CN102954107B - High-rigidity double-line liquid hydrostatic bearing - Google Patents
High-rigidity double-line liquid hydrostatic bearing Download PDFInfo
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- CN102954107B CN102954107B CN201210542325.3A CN201210542325A CN102954107B CN 102954107 B CN102954107 B CN 102954107B CN 201210542325 A CN201210542325 A CN 201210542325A CN 102954107 B CN102954107 B CN 102954107B
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Abstract
The invention provides a high-rigidity double-line liquid hydrostatic bearing which is characterized in that two lines of hydrostatic oil chambers, an outer-side oil chamber (17) and an inner-side oil chamber (18) are arranged along the axial direction of the inner hole of a bearing (2), four outer-side oil grooves (22) are arranged along the peripheral direction of the outer-side oil chamber (17), four inner-side oil grooves (19) are arranged along the peripheral direction of the inner-side oil chamber (18) as well, the end of the bearing (2) is provided with an outer-side oil inlet hole (14) and an inner-side oil inlet hole (15), the outer-side oil inlet hole (14) is communicated with the outer-side oil grooves (22), and the inner-side oil inlet hole (15) is communicated with the inner-side oil grooves (19). The two double-line hydrostatic bearings (2) are arranged on the main shaft of a machine tool, and the two double-line hydrostatic bearings (2) are respectively arranged at thea front bearing end (4) and thea back bearing end (5) of a main shaft system of the machine tool to wholly form into a double-line four-support structure. The high-rigidity double-line liquid hydrostatic bearing has the characteristics of being wide in bearing area, large in support span, good in heat dispersion performance, high in the rigidity of the main shaft and the like.
Description
Technical field
The present invention relates to the spring bearing of machine tool rotary main shaft, especially a kind of high rigidity biserial hydrodynamic journal liquid polymers.
background technique:machine tool chief axis, as the parts of lathe core, is related to machine finish and machine stability, is that the part with the most worth exploration is concerned about in machine tool design and manufacture most.Hydrostatic bearing due to its have that rotating accuracy is high, stability of rotation, vibration are little, without wearing and tearing, be widely used in precision machine tool industry.In general machine tool design, the fore bearing of machine tool chief axis and rear bearing are all adopt single-row oil film supporting structure, when needing the rigidity increasing machine tool chief axis, realize often by the length increasing bearing oil groove, but when bearing oil groove length increases, hydraulic oil can be caused to fail to discharge in time and cause heat accumulation thus cause the sharply rising of bearing temperature.As everyone knows, temperature rise cross conference cause machine tool variety thus cause machine tool accuracy to decline, degradation problem under stability, this is avoiding greatly of machine tool design.Therefore, how to design a kind of hydrodynamic journal liquid polymers can ensure to prevent excessive temperature rise from being most important while it has high stiffness.
summary of the invention:the object of the invention is to hydrodynamic journal liquid polymers precision machine tool industry being provided to a kind of high rigidity and high stability, this bearing is while its oil film bearing length of increase, allow in the oil leak hole of section hydraulic oil timely from bearing between two oil pockets and discharge, have oil film loaded area wide, support that span is large, thermal diffusivity good, carrying rigidity high.
Formation of the present invention: a kind of high rigidity biserial hydrodynamic journal liquid polymers, it is characterized in that: at the static-pressure oil chamber axially having biserial of brearing bore, outside oil pocket and inner side oil pocket, outside oil pocket has four outside oil grooves in the circumferential, inner side oil pocket has four inner side oil grooves in the circumferential, have outside oil inlet hole and inner side oil inlet hole at bearing end, outside oil inlet hole communicates with outside oil groove; Inner side oil inlet hole communicates with inner side oil groove.
Bearing support comprises outside-supporting hole and medial support hole, and the diameter in medial support hole is slightly less than the diameter in outside-supporting hole.
Between outside-supporting hole and medial support hole, have draining annular groove, oil drainage hole is arranged at bottom.
Bearing comprises outside supporting neck and inner side supporting neck, and the diameter of inner side supporting neck is slightly less than the diameter of outside supporting neck.
Compared with prior art, the present invention has following features: while the oil film bearing length increasing bearing, allow in the oil leak hole of the hydraulic oil after work timely from bearing between two oil pockets and discharge, have oil film loaded area wide, support the feature that span is large, thermal diffusivity good, main shaft rigidity is high.
accompanying drawing illustrates:
Fig. 1 is biserial hydrodynamic journal liquid polymers installations diagram;
Fig. 2 is bearing block structure figure;
Fig. 3 is bearing shape assumption diagram;
Fig. 4 is Bearing inner structural drawing.
In figure 1, bearing support, 2, bearing, 3, oil inlet pipe, 4, front axle socket end, 5, rear axle socket end, 6, oil exit pipe, 7, outside-supporting hole, 8, auxiliary hole, 9, draining annular groove, 10, medial support hole, 11, oil drainage hole, 12, outside supporting neck, 13, inner side supporting neck, 14, outside oil inlet hole, 15, inner side oil inlet hole, 16, annular groove outside, 17, outside oil pocket, 18, inner side oil pocket, 19, inner side oil groove, 20, inner circle draining annular groove, 21, oil leak hole, 22, outside oil groove.
embodiment:
As Figure 1-4, a kind of high rigidity biserial hydrodynamic journal liquid polymers, it is characterized in that: at the static-pressure oil chamber axially having biserial of bearing 2 endoporus, outside oil pocket 17 and inner side oil pocket 18, outside oil pocket 17 has four outside oil grooves 22 in the circumferential, inner side oil pocket 18 has four inner side oil grooves 19 in the circumferential, and have outside oil inlet hole 14 and inner side oil inlet hole 15 in bearing 2 end, outside oil inlet hole 14 communicates with outside oil groove 22; Inner side oil inlet hole 15 communicates with inner side oil groove 19.
Bearing support 1 comprises outside-supporting hole 7 and medial support hole 10, and the diameter in medial support hole 10 is slightly less than the diameter in outside-supporting hole 7.
Between outside-supporting hole 7 and medial support hole 10, have draining annular groove 9, oil drainage hole 11 is arranged at bottom.
Bearing 2 comprises outside supporting neck 12 and inner side supporting neck 13, and the diameter of inner side supporting neck 13 is slightly less than the diameter of outside supporting neck 12.
The present invention can allow in the oil leak hole of section hydraulic oil timely from bearing between two oil pockets and discharge, have the advantages that oil film loaded area is wide, support span is large, thermal diffusivity good, main shaft rigidity is high, be widely used in the support of various precision machine rotary main shaft.Because the present invention carries out transformation to form in the structure of original machine tool chief axis, therefore only needing to carry out transformation to bearing and bearing support can realize, and avoids, from newly designing the expense brought, therefore having good economic benefit.
Claims (4)
1. one kind high rigidity biserial hydrodynamic journal liquid polymers, it is characterized in that: at the static-pressure oil chamber axially having biserial of bearing (2) endoporus, outside oil pocket (17) and inner side oil pocket (18), outside oil pocket (17) has four outsides oil groove (22) in the circumferential, inner side oil pocket (18) has four inner sides oil groove (19) in the circumferential, have outside oil inlet hole (14) and inner side oil inlet hole (15) in bearing (2) end, outside oil inlet hole (14) communicates with outside oil groove (22); Inner side oil inlet hole (15) communicates with inner side oil groove (19).
2. one according to claim 1 high rigidity biserial hydrodynamic journal liquid polymers, it is characterized in that: bearing support (1) comprises outside-supporting hole (7) and medial support hole (10), the diameter of medial support hole (10) is slightly less than the diameter of outside-supporting hole (7).
3. one according to claim 1 high rigidity biserial hydrodynamic journal liquid polymers, is characterized in that: between outside-supporting hole (7) and medial support hole (10), have draining annular groove (9), and oil drainage hole (11) is arranged at bottom.
4. one according to claim 1 high rigidity biserial hydrodynamic journal liquid polymers, it is characterized in that: bearing (2) comprises outside supporting neck (12) and inner side supporting neck (13), the diameter of inner side supporting neck (13) is slightly less than the diameter in outside supporting neck (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210542325.3A CN102954107B (en) | 2012-12-14 | 2012-12-14 | High-rigidity double-line liquid hydrostatic bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210542325.3A CN102954107B (en) | 2012-12-14 | 2012-12-14 | High-rigidity double-line liquid hydrostatic bearing |
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| Publication Number | Publication Date |
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| CN102954107A CN102954107A (en) | 2013-03-06 |
| CN102954107B true CN102954107B (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210542325.3A Active CN102954107B (en) | 2012-12-14 | 2012-12-14 | High-rigidity double-line liquid hydrostatic bearing |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106826547A (en) * | 2017-03-01 | 2017-06-13 | 新昌县华科机电设备有限公司 | A kind of cantilevered is combined hydrostatic pressure main shaft high |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2696746Y (en) * | 2004-04-23 | 2005-05-04 | 济南二机床集团有限公司 | Heavy load beared static pressure spindle bearing device |
| CN1621703A (en) * | 2003-11-28 | 2005-06-01 | 广东工业大学 | Machine tool electric main shaft realizing supporting float by adopting hydrostatic bearing |
| CN2735067Y (en) * | 2004-10-11 | 2005-10-19 | 李维谦 | Hybrid bearing |
| CN101579841A (en) * | 2009-06-17 | 2009-11-18 | 重庆大学 | Hydro-hybrid bearing used for grinding wheel main shaft of grinding machine |
| CN201944119U (en) * | 2011-01-26 | 2011-08-24 | 江西杰克机床有限公司 | Static-pressure bearing with internal-feedback throttling return oil |
| CN202381538U (en) * | 2011-12-29 | 2012-08-15 | 重庆机床(集团)有限责任公司 | Hydrostatic bearing structure for spindle |
| CN102797754A (en) * | 2012-08-28 | 2012-11-28 | 天津市第二机床有限公司 | Internal feedback hydrostatic bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215286U (en) * | 1987-12-30 | 1988-11-02 | 中国科学院长春光机所 | Fine edger with hydrostatic and photo-electrical center of gravity devices |
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2012
- 2012-12-14 CN CN201210542325.3A patent/CN102954107B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621703A (en) * | 2003-11-28 | 2005-06-01 | 广东工业大学 | Machine tool electric main shaft realizing supporting float by adopting hydrostatic bearing |
| CN2696746Y (en) * | 2004-04-23 | 2005-05-04 | 济南二机床集团有限公司 | Heavy load beared static pressure spindle bearing device |
| CN2735067Y (en) * | 2004-10-11 | 2005-10-19 | 李维谦 | Hybrid bearing |
| CN101579841A (en) * | 2009-06-17 | 2009-11-18 | 重庆大学 | Hydro-hybrid bearing used for grinding wheel main shaft of grinding machine |
| CN201944119U (en) * | 2011-01-26 | 2011-08-24 | 江西杰克机床有限公司 | Static-pressure bearing with internal-feedback throttling return oil |
| CN202381538U (en) * | 2011-12-29 | 2012-08-15 | 重庆机床(集团)有限责任公司 | Hydrostatic bearing structure for spindle |
| CN102797754A (en) * | 2012-08-28 | 2012-11-28 | 天津市第二机床有限公司 | Internal feedback hydrostatic bearing |
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| CN102954107A (en) | 2013-03-06 |
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