High-pressure-resistant and vibration-resistant LVDT linear displacement sensor

The utility model discloses an LVDT linear displacement sensor resistant to high pressure and vibration. The LVDT linear displacement sensor comprises an outer sleeve, end covers installed at the twoends of the outer sleeve, an inner sleeve placed in an inner hole of the outer sleeve, a primary coil and a secondary coil, wherein the inner sleeve is sleeved with the primary coil and the secondarycoil from inside to outside. An iron core, a sphere support and a sphere pull rod are arranged in an inner hole of the inner sleeve; the sphere support comprises a first sphere and a first threaded section which are connected, and the first threaded section is connected with one end of the iron core; the sphere pull rod comprises a second threaded section, a second sphere and a pull rod which areconnected in sequence, the second threaded section is connected with the other end of the iron core, and the tail end of the pull rod extends out of the adjacent end cover; and the first ball body andthe second ball body are in