CN100351535C - Machine tool electric main shaft realizing supporting float by adopting hydrostatic bearing - Google Patents
Machine tool electric main shaft realizing supporting float by adopting hydrostatic bearing Download PDFInfo
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- CN100351535C CN100351535C CNB2003101123778A CN200310112377A CN100351535C CN 100351535 C CN100351535 C CN 100351535C CN B2003101123778 A CNB2003101123778 A CN B2003101123778A CN 200310112377 A CN200310112377 A CN 200310112377A CN 100351535 C CN100351535 C CN 100351535C
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- bearing
- supporting
- main shaft
- spindle
- machine tool
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Abstract
The present invention relates to a machine tool motorized spindle for implementing supporting floatation by adopting a hydrostatic bearing, which comprises a spindle front bearing (1), the spindle (5) and a spindle back bearing (10), wherein both ends of the spindle (5) are respectively supported on the spindle front bearing (1) and the spindle back bearing (10), and the spindle front bearing (1) is supported on the bearing seat (13) of a front bearing shaft; the spindle back bearing (10) is supported on the bearing seat (9) of a back bearing shaft; a back bearing floating sleeve (8) is also arranged between the spindle back bearing (10) and the bearing seat (9) of a back bearing shaft, and the spindle back bearing (10 is sheathed in the back bearing floating sleeve (8); the bearing seat (9) of a back bearing shaft is sheathed in the back bearing floating sleeve (8), and a plurality of oil cavities (8A) of the hydrostatic bearing are formed in the inner wall of the bearing seat (9) of a back bearing shaft, which is in contact with the back bearing floating sleeve (8); the oil cavities (8A) are communicated with the oil inlet A of an oil supplying system through an oil supplying passage (8B). The present invention can ensure the rotating precision and the rigidity of the spindle, have the advantages of simple structure and parts in a small quantity and greatly reduce the mechanical processing difficulty of a spindle bearing hole so as to ensure the precision of the mutual positions of bearing holes.
Description
Technical field:
The present invention is a kind of unsteady electrical spindle for machine tool of implementing to support, and particularly a kind of hydrodynamic journal liquid polymers that adopt are implemented the electrical spindle for machine tool that supporting is floated.
Background technique:
For working life and the technical performance thereof that guarantees the lathe high-speed electric main shaft; usually the supporting of the front and back of electrical spindle for machine tool all must be worked under the situation of the pre-interference of a certain accurate amount; but during owing to the lathe high speed operation; pivot friction heating and built-in motor work heating can cause the main shaft elongation strain; destroy original pre-interference state, even cause bearing to burn.For avoiding this situation to take place, one of them supporting of electric main shaft must be arranged to the mode of axial float, promptly, discharge the additional load that the main shaft thermal distortion produces, and by deceleration loading device axial preload is carried out in the back supporting and quantitatively regulate by being bearing in the micro-displacement of axial direction.
The floating current supporting mainly contains two kinds of structures, and a kind of is the sliding sleeve that leans on Spielpassung, this simple in structure, but radial direction is gapped, can influence the rigidity of the rotating accuracy and the main shaft of main shaft; Another kind is to adopt the linear roller bearing cover, its mechanism's ideal, but because complex structure, number of spare parts increases, can cause the mechanical processing difficulty in main shaft supporting hole to increase greatly, if mutual alignment precision that can not fine assurance bearing hole position can be blocked main shaft supporting equally, destroy original pre-interference.
Summary of the invention:
The objective of the invention is to overcome above-mentioned shortcoming and a kind of rotating accuracy and the rigidity that not only can guarantee main shaft is provided, and it is simple in structure, number of spare parts is few, the mechanical processing difficulty in main shaft supporting hole can be reduced greatly, and the unsteady electrical spindle for machine tool of employing hydrodynamic journal liquid polymers enforcement supporting of the mutual alignment precision of bearing hole position can be guaranteed.
Structural representation of the present invention as shown in drawings, support (1) before including main shaft, main shaft (5), supporting (10) behind the main shaft, support on (10) after being bearing in preceding supporting of main shaft (1) and main shaft respectively at the two ends of main shaft (5), and supporting (1) is bearing on the preceding supporting shaft holder (13) before the main shaft, supporting (10) is bearing on the rear trunnion bearing (9) behind the main shaft, wherein also be provided with supporting floating bushing (8) in back behind the main shaft between supporting (10) and the rear trunnion bearing (9), supporting (10) is sleeved in the back supporting floating bushing (8) behind the main shaft, back supporting floating bushing (8) is sleeved on the rear trunnion bearing (9), and rear trunnion bearing (9) with inwall that back supporting floating bushing (8) contacts on made several oil pockets (8A), oil pocket (8A) communicates with the filler opening A of oil supply system by oil supply gallery (8B).
The oil supply gallery (8B) of above-mentioned oil pocket (8A) is provided with hydrostatic bearing flow controller (7).
Above-mentioned oil pocket (8A) has 2～4 row oil pockets in axial directional distribution.
Above-mentioned oil pocket (8A) has two row in axial directional distribution, and every row are along circumferentially being evenly equipped with 4 oil pockets.
The middle part of above-mentioned main shaft (5) is equiped with the electric machine assembly that includes motor water jacket (3), motor stator (4), rotor (6), wherein rotor (6) is sleeved on the main shaft (5), motor stator (4) is sleeved on the outside of rotor (6), and motor water jacket (3) is sleeved on the outside of motor stator (4).
The outside of above-mentioned motor water jacket (3) also is set with electric spindle jacket tube (2).
Above-mentioned before supporting shaft holder (13) can with electric spindle jacket tube (2) as one.
The present invention since adopted with hydrostatic bearing electric main shaft after supporting with after to support the knot that floating bushing separates equal, be supported with good axial float state after having guaranteed, when the machine tool chief axis high speed operation, pivot friction heating and inner electric machine work heating cause the main shaft elongation strain and extend back, just can freely regulate small axial displacement, thereby avoid the harmful effect that causes thus, and because hydrostatic bearing has favorable rigidity, minimum friction factor, desirable precision and damping capacity, move steadily so can realize the back supporting, and effectively absorb issuable vibration; In addition, hydrostatic bearing of the present invention adopts has some row in axial directional distribution, whenever is listed in the multi-cavity hydrostatic bearing that circumferentially is evenly equipped with several oil pockets, makes it can bear radial load, also can bear axial tilting moment; Simultaneously, the present invention is when debugging electric spindle mounted, supporting floating bushing after earlier supporting behind the main shaft being packed into, again the back supporting floating bushing rear trunnion bearing of packing into, this hydrostatic bearing is fed high pressure static pressure oil, the concentricity accurate adjustment of supporting before and after can realizing is so accurately adjusted to higher required precision to the concentricity of front and back supporting.In addition, because the oil film of hydrostatic bearing is attached on the axle journal, axle journal sunkly can be filled up by oil film, so the oil slick thickness of hydrostatic bearing plays homogenization to the deviation from circular from of axle journal and bearing hole.Therefore, machining of the present invention and mounting and testing technique difficulty are reduced greatly, and the oil film pressure of hydrostatic bearing of the present invention is supplied with from the external world by oil hydraulic pump, its bearing capacity is not with rotation speed change, so hydrostatic bearing is applicable to the slow-speed of revolution or speed range and changes main shaft greatly, movement velocity among the present invention between rear trunnion bearing and the back supporting floating bushing is extremely low, is fit to very much adopt the hydrostatic bearing technology.The present invention is that a kind of design is ingenious, and convenient and practical employing hydrodynamic journal liquid polymers are implemented the electrical spindle for machine tool that supporting is floated.
Description of drawings:
Describe concrete structure of the present invention in detail below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the B-B sectional view among Fig. 1.
Embodiment:
Embodiment:
Structural representation of the present invention such as Fig. 1, shown in 2, support (1) before including main shaft, main shaft (5), supporting (10) behind the main shaft, support on (10) after being bearing in preceding supporting of main shaft (1) and main shaft respectively at the two ends of main shaft (5), and supporting (1) is bearing on the preceding supporting shaft holder (13) before the main shaft, supporting (10) is bearing on the rear trunnion bearing (9) behind the main shaft, wherein also be provided with supporting floating bushing (8) in back behind the main shaft between supporting (10) and the rear trunnion bearing (9), supporting (10) is sleeved in the back supporting floating bushing (8) behind the main shaft, back supporting floating bushing (8) is sleeved on the rear trunnion bearing (9), and rear trunnion bearing (9) with inwall that back supporting floating bushing (8) contacts on made several oil pockets (8A), oil pocket (8A) communicates with the filler opening A of oil supply system by oil supply gallery (8B).
For regulating charge oil pressure, the oil supply gallery (8B) of above-mentioned oil pocket (8A) is provided with hydrostatic bearing flow controller (7).
Above-mentioned oil control (8A) has 2～4 row oil pockets in axial directional distribution.In the present embodiment, above-mentioned oil pocket (8A) has two row in axial directional distribution, and every row are along circumferentially being evenly equipped with 4 oil pockets.
The middle part of above-mentioned main shaft (5) is equiped with the electric machine assembly that includes motor water jacket (3), motor stator (4), rotor (6), wherein rotor (6) is sleeved on the main shaft (5), motor stator (4) is sleeved on the outside of rotor (6), and motor water jacket (3) is sleeved on the outside of motor stator (4).The outside of motor water jacket (3) also is set with electric spindle jacket tube (2).In the present embodiment, be processing and easy for installation, above-mentioned before supporting shaft holder (13) can with electric spindle jacket tube (2) as one.
The front end of above-mentioned main shaft (5) also can be equipped with operating cylinder (12).For making overall appearance of the present invention generous, the outside of above-mentioned operating cylinder (12) also is equiped with case (11)
Static pressure oil of the present invention can shared operating cylinder or the oil supply system of cold oil.High pressure static pressure oil is entered by filler opening A, and by annular oil supply, static pressure oil is assigned to eight oil supply galleries (8B).Static pressure oil enters the oil pocket of back supporting hydrostatic bearing seat by the hydrostatic bearing flow controller in the passage, thereby forms the multi-cavity hydrostatic bearing, makes it to bear radial load, also can bear axial tilting moment.
Claims (7)
1, a kind of hydrodynamic journal liquid polymers that adopt are implemented the electrical spindle for machine tool that supporting is floated, support (1) before including main shaft, main shaft (5), supporting (10) behind the main shaft, support on (10) after being bearing in preceding supporting of main shaft (1) and main shaft respectively at the two ends of main shaft (5), and supporting (1) is bearing on the preceding supporting shaft holder (13) before the main shaft, supporting (10) is bearing on the rear trunnion bearing (9) behind the main shaft, it is characterized in that also being provided with the back between the supporting (10) and rear trunnion bearing (9) behind the main shaft supports floating bushing (8), supporting (10) is sleeved in the back supporting floating bushing (8) behind the main shaft, back supporting floating bushing (8) is sleeved on the rear trunnion bearing (9), and rear trunnion bearing (9) with inwall that back supporting floating bushing (8) contacts on make several oil pockets (8A) as hydrostatic bearing, oil pocket (8A) communicates with the filler opening A of oil supply system by oil supply gallery (8B).
2, employing hydrodynamic journal liquid polymers according to claim 1 are implemented the electrical spindle for machine tool that supporting is floated, and it is characterized in that the oil supply gallery (8B) of above-mentioned oil pocket (8A) is provided with hydrostatic bearing flow controller (7).
3, employing hydrodynamic journal liquid polymers according to claim 1 are implemented the electrical spindle for machine tool that supporting is floated, and it is characterized in that above-mentioned oil pocket (8A) has 2～4 row oil pockets in axial directional distribution.
4, employing hydrodynamic journal liquid polymers according to claim 3 are implemented the electrical spindle for machine tool that supporting is floated, and it is characterized in that above-mentioned oil pocket (8A) has two row in axial directional distribution, and every row are along circumferentially being evenly equipped with 4 oil pockets.
5, implement the electrical spindle for machine tool that supporting is floated according to claim 1 or 2 or 3 or 4 described employing hydrodynamic journal liquid polymers, the middle part that it is characterized in that above-mentioned main shaft (5) is equiped with the electric machine assembly that includes motor water jacket (3), motor stator (4), rotor (6), wherein rotor (6) is sleeved on the main shaft (5), motor stator (4) is sleeved on the outside of rotor (6), and motor water jacket (3) is sleeved on the outside of motor stator (4).
6, employing hydrodynamic journal liquid polymers according to claim 5 are implemented the electrical spindle for machine tool that supporting is floated, and it is characterized in that the outside of above-mentioned motor water jacket (3) also is set with electric spindle jacket tube (2).
7, employing hydrodynamic journal liquid polymers according to claim 6 are implemented the electrical spindle for machine tool that supporting is floated, it is characterized in that above-mentioned before supporting shaft holder (13) can with electric spindle jacket tube (2) as one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101123778A CN100351535C (en) | 2003-11-28 | 2003-11-28 | Machine tool electric main shaft realizing supporting float by adopting hydrostatic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101123778A CN100351535C (en) | 2003-11-28 | 2003-11-28 | Machine tool electric main shaft realizing supporting float by adopting hydrostatic bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1621703A CN1621703A (en) | 2005-06-01 |
| CN100351535C true CN100351535C (en) | 2007-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101123778A Expired - Fee Related CN100351535C (en) | 2003-11-28 | 2003-11-28 | Machine tool electric main shaft realizing supporting float by adopting hydrostatic bearing |
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| CN (1) | CN100351535C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895170A (en) * | 2010-08-06 | 2010-11-24 | 湖南大学 | Electric main shaft with mouse cage type motor stator cooling structure |
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| CN100396437C (en) * | 2005-10-26 | 2008-06-25 | 广东工业大学 | High speed high rigidity composite multibase gas static pressure bearing electric main shaft |
| JP5169570B2 (en) * | 2008-07-17 | 2013-03-27 | オイレス工業株式会社 | Roll device |
| CN101879609B (en) * | 2010-07-09 | 2012-02-15 | 大连海事大学 | Electric main shaft supported by adopting aerostatic bearing |
| CN102241084B (en) * | 2011-04-28 | 2013-11-13 | 哈尔滨工业大学 | Double-cutterhead horizontal ultra-precision hydrostatic motorized spindle system |
| 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 |
| CN102699356B (en) * | 2012-06-28 | 2014-04-23 | 湖南海捷主轴科技有限公司 | Vertical liquid suspension electric spindle |
| CN102954107B (en) * | 2012-12-14 | 2015-07-01 | 贵阳险峰机床有限责任公司 | High-rigidity double-line liquid hydrostatic bearing |
| TWI612232B (en) | 2013-10-25 | 2018-01-21 | 財團法人工業技術研究院 | The device of the axle oil chamber of hydrostatic spindle |
| CN104647146B (en) * | 2015-02-06 | 2017-01-04 | 湖南大学 | Grinding machine precision based on hydraulic static spindle parts circulate method of rising progressively |
| CN105570301A (en) * | 2016-02-19 | 2016-05-11 | 天津市第二机床有限公司 | High-precision static pressure main shaft |
| CN205895917U (en) * | 2016-03-22 | 2017-01-18 | 宁波圣圭精工科技有限公司 | Static pressure bearing |
| CN108326326B (en) * | 2018-02-02 | 2019-05-21 | 湖南大学 | A kind of intelligence electro spindle grinding processing method and system |
| CN109676520B (en) * | 2018-12-14 | 2021-04-30 | 广州市昊志机电股份有限公司 | Intracavity internal feedback throttling hydrostatic pressure motorized spindle |
| CN110360230A (en) * | 2019-07-11 | 2019-10-22 | 深圳市爱贝科精密机械有限公司 | A kind of oil pressure floating bearing component for electro spindle |
| CN110842770B (en) * | 2019-11-28 | 2021-08-24 | 安阳工学院 | High-speed ultrasonic liquid static pressure type grinding electric spindle |
| CN113210642B (en) * | 2021-06-10 | 2022-08-26 | 山东大学 | High-precision machine tool spindle rotation system and control method |
| CN114909399B (en) * | 2022-06-14 | 2024-03-01 | 哈尔滨工业大学 | Anti-overturning load bearing large-bearing gas floatation main shaft structure |
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| 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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| CN101895170A (en) * | 2010-08-06 | 2010-11-24 | 湖南大学 | Electric main shaft with mouse cage type motor stator cooling structure |
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|---|---|
| CN1621703A (en) | 2005-06-01 |
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Granted publication date: 20071128 Termination date: 20121128 |