CN107525460A - A kind of redundance LVDT mover assemblies and device - Google Patents
A kind of redundance LVDT mover assemblies and device Download PDFInfo
- Publication number
- CN107525460A CN107525460A CN201710807281.5A CN201710807281A CN107525460A CN 107525460 A CN107525460 A CN 107525460A CN 201710807281 A CN201710807281 A CN 201710807281A CN 107525460 A CN107525460 A CN 107525460A
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- Prior art keywords
- adapter
- ball bearing
- angular contact
- contact ball
- blind hole
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- 230000000712 assembly Effects 0.000 title claims abstract description 19
- 238000000429 assembly Methods 0.000 title claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 210000004907 gland Anatomy 0.000 claims abstract description 23
- 238000012856 packing Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The present invention, which provides a kind of redundance LVDT mover assemblies and device, the mover assembly, includes iron core and adapter, and the iron core is fixed on one end of adapter；Also include connecting shaft and angular contact ball bearing, the inner ring of the angular contact ball bearing is fixed in the connecting shaft, the other end of the adapter is provided with blind hole and gland, bulge loop is provided with the blind hole, the side of the outer shroud of the angular contact ball bearing abuts the bulge loop, opposite side is compressed by gland, and the outer shroud of the angular contact ball bearing is fixed on the adapter, makes adapter and rotatable described in the connection axis connection.By the way that adapter and iron core are directly connected to, blind hole is provided with adapter side, is rotatablely connected adapter and a connecting seat by angular contact ball bearing, by connecting shaft as rotary part, the process of many dismounting adjustment is eliminated, simplifies installation effectiveness；Solve the problems, such as that mover assembly length dimension is big, be unsatisfactory for the lightweight of aerospace field part, small form factor requirements.
Description
Technical field
The present invention relates to field of aerospace technology, more particularly, to a kind of redundance LVDT mover assemblies and device.
Background technology
LVDT (Linear Variable Differential Transformer, linear variable difference transformer) is straight
Linear movement pick-up, operation principle are briefly the movable transformers of iron core, and it is by a primary coil, two secondary coils,
The parts such as iron core, coil rack, shell form.Primary coil, secondary coil are distributed on coil rack, and coil inside has one
The rod core that can move freely.When iron core is in an intermediate position, induced electromotive force caused by two secondary coils is equal, this
Sample output voltage is zero；When iron core is mobile in coil inside and during off-center position, induced electromotive force caused by two coils
, have voltage output, its voltage swing depends on the size of displacement.In order to improve the sensitivity of sensor, improve sensing
The linearity of device, the range of linearity for increasing sensor, two coils are played a reversed role during design connect, the voltage pole of two secondary coils
Property on the contrary, LVDT output voltage be two secondary coils difference in voltage, this output magnitude of voltage and iron core displacement
It is linear.
As message digit technology high-speed develops, digital newspaper industry technology is also widely applied, closed in systems
Using LVDT formulas displacement transducer as feedback element, due to the raising of product reliability, traditional Dan Yu in ring control loop
Degree LVDT formulas displacement transducer can not meet the requirement of system high reliability.
Application publication number is " a kind of CN 101968338A " LVDT mover assemblies of Chinese invention patent, disclose one kind
The improved structure of LVDT mover assemblies, as shown in figure 1, including connector 1 and two cylinder-shaped iron cores 2, by connector 1
There is an annular boss 1a in connecting shaft, in connector right side Shang You centers tapped blind hole 1b；Two angular contact ball bearing peaces
In the connecting shaft of connector 1, the right side of trip bolt 8 and the compression of pad 7 the right angular contact ball bearing inner ring.There is one
The changeover mechanism being made up of adapter 3, sunk screw 4 and pressure ring 5, the step that the outer shroud of angular contact ball bearing is located at adapter are blind
In hole, pressure ring 5 compresses the left side of the angular contact ball bearing on the left side.It facilitates LVDT installation and debugging, and iron can be achieved
The debugging that 360 ° of core, but the mover assembly, in installation process, the inside diameter of its pressure ring 5 is less than angular contact ball bearing 6
Outer annular diameter, therefore before angular contact ball bearing 6 is fixed into connecting shaft, it is necessary to pressure ring 5 is inserted in connecting shaft, assembled
Journey is complicated, and the left side of pressure ring 5 is the end face of connector 1, and how sunk screw 4 is fixed by the seam between pressure ring 5 and connector 1
Gap is fixed to pressure ring 5 and adapter 3, and there is also certain installation difficulty, while its product size is larger, in aerospace field
Using when it is impossible to meet lightweight, miniaturization demand.
The content of the invention
The present invention provides a kind of a kind of redundance LVDT for overcoming above mentioned problem or solving the above problems at least in part
Mover assembly and device, solve in the prior art that LVDT mover assemblies assembling process is cumbersome, and length dimension is bigger than normal, is unsatisfactory for navigating
The problem of empty space industry lightweight, small form factor requirements.
According to an aspect of the present invention, there is provided a kind of redundance LVDT mover assemblies, including iron core and adapter, it is described
Iron core is fixed on one end of adapter；Also include connecting shaft and angular contact ball bearing, the inner ring of the angular contact ball bearing is fixed
In the connecting shaft, the other end of the adapter is provided with blind hole and gland, and bulge loop, the angular contact are provided with the blind hole
The side of the outer shroud of ball bearing abuts the bulge loop, and opposite side is compressed by gland, the outer shroud of the angular contact ball bearing is consolidated
It is scheduled on the adapter, makes adapter and rotatable described in the connection axis connection.
As preferable, the connecting shaft is provided with the shaft shoulder, and the connecting shaft is provided with screw thread close to one end of adapter
Blind hole, housing screw is installed, the diameter of the housing screw is more than the diameter of the connecting shaft, described in the tapped blind hole
The side of the inner ring of angular contact ball bearing abuts the shaft shoulder, and opposite side is compressed by housing screw.
As preferable, the blind hole is two-stage step shape blind hole, the bulge loop in the blind hole correspond in blind hole diameter compared with
Small step, the less step of the diameter are located on the inside of blind hole.
As preferable, the angular contact ball bearing includes two, and described two angular contact ball bearings are installed on back-to-back
One end of the connecting shaft simultaneously keeps gap to coordinate.
As preferable, one end of the adapter secured core is provided with multiple screwed holes, and the iron core passes through screwed hole
It is fixed on the adapter, central shaft of the multiple screwed hole along adapter is centrosymmetric distribution.
As preferable, it is designed with respectively between the housing screw, the shaft shoulder, bulge loop and gland and the angular contact ball bearing
Packing ring.
As preferable, the gland center is provided with the through hole penetrated for connecting shaft, and the gland is consolidated by sunk screw
It is scheduled on the adapter.
A kind of LVDT, including mover assembly described above.
The application proposes a kind of redundance LVDT mover assemblies and LVDT, by the way that adapter and iron core are directly connected to,
Adapter side is provided with blind hole, and is rotatablely connected adapter and a connecting seat by angular contact ball bearing, by connecting shaft conduct
Rotary part, the purpose of directly adjustment mechanical zero is reached using connecting shaft, eliminate the process of many dismounting adjustment, carry significantly
High installation effectiveness；It is big to solve redundance LVDT mover assembly length dimensions simultaneously, it is light to be unsatisfactory for aerospace field part
The problem of quantization, small form factor requirements.
Brief description of the drawings
Fig. 1 is the structural representation of LVDT mover assemblies in the prior art；
Fig. 2 is the schematic cross-section according to the mover assembly of the embodiment of the present invention；
Fig. 3 is the mover assembly overall structure diagram according to the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
As shown in Figures 2 and 3, a kind of redundance LVDT mover assemblies, including iron core 11 and adapter 12, the iron core 11
It is fixed on one end of adapter 12；Also include connecting shaft 14 and angular contact ball bearing 13, the inner ring of the angular contact ball bearing 13
It is fixed in the connecting shaft 14, the other end of the adapter 12 is provided with blind hole and gland 16, and bulge loop is provided with the blind hole,
The side of the outer shroud of the angular contact ball bearing 13 abuts the bulge loop, and opposite side is compressed by gland 16, by the angular contact
The outer shroud of ball bearing 13 is fixed on the adapter 12, the connecting shaft 14 is connected the adapter 12 and rotatable.
The present embodiment by will the left side of adapter 12 connection iron core 11, right side is set to blind hole and the structure of gland 16, and by angle
Contact ball bearing 13 is directly fixed with a connecting shaft 14, in installation process, it is only necessary to connecting shaft 14 is fixed in blind hole again
, i.e., bulge loop is set in blind hole, the side of the outer shroud of angular contact ball bearing 13 is abutted into the bulge loop, opposite side passes through gland
16 are compressed, and the outer shroud of the angular contact ball bearing 13 is fixed on the adapter 12, connect the connecting shaft 14 described
Adapter 12 is simultaneously rotatable.It is simple in construction, the size and installation difficulty of mover assembly in existing scheme are substantially reduced, while again
The axle 14 that is rotatably connected can be utilized to reach the purpose of directly adjustment mechanical zero, avoided with 12 externally threaded tune of adapter
Whole, iron core 11 also follows rotary motion, the phenomenon for causing iron core 11 that friction occurs, collides with stator component inwall, ensure that
LVDT output performance；Many dismountings, installation, the process of adjustment are eliminated simultaneously, substantially increase the effect of mechanical zero adjustment
Rate.
In the present embodiment, further, the connecting shaft 14 is provided with the shaft shoulder, and the connecting shaft 14 is close to adapter 12
One end be provided with tapped blind hole, the shaft shoulder in connecting shaft 14 close to the side of tapped blind hole, in installation corner connection
Position-limiting action is carried out when touching ball bearing 13, housing screw 15, the diameter of the housing screw 15 are installed in the tapped blind hole
More than the diameter of the connecting shaft 14, by being limited in the opposite side of the termination of connecting shaft 14 diagonal contact ball bearing 13 again
Position, the side of the inner ring of the angular contact ball bearing 13 abut the shaft shoulder, and opposite side is compressed by housing screw 15；In this reality
Apply in example, the angular contact ball bearing 13, connecting shaft 14 and housing screw 15 constitute switching component and be arranged on adapter 12 1
In the blind hole of side, the function using connecting shaft 14 as rotary part is realized, solves redundance LVDT mover assembly length dimensions
The problem of bigger than normal.
In the present embodiment, the blind hole is two-stage step shape blind hole, and the race diameter of two-stage step is of different sizes, and blind
Bulge loop in hole corresponds to the less step of diameter in blind hole, and the less step of the diameter is located on the inside of blind hole, by by angular contact
The outside of ball bearing 13 is installed on the step being relatively large in diameter, the diameter of the step being relatively large in diameter be equal or slightly larger than (0.2~
0.5mm) the overall diameter of the outer shroud of angular contact ball bearing 13, to facilitate the installation of angular contact ball bearing 13, and angular contact ball bearing 13
One end abut the less step of diameter, diagonal contact ball bearing 13 carry out it is spacing, opposite side then by 16 spacing compression of gland,
Therefore, during actual installation, it is only necessary to the switching structure for forming angular contact ball bearing 13, connecting shaft 14 and housing screw 15
Part is inserted directly into blind hole, spacing by the side progress of the diagonal outer shroud of contact ball bearing 13 of bulge loop, and installs gland 16, is led to
The opposite side of the outer shroud of the diagonal contact ball bearing 13 of overpressure cap 16 fixes compression and installation can be achieved.
In the present embodiment, the angular contact ball bearing 13 includes two, and described two angular contact ball bearings 13 are back-to-back
It is installed on one end of the connecting shaft 14 and keeps gap to coordinate.
In the present embodiment, one end of the secured core 11 of adapter 12 is provided with multiple screwed holes, and the iron core passes through
Screwed hole is fixed on the adapter 12, and central shaft of the multiple screwed hole along adapter 12 is centrosymmetric distribution.
In the present embodiment, divide between the housing screw 15, the shaft shoulder, bulge loop and gland 16 and the angular contact ball bearing 13
Packing ring is not designed with it.
In the present embodiment, the center of gland 16 is provided with the through hole penetrated for connecting shaft 14, and it is heavy that the gland 16 passes through
Head screw 17 is fixed on the adapter 12.
A kind of LVDT, including mover assembly described above, including iron core and adapter are additionally provided in the present embodiment, it is described
Iron core is fixed on one end of adapter；Also include connecting shaft and angular contact ball bearing, the inner ring of the angular contact ball bearing is fixed
In the connecting shaft, the other end of the adapter is provided with blind hole and gland, and bulge loop, the angular contact are provided with the blind hole
The side of the outer shroud of ball bearing abuts the bulge loop, and opposite side is compressed by gland, the outer shroud of the angular contact ball bearing is consolidated
It is scheduled on the adapter, makes adapter and rotatable described in the connection axis connection.
The present embodiment by will connection iron core on the left of adapter, right side is set to blind hole and gland structure, and by angular contact ball
Bearing is directly fixed with a connecting shaft, in installation process, it is only necessary to connecting shaft is fixed in blind hole again, i.e., in blind hole
Bulge loop is inside set, the side of the outer shroud of angular contact ball bearing is abutted into the bulge loop, opposite side is compressed by gland, by the corner connection
The outer shroud for touching ball bearing is fixed on the adapter, makes adapter and rotatable described in the connection axis connection.It is simple in construction,
The size and installation difficulty of mover assembly in existing scheme are substantially reduced, while and can enough reaches direct using the axle that is rotatably connected
Adjust the purpose of mechanical zero, avoid with the externally threaded adjustment of adapter, iron core also follows rotary motion, cause iron core with
The phenomenon that stator component inwall occurs friction, collided with, ensure that LVDT output performance；Simultaneously eliminate it is many dismounting, installation,
The process of adjustment, substantially increase the efficiency of mechanical zero adjustment.
The application proposes a kind of redundance LVDT mover assemblies and LVDT, by the way that adapter and iron core are directly connected to,
Adapter side is provided with blind hole, and is rotatablely connected adapter and a connecting seat by angular contact ball bearing, by connecting shaft conduct
Rotary part, the purpose of directly adjustment mechanical zero is reached using connecting shaft, eliminate the process of many dismounting adjustment, carry significantly
High installation effectiveness；It is big to solve redundance LVDT mover assembly length dimensions simultaneously, it is light to be unsatisfactory for aerospace field part
The problem of quantization, small form factor requirements.
Finally, the present processes are only preferable embodiment, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., the protection of the present invention should be included in
Within the scope of.
Claims (8)
1. a kind of redundance LVDT mover assemblies, it is characterised in that including iron core and adapter, the iron core is fixed on adapter
One end；Also include connecting shaft and angular contact ball bearing, the inner ring of the angular contact ball bearing is fixed in the connecting shaft, institute
The other end for stating adapter is provided with blind hole and gland, is provided with bulge loop in the blind hole, and the one of the outer shroud of the angular contact ball bearing
Side abuts the bulge loop, and opposite side is compressed by gland, the outer shroud of the angular contact ball bearing is fixed on the adapter,
Make adapter and rotatable described in the connection axis connection.
2. redundance LVDT mover assemblies according to claim 1, it is characterised in that the connecting shaft is provided with the shaft shoulder,
The connecting shaft is provided with tapped blind hole close to one end of adapter, and housing screw, the pressure are provided with the tapped blind hole
The diameter of tight screw is more than the diameter of the connecting shaft, and the side of the inner ring of the angular contact ball bearing abuts the shaft shoulder, separately
Side is compressed by housing screw.
3. redundance LVDT mover assemblies according to claim 1, it is characterised in that the blind hole is that two-stage step shape is blind
Hole, the bulge loop in the blind hole correspond to the less step of diameter in blind hole, and the less step of the diameter is located on the inside of blind hole.
4. redundance LVDT mover assemblies according to claim 1, it is characterised in that the angular contact ball bearing includes two
Individual, described two angular contact ball bearings are installed on one end of the connecting shaft and keep gap to coordinate back-to-back.
5. redundance LVDT mover assemblies according to claim 1, it is characterised in that the one of the adapter secured core
End is provided with multiple screwed holes, and the iron core is fixed on the adapter by screwed hole, and the multiple screwed hole is along adapter
Central shaft be centrosymmetric distribution.
6. redundance LVDT mover assemblies according to claim 2, it is characterised in that the housing screw, the shaft shoulder, bulge loop
Packing ring is designed with respectively between gland and the angular contact ball bearing.
7. redundance LVDT mover assemblies according to claim 1, it is characterised in that the gland center is provided with for connecting
The through hole that axle penetrates, the gland are fixed on the adapter by sunk screw.
8. a kind of LVDT, it is characterised in that including the mover assembly as described in claim 1 to 7 is any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710807281.5A CN107525460B (en) | 2017-09-08 | Redundant LVDT rotor assembly and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710807281.5A CN107525460B (en) | 2017-09-08 | Redundant LVDT rotor assembly and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107525460A true CN107525460A (en) | 2017-12-29 |
| CN107525460B CN107525460B (en) | 2024-10-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790664A (en) * | 2021-09-03 | 2021-12-14 | 北京星空建腾电子科技有限公司 | Linear displacement sensor and rotor assembly thereof |
| CN114396863A (en) * | 2022-01-24 | 2022-04-26 | 厦门乃尔电子有限公司 | Wide-range dual-redundancy linear displacement sensor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2626641Y (en) * | 2003-06-09 | 2004-07-21 | 攀枝花新钢钒股份有限公司线材厂 | Axial fastening device for roll shaft of high-speed wire rod rolling mill |
| US20090080825A1 (en) * | 2007-09-26 | 2009-03-26 | Jtekt Corporation | Angular contact ball bearing |
| CN101968338A (en) * | 2010-09-14 | 2011-02-09 | 国营北京曙光电机厂 | LVDT active cell assembly |
| CN103143971A (en) * | 2013-03-01 | 2013-06-12 | 江苏松野数控科技有限公司 | Pre-drawing structure of ball screw |
| CN205852355U (en) * | 2016-07-29 | 2017-01-04 | 哈尔滨飞机工业集团有限责任公司 | A kind of fixture for slender axles Excircle machining |
| CN206117402U (en) * | 2016-06-29 | 2017-04-19 | 九江精密测试技术研究所 | Jumbo size low inertia is cavity shafting of rotation in succession |
| CN207300150U (en) * | 2017-09-08 | 2018-05-01 | 武汉中航传感技术有限责任公司 | A kind of redundance LVDT mover assemblies and device |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2626641Y (en) * | 2003-06-09 | 2004-07-21 | 攀枝花新钢钒股份有限公司线材厂 | Axial fastening device for roll shaft of high-speed wire rod rolling mill |
| US20090080825A1 (en) * | 2007-09-26 | 2009-03-26 | Jtekt Corporation | Angular contact ball bearing |
| CN101968338A (en) * | 2010-09-14 | 2011-02-09 | 国营北京曙光电机厂 | LVDT active cell assembly |
| CN103143971A (en) * | 2013-03-01 | 2013-06-12 | 江苏松野数控科技有限公司 | Pre-drawing structure of ball screw |
| CN206117402U (en) * | 2016-06-29 | 2017-04-19 | 九江精密测试技术研究所 | Jumbo size low inertia is cavity shafting of rotation in succession |
| CN205852355U (en) * | 2016-07-29 | 2017-01-04 | 哈尔滨飞机工业集团有限责任公司 | A kind of fixture for slender axles Excircle machining |
| CN207300150U (en) * | 2017-09-08 | 2018-05-01 | 武汉中航传感技术有限责任公司 | A kind of redundance LVDT mover assemblies and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790664A (en) * | 2021-09-03 | 2021-12-14 | 北京星空建腾电子科技有限公司 | Linear displacement sensor and rotor assembly thereof |
| CN114396863A (en) * | 2022-01-24 | 2022-04-26 | 厦门乃尔电子有限公司 | Wide-range dual-redundancy linear displacement sensor |
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