CN1719054A - No swirling flow dynamic pressure air float cylindrical bearing - Google Patents
No swirling flow dynamic pressure air float cylindrical bearing Download PDFInfo
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- CN1719054A CN1719054A CN 200510009739 CN200510009739A CN1719054A CN 1719054 A CN1719054 A CN 1719054A CN 200510009739 CN200510009739 CN 200510009739 CN 200510009739 A CN200510009739 A CN 200510009739A CN 1719054 A CN1719054 A CN 1719054A
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Abstract
An irrotational flow dynamic pressure gas-float thrust bearing relates to a high-speed super precision spiral flute dynamic pressure gas-float thrust bearing. The working surface of the cylinder bearing opens a spiral dynamic pressure slot. The slot cross-section adopts the slope transition to eliminate the whirlwind produced via the rectangular slot cross-section, so as to improve the dynamic pressure efficiency and increase the carrying capacity and the rigidity.
Description
Technical field
The present invention relates to a kind of spiral chute dynamic pressure air float cylindrical bearing, especially ultraprecise, ultra high speed bearing.
Background technique
At present, the dynamic pressure air float cylindrical bearing that uses in the engineering, as: the kinetic pressure air-float bearing of inner in gyro dynamic pressure motor bearing, high-speed electric expreess locomotive kinetic pressure air-float bearing of inner, the high-speed boosting pump etc., its trench cross section all adopts the rectangular cross-section, be that the groove root adopts right angle (Zhou Heng, Liu Yanzhu. " aero dynamic bearing principle and calculating ", Chemical Industry Press, 1981; The 7th piece-gas bearing .2002 of " mechanical design handbook " second volume the 4th edition, Chemical Industry Press.; The 40 piece of chapter 9 in " mechanical design handbook " Volume Four-gas bearing .2003 second edition, China Machine Press .).There is swirling flow in this bearing at the groove root, has reduced dynamic pressure efficient, has reduced bearing capacity and bearing rigidity, thereby has shortened bearing life relatively.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the above-mentioned technology, the dynamic pressure air float cylindrical bearing that does not have the swirling flow district in a kind of trench cross section is provided.
For achieving the above object, the technical solution used in the present invention is that the cross section employing windward side of dynamic pressure groove on the kinetic pressure air-float bearing of inner working surface is the trapezoid cross section of oblique line.
Described dynamic pressure trench cross-section is that leeward side is the trapezoid cross section of vertical line.
Described dynamic pressure trench cross-section is that leeward side is the trapezoid cross section of oblique line.
Described working surface is the inner cylindrical surface that has the dynamic pressure groove.
Described working surface is the external cylindrical surface that has the dynamic pressure groove.
Described dynamic pressure groove is left-handed spiral chute or right hand helix groove.
Described dynamic pressure groove is the herringbone spiral groove that the middle part communicates.
Described dynamic pressure groove is the herringbone spiral groove that the middle part does not communicate.
Described dynamic pressure groove is the herringbone spiral groove that the middle part communicates with straight trough.
Advantage of the present invention
(1) bearing load carrying capacity is higher by 6% than the dynamic pressure air float cylindrical bearing in rectangle groove cross section.
(2) bearing rigidity improves 7% than the dynamic pressure air float cylindrical bearing in rectangle groove cross section.
Description of drawings
Accompanying drawing 2 is to be processed with one-sided helical dynamic pressure groove 5 on working surface 4, and the Hand of spiral of one-sided helical dynamic pressure groove 5 is left-handed external cylindrical surface schematic representation, and heavy line 6 is the cross-sectional profile direction of one-sided helical dynamic pressure groove 5.
Accompanying drawing 4 is to be processed with one-sided helical dynamic pressure groove 11 on working surface 10, and the Hand of spiral of one-sided helical dynamic pressure groove 11 is the external cylindrical surface schematic representation of dextrorotation, and heavy line 12 is the cross-sectional profile direction of one-sided helical dynamic pressure groove 11.
Accompanying drawing 5 is the inner cylindrical surface schematic representation that are processed with the man type dynamic pressure groove 14 that communicates of middle part on working surface 13, and heavy line 15 is the cross-sectional profile direction of man type dynamic pressure groove 14.
Accompanying drawing 6 is the external cylindrical surface schematic representation that are processed with the man type dynamic pressure groove 17 that communicates of middle part on working surface 16, and heavy line 18 is the cross-sectional profile direction of man type dynamic pressure groove 17.
Accompanying drawing 11 is that windward side 34 is the trapezoid cross section schematic representation of vertical line for oblique line, leeward side 36 for dynamic pressure trench cross-section on the working surface 33, and arrow 35 is gas flow direction.
Accompanying drawing 12 is that windward side 38 is the trapezoid cross section schematic representation of oblique line for oblique line, leeward side 40 for dynamic pressure trench cross-section on the working surface 37, and arrow 39 is gas flow direction.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
By Fig. 1-Figure 12 as can be known, the present invention has the dynamic pressure groove on one of two working surfaces matching of dynamic pressure air float cylindrical bearing, and the cross section of dynamic pressure groove is that windward side is the trapezoid cross section of oblique line.
Described dynamic pressure trench cross-section is that leeward side is the trapezoid cross section of vertical line.
Described dynamic pressure trench cross-section is that leeward side is the trapezoid cross section of oblique line.
Described working surface is the inner cylindrical surface that has the dynamic pressure groove.
Described working surface is the external cylindrical surface that has the dynamic pressure groove.
Described dynamic pressure groove is left-handed spiral chute or right hand helix groove.
Described dynamic pressure groove is the herringbone spiral groove that the middle part communicates.
Described dynamic pressure groove is the herringbone spiral groove that the middle part does not communicate.
Described dynamic pressure groove is the herringbone spiral groove that the middle part communicates with straight trough.
Embodiment 1:
As shown in Figure 1, be processed with one-sided helical dynamic pressure groove 2, the Hand of spiral of one-sided helical dynamic pressure groove 2 is left-handed interior column working 1, is equipped with smooth external cylindrical surface, and the cross section of one-sided helical dynamic pressure groove 2 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 2:
As shown in Figure 2, be processed with one-sided helical dynamic pressure groove 5, the Hand of spiral of one-sided helical dynamic pressure groove 5 is that left-handed outer cylinder working surface 4 is equipped with smooth inner cylindrical surface, and the cross section of one-sided helical dynamic pressure groove 5 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 3:
As shown in Figure 3, be processed with one-sided helical dynamic pressure groove 8, the Hand of spiral of one-sided helical dynamic pressure groove 8 is that the interior column working 7 of dextrorotation is equipped with smooth external cylindrical surface, and the cross section of one-sided helical dynamic pressure groove 8 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 4:
As shown in Figure 4, be processed with one-sided helical dynamic pressure groove 11, the Hand of spiral of one-sided helical dynamic pressure groove 11 is that the outer cylinder working surface 10 of dextrorotation is equipped with smooth inner cylindrical surface, and the cross section of one-sided helical dynamic pressure groove 11 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 5:
As shown in Figure 5, the interior column working 13 that is processed with the man type dynamic pressure groove 14 that communicates of middle part is equipped with smooth external cylindrical surface, and the cross section of man type dynamic pressure groove 14 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 6:
As shown in Figure 6, the outer cylinder working surface 16 that is processed with the man type dynamic pressure groove 17 that communicates of middle part is equipped with smooth inner cylindrical surface, and the cross section of man type dynamic pressure groove 17 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 7:
As shown in Figure 7, the interior column working 19 that is processed with the man type dynamic pressure groove 20 that do not communicate of middle part is equipped with smooth external cylindrical surface, and the cross section of man type dynamic pressure groove 20 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 8:
As shown in Figure 8, the outer cylinder working surface 22 that is processed with the man type dynamic pressure groove 23 that do not communicate of middle part is equipped with smooth inner cylindrical surface, and the cross section of man type dynamic pressure groove 23 adopts as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 9:
As shown in Figure 9, the interior column working 25 that is processed with the man type dynamic pressure groove 26 that the middle part communicates with straight trough 28 is equipped with smooth external cylindrical surface, and the cross section employing of man type dynamic pressure groove 26 is as Figure 11 or shown in Figure 12 trapezoidal.
Embodiment 10:
As shown in Figure 10, the outer cylinder working surface 29 that is processed with the man type dynamic pressure groove 30 that the middle part communicates with straight trough 32 is equipped with smooth inner cylindrical surface, and the cross section employing of man type dynamic pressure groove 30 is as Figure 11 or shown in Figure 12 trapezoidal.
The design of dynamic pressure air float cylindrical bearing can be chosen parameters with reference to traditional design method, the windward side oblique line of trench cross-section is 0.6 in the ratio optimum value of the projected length of groove width direction and groove width, optional span is 0.2 to 0.8, and the approximate oblique line that also can adopt root to have fillet replaces.
Claims (9)
1. spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: the cross section of dynamic pressure groove is that windward side is the trapezoid cross section of oblique line on the working surface.
2. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described dynamic pressure trench cross-section is that leeward side is the trapezoid cross section of vertical line.
3. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described dynamic pressure trench cross-section is that leeward side is the trapezoid cross section of oblique line.
4. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described working surface is the inner cylindrical surface that has the dynamic pressure groove.
5. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described working surface is the external cylindrical surface that has the dynamic pressure groove.
6. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described dynamic pressure groove is left-handed spiral chute or right hand helix groove.
7. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described dynamic pressure groove is the herringbone spiral groove that the middle part communicates.
8. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described dynamic pressure groove is the herringbone spiral groove that the middle part does not communicate.
9. as claim 1 described spiral chute dynamic pressure air float cylindrical bearing, it is characterized in that: described dynamic pressure groove is the herringbone spiral groove that the middle part communicates with straight trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510009739 CN1719054A (en) | 2005-02-17 | 2005-02-17 | No swirling flow dynamic pressure air float cylindrical bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510009739 CN1719054A (en) | 2005-02-17 | 2005-02-17 | No swirling flow dynamic pressure air float cylindrical bearing |
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| Publication Number | Publication Date |
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| CN1719054A true CN1719054A (en) | 2006-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510009739 Pending CN1719054A (en) | 2005-02-17 | 2005-02-17 | No swirling flow dynamic pressure air float cylindrical bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244560A (en) * | 2013-05-16 | 2013-08-14 | 哈尔滨耦合动力工程技术中心有限公司 | Dynamic-static pressure air-floating bearing with zooming-structure molded lines |
| CN106438702A (en) * | 2016-11-22 | 2017-02-22 | 江苏工大金凯高端装备制造有限公司 | Aerostatic air-floating bearing |
| CN103244560B (en) * | 2013-05-16 | 2018-08-31 | 哈尔滨耦合动力工程技术中心有限公司 | Pantograph structure molded line dynamic and static pressure air-bearing |
| CN109826866A (en) * | 2019-01-21 | 2019-05-31 | 南京航空航天大学 | A kind of two-way spiral groove protection bearing arrangement |
-
2005
- 2005-02-17 CN CN 200510009739 patent/CN1719054A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244560A (en) * | 2013-05-16 | 2013-08-14 | 哈尔滨耦合动力工程技术中心有限公司 | Dynamic-static pressure air-floating bearing with zooming-structure molded lines |
| CN103244560B (en) * | 2013-05-16 | 2018-08-31 | 哈尔滨耦合动力工程技术中心有限公司 | Pantograph structure molded line dynamic and static pressure air-bearing |
| CN106438702A (en) * | 2016-11-22 | 2017-02-22 | 江苏工大金凯高端装备制造有限公司 | Aerostatic air-floating bearing |
| CN109826866A (en) * | 2019-01-21 | 2019-05-31 | 南京航空航天大学 | A kind of two-way spiral groove protection bearing arrangement |
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Owner name: HARBIN INSTITUTE OF TECHNOLOGY Free format text: FORMER OWNER: HARBIN INSTITUTE OF TECHNOLOGY; APPLICANT Effective date: 20060922 |
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Effective date of registration: 20060922 Address after: 150001 No. 92 West straight street, Harbin, Heilongjiang Applicant after: Harbin Institute of Technology Address before: 150001 No. 92 West straight street, Harbin, Heilongjiang Applicant before: Harbin Institute of Technology Co-applicant before: Yao Shaoming |
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