Wide-range dual-redundancy linear displacement sensor

Abstract

The invention discloses a wide-range dual-redundancy linear displacement sensor, the linear displacement sensor comprises a stator assembly and a rotor assembly, the stator assembly comprises a stator main rod and a stator mounting part, and the rotor assembly comprises a sleeve, a bridging plate, a rotor core rod and an end cover. The rotor core rod is provided with the pull rod and the iron core, so that the length and the stroke of the rotor core rod are increased, and the measuring range of the linear displacement sensor is greatly increased; moreover, the end cover is mounted on the sleeve through the bearing, so that when the driving bracket of the detection equipment generates circumferential rotation at a certain angle, the end cover can rotate on the sleeve through the bearing to eliminate the torsional force of the part, thereby preventing the torsional force of the part from acting on the sleeve and the rotor core rod. Therefore, the safety and the reliability of the linear displacement sensor are improved.

Description

technical field [0001] The invention relates to the technical field of linear displacement sensors, in particular to a large-range double-redundancy linear displacement sensor. Background technique [0002] The function of the differential transformer linear displacement sensor is to convert the mechanical displacement signal of the mover iron core into an electrical signal proportional to it. Widely used in the aerospace field, it can be used for displacement measurement of actuators, valves, valves, piston rods, etc. in flight control systems and servo systems. [0003] In the existing linear displacement sensor, the redundant mover assembly is generally connected by a bearing between the connecting rod and the end cover, and the end cover is fixed with the protruding redundant pull rod. This type of mover structure is only suitable for small The mounting interface of threaded holes is not suitable for linear displacement sensors with long strokes, and has the defect of s...

AI Technical Summary

Problems solved by technology

[0003] In the existing linear displacement sensor, the redundant mover assembly is generally connected by a bearing between the connecting rod and the end cover, and the end cover is fixed with the protruding redundant pull rod. This type of mover structure is only suitable for small The installation interface of threaded holes is not suitable for linear displacement sensors with long strokes, and has the defect of small measuring range

Moreover, since the motion gap between the stator assembly and the mover assembly is very small, friction between the mover rod and the stator assembly will occur during long-term movement, resulting in a decrease in sensor performance; during long-term work, if the bearing inside the mover occurs Failure to rotate normally due to faults such as wear and sticking will cause the circumferential knob to deform or even break the redundant slender rod of the mover, which seriously reduces the safety and reliability of the linear displacement sensor.

Images