Nut type mover assembly of tandem dual-redundancy linear displacement sensor

Abstract

The invention discloses a nut type rotor assembly of a tandem type dual-redundancy linear displacement sensor, and belongs to the technical field of linear displacement sensors for aviation. Comprising a moving rod (1), a front redundancy mover iron core (2), a rear redundancy mover iron core (3) and a plug (4), according to the invention, the debugging operation difficulty of the two-redundancy zero position of the series dual-redundancy linear displacement sensor is reduced, the movement amount of the front and rear redundancy mover iron cores in the debugging stage can be controlled through threaded structure connection, and welding and fixing are carried out after debugging is completed. The integrated structure of the moving rod can improve the structural strength of the moving rod, and the front and rear redundancy rotor iron cores are also fixed through laser welding. Therefore, the tandem dual-redundancy linear displacement sensor can be suitable for a complex and severe engine environment, meets the high-reliability use requirement of aerospace equipment, and effectively improves the application range of products.

Description

TECHNICAL FIELD

[0001] The application discloses a series double-redundancy linear displacement sensor nut type mover assembly and belongs to the technical field of linear displacement sensors for aviation. BACKGROUND

[0002] The series double-redundancy linear displacement sensor is internally provided with two channel coils arranged in series along a same measuring axis and used for synchronously measuring the displacement of a same target. Therefore, the two sections of magnetic materials of the mover assembly of the series double-redundancy linear displacement sensor are also arranged in series along the same measuring axis. The existing series double-redundancy sensor structure usually adopts a fixed mover assembly, and the positions of the two coils in the stator assembly are adjusted. This kind of structure needs extremely high machining precision and assembly technology, and is not conducive to the batch production of the series double-redundancy linear displacement sensor. In order to solve the difficulty in zero adjustment and calibration of the mover assembly of the series double-redundancy linear displacement sensor, a series double-redundancy linear displacement sensor nut type mover assembly is designed. The series double-redundancy linear displacement sensor nut type mover assembly can reduce the difficulty in debugging, machining and assembly, and is suitable for complex and severe engine environments. SUMMARY

[0003] The application aims to provide a series double-redundancy linear displacement sensor nut type mover assembly which can guarantee the measurement requirements of the double-redundancy linear displacement sensor in a special engine space and greatly reduce the difficulty in zero adjustment. In order to solve the difficulty in zero adjustment and calibration of the mover assembly of the series double-redundancy linear displacement sensor, a series double-redundancy linear displacement sensor nut type mover assembly is designed.

[0004] The technical scheme of the application is as follows: In order to achieve the above-mentioned purpose, the application realizes the technical scheme as follows: a series double-redundancy linear displacement sensor nut type mover assembly, comprising a moving rod 1, a front redundancy mover iron core 2, a rear redundancy mover iron core 3 and a plug 4. The front redundancy mover iron core 2 is installed on the moving rod 1 and connected through threads. The rear redundancy mover iron core 3 is installed on one end of the moving rod 1 and connected through threads. The plug 4 is installed in the rear redundancy mover iron core 3 and connected through threads. The moving rod 1 is in a rod shape, and a segmented thread is arranged on the outer circumferential surface. In order to guarantee the strength, the diameter cannot be less than 3, and the material is non-magnetic stainless steel.

[0005] The front redundancy mover iron core 2 and the rear redundancy mover iron core 3 are in a crown shape, and a thread is arranged on the inner circumferential surface and matched with the thread of the moving rod 1. The front redundancy mover iron core 2 and the rear redundancy mover iron core 3 are made of magnetic materials, and the wall thickness is greater than 1 mm.

[0006] The cross section of the plug 4 is T-shaped, and an arc groove is arranged at the connection between the small-diameter end and the large-diameter end, and the large-diameter end is connected with the rear excess motion core 3 through laser welding.

[0007] The material of the plug 4 is non-magnetic stainless steel.

[0008] The front excess motion core 2 and the rear excess motion core 3 are moved to the zero position of the corresponding two coils, i.e. the center position of the two coils, through debugging, and then are fixed through laser welding 8.

[0009] The use method of the series double-redundancy linear displacement sensor nut type motion core assembly is as follows: the front excess motion core 2 is installed on the moving rod 1 through the front excess thread 5; the rear excess motion core 3 is installed on the moving rod 1 through the rear excess thread 6; the front and rear positions of the rear excess motion core 3 are adjusted through the rear excess thread 6, so that the zero position of the two channels remains consistent, and then the front excess motion core 2 and the rear excess motion core 3 are welded and fixed to the moving rod 1 through laser welding 8.

[0010] The series double-redundancy linear displacement sensor nut type motion core assembly can reduce the difficulty of the zero position debugging operation of the series double-redundancy linear displacement sensor, the threaded structure connection can control the movement of the front and rear excess motion cores during the debugging stage, and the moving rod integral structure can improve the structural strength, and the front and rear excess motion cores are also fixed through laser welding. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of a series double-redundancy linear displacement sensor nut type motion core assembly.

[0012] Figure 2 It is a schematic view of the assembly of the application to the sensor.

[0013] Wherein 1 is a moving rod, 2 is a front excess motion core, 3 is a rear excess motion core, and 4 is a plug. DETAILED DESCRIPTION

[0014] The application will be further described below with reference to the drawings.

[0015] As Figure 1As shown, a series type double-redundancy linear displacement sensor nut type mover assembly includes a moving rod 1, a front redundancy mover core 2, a rear redundancy mover core 3, and a plug 4; the front redundancy mover core 2 is installed on the moving rod 1 and connected through threads; the rear redundancy mover core 3 is installed on one end of the moving rod 1 and connected through threads, and the plug 4 is installed in the rear redundancy mover core 3 and connected through threads. The moving rod 1 is a bar structure, and a segmented thread is arranged on the outer circumferential surface, so as to ensure the strength, and the diameter cannot be less than 3, and the material is non-magnetic stainless steel.

[0016] The front redundancy mover core 2 and the rear redundancy mover core 3 are crown structures, and threads are arranged on the inner circumferential surfaces and matched with the threads of the moving rod 1, The front redundancy mover core 2 and the rear redundancy mover core 3 are made of magnetic material, and the wall thickness is greater than 1 mm.

[0017] The plug 4 is T-shaped in cross section, an arc groove is arranged at the connection between the small-diameter end and the large-diameter end, and the large-diameter end is fixedly connected with the rear redundancy mover core 3 through laser welding.

[0018] The material of the plug 4 is non-magnetic stainless steel.

[0019] The front redundancy mover core 2 and the rear redundancy mover core 3 are moved to the zero position corresponding to the two coils, i.e., the center position of the two coils, through adjustment, and then fixed through laser welding 8.

[0020] The use method of the application: The front redundancy mover core 2 is installed on the moving rod 1 through the front redundancy thread 5. Then the rear redundancy mover core 3 is installed on the moving rod 1 through the rear redundancy thread 6. The front and rear positions of the rear redundancy mover core 3 are adjusted through the rear redundancy thread 6, so that the zero position of the two channels is consistent and meets the zero position requirement. Then the front redundancy mover core 2 and the rear redundancy mover core 3 are fixedly welded to the moving rod 1 through laser welding 8. Finally, the application is realized.

Claims

1. A series-connected dual-redundant linear displacement sensor nut-type mover assembly, characterized in that, It includes a moving rod (1), a front redundant moving core (2), a rear redundant moving core (3), and a plug (4); the front redundant moving core (2) is installed on the moving rod (1) and connected by a thread; the rear redundant moving core (3) is installed at one end of the moving rod (1) and connected by a thread, and the plug (4) is installed inside the rear redundant moving core (3) and connected by a thread.

2. The nut-type mover assembly of the series dual-redundant linear displacement sensor according to claim 1, characterized in that, The movable rod (1) is a rod-shaped structure with segmented threads on its outer circumference. To ensure strength, the diameter must not be less than Ø3, and the material is non-magnetic stainless steel.

3. The nut-type mover assembly of the series dual-redundant linear displacement sensor according to claim 1, characterized in that, The front redundant moving core (2) and the rear redundant moving core (3) are crown-shaped structures, and the inner circumferential surface is provided with threads that are threaded to the moving rod (1).

4. The nut-type mover assembly of the series dual-redundant linear displacement sensor according to claim 1, characterized in that, The front redundant mover core (2) and the rear redundant mover core (3) are made of magnetic material with a wall thickness of more than 1 mm.

5. The nut-type mover assembly of the series dual-redundant linear displacement sensor according to claim 1, characterized in that, The plug (4) has a T-shaped cross section. The connection between the small diameter end and the large diameter end is provided with an arc groove. The connection between the large diameter end and the rear residual moving core (3) is fixed by laser welding.

6. The nut-type mover assembly of the series dual-redundant linear displacement sensor according to claim 1, characterized in that, The plug (4) is made of non-magnetic stainless steel.

7. The nut-type mover assembly of the series dual-redundant linear displacement sensor according to claim 1, characterized in that, The front redundant mover core (2) and the rear redundant mover core (3) are moved to the zero position of the corresponding two coils, that is, the center position of the two coils, by adjustment, and then fixed by laser welding (8).

8. The method of using the nut-type mover assembly of the series dual-redundant linear displacement sensor according to any one of claims 1-7, characterized in that, The front redundant mover core (2) is installed onto the moving rod (1) through the front redundant thread (5); then the rear redundant mover core (3) is installed onto the moving rod (1) through the rear redundant thread (6); the rear redundant mover core (3) is finely adjusted through the rear redundant thread (6) to keep the zero position of the two channels consistent, and then the front redundant mover core (2) and the rear redundant mover core (3) are welded and fixed to the moving rod (1) by laser welding (8).

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