CN113790664A - Linear displacement sensor and rotor assembly thereof - Google Patents
Linear displacement sensor and rotor assembly thereof Download PDFInfo
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- CN113790664A CN113790664A CN202111033594.2A CN202111033594A CN113790664A CN 113790664 A CN113790664 A CN 113790664A CN 202111033594 A CN202111033594 A CN 202111033594A CN 113790664 A CN113790664 A CN 113790664A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 39
- 238000009434 installation Methods 0.000 claims abstract description 63
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- 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
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention discloses a rotor assembly of a linear displacement sensor and the linear displacement sensor, which have better applicability and convenience in installation. Wherein the active cell subassembly includes: the magnetic core comprises a magnetic core seat body, a moving rod, a magnetic core piece, two angle-joint bearings and a bearing inner end cover, wherein the moving rod is provided with a first installation operation part, one end of the moving rod is provided with a second installation operation part, and the other end of the moving rod is provided with a connecting part; the inner end cover of the bearing is in threaded connection with one end of the moving rod, which is provided with a second installation operation part, the two angle-connected bearings are installed back to back on the moving rod and are positioned between the inner end cover of the bearing and the first installation operation part, and the connecting part on the moving rod is fixedly connected with the position to be installed by operating the first installation operation part or the second installation operation part; one end of the magnetic core seat body is relatively fixed with the outer ring of the angle joint bearing, the other end of the magnetic core seat body is provided with a magnetic core piece, and one end of the magnetic core seat body, which is provided with the magnetic core piece, is provided with an avoiding part communicated with the second installation operation part.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a rotor assembly of a linear displacement sensor and the linear displacement sensor.
Background
The dual-redundancy linear displacement sensor is commonly used in an electric transmission flight control system and an engine system of an aviation aircraft, and the dual-redundancy linear displacement sensor is designed to start another group of standby windings to work under the condition that one group of winding coils fails, so that the normal performance output of the sensor is ensured. As shown in fig. 1, the dual-redundancy linear displacement sensor mainly includes a mover assembly and a stator assembly, the mover assembly is an important structure for realizing functions of the sensor, the mover assembly mainly includes a magnetic core base 01, a moving rod 02, an angular contact bearing 03, a bearing outer end cover 04, a bearing inner end cover 05, a screw 06, a magnetic core assembly 07, an anti-backlash washer 08, and the like, as shown in fig. 2, the moving rod 02 is installed at one end of the magnetic core base 01, the magnetic core assembly 07 is installed at the other end, and a connecting thread 021 is arranged at one end of the moving rod 02 far away from the magnetic core base 01. As shown in fig. 3, the bearing outer end cap 04 is fixedly connected to the moving rod 02 by a screw 06 to fix the outer ring of the angular contact bearing 03 to the moving rod 02.
The installation of present movable part subassembly is mainly fixed with the position of waiting to install through connecting screw 021 on the carriage release lever 02, mainly through the outer hexagon 022 that is equipped with on the rotatory carriage release lever 02 during the installation, in order to rotate connecting screw 021 on the carriage release lever 02 into rather than the complex threaded hole, outer hexagon 022 is located the one side that magnetic core pedestal 01 kept away from magnetic core subassembly 07 of installing on it, only can keep away from the one side operation of magnetic core subassembly 07 of installing on it at magnetic core pedestal 01 during the operation promptly, the operation mode is more single, when waiting that the position of installing is deep cavity hole or blind hole, then unable installation or installation are more difficult, installation application scope is narrower.
Disclosure of Invention
As described above, when the mover assembly and the to-be-mounted position are fixed, the mounting can be achieved only on one side of the magnetic core base body far away from the magnetic core assembly mounted thereon by operating the external hexagon, the operation mode is single, when the to-be-mounted position is a deep cavity hole or a blind hole, the mounting cannot be performed or is difficult, and the mounting application range is narrow.
In order to solve the problems in the prior art, the invention provides a mover assembly of a linear displacement sensor, comprising: a magnetic core seat body, a moving rod, a magnetic core piece, two angle joint bearings and a bearing inner end cover, wherein,
the movable rod is provided with a first installation operation part, one end of the movable rod is provided with a second installation operation part, and the other end of the movable rod is provided with a connecting part;
the inner end cover of the bearing is in threaded connection with one end of the moving rod, which is provided with a second installation operation part, the two angle-connected bearings are installed back to back on the moving rod and are positioned between the inner end cover of the bearing and the first installation operation part, and the first installation operation part or the second installation operation part is operated to fixedly connect the connecting part on the moving rod with a position to be installed;
one end of the magnetic core seat body is relatively fixed with the outer ring of the angle joint bearing, the other end of the magnetic core seat body is provided with the magnetic core piece, and one end of the magnetic core seat body, which is provided with the magnetic core piece, is provided with an avoiding part communicated with the second installation operation part.
In some optional embodiments, the mover assembly of the linear displacement sensor further includes: a bearing outer end cover;
the magnetic core seat body is provided with a mounting groove, the bottom of the mounting groove is provided with the avoiding part, the part of the moving rod, which is provided with the bearing inner end cover and the angle-connection bearing, is positioned in the mounting groove, and one side of the bottom of the mounting groove, which is far away from the first mounting operation part, is provided with the magnetic core piece;
the bearing outer end cover is fixedly connected with the magnetic core base body and used for limiting the bearing inner end cover and the angle joint bearing in the mounting groove, so that one end of the magnetic core base body is relatively fixed with the outer ring of the angle joint bearing.
In some alternative embodiments, the magnetic core housing comprises: the magnetic core connecting structure comprises a first connecting seat and a second connecting seat connected with one end of the first connecting seat, wherein the second connecting seat is provided with external threads and a through groove, the first connecting seat is provided with a groove communicated with the through groove, the groove and the through groove form the mounting groove, and the outer end cover of the bearing is fixedly connected with the magnetic core seat body through the external threads arranged on the second connecting seat.
In some optional embodiments, the core holder is provided with a threaded hole, and the core piece is provided with a thread, and the core piece is in threaded connection with the threaded hole.
In some optional embodiments, the first mounting operation part includes: a first sub-operation part provided between the corner joint bearing and the connection part; and/or the presence of a gas in the gas,
and the second sub-operation part is arranged at one end of the movable rod, which is provided with the connecting part.
In some optional embodiments, a first shoulder is provided on the moving rod, and the first shoulder is located on a side of the angular joint bearing away from the bearing inner end cover.
In some optional embodiments, a plurality of second shoulders are arranged on the moving rod, and are distributed between the angle joint bearing and the connecting part at intervals along the length direction of the moving rod, and a sealing ring groove is arranged between the second shoulders and the moving shaft.
In some alternative embodiments, the connection is a thread; and/or the like and/or,
the first sub-operation part is of an outer hexagonal structure; and/or the like and/or,
the second mounting operation part is an operation hole; and/or the like and/or,
the second sub-operation part is an operation hole.
In some alternative embodiments, the second mounting operation portion is an internal hexagonal hole; and/or the like and/or,
the second sub-operation part is an inner hexagonal hole.
The invention also provides a linear displacement sensor which comprises a stator assembly and any one of the stator assemblies.
Compared with the prior art, the invention has the following technical effects:
1. the first installation operation part and the second installation operation part are arranged, so that the application range of installation operation is widened, and a proper installation operation mode can be selected for different installation positions, so that the installation operation device has better applicability and installation convenience;
2. through the installation design of the back-to-back angle joint bearings, the bearing configuration with relatively high rigidity is provided, the angle joint bearings can bear overturning moment, and the service life of the rotor assembly is prolonged;
3. the inner ring of the angle joint bearing is connected with the moving rod, and the outer ring and the magnetic core piece are relatively fixed, so that the design that the inner ring of the angle joint bearing is fixed and the outer ring is fixed is changed into the design that the inner ring of the angle joint bearing is fixed and the inner ring rotates, and the integral stability of the sensor is better;
4. through bearing outer end cover and magnetic core pedestal threaded connection, can increase the diameter of the mounting groove that sets up in the magnetic core pedestal, under the prerequisite that external dimensions is the same, relative prior art increases the bearing size in the active cell subassembly to improve mechanical properties, increase the reliability of active cell subassembly.
5. Through the second installation operation part, the first sub operation part and the second sub operation part, the installation practicability of the mover assembly is further improved.
Drawings
The drawings listed in the invention are only for better understanding of the technical solution and advantages of the invention, and do not constitute any limitation to the technical solution of the invention. Wherein:
FIG. 1 is an exploded view of a prior art mover assembly;
fig. 2 is a schematic perspective view of a mover assembly in the prior art;
FIG. 3 is a partial cross-sectional view of a prior art mover assembly;
FIG. 4 is an equivalent circuit of a linear displacement sensor provided by the present invention;
FIG. 5 is a graph of output characteristics provided by the present invention;
FIG. 6 is a cross-sectional view of a mover assembly provided by the present invention;
FIG. 7 is a partial cross-sectional view of a mover assembly provided by the present invention;
FIG. 8 is an exploded view of the inner race fixing structure of the angular contact bearing provided by the present invention;
FIG. 9 is a view of the inner race of the angular contact bearing according to the present invention;
FIG. 10 is a fixed exploded view of the outer race of the angle joint bearing provided by the present invention;
FIG. 11 is a view of the present invention providing a fixed assembly of the outer race of the angle joint bearing;
FIG. 12 is an exploded view of the magnetic core assembly provided by the present invention;
FIG. 13 is a schematic view of a core piece provided by the present invention;
FIG. 14 is a schematic structural view of a linear displacement sensor provided in the present invention;
fig. 15 is an exploded view of a stator assembly provided by the present invention.
Wherein:
01-magnetic core seat body 02-moving rod 021-connecting thread 022-outer hexagonal 03-angular contact bearing 04-bearing outer end cover 05-bearing inner end cover 06-screw 07-magnetic core assembly 08-anti-backlash washer
1-magnetic core seat body 11-avoidance part 12-mounting groove 13-first connecting seat 131-groove 14-second connecting seat 141-external thread 142-through groove 15-threaded hole 16-first shoulder 17-second shoulder 18-seal ring groove 2-moving rod 21-first mounting operation part 211-first sub operation part 212-second sub operation part 22-second mounting operation part 23-connecting part 3-magnetic core piece 31-moving rod 32-magnetic core 33-plug 4-angle joint bearing 5-bearing inner end cover 6-bearing outer end cover 100-mover assembly 200-stator assembly 201-shell 202-coil assembly 203-stop pressing piece 204-grounding gasket 205-stop pressing ring 206-rear end cover 207-outgoing line 208-heat shrink tube.
Detailed Description
The present invention will be described in more detail and fully hereinafter with reference to specific examples. The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.
Taking a linear differential transformer type displacement sensor as an example, the principle of the linear sensor is simply explained, and the linear differential transformer type displacement sensor is an inductive sensor which converts mechanical displacement change of non-electric quantity into electric parameter change in proportion to the mechanical displacement change. When the parasitic capacitance of the coil and the core loss are ignored, the equivalent circuit of the linear displacement sensor is shown in the figure 4.
Wherein in FIG. 4: e.g. of the type1Energizing a voltage for the primary coil; l is1、R1Primary coil inductance and resistance respectively; l is21、L22Two secondary coil inductors respectively; m1、M2Primary and two secondary coils are mutually inducted respectively; r21、R22Two secondary coil resistances, respectively.
In the measuring range and under the condition of open circuit of the load, according to the output potential calculation formula of the linear displacement sensor, the characteristic of the relationship between the output potential and the displacement of the magnetic core can be expressed as shown in fig. 5.
Wherein in FIG. 5: e.g. of the type21、e22Outputting potentials for the two secondary coils; e.g. of the type2Outputting the potential for differential; x is the distance of the core from the center position.
As shown in fig. 6 and 7, the present invention provides a mover assembly of a linear displacement sensor, including: a magnetic core seat body 1, a moving rod 2, a magnetic core piece 3, two angle joint bearings 4 and a bearing inner end cover 5, wherein,
a first installation operation part 21 is arranged on the movable rod 2, a second installation operation part 22 is arranged at one end of the movable rod 2, and a connecting part 23 is arranged at the other end of the movable rod;
the inner end cover 5 of the bearing is in threaded connection with one end of the moving rod 2 provided with a second installation operation part 22, the two angle-connected bearings 4 are installed back to back on the moving rod 2 and are positioned between the inner end cover 5 of the bearing and the first installation operation part 21, and the connecting part on the moving rod 2 is fixedly connected with the position to be installed by operating the first installation operation part 21 or the second installation operation part 22;
one end of the magnetic core base body 1 is relatively fixed with the outer ring of the angle joint bearing 4, the other end of the magnetic core base body 1 is provided with the magnetic core piece 3, and one end of the magnetic core base body 1 provided with the magnetic core piece 3 is provided with an avoiding part 11 communicated with the second installation operation part 22.
According to the mover assembly provided by the invention, the application range of installation operation and the convenience of installation operation are improved through the arranged first installation operation part 21 and the second installation operation part 22, and a proper installation operation mode can be selected for different installation positions; through the installation design of the back-to-back angle joint bearings 4, the bearing configuration with relatively high rigidity is provided, the angle joint bearings 4 can bear overturning moment, and the service life of the rotor assembly is prolonged; the inner ring of the angle joint bearing 4 is connected with the moving rod 2, the outer ring and the magnetic core piece 3 are relatively fixed, the design that the inner ring of the angle joint bearing 4 does not move and the outer ring moves in the past is changed into the design that the outer ring does not move and the inner ring rotates, so that the integral stability of the sensor is better. The convenience in the operation of the second mounting operation portion 22 is improved by the design of the escape portion 11.
The sensor rotor component can rotate along with the valve core fixedly connected with the sensor rotor component according to use requirements. Because the rotor assembly of the sensor is limited by the stator assembly and can only do axial movement but can not rotate, the difficulty of product design is how to reject the rotation of the rotor assembly under the condition of not influencing the axial movement of the rotor assembly.
A group of angle joint bearings which are installed back to back are fixed inside the rotor assembly, and rotation of the movable rod 2 relative to the magnetic core base body is achieved through rotation of the angle joint bearings, so that rotation of the rotor assembly is eliminated.
The angular contact bearing can bear radial load and axial load at the same time, can bear pure axial load, and has higher limit rotating speed. The bearings which are assembled and installed in different configurations are divided into the following parts according to the combination mode of different end surfaces of the outer ring: back-to-back configuration, face-to-face configuration, series configuration, configuration combination mounting manner. The three combinations were analyzed and compared as follows.
1) Back-to-back configuration
The bearings are assembled back-to-back with the load lines axially spaced along the bearings. Axial loads acting in both directions can be borne, but loads in each direction can only be borne by one bearing. The back-to-back arrangement of the assembled bearings provides a relatively stiff bearing arrangement and can withstand overturning moments.
2) Face-to-face arrangement
The bearings are assembled in a face-to-face configuration with load lines converging in the axial direction of the bearings. Axial loads acting in both directions can be borne, but loads in each direction can only be borne by one bearing. Compared with the back-to-back configuration and combination mounting mode, the configuration and combination mounting mode has lower rigidity and is not suitable for bearing overturning moment, and the bearing set can bear bidirectional axial load.
3) Series arrangement
The bearings are arranged in series in a combined installation mode, and load lines are parallel along the axial direction of the bearings. The radial load and the axial load are uniformly shared by the bearings, three or more bearings can be connected in series at the same support, but the bearing group can only bear the axial load acting in one direction. If axial loads are applied in opposite directions, or there are combined loads, a third adjustment bearing must be added to the combined mounting bearing in the opposite series configuration. In general, in order to balance and limit the axial displacement of the shaft, a bearing capable of bearing axial load in the other direction is arranged at the other support.
In summary, the rotor assemblies of the linear displacement sensor are all cantilever beam mounting structures, so that the inner bearings bear certain overturning moment, and the bearings of the rotor assemblies provided by the invention are arranged back to back, so that the angular joint bearings 4 can bear the overturning moment, and the service life of the rotor assemblies is prolonged.
The specific structures of the first installation operation portion 21 and the second installation operation portion 22 may be various, and may be holes or protrusions, and are configured to be adapted to the operation tool matched with the first installation operation portion 21, the first installation operation portion 21 and the moving rod 2 are integrally formed or separated, the second installation operation portion 22 and the moving rod 2 are integrally formed or separated, and the avoiding portion 11 is also correspondingly designed to be a structure convenient for the operation of the operation tool, for example: through holes, through slots, etc. The connecting portion 23 may be a connecting thread, a connecting buckle, etc., and will not be described in detail herein.
As shown in fig. 8 to 10, the mover assembly of the linear displacement sensor further includes: a bearing outer end cover 6;
a mounting groove 12 is arranged on the magnetic core seat body 1, an avoiding part 11 is arranged at the bottom of the mounting groove 12, the part of the movable rod 2, which is provided with the bearing inner end cover 5 and the angle-joint bearing 4, is positioned in the mounting groove 12, and a magnetic core piece 3 is arranged at one side of the bottom of the mounting groove 12, which is far away from the first mounting operation part 21;
the outer end cover 6 of the bearing is fixedly connected with the magnetic core base body 1 and is used for limiting the inner end cover 5 of the bearing and the angle joint bearing 4 in the mounting groove 12, so that one end of the magnetic core base body 1 is relatively fixed with the outer ring of the angle joint bearing 4.
During assembly, two angle joint bearings are arranged on the moving rod 2 back to back, the bearing inner end cover 5 is screwed at the thread of the moving rod 2 through the threads, the assembled structure is shown as fig. 9, the moving rod 2 assembled with the angle joint bearing 4 and the bearing inner end cover 5 is placed in the mounting groove 12 of the magnetic core seat body 1, the outer ring of the angle joint bearing 4 is fixed through the fixed connection of the bearing outer end cover 6 and the magnetic core seat body 1, and the mounted structure is shown as fig. 11. The outer end cover 6 of the bearing is connected with the magnetic core seat body 1, so that the outer ring of the angle joint bearing 4 can be conveniently and fixedly connected with the magnetic core piece 3, the connecting structure is simple, and the operation is convenient.
There are various connection manners of the magnetic core holder body 1 and the outer end cover 6 of the bearing, which may be a screw connection or a snap connection, and in a preferred embodiment of the present invention, as shown in fig. 10 and 11, the magnetic core holder body 1 includes: first connecting seat 13 and second connecting seat 14 that is connected with the one end of first connecting seat 13, second connecting seat 14 is equipped with external screw thread 141 and logical groove 142, first connecting seat 13 is equipped with the recess 131 with logical groove 142 intercommunication, recess 131 and logical groove 142 form mounting groove 12, outer end cover 6 of bearing and magnetic core pedestal 1 are through the external screw thread 141 fixed connection that second connecting seat 14 was equipped with.
For buckle or screwed connection, the outer end cover 6 of bearing and the 1 threaded connection of magnetic core pedestal can save the space that screw or buckle occupy, and the diameter of the mounting groove 12 that sets up in the increase magnetic core pedestal 1 can increase the size of angle joint bearing 4 in the active cell subassembly under the prerequisite that outside size is the same to improve mechanical properties, increase active cell subassembly's reliability.
The core piece 3 and the core base 1 can be connected in various ways, for example: in an alternative embodiment of the present invention, as shown in fig. 12, the magnetic core base 1 is provided with a threaded hole 15, the magnetic core 3 is provided with a thread, and the magnetic core 3 is in threaded connection with the threaded hole 15. The threaded connection facilitates the disassembly and assembly of the core piece 3 and the core base 1.
As shown in fig. 13, the magnetic core member 3 provided by the present invention is composed of 1 connecting rod 31, 1 magnetic core 32, and 1 magnetic core 32 plug 33. The present invention provides a mover assembly including two core pieces 3.
In an alternative embodiment of the present invention, the first mounting operation unit 21 includes: and a first sub-operation part 211, wherein the first sub-operation part 211 is arranged between the angle bearing 4 and the connecting part 23.
In another alternative embodiment provided by the present invention, the first mounting operation portion 21 includes: and a second sub-operation part 212, the second sub-operation part 212 being provided at one end of the travel bar 2 at which the connection part 23 is provided.
In still another alternative embodiment of the present invention, the first mounting operation portion 21 includes: a first sub-operation part 211 and a second sub-operation part 212, wherein the first sub-operation part 211 is arranged between the angle joint bearing 4 and the connecting part, and the second sub-operation part 212 is arranged at one end of the moving rod 24 provided with the connecting part 23.
In some alternative embodiments, as shown in fig. 6, the moving rod 2 is provided with a first shoulder 16, and the first shoulder 16 is located on the side of the angle bearing 4 away from the bearing inner end cap 5. The provision of the first shoulder 16 facilitates the spacing of the angular contact bearing 4.
As shown in fig. 8, the moving rod 2 is provided with a plurality of second shoulders 17, the plurality of second shoulders 17 are spaced apart from each other along the length direction of the moving rod 2 between the angular bearings 4 and the connecting portion, and a seal ring groove 18 is formed between the second shoulders 17 and the moving shaft. The sealing ring groove 18 is convenient for installing the sealing ring, and improves the sealing property.
In an alternative embodiment provided by the present invention, the connection is a thread; and/or the like and/or,
the first sub-operation portion 211 has an outer hexagonal structure; and/or the like and/or,
the second mounting operation portion 22 is an operation hole; and/or the like and/or,
the second sub-operation portion 212 is an operation hole. The above structure may be one or a combination of a plurality of structures, and thus, the description is omitted.
The operation holes may be circular holes, square holes, pentagonal holes, etc., and are not described herein any more, and in an alternative embodiment provided by the present invention, the second installation operation portion 22 is an inner hexagonal hole; and/or the like and/or,
the second sub-operation portion 212 is an inner hexagonal hole. That is, in one embodiment, the second mounting operation portion 22 is an internal hexagonal hole; the second sub-operation portion 212 is a hole of another shape; in another embodiment, the second mounting operation portion 22 is a hole having another shape; the second sub-operation portion 212 is an inner hexagonal hole; in yet another embodiment, the second mounting operation part 22 and the second sub operation part 212 are both internal hexagonal holes.
The outer hexagonal structure on the movable rod 2 is suitable for screwing the rotor assembly into an installation part through threads by using a common open-end wrench when the installation operation space is large; the second sub-operation part 212 on the moving rod 2 is suitable for screwing the mover assembly into the installation position through threads by using an inner hexagonal wrench when the installation space is narrow; the second mounting operation portion 22 of the movable rod 2 is suitable for general deep blind hole mounting, and when the mounting space is narrow, the mover assembly can be screwed into the mounting portion by using an internal hexagonal wrench. Therefore, the rotor assembly provided by the invention can be suitable for various installation spaces.
As shown in fig. 14, the present invention further provides a linear displacement sensor, which includes a stator assembly 200 and the mover assembly 100 as described in any one of the above. The linear displacement sensor provided by the invention has better applicability and longer service life.
The embodiment of the invention takes a dual-redundancy linear displacement sensor as an example for explanation, but the improvement point of the invention is not limited to be used for the sensor, the dual-redundancy linear displacement sensor structurally comprises a stator component and a rotor component, each sensor is provided with two coil components and two magnetic core 32 components, and a set of shell and a moving rod 2 are shared.
As shown in fig. 15, the sensor stator assembly is composed of 1 casing 201, 2 coil assemblies 202, 1 stopper pressing piece 203, 1 grounding gasket 204, 1 stopper pressing ring 205, 1 rear end cap 206, 2 lead-out wires 207 and heat shrink tube 208. In order to ensure the sealing performance and the strength, the stator assembly is welded into a sealing whole through laser welding.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A mover assembly of a linear displacement sensor, comprising: a magnetic core seat body, a moving rod, a magnetic core piece, two angle joint bearings and a bearing inner end cover, wherein,
the movable rod is provided with a first installation operation part, one end of the movable rod is provided with a second installation operation part, and the other end of the movable rod is provided with a connecting part;
the inner end cover of the bearing is in threaded connection with one end of the moving rod, which is provided with a second installation operation part, the two angle-connected bearings are installed back to back on the moving rod and are positioned between the inner end cover of the bearing and the first installation operation part, and the first installation operation part or the second installation operation part is operated to fixedly connect the connecting part on the moving rod with a position to be installed;
one end of the magnetic core seat body is relatively fixed with the outer ring of the angle joint bearing, the other end of the magnetic core seat body is provided with the magnetic core piece, and one end of the magnetic core seat body, which is provided with the magnetic core piece, is provided with an avoiding part communicated with the second installation operation part.
2. The mover assembly of a linear displacement sensor according to claim 1, further comprising: a bearing outer end cover;
the magnetic core seat body is provided with a mounting groove, the bottom of the mounting groove is provided with the avoiding part, the part of the moving rod, which is provided with the bearing inner end cover and the angle-connection bearing, is positioned in the mounting groove, and one side of the bottom of the mounting groove, which is far away from the first mounting operation part, is provided with the magnetic core piece;
the bearing outer end cover is fixedly connected with the magnetic core base body and used for limiting the bearing inner end cover and the angle joint bearing in the mounting groove, so that one end of the magnetic core base body is relatively fixed with the outer ring of the angle joint bearing.
3. The mover assembly of a linear displacement sensor of claim 2, wherein the core mount comprises: the magnetic core connecting structure comprises a first connecting seat and a second connecting seat connected with one end of the first connecting seat, wherein the second connecting seat is provided with external threads and a through groove, the first connecting seat is provided with a groove communicated with the through groove, the groove and the through groove form the mounting groove, and the outer end cover of the bearing is fixedly connected with the magnetic core seat body through the external threads arranged on the second connecting seat.
4. A mover assembly of a linear displacement sensor according to claim 2, wherein said core housing is provided with a threaded hole, said core piece is provided with a thread, and said core piece is threadedly connected to said threaded hole.
5. A mover assembly of a linear displacement sensor according to any of claims 1-4, wherein the first mounting operation portion comprises: a first sub-operation part provided between the corner joint bearing and the connection part; and/or the presence of a gas in the gas,
and the second sub-operation part is arranged at one end of the movable rod, which is provided with the connecting part.
6. A mover assembly for a linear displacement sensor according to claim 1, wherein said movable rod is provided with a first shoulder, and said first shoulder is located on a side of said angular contact bearing away from said inner end cap of said bearing.
7. The mover assembly of a linear displacement sensor according to claim 1, wherein a plurality of second shoulders are disposed on the movable rod, and are spaced apart from each other along a length direction of the movable rod between the angular bearings and the connecting portion, and a seal groove is disposed between the second shoulders and the movable rod.
8. A mover assembly of a linear displacement sensor according to claim 5, wherein said connecting portion is a thread; and/or the like and/or,
the first sub-operation part is of an outer hexagonal structure; and/or the like and/or,
the second mounting operation part is an operation hole; and/or the like and/or,
the second sub-operation part is an operation hole.
9. The linear displacement sensor mover assembly of claim 8, wherein the second mounting operation portion is an internal hexagonal hole; and/or the like and/or,
the second sub-operation part is an inner hexagonal hole.
10. A linear displacement transducer comprising a stator assembly and a mover assembly as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111033594.2A CN113790664A (en) | 2021-09-03 | 2021-09-03 | Linear displacement sensor and rotor assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111033594.2A CN113790664A (en) | 2021-09-03 | 2021-09-03 | Linear displacement sensor and rotor assembly thereof |
Publications (1)
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| JP2002267550A (en) * | 2001-03-09 | 2002-09-18 | Koyo Seiko Co Ltd | Torque detecting device and steering device |
| CN101968338A (en) * | 2010-09-14 | 2011-02-09 | 国营北京曙光电机厂 | LVDT active cell assembly |
| CN102853755A (en) * | 2012-09-29 | 2013-01-02 | 钟胜 | Absolute measurement linear micrometer produced by adopting capacitance sensor |
| CN106787412A (en) * | 2016-11-15 | 2017-05-31 | 北京精密机电控制设备研究所 | A kind of highly integrated formula electromechanical actuator of integrated design |
| CN107525460A (en) * | 2017-09-08 | 2017-12-29 | 武汉中航传感技术有限责任公司 | A kind of redundance LVDT mover assemblies and device |
| CN111140592A (en) * | 2019-12-25 | 2020-05-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Mechanical anti-twisting device of dual-redundancy linear displacement sensor |
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2021
- 2021-09-03 CN CN202111033594.2A patent/CN113790664A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002267550A (en) * | 2001-03-09 | 2002-09-18 | Koyo Seiko Co Ltd | Torque detecting device and steering device |
| CN101968338A (en) * | 2010-09-14 | 2011-02-09 | 国营北京曙光电机厂 | LVDT active cell assembly |
| CN102853755A (en) * | 2012-09-29 | 2013-01-02 | 钟胜 | Absolute measurement linear micrometer produced by adopting capacitance sensor |
| CN106787412A (en) * | 2016-11-15 | 2017-05-31 | 北京精密机电控制设备研究所 | A kind of highly integrated formula electromechanical actuator of integrated design |
| CN107525460A (en) * | 2017-09-08 | 2017-12-29 | 武汉中航传感技术有限责任公司 | A kind of redundance LVDT mover assemblies and device |
| CN111140592A (en) * | 2019-12-25 | 2020-05-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Mechanical anti-twisting device of dual-redundancy linear displacement sensor |
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