CN102262905A - Clearance eliminating precision guide displacement device - Google Patents
Clearance eliminating precision guide displacement device Download PDFInfo
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- CN102262905A CN102262905A CN 201110100605 CN201110100605A CN102262905A CN 102262905 A CN102262905 A CN 102262905A CN 201110100605 CN201110100605 CN 201110100605 CN 201110100605 A CN201110100605 A CN 201110100605A CN 102262905 A CN102262905 A CN 102262905A
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- 238000006073 displacement reaction Methods 0.000 title abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000033001 locomotion Effects 0.000 abstract description 10
- 238000005096 rolling process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
A gap eliminating precision guide displacement device comprises a gap eliminating structure and a cylindrical movable guide rail structure, wherein a gap eliminating plate is used for eliminating a gap between a screw rod and a nut ring, and the screw rod and the nut ring with the gap eliminated are fixed on a bearing frame by 2 thrust bearings; the bearing frame is fixed with the motor base, and the double-shaft motor fixed on the motor base is connected with the screw rod by a coupling; 3V-shaped grooves are uniformly distributed on the circumference of the cylindrical movable guide rail, the lower V-shaped groove is matched with the V-shaped fixed guide rail, a steel ball is arranged between the V-shaped grooves and the V-shaped fixed guide rail, and the steel ball is separated by a retainer; the two sliding rails are matched with the two V-shaped grooves, a steel ball is arranged between the V-shaped grooves and the sliding rails, the steel ball is separated by a retainer, and flat end fastening screws on the sliding rails and the fixed guide rails are adjusted. The invention greatly improves the technical parameter indexes such as repeated positioning precision, straightness accuracy, motion parallelism and the like.
Description
Technical field
The present invention relates to a kind of gap accurate guiding gearshift that disappears.
Background technology
At present, rectilinear motion commonly used mainly is to finish by the straight-line displacement of guide rail in the optical instrument.The principal mode of guide rail has sliding friction guide rail and rolling friction guide rail, and its effect is that movement parts is supported and guiding.The guiding accuracy height, move light steadily, the wearing quality height, load-bearing capacity is big, it conveniently is basic demand to guide rail that disappear gap and processing are debug.It is all fairly simple that the sliding friction guide rail holds the processing and the check of guide face, but maximum shortcoming is that the gap can not be adjusted, can not be with the method compensation of adjusting after the wearing and tearing, and also relatively more responsive to variation of temperature.Though and existing rolling guide is lower to the susceptibility of temperature variation, very high to the requirement on machining accuracy of guide pass, and need three guide rails altogether, and two quiet guide rails, a moving guide rail, very difficulty is adjusted in the gap between the dynamic and static guide rail.Along with the reach of science and modern progress, the precision of optical instrument and accuracy and adjusting process are had higher requirement the real-time focusing in the optical instrument telescopic system for example, hi-Fix etc. in the litho machine.Therefore, existing guide rail structure form can not satisfy the developing steps of present optical instrument.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, a kind of gap accurate guiding gearshift that disappears is provided, eliminated the movement clearance between screw mandrel and the nut effectively, improved the guide rail rectilinearity; Have the resetting height in addition, wearing quality height, the advantage that loading capability is big.
Technical solution of the present invention: a kind of gap accurate guiding gearshift that disappears, comprise disappear interstitial structure and the cylindrical moving guide rail structure of V-arrangement, the interstitial structure that disappears comprises motor 1, motor cabinet 3, bearing bracket stand 5, shaft coupling 6, the gap plate 7 that disappears, screw ring 9, screw mandrel 10, bearing briquetting 14, first thrust bearing 16 and second thrust bearing 18; The cylindrical movable guiding rail structure of V-arrangement comprise cylindrical moving guide rail 11, V-type decide guide rail 22 and two slip rails 25,26, bikini fixed mount 23, flush end holding screw 24,24 ', 24 ", steel ball 29,29 ', 29 "; The motor 1 that is fixed on the motor cabinet 3 is connected with screw mandrel 10 by shaft coupling 6; Bearing bracket stand 5 is fixed on the motor cabinet 3, and first thrust bearing 16 and second thrust bearing 18 are installed in the two ends of bearing bracket stand 5, and screw mandrel 10 is installed on first thrust bearing 16 and second thrust bearing, 18 inner rings; Bearing briquetting 14 is fixed on the screw mandrel 10, adjusts bearing briquetting 14 inner ring of screw mandrel 10 and first thrust bearing 16 and second thrust bearing 18 is closely cooperated; The screw ring 9 and the gap plate 7 that disappears, and tighten up the screw ring 9 and the gap plate 7 that disappears on screw mandrel 10 by threaded engagement; Screw ring 9 is fixed together with cylindrical moving guide rail 11; Uniform three V-shaped groove a, b, the c of having on the circumference of cylindrical moving guide rail 11, a following V-shaped groove a cooperates with the guide rail 22 of deciding of V-type, is placed with steel ball 29 between the two, adopts first retainer 31 with steel ball 29 separately; What cooperate with two V-type grooves above the cylindrical moving guide rail 11 is two slip rails 25,26, between other two V-type groove b, c and two slip rails 25,26, be placed with steel ball 29 ', 29 "; adopt two other retainer 32,33 with steel ball 29 ', 29 " separately, V-type decides guide rail 22 and two slip rails 25,26 are fixed on the bikini fixed mount 23, flush end holding screw 24 ', 24 " be positioned on two slip rails 25,26, adjust flush end holding screw 24,30 and eliminate cylindrical moving guide rails 11 and decide gap between the guide rail 22.
At described two ends of deciding guide rail 22 limit switch 37,38 is housed, when cylindrical moving guide rail 11 moved to the two ends extreme position, the limit switch 37,38 at two ends sent signal, and motor 1 is stopped operating, and improved bearing accuracy.
Front end face at described cylindrical moving guide rail 11 is equipped with X to ring flange 27, can be used as the focusing of optical instrument; Y is housed to ring flange 28 in the upper surface of described cylindrical movable guiding rail 11, uses as work stage.
Be fixed with in described bearing bracket stand 5 upper ends and be used for dustproof bearing cap 15.
The other end at described motor shaft is equipped with handwheel 21, is convenient to debugging on the one hand, can be used as an interface on the other hand, conveniently links to each other with angular encoder.
Principle of the present invention: the present invention has comprised the interstitial structure that disappears, and after with the gap plate that disappears the gap of screw mandrel and screw ring being eliminated, with 2 thrust bearings the screw mandrel and the screw ring in the gap that disappeared is fixed on the bearing bracket stand.Bearing bracket stand and motor cabinet are fixed together, and the dual-axle motor and the screw mandrel that will be fixed on the motor cabinet with shaft coupling link.The screw ring is fixed together with screw and cylindrical moving guide rail.Uniformly on the circumference of cylindrical moving guide rail have 3 V-shaped grooves, following V-shaped groove cooperates with the guide rail of deciding of 1 V-type, is placed with steel ball between them, with retainer steel ball is separated.What cooperate with top two V-type grooves is two slip rails, between V-type groove and slip rail, be placed with steel ball, with retainer steel ball is separated, adjust slip rail and the flush end holding screw of deciding on the guide rail, eliminate cylindrical moving guide rail and decide gap between the guide rail, make comfortable, steady, the no catching phenomenon of movable guiding rail motion.Cylindrical moving guide rail has been transformed into the rotation of motor and screw mandrel the rectilinear motion of guide rail.In addition, at the two ends of deciding guide rail limit switch is housed, after moving guide rail movement put in place, limit switch sent signal, and motor stops operating.Grating chi interface board, grating ruler reading head, grating chi are installed on the fixed mount, to improve the bearing accuracy of displacement guide piece.For the ease of debugging, handwheel is housed at the other end of motor.
The present invention has the following advantages compared with prior art:
(1) interstitial structure that disappears has been installed in the present invention additional, employing disappears after the gap elimination of gap plate with screw mandrel and screw ring, with 2 thrust bearings the screw mandrel and the screw ring in the gap that disappeared are fixed on the bearing bracket stand, have eliminated the movement clearance between screw mandrel and the nut, improved the guide rail rectilinearity.
(2) the cylindrical movable guiding rail of the present invention and the gap of deciding between the guide rail reach optimum condition by the screw of adjusting the slip rail and decide on the guide rail, thereby have further improved the rectilinearity of inventing, and make repetitive positioning accuracy, and technical parameters such as wearing quality increase.
Description of drawings
Fig. 1 is the partial view of the gap accurate guiding gearshift that disappears of the present invention;
Fig. 2 is the front view of the gap accurate guiding gearshift that disappears of the present invention;
Fig. 3 is the A-A view of the gap accurate guiding gearshift that disappears of the present invention;
Fig. 4 is the vertical view of the gap accurate guiding gearshift that disappears of the present invention;
Among the figure: 1 motor, 2 screws, 3 motor cabinets, 4 screws, 5 bearing bracket stands, 6 shaft couplings, 7 gap plates that disappear, 8 screws, 9 screw rings, 10 screw mandrels, 11 cylindrical moving guide rails, 12 sunk screws, 13 sunk screws, 14 bearing briquettings, 15 bearing caps, 16 first thrust bearings, 17 screws, 18 second thrust bearings, 19 straight pins, 20 straight pins, 21 handwheels, 22V type guide rail, 23 bikini fixed mounts, 24 flush ends are adjusted screw, 25,26 slip rails, 27X is to ring flange, 28Y is to ring flange, and 29,29 ', 29 " be steel ball, 30 flush end holding screws; 31～33 retainers, 34 grating chi interface boards, 35 grating ruler reading heads; 36 grating chis, 37 limit switches, 38 limit switches.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the present invention's example is implemented to comprise: motor 1, screw 2, motor cabinet 3, screw 4, bearing bracket stand 5, shaft coupling 6, the gap plate 7 that disappears, screw 8, screw ring 9, screw mandrel 10, cylindrical moving guide rail 11, sunk screw 12, sunk screw 13, bearing briquetting 14, bearing cap 15, the first thrust bearings 16, screw 17, second thrust bearing 18, straight pin 19, straight pin 20, handwheel 21.V-type is decided guide rail 22, bikini fixed mount 23, flush end adjust screw 24,24 ', 24 "; slip rail 25,26, X are to ring flange 27, and Y is to ring flange 28; steel ball 29,29 ', 29 ", flush end holding screw 30, retainer 31,32,33, grating chi interface board 34, grating ruler reading head 35, grating chi 36, the first limit switches 37, the second limit switches 38.
With screw 2 motor 1 (adopt duplex bearing motor) is fixed on the motor cabinet 3, the left side axle of motor 1 and the right-hand member of shaft coupling 6 with link, shaft coupling 6 left ends link with the right-hand member of straight pin 19 and screw mandrel 10.With screw 4 bearing bracket stand 5 is fixed on the motor cabinet 3,2 thrust bearings 16,18 are installed in the two ends of bearing bracket stand 5, and then screw mandrel 10 is installed on 2 thrust bearings, 16,18 inner rings, to adjust bearing briquetting 14 with screw 13 is fixed on the screw mandrel 10, adjustment bearing briquetting 14 closely cooperates the inner ring of screw mandrel 10 and 2 thrust bearings 16,18, with sunk screw 12 bearing cap 15 is fixed on the bearing bracket stand 5 to be used to prevent dust.Screw ring 9, the gap plate 7 that disappears, tighten up the screw ring 9 and the gap plate 7 that disappears with screw 17 on screw mandrel 10 by threaded engagement.Manual during for the ease of debugging, handwheel 21 usefulness straight pins 20 are connected on the another one axle of motor 1.With screw 8 screw ring 9 and cylindrical moving guide rail 11 are fixed together, adjust screw 24,24 ' and 24 " 1 V-type is decided guide rail 22 and two slip rails 25,26 are fixed on the bikini fixed mount 23 with flush end.With steel ball 29,29 ', 29 " be placed on respectively on 3 retainers 31,32,33, retainer 31 is placed on cylindrical moving guide rail 11 and V-type is decided between the guide rail 22, and retainer 32,33 is placed between cylindrical moving guide rail 11 and two the slip rails 25,26.In addition, limit switch 37,38 is housed at the two ends of guide rail, after cylindrical moving guide rail 11 motions put in place, limit switch 37 or 38 sent signal, and motor 1 stops operating.Grating chi interface board 34, grating ruler reading head 35, grating chi 36 are installed on the bikini fixed mount 23, to improve the bearing accuracy of displacement guide piece.
Rotate motor 1 energising back, and the inner ring that drives 2 thrust bearings 16,18 by shaft coupling 6 is along with screw mandrel 10 rotates together, and the screw ring 9 and the gap plate 7 that disappears are mobile on screw mandrel 10.Because cylindrical moving guide rail 11 is to link together with screw 8 and screw ring 9, cylindrical moving guide rail 11 is decided to do translation along directions X between guide rail 22 and two slip rails 25,26 in V-type.Between cylindrical moving guide rail 11 and V-type rail 22 and two slip rails 25,26, be placed with steel ball 29,29 ', 29 " and fixed mount 31,32,33, steel ball 29,29 ', 29 " be placed in the circular port of fixed mount 31,32,33.With flush end holding screw 24,24 ', 24 ", 30 adjust V-types and decide gap between guide rail 22, slip rail 25 and the cylindrical moving guide rail 11, make cylindrical moving guide rail 11 comfortable, steady, the no catching phenomenon of moving.After work a period of time, cylindrical moving guide rail 11 decides guide rail 22 with V-type and steel ball 29 all can have some wearing and tearing, the guiding accuracy of guide rail will some reduction, at this moment only need to adjust flush end holding screw 24 on two slip rails 25,26 ', 24 " and 30; can improve the guiding accuracy of column type rolling friction guide rail, simple, quick and easy.Decide guide rail 22 and two slip rails 25,26 in cylindrical moving guide rail 11 and V-type and cooperate and move, with the bearing accuracy and repetitive positioning accuracy and the rectilinearity that are fixed on grating chi 36 and grating ruler reading head 35 Displacement Measurement drivers on the grating chi interface board 34 along directions X.Limit switch 37,38 is housed at the two ends of guide rail, and after cylindrical moving guide rail 11 motions put in place, limit switch 37 or 38 sent signal, and motor 1 stops operating.As required, X is housed to ring flange 27, can be used for the optical instrument focusing at the front end face of cylindrical moving guide rail 11.Y is housed to ring flange 28 in the upper surface of cylindrical moving guide rail 11, can be used as the translation work stage.
The rotating speed of motor 1 can be adjusted as required, by regulating the rotating speed of motor 1, finds satisfactory ratio of gear, so that the control device run duration, thereby improved unit efficiency; Handwheel 21 is equipped with in addition 1 axle upper end at motor 1, uses when being convenient to debug on the one hand or during outage.
Claims (5)
1. the gap that disappears accurate guiding gearshift, it is characterized in that comprising disappear interstitial structure and the cylindrical moving guide rail structure of V-arrangement, the interstitial structure that disappears comprises motor (1), motor cabinet (3), bearing bracket stand (5), shaft coupling (6), the gap plate that disappears (7), screw ring (9), screw mandrel (10), bearing briquetting (14), first thrust bearing (16) and second thrust bearing, (18); The cylindrical moving guide rail structure of V-arrangement comprise cylindrical moving guide rail (11), V-type decide guide rail (22) and two slip rails (25,26), bikini fixed mount (23), flush end holding screw (24,24 ', 24 "), steel ball (29,29 ', 29 "); The motor (1) that is fixed on the motor cabinet (3) is connected with screw mandrel (10) by shaft coupling (6); Bearing bracket stand (5) is fixed on the motor cabinet (3), and first thrust bearing (16) and second thrust bearing (18) are installed in the two ends of bearing bracket stand (5), and screw mandrel (10) is installed on first thrust bearing (16) and second thrust bearing (18) inner ring; Bearing briquetting (14) is fixed on the screw mandrel (10), adjusts bearing briquetting (14) screw mandrel (10) and the inner ring of first thrust bearing (16) and second thrust bearing (18) are closely cooperated; Screw ring (9) and the gap plate that disappears (7), and tighten up screw ring (9) and the gap plate that disappears (7) on screw mandrel (10) by threaded engagement; Screw ring (9) is fixed together with cylindrical moving guide rail (11); Uniform three V-shaped grooves (a, b, c) that have on the circumference of cylindrical moving guide rail (11), a following V-shaped groove (a) cooperates with the guide rail (22) of deciding of V-type, is placed with steel ball (29) between the two, adopts first retainer (31) with steel ball (29) separately; With above the cylindrical moving guide rail (11) two V-type grooves cooperate is two slip rails (25,26), at other two V-type groove (b, c) with two slip rails (25,26) be placed with between steel ball (29 ', 29 "); adopt two other retainer (32; 33) with steel ball (29 '; 29 ") are separately, V-type is decided guide rail (22) and two slip rails (25,26) be fixed on the bikini fixed mount (23), (24 ") are positioned on two slip rails (25; 26) flush end holding screw (24 '), adjust flush end holding screw (24); (30) eliminate cylindrical moving guide rail (11) and decide gap between the guide rail (22).
2. the gap accurate guiding gearshift that disappears according to claim 1, it is characterized in that: limit switch (37 is housed at described two ends of deciding guide rail (22), 38), when cylindrical moving guide rail (11) moves to the two ends extreme position, the limit switch at two ends (37,38) sends signal, motor (1) is stopped operating, improve bearing accuracy.
3. the gap accurate guiding gearshift that disappears according to claim 1, it is characterized in that: the front end face at described cylindrical moving guide rail (11) is equipped with X to ring flange (27), can be used as the focusing of optical instrument; Y is housed to ring flange (28) in the upper surface of described cylindrical moving guide rail (11), uses as work stage.
4. the gap that disappears according to claim 1 accurate guiding gearshift is characterized in that: be fixed with in described bearing bracket stand (5) upper end and be used for dustproof bearing cap (15).
5. the gap accurate guiding gearshift that disappears according to claim 1, it is characterized in that: the other end at described motor shaft is equipped with handwheel (21), is convenient to debugging on the one hand, can be used as an interface on the other hand, conveniently links to each other with angular encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110100605A CN102262905B (en) | 2011-04-21 | 2011-04-21 | Clearance eliminating precision guide displacement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110100605A CN102262905B (en) | 2011-04-21 | 2011-04-21 | Clearance eliminating precision guide displacement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102262905A true CN102262905A (en) | 2011-11-30 |
| CN102262905B CN102262905B (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110100605A Expired - Fee Related CN102262905B (en) | 2011-04-21 | 2011-04-21 | Clearance eliminating precision guide displacement device |
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| CN (1) | CN102262905B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540391A (en) * | 2011-12-23 | 2012-07-04 | 中国科学院长春光学精密机械与物理研究所 | Precision focusing mechanism taking linear motor and grating rulers as servo elements |
| CN102979870A (en) * | 2012-12-05 | 2013-03-20 | 中国科学院光电技术研究所 | Mechanism capable of transmitting rotating torque and axially reciprocating |
| CN104851468A (en) * | 2015-05-08 | 2015-08-19 | 广西科技大学 | Axial gap adjusting device |
| CN108405624A (en) * | 2018-05-08 | 2018-08-17 | 邢台纳科诺尔精轧科技股份有限公司 | A kind of battery pressure roller with bearing anti-backlash mechanism |
| CN109239884A (en) * | 2018-09-18 | 2019-01-18 | 昆明北方红外技术股份有限公司 | The positioning system and method for guide rail in variable-power optical system |
| CN112503148A (en) * | 2020-11-19 | 2021-03-16 | 中国科学院上海光学精密机械研究所 | Preload-adjustable precision guide screw rod displacement mechanism |
| CN113110286A (en) * | 2021-03-30 | 2021-07-13 | 中国科学院光电技术研究所 | Precision clearance control system and method based on pressure feedback |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336744B1 (en) * | 1999-03-11 | 2002-01-08 | Siemens Linear Motor Systems Gmbh & Co. Kg | Linear drive and process for assembly and dismantling of said linear drive |
| CN201042744Y (en) * | 2007-04-29 | 2008-04-02 | 王辉 | Interstice eliminated slide guide mechanism |
| CN201322877Y (en) * | 2008-11-21 | 2009-10-07 | 广东工业大学 | Performance testing device of precise servo linear drive system |
-
2011
- 2011-04-21 CN CN201110100605A patent/CN102262905B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336744B1 (en) * | 1999-03-11 | 2002-01-08 | Siemens Linear Motor Systems Gmbh & Co. Kg | Linear drive and process for assembly and dismantling of said linear drive |
| CN201042744Y (en) * | 2007-04-29 | 2008-04-02 | 王辉 | Interstice eliminated slide guide mechanism |
| CN201322877Y (en) * | 2008-11-21 | 2009-10-07 | 广东工业大学 | Performance testing device of precise servo linear drive system |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540391A (en) * | 2011-12-23 | 2012-07-04 | 中国科学院长春光学精密机械与物理研究所 | Precision focusing mechanism taking linear motor and grating rulers as servo elements |
| CN102979870A (en) * | 2012-12-05 | 2013-03-20 | 中国科学院光电技术研究所 | Mechanism capable of transmitting rotating torque and axially reciprocating |
| CN102979870B (en) * | 2012-12-05 | 2015-06-17 | 中国科学院光电技术研究所 | Mechanism capable of transmitting rotating torque and axially reciprocating |
| CN104851468A (en) * | 2015-05-08 | 2015-08-19 | 广西科技大学 | Axial gap adjusting device |
| CN104851468B (en) * | 2015-05-08 | 2017-06-16 | 广西科技大学 | Axial interval regulator |
| CN108405624A (en) * | 2018-05-08 | 2018-08-17 | 邢台纳科诺尔精轧科技股份有限公司 | A kind of battery pressure roller with bearing anti-backlash mechanism |
| CN108405624B (en) * | 2018-05-08 | 2023-12-19 | 邢台纳科诺尔精轧科技股份有限公司 | Battery compression roller with bearing clearance eliminating mechanism |
| CN109239884A (en) * | 2018-09-18 | 2019-01-18 | 昆明北方红外技术股份有限公司 | The positioning system and method for guide rail in variable-power optical system |
| CN109239884B (en) * | 2018-09-18 | 2021-05-04 | 昆明北方红外技术股份有限公司 | Positioning system and method for guide rail in zoom optical system |
| CN112503148A (en) * | 2020-11-19 | 2021-03-16 | 中国科学院上海光学精密机械研究所 | Preload-adjustable precision guide screw rod displacement mechanism |
| CN113110286A (en) * | 2021-03-30 | 2021-07-13 | 中国科学院光电技术研究所 | Precision clearance control system and method based on pressure feedback |
| CN113110286B (en) * | 2021-03-30 | 2022-12-30 | 中国科学院光电技术研究所 | Precision clearance control system and method based on pressure feedback |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102262905B (en) | 2012-09-19 |
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