CN115420369A - Driving and guiding integrated single-end side excitation cylindrical electromagnetic driving device - Google Patents
Driving and guiding integrated single-end side excitation cylindrical electromagnetic driving device Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to the technical field of vibration measurement, in particular to a single-end side excitation cylindrical electromagnetic driving device integrating driving and guiding, which comprises an electromagnetic driving part and a moving part, wherein the electromagnetic driving part comprises a driving shaft and a driving shaft; the electromagnetic driving part comprises a lower magnetic yoke, an annular permanent magnet arranged on the upper side of the lower magnetic yoke and an annular upper magnetic yoke arranged on the upper side of the permanent magnet; the inner sides of the lower magnetic yoke, the permanent magnet and the upper magnetic yoke form a motion cavity; a central magnetic yoke is arranged on the lower magnetic yoke and positioned inside the motion cavity; an air gap is arranged between the central magnetic yoke and the upper magnetic yoke; the moving part comprises a working table top positioned on the upper side of the central magnetic yoke, a coil framework is arranged on one side surface of the working table top close to the central magnetic yoke, and the coil framework is sleeved on the outer side of the central magnetic yoke in a sliding manner; the outer side wall of the coil framework is wound with a direct current coil and an exciting coil. By adopting the scheme, the assembly difficulty of the moving part is reduced to the greatest extent, the self weight of the moving part is reduced, and the assembly precision and the driving capability of the electromagnetic driving device are effectively improved.
Description
Technical Field
The invention relates to the technical field of vibration measurement, in particular to a single-end side excitation cylindrical electromagnetic driving device integrating driving and guiding.
Background
The electromagnetic driving device has wide application in the field of vibration and is a core component of equipment such as an electromagnetic vibration table, a voice coil motor and the like. Generally, an electromagnetic driving device is provided with a separated driving and guiding mechanism, errors are inevitably introduced during assembly, the electromagnetic driving waveform is distorted, and a moving part generates transverse vibration; the size of the moving part is increased by the separated driving and guiding mechanism, and the large-size moving part has large mass, so that the electromagnetic driving capability of the electromagnetic driving device can be weakened, and the miniaturization of the equipment volume is not facilitated. Therefore, the key for improving the performance of the electromagnetic driving device is to finish the high assembly precision of the electromagnetic driving device and the light weight of the moving part by a simple and reliable design method.
Patent No. CN201510236281.5 discloses a magnetic field tracking compensated double-permanent-magnet-tube two-end symmetric excitation cylindrical low-frequency vibration calibration table. The cylindrical closed magnetic field structure design is provided, two cylindrical permanent magnetic tubes are symmetrically arranged at two ends of an electromagnetic driving structure and are oppositely arranged with the same magnetic pole, two symmetrical closed magnetic circuits are formed by magnetic yokes, high-uniformity magnetic induction intensity distribution is generated in an air gap, the surface of the magnetic yoke adjacent to the air gap is provided with a deep groove type array type microstructure, eddy current loss is effectively inhibited, a compensation coil is arranged on a central magnetic yoke, the influence of a compensation magnetic field formed on armature reaction is synchronously tracked and compensated, and the motion guiding precision is ensured by adopting a static pressure air flotation guiding technology.
Patent No. CN201811332560.1 discloses a vibration table. A magnetic field is generated through a magnetic circuit device, and an air bearing is fixed on the periphery of a moving coil framework, so that transverse disturbance is reduced. The direct current coil and the exciting coil are radially wound on the outer peripheral wall of the movable coil framework, the direct current coil is positioned in the linear magnetic field region, and the direct current excitation is conducted to position the movable coil at a position where the direct current ampere force is equal to the gravity of the movable coil so as to counteract the gravity and determine a zero position. The exciting coil is positioned in the uniform magnetic field region and is excited by alternating current to generate standard vibration.
The technical scheme is mainly characterized in that: the separated guide device and the separated driving structure require that the electromagnetic driving structure and the guide device are coaxially and fixedly installed in the assembling process, the assembling difficulty is high, the vibration waveform is easy to distort, and transverse vibration is generated; the guide and drive mechanism needs to be connected with an additional mechanical part, the moving part has large size and heavy mass, the load capacity of the electromagnetic drive device is severely restricted, and the large load capacity is very important for a low-frequency electromagnetic vibration table which is usually calibrated by a large-scale vibration sensor; and patent CN201811332560.1 places a dc coil in a linear magnetic field region which is only approximately linear, and the nonlinearity thereof may bring harmonic distortion to the vibration waveform.
In conclusion, the structure and principle innovation of the electromagnetic vibration calibration table provides the single-end side excitation cylindrical electromagnetic driving device integrating driving and guiding.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the single-end side excitation cylindrical electromagnetic driving device integrating driving and guiding, so that the moving part is simpler to assemble, the self weight of the moving part is reduced, and the assembling precision and the driving capability of the electromagnetic driving device are effectively improved.
(II) technical scheme
In order to achieve the above object, an embodiment of the present application provides a single-ended lateral excitation cylindrical electromagnetic driving device integrating driving and guiding, including an electromagnetic driving component and a moving component; the electromagnetic driving part comprises a lower magnetic yoke, an annular permanent magnet arranged on the upper side of the lower magnetic yoke and an annular upper magnetic yoke arranged on the upper side of the permanent magnet; the lower magnetic yoke, the permanent magnet and the inner side of the upper magnetic yoke form a motion cavity; a central magnetic yoke is arranged on the lower magnetic yoke and positioned inside the motion cavity; an air gap is arranged between the central magnetic yoke and the upper magnetic yoke; the moving part comprises a working table top positioned on the upper side of the central magnetic yoke, a coil framework is arranged on one side surface of the working table top close to the central magnetic yoke, and the coil framework is annular and is sleeved on the outer side of the central magnetic yoke in a sliding manner; the outer side wall of the coil framework is wound with a direct current coil and an exciting coil, and the direct current coil is connected with direct current with a fixed size so as to generate an ampere force opposite to the gravity direction of the moving part; the exciting coil is electrified with controllable driving current to generate electromagnetic driving force.
Preferably, a static pressure air flotation structure is arranged on the coil framework and controls a static pressure air film to be formed between the coil framework and the central magnetic yoke.
Preferably, the static pressure air flotation structure comprises an air chamber arranged in the coil framework, one side surface of the coil framework, which is close to the central magnetic yoke, is provided with air outlet holes, the air outlet holes are communicated with the air chamber, and the air outlet holes are uniformly distributed on the inner surface of the coil framework; an air inlet is formed in the outer surface, away from the central magnetic yoke, of the coil framework and connected with the air chamber, and the air inlet is connected with an air supply source.
Preferably, the lower magnetic yoke, the permanent magnet and the upper magnetic yoke are coaxially arranged; the central magnetic yoke is positioned at the central position of the lower magnetic yoke.
Preferably, an installation component for fixing the permanent magnet and supporting the space where the permanent magnet is located is arranged between the lower magnetic yoke and the upper magnetic yoke.
Preferably, the mounting assembly comprises an inboard mounting bracket and an outboard mounting bracket; the inner side mounting frame is annular, an annular mounting groove is formed in the inner side mounting frame, and a mounting hole is formed in the inner side mounting frame and is positioned at the bottom of the mounting groove; the inner side wall of the inner side mounting frame abuts against the central magnetic yoke, the outer side wall of the inner side mounting frame abuts against the permanent magnet, the lower side of the mounting frame is detachably connected with the lower magnetic yoke, and the upper side of the mounting frame abuts against the upper magnetic yoke; the outer side mounting frame is annular and covers the permanent magnet, the upper side of the outer side mounting frame is detachably and fixedly connected with the upper magnetic yoke, and the lower side of the outer side mounting frame is detachably and fixedly connected with the lower magnetic yoke; the inner side of the outer side mounting frame is abutted to the permanent magnet.
Preferably, a sliding guide rail or a rolling guide rail is arranged between the coil bobbin and the central magnetic yoke.
Preferably, the permanent magnet comprises one permanent magnet or a plurality of permanent magnets which are adhered to each other.
Preferably, the direct current coil and the exciting coil are positioned in the air gap and in the region with uniform magnetic field distribution; the dc coil and the exciting coil may be connected to each other.
Preferably, the fixed magnitude direct current is calculated by the following formula: I.C. A DC = mg/(BL); in the formula, I DC The magnitude of the direct current passed through the direct current coil, m is the mass of the moving part and the related components fixed on the working table, g is the gravity acceleration, B is the average magnetic induction intensity distributed in the air gap, and L is the length of the direct current coil.
(III) advantageous effects
The invention provides a single-end side excitation cylindrical electromagnetic driving device integrating driving and guiding, which can realize the quick coaxial installation of a lower magnetic yoke, a permanent magnet and an upper magnetic yoke by arranging the lower magnetic yoke, the permanent magnet, the upper magnetic yoke and an installation assembly, and simultaneously, the assembly difficulty of a moving part is reduced to the greatest extent by the scheme of the integrated design of the static pressure air flotation structure and the central magnetic yoke, the self weight of the moving part is reduced, and the assembly precision and the driving capability of the electromagnetic driving device can be effectively improved; in addition, the direct current coil is positioned in a uniform magnetic field distribution area, and interference is prevented from being introduced.
The method has the following specific beneficial effects:
(1) The permanent magnet single-end side excitation magnetic circuit structure adopted by the invention can generate magnetic induction intensity which is distributed more uniformly in the air gap, has small influence on the air gap edge effect, and is suitable for occasions with higher requirements on motion precision. The permanent magnet is positioned on the side of the magnetic circuit, and the size of the permanent magnet is matched with the structure of the magnetic circuit, so that the assembly is simpler and more convenient. The annular permanent magnet which is magnetized in the axial direction is used, so that the manufacturing is convenient, and the production cost is low.
(2) According to the invention, the central magnetic yoke is processed into the guide shaft, and the coil framework is made into the sliding mechanism, so that the design of the precise guide and drive integrated electromagnetic driving device is completed, high assembly precision is realized, and the movement precision is improved. The moving part is sleeved on a guide shaft formed by the central magnetic yoke, and the integration of guiding and driving is realized through a static pressure air flotation structure, a sliding guide rail form or a rolling guide rail form, so that the coaxiality of the moving part and an electromagnetic driving structure is improved, the high assembly precision is achieved, and the waveform precision of electromagnetic driving is effectively improved.
(3) The electromagnetic driving device provided by the invention has the advantages of compact structure and strong load capacity. The electromagnetic driving device integrating guiding and driving does not need an additional guiding mechanism, and the device has small outer size and is beneficial to installation and transportation of equipment. No additional guide mechanism occupies extra space, the size of the moving part is reduced, the light weight of the moving part is structurally realized, and the load capacity of the electromagnetic driving device is effectively improved.
(4) The invention can avoid the problem that the direct current coil is subjected to nonlinear electromagnetic force outside the air gap to generate vibration harmonic waves. The direct current coil is arranged in the air gap magnetic field distribution uniform area, and the direct current with fixed magnitude is conducted to enable the direct current coil to be subjected to ampere force equal to the gravity of the moving part, so that the direct current coil is prevented from being subjected to nonlinear electromagnetic force outside an air gap to generate harmonic interference.
Drawings
FIG. 1 is a schematic structural diagram of a single-ended side-excitation cylindrical electromagnetic driving device with integrated driving and guiding;
FIG. 2 is a cross-sectional view of a single ended side-exciting cylindrical electromagnetic drive integrated with drive and guide;
FIG. 3 is a cross-sectional view of a protruding mounting component in a single ended side-exciting cylindrical electromagnetic drive integrated drive and guide;
FIG. 4 is a schematic view of a protruding inboard mounting bracket in a single ended side-exciting cylindrical electromagnetic drive with integral drive and guidance;
FIG. 5 is a schematic view of a protruding outboard mounting bracket in a single ended side-exciting cylindrical electromagnetic drive with integral drive and guidance;
FIG. 6 is a schematic diagram of magnetic pole distribution and magnetic circuit in a single-ended side-edge excitation cylindrical electromagnetic driving device with integrated driving and guiding;
FIG. 7 is a cross-sectional view of the protruding moving parts of the single ended side-excited cylindrical electromagnetic drive with integrated drive and guidance;
FIG. 8 is a schematic diagram of a protruding static pressure air-floating structure in a single-ended side-exciting cylindrical electromagnetic driving device with integrated driving and guiding;
fig. 9 is a schematic diagram of the position of a protruding air inlet in a single-ended side-edge excitation cylindrical electromagnetic driving device integrating driving and guiding.
In the drawings, the reference numbers:
100. an electromagnetic drive component; 110. a lower magnetic yoke; 120. a permanent magnet; 130. an upper magnetic yoke; 140. a motion cavity; 150. a central magnetic yoke; 160. an air gap; 170. mounting the component; 171. an inner side mounting bracket; 171a, a mounting groove; 171b, mounting holes; 172. an outer mounting bracket;
200. a moving part; 210. a work table; 220. a coil bobbin; 230. a direct current coil; 240. an exciting coil; 250. a static pressure air flotation structure; 251. an air chamber; 252. an air outlet; 253. an air inlet hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The invention provides a single-end side excitation cylindrical electromagnetic driving device integrating driving and guiding, and the device comprises an electromagnetic driving part 100 and a moving part 200, and is shown in figures 1-9.
The electromagnetic driving part 100 includes a lower magnetic yoke 110, a permanent magnet 120 having a ring shape disposed on an upper side of the lower magnetic yoke 110, and an upper magnetic yoke 130 having a ring shape disposed on an upper side of the permanent magnet 120; the lower yoke 110, the permanent magnet 120 and the inner side of the upper yoke 130 form a movement cavity 140; a center yoke 150 is installed on the lower yoke 110 and inside the movement chamber 140; an air gap 160 is provided between the center yoke 150 and the upper yoke 130. In this embodiment, the width of the air gap 160 is 10mm, in which a high uniformity of magnetic induction distribution is formed.
Further, the lower yoke 110, the permanent magnet 120, and the upper yoke 130 are coaxially disposed; the center yoke 150 is located at the center of the lower yoke 110.
A mounting assembly 170 for fixing the permanent magnet 120 and supporting a space in which the permanent magnet 120 is located is provided between the lower yoke 110 and the upper yoke 130.
The mounting assembly 170 includes an inboard mounting bracket 171 and an outboard mounting bracket 172. The inner mounting bracket 171 is annular, an annular mounting groove 171a is formed in the inner mounting bracket 171, and a mounting hole 171b is formed in the inner mounting bracket 171 and located at the bottom of the mounting groove 171 a; when being mounted, the lower yoke 110 may be fixedly coupled to the lower yoke by bolts passing through the mounting holes 171 b. Inside wall butt center yoke 150 of inboard mounting bracket 171, outside wall butt permanent magnet 120, the connection lower yoke 110 can be dismantled to the downside of mounting bracket, and yoke 130 is gone up in the upside butt of mounting bracket. The upper yoke 130 on the upper side can be supported by the inner mounting bracket 171, and it can be ensured that the permanent magnet 120 does not receive the gravity of the upper yoke 130.
Outside mounting bracket 172 is annular, and covers permanent magnet 120, and fixed connection can be dismantled with upper yoke 130 to the upside of outside mounting bracket 172, and fixed connection can be dismantled with lower yoke 110 to the downside of outside mounting bracket 172, and outside mounting bracket 172 inboard and permanent magnet 120 butt. The detachable connection may be fixed by bolts or other connection methods, which are not limited herein.
It should be noted that, in the present embodiment, the outer mounting bracket 172 and the inner mounting bracket 171 are made of a non-magnetic material, such as an aluminum alloy.
The permanent magnet 120 includes one permanent magnet 120 or a plurality of permanent magnets 120 bonded to each other.
Specifically, the permanent magnet 120 may be a ferromagnetic permanent magnet made of NdFeB, and the NdFeB material used has a remanence of 1.17T and a coercivity of 890kA/m. The lower magnetic yoke 110, the central magnetic yoke 150 and the upper magnetic yoke 130 are all made of high-permeability electrical pure iron material DT4C, the maximum relative permeability can reach 12000, and the saturation magnetic flux is 2.5T.
The path through which the magnetic lines of force of the permanent magnet 120, which are excited to form a main magnetic circuit, pass from the N-pole of the permanent magnet 120, sequentially pass through the lower yoke 110, the central yoke 150, the air gap 160, and the upper yoke 130, and then return to the S-pole of the permanent magnet 120 to form a closed magnetic circuit is shown in fig. 6.
The material of the moving part 200 is ceramic or aluminum alloy or beryllium. The magnetic field coil comprises a worktable 210 positioned on the upper side of a central magnet yoke 150, wherein a coil framework 220 is arranged on one side surface of the worktable 210 close to the central magnet yoke 150, and the coil framework 220 is annular and is sleeved on the outer side of the central magnet yoke 150 in a sliding manner; a direct current coil 230 and an exciting coil 240 are wound on the outer side wall of the coil frame 220, and direct current with a fixed size is introduced into the direct current coil 230 to generate an ampere force opposite to the gravity direction of the moving part 200; the exciting coil 240 is energized with a controllable driving current to generate an electromagnetic driving force.
The moving member 200 is made of aluminum alloy and has a cylindrical shape as a whole.
The direct current coil 230 and the exciting coil 240 are formed by winding insulated copper enameled wires on the outer surface of the coil framework 220, the thickness is 3mm, and the maximum current density is 5A/mm 2 . After the magnetic circuit structure of the electromagnetic vibration table is assembled, the dc coil 230, the exciting coil 240 and the bobbin 220 are located in the air gap 160.
The fixed magnitude direct current is calculated by the following equation: I.C. A DC = mg/(BL). In the formula, I DC The magnitude of the dc current passed through the dc coil 230, m is the mass of the moving part 200 and the related components fixed on the table 210, g is the gravitational acceleration, B is the average magnetic induction distributed in the air gap 160, and L is the length of the dc coil 230.
The direct current coil 230 and the excitation coil 240 are positioned in the air gap 160 and in a region with uniform magnetic field distribution; when the dc coil 230 is not required to counteract the gravity of the moving member 200, the dc coil 230 and the exciting coil 240 may be connected to each other, and a driving current is supplied to achieve a large electromagnetic driving force.
After the control signal is input into the exciting coil 240 and amplified by the power amplifier, the effective value of the power current can reach dozens of amperes, and according to the electromagnetic field theory, the exciting coil 240 electrified in the magnetic field is acted by the ampere force in the vertical direction, so that the precise and controllable electromagnetic driving force is output. The magnitude and direction of the electromagnetic driving force can be precisely controlled by controlling the magnitude and direction of the current. If the control signal is a standard sinusoidal electrical signal, the moving part 200 will generate a standard sinusoidal vibration in the axial direction under the action of the electromagnetic driving force.
In one embodiment, the bobbin 220 is provided with a static pressure air floating structure 250, and the static pressure air floating structure 250 controls the formation of a static pressure air film between the bobbin 220 and the central yoke 150. The static pressure air bearing structure 250 is used to generate vertical standard vibration, and in this embodiment, the maximum stroke is 10mm.
The static pressure air floating structure 250 comprises a cylindrical cavity type air chamber 251 arranged in the coil framework 220, one side surface of the coil framework 220 close to the central magnetic yoke 150 is provided with air outlet holes 252, the air outlet holes 252 are communicated with the air chamber 251, and the air outlet holes 252 are uniformly distributed on the inner surface of the coil framework 220. An air inlet hole 253 is formed in the outer surface of the coil frame 220 away from the central magnetic yoke 150, the air inlet hole 253 is connected with the air chamber 251, and the air inlet hole 253 is connected with an air supply source. Specifically, the diameter of the air hole may be 2mm.
In this embodiment, the lower cross section of the bobbin 220 is annular, and the diameter is 80mm. The static pressure air-floating structure 250 is sleeved on the central magnetic yoke 150 through the coil framework 220, so that the static pressure air-floating guide rail and the electromagnetic driving structure are completely parallel in the axial direction, and the assembly precision is ensured; the inside surface of the bobbin 220 is fitted to the size of the center yoke 150 during the assembly process, so that the bobbin 220 and the center yoke 150 can be easily fitted together, and the assembly has high reliability.
In another embodiment, a sliding guide or a rolling guide may be further disposed between the bobbin 220 and the center yoke 150.
The invention provides a single-end side excitation cylindrical electromagnetic driving device integrating driving and guiding, which can realize the quick coaxial installation of a lower magnetic yoke 110, a permanent magnet 120 and an upper magnetic yoke 130 through the arrangement of the lower magnetic yoke 110, the permanent magnet 120, the upper magnetic yoke 130 and an installation assembly 170, and simultaneously, the assembly difficulty of a moving part 200 is reduced to the greatest extent through the scheme of the integrated design of a static pressure air floating structure 250 and a central magnetic yoke 150, the dead weight of the moving part 200 is reduced, and the assembly precision and the driving capability of the electromagnetic driving device can be effectively improved; in addition, the dc coil 230 is located in the uniform magnetic field distribution region, so as to avoid introducing interference.
The method has the following specific beneficial effects:
(1) The magnetic circuit structure excited by the single-end side of the permanent magnet 120 adopted by the invention can generate magnetic induction intensity which is distributed more uniformly in the air gap 160, and the influence of the edge effect of the air gap 160 is small, so that the magnetic circuit structure is suitable for occasions with higher requirements on motion precision. The permanent magnet 120 is positioned on the side of the magnetic circuit, and the size of the permanent magnet is matched with the structure of the magnetic circuit, so that the assembly is simpler and more convenient. The annular permanent magnet 120 which is axially magnetized is used, so that the manufacturing is convenient, and the production cost is low.
(2) According to the invention, the central magnetic yoke 150 is processed into the guide shaft, and the coil framework 220 is made into the sliding mechanism, so that the design of the precise guide and drive integrated electromagnetic driving device is completed, high assembly precision is realized, and the movement precision is improved. The moving part 200 is sleeved on a guide shaft formed by the central magnetic yoke 150, and the integration of guiding and driving is realized through a static pressure air floating structure 250, a sliding guide rail form or a rolling guide rail form, so that the coaxiality of the moving part 200 and an electromagnetic driving structure is improved, the high assembly precision is achieved, and the waveform precision of electromagnetic driving is effectively improved.
(3) The electromagnetic driving device provided by the invention has the advantages of compact structure and strong load capacity. The electromagnetic driving device integrating guiding and driving does not need an additional guiding mechanism, has small external size and is beneficial to the installation and transportation of equipment. No additional guide mechanism occupies extra space, the size of the moving part 200 is reduced, the light weight of the moving part 200 is realized structurally, and the load capacity of the electromagnetic driving device is effectively improved.
(4) The present invention can avoid the problem that the direct current coil 230 is subjected to nonlinear electromagnetic force outside the air gap 160 to generate vibration harmonics. The dc coil 230 is disposed in the uniform magnetic field distribution region of the air gap 160, and a dc current with a fixed magnitude is applied to the dc coil 230 to apply an ampere force equal to the gravity of the moving member 200, so as to prevent the dc coil 230 from applying a non-linear electromagnetic force outside the air gap 160 to generate harmonic interference.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a cylindrical electromagnetic drive device of drive and integrative single-ended side excitation of direction which characterized in that: comprises an electromagnetic driving component (100) and a moving component (200);
the electromagnetic driving part (100) comprises a lower magnetic yoke (110), an annular permanent magnet (120) arranged on the upper side of the lower magnetic yoke (110), and an annular upper magnetic yoke (130) arranged on the upper side of the permanent magnet (120); the lower magnetic yoke (110), the permanent magnet (120) and the upper magnetic yoke (130) enclose to form a moving cavity (140); a central magnetic yoke (150) is arranged on the lower magnetic yoke (110) and positioned at the inner side of the movement cavity (140); an air gap (160) is arranged between the central magnetic yoke (150) and the upper magnetic yoke (130);
the moving part (200) comprises a working table top (210) positioned on the upper side of the central magnetic yoke (150), a coil framework (220) is arranged on one side surface, close to the central magnetic yoke (150), of the working table top (210), and the coil framework (220) is annular and is in sliding sleeve joint with the outer side of the central magnetic yoke (150); a direct current coil (230) and an exciting coil (240) are wound on the outer side wall of the coil framework (220), and direct current with a fixed size is introduced into the direct current coil (230) to generate an ampere force opposite to the gravity direction of the moving part (200); the exciting coil (240) is energized with a controllable driving current to generate an electromagnetic driving force.
2. The integrated drive and guide single ended side-excited cylindrical electromagnetic drive of claim 1, wherein: and a static pressure air floatation structure (250) is arranged on the coil framework (220), and the static pressure air floatation structure (250) controls a static pressure air film to be formed between the coil framework (220) and the central magnetic yoke (150).
3. The integrated drive and guide single ended side-excited cylindrical electromagnetic drive of claim 2, wherein: the static pressure air floating structure (250) comprises a cylindrical cavity type air chamber (251) arranged in the coil framework (220), one side surface, close to the central magnetic yoke (150), of the coil framework (220) is provided with air outlet holes (252), the air outlet holes (252) are communicated with the air chamber (251), and the air outlet holes (252) are uniformly distributed on the inner surface of the coil framework (220);
an air inlet hole (253) is formed in the outer surface, away from the central magnetic yoke (150), of the coil framework (220), the air inlet hole (253) is connected with the air chamber (251), and the air inlet hole (253) is connected with an air supply source.
4. The drive and guide integrated single ended side excited cylindrical electromagnetic drive of claim 1, wherein: the lower magnetic yoke (110), the permanent magnet (120) and the upper magnetic yoke (130) are coaxially arranged; the center yoke (150) is located at the center of the lower yoke (110).
5. The integrated drive and guide single ended side-excited cylindrical electromagnetic drive of claim 4, wherein: and an installation assembly (170) for fixing the permanent magnet (120) and supporting the space where the permanent magnet (120) is located is arranged between the lower magnetic yoke (110) and the upper magnetic yoke (130).
6. The single-ended side-excited cylindrical electromagnetic drive of claim 5, wherein: the mounting assembly (170) includes an inboard mounting bracket (171) and an outboard mounting bracket (172);
the inner side mounting frame (171) is annular, an annular mounting groove (171 a) is formed in the inner side mounting frame (171), and a mounting hole (171 b) is formed in the inner side mounting frame (171) and located at the bottom of the mounting groove (171 a); the inner side wall of the inner mounting frame (171) is abutted against the central magnetic yoke (150), the outer side wall of the inner mounting frame (171) is abutted against the permanent magnet (120), the lower side of the inner mounting frame (171) is detachably connected with the lower magnetic yoke (110), and the upper side of the inner mounting frame (171) is abutted against the upper magnetic yoke (130);
the outer side mounting frame (172) is annular and covers the permanent magnet (120), the upper side of the outer side mounting frame (172) is detachably and fixedly connected with the upper magnetic yoke (130), and the lower side of the outer side mounting frame (172) is detachably and fixedly connected with the lower magnetic yoke (110); the inner side of the outer mounting frame (172) is abutted against the permanent magnet (120).
7. The integrated drive and guide single ended side-excited cylindrical electromagnetic drive of claim 1, wherein: and a sliding guide rail or a rolling guide rail is arranged between the coil framework (220) and the central magnetic yoke (150).
8. The drive and guide integrated single ended side excited cylindrical electromagnetic drive of claim 1, wherein: the permanent magnet (120) comprises one permanent magnet (120) or a plurality of permanent magnets (120) which are adhered to each other.
9. The drive and guide integrated single ended side excited cylindrical electromagnetic drive of claim 1, wherein: the direct current coil (230) and the exciting coil (240) are positioned in the air gap (160) and in a region with uniform magnetic field distribution;
the DC coil (230) and the excitation coil (240) are connectable to each other.
10. The drive and guide integrated single ended side excited cylindrical electromagnetic drive of claim 1, wherein: the fixed magnitude direct current is calculated by the following equation: I.C. A DC = mg/(BL); in the formula, I DC The magnitude of the direct current passed through the direct current coil (230), m is the mass of the moving part (200) and the related components fixed on the working table (210), g is the gravitational acceleration, B is the average magnetic induction distributed in the air gap (160), and L is the length of the direct current coil (230).
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| CN202211002139.0A CN115420369A (en) | 2022-08-21 | 2022-08-21 | Driving and guiding integrated single-end side excitation cylindrical electromagnetic driving device |
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