CN202621940U - High-speed accurate external plane throttling hybrid bearing electric spindle - Google Patents
High-speed accurate external plane throttling hybrid bearing electric spindle Download PDFInfo
- Publication number
- CN202621940U CN202621940U CN2012201424182U CN201220142418U CN202621940U CN 202621940 U CN202621940 U CN 202621940U CN 2012201424182 U CN2012201424182 U CN 2012201424182U CN 201220142418 U CN201220142418 U CN 201220142418U CN 202621940 U CN202621940 U CN 202621940U
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- bearing
- spindle
- main shaft
- oil
- throttling
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model discloses a high-speed accurate external plane throttling hybrid bearing electric spindle, belonging to the field of equipments manufactured by machining. According to the high-speed accurate external plane throttling hybrid bearing electric spindle disclosed by the utility model, a spindle is installed in a box body by the supporting of front and rear hybrid bearings and is directly driven by a variable frequency motor which is directly connected with the tail end of the spindle; and the spindle and an external plane throttler form throttling on the surface of the box body, so that spindle oil enters the box body after being subjected to throttling and just flows into six oil grooves on the excircle surface of the front bearing and four oil grooves on the excircle surface of the rear bearing, the front and rear hybrid bearings are respectively provided with four oil grooves, and the spindle oil directly enters a static pressure region of each bearing to enable the spindle to be uniformly suspended in each bearing full of liquid and not to be directly contacted with each bearing under static pressure and staircase effect actions, so that the problems of unsmooth running of parts, poor heat dissipation, journal sticking due to blockage of a throttling oil way and difficulty in throttling cleaning are effectively solved, high speed and accuracy are realized, a structure is simple and compact, installation is convenient, the machining quality of the surface of a workpiece is improved, and the high-speed accurate external plane throttling hybrid bearing electric spindle can be widely applied to machining centers and high-speed and high-accuracy machine tool spindle parts of numerically controlled lathes, numerically controlled milling machines, boring mills, grinders and the like.
Description
Technical field
The utility model relates to the external plane throttling of a kind of high speed and precision dynamic and hydrostatic bearing electricity main shaft, belong to field of machining and machinebuilding technology.
Background technology
Electrical spindle for machine tool is generally by casing, bearing, and main shaft, compositions such as motor, bearing fixing is in casing, and the direct-connected main shaft of motor drives its rotation.Traditional machine tool chief axis adopts gear or belt transmission to transmit the power of motor more, and electric main shaft is lathe realization High-speed machining prerequisite and primary condition, and at present, electric main shaft generally is to adopt built-in motor directly to drive; It can transmit very high rotating speed and moment of torsion, and good rigidly, compact conformation; Can improve the production efficiency of lathe and the crudy of workpiece greatly, but still have following weak point: the radiating condition that mainly is motor is poor, and bearing temperature rise is than higher; Thereby cause the thermal deformation of lathe, occur the seize phenomenon easily, cause the mismachining tolerance of part; The bearing top circle crevice throttle is adopted in throttling, easy blocking, and the cleaning difficulty is very big.So, rationalizing, high speed, precise treatment and high automation are the main feature and the inexorable trends of modern manufacturing industry development.The external plane throttling of high speed and precision dynamic and hydrostatic bearing electricity main shaft guarantees the key feature of lathe realization high speed, precision and automation processing just.For this reason, many scientific research institutions, manufacturer and knowledgeable people are in constantly exploratory development and the electric spindle technology of improvement.
Summary of the invention
For overcome the above-mentioned disadvantage that electric main shaft exists on producing, the utility model problem to be solved provides a kind of simple and compact for structure, runs up, and operates steadily good heat dissipation, the accurate electric main shaft that machining accuracy is high.
It comprises casing, main shaft, hydrodynamic and hydrostatic pressure front and back bearings, external plane flow controller the utility model solution technical scheme that its technical problem adopted, drive end bearing bracket, adjustment ring; Motor flange, rotor, motor stator; Motor housing, electric main shaft is support with the hydrodynamic and hydrostatic pressure bearing, and machine tool chief axis and motor are combined together from structure; Adopt the hydrodynamic and hydrostatic pressure front and back bearings; Main shaft then through the depth cavity configuration of hydrodynamic and hydrostatic pressure front and back bearings, makes it can reach best static pressure effect and dynamic pressure effect, and the required flow controller of hydrodynamic and hydrostatic pressure bearing is placed box outer surface; Guarantee the end play of main shaft with drive end bearing bracket and adjustment ring, and with motor postposition in casing.Combine key technologies such as high-speed bearing, high-speed motor, frequency control and hydrodynamic and hydrostatic pressure, make it can drive cutting element and rotate the processing of realization high speed and precision at a high speed.
The hydrodynamic and hydrostatic pressure bearing electric chief axis uses the hydrodynamic and hydrostatic pressure front and back bearings, and this is the circumferential four oil pockets design of a kind of employing, and oil pocket forms depth chamber, utilizes static pressure and Archimedes's alias of bearing bore, and main shaft is floated automatically.Can be under the hydrodynamic lubrication state, the sliding bearing that can under the hydrodynamic lubrication state, work again, it combines the advantage of hydrostatic bearing and hydrodynamic bearing, has eliminated the deficiency of these two kinds of bearings.Be characterized in adopting solid box; Static pressure and dynamic pressure form depth cavity configuration oil pocket at bearing inner surface; Pressure oil gets into bearing static pressure district during bearing arrangement work; Main shaft is suspended in the middle of the bearing, makes main shaft and bearing not have the machinery friction, thereby improve bearing life and good precision stability is arranged.When the motor-driven main axis rotation, because forming dynamic and static pressure naturally, alias carries oil film in the bearing oil pocket, bearing becomes the hydrodynamic sliding bearing with static pressure pressure field.With three, to compare for five pieces watts, dynamic and hydrostatic bearing is a monolithic construction, bearing and box body hole contact area are big, for being rigidly connected, make the oil film rigidity utilization that is not fully exerted.During main shaft work, oil film rigidity is the very strong bearing capacity that is superimposed with of bearing static rigidity and dynamic rate." homogenizing " effect of pressure oil film can make spindle rotation accuracy be higher than the machining accuracy of axle journal and bearing.
Change flow controller into external; Utilize box outer surface and plane, front and back flow controller to form the pressure compensation element of crevice throttle as system; This flow controller is placed on casing, and spindle oil makes oil get into the static pressure district of bearing again through the oil groove of casing entering bearing top circle through external plane flow controller.Effectively solved the problem of cleaning oil groove, and part processing is simple, easy for installation, it is convenient to clean, and saves the time kept in reserve, increases work efficiency.
The main shaft tail end makes rotor and motor direct-connected with the taper fit mode, and motor places outside the casing.Usually adopt motor and main shaft direct connection; Electric machine built-in is in electric main shaft casing; This fit causes motor in narrow space, sharply to heat up easily and dispels the heat slow; Burn motor easily, motor is made into to make electric machine external in casing with main shaft tail end taper fit, efficiently solve the problem of temperature rise and heat radiation.
Description of drawings
Fig. 1, Fig. 2 are the utility model structural representation.
The specific embodiment
Shown in Figure 1; The specific embodiment of the external plane throttling of a kind of high speed and precision of the utility model dynamic and hydrostatic bearing electricity main shaft; It comprises casing (4), main shaft (1), fore bearing (5), rear bearing (7); Described front and back bearings squeezes into the front and back bearings hole of casing (4) with interference fit through forcing press, according to actual size match grinding main shaft (1) the axle journal place size of fore bearing (5) endoporus and rear bearing (7) endoporus, guarantees that certain interval makes it reach best static pressure effect.Needs are earlier with pack into main shaft (1) and carry out dynamic balance running of rotor (10) before bearing that main shaft (1) is packed into, rotor (10) and main shaft (1) taper fit, and lock with round nut at main shaft (1) tail end.Motor (9) direct connection main shaft also is fixed on the casing (4) through motor flange (8); Drive end bearing bracket (2) and adjustment ring (3) match grinding size guarantee in certain value the end play of axle; Spindle oil directly the past back throttle block (6) entering entering front and back bearings annular oil groove after casing top throttle block (6) throttling arrives each static pressure district and axial oilhole at last, and oil pocket is full of pressure oil in the bearing.
The concrete course of work of the utility model is: after connecting oil-feed and oil return circuit, start static-pressure system, treat that main shaft (1) suspends, regulate frequency converter and make motor speed or cutting element reach required numerical value.
Claims (4)
1. the external plane throttling of high speed and precision dynamic and hydrostatic bearing electric main shaft device, it has comprised electric main shaft casing, main shaft, hydrodynamic and hydrostatic pressure front and back bearings; External plane flow controller, case lid, drive end bearing bracket, adjustment ring; Motor flange, motor housing, rotor, motor stator; It is characterized in that: described device adopts the hydrodynamic and hydrostatic pressure front and back bearings, and main shaft then through the depth cavity configuration of hydrodynamic and hydrostatic pressure front and back bearings, makes it can reach best static pressure effect and dynamic pressure effect; The required flow controller of hydrodynamic and hydrostatic pressure bearing is placed box outer surface, guarantees the end play of main shaft with drive end bearing bracket and adjustment ring, and with motor postposition in casing.
2. dynamic and static pressure front and back bearings according to claim 1 is characterized in that: adopt circumferential four oil pockets design, oil pocket forms depth chamber, utilizes static pressure and Archimedes's alias of bearing bore, and main shaft is floated automatically.
3. according to the said electric main shaft flow controller of claim 1; It is characterized in that: utilize box outer surface and plane, front and back flow controller to form the pressure compensation element of crevice throttle as system; This flow controller is placed on casing, and spindle oil makes oil get into the static pressure district of bearing again through the oil groove of casing entering bearing top circle through external plane flow controller.
4. according to claims 1 described electric spindle motor, it is characterized in that: said main shaft tail end makes rotor and motor direct-connected with the taper fit mode, and motor places outside the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201424182U CN202621940U (en) | 2012-04-07 | 2012-04-07 | High-speed accurate external plane throttling hybrid bearing electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201424182U CN202621940U (en) | 2012-04-07 | 2012-04-07 | High-speed accurate external plane throttling hybrid bearing electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202621940U true CN202621940U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201424182U Expired - Fee Related CN202621940U (en) | 2012-04-07 | 2012-04-07 | High-speed accurate external plane throttling hybrid bearing electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202621940U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170889A (en) * | 2013-03-27 | 2013-06-26 | 湖南湖大瑞来机电有限公司 | Computer numerically controlled (CNC) camshaft grinding machine |
| CN111299617A (en) * | 2020-03-12 | 2020-06-19 | 保定国凯机械设备制造有限公司 | Energy-saving lathe |
-
2012
- 2012-04-07 CN CN2012201424182U patent/CN202621940U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170889A (en) * | 2013-03-27 | 2013-06-26 | 湖南湖大瑞来机电有限公司 | Computer numerically controlled (CNC) camshaft grinding machine |
| CN103170889B (en) * | 2013-03-27 | 2015-12-23 | 湖南湖大瑞徕机电有限公司 | Digital-control camshaft grinding machine |
| CN111299617A (en) * | 2020-03-12 | 2020-06-19 | 保定国凯机械设备制造有限公司 | Energy-saving lathe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20170407 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |