temperature;
(5) The dynamic and static pressure bearing provided by the invention can keep the radial position of the main shaft unchanged when the thickness of an oil film is adjusted on line.
Drawings
FIG. 1 is a radial cross-sectional view of an on-line controllable dynamic and static pressure bearing provided by the invention.
Fig. 2 is an axial sectional view of an on-line controllable dynamic and static pressure bearing provided by the invention.
In the figure: radial adjusting ring 1, axle sleeve 2, axle bush 3, rotatory chamber 4, inlet port 5, oil pocket 6, main shaft 7, rotatory hydro-cylinder 8, locating pin 9, rotatory piece 10, connecting pin 11.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
Referring to fig. 1, the present embodiment provides an on-line controllable dynamic and static pressure bearing, which comprises a main shaft 7, a radial adjusting ring 1, a shaft sleeve 2 and a bearing bush 3, wherein the shaft sleeve 2 is installed on the periphery of the main shaft 7 in a matched manner, the radial adjusting ring 1 is installed on the periphery of the shaft sleeve 2 in a matched manner, a rotating cavity 4 is arranged on the inner side of the radial adjusting ring 1, a bearing bush installation groove is formed in the shaft sleeve 2, the bearing bush 3 is installed in the bearing bush installation groove and is tangent to the side wall of the rotating cavity 4, and the number of the bearing bushes 3 in the present embodiment includes but is not limited to 4.
Further, referring to fig. 2, the shaft sleeve 2 is mounted on the equipment rack, the radial adjusting ring 1 is connected with the rotating block 10 in the rotating cylinder 8 through the connecting pin 11, and the shaft sleeve 2 is connected with the rotating cylinder 8 through the positioning pin 9, so that the radial adjusting ring 1 can rotate along with the rotation of the rotating block 10 in the rotating cylinder 8.
Further, the width of the rotating chamber 4 gradually decreases along the counterclockwise direction, the side wall of the rotating chamber 4 is an archimedes spiral surface, which is a surface composed of innumerable archimedes spiral lines, and the archimedes spiral line is also called as a constant-speed spiral line, namely: when a point P moves along a moving ray OP at a constant speed, the ray rotates around the point O at an equal angular speed, and the track of the point P is called an Archimedean spiral.
Further, an oil cavity 6 is formed between the inner cambered surface of the bearing bush 3 and the main shaft 7, an oil inlet hole 5 is formed in the bearing bush 3, the oil inlet hole 5 is communicated with the oil cavity 6 and used for guaranteeing the quantity of lubricating oil in a bearing, and the outer cambered surface of the bearing bush 3 is contacted with the side wall of the rotating cavity 4, so that the bearing bush 3 can move along with the rotation of the radial adjusting ring 1, and the gap between the bearing bush 3 and the main shaft 7 is reduced or increased.
Further, the bearing bush mounting grooves are uniformly distributed in the circumference of the shaft sleeve 2, the bearing bush mounting grooves correspond to the bearing bushes 3 one by one, the bearing bushes 3 correspond to the rotating cavities 4 one by one, and the symmetrical and uniform positions are arranged, so that the uniform distribution of oil film pressure and thickness can be ensured.
The embodiment provides a control method of an on-line controllable dynamic and static pressure bearing, which comprises the following steps:
the radial adjusting ring 1 is driven by a rotating block 10 in the rotating oil cylinder 8 to rotate at a rated rotation speed, and the main shaft 7 is driven by power to rotate; the lubricating oil between the bearing bush 3 and the main shaft 7 forms an oil film under the condition of relative motion; when the radial adjusting ring 1 is driven by the rotary oil cylinder 8 to rotate clockwise, the contact point of the bearing bush 3 and the rotary cavity 4 moves anticlockwise, and the width of the rotary cavity 4 gradually decreases along the anticlockwise direction, so that the gap between the bearing bush 3 and the main shaft 7 is reduced, and the thickness of an oil film is correspondingly reduced; when the radial adjusting ring 1 is driven by the rotary oil cylinder 8 to rotate anticlockwise, the contact point of the bearing bush 3 and the rotary cavity 4 moves clockwise, and the gap between the bearing bush 3 and the main shaft 7 is increased due to the gradual increase of the width of the rotary cavity 4 along the clockwise direction, so that the oil film thickness is correspondingly increased. Meanwhile, the oil film pressure also changes along with the change of the gap between the bearing bush 3 and the main shaft 7, so that the online control is truly realized, and the high precision, the high stability and the long service life of the dynamic and static pressure bearing are realized.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (7)
1. The on-line controllable dynamic and static pressure bearing is characterized by comprising a main shaft (7), a radial adjusting ring (1), a shaft sleeve (2) and a bearing bush (3), wherein the shaft sleeve (2) is installed on the periphery of the main shaft (7) in a matched mode, the radial adjusting ring (1) is installed on the periphery of the shaft sleeve (2) in a matched mode, a rotary cavity (4) is arranged on the inner side of the radial adjusting ring (1), a bearing bush installation groove is formed in the shaft sleeve (2), the bearing bush (3) is installed in the bearing bush installation groove and tangent to the side wall of the rotary cavity (4), and the width of the rotary cavity (4) is gradually reduced along the anticlockwise direction;
the radial adjusting ring (1) is connected with a rotating block (10) in the rotating oil cylinder (8) through a connecting pin (11); the number of bearing bushes (3) comprises 4.
2. An on-line controllable dynamic and static pressure bearing as claimed in claim 1, characterized in that an oil cavity (6) is formed between the intrados of the bearing bush (3) and the main shaft (7), and the extrados of the bearing bush (3) is in contact with the side wall of the rotating cavity (4).
3. An on-line controllable dynamic and static pressure bearing as claimed in claim 2, characterized in that the bearing bush (3) is provided with an oil inlet (5), and the oil inlet (5) is communicated with the oil cavity (6).
4. An on-line controllable dynamic and static pressure bearing as claimed in claim 1, characterized in that the side wall of the rotating chamber (4) is an archimedes spiral surface.
5. An on-line controllable dynamic and static pressure bearing according to claim 1, characterized in that the shaft sleeve (2) is connected with the rotary cylinder (8) by a locating pin (9).
6. An on-line controllable dynamic and static pressure bearing as claimed in claim 1, characterized in that the bearing bush mounting grooves are uniformly distributed in the circumference of the shaft sleeve (2), and the bearing bush mounting grooves are in one-to-one correspondence with the bearing bush (3) and the bearing bush (3) with the rotating cavity (4).
7. A method of controlling an on-line controllable hybrid bearing according to claims 1-6, wherein the method comprises:
a rotating block (10) in the rotating oil cylinder (8) drives the radial adjusting ring (1) to rotate at a rated rotating speed in a certain range, and the main shaft (7) rotates under the drive of power; the lubricating oil between the bearing bush (3) and the main shaft (7) forms a dynamic pressure oil film under the condition of relative motion; when the radial adjusting ring (1) is driven by the rotary oil cylinder (8) to rotate clockwise, the contact point of the bearing bush (3) and the rotary cavity (4) moves anticlockwise, and as the width of the rotary cavity (4) is gradually reduced along the anticlockwise direction, the gap between the bearing bush (3) and the main shaft (7) is reduced, and the oil film thickness is correspondingly reduced; when the radial adjusting ring (1) is driven by the rotary oil cylinder (8) to rotate anticlockwise, the contact point of the bearing bush (3) and the rotary cavity (4) moves clockwise, the width of the rotary cavity (4) is gradually increased along the clockwise direction, the gap between the bearing bush (3) and the main shaft (7) is increased, and the oil film thickness is correspondingly increased.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845374.1A CN108775333B (en) | 2018-07-27 | 2018-07-27 | Dynamic and static pressure bearing capable of being controlled online and control method thereof |
| PCT/CN2019/079169 WO2020019742A1 (en) | 2018-07-27 | 2019-03-22 | On-line controllable hybrid bearing and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845374.1A CN108775333B (en) | 2018-07-27 | 2018-07-27 | Dynamic and static pressure bearing capable of being controlled online and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108775333A CN108775333A (en) | 2018-11-09 |
| CN108775333B true CN108775333B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810845374.1A Active CN108775333B (en) | 2018-07-27 | 2018-07-27 | Dynamic and static pressure bearing capable of being controlled online and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108775333B (en) |
| WO (1) | WO2020019742A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775333B (en) * | 2018-07-27 | 2024-03-08 | 贵州伟昭科技有限责任公司 | Dynamic and static pressure bearing capable of being controlled online and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH331640A (en) * | 1956-03-23 | 1958-07-31 | Gambin & Co Soc A Resp Limitee | Adjustable bearing for sliding shaft |
| US3934948A (en) * | 1973-07-20 | 1976-01-27 | Regie Nationale Des Usines Renault | Self-pressurizing and self-compensating hydrostatic bearing |
| JP2001200847A (en) * | 1999-11-08 | 2001-07-27 | Mitsubishi Heavy Ind Ltd | Bearing device and turbine |
| DE102012107857A1 (en) * | 2011-08-26 | 2013-02-28 | Johnson Controls Gmbh | Bearing bush for seat of motor vehicle, has asymmetrically acting spring unit that is arranged on collar of sleeve portion corresponding to longitudinal axis |
| CN204556260U (en) * | 2015-05-11 | 2015-08-12 | 人本集团有限公司 | Oil bath lubrication bearing tester axial load seat board and radial load seat board |
| CN105805159A (en) * | 2016-05-06 | 2016-07-27 | 山东大学 | Hydrostatic sliding bearing with one or more movable pads |
| CN107989900A (en) * | 2017-12-22 | 2018-05-04 | 上海理工大学 | A kind of dynamic pressure cylinder revolute pair |
| CN210141272U (en) * | 2018-07-27 | 2020-03-13 | 贵州伟昭科技有限责任公司 | Hybrid bearing capable of being controlled on line |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016098888A (en) * | 2014-11-20 | 2016-05-30 | 三菱重工業株式会社 | Tilting pad bearing |
| SE539384C2 (en) * | 2015-12-11 | 2017-09-05 | Hudiksvalls Teknik Centrum Ab | Storage arrangement for a high-pressure rotatable unit operating |
| CN106369050B (en) * | 2016-09-13 | 2018-11-09 | 安徽工程大学 | A kind of magnetic suspension aero dynamic bearing |
| CN106763190B (en) * | 2017-02-16 | 2018-12-11 | 西安建筑科技大学 | A kind of intelligent dynamic and hydrostatic bearing based on negative poisson's ratio structure |
| CN108775333B (en) * | 2018-07-27 | 2024-03-08 | 贵州伟昭科技有限责任公司 | Dynamic and static pressure bearing capable of being controlled online and control method thereof |
-
2018
- 2018-07-27 CN CN201810845374.1A patent/CN108775333B/en active Active
-
2019
- 2019-03-22 WO PCT/CN2019/079169 patent/WO2020019742A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH331640A (en) * | 1956-03-23 | 1958-07-31 | Gambin & Co Soc A Resp Limitee | Adjustable bearing for sliding shaft |
| US3934948A (en) * | 1973-07-20 | 1976-01-27 | Regie Nationale Des Usines Renault | Self-pressurizing and self-compensating hydrostatic bearing |
| JP2001200847A (en) * | 1999-11-08 | 2001-07-27 | Mitsubishi Heavy Ind Ltd | Bearing device and turbine |
| DE102012107857A1 (en) * | 2011-08-26 | 2013-02-28 | Johnson Controls Gmbh | Bearing bush for seat of motor vehicle, has asymmetrically acting spring unit that is arranged on collar of sleeve portion corresponding to longitudinal axis |
| CN204556260U (en) * | 2015-05-11 | 2015-08-12 | 人本集团有限公司 | Oil bath lubrication bearing tester axial load seat board and radial load seat board |
| CN105805159A (en) * | 2016-05-06 | 2016-07-27 | 山东大学 | Hydrostatic sliding bearing with one or more movable pads |
| CN107989900A (en) * | 2017-12-22 | 2018-05-04 | 上海理工大学 | A kind of dynamic pressure cylinder revolute pair |
| CN210141272U (en) * | 2018-07-27 | 2020-03-13 | 贵州伟昭科技有限责任公司 | Hybrid bearing capable of being controlled on line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108775333A (en) | 2018-11-09 |
| WO2020019742A1 (en) | 2020-01-30 |
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