CN102861927B - Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing - Google Patents
Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing Download PDFInfo
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- CN102861927B CN102861927B CN201210361483.9A CN201210361483A CN102861927B CN 102861927 B CN102861927 B CN 102861927B CN 201210361483 A CN201210361483 A CN 201210361483A CN 102861927 B CN102861927 B CN 102861927B
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- main shaft
- annular
- electric main
- sliding bearing
- speed electric
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Abstract
The invention discloses a super-high-speed electric main shaft sealing structure adopting a water lubricating static pressure bearing. The super-high-speed electric main shaft sealing structure comprises a sliding bearing which is sleeved on an electric main shaft which stretches out of a motor rotor, wherein the electric main shafts at the two ends of the sliding bearing are sleeved with front and back symmetrical gas sealing covers and are fastened with the two ends of the sliding bearing; the super-high-speed electric main shaft sealing structure is characterized in that the sliding bearing is internally provided with a gas inlet channel and a water discharging channel; an annular gas pressure sealing device, which is communicated with the outer part through the gas inlet channel, is arranged between each gas sealing cover and the electric main shaft; a gas blowing channel is formed by a gap between the gas sealing cover and the electric main shaft; annular multi-grade water returning grooves are symmetrically arranged at the axial two ends of the inner wall of the sliding bearing; and the annular multi-grade water returning grooves are communicated with the outer part through the water discharging channel.
Description
Technical field
The present invention relates to the main shaft seal of a kind of high-speed electric expreess locomotive, relate in particular to a kind of water lubrication dynamic and hydrostatic bearing hermetically-sealed construction that adopts assembled in motor formula electricity main shaft.
Background technology
The designing and manufacturing level of High Speed NC Machine Tools has determined the whole manufacturing level of China, and the core component of Modern High-Speed Digit Control Machine Tool is exactly high-speed electric main shaft device, and the height of its performance directly has influence on machine tool high speed precise processing precision.Adopt the structure tool of assembled in motor formula water lubrication dynamic and static piezoelectricity main shaft to have the following advantages: the one, compact conformation, weight saving; The 2nd, shaft strength situation is better, is difficult for causing load unbalance loading, and precision is higher.Electricity main shaft does gyration under the support of water lubrication dynamic and hydrostatic bearing oil film, bears fluid dynamic and hydrostatic comprehensive function, has the advantages such as rigidity is large, damping is little, the life-span is long, high speed performance is good.Owing to adopting water as lubricant medium, its viscosity is more oily low, and inner frictional force is less, and under main shaft ultrahigh speed is rotated, power consumption is lower, and therefore caloric value is little, and temperature rise is low, and support stiffness is high, good cooling results, has created condition for improving the speed of mainshaft.
But, owing to adopting water as lubricant medium, if lubricant medium water leaks in electric spindle motor, easily cause corrosion and insulation damages, may cause major accident, therefore ensure that lubricant medium water is not leaked in motor and outside main shaft, be one of key of water lubrication electricity spindle design.Existing sealing structure unit has bleeder sealing device, mainly utilizes vacuum air pump to form negative pressure at drainage channel place, and the lubricant medium water leaking is introduced in recovery tank.But there is the insecure problem of sealing in this hermetically-sealed construction, particularly, under electric main shaft ultrahigh speed working order, sealing effectiveness is unsatisfactory.
Summary of the invention
The high-speed motorized spindles the object of the invention is to for adopting water lubrication dynamic and hydrostatic bearing proposes a kind of hermetically-sealed construction that can carry out to the lubricant medium water leaking reliable effective sealing.This structure can realize simultaneously and stop the water leaking enter motor internal space and prevent that the impurity of main shaft space outerpace from entering high-speed motorized spindles inside, thereby the reliable environment of motor safety operation is provided.
In order to achieve the above object, the present invention adopts following technical proposals to be achieved:
A kind of high-speed electric main shaft hermetically-sealed construction that adopts water lubrication dynamic and hydrostatic bearing, comprise the sliding bearing being set on the electric main shaft that stretches out rotor, the sealing gland lid of symmetry before and after being set with on the electric main shaft at sliding bearing two ends, and fastening with sliding bearing two ends, it is characterized in that: in sliding bearing, be provided with inlet channel and drainage channel, between each sealing gland lid and electric main shaft, be provided with by inlet channel and the outside annular pneumatic sealing device being communicated with, the gap between sealing gland lid and electric main shaft forms insufflation channel; At the axial two ends of sliding bearing inwall, symmetry offers annular multistage return flume, and the multistage return flume of this annular is communicated with outside by drainage channel.
In such scheme, the multistage return flume of described annular is three grades of return flumes of annular, and its concrete structure is that symmetry offers annular one-level return flume, annular secondary return flume, three grades of return flumes of annular from inside to outside at the axial two ends of sliding bearing inwall; Three grades of return flumes of this annular are communicated with by drainage channel 18, discharge the lubricated water leaking.
Described annular pneumatic sealing device comprises annular pneumatic seal groove and the even chamber of annular pneumatic, and wherein, annular pneumatic seal groove is arranged on the inwall between each sealing gland lid and electric main shaft; The even chamber of annular pneumatic is arranged on sealing gland lid and radially junction, sliding bearing end, and annular pneumatic seal groove is circumferentially evenly distributed with the multiple through holes that are communicated with the even chamber of annular pneumatic.Described number of openings is 6 ~ 48.This through hole is inclined hole, and the angle between its center line and axis is 45 ° to 135 °.
The present invention compared with prior art, has sealing reliable, advantages of simple structure and simple.By the annular return flume structure of water lubrication dynamic and hydrostatic bearing and sealing is made to an entirety, manufacturability is better, has reduced assembling link, has eliminated the impact of alignment error on sealing effectiveness.And sealing gland lid and bearing are by bolted, install simply, after installation, form air pressure annular seal groove and the even groove of gas-pressure ring shape, design ingenious, sealing gland lid is processed separately, has reduced the difficulty of processing of through hole between air pressure annular seal groove and the even groove of gas-pressure ring shape, cuts down finished cost.By introducing external air source, source of the gas gas enters the even chamber of annular pneumatic by inlet channel, enter annular pneumatic seal groove by the circumferential equally distributed through hole of annular pneumatic seal groove, the impurity of main shaft space outerpace is difficult for entering high-speed motorized spindles inside, the lubricated water leaking is got rid of by annular return flume simultaneously, prevented motor entering water.
Brief description of the drawings
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
Fig. 1 is a kind of sealed structural representation of the present invention's high-speed motorized spindles of adopting water lubrication dynamic and hydrostatic bearing.
Fig. 2 is the enlarged drawing of I portion in Fig. 1.
In Fig. 1, Fig. 2: 1, electric main shaft; 2, sealing gland lid (front); 3, annular pneumatic seal groove (front); 4, the even chamber of annular pneumatic (front); 5, three grades of return flumes of annular (front); 6, annular secondary return flume (front); 7, annular one-level return flume (front); 8, inlet channel; 9, bearing cap; 10, sliding bearing; 11, sealing gland lid (afterwards); 12, rotor; 13, annular pneumatic seal groove (afterwards); 14, the even chamber of annular pneumatic (afterwards); 15, three grades of return flumes of annular (afterwards); 16, annular secondary return flume (afterwards); 17, annular one-level return flume (afterwards); 18, drainage channel; 19, through hole.
Detailed description of the invention
As shown in Figure 1, in the water lubriucated bearing hermetically-sealed construction of electric main shaft of the present invention, sliding bearing 10 is set on the electric main shaft 1 that stretches out rotor 12, the sealing gland lid 2,11 of symmetry before and after being set with on the electric main shaft 1 at sliding bearing 10 two ends, and fastening with sliding bearing 10, in sliding bearing, be provided with inlet channel 8 and drainage channel 18.Offer annular one- level return flume 7,17 in the sliding bearing 10 axial two ends of inwall symmetries, annular one- level return flume 7,17 arranged outside annular secondary return flumes 8,16, annular secondary return flume 8,16 arranged outside have three grades of return flumes 9,15 of annular; These three grades forward and backward annular return flumes are communicated with by drainage channel 18, discharge the lubricated water leaking.
On inwall between sealing gland lid 2,11 and electric main shaft 1, be provided with annular pneumatic seal groove 3,13; Sealing gland lid 2,11 and sliding bearing 10 ends radially joint portion are provided with the even chamber 4,14 of annular pneumatic; The even chamber 4,14 of annular pneumatic is communicated with outside by inlet channel 8.Annular pneumatic seal groove 3,13 is circumferentially evenly distributed with the through hole that is communicated with the even chamber 4,14 of annular pneumatic.Number of openings can be 6 ~ 48, is preferably 36.Gap between sealing gland lid 2,11 and electric main shaft 1 forms insufflation channel.
As shown in Figure 2, through hole 19 is inclined hole, and the angle between its center line and axis can be 45 ° to 135 °, and diagram angle is 70 °.The effect of through hole 19 is mainly that the air pressure in even annular pneumatic chamber is imported to annular pneumatic seal groove, and along with increasing of through hole 19 quantity, the air seal power forming in annular pneumatic seal groove is more even in circumferential distribution.
The operation principle of hermetically-sealed construction of the present invention is: before external air source enters respectively by inlet channel 8, the even chamber 4 of rear annular pneumatic, 14, the even chamber 4 of annular pneumatic, 14 gas is before multiple through holes 19 enter, rear pressurized seal groove 3, in 13, gas flow in front pressurized seal groove 3 is divided into two parts, the insufflation channel that gap between the premenstrual sealing gland lid 2 of a part and main shaft 1 forms arrives front-end of spindle, thereby stop the impurity of main shaft space outerpace to enter in high-speed motorized spindles, three grades of return flumes 5 of annular before another part gas flows into, 6, 7 are flowed out by drainage channel 18 with the lubricated water leaking, stop the lubricated water leaking to flow to main shaft outside.Gas flow in rear pressurized seal groove 13 is divided into two parts equally, a part through after the insufflation channel arrival electric main shaft device inside that forms of sealing gland lid 11 and the gap of main shaft 1, after another part gas flows into, three grades of return flumes 16,17,18 of annular are flowed out by drainage channel 18 with the lubricated water leaking, and the lubricant medium water and steam that has stoped sliding axle socket end to be let out flows in motor.Experiment showed, that the present invention, to adopting the high-speed motorized spindles sealing property of water lubrication dynamic and hydrostatic bearing reliable, has fundamentally protected motor, avoid motor corrosion and insulation damages, for the safe operation of high-speed motorized spindles provides reliable environment.
Claims (5)
1. one kind adopts the high-speed electric main shaft hermetically-sealed construction of water lubrication dynamic and hydrostatic bearing, comprise the sliding bearing being set on the electric main shaft that stretches out rotor, the sealing gland lid of symmetry before and after being set with on the electric main shaft at sliding bearing two ends, and fastening with sliding bearing two ends, it is characterized in that: in sliding bearing, be provided with inlet channel and drainage channel, between each sealing gland lid and electric main shaft, be provided with by inlet channel and the outside annular pneumatic sealing device being communicated with, the gap between sealing gland lid and electric main shaft forms insufflation channel; At the axial two ends of sliding bearing inwall, symmetry offers annular multistage return flume, and the multistage return flume of this annular is communicated with outside by drainage channel.
2. the high-speed electric main shaft hermetically-sealed construction of employing water lubrication dynamic and hydrostatic bearing as claimed in claim 1, it is characterized in that: the multistage return flume of described annular is three grades of return flumes of annular, its concrete structure is that symmetry offers annular one-level return flume, annular secondary return flume, three grades of return flumes of annular from inside to outside at the axial two ends of sliding bearing inwall; Three grades of return flumes of this annular are communicated with by drainage channel, discharge the lubricated water leaking.
3. the high-speed electric main shaft hermetically-sealed construction of employing water lubrication dynamic and hydrostatic bearing as claimed in claim 1, it is characterized in that: described annular pneumatic sealing device comprises annular pneumatic seal groove and the even chamber of annular pneumatic, wherein, annular pneumatic seal groove is arranged on the inwall between each sealing gland lid and electric main shaft; The even chamber of annular pneumatic is arranged on sealing gland lid and radially junction, sliding bearing end, and annular pneumatic seal groove is circumferentially evenly distributed with the multiple through holes that are communicated with the even chamber of annular pneumatic.
4. the high-speed electric main shaft hermetically-sealed construction of employing water lubrication dynamic and hydrostatic bearing as claimed in claim 3, is characterized in that: described number of openings is 6～48.
5. the high-speed electric main shaft hermetically-sealed construction of employing water lubrication dynamic and hydrostatic bearing as claimed in claim 3, is characterized in that: described through hole is inclined hole, and the angle between its center line and axis is 45 ° to 135 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361483.9A CN102861927B (en) | 2012-09-25 | 2012-09-25 | Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361483.9A CN102861927B (en) | 2012-09-25 | 2012-09-25 | Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing |
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| Publication Number | Publication Date |
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| CN102861927A CN102861927A (en) | 2013-01-09 |
| CN102861927B true CN102861927B (en) | 2014-07-02 |
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| CN201210361483.9A Expired - Fee Related CN102861927B (en) | 2012-09-25 | 2012-09-25 | Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing |
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| CN103394712B (en) * | 2013-07-30 | 2016-03-23 | 江苏新贝斯特中传科技有限公司 | A kind of two-head lathe main shaft |
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| CN105370887B (en) * | 2015-11-04 | 2017-07-14 | 西北工业大学 | A kind of quiet dynamic compound sealing structure and method for rotary machine rotor |
| CN106763214A (en) * | 2017-01-18 | 2017-05-31 | 东南大学 | A kind of dynamic and static pressure submerged bearing for postposition type electric main shaft of motor aiding support |
| CN107100940A (en) * | 2017-05-19 | 2017-08-29 | 温岭市九洲电机制造有限公司 | A kind of lubrication system of motor |
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| CN108481077A (en) * | 2018-04-09 | 2018-09-04 | 苏州安路特汽车部件有限公司 | A kind of main shaft of numerical control machine tool water discharge method |
| CN108895086B (en) * | 2018-09-20 | 2019-10-01 | 燕山大学 | A kind of aerostatic bearing with metal-rubber ring |
| CN109261993A (en) * | 2018-11-21 | 2019-01-25 | 陕西海力特精密机械有限公司 | Numerically controlled lathe high-speed electric main shaft gas sealing structure |
| CN111706530B (en) * | 2019-08-20 | 2021-06-29 | 苏州玛旭自动化科技有限公司 | Coaxial double-blade gas isolation sealing device |
| CN113547341A (en) * | 2021-09-22 | 2021-10-26 | 北京博鲁斯潘精密机床有限公司 | Guide rail pair of ultra-precise cylindrical static pressure numerical control machine tool |
| CN114484245A (en) * | 2021-12-27 | 2022-05-13 | 中车永济电机有限公司 | Oil-spraying lubricating sealing structure applied to high-speed motor |
| CN114937632A (en) * | 2022-07-25 | 2022-08-23 | 华海清科股份有限公司 | Be applied to two-way atmoseal structure and wafer processing apparatus that wafer was handled |
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|---|---|---|---|---|
| DE3415366C2 (en) * | 1984-04-25 | 1987-05-27 | Congermania Mess- Und Regelgeraete Gmbh, 2440 Oldenburg, De | |
| US5921731A (en) * | 1996-12-31 | 1999-07-13 | The Ingersoll Milling Machine Company | High speed hydrostatic spindle |
| CN201564770U (en) * | 2009-12-18 | 2010-09-01 | 董建民 | Moxibustion frame |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564770B (en) * | 2009-05-15 | 2011-01-05 | 西安交通大学 | High-speed electric main shaft device for lubricating hydrodynamic and hydrostatic bearings by adopting water |
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2012
- 2012-09-25 CN CN201210361483.9A patent/CN102861927B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3415366C2 (en) * | 1984-04-25 | 1987-05-27 | Congermania Mess- Und Regelgeraete Gmbh, 2440 Oldenburg, De | |
| US5921731A (en) * | 1996-12-31 | 1999-07-13 | The Ingersoll Milling Machine Company | High speed hydrostatic spindle |
| CN201564770U (en) * | 2009-12-18 | 2010-09-01 | 董建民 | Moxibustion frame |
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