CN102562828B - Controllable restrictor - Google Patents
Controllable restrictor Download PDFInfo
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- CN102562828B CN102562828B CN 201210032461 CN201210032461A CN102562828B CN 102562828 B CN102562828 B CN 102562828B CN 201210032461 CN201210032461 CN 201210032461 CN 201210032461 A CN201210032461 A CN 201210032461A CN 102562828 B CN102562828 B CN 102562828B
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Abstract
The present invention provides a controllable restrictor which comprises a restrictor base seat, a restriction column and a spring. The restrictor base seat is provided with echelon shape centre holes which comprise a major-diameter hole, a middle-diameter hole and a minor-diameter hole, and the major-diameter hole communicates with the minor-diameter hole through the middle-diameter hole. The restriction column is composed of a major-diameter column, a middle-diameter column and a minor-diameter column by connecting, and the restriction column is assembled in the restrictor base seat. The major-diameter column close fits with the major-diameter hole, a control oil cavity is formed between the top of the large-major column and the inner wall of the major-diameter hole, an oil-taking cavity is formed between the middle-diameter column and the major-diameter hole. The restrictor base seat is provided with an oil-taking passage communicated with the oil-taking cavity. A restriction gap communicated with the oil-taking cavity is formed between the middle-diameter column and the middle-diameter hole. An oil-collecting cavity is formed between the minor-diameter column and the middle-diameter hole, and the minor-diameter column close fits with the minor-diameter hole. The minor-diameter column is provided with an output passage communicated with the oil-collecting cavity. The spring bears against between the bottom of the middle-diameter column and the bottom of the middle-diameter hole. The controllable restrictor has a rapid dynamic response to the change of external loads, which can realize the active control for restriction parameters conveniently and accurately.
Description
Technical field
The present invention relates to the flow controller that hydrostatic pressure in precision, the ultra-precision machine tool, dynamic and hydrostatic bearing machine tool chief axis are used, relate in particular to controlled flow controller.
Background technique
Accurate, ultraprecise processing is Aero-Space optical component, defence equipment vital part and the indispensable means of high-grade civilian equipment key components and parts processing.Accurate, ultraprecise processing mainly depends on precision, ultra-precision machine tool.Hydrostatic pressure, dynamic and hydrostatic bearing machine tool chief axis are owing to have distinctive " error leveling effect ", dynamic pressure effect and damping vibration attenuation effect, its rotating accuracy is far above the rolling bearing type main shaft, its bearing capacity is far above the gas-static main shaft, thereby obtained extensive use in accurate, ultra-precision machine tool.
Hydrostatic pressure, dynamic and hydrostatic bearing can be divided into two kinds of quantitative fuel feeding and level pressure fuel feeding according to fuel system.Adopt the hydrostatic pressure of quantitative fuel feeding and the fields such as main shaft, workpiece spindle, turntable, guide rail and leading screw that dynamic and hydrostatic bearing is mainly used in the large-scale heavy duty lathe, its fuel delivery is big, the energy consumption height, and the metering pump quantity that is equipped with is many, and cost is also high.At present, in the accurate ultra machine tool field that has a large capacity and a wide range, generally adopt hydrostatic pressure and the dynamic and hydrostatic bearing of level pressure fuel feeding.
Adopt hydrostatic pressure and the dynamic and hydrostatic bearing of level pressure fuel feeding, essential reasonable disposition and use flow controller, just can make bearing bearing capacity, rigidity and precision be effectively played.At present the flow controller that adopts of hydrostatic pressure and dynamic and hydrostatic bearing can be divided into two kinds of fixed restriction device and variable restrictor devices.
The existing fixed throttle style has capillary-compensated, orifice restriction, anchor ring crevice throttle (cylndrical surface, end face, the conical surface) and surface throttle etc.Its common deficiency is that after oil pocket pressure raise, because the pressure difference before and after the throttling reduces, the fluid that causes entering oil pocket reduced, thereby the lifting amplitude of its bearing capacity and rigidity is very limited.
In order further to improve the bearing capacity of hydrostatic pressure and dynamic and hydrostatic bearing, the colleague has adopted variable restrictor device, existing variable restrictor mode that film feedback-throttling, guiding valve feedback throttling and the throttling of internal surface feedback etc. are arranged both at home and abroad.The deficiency of film feedback-throttling and the throttling of guiding valve feedback is: the physical dimension of (1) its flow controller is big, can only be placed on outside the bearing support, thereby the feedback oil circuit is longer, and is slower to the change dynamics response of external load, influenced the raising of dynamic stiffness; (2) restriction size causes the overall space increase that machine tool chief axis takies greatly; (3) flow controller all be the branch two-way respectively to opposed two oil pocket fuel feeding, the rigidity of opposed oil pocket is subjected to the influence of same flow controller parameter simultaneously, parameter was selected not at that time, was easy to cause the rigidity instability of axis system, caused the main shaft can't proper functioning.The deficiency of internal surface feedback throttling is: (1) need take the area of bearing oil inner cavity surface, causes the bearing axial dimension to become big, and for the little bearing of interior hole dimension, the internal surface throttling is difficult to processing; (2) owing to increased the area of internal surface, when causing main axis rotation, the shearing of internal surface and oil film heating increases, and bearing temperature rise raises, and is unfavorable for improving the high speed performance of main shaft.
In addition, no matter be said fixing flow controller or variable restrictor device, all there is a common deficiency, in case after namely flow controller was selected, its restriction characteristic was just decided, and can not adjust and change its restriction characteristic in the flow controller working procedure.
The throttle style that existing hydrostatic pressure, dynamic and hydrostatic bearing machine tool chief axis adopt causes failing at present fully to be used at lathe owing to there is above-mentioned defective, fails to realize the production in enormous quantities as the Elementary Function EF parts.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provides a kind of simple and compact for structure, to the response of the change dynamics of external load rapidly, has realized the ACTIVE CONTROL of throttling parameter and control is convenient, controlled flow controller accurately.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of controlled flow controller, comprise the flow controller seat, throttling post and spring, described flow controller seat is provided with stepped center hole, described stepped center hole is by hole, big footpath, middle hole, footpath and path hole are formed, the hole, footpath is communicated with the path hole in the aperture of described big footpath, described throttling post is by big footpath post, the stepped cylindrical that middle footpath post and path post connect to form, described throttling post is installed in the described flow controller seat, described big footpath post closely cooperates with hole, big footpath, described big footpath capital end surrounds the control oil pocket with hole, big footpath inwall, form oil suction chamber between footpath post and the hole, big footpath in described, offer the oil inlet passage that is communicated with oil suction chamber on the described flow controller seat, the throttle clearance that formation is communicated with oil suction chamber between footpath post and the hole, middle footpath in described, form collection chamber between described path post and the hole, middle footpath, described path post and path hole closely cooperate, and offer the output channel that is communicated with collection chamber on the described path post, and described spring supports to be located between middle post bottom, footpath and the bottom, hole, middle footpath.
Described oil inlet passage comprises annular oil supply and oil inlet hole, and described annular oil supply is located on the external cylindrical surface of flow controller seat, and described oil inlet hole is communicated with annular oil supply and oil suction chamber.
The external cylindrical surface of described flow controller seat is provided with screw thread.
Compared with prior art, the invention has the advantages that:
Controlled flow controller of the present invention feeds back oil circuit when self adaption is regulated short, rapid to the change dynamics response of external load, is conducive to improve dynamic stiffness, increases rigidity and the kinematic accuracy of bearing.In addition, controlled flow controller of the present invention also can be by regulating the oil pressure of control oil circuit from the outside, adjust the axial position of throttling post in the flow controller seat, change the length of throttle clearance on its axial direction of circular cylindrical, thereby change the throttling damping, satisfy the rigidity needs to greatest extent, this controlled flow controller is convenient, accurate to the throttling parameter control, control response speed is fast, is conducive to increase rigidity and the kinematic accuracy of bearing more.Controlled flow controller of the present invention is simpler more, compact, small and exquisite than film feedback-throttling device and guiding valve feedback flow controller structure, can directly be installed in the bearing support, be conducive to reduce the overall space that machine tool chief axis takies, and assembly process process good, be convenient to the seriation standardized production, reduce manufacture cost, convenient maintenance and replacement; Simultaneously, because controlled flow controller compact structure is small and exquisite, therefore can adopt each bearing static pressure oil pocket structure of a controlled flow controller of configuration separately, make that to change the precision that the self adaption do regulates at the pressure in the bearing static pressure oil pocket higher, avoided in the prior art simultaneously two opposed bearing static pressure oil pockets being carried out the self adaption adjusting with a flow controller and the unsettled phenomenon of axis system rigidity that causes.Controlled flow controller of the present invention is than the structure of internal surface feedback throttling, and its structure is simpler, processes more conveniently, and oil film is sheared the phenomenon of heating when not having main axis rotation, and bearing temperature rise is low, is conducive to improve the high speed performance of main shaft.
Description of drawings
Fig. 1 is main sectional structure schematic representation of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is installed in structural representation on the hydrodynamic journal liquid polymers with the present invention.
Fig. 4 is the B-B sectional view of Fig. 3.
Each label is represented among the figure:
1, flow controller seat; 2, throttling post; 3, spring; 4, control oil pocket; 5, oil suction chamber; 6, throttle clearance; 7, collection chamber; 8, output channel; 11, hole, big footpath; 12, hole, middle footpath; 13, path hole; 14, oil inlet passage; 21, big directly post; 22, middle footpath post; 23, path post; 91, control oil circuit; 92, bearing oil feeding line; 93, bearing static pressure oil pocket; 141, annular oil supply; 142, oil inlet hole.
Embodiment
Fig. 1 and Fig. 2 show a kind of controlled flow controller embodiment of the present invention, this controlled flow controller comprises flow controller seat 1, throttling post 2 and spring 3, flow controller seat 1 is provided with stepped center hole, stepped center hole is by hole, big footpath 11, middle hole 12, footpath and path hole 13 are formed, hole 12, footpath is communicated with path hole 13 in 11 warps of hole, big footpath, throttling post 2 is by big footpath post 21, the stepped cylindrical that middle footpath post 22 and path post 23 connect to form, throttling post 2 is installed in the flow controller seat 1, big footpath post 21 closely cooperates with hole 11, big footpath, post 21 tops, big footpath surround control oil pocket 4 with hole, big footpath 11 inwalls, form oil suction chamber 5 between middle footpath post 22 and the hole 11, big footpath, offer the oil inlet passage 14 that is communicated with oil suction chamber 5 on the flow controller seat 1, in formation is communicated with oil suction chamber 5 between footpath post 22 and the hole, middle footpath 12 throttle clearance 6, this throttle clearance 6 is column ringwise, form collection chamber 7 between path post 23 and the hole, middle footpath 12, collection chamber 7 is communicated with this throttle clearance 6, path post 23 closely cooperates with path hole 13, offer the output channel 8 that is communicated with collection chamber 7 on the path post 23, this output channel 8 is formed by connecting by two radial holes and an axial bore, between post 22 bottoms, footpath and 12 bottoms, hole, middle footpath, this spring 3 was used for auxiliary throttling post 2 to an end return of big footpath post 21 during spring 3 supported and is located at.Oil inlet passage 14 comprises annular oil supply 141 and oil inlet hole 142, and annular oil supply 141 is located on the external cylindrical surface of flow controller seat 1, and oil inlet hole 142 is communicated with annular oil supply 141 and oil suction chamber 5.The external cylindrical surface of flow controller seat 1 is provided with screw thread, is convenient to the connection of flow controller seat 1.
Below in conjunction with the hydrodynamic journal liquid polymers of main shaft in the ultra-precision machine tool, the working principle of the controlled flow controller of the present invention is described further:
As shown in Figure 3 and Figure 4, with pack into the hydrodynamic journal liquid polymers of main shaft in the ultra-precision machine tool of controlled flow controller of the present invention, make control oil pocket 4 and independently control oil circuit 91 and be connected, annular oil supply 141 is connected with the bearing oil feeding line 92 of hydrodynamic journal liquid polymers, output channel 8 is connected with bearing static pressure oil pocket 93.Control oil circuit 91 is control oil pocket 4 fuel feeding, bearing oil feeding line 92 is bearing static pressure oil pocket 93 fuel feeding, enter oil suction chamber 5 from the pressure oil of bearing oil feeding line 92 inputs evenly, fast through annular oil supply 141, oil inlet hole 142, after throttle clearance 6 throttlings, enter collection chamber 7 again, in collection chamber 7, assemble by the output channel 8 input bearing static pressure oil pockets 93 on the path post 23 through the pressure oil after the throttling.Controlled flow controller of the present invention can change according to the pressure in the bearing static pressure oil pocket 93 and carry out the self adaption adjusting, when the pressure in the bearing static pressure oil pocket 93 raises, throttling post 2 moves to big footpath post 21 1 ends, the length of throttle clearance 6 on its axial direction of circular cylindrical reduces, the resistance of throttling liquid reduces, and the liquid that enters bearing static pressure oil pocket 93 is further increased; When bearing static pressure oil pocket 93 pressure reduce, throttling post 2 moves to path post 23 1 ends, the length of the throttle clearance 6 of circular cylindrical on its axial direction increases, the resistance of throttling liquid increases, and the liquid that enters bearing static pressure oil pocket 93 is further reduced, and this shows, controlled flow controller of the present invention feeds back oil circuit when self adaption is regulated short, change dynamics response to external load is rapid, is conducive to improve dynamic stiffness, increases rigidity and the kinematic accuracy of bearing.In addition, controlled flow controller of the present invention also can be by regulating the oil pressure of control oil pocket 4 from the outside, adjust the axial position of throttling post 2 in flow controller seat 1, change the length of throttle clearance 6 on its axial direction of circular cylindrical, thereby change the throttling damping, satisfy the rigidity needs to greatest extent, this controlled flow controller is convenient, accurate to the throttling parameter control, control response speed is fast, is conducive to increase rigidity and the kinematic accuracy of bearing more.Controlled flow controller of the present invention is simpler more, compact, small and exquisite than film feedback-throttling device and guiding valve feedback flow controller structure, can directly be installed in the bearing support, be conducive to reduce the overall space that machine tool chief axis takies, and assembly process process good, be convenient to the seriation standardized production, reduce manufacture cost, convenient maintenance and replacement; Simultaneously, because controlled flow controller compact structure is small and exquisite, therefore can adopt each bearing static pressure oil pocket 93 structure of a controlled flow controller of configuration separately, make that to change the precision that the self adaption done regulates at the pressure in the bearing static pressure oil pocket 93 higher, avoided in the prior art simultaneously two opposed bearing static pressure oil pockets 93 being carried out the self adaption adjusting with a flow controller and the unsettled phenomenon of axis system rigidity that causes.Controlled flow controller of the present invention is than the structure of internal surface feedback throttling, and its structure is simpler, processes more conveniently, and oil film is sheared the phenomenon of heating when not having main axis rotation, and bearing temperature rise is low, is conducive to improve the high speed performance of main shaft.
Above-mentioned is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet is not in order to limit the present invention.Any those of ordinary skill in the art under the situation that does not break away from the technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all should drop in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment does according to the technology of the present invention essence.
Claims (3)
1. controlled flow controller, it is characterized in that: comprise flow controller seat (1), throttling post (2) and spring (3), described flow controller seat (1) is provided with stepped center hole, described stepped center hole is by hole, big footpath (11), middle hole (12), footpath and path hole (13) are formed, hole, footpath (12) is communicated with path hole (13) in the warp of hole, described big footpath (11), described throttling post (2) is by big footpath post (21), the stepped cylindrical that middle footpath post (22) and path post (23) connect to form, described throttling post (2) is installed in the described flow controller seat (1), described big footpath post (21) closely cooperates with big hole, footpath (11), described big footpath post (21) top surrounds control oil pocket (4) with hole (11), big footpath inwall, form oil suction chamber (5) between footpath post (22) and the big hole, footpath (11) in described, offer the oil inlet passage (14) that is communicated with oil suction chamber (5) on the described flow controller seat (1), the throttle clearance (6) that is communicated with oil suction chamber (5) of formation between footpath post (22) and the hole, middle footpath (12) in described, form collection chamber (7) between described path post (23) and the hole, middle footpath (12), described path post (23) closely cooperates with path hole (13), offer the output channel (8) that is communicated with collection chamber (7) on the described path post (23), described spring (3) supports to be located between middle post (22) bottom, footpath and the bottom, hole, middle footpath (12).
2. controlled flow controller according to claim 1, it is characterized in that: described oil inlet passage (14) comprises annular oil supply (141) and oil inlet hole (142), described annular oil supply (141) is located on the external cylindrical surface of flow controller seat (1), and described oil inlet hole (142) is communicated with annular oil supply (141) and oil suction chamber (5).
3. controlled flow controller according to claim 1 and 2, it is characterized in that: the external cylindrical surface of described flow controller seat (1) is provided with screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210032461 CN102562828B (en) | 2012-02-14 | 2012-02-14 | Controllable restrictor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210032461 CN102562828B (en) | 2012-02-14 | 2012-02-14 | Controllable restrictor |
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| Publication Number | Publication Date |
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| CN102562828A CN102562828A (en) | 2012-07-11 |
| CN102562828B true CN102562828B (en) | 2013-07-17 |
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| CN 201210032461 Active CN102562828B (en) | 2012-02-14 | 2012-02-14 | Controllable restrictor |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185005B (en) * | 2013-02-28 | 2015-12-23 | 杭州杭机股份有限公司 | Integrated form variable helical flow controller |
| CN106151274B (en) * | 2016-08-23 | 2019-05-14 | 苏州陈那自动化技术有限公司 | Two-part annular gap throttling set |
| CN106763190B (en) * | 2017-02-16 | 2018-12-11 | 西安建筑科技大学 | A kind of intelligent dynamic and hydrostatic bearing based on negative poisson's ratio structure |
| CN108326326B (en) * | 2018-02-02 | 2019-05-21 | 湖南大学 | A kind of intelligence electro spindle grinding processing method and system |
| CN110259836A (en) * | 2019-06-06 | 2019-09-20 | 厦门大学 | Throttling ratio real-time, tunable circular cone Slot Aperture Restrictor |
| CN110259825A (en) * | 2019-06-06 | 2019-09-20 | 厦门大学 | Throttling ratio real-time, tunable annular cylinder Slot Aperture Restrictor |
| CN110259826A (en) * | 2019-06-06 | 2019-09-20 | 厦门大学 | Throttling ratio real-time, tunable rectangle plane Slot Aperture Restrictor |
| CN110259837A (en) * | 2019-06-06 | 2019-09-20 | 厦门大学 | Throttling ratio real-time, tunable planar rectangular ring Slot Aperture Restrictor |
| CN113118796B (en) * | 2021-03-09 | 2022-07-26 | 广州市昊志机电股份有限公司 | External-rotating internal-cooling knife handle |
| CN113446315B (en) * | 2021-07-20 | 2022-06-03 | 华中科技大学 | Adjustable annular small-hole throttler and static pressure support system |
| CN113618421B (en) * | 2021-08-20 | 2024-03-22 | 通用技术集团机床工程研究院有限公司 | Modularized sliding block device and ultra-precise hydrostatic guideway unit using same |
| CN114857174B (en) * | 2022-06-16 | 2023-07-04 | 中国工程物理研究院机械制造工艺研究所 | Anti-disturbance restrictor for hydrostatic bearing and hydrostatic guideway |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1314067A (en) * | 1969-04-29 | 1973-04-18 | Consiglio Nazionale Ricerche | Fluid bearings |
| CH606852A5 (en) * | 1975-12-02 | 1978-11-15 | Escher Wyss Ag | |
| CA1096431A (en) * | 1978-07-03 | 1981-02-24 | Kunio Shibata | Fluid bearing |
| JP4134541B2 (en) * | 2000-09-25 | 2008-08-20 | 株式会社ジェイテクト | Fluid bearing |
| CN202520799U (en) * | 2012-02-14 | 2012-11-07 | 湖南大学 | Controllable throttle device |
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2012
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