CN102062285B - Large precise differential dynamic and static pressure rotary table - Google Patents
Large precise differential dynamic and static pressure rotary table Download PDFInfo
- Publication number
- CN102062285B CN102062285B CN2010105508356A CN201010550835A CN102062285B CN 102062285 B CN102062285 B CN 102062285B CN 2010105508356 A CN2010105508356 A CN 2010105508356A CN 201010550835 A CN201010550835 A CN 201010550835A CN 102062285 B CN102062285 B CN 102062285B
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- flying disc
- main shaft
- static pressure
- turntable
- rotary table
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Abstract
The invention discloses a large precise differential dynamic and static pressure rotary table which comprises a rotary table, a flying disc, a base, a flying disc main shaft and a rotary table main shaft, wherein the upper end surface and lower end surface of the flying disc are all provided with static pressure oil chambers, and the peripheries of the static pressure oil chambers of the upper end surface and the lower end surface are all provided with dynamic pressure oil wedges; the rotary table is installed on the rotary table main shaft, and the rotary table main shaft is embedded in the inner hole of the flying disc main shaft; the flying disc is installed on the flying disc main shaft, and the flying disc main shaft is installed on the base; and the base is provided with an oil supply hole which supplies oil for the static pressure oil chambers of the upper end surface and lower end surface of the flying disc, and the lower side of the base is provided with a static pressure oil chamber which forms an closed type rotary table. In the invention, the relative velocity between motion interfaces can be improved through a differential method, the dynamic pressure carrying capacity and dynamic pressure rigidity are improved, the complete dynamic friction at a working state is realized, the low speed motion smoothness of the rotary table is improved, and the influence of the difference of the dynamic friction and the static friction on the indexing accuracy is solved effectively.
Description
Technical field
The present invention relates to the required large-sized low-speed precision rotating turntable of a kind of heavy machine tool and other heavy mechanical equipment, belong to large-scale precision mechanical automation equipment technology field.
Background technology
Rotary table is a key feature large-scale, heavy precision machine tool, like heavy-duty engine lathe, large gear cutting machine etc., in space flight, generating and large-scale measurement device, also is widely used.This type turntable volume is big, load is heavy, it is high that load-bearing rigidity and low speed rotating accuracy are required, and adopts the large-scale heavy duty thrust bearing, not only makes difficulty, costs an arm and a leg, and be easy to generate under the low speed and creep.Because turntable diameter is big; Can be operated under the extremely low rotating speed under a lot of situation, especially for the occasion of calibration, the pressure/dynamic-static pressure rotary technology relevant with the present invention; Under this low speed; Its dynamic pressure effect is very much limited, only leans on static pressure work often, can only improve rigidity by improving charge oil pressure or increasing loaded area.Like Chinese patent CN101407024A disclosed " high precision high rigidity closed type fluid static pressure/pressure/dynamic-static pressure rotary table "; Provided the method for another kind of raising rigidity; Be that install vertically a plurality of axially fix through a plurality of pivoted loops and bearing guide with loading bearing radially; If the equalizer bearing balance, the kinematic pair of a plurality of bearings is rotationally connected synchronously, and fixed joint connects through table base; The secondary sliding pair of journal bearing becomes the rigidity one to be synchronized with the movement with the bearing pair of cod, on its static relatively sliding surface of the sliding pair of each bearing oil pocket is arranged.
In the calibration occasion, existing turntable technology does not all solve the next crawling problems of difference band of sound friction.
Summary of the invention
The present invention is directed to that existing large-sized low-speed precision rotating turntable exists deficiency; A kind of large-scale precision differential dynamic and static pressure turntable is provided; This turntable has been realized the complete dynamic friction under the duty; Not only effectively improved dynamic pressure carrying and dynamic pressure rigidity, and efficiently solved of the influence of the difference of sound friction low speed motion stability and indexing accuracy.
Large-scale precision differential dynamic and static pressure turntable of the present invention adopts following technical solution:
This large-scale precision differential dynamic and static pressure turntable comprises turntable, flying disc, base, flying disc main shaft and turntable main shaft; The upper and lower end face of flying disc is equipped with the static pressure oil pocket, and the periphery of the static pressure oil pocket of both ends of the surface is equipped with the dynamic pressure oil film wedge; Turntable is installed on the turntable main shaft, and the turntable main shaft is nested in the endoporus of flying disc main shaft; Flying disc is installed on the flying disc main shaft, and the flying disc main shaft is installed on the base; Base is provided with the oil supplying hole into the static pressure oil pocket fuel feeding of flying disc upper and lower end face, and the base downside is provided with the static pressure oil pocket that constitutes Closed Rotary Table.
Base and the contacted one side of flying disc lower surface are provided with annular oil supply tank.
The course of work of above-mentioned large-scale precision differential dynamic and static pressure turntable is following:
On turntable main shaft and the flying disc main shaft drive is installed all, turntable and flying disc pass through the drive driven rotary on flying disc main shaft and the turntable main shaft respectively by independent separately motor.Through regulating and the velocity of rotation of control flying disc, no matter turntable speed what, can remain flying disc and turntable has a speed difference, thereby can in the friction pair of flying disc and turntable, form dynamic pressure oil film, differential dynamic pressure that Here it is formation principle.In addition, during work, can start flying disc earlier and rotate, the rotation of turntable begins on moving face like this, and this just starts static friction and has become the dynamic friction startup, has solved because sound friction poor movement velocity inequality (creeping) problem of bringing.Therefore, can effectively improve the low speed motion stability and the kinematic accuracy of turntable.
The present invention improves the relative velocity between moving interface through differential method; And raising dynamic pressure bearing capacity and dynamic pressure rigidity; Realized the complete dynamic friction under the duty, improved the low speed motion stability of turntable, effectively solved of the influence of the difference of sound friction indexing accuracy.
Description of drawings
Accompanying drawing is the structure principle chart of differential dynamic and static pressure turntable of the present invention.
Wherein: 1, turntable, 2, flying disc, 3, base, 4, the flying disc main shaft, 5, the turntable main shaft; 6, key, 7, key, 8, the static pressure oil pocket, 9, the static pressure oil pocket, 10, the static pressure oil pocket; 11, pressing plate, 13, oil supplying hole, 12, annular oil supply tank; 14, bearing, 15, drive, 16, rolling bearing, 17, drive.
The specific embodiment
Shown in accompanying drawing, large-scale precision differential dynamic and static pressure turntable of the present invention comprises turntable 1, flying disc 2, base 3, flying disc main shaft 4 and turntable main shaft 5.On the upper and lower end face of flying disc 2, be respectively equipped with static pressure oil pocket 8 and static pressure oil pocket 9, be provided with through hole so that fuel feeding between static pressure oil pocket 8 and the static pressure oil pocket 9.The periphery of static pressure oil pocket 8 and static pressure oil pocket 9 is equipped with the dynamic pressure oil film wedge.Turntable 1 is connected with turntable main shaft 5 through key 6; Flying disc 2 is connected with flying disc main shaft 4 through key 7.Turntable main shaft 5 is through rolling bearing 16 nested being installed in the flying disc main shaft 4, and flying disc main shaft 4 is fixed on the base 3 through bearing 14.Downside at base 3 is provided with the static pressure oil pocket 10 that constitutes Closed Rotary Table through pressing plate 11.Pressing plate 11 is connected with turntable 1 through screw.Base 3 is provided with the oil supplying hole 13 with static pressure oil pocket 9 fuel feeding, and base 3 is provided with annular oil supply tank 12 with the contacted one side in flying disc 2 lower surfaces.Oil supplying hole 13 is through the static pressure oil pocket 8 and static pressure oil pocket 9 fuel feeding of annular oil groove 12 for rotating.The oil supplying hole 13 of lubricating oil from base 3 flows into the interface of base 3 and flying disc 2, and through the inflow flying disc 2 of the through hole between flying disc 2 upper and lower end face static pressure oil pockets 8 and the static pressure oil pocket 9 and the interface of turntable 1.
Drive 17 is installed on the turntable main shaft 5, drive 15 is installed on the flying disc main shaft 4, drive 17 is belt wheel or gear with drive 15.Turntable 1 passes through drive 17 driven rotary on the turntable main shaft 5 by motor; Flying disc 2 passes through drive 15 driven rotary on the flying disc main shaft 4 by motor; Through regulating and the velocity of rotation of control flying disc 2, no matter turntable speed what, can remain flying disc 2 has a speed difference with turntable 1; Thereby can in the friction pair of flying disc 2 and turntable 1, form dynamic pressure oil film, differential dynamic pressure that Here it is forms principle.In addition, during work, can start flying disc 2 earlier and rotate, the rotation of turntable 1 begins on moving face like this, and this just starts static friction and has become the dynamic friction startup, has solved because sound friction poor movement velocity inequality (creeping) problem of bringing.Therefore, can effectively improve the low speed motion stability of turntable 1.
During work, with static pressure oil pocket 9 pressure oil is provided at first for the static pressure oil pocket 8 of the upper and lower surfaces of flying disc 2, promptly through static pressure flying disc 2 and turntable 1 is held up slightly earlier; Begin to rotate flying disc 2 then; When flying disc 2 arrives normal speed, can reduce charge oil pressure, mainly rely on dynamic pressure to carry.At this moment, can start turntable 1 as required rotates.
For example: the diameter 5m of turntable 1, the diameter 4.6m of flying disc 2; Between flying disc 2 diameter 3.5m and 4.3m, evenly offering cornerite is 6 static pressure oil pockets of 10 degree, if infeed 10kg/cm
2Oil pressure, then can hold up turntable and the live load of 81680kg.
If the rotating speed of flying disc 2 is 60r/mim, then the workspace outside diameter is 3.5mm even turntable 1 does not change the relative linear velocity that yet has 11m/s above, can form bigger oil film dynamic pressure in the dynamic pressure oil groove of offering.After turntable 1 has been dragged, reduce charge oil pressure, lean on the dynamic pressure can operate as normal, owing to dynamic pressure oil film thickness is thinner than static pressure oil film, and area be big, so very high dynamic pressure rigidity is arranged.At this moment, rotating if start turntable 1, then is on dynamic friction face, to start, and does not have stiction to exist, even extremely low turntable 1 rotating speed can not produce creeping phenomenon yet, therefore, the precision indexing that the stopping time changes when being particularly suitable for.
Claims (2)
1. a large-scale precision differential dynamic and static pressure turntable comprises turntable, flying disc, base, flying disc main shaft and turntable main shaft; It is characterized in that: the upper and lower end face of flying disc is equipped with the static pressure oil pocket, and the periphery of the static pressure oil pocket of both ends of the surface is equipped with the dynamic pressure oil film wedge; Turntable is installed on the turntable main shaft, and the turntable main shaft is nested in the endoporus of flying disc main shaft; Flying disc is installed on the flying disc main shaft, and the flying disc main shaft is installed on the base; Base is provided with the oil supplying hole into the static pressure oil pocket fuel feeding of flying disc upper and lower end face, and the base downside is provided with the static pressure oil pocket that constitutes Closed Rotary Table.
2. large-scale precision differential dynamic and static pressure turntable according to claim 1 is characterized in that: the contacted one side of base and flying disc lower surface is provided with annular oil supply tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105508356A CN102062285B (en) | 2010-11-19 | 2010-11-19 | Large precise differential dynamic and static pressure rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105508356A CN102062285B (en) | 2010-11-19 | 2010-11-19 | Large precise differential dynamic and static pressure rotary table |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102062285A CN102062285A (en) | 2011-05-18 |
| CN102062285B true CN102062285B (en) | 2012-08-08 |
Family
ID=43997692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105508356A Expired - Fee Related CN102062285B (en) | 2010-11-19 | 2010-11-19 | Large precise differential dynamic and static pressure rotary table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102062285B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333363A (en) * | 1976-12-29 | 1982-06-08 | A. Aoki & Associates | Index table assembly |
| US6457383B1 (en) * | 1999-09-28 | 2002-10-01 | Deckel Maho Pfronten Gmbh | Rotating or swiveling device of a machine tool |
| CN101407024A (en) * | 2008-11-25 | 2009-04-15 | 吴行飞 | High precision high rigidity closed type fluid static pressure / dynamic-static pressure rotary table |
| CN201863005U (en) * | 2010-11-19 | 2011-06-15 | 山东大学 | Large-scale precision differential dynamic and static pressure rotary table |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01135960A (en) * | 1987-11-20 | 1989-05-29 | Toyoda Mach Works Ltd | Table driving gear |
| JPH01228743A (en) * | 1988-03-08 | 1989-09-12 | Toyoda Mach Works Ltd | Slidable moving body support and guide device |
-
2010
- 2010-11-19 CN CN2010105508356A patent/CN102062285B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333363A (en) * | 1976-12-29 | 1982-06-08 | A. Aoki & Associates | Index table assembly |
| US6457383B1 (en) * | 1999-09-28 | 2002-10-01 | Deckel Maho Pfronten Gmbh | Rotating or swiveling device of a machine tool |
| CN101407024A (en) * | 2008-11-25 | 2009-04-15 | 吴行飞 | High precision high rigidity closed type fluid static pressure / dynamic-static pressure rotary table |
| CN201863005U (en) * | 2010-11-19 | 2011-06-15 | 山东大学 | Large-scale precision differential dynamic and static pressure rotary table |
Non-Patent Citations (2)
| Title |
|---|
| JP平1-135960A 1989.05.29 |
| JP平1-228743A 1989.09.12 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102062285A (en) | 2011-05-18 |
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20141119 |
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| EXPY | Termination of patent right or utility model |