CN2765372Y - Dynamic/static pressure bearing electric main shaft - Google Patents
Dynamic/static pressure bearing electric main shaft Download PDFInfo
- Publication number
- CN2765372Y CN2765372Y CN 200420069406 CN200420069406U CN2765372Y CN 2765372 Y CN2765372 Y CN 2765372Y CN 200420069406 CN200420069406 CN 200420069406 CN 200420069406 U CN200420069406 U CN 200420069406U CN 2765372 Y CN2765372 Y CN 2765372Y
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- oil
- main shaft
- bearings
- bearing
- dynamic
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- Expired - Fee Related
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model relates to an electric main shaft of a dynamic and a static-pressure bearings, wherein the main shaft is directly driven by a motor between two bearings and the main shaft and a rotor shaft of the motor are combined into the integration. The main shaft is arranged on a casing through the support of a front and a back bearings, and a motor stator is arranged in the casing. The front and the back bearings are both sliding bearings with annular bearing shells, and the surface of an outer circle of each of the bearings is provided with a current regulator and an oil passage. The sliding bearings are formed by that two annular oil grooves which surround the surface of the outer circle of each of the bearings are communicated by a plurality of longitudinal oil grooves. The circumference of the surface of bearing inner holes are symmetrically distributed with 4 longitudinal static-pressure oil cavities and 4 longitudinal dynamic-pressure oil cavities, the static-pressure oil cavities in cross section form a falcate shape, and the dynamic-pressure oil cavities form a wedge shape. The back part on the bearing casing is provided with an oil-feeding passage, the lower bottom part is provided with an oil-returning passage, the oil-feeding passage and the oil-returning passage are respectively communicated with oil-feeding passages and oil-returning passages of the front and the back bearings to form a pressure-oil circulation oil circuit, and the outer circle of each of the bearings forms a cylindrical shape. The utility model has the characteristics of good bearing rigidity, high rotating precision, stable work and long service life and is suitable for various large and precise numerical control machines and other devices.
Description
Technical field
The utility model relates to a kind of electronic main shaft that various lathes are used, particularly dynamic and hydrostatic bearing electricity main shaft.
Background technology
Existing electric main axle structure mainly is made up of driving motor, rolling bearing, cover cylinder shell, end cap, and the heat that its bearing and motor produce is distributed by recirculated cooling water, and its shortcoming is that rotating accuracy is not high, poor seismic behavior, lack useful life and easy-maintaining not.
Summary of the invention
The purpose of this utility model is the drawback that overcomes above-mentioned prior art, provides a kind of rotating accuracy height, anti-seismic performance good, and radiating effect is strong, long service life and the electricity of dynamic and hydrostatic bearing for ease of maintenaince main shaft.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of dynamic and hydrostatic bearing electricity main shaft, mainly be combined into an integral body by rotor and main shaft, main shaft is by the motor direct-drive that places between the two bearings, main shaft is installed on the casing through front and back bearings, motor stator is installed in the casing, it is characterized in that front and back bearings is the sliding bearing of annular axle bush, the bearing top circle surface is provided with flow controller and oil duct, it is by two annular oil grooves around the bearing outer round surface, through some the axial oil grooves formation that is connected, the warp-wise oil duct of gap between brearing bore and the main shaft through passing the bearing body wall is communicated with the flow controller oil duct, brearing bore surface circumference is symmetrically distributed, and 4 axial static pressure carry oil pockets and 4 axial hydrodynamics carry oil pockets, in same oil pocket, static pressure oil pocket and dynamic pressure oil pocket are interconnected, its cross section, the static pressure oil pocket is a month bending, the dynamic pressure oil pocket is a wedge, there is oil inlet passage at the back on the bearing casing, lower bottom part has drainback passage, two oil ducts are respectively with preceding, rear bearing oil input channel and back oil road are communicated with, and constitute the pressure oil circulating oil path.
Description of drawings
Fig. 1 is the structure chart of the utility model dynamic and hydrostatic bearing electricity main shaft;
Fig. 2 is the structure chart of the utility model dynamic and hydrostatic bearing oil pocket;
Fig. 3 is the structure chart of the utility model bearing flow controller oil circuit and bear box oil circuit.
Embodiment
The utility model further specifies as follows in conjunction with specific embodiments referring to accompanying drawing:
A kind of dynamic and hydrostatic bearing electricity main shaft, mainly be combined into an integral body by drive motors rotor and main shaft, stator cage 7 and stator 8 are installed in the casing 6, rotor 9 is installed on the main shaft 1, it is by adjusting pad 10, and locking nut 11 is fixed on the conical surface of main shaft, and main shaft 1 is installed on casing 6 and the back cabinet 14 through fore bearing 4 and rear bearing 12, through fore bearing adjusting pad 3, front end housing 2 and rear end cap 16 are connected into one.Fore bearing 4 and rear bearing 12 are the sliding bearing of annular axle bush, the bearing top circle surface is provided with flow controller oil duct 15, and forward and backward bearing 4,12 cylindricals all are cylinders, and flow controller oil duct 15 and housing internal circular surfaces connect the formation flow controller, oil stifled 13 is used for the fabrication hole sealing, referring to accompanying drawing 1.
Flow controller oil duct 15 is to be linked to each other through oil groove 19 by 2 annular oil grooves 18 around forward and backward bearing 4,12 outer round surface to constitute the flow controller oil flow channel.Forward and backward bearing 4,12 inner surface circumference are symmetrically distributed, and 4 axial static pressure carry oil pockets 20 and 4 axial hydrodynamics carry oil pockets 21, and static pressure carrying oil pocket 20 is a month bending, and dynamic pressure carrying oil pocket 21 is a wedge.Forward and backward bearing 4,12 endoporus are communicated with flow controller oil duct 15 with the radial direction oil 23 of gap 22 through passing forward and backward bearing 4,12 body walls between the main shaft 1; There is oil inlet passage 5 at the back on the casing 6, and lower bottom part has oil discharge passage 17.The turnover oil passage 5,17 of casing 6 is communicated with the flow controller oil duct 15 of front and back bearings 4,12 respectively.The outlet of the import of oil inlet passage 5 and oil discharge passage 17 is attached to external pressure oil fueller respectively, referring to accompanying drawing 2,3.
The utility model is that hydrodynamic and hydrostatic pressure bearing and variable-frequency motor are produced on together, offer the certain pressure oil of front and back bearings by oil supply system, pressure oil is through after the flow controller throttling of front and back bearings self, journal bearing and axial thrust bearing before and after flowing to, main shaft is suspended in the middle of the certain pressure fluid, main shaft is held up not and Metal Contact, electrical power then, main shaft is in the situation turning down of no Metal Contact, main shaft because the dynamic pressure effect of dynamic pressure oil pocket makes main shaft self-centering (geometric center), passes through frequency converter in rotary course, spindle speed can be realized stepless speed regulation, and its rotating speed can be at 300 ~ 30000 rev/mins of internal speed-changings.
The utility model advantage is: 1, main shaft good rigidly, when 100 millimeters rotating speeds of main shaft diameter of phi were 3000 rev/mins, dynamic stiffness was above 100 kilograms/micron.2, the bearing working life-span long because bearing is to adopt hydrostatic and hydrodynamic bearing not have Metal Contact, main shaft bearing does not have wearing and tearing, life-span endless theoretically, will long 3-5 in the real work than rolling bearing life doubly.3, owing to adopt quiet hydrodynamic fluid bearing, rotor and main shaft form with a fine finishining, so main shaft and rotor coaxial are good, and main shaft stable working friction.4, bearing is constantly supplied with recycle oil owing to oil supply system when high speed rotary, and recycle oil can freeze by thermostat, therefore the heat that produces during the bearing high speed rotary is constantly taken away by circulation fluid, make oil liquid temperature constant, viscosity can not change, make bearing working reliable, stable accuracy is constant.5, the variable-frequency motor that adopts of this patent is own research and development, and it can be in the wider frequency speed change, and its rotating speed can be at 300-30000 rev/min of internal speed-changing, and rotating accuracy and rigidity keep stablizing.6, because this patent is simple in structure, dismounting, maintenance, repair are conveniently.High rigidity, high life, high accuracy, high stability, high vibration resistance and easy the maintenance are main features of the present utility model.
The utility model can be used as the main shaft functional part, is widely used in various high accuracy, high-speed numerically control grinder and all kinds of machining tool.As numerical control cylindrical grinder, numerical control plane grinding machine, numeral-controlled internal grinder and numerically controlled lathe, the Digit Control Machine Tool of various high rigidity such as numerical control borer, CNC milling machine, numerical control machining center, high rotating accuracy.
Claims (1)
1, a kind of dynamic and hydrostatic bearing electricity main shaft, mainly be combined into an integral body by rotor and main shaft, main shaft is by the motor direct-drive that places between the two bearings, main shaft is installed on the casing through front and back bearings, motor stator is installed in the casing, it is characterized in that front and back bearings is the sliding bearing of annular axle bush, the bearing top circle surface is provided with flow controller and oil duct, it is by two annular oil grooves around the bearing outer round surface, through some the axial oil grooves formation that is connected, the warp-wise oil duct of gap between brearing bore and the main shaft through passing the bearing body wall is communicated with the flow controller oil duct, and brearing bore surface circumference is symmetrically distributed, and 4 axial static pressure carry oil pockets and 4 axial hydrodynamics carry oil pockets, in same oil pocket, static pressure oil pocket and dynamic pressure oil pocket are interconnected, its cross section, static pressure oil pocket are a month bending, and the dynamic pressure oil pocket is a wedge, there is oil inlet passage at the back on the bearing casing, lower bottom part has drainback passage, and two oil ducts are respectively with preceding, rear bearing oil input channel and back oil road are communicated with, and constitute the pressure oil circulating oil path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069406 CN2765372Y (en) | 2004-12-08 | 2004-12-08 | Dynamic/static pressure bearing electric main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069406 CN2765372Y (en) | 2004-12-08 | 2004-12-08 | Dynamic/static pressure bearing electric main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2765372Y true CN2765372Y (en) | 2006-03-15 |
Family
ID=36168286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420069406 Expired - Fee Related CN2765372Y (en) | 2004-12-08 | 2004-12-08 | Dynamic/static pressure bearing electric main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2765372Y (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915265A (en) * | 2010-09-15 | 2010-12-15 | 山东大学 | Elliptical static-pressure sliding bearing |
| 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 |
| CN102270002A (en) * | 2011-04-01 | 2011-12-07 | 天津大学 | System capable of controlling viscosity of electric spindle lubricant and method thereof |
| CN102335755A (en) * | 2011-09-22 | 2012-02-01 | 宝鸡忠诚机床股份有限公司 | Large-sized precise direct-driving main shaft structure |
| CN101710754B (en) * | 2009-11-27 | 2012-05-02 | 江苏华雕机械有限公司 | Electric main shaft lubricated by water or water fog |
| CN102788086A (en) * | 2012-03-27 | 2012-11-21 | 秦嗣伟 | Oil static pressure main shaft main shaft for shaft oil supply |
| CN102886534A (en) * | 2012-11-01 | 2013-01-23 | 上海机床厂有限公司 | High-speed and high-rigidity dynamic and static pressure built-in electric main shaft |
| CN103095084A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Oil-immersion type high specific power permanent magnet brushless direct current motor |
| CN103206398A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Rear bearing of motor as well as centrifugal compressor and refrigeration equipment comprising same |
| CN103486135A (en) * | 2013-09-23 | 2014-01-01 | 湖大海捷(湖南)工程技术研究有限公司 | Hybrid bearing component with throttling structure |
| CN103498872A (en) * | 2013-09-23 | 2014-01-08 | 湖大海捷(湖南)工程技术研究有限公司 | Hybrid bearing of which oil outlets having function of balancing main shaft and components thereof |
| CN105952797A (en) * | 2016-03-22 | 2016-09-21 | 宁波圣圭精工科技有限公司 | Static-pressure spindle |
| CN106425635A (en) * | 2016-12-15 | 2017-02-22 | 常州机电职业技术学院 | Electric main shaft based on dynamic-pressure sliding bearings |
| 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 |
| CN107228089A (en) * | 2017-06-15 | 2017-10-03 | 南京林业大学 | Sodium-cooled fast reactor sodium pump fluid hybrid type guide bearing |
| CN107737628A (en) * | 2017-11-24 | 2018-02-27 | 成都大宏立机器股份有限公司 | A kind of single cylinder cone crusher |
| CN108779801A (en) * | 2016-02-02 | 2018-11-09 | 博格华纳公司 | Bearing and its manufacture and use process |
| CN109826864A (en) * | 2019-03-26 | 2019-05-31 | 威海奥威尔精密部件有限公司 | A kind of long-lived static main shaft |
| CN110842770A (en) * | 2019-11-28 | 2020-02-28 | 安阳工学院 | High-speed ultrasonic liquid static pressure type grinding electric spindle |
| CN112366890A (en) * | 2020-10-31 | 2021-02-12 | 李登进 | Noise reduction type gear low-speed motor |
| CN112377522A (en) * | 2020-10-23 | 2021-02-19 | 东方电气集团东方汽轮机有限公司 | Self-aligning support bearing |
| CN114623160A (en) * | 2022-03-25 | 2022-06-14 | 西安热工研究院有限公司 | Hybrid bearing |
| CN115095592A (en) * | 2022-07-26 | 2022-09-23 | 台州伟志机床股份有限公司 | Impact-resistant long-life dynamic pressure main shaft |
-
2004
- 2004-12-08 CN CN 200420069406 patent/CN2765372Y/en not_active Expired - Fee Related
Cited By (32)
| 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 |
| CN101710754B (en) * | 2009-11-27 | 2012-05-02 | 江苏华雕机械有限公司 | Electric main shaft lubricated by water or water fog |
| CN101915265B (en) * | 2010-09-15 | 2011-11-16 | 山东大学 | Elliptical static-pressure sliding bearing |
| CN101915265A (en) * | 2010-09-15 | 2010-12-15 | 山东大学 | Elliptical static-pressure sliding bearing |
| CN102270002B (en) * | 2011-04-01 | 2013-04-24 | 天津大学 | System capable of controlling viscosity of electric spindle lubricant and method thereof |
| CN102270002A (en) * | 2011-04-01 | 2011-12-07 | 天津大学 | System capable of controlling viscosity of electric spindle lubricant and method thereof |
| CN102335755A (en) * | 2011-09-22 | 2012-02-01 | 宝鸡忠诚机床股份有限公司 | Large-sized precise direct-driving main shaft structure |
| CN103095084A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Oil-immersion type high specific power permanent magnet brushless direct current motor |
| CN103206398A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Rear bearing of motor as well as centrifugal compressor and refrigeration equipment comprising same |
| CN103206398B (en) * | 2012-01-17 | 2014-05-07 | 珠海格力电器股份有限公司 | Rear bearing of motor as well as centrifugal compressor and refrigeration equipment comprising same |
| CN102788086A (en) * | 2012-03-27 | 2012-11-21 | 秦嗣伟 | Oil static pressure main shaft main shaft for shaft oil supply |
| CN102886534A (en) * | 2012-11-01 | 2013-01-23 | 上海机床厂有限公司 | High-speed and high-rigidity dynamic and static pressure built-in electric main shaft |
| CN102886534B (en) * | 2012-11-01 | 2014-11-05 | 上海机床厂有限公司 | High-speed and high-rigidity dynamic and static pressure built-in electric main shaft |
| CN103486135A (en) * | 2013-09-23 | 2014-01-01 | 湖大海捷(湖南)工程技术研究有限公司 | Hybrid bearing component with throttling structure |
| CN103498872A (en) * | 2013-09-23 | 2014-01-08 | 湖大海捷(湖南)工程技术研究有限公司 | Hybrid bearing of which oil outlets having function of balancing main shaft and components thereof |
| CN108779801A (en) * | 2016-02-02 | 2018-11-09 | 博格华纳公司 | Bearing and its manufacture and use process |
| CN108779801B (en) * | 2016-02-02 | 2021-03-09 | 博格华纳公司 | Bearing and process for making and using same |
| CN105952797A (en) * | 2016-03-22 | 2016-09-21 | 宁波圣圭精工科技有限公司 | Static-pressure spindle |
| CN106425635A (en) * | 2016-12-15 | 2017-02-22 | 常州机电职业技术学院 | Electric main shaft based on dynamic-pressure sliding bearings |
| CN106425635B (en) * | 2016-12-15 | 2018-04-06 | 常州机电职业技术学院 | Electro spindle based on hydrodynamic sliding bearing |
| 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 |
| CN107228089A (en) * | 2017-06-15 | 2017-10-03 | 南京林业大学 | Sodium-cooled fast reactor sodium pump fluid hybrid type guide bearing |
| CN107228089B (en) * | 2017-06-15 | 2023-08-22 | 南京林业大学 | Fluid dynamic-static pressure mixed guide bearing for sodium-cooled fast reactor sodium pump |
| CN107737628A (en) * | 2017-11-24 | 2018-02-27 | 成都大宏立机器股份有限公司 | A kind of single cylinder cone crusher |
| CN109826864B (en) * | 2019-03-26 | 2021-08-31 | 威海奥威尔精密部件有限公司 | Durable static main shaft |
| CN109826864A (en) * | 2019-03-26 | 2019-05-31 | 威海奥威尔精密部件有限公司 | A kind of long-lived static main shaft |
| CN110842770A (en) * | 2019-11-28 | 2020-02-28 | 安阳工学院 | High-speed ultrasonic liquid static pressure type grinding electric spindle |
| CN112377522A (en) * | 2020-10-23 | 2021-02-19 | 东方电气集团东方汽轮机有限公司 | Self-aligning support bearing |
| CN112377522B (en) * | 2020-10-23 | 2022-03-01 | 东方电气集团东方汽轮机有限公司 | Self-aligning support bearing |
| CN112366890A (en) * | 2020-10-31 | 2021-02-12 | 李登进 | Noise reduction type gear low-speed motor |
| CN114623160A (en) * | 2022-03-25 | 2022-06-14 | 西安热工研究院有限公司 | Hybrid bearing |
| CN115095592A (en) * | 2022-07-26 | 2022-09-23 | 台州伟志机床股份有限公司 | Impact-resistant long-life dynamic pressure main shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Hu Xishi Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060315 Termination date: 20091208 |