CN110986753B - Double-redundancy non-contact transformer type angular displacement sensor - Google Patents
Double-redundancy non-contact transformer type angular displacement sensor Download PDFInfo
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- CN110986753B CN110986753B CN201911200528.2A CN201911200528A CN110986753B CN 110986753 B CN110986753 B CN 110986753B CN 201911200528 A CN201911200528 A CN 201911200528A CN 110986753 B CN110986753 B CN 110986753B
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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
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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Abstract
The invention belongs to the technical field of sensors, and particularly relates to a high-reliability and high-precision dual-redundancy non-contact rotary transformer type angular displacement sensor. The rotor comprises an installation shell, a protective shell, a first stator winding, a fixed magnetic isolation sleeve, a second stator winding, a rotary drum, a first bearing, a second bearing and an integrated rotor assembly; the integrated rotor assembly comprises a rotating shaft, a first rotor core, a movable magnetic isolation sleeve and a second rotor core. The invention effectively improves the angle measurement precision and the vibration resistance of the sensor by optimizing the processing technology of the stator and rotor cores, adjusting the position of the stator winding, arranging the magnetic isolation sleeve, integrating the rotating shaft, adding the limit ring and the like, reduces the output consistency error of the two channels and avoids the cross interference between the channels. Meanwhile, the problems of difficulty in processing, assembly and adjustment processes, poor manufacturability, low production efficiency and the like caused by the traditional structure are solved.
Description
Technical Field
The invention belongs to the technical field of sensors, and particularly relates to a high-reliability and high-precision dual-redundancy non-contact rotary transformer type angular displacement sensor.
Background
As the mechanical transmission system on the aircraft is replaced more and more by the electronic control system, the application of the resolver type angular displacement sensor in the aircraft system is also more and more extensive. They provide precise angular position information for the flight control system.
The brush and the slip ring used for transmitting signals in the conventional rotary transformer type angular displacement sensor are the weakest links in reliability, and the sliding contact between the brush and the slip ring limits the service life and reliability of the sensor. In addition, contact-type rotary transformers often generate noise, and are not suitable for certain noise-sensitive occasions. After reasonable brushless technology is adopted in design, contact links such as electric brushes, slip rings and the like are eliminated, the reliability and the service life of the rotary transformer can be improved in multiples, interference to other devices is eliminated, and the reliability of a system is improved. Brushless non-contact resolvers will occupy an increasingly important position in the field of airborne measurements.
In addition, for complex aircraft measurement and control systems with high reliability and long life requirements, redundant designs are preferred. More than one set of elements completing the same function are added at the key position in the system, when one path of the part has a fault, the system can still work normally, so that the fault rate of the system or equipment is reduced, and the reliability of the system or the equipment is improved. In order to solve the problem, people form two non-coaxial single-redundancy rotary transformer type angular displacement sensors into a split type layout, and the sensors are mutually redundant. That is, an input shaft connected with the tested body drives the respective rotating shafts of the two sensors through gear transmission, thereby realizing the independent output of the two sensors. Meanwhile, the consistency requirement of the output of the two sensors is ensured by adjusting the zero angle of the two sensors. However, the two sensors are actually not coaxial, so that consistency adjustment is difficult, and the gear mechanism with transmission is easy to block, so that the reliability is lower, the product size is large, the measurement precision is low, and the maintenance cost is high.
In view of the above technical problems, it is necessary to develop a new dual-redundancy resolver type angular displacement sensor with a non-contact measurement method.
Disclosure of Invention
The invention aims to design a dual-redundancy non-contact rotary transformer type angular displacement sensor with high reliability and high precision aiming at the requirement of an airplane measurement and control system. Through the optimization of the processing technology of the stator and rotor cores, the position of the stator winding is adjustable, the angle measurement precision and the vibration resistance of the sensor are effectively improved in the forms of arranging the magnetism isolating sleeve, integrating the rotating shaft, additionally arranging the limiting ring and the like, the output consistency error of the two channels is reduced, and the cross interference between the channels is avoided. Meanwhile, the problems of difficulty in processing, assembly and adjustment processes, poor manufacturability, low production efficiency and the like caused by the traditional structure are solved.
In order to achieve the purpose, the invention adopts the technical scheme that: a dual-redundancy non-contact transformer type angular displacement sensor comprises an installation shell, a protection shell, a first stator winding, a fixed magnetic isolation sleeve, a second stator winding, a rotary drum, a first bearing, a second bearing and an integrated rotor combination; the integrated rotor combination comprises a rotating shaft, a first rotor iron core, a movable magnetic isolation sleeve and a second rotor iron core;
the first stator winding, the fixed magnetic isolation sleeve, the second stator winding, the rotary drum, the first bearing, the second bearing and the integrated rotor are arranged in the protective shell in a combined mode; the protective shell is arranged in the mounting shell; the first stator winding is annularly arranged; the second stator winding is the same as the first stator winding in electromagnetic parameters and structural parameters and is arranged in the rotary drum through a second bearing, and a fixed magnetism-isolating sleeve is arranged between the first stator winding and the second stator winding; the rotary drum can be manually controlled to rotate to a specific angle in the mounting shell; the first rotor core and the second rotor core are identical in geometric shape and fixed on the outer surface of the rotating shaft, and a movable magnetic isolation sleeve is arranged between the first rotor core and the second rotor core; the first rotor core is arranged in the induction coil of the first stator winding, and the second rotor core is arranged in the induction coil of the second stator winding.
Further limiting, a spiral shallow groove is formed in the axial direction of the rotating shaft, and a bonding agent is coated on the outer surface of the spiral shallow groove; the first rotor iron core, the movable magnetic isolation sleeve and the second rotor iron core are arranged on the axial outer surface of the rotating shaft through spiral shallow grooves.
Further limiting, the first stator winding and the second stator winding are vertically placed on the inner wall of the protective shell, and the first stator winding and the second stator winding are isolated through a fixed magnetic isolation sleeve; the second stator winding is embedded in the rotary drum; the first stator winding is fixed in the protective shell; the second stator winding is rotatable with the drum to adjust its relative position with the first stator winding.
Further limiting, a signal wire through hole is formed in the fixed magnetic separation sleeve and used for penetrating through conducting wires of the first stator winding and the second stator winding; the center of the fixed magnetism isolating sleeve is also provided with a round hole, and the rotating shaft penetrates through the round hole.
Further limiting, the first rotor core and the second rotor core are symmetrically arranged up and down on the rotating shaft and are isolated from each other through a movable magnetic isolation sleeve.
Further limiting, the first rotor core, the second rotor core and the movable magnetic isolation sleeve are fixedly arranged on the rotating shaft; the first rotor core and the second rotor core are arranged in the inner rings of the first stator winding and the second stator winding together with the rotating shaft.
And further limiting, gluing soft magnetic alloy laminations for the first stator winding, the second stator winding, the first rotor core and the second rotor core, laminating the laminations into blank pieces, and cutting and processing finally needed teeth, grooves, holes and excircles.
Further limiting, a first bearing and a second bearing are placed at two ends of the rotating shaft, and the first bearing is nested on an inner hole of the protective shell and is positioned below the first stator winding; the second bearing is nested on the inner hole of the rotary drum and is positioned above the second stator winding.
Preferably, the dual-redundancy contactless transformer type angular displacement sensor further comprises a pressing ring arranged on one end face of the protective shell, and the pressing ring is used for unlocking or locking the rotation of the rotary drum; and fixing threaded holes matched with each other are formed in the rotary drum and the compression ring. .
Preferably, the dual-redundancy contactless transformer type angular displacement sensor further comprises a limiting ring arranged between the protective shell and the mounting shell, wherein the limiting ring is made of high-temperature-resistant elastic material and is mounted in an annular groove arranged on an excircle at the tail end of the protective shell; the limiting ring is used for fixing the protective shell and the mounting shell more tightly.
Compared with the prior art, the invention has the following advantages:
(1) the first stator winding 9 is fixed, and the second stator winding 7 can rotate along with the rotary drum 5 to adjust the relative position between the first stator winding 9 and the rotary drum, so that the output consistency of the two channels can be adjusted, and the output consistency error of the two channels can be effectively reduced. Compared with the prior art: in the adjustment mode that the first rotor core 13 is fixed and the second rotor core 15 rotates, the adjustment method of the invention has the following advantages: real-time online adjustment can be realized, and the efficiency of output consistency adjustment is greatly improved. The mode that prior art adjusted through rotor core must be taken rotor core out from stator core before adjusting, inserts after rotating 15 certain angles of second rotor core, consequently can't realize online adjustment, and inefficiency, process are loaded down with trivial details. In addition, repeated pulling and inserting operations easily rub the coils on the stator winding, causing damage.
(2) Reverse thinking changes the processing sequence of the traditional stator core and rotor core, obtains stator and rotor cores with orderly lamination and good structural symmetry, and effectively reduces the zero residual voltage of the product. When the stator core laminations are laminated, the rolling direction of each lamination is uniformly staggered at a certain angle on the circumference in a manner of rotating the laminations, so that the uniformity of the magnetic field intensity is improved, and the zero residual voltage is further reduced. The above measures can reduce the zero voltage of the sensor from about 10mV to within 1 mV.
(3) The fixed magnetic isolation sleeve 8 and the movable magnetic isolation sleeve 14 are respectively arranged between the two stator windings and between the two rotor cores so as to cut off a magnetic circuit between the two channels, thereby achieving a good magnetic isolation effect and effectively reducing the cross interference error between the two channels.
(4) The spiral shallow groove is processed in the axial direction of the rotating shaft 12 for coating the adhesive, so that the first rotor core 13, the movable magnetic isolation sleeve 14 and the second rotor core 15 can be fixed in a high-strength manner after being sequentially screwed into the rotating shaft 12. Compared with the prior art: the rotating shaft 12 is a smooth polished rod or only a plurality of annular grooves are processed and then coated with glue, the rotor iron core, the movable magnetic isolation sleeve 14 and the rotating shaft 12 are connected in a thread-like manner by the mode of the invention, and the rotor iron core and the movable magnetic isolation sleeve 14 can be obviously and effectively prevented from rotating along with the rotating in the use process.
(5) Through the interference fit of the front end step of the protective shell 2, the limiting ring 4 and the inner hole of the mounting shell 1, the protective shell 2 and the internal parts of the protective shell are fixed more tightly relative to the mounting shell 1, the vibration close to the tail end of the protective shell 2 is not amplified, and the vibration resistance is better. The method has important significance for improving the adaptability of the sensor in the airborne strong vibration environment.
(6) The invention overcomes the defects of poor output consistency, serious cross interference, low product precision, poor stability in a vibration environment, short service life and the like caused by the traditional structure, and has convenient processing, assembly and adjustment processes. The technical problem of the layout of the internal space structure of the dual-redundancy transformer type angular displacement sensor is solved, and the dual-redundancy transformer type angular displacement sensor plays an important role in meeting the requirements of high reliability and high precision of the dual-redundancy angular displacement sensor. In addition, the structure of the invention has larger universality, and is suitable for various transformer type angular displacement sensors with dual redundancy, such as linearity, sine and cosine and the like.
Drawings
FIG. 1 is a cross-sectional view of a dual-redundancy, non-contact, transformer-type angular displacement sensor in accordance with the present invention;
FIG. 2 is a cross-sectional view of an integrated rotor assembly according to the present invention;
FIG. 3 is a front view of a fixed magnetic spacer according to the present invention;
FIG. 4 is a cross-sectional view of a drum according to the present invention;
figure 5 is a front view of a pressure ring according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
In one embodiment of the invention, the invention relates to a dual-redundancy non-contact transformer type angular displacement sensor, which comprises a mounting shell 1, a protective shell 2, a first stator winding 9, a fixed magnetic isolation sleeve 8, a second stator winding 7, a rotary drum 5, a first bearing 10, a second bearing 6 and an integrated rotor assembly 11; the integrated rotor assembly 11 comprises a rotating shaft 12, a first rotor iron core 13, a movable magnetic isolation sleeve 14 and a second rotor iron core 15;
the first stator winding 9, the fixed magnetic isolation sleeve 8, the second stator winding 7, the rotary drum 5, the first bearing 10, the second bearing 6 and the integrated rotor assembly 11 are arranged in the protective shell 2; the protective shell 2 is arranged in the installation shell 1; the first stator winding 9 is annularly arranged; the second stator winding 7 has the same electromagnetic parameters and structural parameters as the first stator winding 9, and is arranged in the rotary drum 5 through the second bearing 6, and a fixed magnetic isolation sleeve 8 is arranged between the first stator winding 9 and the second stator winding 7; the rotary drum 5 can be installed in the shell 1 and manually controlled to rotate to a specific angle; the first rotor core 13 and the second rotor core 15 have the same geometric shape and are fixed on the outer surface of the rotating shaft 12, and a movable magnetic isolation sleeve 14 is arranged between the first rotor core 13 and the second rotor core 15; the first rotor core 13 is disposed in the induction coil of the first stator winding 9, and the second rotor core 15 is disposed in the induction coil of the second stator winding 7.
In one embodiment, the rotating shaft 12 is provided with a spiral shallow groove in the axial direction, and the outer surface of the spiral shallow groove is coated with an adhesive; the first rotor core 13, the movable magnetic isolation sleeve 14 and the second rotor core 15 are mounted on the axial outer surface of the rotating shaft 12 through spiral shallow grooves.
In one embodiment, the first stator winding 9 and the second stator winding 7 are placed on the inner wall of the protective shell 2 in an up-and-down manner, and the first stator winding 9 and the second stator winding 7 are isolated by a magnetic isolation sleeve 8; the second stator winding 7 is embedded in the rotary drum 5; the first stator winding 9 is fixed in the protective shell 2; the second stator winding 7 is rotatable with the drum 5 to adjust its relative position to the first stator winding 9.
In one embodiment, the fixed magnetic shield 8 is provided with a signal wire through hole, and the signal wire through hole is used for passing through the wires of the first stator winding 9 and the second stator winding 7; a round hole is further formed in the center of the fixed magnetic isolation sleeve 8, and the rotating shaft 12 penetrates through the round hole.
In one embodiment, the first rotor core 13 and the second rotor core 15 are symmetrically arranged up and down on the rotating shaft 12, and are separated by the movable magnetic isolation sleeve 14.
In one embodiment, the first rotor core 13, the second rotor core 15 and the movable magnetic shield 14 are fixed on the rotating shaft 12; the first and second rotor cores 13 and 15 are arranged in the inner rings of the first and second stator windings 9 and 7 together with the rotating shaft 12.
In one embodiment, the first stator winding 9, the second stator winding 7, the first rotor core 13 and the second rotor core 15 are all made of soft magnetic alloy laminations glued first, and after the soft magnetic alloy laminations are laminated into blank pieces, finally needed teeth, grooves, holes and outer circles are cut and processed.
In one embodiment, a first bearing 10 and a second bearing 6 are placed at two ends of the rotating shaft 12, and the first bearing 10 is nested on the inner hole of the protective shell 2 and is positioned below the first stator winding 9; the second bearing 6 is nested on the inner bore of the drum 5 and is located above the second stator winding 7.
In one embodiment, the dual-redundancy non-contact transformer type angular displacement sensor further comprises a pressing ring 3 arranged on one end face of the protective shell 2, and the pressing ring 3 is used for unlocking or locking the rotation of the rotary drum 5; and fixing threaded holes matched with each other are formed in the rotary drum 5 and the compression ring 3.
In one embodiment, the dual-redundancy contactless transformer type angular displacement sensor further comprises a limiting ring 4 arranged between the protective shell 2 and the mounting shell 1, wherein the limiting ring 4 is made of high-temperature-resistant elastic material and is mounted in an annular groove arranged on an excircle at the tail end of the protective shell 2; the limiting ring 4 is used for fixing the protection shell 2 and the installation shell 1 more tightly.
The invention will be explained in more detail with reference to the specific parameters and the use of the various components, etc.:
referring to fig. 1, it is a schematic structural diagram of a dual-redundancy contactless transformer type angular displacement sensor according to a preferred embodiment of the present invention. In this embodiment, the sensor mainly includes: the rotor comprises an installation shell 1, a protective shell 2, a first stator winding 9, a fixed magnetic isolation sleeve 8, a second stator winding 7, a rotary drum 5, a pressure ring 3, a limiting ring 4, a first bearing 10, a second bearing 6, an integrated rotor assembly 11 and the like. The integrated rotor assembly 11 further includes a rotating shaft 12, a first rotor core 13, a movable magnetic isolation sleeve 14, a second rotor core 15 and a bushing 16, as shown in fig. 2.
The first stator winding 9 and the second stator winding 7 are both composed of a stator core and an excitation coil and an induction coil wound on the stator core, and the electromagnetic parameters and the structural parameters of the two stator windings are completely the same. The stator core is annular, and more than four stator teeth are uniformly distributed on the inner wall of the stator core. According to different output signal requirements, different types of exciting coils and induction coils are wound on the stator teeth. The excitation coil is used for generating a varying magnetic field and the induction coil is used for generating an induced potential in functional relation to the relative angular position of the stator and rotor cores. The two types of coils are generally enameled wires with the wire diameter of about 0.1-0.2 mm. The first stator winding 9 and the second stator winding 7 are vertically placed on the inner wall of the protective shell 2 and are isolated from each other through the fixed magnetic isolation sleeve 8.
The structure of the fixed magnetic shield 8 is shown in fig. 3. Through holes L and J are formed in the stator winding, and signal output lines of the first stator winding 9 and the second stator winding 7 penetrate through the through holes. The center of the fixed magnetic isolation sleeve 8 is also provided with a round hole K for the integrated rotor combination 11 to pass through during assembly.
A rotary drum 5 is further arranged between the second stator winding 7 and the inner wall of the protective shell 2, namely the second stator winding 7 is embedded in the rotary drum 5 and then arranged on the inner wall of the protective shell 2. No relative movement with the drum 5 is ensured by applying adhesive at the position B of the second stator winding 7. During the two-channel output consistency adjustment, the first stator winding 9 is fixed in the protective shell 2, and the second stator winding 7 can rotate along with the rotary drum 5 to adjust the relative position between the first stator winding 9 and the second stator winding.
For the purpose of rotation adjustment, two blind holes M are provided in the drum 5, as shown in fig. 4. A tooling fixture may be used to clamp its two pins against blind holes M for screwing.
After the second stator winding 7 is adjusted in place to enable the outputs of the two channels to be consistent, the pressure ring 3 is screwed into the tail end of the protective shell 2 (similar to the nut action), and the rotary drum 5 is tightly pressed and fixed and cannot move in the axial direction and the radial direction. The pressing ring 3 is structured as shown in fig. 5, and the matching of the pressing ring and the tail end of the protective shell 2 is a thread O. For the sake of mounting, the drum 5 is likewise provided with two blind holes N. Meanwhile, in order to strengthen the fastening effect, 3 threaded through holes P are uniformly distributed on the circumference of the pressing ring 3 and used for screwing the slotted conical end fastening screws until the head of the screw is firmly pressed against the rotating cylinder 5.
The first stator winding 9, the second stator winding 7, the fixed magnetic isolation sleeve 8, the rotary drum 5, the pressure ring 3 and the protective shell 2 are coaxial in space. The integrated rotor assembly 11 is coaxially disposed in the inner ring of the above-mentioned components through the first bearing 10 and the second bearing 6, as shown in fig. 1. The method specifically comprises the following steps: a first bearing 10 and a second bearing 6 are respectively arranged at two ends F and I of a rotating shaft 12 of the integrated rotor assembly 11, and the first bearing 10 is nested on an inner hole E of the protective shell 2 and is positioned below the first stator winding 9; the second bearing 6 is nested on the inner bore C of the bowl 5 above the second stator winding 7.
The first rotor core 13 and the second rotor core 15 of the integrated rotor assembly 11 have identical geometries, and each rotor core may have one pair of poles (no teeth or slots on the rotor core) or multiple pairs of poles. The two rotor cores are symmetrically arranged up and down on the rotating shaft 12 and are isolated from each other by the movable magnetic isolation sleeve 14. And the first rotor core 13, the second rotor core 15 and the movable magnetic isolation sleeve 14 are fixed on the rotating shaft 12. The fixing mode of the three parts on the rotating shaft 12 is shown in the attached figure 2: firstly, a step G is arranged on a rotating shaft 12, and a spiral shallow groove (used for coating an adhesive) is processed in the range shown by an axial broken line frame H; then the first rotor iron core 13, the movable magnetic isolation sleeve 14 and the second rotor iron core 15 are sleeved into the rotating shaft 12 in sequence; finally, the bush 16 is pressed in, and the three are clamped and fixed between the step of the rotating shaft 12 and the bush 16 by using the adhesive on the spiral shallow groove. Compared with the prior art: the rotating shaft 12 is a smooth polished rod or is coated with glue after only a plurality of annular grooves are processed, the first rotor iron core 13, the movable magnetic isolation sleeve 14, the second rotor iron core 15 and the rotating shaft 12 are connected by similar threads in the mode of the invention, and the rotor iron core and the movable magnetic isolation sleeve 14 can be obviously and effectively prevented from rotating along with each other in the use process. During the rotation of the rotating shaft 12, equal air gaps or unequal air gaps may be formed between the first rotor core 13 and the second rotor core 15 and between the first stator winding 9 and the second stator winding 7.
The fixed magnetic isolation sleeve 8 and the movable magnetic isolation sleeve 14 are both made of high-permeability materials, have good magnetic isolation effect, and can effectively cut off a magnetic circuit between two channels, thereby effectively reducing the cross interference error between the two channels.
The stator core and the rotor core are respectively glued with soft magnetic alloy laminations (the thickness of each lamination is generally 0.2-0.3 mm), and after the laminations are laminated into blank pieces, the finally needed teeth, grooves, holes, excircles and the like are cut and processed by slow-speed wire feeding. The traditional processing mode is as follows: the stator core and the rotor core are both processed in place by soft magnetic alloy strips in one step to obtain a lamination in a final required shape, and then the plurality of laminations are laminated and molded by glue. Although the two processing methods only have different processing sequences, the effects are completely different, the stator iron core and the rotor iron core obtained by the two processing methods are orderly laminated, the structural symmetry is good, and the zero residual voltage of the product is effectively reduced. Due to thinking, people generally think that the laminated glue cannot conduct electricity and then cannot perform linear cutting after being bonded, and in order to solve the problem, the invention provides the method for polishing the surface of a blank after the blank is laminated until the upper end surface and the lower end surface of the blank are conducted, so that the subsequent linear cutting can be performed. Therefore, the processing method breaks through thinking fixation and reverse thinking, and has certain innovation. When the stator core lamination is laminated, the rolling directions of the laminations are uniformly staggered at a certain angle on the circumference in a manner of rotating the laminations. The specific method comprises the following steps: when the soft magnetic alloy lamination is fed, the mark is made, and when the soft magnetic alloy lamination is stacked, the mark position of the next lamination is staggered by a certain angle relative to the mark position of the previous lamination. The measure can improve the uniformity of the magnetic field intensity, thereby further reducing the zero residual voltage.
In order to improve the anti-vibration performance of the sensor and ensure the stable work of the sensor in a vibration environment, the tail end of the protective shell 2 is also provided with a limiting ring 4. The limiting ring 4 is made of high-temperature resistant elastic material and is placed in an annular groove formed in the outer circle of the tail end of the protective shell 2. The principle of enhancing the anti-vibration performance is as follows: as shown in fig. 1, the front end step of the protective shell 2 and the limit ring 4 are in interference fit with the inner hole a and the inner hole D of the mounting shell 1, so that the protective shell 2 and the internal parts thereof are more compactly fixed relative to the mounting shell 1, and the vibration close to the tail end of the protective shell 2 is not amplified. The method has important significance for improving the adaptability of the sensor in the airborne strong vibration environment.
Claims (9)
1. A dual-redundancy non-contact transformer type angular displacement sensor is characterized by comprising a mounting shell (1), a protective shell (2), a first stator winding (9), a fixed magnetic isolation sleeve (8), a second stator winding (7), a rotary drum (5), a first bearing (10), a second bearing (6) and an integrated rotor combination (11); the integrated rotor assembly (11) comprises a rotating shaft (12), a first rotor iron core (13), a movable magnetic isolation sleeve (14) and a second rotor iron core (15);
the first stator winding (9), the fixed magnetic isolation sleeve (8), the second stator winding (7), the rotary drum (5), the first bearing (10), the second bearing (6) and the integrated rotor assembly (11) are arranged in the protective shell (2); the protective shell (2) is arranged in the mounting shell (1); the first stator winding (9) is annular; the second stator winding (7) has the same electromagnetic parameters and structural parameters as the first stator winding (9), and is arranged in the rotary drum (5) through a second bearing (6), and a fixed magnetism-isolating sleeve (8) is arranged between the first stator winding (9) and the second stator winding (7); the rotary drum (5) can be manually controlled to rotate to a specific angle in the mounting shell (1); the first rotor core (13) and the second rotor core (15) are identical in geometric shape and fixed on the outer surface of the rotating shaft (12), and a movable magnetism isolating sleeve (14) is arranged between the first rotor core (13) and the second rotor core (15); the first rotor core (13) is arranged in an induction coil of the first stator winding (9), and the second rotor core (15) is arranged in an induction coil of the second stator winding (7);
the first stator winding (9) and the second stator winding (7) are vertically arranged on the inner wall of the protective shell (2), and the first stator winding (9) and the second stator winding (7) are isolated by a fixed magnetic isolation sleeve (8); the second stator winding (7) is embedded in the rotary drum (5); the first stator winding (9) is fixed in the protective shell (2); the second stator winding (7) can rotate with the rotary drum (5) to adjust the relative position between the second stator winding and the first stator winding (9).
2. The dual-redundancy contactless transformer type angular displacement sensor according to claim 1, wherein the shaft (12) is provided with a helical shallow groove in the axial direction, the outer surface of the helical shallow groove being coated with an adhesive; the first rotor core (13), the movable magnetic isolation sleeve (14) and the second rotor core (15) are arranged on the axial outer surface of the rotating shaft (12) through spiral shallow grooves.
3. The dual-redundancy contactless transformer type angular displacement sensor according to claim 1, wherein the fixed magnetic sleeve (8) is provided with a signal wire through hole for passing through the wires of the first stator winding (9) and the second stator winding (7); a round hole is further formed in the center of the fixed magnetic isolation sleeve (8), and the rotating shaft (12) penetrates through the round hole.
4. The dual-redundancy contactless transformer-type angular displacement sensor according to claim 1, wherein the first rotor core (13) and the second rotor core (15) are symmetrically placed up and down on the rotating shaft (12), and are separated by a movable magnetic isolation sleeve (14).
5. The dual-redundancy contactless transformer-type angular displacement sensor according to claim 1, characterized in that the first rotor core (13), the second rotor core (15) and the movable magnetic isolation sleeve (14) are fixed on the rotating shaft (12); the first rotor core (13) and the second rotor core (15) are arranged in the inner ring of the first stator winding (9) and the second stator winding (7) together with the rotating shaft (12).
6. The dual-redundancy non-contact transformer type angular displacement sensor according to claim 1, wherein the first stator winding (9), the second stator winding (7), the first rotor core (13) and the second rotor core (15) are all made of soft magnetic alloy laminations glued first, and after the laminations are laminated into blank pieces, finally required teeth, grooves, holes and excircles are cut and processed.
7. The dual-redundancy contactless transformer type angular displacement sensor according to claim 1, characterized in that the two ends of the rotating shaft (12) are placed with a first bearing (10) and a second bearing (6), the first bearing (10) is nested on the inner hole of the protective shell (2) and is located below the first stator winding (9); the second bearing (6) is nested on the inner hole of the rotary drum (5) and is positioned above the second stator winding (7).
8. The dual-redundancy contactless transformer type angular displacement sensor according to claim 1, further comprising a press ring (3) disposed on one end face of the protective housing (2), wherein the press ring (3) is used for locking the rotation of the drum (5); and fixing threaded holes matched with each other are formed in the rotary drum (5) and the compression ring (3).
9. The dual-redundancy contactless transformer type angular displacement sensor according to claim 1, further comprising a limiting ring (4) disposed between the protection casing (2) and the mounting casing (1), wherein the limiting ring (4) is made of high temperature resistant elastic material and is mounted in an annular groove disposed at an outer circle of a terminal end of the protection casing (2); the limiting ring (4) is used for fixing the protection shell (2) and the installation shell (1) more tightly.
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| CN201911200528.2A CN110986753B (en) | 2019-11-29 | 2019-11-29 | Double-redundancy non-contact transformer type angular displacement sensor |
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| CN201911200528.2A CN110986753B (en) | 2019-11-29 | 2019-11-29 | Double-redundancy non-contact transformer type angular displacement sensor |
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| CN110986753B true CN110986753B (en) | 2021-08-20 |
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| CN112687460B (en) * | 2020-12-21 | 2022-09-16 | 苏州长风航空电子有限公司 | RVDT angular displacement sensor with adjustable sensitivity |
| CN112729209B (en) * | 2020-12-24 | 2022-07-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Positioning ring fixing structure of dual-redundancy angular displacement sensor |
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| CN114198363B (en) * | 2021-12-14 | 2023-07-11 | 苏州长风航空电子有限公司 | Dissimilar redundancy pressure sensor and aircraft hydraulic system |
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