CN109341510B - Air gap measuring device of wind driven generator - Google Patents
Air gap measuring device of wind driven generator Download PDFInfo
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- CN109341510B CN109341510B CN201811288924.0A CN201811288924A CN109341510B CN 109341510 B CN109341510 B CN 109341510B CN 201811288924 A CN201811288924 A CN 201811288924A CN 109341510 B CN109341510 B CN 109341510B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
Abstract
The invention discloses an air gap measuring device of a wind driven generator, which comprises a protective cylinder, wherein a rotor is arranged in a stator, a radial air gap is formed between the inner wall of the stator and the outer wall of the rotor, and an axial air gap is formed between the inner end surface of the stator and the end surface of the rotor; the stator is provided with a detection chute, the detection chute and the detection slide block are assembled in a sliding mode, and the sliding direction is the axial direction of the stator; a radial eddy current sensor is arranged in the detection sliding block, and a plurality of first induction strips are arranged on the circumference of the rotor; two ends of the stator are respectively assembled and fixed with one end of the first rotating shaft and one end of the second rotating shaft, and the other ends of the first rotating shaft and the second rotating shaft respectively penetrate through the first partition disc and the fourth partition disc and then extend out of the protective cylinder; one end of the detection slide block, which is far away from the rotor, is arranged in the detection slide hole, the detection slide hole is arranged on the slide ring and extends into the power block, at least two power blocks are arranged, every two power blocks are fixedly connected through a connecting arc plate, so that a slide ring is formed, and the inner side of the slide ring is attached to the outer wall of the stator; the power block is provided with a power screw hole.
Description
Technical Field
The invention relates to a measurement technology, in particular to a wind driven generator air gap measurement device.
Background
The method for measuring the air gap of the wind driven generator by adopting the eddy current sensor is disclosed in the Chinese invention patent application with the publication number of CN104154853A, the air gap between the stator and the rotor of the wind driven generator is detected by arranging the radial eddy current sensor and the axial eddy current sensor and matching with a detection analysis technology, so that the air gap measurement precision of the wind driven generator is improved, the control precision of the air gap between the stator and the rotor is also improved, data can be acquired, and reverse verification is carried out on the design through a large amount of data.
However, this design can only measure a certain air gap between the stator and the rotor, and cannot acquire data within a certain range in the axial direction. However, in practice, the coaxiality between the stator and the rotor cannot reach 100%, which means that the stator and the rotor have a variation in the circumferential (diametrical) pitch and the pitch varies at different positions in the axial direction. It is generally impossible to determine the axial deviation of the stator and rotor by measuring the air gap at a single location. Although the coaxiality of the stator and the rotor can be judged by respectively measuring the air gaps at the two ends of the stator and the rotor, the mutual approaching surfaces of the stator and the rotor cannot be completely standard in the manufacturing process, so that the air gap at a certain position on the axial direction cannot be accurately obtained even if the coaxial deviation is known, which is necessary to be known in the previous design and experimental verification, otherwise, the performance of the whole machine can be directly influenced by sudden change of the air gap at a certain position.
Of course, numerous sets of air gap measuring arrangements can be provided axially with the rotor and stator, but it is clear that this approach is very costly, complicated and otherwise has a significant impact on the stator or rotor, which is not to be compensated for.
Disclosure of Invention
In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a wind turbine air gap measuring device, which has a simple structure and a low cost, and can realize multi-point measurement of the air gap in the axial direction of the stator and the rotor.
In order to achieve the purpose, the invention provides an air gap measuring device of a wind driven generator, which comprises a protection cylinder, wherein two ends of the protection cylinder are opened, and a first separation disc, a second separation plate, a third separation disc and a fourth separation disc are sequentially arranged in the protection cylinder from one end opening to the other end opening;
the second partition plate and the third partition plate are fixed on the outer wall of the stator, the rotor is installed in the stator, a radial air gap is formed between the inner wall of the stator and the outer wall of the rotor, and an axial air gap is formed between the inner end face of the stator and the end face of the rotor;
the stator is provided with at least two detection sliding grooves penetrating through the side wall of the stator, the detection sliding grooves and the detection sliding blocks can be assembled in a sliding mode, and the sliding direction is the axial direction of the stator;
a radial eddy current sensor is arranged in the detection sliding block, and a plurality of first induction strips are arranged on the circumference of the rotor;
two ends of the stator are respectively assembled and fixed with one end of the first rotating shaft and one end of the second rotating shaft, and the other ends of the first rotating shaft and the second rotating shaft respectively penetrate through the first partition disc and the fourth partition disc and then extend out of the protective cylinder;
one end of the detection slide block, which is far away from the rotor, is arranged in a detection slide hole, the detection slide hole is arranged on the slide ring and extends into the power block, at least two power blocks are arranged, every two power blocks are fixedly connected through a connecting arc plate, so that a slide ring is formed, and the inner side of the slide ring is attached to the outer wall of the stator;
preferably, the first induction strip is internally provided with a magnet, and when the first induction strip is close to the radial eddy current sensor, the first induction strip can generate electric signals with different strengths according to the intensity of the magnetic field, so that the distance between the first induction strip and the radial eddy current sensor can be judged.
Preferably, a second induction strip is further arranged on the end face of the rotor assembled with the first rotor, and a key phase sensor and an axial eddy current sensor are respectively arranged on the end faces of the inner sides of the stator and the rotor, which are opposite to the end faces of the second induction strip.
Preferably, different power screw holes are respectively assembled with the first screw rod, the second screw rod, the third screw rod and the fourth screw rod in a screwing mode through threads, one end of each of the first screw rod, the second screw rod, the third screw rod and the fourth screw rod is rotatably assembled with the fourth partition disc, the other end of each of the first screw rod, the second screw rod, the third screw rod and the fourth screw rod penetrates through the first partition disc and is then respectively assembled and fixed with the first belt wheel, the second belt wheel, the third belt wheel and the fourth belt wheel, and the first screw rod penetrates through the first partition disc and is then assembled and fixed with an output shaft of the motor;
the first belt wheel, the second belt wheel, the third belt wheel and the fourth belt wheel are connected through a belt to form a belt transmission structure, the belt is tightly pressed through a tensioning wheel, the tensioning wheel is installed on a tensioning shaft, two ends of the tensioning shaft are rotatably assembled with the first partition plate and the second partition plate respectively, the tensioning shaft is hollow, and the general wiring penetrates through the interior of the tensioning shaft and then bypasses the guide wheel and then is wound on the winding drum.
Preferably, the first belt wheel, the second belt wheel, the third belt wheel, the fourth belt wheel and the tensioning wheel are synchronous belt wheels, and the belt is a synchronous belt with synchronous clamping teeth arranged on the inner side and the outer side.
Preferably, the guide wheel is rotatably assembled with the guide shaft, two ends of the guide shaft are respectively assembled and fixed with the third shaft plate and the fourth shaft plate, and the third shaft plate and the fourth shaft plate are respectively fixed on the second partition plate;
the winding reel is assembled with the winding shaft in a screwing mode through threads, one end of the winding shaft is rotatably assembled with the second shaft plate, the other end of the winding shaft penetrates through the first shaft plate and then is assembled and fixed with the second bevel gear, and the winding shaft is rotatably assembled with the first shaft plate; two ends of the winding reel are respectively assembled and fixed with a shaft ring of a thrust ball bearing, a seat ring of the thrust ball bearing is respectively attached to one end of a resistance spring, the other end of the resistance spring is respectively attached to a first shaft plate and a second shaft plate, and the resistance springs are respectively sleeved on the winding reel;
the second bevel gear is in meshing transmission with the first bevel gear, and the first bevel gear is installed at the end part of the second screw rod.
Preferably, the device also comprises a positioning assembly, wherein the positioning assembly comprises a positioning plate, the positioning plate is fixed on the inner side of the protective barrel, and is respectively provided with a positioning chute, an induction chute, a positioning slide hole and a positioning reset hole; the bottom of the positioning slide block is provided with an induction slide block, and the induction slide block is arranged in the induction slide groove and can slide in the induction slide groove and in the axial direction of the rotor;
a positioning slide rod is arranged in the positioning slide hole, one end of the positioning slide rod is provided with a ball, the other end of the positioning slide rod is fixed with an elastic sleeve, one end of the elastic sleeve is arranged in the positioning reset hole, the open end of the elastic sleeve and the interior of the triggering guide cylinder can be assembled in an axially movable mode, the bottom of the triggering guide cylinder and the triggering rod can be assembled in an axially movable mode, and the bottom of the triggering rod and the triggering button are assembled and fixed;
the trigger button is arranged on the induction plate, and the induction plate is fixed on the positioning plate.
Preferably, the number of the trigger buttons is multiple, and each trigger button is distributed on the induction plate at intervals and is positioned below the induction chute;
the trigger guide cylinder is fixed on the induction plate, and the top of the trigger guide cylinder is arranged in the positioning reset hole;
in the initial state, the top of the ball is higher than the bottom surface of the induction sliding groove, a trigger gap is formed between the positioning sliding rod and the trigger rod, and the trigger button waits for signal input at the moment.
Preferably, the induction slide block is provided with guide inclined planes at two axial sides of the rotor respectively, and the ball can make spherical rotation in the positioning slide rod.
Preferably, guide notches are respectively arranged near the inner side and the outer side of the detection sliding chute, the guide notches are respectively assembled with the guide lugs in a sliding manner, and the guide lugs are respectively arranged on the outer side of the detection sliding block; the detection slide block is arranged in the detection slide hole, a jacking spring is arranged between the top surface of the detection slide block and the top surface of the inner side of the detection slide hole, and the jacking spring jacks the detection slide block on the stator.
The invention has the beneficial effects that:
1. the invention can carry out multi-point detection on the first air gap in the axial direction of the rotor and the stator so as to judge the multi-point first air gap, provide state monitoring and parameter acquisition for verification and machine operation in the experiment and provide reference data for later-stage overhaul, maintenance and design.
2. The invention realizes the multi-point and accurate positioning of the radial eddy current sensor through the positioning assembly, thereby positioning the position of the first air gap of the sampling point and improving the detection precision and the parameter acquisition capability.
3. The invention collects and releases the general connection wire through the winding reel, on one hand, the general connection wire is prevented from being pulled to be damaged by larger pulling force, and on the other hand, the general connection wire is prevented from being hooked and wound with other structures.
Drawings
FIG. 1 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
FIG. 2 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
FIG. 3 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
FIG. 4 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
FIG. 5 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
FIG. 6 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
FIG. 7 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
FIG. 8 is a schematic structural diagram of an air gap measuring device of a wind turbine according to the present invention.
Fig. 9 is an enlarged view at F1 in fig. 8.
FIG. 10 is a schematic structural diagram of a slip ring of an air gap measuring device of a wind turbine according to the present invention.
FIG. 11 is a schematic structural diagram of a wind turbine generator air gap measuring device at a stator and a rotor.
FIG. 12 is a schematic structural diagram of a positioning assembly of an air gap measuring device of a wind turbine according to the present invention.
FIG. 13 is a schematic structural diagram of a positioning assembly of an air gap measuring device of a wind turbine according to the present invention.
FIG. 14 is a schematic diagram of an elastic sleeve structure of an air gap measuring device of a wind turbine generator according to the present invention.
FIG. 15 is a schematic view of a radial eddy current sensor mounting structure of an air gap measuring device of a wind turbine generator according to the present invention.
Detailed Description
The technical scheme of the patent is further described in detail by combining the following specific embodiments:
referring to fig. 1 to 15, an air gap measuring device for a wind turbine generator includes a protection cylinder 110, a first separation disc 210, a second separation disc 220, a third separation disc 230, and a fourth separation disc 240 are sequentially installed in the protection cylinder 110 with openings at two ends from one opening to the other opening, and the openings at two ends of the protection cylinder 110 are respectively sealed by the first separation disc 210 and the fourth separation disc 240;
the second partition plate 220 and the third partition plate 230 are fixed on the outer wall of the stator 120, the rotor 140 is installed inside the stator 120, a radial air gap 101 is formed between the inner wall of the stator 120 and the outer wall of the rotor 140, and an axial air gap 102 is formed between the inner end surface of the stator 120 and the end surface of the rotor 140;
the stator 120 is provided with at least two detection sliding grooves 121 penetrating through the side wall of the stator, the detection sliding grooves 121 and the detection sliding blocks 560 are assembled in a sliding mode, and the sliding direction is the axial direction of the stator;
detect slider 560 in install radial eddy current sensor 621, rotor 140 upwards be provided with the first response strip 141 of several in the circumference, first response strip 141 in install magnet, when first response strip 141 is close to radial eddy current sensor 621, it can produce the signal of telecommunication of different intensity according to magnetic field intensity to can judge the distance of individual first response strip 141 apart from radial eddy current sensor 621, just can infer the air gap through this distance.
Two ends of the stator 140 are respectively assembled and fixed with one end of a first rotating shaft 310 and one end of a second rotating shaft 320, the other ends of the first rotating shaft 310 and the second rotating shaft 320 respectively penetrate through a first partition plate 210 and a fourth partition plate 240 and then extend out of the protective cylinder 110, when the wind driven generator is actually used, the first rotating shaft 310 is connected with an input shaft of a gearbox, so that power is input into the gearbox and is input into the generator after being accelerated by the gearbox, the second rotating shaft is assembled with a rotating shaft of a fan blade, and the fan blade of the wind driven generator drives the rotor to rotate;
the end face of the rotor assembled with the first rotating shaft 310 is further provided with a second induction bar 142, the end faces of the stator 120 and the rotor at the inner sides opposite to the end face of the second induction bar 142 are respectively provided with a key phase sensor 611 and an axial eddy current sensor 612, and a magnet is arranged in the second induction bar 142. When the rotor rotates, the key phase sensor 611 detects the rotational speed of the rotor, and the axial eddy current sensor detects the axial distance between the end surface of the inner side of the stator 120 and the end surface of the rotor 140 assembled with the first rotating shaft 310, thereby determining whether the stator has moved axially.
One end of the detection slide block 560, which is far away from the rotor 140, is installed in the detection slide hole 521, the detection slide hole 521 is arranged on the slide ring 500 and extends into the power blocks 510, at least two power blocks 510 are arranged, every two power blocks 510 are fixedly connected through the connecting arc plates 520, so that the slide ring 500 is formed, and the inner side of the slide ring 500 is attached to the outer wall of the stator;
the power block 510 is provided with a power screw hole 512, at least one power block 510 is respectively provided with induction grooves 511 at two axial sides, in addition, the power block 510 is also provided with an electric connection groove 513, two adjacent electric connection grooves 513 are connected through an electric connection plate 530, a lead wire, a data wire and the like of the radial eddy current sensor 621 are connected into a circuit of the electric connection groove 513 and are in conductive connection or communication connection with external equipment through a general connection wire 540, so that a signal collected by the radial eddy current sensor is transmitted to the external equipment for processing and analysis;
different power screw holes 512 (four power blocks 510 at this time) are respectively assembled with the first screw 331, the second screw 332, the third screw 333 and the fourth screw 334 in a screwing manner through threads, one end of each of the first screw 331, the second screw 332, the third screw 333 and the fourth screw 334 is rotatably assembled with the fourth separation disc 240, the other end of each of the first screw 331, the second screw 332, the third screw 333 and the fourth screw 334 penetrates through the first separation disc 210 and is then respectively assembled and fixed with the first belt pulley 421, the second belt pulley 422, the third belt pulley 423 and the fourth belt pulley 424, and the first screw 331 penetrates through the first separation disc 210 and is then assembled and fixed with an output shaft of the motor 410, so that the motor 410 can drive the first screw 331 to rotate circumferentially;
the first belt wheel 421, the second belt wheel 422, the third belt wheel 423 and the fourth belt wheel 424 are connected through a belt 420 to form a belt transmission structure, the belt 420 is pressed through a tension wheel 425 to prevent loosening, the tension wheel 425 is installed on a tension shaft 335, two ends of the tension shaft 335 are rotatably assembled with the first partition plate 210 and the second partition plate 220 respectively, the tension shaft 335 is hollow, the total connection wire passes through the interior of the tension shaft 335, then bypasses the guide wheel 450, and then is wound on the winding drum 440;
the first pulley 421, the second pulley 422, the third pulley 423, the fourth pulley 424, and the tension pulley 425 may be synchronous pulleys, and the belt is a synchronous belt and has synchronous teeth on the inner and outer sides thereof, so as to drive the first pulley 421, the second pulley 422, the third pulley 423, the fourth pulley 424, and the tension pulley 425 to rotate at the same linear velocity.
The guide wheel 450 is rotatably assembled with the guide shaft 340, two ends of the guide shaft 340 are respectively assembled and fixed with the third shaft plate 213 and the fourth shaft plate 214, and the third shaft plate 213 and the fourth shaft plate 214 are respectively fixed on the second partition plate 220;
the winding reel 440 is screwed with the winding shaft 350 through threads, one end of the winding shaft 350 is rotatably assembled with the second shaft plate 212, the other end of the winding shaft 350 penetrates through the first shaft plate 211 and then is fixedly assembled with the second bevel gear 552, and the winding shaft 350 is rotatably assembled with the first shaft plate 211;
two ends of the winding reel 440 are respectively assembled and fixed with a shaft ring of the thrust ball bearing 441, a seat ring of the thrust ball bearing 441 is respectively attached to one end of the resistance spring 430, the other end of the resistance spring 430 is respectively attached to the first shaft plate 211 and the second shaft plate 212, and the resistance spring 430 is respectively sleeved on the winding reel 350. During the use, because bobbin 440 closes the assembly with bobbin 350 soon through the screw thread, so bobbin 350 can drive bobbin 440 circumferential direction when rotating and wind, but because there is resistance spring 430 to provide axial resistance for bobbin 440 and bobbin 350 are asynchronous to rotate (angular velocity is asynchronous), then bobbin 440 will move under the screw thread effect in the axial. So that the total connection 540 is not wound only somewhere on the bobbin but distributed in the axial direction of the bobbin. This can prevent the bobbin from being too thick after being wound, thereby affecting the use.
The second bevel gear 552 is engaged with the first bevel gear 551 for driving, and the first bevel gear 551 is installed at the end of the second screw 332 for directly driving the winding shaft 350 to rotate when the second screw 332 rotates.
In use, the motor 410 drives the first screw 331 to rotate circumferentially, and the first screw 331 drives the second screw 332, the third screw 333, the fourth screw 334 and the tension shaft 425 to rotate through the belt 420, so as to drive the sliding ring 500 to move along the axial direction thereof;
meanwhile, the second screw rod drives the winding shaft to rotate, so that the total connection wire is synchronously wound or released, the total connection wire is prevented from being subjected to large pulling force, the damage of the total connection wire is avoided, meanwhile, the total connection wire is timely wound, the total connection wire can be prevented from being loose, and the total connection wire is wound and hooked with other parts.
The motor 410 is installed on the motor support plate 130, and two ends of the motor support plate 130 are respectively assembled and fixed with the first partition plate 210 and the second partition plate 220.
Since the sliding ring 500 drives the radial eddy current sensor 621 to move synchronously when moving, the radial eddy current sensor 621 can perform multi-point detection in the axial direction of the rotor, thereby realizing that one set of radial eddy current sensor 621 detects multiple first air gaps 101. This is certainly a relatively low cost way, and the same set of radial eddy current sensors 621 detects with relatively stable accuracy, thereby reducing system errors.
In practical use, generally, it is necessary to know where the radial eddy current sensor 621 performs data acquisition, so that positioning of the radial eddy current sensor 621 is very important, and the accuracy of positioning directly affects analysis of later data, accuracy of design parameters, and accuracy of verification. At present, a laser sensor, a position sensor and a photoelectric sensor are generally fixed at a position needing to be fixed in advance, and the object to be detected can be judged to reach a target position after reaching the detection position. This design is suitable for positioning only a small number of positions and the positioning points must have a large spacing, otherwise disturbances will occur. And the cost is high, the structure is complex, and the design concept of the scheme is contrary to the design concept of the scheme. Therefore, the applicant has proposed a positioning assembly which can avoid the above-described situation and has high positioning accuracy.
Referring to fig. 9, 12-13, the positioning assembly includes a positioning plate 660, the positioning plate 660 is fixed inside the protective barrel 110, and the positioning plate 660 is respectively provided with a positioning chute 661, an induction chute 662, a positioning slide hole 663, and a positioning reset hole 664, the positioning chute 661 and the positioning slider 572 are slidably assembled, and the positioning slider 572 is connected and fixed to the power block 510 adjacent to the positioning slider 572 through a positioning connection block 571;
an induction sliding block 573 is arranged at the bottom of the positioning sliding block 572, and the induction sliding block 573 is arranged in the induction sliding chute 662 and can slide in the induction sliding chute 662 in the axial direction of the rotor;
a positioning slide rod 642 is installed in the positioning slide hole 663, one end of the positioning slide rod 642 is provided with a ball 641, the other end of the positioning slide rod 642 is fixed with an elastic sleeve 643, one end of the elastic sleeve 643 is installed in the positioning reset hole 664, the open end of the elastic sleeve 643 is assembled with the inside of the trigger guide cylinder 631 in an axially movable manner, the bottom of the trigger guide cylinder 631 is assembled with the trigger rod 632 in an axially movable manner, the bottom of the trigger rod 632 is assembled and fixed with a trigger button, and the trigger button can refer to a button of an existing remote controller and is triggered by pressure.
The trigger button is arranged on the sensing plate 630, and the sensing plate 630 is fixed on the positioning plate 660. The number of the trigger buttons is multiple, and each trigger button is distributed on the induction plate 630 at a certain interval and is positioned below the induction chute 662;
the trigger guide tube 631 is fixed on the sensing plate 630 and the top thereof is inserted into the positioning reset hole 664. This design allows the positioning slide 642 to accurately apply pressure to the trigger lever, causing the trigger button to be depressed and activated, thereby generating a signal input.
In the initial state, the top of the ball 641 is higher than the bottom surface of the sensing chute 662, and a triggering gap 601 is formed between the positioning slide rod 642 and the triggering rod 632, at this time, the triggering button waits for a signal to be input.
When the induction sliding block 573 passes over the ball 641, the induction sliding block 573 presses the ball 641, so that the positioning sliding rod is pressed downwards in the axial direction, the positioning sliding rod presses the trigger button through the trigger gap 601, the trigger button obtains information input, and the system judges that the induction sliding block reaches the positioning sliding rod, so that the position of the radial eddy current sensor is calculated.
When the sensing slide 573 is not pressed against the ball 641, that is, the sensing slide is not located right above the ball 641, the positioning slide 642 is reset by the elastic force of the elastic sleeve 643 and is higher than the bottom surface of the sensing chute 662 again, at this time, the triggering gap 601 is generated again, and the system determines that the sensing slide 573 moves.
This design is low cost and durable, and the principle is that the remote control button inputs signals, and the induction slider 573 is positioned by numbering and positioning the various trigger buttons. The cost is very low, and the positioning precision is very high. Meanwhile, due to the fact that the trigger buttons are arranged, in practical use, the speed can be reduced as long as the trigger buttons needing to reach the positions are reached, and therefore the positions can be stably reached. And the trigger button can be made very small, namely the high-precision regulation and control can be realized through the intensive trigger buttons, which cannot be achieved by the existing positioning technology.
Preferably, in order to prevent the induction sliding block 573 and the ball 641 from generating a shearing force in the rotor axial direction, thereby affecting the operation thereof, the applicant provides a guide inclined surface 5731 on each side of the induction sliding block 573 in the rotor axial direction. The ball 641 can rotate spherically (in any direction) in the positioning slide rod 642, so that the friction between the sensing slide block 573 and the ball 641 can be effectively reduced, and the service life can be prolonged.
Preferably, in order to position the limit position of the sliding ring 500 in the axial direction, a first travel switch 651 and a second travel switch 652 may be provided at the positions of the third partition plate 230 and the fourth partition plate 240 corresponding to the sensing groove 511, respectively, and when the sensing groove 511 triggers the first travel switch 651 or the second travel switch 652, it is determined that the sliding ring 500 reaches the limit position, and the motor does not rotate in the same direction.
Referring to fig. 14, the elastic sleeve 643 is made of an elastic material and has elasticity, and the elastic sleeve 643 is provided with a fixed sleeve 6433 and a dividing groove 6432, respectively, and the dividing groove 6432 divides the elastic sleeve 643 into a plurality of elastic pieces 6431. This design is mainly to prevent the elastic force of the elastic sleeve 643 from being too large to affect the movement of the positioning slide rod.
Referring to fig. 15, the detection chute 121 is provided with guide slots 122 near the inner side and the outer side, the guide slots 122 are slidably assembled with guide projections 561, and the guide projections 561 are respectively disposed on the outer side of the detection slider 560, so that the radial eddy current sensor 621 can be prevented from moving in the radial direction of the stator; the detection slide block 560 is arranged in the detection slide hole 521, a jacking spring 580 is arranged between the top surface of the detection slide block 560 and the top surface of the inner side of the detection slide hole 521, and the jacking spring 580 jacks the detection slide block 560 on the stator. This design prevents the radial eddy current sensor 621 from moving in the radial direction of the stator due to the imperfect circular shape inside the slip ring 500, thereby affecting the detection accuracy.
The specific use mode of the invention can refer to the Chinese patent application with the publication number of CN 104154853A.
The invention is not described in detail, but is known to those skilled in the art.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the above teachings. Therefore, the technical solutions available to those skilled in the art through logical analysis, reasoning or limited experiments based on the inventive concepts are all within the scope of protection defined by the claims.
Claims (10)
1. The air gap measuring device of the wind driven generator comprises a protection cylinder, wherein two ends of the protection cylinder are opened, a first separation disc, a second separation plate, a third separation disc and a fourth separation disc are sequentially arranged in the protection cylinder from one end opening to the other end opening, and the first separation disc and the fourth separation disc respectively seal the two end openings of the protection cylinder;
the second partition plate and the third partition plate are fixed on the outer wall of the stator, the rotor is installed in the stator, a radial air gap is formed between the inner wall of the stator and the outer wall of the rotor, and an axial air gap is formed between the inner end face of the stator and the end face of the rotor; the method is characterized in that:
the stator is provided with at least two detection sliding grooves penetrating through the side wall of the stator, the detection sliding grooves and the detection sliding blocks can be assembled in a sliding mode, and the sliding direction is the axial direction of the stator;
a radial eddy current sensor is arranged in the detection sliding block, and a plurality of first induction strips are arranged on the circumference of the rotor;
two ends of the stator are respectively assembled and fixed with one end of the first rotating shaft and one end of the second rotating shaft, and the other ends of the first rotating shaft and the second rotating shaft respectively penetrate through the first partition disc and the fourth partition disc and then extend out of the protective cylinder;
one end of the detection slide block, which is far away from the rotor, is arranged in a detection slide hole, the detection slide hole is arranged on the slide ring and extends into the power block, at least two power blocks are arranged, every two power blocks are fixedly connected through a connecting arc plate, so that a slide ring is formed, and the inner side of the slide ring is attached to the outer wall of the stator;
the power block on be provided with the power screw, and at least one power block is provided with respectively on axial both sides and forms the response groove, still is provided with electric connection groove in addition on the power block, connects through the electric connecting plate between two adjacent electric connection grooves, radial eddy current sensor's wire, data line insert in the circuit of electric connection groove to be connected or the communication is connected with external equipment electrically conductive connection through total wiring.
2. The wind power generator air gap measuring device of claim 1, wherein: first response strip in install magnet, when first response strip is close to radial eddy current sensor, it can produce the signal of telecommunication of different intensity according to magnetic field intensity to can judge the distance of a first response strip from radial eddy current sensor.
3. The wind power generator air gap measuring device of claim 1, wherein: and the end surface of the rotor assembled with the first rotor is also provided with a second induction strip, and the end surfaces of the inner sides of the stator and the rotor, which are just opposite to the end surface of the second induction strip, are respectively provided with a key phase sensor and an axial eddy current sensor.
4. The wind power generator air gap measuring device of claim 1, wherein: different power screw holes are respectively assembled with the first screw rod, the second screw rod, the third screw rod and the fourth screw rod in a screwing mode through threads, one ends of the first screw rod, the second screw rod, the third screw rod and the fourth screw rod are rotatably assembled with the fourth partition disc, the other ends of the first screw rod, the second screw rod, the third screw rod and the fourth screw rod penetrate through the first partition disc and then are respectively assembled and fixed with the first belt wheel, the second belt wheel, the third belt wheel and the fourth belt wheel, and the first screw rod penetrates through the first partition disc and then is assembled and fixed with an output shaft of the motor;
the first belt wheel, the second belt wheel, the third belt wheel and the fourth belt wheel are connected through a belt to form a belt transmission structure, the belt is tightly pressed through a tensioning wheel, the tensioning wheel is installed on a tensioning shaft, two ends of the tensioning shaft are rotatably assembled with the first partition plate and the second partition plate respectively, the tensioning shaft is hollow, and the general wiring penetrates through the interior of the tensioning shaft and then bypasses the guide wheel and then is wound on the winding drum.
5. The wind turbine air gap measuring device of claim 4, wherein: the first belt wheel, the second belt wheel, the third belt wheel, the fourth belt wheel and the tensioning wheel are synchronous belt wheels, the belt is a synchronous belt, and the inner side and the outer side of the belt are respectively provided with synchronous clamping teeth.
6. The wind turbine air gap measuring device of claim 4, wherein: the guide wheel is rotatably assembled with the guide shaft, two ends of the guide shaft are respectively assembled and fixed with the third shaft plate and the fourth shaft plate, and the third shaft plate and the fourth shaft plate are respectively fixed on the second partition plate;
the winding reel is assembled with the winding shaft in a screwing mode through threads, one end of the winding shaft is rotatably assembled with the second shaft plate, the other end of the winding shaft penetrates through the first shaft plate and then is assembled and fixed with the second bevel gear, and the winding shaft is rotatably assembled with the first shaft plate; two ends of the winding reel are respectively assembled and fixed with a shaft ring of a thrust ball bearing, a seat ring of the thrust ball bearing is respectively attached to one end of a resistance spring, the other end of the resistance spring is respectively attached to a first shaft plate and a second shaft plate, and the resistance springs are respectively sleeved on the winding reel;
the second bevel gear is in meshing transmission with the first bevel gear, and the first bevel gear is installed at the end part of the second screw rod.
7. The wind power generator air gap measuring device of claim 1, wherein: the positioning assembly comprises a positioning plate, the positioning plate is fixed on the inner side of the protective barrel, a positioning chute, an induction chute, a positioning slide hole and a positioning reset hole are respectively arranged on the positioning plate, the positioning chute and the positioning slide block can be assembled in a sliding manner, and the positioning slide block is connected and fixed with the power block close to the positioning slide block through a positioning connecting block;
the bottom of the positioning slide block is provided with an induction slide block, and the induction slide block is arranged in the induction slide groove and can slide in the induction slide groove and in the axial direction of the rotor;
a positioning slide rod is arranged in the positioning slide hole, one end of the positioning slide rod is provided with a ball, the other end of the positioning slide rod is fixed with an elastic sleeve, one end of the elastic sleeve is arranged in the positioning reset hole, the open end of the elastic sleeve and the interior of the triggering guide cylinder can be assembled in an axially movable mode, the bottom of the triggering guide cylinder and the triggering rod can be assembled in an axially movable mode, and the bottom of the triggering rod and the triggering button are assembled and fixed;
the trigger button is arranged on the induction plate, and the induction plate is fixed on the positioning plate.
8. The wind turbine air gap measuring device of claim 7, wherein: the number of the trigger buttons is multiple, and each trigger button is distributed on the induction plate at intervals and is positioned below the induction sliding groove;
the trigger guide cylinder is fixed on the induction plate, and the top of the trigger guide cylinder is arranged in the positioning reset hole;
in the initial state, the top of the ball is higher than the bottom surface of the induction sliding groove, a trigger gap is formed between the positioning sliding rod and the trigger rod, and the trigger button waits for signal input at the moment.
9. The wind turbine air gap measuring device of claim 7, wherein: the two sides of the induction slide block, which are positioned in the axial direction of the rotor, are respectively provided with a guide inclined plane, and the ball can rotate in a spherical manner in the positioning slide rod.
10. The wind power generator air gap measuring device of claim 1, wherein: guide notches are respectively arranged near the inner side and the outer side of the detection sliding chute, the guide notches are respectively assembled with the guide lugs in a sliding manner, and the guide lugs are respectively arranged on the outer sides of the detection sliding blocks; the detection slide block is arranged in the detection slide hole, a jacking spring is arranged between the top surface of the detection slide block and the top surface of the inner side of the detection slide hole, and the jacking spring jacks the detection slide block on the stator.
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| CN110332899A (en) * | 2019-08-21 | 2019-10-15 | 国家电网有限公司 | A kind of generator air gap measuring device and its measurement method |
| CN114088046B (en) * | 2021-11-15 | 2023-03-24 | 北京航空航天大学 | Aeroengine detection device |
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