CN201293044Y - High speed principal axis liquid plain bearing end plane throttle structure - Google Patents
High speed principal axis liquid plain bearing end plane throttle structure Download PDFInfo
- Publication number
- CN201293044Y CN201293044Y CNU2008201590383U CN200820159038U CN201293044Y CN 201293044 Y CN201293044 Y CN 201293044Y CN U2008201590383 U CNU2008201590383 U CN U2008201590383U CN 200820159038 U CN200820159038 U CN 200820159038U CN 201293044 Y CN201293044 Y CN 201293044Y
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- bearing
- oil
- main shaft
- communicated
- throttling
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Abstract
The utility model discloses a high speed main shaft liquid sliding bearing end face throttling structure which comprises a pressure oil chamber arranged on the inner wall of the main shaft bearing, an oil inlet hole of a shaft block arranged outside the main shaft bearing, a throttling clearance, an oil inlet channel arranged on the main shaft bearing, and an oil feeding channel of the pressure oil chamber, wherein the throttling clearance consists of a throttling terrace on the end face of the main shat bearing, and a clearance installed between gaskets on the inner surface of a bearing end closure, one end of the oil inlet channel is communicated with the oil feeding hole of the shaft block, the other end is communicated with the throttling clearance, one end of the oil feeding channel of the pressure oil chamber is communicated with the throttling clearance, and the other end is communicated with the pressure oil chamber. The high speed main shaft liquid sliding bearing end face throttling structure has reasonable structure, is convenient to clean the throttling clearance and adjust and control the throttling ratio, simplifies the debugging process, saves the maintenance time and lowers the cost.
Description
Technical field
The utility model belongs to mechanical manufacturing field, is specifically related to end face throttling structure of high speed principal shaft liquid sliding bearing.
Background technique
With high cutting speed, high feed speed, high manufacturing accuracy is that the high speed and precision processing of major character is one of four big advanced manufacturing technologies in the present age, is to make manufacturing technology produce the new and high technology that revolutionary character for the second time leaps continue Numeric Control Technology after.The high speed and precision working machine tool not only has high manufacturing efficiency, and can improve the machining accuracy and the surface quality of part significantly.The main shaft of high-speed precise machine tool is as the Core Feature parts, and the height of its performance directly has influence on the overall development level of high speed and precision working machine tool.
The bearing that is used for the high speed and precision main shaft comprises magnetic suspension bearing, pneumatic bearing, rolling bearing and liquid sliding bearing etc., wherein, liquid sliding bearing is because the effect that bearing capacity is strong, lubricant medium has damping vibration attenuation and " homogenizing " error, therefore adopt liquid sliding bearing as the machine tool chief axis good rigidly, the rotating accuracy height that support, be very suitable for spindle unit as precision machine tool such as precision grinder and precision boring machine.Liquid sliding bearing generally adopt at present the throttling form have: the anchor ring crevice throttle of orifice restriction, capillary-compensated, tapered or column type, film feedback-throttling etc., but above each defectiveness of throttling form.
The defective of orifice restriction: at first, orifice restriction device difficulty of processing is big, and the throttling cross section is little, stops up easily; Secondly, the flow of orifice restriction device and oil viscosity are irrelevant owing to flow through, and the flow of the bearing of flowing through is inversely proportional to viscosity, so use the static pressure/dynamic and hydrostatic bearing of orifice restriction, its bearing play and support stiffness and viscosity and temperature correlation, when the oil film temperature raise, the bearing performance instability should not be used for the big occasion of temperature variation.
The defective of capillary-compensated: capillary restrictor is divided into straight-through circular section formula and spiral groove type non-circular cross-section formula.The former is owing to guarantee that the required capillary pipe length of laminar flow condition is longer, so installing space is bigger, and the situation that general only suitable bearing rotating speed is lower (film viscosity is bigger at this moment, guarantees laminar flow easily); Latter's installing space is less relatively and the resistance of throttling liquid is adjustable, but complex structure, often multi-head spiral groove is directly opened on the outer cylinder surface of bearing, oil pocket of every spiral chute control, thereby the quality of foundry goods and the quality of processing in hole had relatively high expectations, the requirement on machining accuracy of flow controller damping groove face is also high simultaneously.
The defective of film feedback-throttling: the number of parts of film throttling device is more, generally by last lower shell body, and compositions such as copper backing, thin slice, the machining accuracy height, the assembling and setting workload is big, thereby the cost height; The pipeline of oil stream process is longer after the throttling, and is careless slightly as if designing or assembling, and just forms aeroembolism easily, influences dynamic oil film rigidity and transient characteristic; The membrane structure parameter designing film vibration can be because of feedback sensitivity is too high occur not at that time, sends wild effects such as " whistles "; It is big to take up room, and for middle-size and small-size lathe, often uses and is restricted owing to structure.
The defective of the anchor ring crevice throttle of tapered or column type: throttleng surface stops up easily, and is difficult to maintenance after stopping up, and needs the dismounting bearing and grinds throttle clearance on the bearing top circle face again; And owing to destroyed the junction plane of bearing top circle and bearing support behind the bearing removal, also can only join new bearing support after the bearing that causes disassembling keeps in repair and to use, perhaps need to process the alternative bearing that disassembles of new bearing; This causes the main shaft service cycle long, has improved user's user cost.
In addition, in the engineering design, static pressure/dynamic and hydrostatic bearing structural parameter all are recently to design and select according to best throttling, yet part exists machining error and measurement error, in the assembling and setting process, throttling often occurs than the situation that departs from best throttling ratio.At present, there are two kinds at the treatment measures of this situation: the one, be cost with the oil film rigidity of losing a part of bearing, the throttling ratio is controlled in certain scope; The 2nd, process flow controller again and try to gather best throttling ratio, but this not only influences the assembling and setting progress, and still difficulty makes the throttling ratio reach optimum value, in some structure, change flow controller again and also need repeatedly dismounting main shaft, the main shaft dynamic balance accuracy will be reduced.
In sum, the throttle style that adopts in the liquid sliding bearing of high speed and precision main shaft at present causes liquid sliding bearing to fail fully to be used on precision machine tool owing to there is above-mentioned defective.
The model utility content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, provide a kind of rational in infrastructure, be convenient to throttle clearance clear up, be convenient to adjust and control throttling than, can simplify the debugging operation, save the end face throttling structure of high speed principal shaft liquid sliding bearing of maintenance time and cost.
For solving the problems of the technologies described above, the utility model by the following technical solutions.
A kind of end face throttling structure of high speed principal shaft liquid sliding bearing, comprise pressure oil cavity set on the inwall of main shaft bearing and be sheathed on set bearing support oil inlet hole on the outer bearing support of main shaft bearing, also comprise throttle clearance, be located at oil inlet passage and pressure oil cavity oil supply gallery on the main shaft bearing, described throttle clearance is made of the space between main shaft bearing and the bearing (ball) cover, oil inlet passage one end is communicated with the bearing support oil inlet hole, the other end is communicated with throttle clearance, pressure oil cavity oil supply gallery one end is communicated with throttle clearance, and the other end is communicated with pressure oil cavity.
Described oil inlet passage comprises bearing oil inlet hole and throttle clearance oil-feed annular groove, described throttle clearance oil-feed annular groove is located at the end face of main shaft bearing, and be communicated with throttle clearance, described bearing oil inlet hole one end is communicated with the bearing support oil inlet hole, and the other end is communicated with throttle clearance oil-feed annular groove.
Described throttle clearance oil-feed annular groove is provided with two circles, and the end face of main shaft bearing is provided with the connectivity slot that is communicated with two circle throttle clearance oil-feed annular grooves, and the end face of main shaft bearing is separated out at least one throttling platform by throttle clearance oil-feed annular groove and connectivity slot.
Described throttle clearance is made of the space between the pad of main shaft bearing and bearing (ball) cover inboard.
Compared with prior art, advantage of the present utility model is: throttle clearance is arranged on the main shaft bearing end face, needs to throttle clearance adjust, when safeguarding, only need bearing (ball) cover is separated from bearing support, and do not need main shaft bearing is disassembled from bearing support, thereby reduced workload, saved time and cost; Adjust throttling than the time, only need to change bearing (ball) cover or bearing (ball) cover is repaired by an end of throttle clearance, can realize control by the size of adjusting throttle clearance to the throttling ratio.The utility model also is provided with throttle clearance oil-feed annular groove at the end face of main shaft bearing, can make stream oil be full of whole throttle clearance uniformly; This throttle clearance oil-feed annular groove can be made as two circles, and is communicated with by connectivity slot, and the end face with main shaft bearing is separated out independently throttling platform simultaneously, for pressure oil cavity provides pressure stable oil.The bearing (ball) cover inboard is provided with pad, adjust throttling than the time only need change or repair to the pad on the bearing (ball) cover, can reduce debugging, maintenance cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that the A of Fig. 1 is to view (remove bearing (ball) cover and pad).
Each label is represented among the figure:
1, bearing support 2, main shaft bearing
3, bearing (ball) cover 4, main shaft
5, throttle clearance 6, pad
11, bearing support oil inlet hole 12, drainback passage
21, pressure oil cavity 22, oil inlet passage
23, pressure oil cavity oil supply gallery 31, spill port
221, bearing oil inlet hole 222, throttle clearance oil-feed annular groove
223, connectivity slot 224, circular groove
225, throttling platform
Embodiment
As depicted in figs. 1 and 2, end face throttling structure of high speed principal shaft liquid sliding bearing of the present utility model, comprise pressure oil cavity set on the inwall of main shaft bearing 2 21 and be sheathed on set bearing support oil inlet hole 11 on main shaft bearing 2 bearing support 1 outward, also comprise throttle clearance 5, be located at oil inlet passage 22 and pressure oil cavity oil supply gallery 23 on the main shaft bearing 2, throttle clearance 5 is made of the space between the pad 6 of main shaft bearing 2 and bearing (ball) cover 3 inboards, pad 6 is fixed on the bearing (ball) cover 3 by fastening piece, bearing (ball) cover 3 is fixed on the bearing support 1 by fastening piece, oil inlet passage 22 1 ends are communicated with bearing support oil inlet hole 11, the other end is communicated with throttle clearance 5, pressure oil cavity oil supply gallery 23 1 ends are communicated with throttle clearance 5, and the other end is communicated with pressure oil cavity 21.Oil inlet passage 22 comprises bearing oil inlet hole 221 and is located at main shaft bearing 2 end faces, the two circle throttle clearance oil-feed annular grooves 222 that are communicated with throttle clearance 5, two circle throttle clearance oil-feed annular grooves 222 are communicated with by four set on main shaft bearing 2 end faces connectivity slots 223, bearing oil inlet hole 221 1 ends are communicated with bearing support oil inlet hole 11 by the circular groove 224 of being located at main shaft bearing 2 outer walls, the other end is communicated with throttle clearance oil-feed annular groove 222, simultaneously two circle throttle clearance oil-feed annular grooves 222 and four connectivity slots 223 are separated out four independently throttling platforms 225 with the end face of main shaft bearing 2, for pressure oil cavity 21 provides pressure stable oil.Also be provided with spill port 31 on the bearing (ball) cover 3, bearing support 1 is provided with drainback passage 12, and spill port 31 is communicated with drainback passage 12.The stream oil that enters main shaft bearing 2 from bearing support oil inlet hole 11 enters bearing oil inlet hole 221 through circular groove 224, enter a throttle clearance oil-feed annular groove 222 from bearing oil inlet hole 221 again, after this, enter another throttle clearance oil-feed annular groove 222 through connectivity slot 223, be full of simultaneously whole throttle clearance 5 uniformly, be delivered to pressure oil cavity 21 by the pressure oil after throttle clearance 5 throttlings through pressure oil cavity oil supply gallery 23, between main shaft bearing 2 and main shaft 4, form the pressure oil film, the stream oil that releases from bearing (ball) cover 3 one ends flows into drainback passage 12 through spill port 31, is reclaimed by drainback passage 12.
The utility model is arranged on throttle clearance 5 end face of main shaft bearing 2, needs to throttle clearance 5 adjust, when safeguarding, only need bearing (ball) cover 3 is separated from bearing support 1, and do not need main shaft bearing 2 is disassembled from bearing support 1, thereby reduced workload, saved time and cost; Adjust throttling than the time, only need change or repair to the pad on the bearing (ball) cover 36, can realize control by the size of adjusting throttle clearance 5 to the throttling ratio, not only convenient and swift, and can reduce debugging, maintenance cost.
Claims (4)
1, a kind of end face throttling structure of high speed principal shaft liquid sliding bearing, comprise pressure oil cavity set on the inwall of main shaft bearing (2) (21) and be sheathed on the outer bearing support (1) of main shaft bearing (2) and go up set bearing support oil inlet hole (11), it is characterized in that: also comprise throttle clearance (5), be located at oil inlet passage (22) and pressure oil cavity oil supply gallery (23) on the main shaft bearing (2), described throttle clearance (5) is made of the space between main shaft bearing (2) and the bearing (ball) cover (3), oil inlet passage (22) one ends are communicated with bearing support oil inlet hole (11), the other end is communicated with throttle clearance (5), pressure oil cavity oil supply gallery (23) one ends are communicated with throttle clearance (5), and the other end is communicated with pressure oil cavity (21).
2, end face throttling structure of high speed principal shaft liquid sliding bearing according to claim 1, it is characterized in that: described oil inlet passage (22) comprises bearing oil inlet hole (221) and throttle clearance oil-feed annular groove (222), described throttle clearance oil-feed annular groove (222) is located at the end face of main shaft bearing (2), and be communicated with throttle clearance (5), described bearing oil inlet hole (221) one ends are communicated with bearing support oil inlet hole (11), and the other end is communicated with throttle clearance oil-feed annular groove (222).
3, end face throttling structure of high speed principal shaft liquid sliding bearing according to claim 2, it is characterized in that: described throttle clearance oil-feed annular groove (222) is provided with two circles, the end face of main shaft bearing (2) is provided with the connectivity slot (223) that is communicated with two circle throttle clearance oil-feed annular grooves (222), and the end face of main shaft bearing (2) is separated out at least one throttling platform (225) by throttle clearance oil-feed annular groove (222) and connectivity slot (223).
4, according to each described end face throttling structure of high speed principal shaft liquid sliding bearing in the claim 1 to 3, it is characterized in that: described throttle clearance (5) is made of the space between the pad (6) of main shaft bearing (2) and bearing (ball) cover (3) inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201590383U CN201293044Y (en) | 2008-11-04 | 2008-11-04 | High speed principal axis liquid plain bearing end plane throttle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201590383U CN201293044Y (en) | 2008-11-04 | 2008-11-04 | High speed principal axis liquid plain bearing end plane throttle structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201293044Y true CN201293044Y (en) | 2009-08-19 |
Family
ID=41006521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201590383U Expired - Lifetime CN201293044Y (en) | 2008-11-04 | 2008-11-04 | High speed principal axis liquid plain bearing end plane throttle structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201293044Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403415B (en) * | 2008-11-04 | 2010-06-09 | 湖南大学 | End face throttling structure of high speed principal shaft liquid sliding bearing |
| CN102328882A (en) * | 2011-07-08 | 2012-01-25 | 江苏秋林重工股份有限公司 | Adjustable bearing box |
| US10054161B1 (en) | 2017-06-09 | 2018-08-21 | National Tsing Hua University | Membrane restrictor and hydrostatic bearing module |
| CN108691897A (en) * | 2018-08-06 | 2018-10-23 | 洛阳易特轴承有限公司 | A kind of axial filmatic bearing for UGI coal gasification burners |
| CN108691898A (en) * | 2018-08-06 | 2018-10-23 | 洛阳易特轴承有限公司 | A kind of bearing group for UGI coal gasification burners |
-
2008
- 2008-11-04 CN CNU2008201590383U patent/CN201293044Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403415B (en) * | 2008-11-04 | 2010-06-09 | 湖南大学 | End face throttling structure of high speed principal shaft liquid sliding bearing |
| CN102328882A (en) * | 2011-07-08 | 2012-01-25 | 江苏秋林重工股份有限公司 | Adjustable bearing box |
| US10054161B1 (en) | 2017-06-09 | 2018-08-21 | National Tsing Hua University | Membrane restrictor and hydrostatic bearing module |
| TWI641768B (en) * | 2017-06-09 | 2018-11-21 | 國立清華大學 | Membrane restrictor and hydrostatic bearing module |
| CN108691897A (en) * | 2018-08-06 | 2018-10-23 | 洛阳易特轴承有限公司 | A kind of axial filmatic bearing for UGI coal gasification burners |
| CN108691898A (en) * | 2018-08-06 | 2018-10-23 | 洛阳易特轴承有限公司 | A kind of bearing group for UGI coal gasification burners |
| CN108691897B (en) * | 2018-08-06 | 2023-12-01 | 鄂托克旗新航焦化有限公司 | Application method of axial oil film bearing for UGI coal gasification furnace |
| CN108691898B (en) * | 2018-08-06 | 2024-02-02 | 洛阳易特轴承有限公司 | Bearing group for UGI coal gasification furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090819 Effective date of abandoning: 20081104 |