Apparatuses, systems, and methods for improved sensor wire retention

Patent metadata

Field	Value
Publication number	US-11047711-B2
Application number	US-201916727998-A
Country	US
Kind code	B2
Filing date	Dec 27, 2019
Priority date	Dec 28, 2018
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

Apparatuses, systems, and associated methods of assembly are described that provide for improved sensor wire retention. An example sensor wire retention device includes a bobbin tube that defines a hollow interior configured to receive a probe assembly inserted therein. The device includes one or more coil elements wrapped around at least a portion of the bobbin tube. One or more washers are attached around the bobbin tube, and each of the one or more washers defines one or more wire notches. The device includes a wire harness of one or more wires, and each of the one or more wires of the wire harness are positioned within the one or more wire notches. The device further includes a return shield element disposed around the wires located within the wire notches of the one or more washers, and the return shield element compresses the one or more wires.

First claim

The invention claimed is:

1. A sensor wire retention device comprising:
a bobbin tube, wherein the bobbin tube defines a hollow interior configured to receive a probe assembly inserted therein;
one or more coil elements wrapped around at least a portion of the bobbin tube;
one or more washers attached around the bobbin tube, wherein each of the one or more washers defines one or more wire notches;
a wire harness comprising one or more wires, wherein each of the one or more wires of the wire harness are positioned within the one or more wire notches of the one or more washers and configured to be communicably coupled with the probe assembly inserted in the bobbin tube; and
a return shield element disposed around the one or more wires located within the one or more wire notches of the one or more washers, wherein the return shield element is configured to compress the one or more wires of the wire harness between the one or more washers and the return shield element so as to reduce strain experienced by the wires.

2. The sensor wire retention device according to claim 1 , wherein each of the one or more washers define two wire notches each configured to receive one or more wires of the wire harness.

3. The sensor wire retention device according to claim 2 , wherein each of the two wire notches are defined by opposing sides of each of the one or more washers.

4. The sensor wire retention device according to claim 1 , further comprising a front fitting disposed on a first end of the bobbin tube, wherein the front fitting is configured to abut a portion of the probe assembly inserted within the bobbin tube.

5. The sensor wire retention device according to claim 4 , further comprising a bobbin plug disposed on a second end of the bobbin tube opposite the first end, wherein the bobbin plug is configured to seal the second end of the bobbin tube.

6. The sensor wire retention device according to claim 1 , further comprising one or more insulating tape layers wrapped around the one or more coil elements.

7. The sensor wire retention device according to claim 6 , wherein the one or more coil elements further comprise a primary coil and a secondary coil, and the one or more insulating tape layers further comprise a first tape layer, a second taper layer, and a third taper layer, and, wherein:
the primary coil is wrapped around the bobbin tube;
the first tape layer is wrapped around the primary coil;
the secondary coil is wrapped around the first tape layer;
the second tape layer is wrapped around the secondary coil;
the return shield element is wrapped around the second tape layer; and
the third tape layer is wrapped around the return shield element.

8. The sensor wire retention device according to claim 2 , wherein the return shield element further comprises two, semi-cylindrical halves that each extend around a portion of the bobbin tube corresponding to the two wire notches.

9. The sensor wire retention device according to claim 1 , further comprising a housing configured to receive the sensor wire retention device therein.

10. The sensor wire retention device according to claim 9 , further comprising a potting compound disposed between the sensor wire retention device and the housing so as to reduce the relative motion between the sensor wire retention device and the housing.

11. A method of assembling a sensor wire retention device, the method comprising:
providing a bobbin tube, wherein the bobbin tube defines a hollow interior configured to receive a probe assembly inserted therein;
wrapping one or more coil elements around at least a portion of the bobbin tube;
attaching one or more washers around the bobbin tube, wherein each of the one or more washers defines one or more wire notches;
positioning one or more wires of a wire harness within the one or more wire notches of the one or more washers, wherein the one or more wires are configured to be communicably coupled with the probe assembly inserted in the bobbin tube; and
providing a return shield element around the one or more wires located within the one or more wire notches of the one or more washers, wherein the return shield element is configured to compress the one or more wires of the wire harness between the one or more washers and the return shield element so as to reduce strain experienced by the wires.

12. The method according to claim 11 , wherein each of the one or more washers define two wire notches each configured to receive one or more wires of the wire harness.

13. The method according to claim 12 , wherein each the two wire notches are defined by opposing sides of each of the one or more washers.

14. The method according to claim 11 , further comprising providing a front fitting on a first end of the bobbin tube, wherein the front fitting is configured to abut a portion of the probe assembly inserted within the bobbin tube.

15. The method according to claim 14 , further comprising providing a bobbin plug on a second end of the bobbin tube opposite the first end, wherein the bobbin plug is configured to seal the second end of the bobbin tube.

16. The method according to claim 11 , further comprising wrapping one or more insulating tape layers around the one or more coil elements.

17. The method according to claim 16 , wherein the one or more coil elements further comprise a primary coil and a secondary coil, and the one or more insulating tape layers further comprise a first tape layer, a second taper layer, and a third taper layer, the method further comprising:
wrapping the primary coil is around the bobbin tube;
wrapping the first tape layer is around the primary coil;
wrapping the secondary coil is around the first tape layer;
wrapping the second tape layer is around the secondary coil;
wrapping the return shield element is around the second tape layer; and
wrapping the third tape layer is around the return shield element.

18. The method according to claim 11 , further comprising providing a housing configured to receive the sensor wire retention device therein.

19. The method according to claim 18 , further comprising disposing a potting compound between the sensor wire retention device and the housing so as to reduce the relative motion between the sensor wire retention device and the housing.

20. A sensor assembly comprising:
a sensor wire retention device comprising:
a bobbin tube, wherein the bobbin tube defines a hollow interior;
one or more coil elements wrapped around at least a portion of the bobbin tube;
one or more washers attached around the bobbin tube, wherein each of the one or more washers defines one or more wire notches;
a wire harness comprising one or more wires, wherein each of the one or more wires of the wire harness are positioned within the one or more wire notches of the one or more washers;
a return shield element disposed around the one or more wires located within the one or more wire notches of the one or more washers, wherein the return shield element is configured to compress the one or more wires of the wire harness between the one or more washers and the return shield element so as to reduce strain experienced by the wires;

a probe assembly, wherein the probe assembly is inserted within the hollow interior of the bobbin tube and communicably coupled with the one or more wires of the wire harness; and
a housing disposed around the sensor wire retention device and probe assembly inserted therein.

Assignees

• Honeywell Int Inc

Inventors

• Ravikumar Hemanth Hiriyur
• Daniels Aaron
• Sajjan Murgesh R

Classifications

• G01D5/2291 Primary

  Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils · CPC title

• G01D11/24

  Housings {; Casings for instruments} · CPC title