CN102873558B - Turbine blade clamp based on piezoelectric ceramics and quick posture adjusting method - Google Patents

Turbine blade clamp based on piezoelectric ceramics and quick posture adjusting method Download PDF

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CN102873558B
CN102873558B CN201210355478.7A CN201210355478A CN102873558B CN 102873558 B CN102873558 B CN 102873558B CN 201210355478 A CN201210355478 A CN 201210355478A CN 102873558 B CN102873558 B CN 102873558B
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blade
shop bolt
piezoelectric ceramics
turbine blade
eddy current
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CN201210355478.7A
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CN102873558A (en
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王恪典
刘志会
郭华
梅雪松
杨鹏云
解晓龙
邹创
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Xian Jiaotong University
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Xian Jiaotong University
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Abstract

The invention discloses a turbine blade clamp based on piezoelectric ceramics and a quick posture adjusting method. The method comprises the following steps: positioning the blade curve of a turbine blade by the clamp via six pins; using a screw rod to clamp the two end planes of the blade, so that the bottom part of the dowel pins are matched with a displacement output rod of the piezoelectric ceramics. The quick posture adjusting method takes the advantage of the characteristic that the length of the displacement output rod of the piezoelectric ceramics changes with the change of the voltage to adjust the voltage of the piezoelectric ceramics according to the posture change data of a blade tenon collected by an eddy current displacement sensor in X, Y and Z directions after the blade is clamped, so as to adjust the blade posture. According to the method, the flexibility of the turbine blade clamp and the positioning precision of the blade are improved, the blade assembling time is saved, the production cost is lowered and the economic benefit is improved.

Description

A kind of turbine blade fixture and pose quickly regulating method based on piezoelectric ceramics
Technical field
The present invention relates to the fixture field of turbine blade, particularly a kind of turbine blade fixture and pose quickly regulating method based on piezoelectric ceramics.
Background technology
Turbine is the rotating type impeller motive power machine device that a kind of heat energy by gas or liquid fuel combustion generation is converted into mechanical power, being widely used in the fields such as the energy, aviation, traffic, national defence, is the crucial Grand Equipments that adapts to China's Energy restructuring and Aviation Industry.Turbine Blades With temperature is the most complicated in gas turbine temperature the highest (more than 1400 DEG C), stress, the worst position of environment, and its value accounts for the nearly 50% of complete machine, is the critical component in gas turbine.The machining accuracy of blade just becomes affects one of leaf longevity and performance key factor.Due to blade curved surface more complicated, how to ensure the accurate location in blade mechanism processing and rationally clamp the key that also just becomes service life of guaranteeing blade under the adverse circumstances such as high temperature, High Rotation Speed.
At present, in the processing of blade tenon, manufacturer generally all adopts low-melting alloy to contain box method.Chinese patent document CN101417396A discloses a kind of New Complex curved surface positioning and clamping fast algorithm of the sealing of the shape based on differential geometric clamp precision theory, anchor point criterion.The shortcoming of the invention of setting forth in this file is that shop bolt length is fixing non-adjustable, turbine blade pose after clamping cannot be changed, in clamping process, the pose of blade key area is not changed and carries out Real-Time Monitoring, once after the shop bolt designing in grip device machines, whole fixture adjustability pose poor, that reuse inefficiency, screw rod rotation clamping rear blade is non-adjustable.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of turbine blade fixture and pose quickly regulating method based on piezoelectric ceramics, the fast and accurate adjusting that can show blade pose clamps the required precision of pose to reach processing front vane.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of turbine blade fixture based on piezoelectric ceramics, comprise blade locking device, blade clamping device and blade tenon pose signal monitoring device, blade locking device, blade clamping device and blade tenon pose signal monitoring device are all fixed in base platform 4;
Described blade clamping device comprises the first clamping seats 8 and the second clamping seats 14, the first clamping seats 8 and the second clamping seats 14 are fixed on the long axis of base platform 4, on the first clamping seats 8, be furnished with the first screw rod 9 of vertical direction, for loading the afterbody that clamps turbine blade 5, the second clamping seats 14 is provided with installs pilot hole 2, and be furnished with the 4th screw rod 1, the 5th screw rod 13 of the second screw rod 11, the 3rd screw rod 12 and the horizontal direction of vertical direction, for loading the head that clamps turbine blade 5;
Described blade locking device comprises the first shop bolt 3, the second shop bolt 6, the 3rd shop bolt 7, the 4th shop bolt 10, the 5th shop bolt 16, the 6th shop bolt 17, also comprise the first pin holder 15, the second pin holder 18, wherein the first shop bolt 3, the second shop bolt 6, the 3rd shop bolt 7, the 6th shop bolt 17 is vertically fixed on said base platform 4, the first shop bolt 3 centers on the second clamping seats 14 right sides become 30 ° angles with the second screw rod 11 centers with the 3rd screw rod 12 lines of centres with the 6th shop bolt 17 lines of centres, the second shop bolt 6 centers in the left side of the first clamping seats 8 become 30 ° of angles with the 3rd shop bolt 7 lines of centres with the long axis of base platform 4, the 4th shop bolt 10, the 5th shop bolt 16 respectively level is arranged on the second pin holder 18 and the first pin holder 15, the first pin holder 15 long axis both sides of being fixed on base platform 4 parallel with the second pin holder 18,
Described blade tenon pose signal monitoring device comprises the first flange seat 20, the second flange seat 19, the first eddy current displacement sensor 21, the second eddy current displacement sensor 22, the 3rd eddy current displacement sensor 23, the 4th eddy current displacement sensor 24, the 5th eddy current displacement sensor 25, the 6th eddy current displacement sensor 26, the first flange seat 20 and the second flange seat 19 are fixed in base platform 4, the tenon end face of the centre-to-centre spacing turbine blade 5 of the first flange seat 20 and its long axis direction parallel with the second clamping seats 14 is no more than 10mm, the second flange seat 19 is no more than 20mm in tenon tooth end face outside the spacing of turbine blade 5, the 3rd eddy current displacement sensor 23 and the 6th eddy current displacement sensor 26 symmetries are fixed on the positive directions X of the first flange seat 20, the first eddy current displacement sensor 21 and the second eddy current displacement sensor 22 are fixed in the Z direction of the first flange seat 20, the 5th eddy current displacement sensor 25 and the 4th eddy current displacement sensor 24 are fixed in the Y-direction of the second flange seat 19.
The bottom of described shop bolt is provided with shrinkage pool A, shrinkage pool A matches with the displacement take-off lever of piezoelectric ceramics C head, all piezoelectric ceramics C are all mounted in pin holder or base platform B inside, installing hole is all that through hole accesses with the power line that facilitates piezoelectric ceramics, and all through holes are all designed with positive stop lug boss to fix the position of piezoelectric ceramics C.
A pose quickly regulating method for turbine blade fixture based on piezoelectric ceramics, comprises the following steps
The first step, utilizes LABVIEW design virtual instrument to record turbine blade that eddy current displacement sensor collects 5 tenon pose original state amount W in tenon pose monitoring device a=(W a1, W a2, W a3, W a4, W a5, W a6), after turbine blade 5 is clamped, record the stable state amount W of its tenon pose b=(W b1, W b2, W b3, W b4, W b5, W b6), calculate position and posture variation delta W=W a-W b;
Second step, supposes that the pose of turbine blade 5 after clamping need regulate the displacement of shop bolt will reach positioning accuracy request time be L=(L 1, L 2, L 3, L 4, L 5, L 6), employing neural network algorithm sets up blade tenon pose variable quantity and shop bolt theoretical bits is moved the functional relation L=f(Δ W between regulated quantity);
The 3rd step, the voltage-regulation value of establishing piezoelectric ceramics C is U=(U 1, U 2, U 3, U 4, U 5, U 6), according to voltage-displacement parameter data of piezoelectric ceramics C, set up blade tenon pose variable quantity W, shop bolt theoretical bits is moved the functional relation U=f (L, W) between regulated quantity L and piezoelectric ceramics voltage-regulation amount U three, and deposit in computer;
The 4th step, in the time that each turbine blade 5 is processed clamping, directly call according to the tenon pose delta data of the turbine blade 5 collecting the magnitude of voltage U that obtains the piezoelectric ceramics C that regulate in Computer Database, and corresponding piezoelectric ceramics voltage that C connects is regulated.
The present invention has the following advantages and beneficial effect
1) adopt shop bolt to position the blade curved surface of turbine blade, with respect to traditional low-melting alloy box containment method, technological process is simpler, consume energy still less, and low cost of manufacture, noxious gas emission significantly reduces.
2) in to turbine blade location clamping process, blade key area (tenon) is carried out to Real-Time Monitoring and the collection of pose delta data, the actual condition of each blade is carried out to detailed data record, can form blade processing database abundant, that have actual analysis to be worth.
3) apparatus structure that adopts piezoelectric ceramics to match with shop bolt, can effectively control, change the relative position of pin and blade, can after clamping, blade can adjust fully, fast, accurately the pose of blade, to meet the clamping accuracy requirement of blade before processing, the rate of reducing the number of rejects and seconds.
4) the present invention has shortened the process time of turbine blade on the whole, has improved working (machining) efficiency, has strengthened reusability and the flexibility of fixture, has saved processing cost simultaneously and improved economic benefit on fixture uses.
Brief description of the drawings:
Fig. 1 is integral installation figure of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the normal axomometric drawing of turbine blade tenon pose signal monitoring device of the present invention.
Fig. 4 is that shop bolt coordinates schematic diagram with the installation of piezoelectric ceramics.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is elaborated.
With reference to Fig. 1 and Fig. 2, a kind of turbine blade fixture based on piezoelectric ceramics, comprise blade locking device, blade clamping device and blade tenon pose signal monitoring device, blade locking device, blade clamping device and blade tenon pose signal monitoring device are all fixed in base platform 4;
Described blade clamping device comprises the first clamping seats 8 and the second clamping seats 14, the first clamping seats 8 and the second clamping seats 14 are fixed on by soket head cap screw on the long axis of base platform 4, on the first clamping seats 8, be furnished with the first screw rod 9 of vertical direction for loading the afterbody that clamps turbine blade 5, the second clamping seats 14 is provided with installs pilot hole 2, and the 4th screw rod 1, the 5th screw rod 13 that are furnished with the second screw rod 11, the 3rd screw rod 12 and the horizontal direction of vertical direction are for loading the head that clamps turbine blade 5;
Described blade locking device comprises the first shop bolt 3, the second shop bolt 6, the 3rd shop bolt 7, the 4th shop bolt 10, the 5th shop bolt 16, the 6th shop bolt 17, also comprises the first pin holder 15, the second pin holder 18, wherein the first shop bolt 3, the second shop bolt 6, the 3rd shop bolt 7, the 6th shop bolt 17 is vertically fixed on said base platform 4, the first shop bolt 3 centers on the second clamping seats 14 right sides become 30 ° angles with the second screw rod 11 centers with the 3rd screw rod 12 lines of centres with the 6th shop bolt 17 lines of centres, the second shop bolt 6 centers in the left side of the first clamping seats 8 become 30 ° of angles, the 4th shop bolt 10 with the 3rd shop bolt 7 lines of centres with the long axis of base platform 4, the 5th shop bolt 16 respectively level is arranged on the second pin holder 18 and the first pin holder 15, the first pin holder 15 with the second pin holder 18 by the parallel long axis both sides that are fixed on base platform 4 of soket head cap screw,
With reference to Fig. 3, described turbine blade tenon pose signal monitoring device comprises the first flange seat 20, the second flange seat 19, the first eddy current displacement sensor 21, the second eddy current displacement sensor 22, the 3rd eddy current displacement sensor 23, the 4th eddy current displacement sensor 24, the 5th eddy current displacement sensor 25, the 6th eddy current displacement sensor 26, the first flange seat 20 and the second flange seat 19 are fixed in base platform 4 by soket head cap screw, the tenon end face of the centre-to-centre spacing turbine blade 5 of the first flange seat 20 and its long axis direction parallel with the second clamping seats 14 is no more than 10mm, the second flange seat 19 is no more than 20mm in tenon tooth end face outside the spacing of turbine blade 5, the 3rd eddy current displacement sensor 23 and the 6th eddy current displacement sensor 26 symmetries are fixed on the positive directions X of the first flange seat 20, these two sensor probe centers are from the upper surface 43mm of base platform 4, with the pose delta data of effective Real-Time Monitoring blade tenon directions X in clamping process, the first eddy current displacement sensor 21 and the second eddy current displacement sensor 22 are fixed in the positive Z direction of the first flange seat 20,2 sensor probe centers on these two sensor probe centers and above-mentioned directions X are completely in a plane, for monitoring the pose delta data of blade tenon in clamping process Z direction, the 4th eddy current displacement sensor 24 and five eddy current displacement sensors 25 are fixed in the positive Y-direction of flange seat 19, these two sensor probe centers are from the upper surface 43mm of base platform 4, from blade tenon increment face 1.5-3mm, for monitoring the pose delta data of blade tenon in clamping process Y-direction.
With reference to Fig. 4, the bottom of described shop bolt is provided with shrinkage pool A, shrinkage pool A matches with the displacement take-off lever of piezoelectric ceramics C head, all piezoelectric ceramics C are all mounted in pin holder or base platform B inside, installing hole is all that through hole accesses with the power line that facilitates piezoelectric ceramics C, and all through holes are all designed with positive stop lug boss to fix the position of piezoelectric ceramics C.
A pose quickly regulating method for turbine blade fixture based on piezoelectric ceramics, comprises the following steps
The first step: utilize LABVIEW design virtual instrument to record turbine blade that eddy current displacement sensor collects 5 tenon pose original state amount W in tenon pose monitoring device a=(W a1, W a2, W a3, W a4, W a5, W a6), after turbine blade 5 is clamped, record the stable state amount Wb=(W of its tenon pose b1, W b2, W b3, W b4, W b5, W b6), calculate position and posture variation delta W=W a-W b;
Second step: it is L=(L that the pose of supposition turbine blade 5 after clamping need regulate the displacement of shop bolt will reach positioning accuracy request time 1, L 2, L 3, L 4, L 5, L 6), employing neural network algorithm sets up blade tenon pose variable quantity and shop bolt theoretical bits is moved the functional relation L=f(Δ W between regulated quantity);
The 3rd step: the voltage-regulation value of establishing piezoelectric ceramics C is U=(U 1, U 2, U 3, U 4, U 5, U 6), according to voltage-displacement parameter data of piezoelectric ceramics C, set up blade tenon pose variable quantity W, shop bolt theoretical bits is moved the functional relation U=f (L, W) between regulated quantity L and piezoelectric ceramics voltage-regulation amount U three, and deposit in computer;
The 4th step: in the time that each turbine blade 5 is processed clamping, directly call according to the tenon pose delta data of the turbine blade 5 collecting the magnitude of voltage U that obtains the piezoelectric ceramics C that regulate in Computer Database, and corresponding piezoelectric ceramics voltage that C connects is regulated.

Claims (3)

1. the turbine blade fixture based on piezoelectric ceramics, comprise blade locking device, blade clamping device and blade tenon pose signal monitoring device, it is characterized in that: blade locking device, blade clamping device and blade tenon pose signal monitoring device are all fixed in base platform (4);
Described blade clamping device comprises the first clamping seats (8) and the second clamping seats (14), the first clamping seats (8) is fixed on the long axis of base platform (4) with the second clamping seats (14), on the first clamping seats (8), be furnished with first screw rod (9) of vertical direction for loading the afterbody that clamps turbine blade (5), the second clamping seats (14) is provided with installs pilot hole (2), and be furnished with second screw rod (11) of vertical direction, the 4th screw rod (1) of the 3rd screw rod (12) and horizontal direction, the 5th screw rod (13) is for loading the head that clamps turbine blade (5),
Described blade locking device comprises the first shop bolt (3), the second shop bolt (6), the 3rd shop bolt (7), the 4th shop bolt (10), the 5th shop bolt (16), the 6th shop bolt (17), also comprise the first pin holder (15), the second pin holder (18), wherein the first shop bolt (3), the second shop bolt (6), the 3rd shop bolt (7), the 6th shop bolt (17) is vertically fixed on said base platform (4), the first shop bolt (3) center on the second clamping seats (14) right side becomes 30 ° angles with the second screw rod (11) center with the 3rd screw rod (12) line of centres with the 6th shop bolt (17) line of centres, the second shop bolt (6) center in the left side of the first clamping seats (8) becomes 30 ° of angles with the 3rd shop bolt (7) line of centres with the long axis of base platform (4), the 4th shop bolt (10), the 5th shop bolt (16) respectively level is arranged on the second pin holder (18) and the first pin holder (15), the first pin holder (15) and the second parallel long axis both sides that are fixed on base platform (4) of pin holder (18),
Described blade tenon pose signal monitoring device comprises the first flange seat (20), the second flange seat (19), the first eddy current displacement sensor (21), the second eddy current displacement sensor (22), the 3rd eddy current displacement sensor (23), the 4th eddy current displacement sensor (24), the 5th eddy current displacement sensor (25), the 6th eddy current displacement sensor (26), the first flange seat (20) is fixed in base platform (4) with the second flange seat (19), the tenon end face of the centre-to-centre spacing turbine blade (5) of the first flange seat (20) and its long axis direction parallel with the second clamping seats (14) is no more than 10mm, the second flange seat (19) is no more than 20mm in tenon tooth end face outside the spacing of turbine blade (5), the 3rd eddy current displacement sensor (23) is fixed on the positive directions X of the first flange seat (20) with the 6th eddy current displacement sensor (26) symmetry, the first eddy current displacement sensor (21) is fixed in the Z direction of the first flange seat (20) with the second eddy current displacement sensor (22), the 5th eddy current displacement sensor (25) is fixed in the Y-direction of the second flange seat (19) with the 4th eddy current displacement sensor (24).
2. a kind of turbine blade fixture based on piezoelectric ceramics according to claim 1, it is characterized in that: described the first shop bolt (3), the second shop bolt (6), the 3rd shop bolt (7), the 4th shop bolt (10), the 5th shop bolt (16), the bottom of the 6th shop bolt (17) is provided with shrinkage pool (A), shrinkage pool (A) matches with the displacement take-off lever of piezoelectric ceramics (C) head, all piezoelectric ceramics (C) are all mounted in pin holder or base platform (4) inside, installing hole is all that through hole is to facilitate the power line access of piezoelectric ceramics, and all through holes are all designed with positive stop lug boss to fix the position of piezoelectric ceramics (C).
3. a kind of turbine blade fixture based on piezoelectric ceramics according to claim 1, is characterized in that, pose quickly regulating method comprises the following steps:
The first step, utilizes LABVIEW design virtual instrument to record turbine blade that eddy current displacement sensor collects in tenon pose monitoring device (5) tenon pose original state amount W a=(W a1, W a2, W a3, W a4, W a5, W a6), after turbine blade (5) is clamped, record the stable state amount W of its tenon pose b=(W b1, W b2, W b3, W b4, W b5, W b6), calculate blade tenon pose variable quantity △ W=W a-W b;
Second step, supposes that it is L=(L that the pose of turbine blade (5) after clamping need regulate the displacement of shop bolt will reach positioning accuracy request time 1, L 2, L 3, L 4, L 5, L 6), employing neural network algorithm sets up blade tenon pose variable quantity and shop bolt theoretical bits is moved the functional relation L=f (△ W) between regulated quantity;
The 3rd step, the voltage-regulation value of establishing piezoelectric ceramics (C) is U=(U 1, U 2, U 3, U 4, U 5, U 6), according to voltage-displacement parameter data of piezoelectric ceramics (C), set up blade tenon pose variable quantity △ W, shop bolt theoretical bits is moved the functional relation U=f (L, △ W) between regulated quantity L and piezoelectric ceramics voltage-regulation value U three, and deposit in computer;
The 4th step, in the time that each turbine blade (5) is processed clamping, directly call in the voltage-regulation value U that obtains the piezoelectric ceramics (C) that regulate in Computer Database according to the tenon pose delta data of the turbine blade collecting (5), and corresponding piezoelectric ceramics (C) voltage that connects is regulated.
CN201210355478.7A 2012-09-21 2012-09-21 Turbine blade clamp based on piezoelectric ceramics and quick posture adjusting method Expired - Fee Related CN102873558B (en)

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