CN201627825U - Water lubrication dynamic and static pressure ladder groove step bearing - Google Patents
Water lubrication dynamic and static pressure ladder groove step bearing Download PDFInfo
- Publication number
- CN201627825U CN201627825U CN2009202448657U CN200920244865U CN201627825U CN 201627825 U CN201627825 U CN 201627825U CN 2009202448657 U CN2009202448657 U CN 2009202448657U CN 200920244865 U CN200920244865 U CN 200920244865U CN 201627825 U CN201627825 U CN 201627825U
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- bearing
- ladder
- shaped groove
- groove
- annular groove
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Abstract
The utility model relates to a water lubrication dynamic and static pressure ladder groove step bearing, which comprises a bearing bush and a main shaft arranged in the bearing bush. The inner wall of the bearing bush which is also the oil sealing surface of a bearing is provided with an annular ladder-shaped groove; the bearing bush is separated into a plurality of mutually communicated areas by the annular ladder-shaped groove; the annular ladder-shaped groove is internally provided with shallow cavities; and the bearing bush is also provided with oil inlet holes and cooling holes which are both communicated with the annular ladder-shaped groove. The oil sealing surface of the bearing is provided with the ladder-shaped deep groove for dividing the surface of the bearing into a plurality of areas, and the shallow cavities with depth less than that of the groove are arranged in the areas surrounded by the ladder-shaped groove. The shallow cavities surrounded by the ladder-shaped groove can enhance the dynamic pressure and improve the bearing capability and rigidity of the bearing. A plurality of oil supply holes and cooling holes are arranged in the ladder-shaped groove so that high-pressure lubricating medium can be pumped into the gaps of the bearing through the small holes, the flow rate of the surface of the bearing bush is improved, the temperature raising is reduced, and the continuity of the oil film is ensured.
Description
Technical field
The utility model relates to a kind of high-speed main spindle spring bearing, especially can improve at a high speed for high-speed main spindle, the water lubrication dynamic and static pressure ladder groove step bearing of stable and low temperature rise.
Background technique
Existing high-speed slide bearing mainly contains following a few class: one, spiral chute oil pocket (M Tomio, NTakashi, I Fumihiro.Development and performance test forhigh-speed spindle with water lubricated hybrid journal bearing[J] .Nihon kikai gakkai nenji taikai koen ronbunshu, 2001,3 (1): 211-212.Yoshimoto, S.Kume.Axial load capacity of water-lubricatedhydrostatic conical bearings with spiral grooves for high speedspindles[J] .Tribology international, 1998,31 (6): 331-338.), be mainly used in the situation that radial and axial load is arranged simultaneously; Two, no chamber dynamic and hydrostatic bearing (SC Sharma, V Kumar, SC Jain, et al.Thermohydrostatic analysis of slot-entryhybrid journal bearing[J] .Tribology Internat ional, 2002,35 (9): 561-577.WP Jones, BE Launder.The calculat ion of low reynoldsnumber phenomena with a two-equat ion model of turbulence[J] .International Journal of Heat Mass Transfer, 1973,16 (6): 1119-1130.), this structure is to study a more class formation in recent years, dynamic pressure effect is big, support but lack static pressure, must under large eccentricity, work, so spindle rotation accuracy is low; Three, shallow oil pocket dynamic and hydrostatic bearing (CH Chen, Y Kang, YP Chang, et al.Influence of restrictor onstability of the rigid rotor-hybrid bearing system[J] .Journal ofSound and Vibration, 2006,297 (3-5): 635-648. open inferior guest. high-speed machine tool water lubrication dynamic and static pressure design bearing research [D]. and Xi'an: Xi'an Communications University, 2008:1-6.), the high speed and precision main shaft is used this class bearing more, bearing capacity is big, the rigidity height, and processing is easier to, but temperature rise is higher, and stability is lower; Four, the annular groove ladder bearing (is worn and is climbed, Zhang Yabin, Xu Hua. novel high speed milling spindle water lubrication dynamic and hydrostatic bearing structure and performance study [J]. lubricated and sealing, 2009,2 (1): 11-24.), be a kind of structure-improved of stepped cavity bearing, have the advantages that flow is big, temperature rise is low, other performances and stepped cavity bearing are similar.
But there is various problems in above these main shafts aspect the high speed and precision main shaft support of high-speed slide:
(1) high-speed working condition is general down adopts the low viscosity lubricant medium, because dielectric viscosity is lower, can produce serious turbulent phenomenon when spindle speed is higher, friction phenomenon aggravation in the lubricant medium, and bearing temperature rise increases.
(2) breaking appears in the lubricating film of high-speed working condition properties of journal bearing lubricated easily, causes that cavitation phenomenon appears in lubricant medium inside, reduces the reliability of bearing.
(3) film stability of high-speed working condition properties of journal bearing lubricated reduces, and the bearing working state labile enters the oil whip state easily, causes spindle axis position unstability, even causes accident.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, provides a kind of and can reduce bearing temperature rise, improves the oil film reliability of bearing, improves the water lubrication dynamic and static pressure ladder groove step bearing of bearing stability.
For achieving the above object, the technical solution adopted in the utility model is: comprise bearing shell and be arranged on the interior main shaft of bearing shell, it is characterized in that: the inwall at bearing shell is to offer the annular groove that is trapezium structure on the bearing oil sealing surface, the annular groove that is trapezium structure is separated into some zones that are interconnected with bearing shell, and in the annular groove of trapezium structure, offer shallow chamber, and on bearing shell, also offer oil inlet hole and the cooling hole that is connected with the annular groove of trapezium structure.
The degree of depth of the annular groove of trapezium structure of the present utility model is greater than the degree of depth in shallow chamber.
In order to solve the technical requirements that the high speed and precision main shaft support needs at a high speed, hangs down temperature rise and high stability, water lubrication dynamic and static pressure ladder groove step bearing of the present utility model is provided with the deep trouth of " ladder " shape on the bearing oil sealing surface, with bearing surface zoning territory, in the zone that terraced groove surrounds the degree of depth shallow chamber little than groove.The effect that strengthens dynamic pressure is played in the shallow chamber that the ladder groove surrounds, and improves the bearing capacity and the rigidity of bearing.In terraced groove, there are some oil supply holes and cooling hole, the high-tension lubrication medium can be squeezed into the bearing play by these apertures, improve bearing shell surface flow, reduce temperature rise, guarantee the oil film continuity.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present utility model, and wherein Fig. 1 a is a plan view, and Fig. 1 b is the unfolded drawing of the utility model bearing shell;
Fig. 2 is the Distribution of temperature rise figure of the utility model bearing;
Fig. 3 is that the utility model bearing is 0.5 o'clock pressure circle of equal altitudes in eccentricity;
Fig. 4 is that the whirling motion of the utility model bearing boundary is than square figure.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to Fig. 1, comprise bearing shell 1 and be arranged on main shaft 2 in the bearing shell 1, inwall at bearing shell 1 is to offer the annular groove 3 that is trapezium structure on the bearing oil sealing surface, the annular groove 3 of this trapezium structure is separated into some zones that are interconnected with bearing shell, and in the annular groove 3 of trapezium structure, offer the shallow chamber 4 of the degree of depth, and on bearing shell 1, also offer oil inlet hole 5 and the cooling hole 6 that is connected with the annular groove 3 of trapezium structure less than annular groove 3.
This model utility has following three advantages:
One, reduces bearing outlet temperature rise
The axial oil sealing surface 7 that the annular groove 3 of trapezium structure is stronger with dynamic pressure effect is divided into two-part, forms the hydrostatic bearing structure that is similar to center oil ring fuel feeding, has reduced the dynamic pressure effect on the axial oil sealing surface 7, can reduce friction power loss.Simultaneously, the cooling hole 6 in the annular groove 3 of trapezium structure has improved the flow on bearing shell surface, and the bearing shell surface temperature rise is descended.
Fig. 2 is ladder groove step bearing Distribution of temperature rise figure under the adiabatic condition that is obtained by the bearing computer program.By Distribution of temperature rise as can be seen, obviously temperature rise on every side is low in the temperature rise of the annular groove 3 of trapezium structure in the ladder bearing, because the water that flows out in the water in the annular groove 3 of trapezium structure and the oil pocket fully mixes in the annular groove 3 of trapezium structure, temperature rise on the axial oil sealing surface 7 is descended rapidly, and bearing outlet temperature rise is effectively controlled.
Two, prevent rupture of oil film
The annular groove 3 of trapezium structure makes bearing of the present utility model can effectively improve the critical eccentricity of rupture of oil film.In high speed water lubrication dynamic and static pressure stepped cavity bearing operation process, the pressure gradient of lubricant film is very big, when higher or axle journal eccentricity is big when spindle speed, the rupture of oil film phenomenon very easily occurs.The low pressure hole can occur in rupture of oil film place, this is because upstream lubricant medium flow is limited, can't be full of fully that the space causes.The hole can cause the cavitation erosion of bearing shell surface, shortens bearing life, in order to prevent the generation of cavitation, generally only restricted spindle speed or reduction spindle eccentricity rate.
As Fig. 3, even be 0.5 o'clock in eccentricity, the utility model also can improve flow in the zone that originally can occur cavitating, and reduces pressure gradient, avoids rupture of oil film, illustrates that the utility model can improve the critical eccentricity of rupture of oil film.
Three, improve bearing stability
High-speed main spindle is very high to the requirement of stability, is in when main shaft under the operating mode that runs up, if bearing stability is low excessively, can cause the oil film unstability, causes the spindle axis high vibration, causes accident.
Bearing stability can be by the boundary whirling motion than square estimation, the boundary whirling motion than square be unstability angular velocity and operating angle speed ratio square, it is stable more that this is worth more little bearing.The boundary whirling motion of bearing of the present utility model has stability preferably than square very little as shown in Figure 4.
Claims (2)
1. water lubrication dynamic and static pressure ladder groove step bearing, comprise bearing shell (1) and be arranged on the interior main shaft (2) of bearing shell (1), it is characterized in that: the inwall at bearing shell (1) is to offer the annular groove (3) that is trapezium structure on the bearing oil sealing surface, the annular groove (3) that is trapezium structure is separated into some zones that are interconnected with bearing shell, and in the annular groove (3) of trapezium structure, offer shallow chamber (4), and on bearing shell (1), also offer oil inlet hole (5) and the cooling hole (6) that is connected with the annular groove (3) of trapezium structure.
2. water lubrication dynamic and static pressure ladder groove step bearing according to claim 1 is characterized in that: the degree of depth of the annular groove of said trapezium structure (3) is greater than the degree of depth of shallow chamber (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202448657U CN201627825U (en) | 2009-10-23 | 2009-10-23 | Water lubrication dynamic and static pressure ladder groove step bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202448657U CN201627825U (en) | 2009-10-23 | 2009-10-23 | Water lubrication dynamic and static pressure ladder groove step bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201627825U true CN201627825U (en) | 2010-11-10 |
Family
ID=43059219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202448657U Expired - Lifetime CN201627825U (en) | 2009-10-23 | 2009-10-23 | Water lubrication dynamic and static pressure ladder groove step bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201627825U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696714B (en) * | 2009-10-23 | 2012-07-04 | 西安交通大学 | Water lubrication dynamic and static pressure ladder groove step bearing |
| CN108105257A (en) * | 2017-12-12 | 2018-06-01 | 大连理工大学 | A kind of H-shaped shallow cavity hybrid water lubrication journal bearing for being equipped with circumferential communication groove |
| CN114183392A (en) * | 2021-11-10 | 2022-03-15 | 江苏大学 | Water lubrication bearing suitable for sea water desalination energy recovery all-in-one |
-
2009
- 2009-10-23 CN CN2009202448657U patent/CN201627825U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696714B (en) * | 2009-10-23 | 2012-07-04 | 西安交通大学 | Water lubrication dynamic and static pressure ladder groove step bearing |
| CN108105257A (en) * | 2017-12-12 | 2018-06-01 | 大连理工大学 | A kind of H-shaped shallow cavity hybrid water lubrication journal bearing for being equipped with circumferential communication groove |
| CN108105257B (en) * | 2017-12-12 | 2019-05-28 | 大连理工大学 | A kind of H-shaped shallow cavity hybrid water lubrication transverse bearing equipped with circumferential communication groove |
| CN114183392A (en) * | 2021-11-10 | 2022-03-15 | 江苏大学 | Water lubrication bearing suitable for sea water desalination energy recovery all-in-one |
| CN114183392B (en) * | 2021-11-10 | 2024-03-19 | 江苏大学 | Water lubrication bearing suitable for sea water desalination energy recovery all-in-one |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101110 Effective date of abandoning: 20091023 |
|
| RGAV | Abandon patent right to avoid regrant |