NOZZLE ASSEMBLY

• US 20180363684A1
• Filed: 04/27/2018
• Published: 12/20/2018
• Est. Priority Date: 06/19/2017
• Status: Abandoned Application

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: KOZLOWSKI, Piotr, SAWICKI, Piotr
• Application Number:
  US15/964,152
• Publication Number:
  US 20180363684A1
• Time in Patent Office: Days
• CPC Class Codes: F15B 13/0438 the pilot valves being of the nozzle-flapper type
• CPC Class Codes: F15B 19/002 Calibrating
• CPC Class Codes: F15C 3/14 the jet the nozzle being intercepted by a flap
• CPC Class Codes: F16K 31/0627 with movable valve member positioned between seats
• CPC Class Codes: F16K 31/0682 with an articulated or pivot armature

Abstract

A nozzle assembly (N) comprises a nozzle received in a nozzle receiving bore of a nozzle housing. The nozzle receiving bore has a longitudinal axis (X-X). The nozzle housing further comprises a locking pin receiving bore having a longitudinal axis (Y-Y) that is perpendicular to the nozzle housing axis (X-X). The locking pin receiving bore intersects the nozzle receiving bore, whereby an aperture is formed between the locking pin receiving bore and the nozzle receiving bore. A locking pin is received in the locking pin receiving bore, a portion of the locking pin protruding through the aperture and into the nozzle receiving bore so as to engage a circumferential portion of the nozzle.

Claims

1. A nozzle assembly (N) comprising:

a nozzle;

a nozzle housing having a nozzle receiving bore having a longitudinal axis (X-X), the nozzle being received within the nozzle receiving bore;

a locking pin receiving bore having a longitudinal axis (Y-Y) that is perpendicular to the nozzle housing axis (X-X), the locking pin receiving bore intersecting the nozzle receiving bore, whereby an aperture is formed between the locking pin receiving bore and the nozzle receiving bore;

a locking pin received in the locking pin receiving bore, a portion of the locking pin protruding through the aperture and into the nozzle receiving bore so as to engage and interfere with a circumferential portion of the nozzle.

2. A nozzle assembly as claimed in claim 1, wherein the nozzle is received with an interference fit within the nozzle receiving bore.

3. A nozzle assembly as claimed in claim 1, wherein the locking pin is received with a close or loose fit in the locking pin receiving bore.

4. A nozzle assembly as claimed in claim 1, wherein the nozzle receiving bore is cylindrical.

5. A nozzle assembly as claimed in claim 1, wherein the locking pin receiving bore is cylindrical.

6. A nozzle assembly as claimed in claim 1, wherein the locking pin receiving bore is a through bore.

7. A nozzle assembly as claimed in claim 1, wherein the nozzle receiving bore and/or the locking pin receiving bore are circular in cross section.

8. A nozzle assembly as claimed in claim 1, wherein the nozzle and/or the locking pin are circular in cross section.

9. A nozzle assembly as claimed in claim 1, wherein the nozzle is provided with a threaded connection at one end for connection to a calibration tool.

10. A nozzle assembly as claimed in claim 1, wherein the nozzle receiving bore receives a pair of opposed nozzles.

11. A servo valve comprising a nozzle assembly as claimed in claim 1.

12. A method of assembling a nozzle assembly comprising:

providing a nozzle housing having a nozzle receiving bore having a longitudinal axis (X-X) and a locking pin receiving bore having a longitudinal axis (Y-Y) perpendicular to the longitudinal axis (X-X) of the nozzle receiving bore and intersecting the nozzle receiving bore, whereby an aperture is formed between the locking pin receiving bore and the nozzle receiving bore;

inserting a nozzle into the nozzle receiving bore; and

inserting a locking pin into the locking pin receiving bore such that a portion of the locking pin protrudes through the aperture and presses onto a circumferential portion of the nozzle to lock the nozzle in position within the nozzle receiving bore.

13. A method as claimed in claim 12, wherein the nozzle is received in the nozzle receiving bore with an interference fit.

14. A method as claimed in claim 12, wherein the nozzle is inserted or moved in the nozzle receiving bore by a tool engaging an end of the nozzle.

15. A method of calibrating a nozzle assembly which comprises a nozzle housing having a nozzle receiving bore having a longitudinal axis X-X and a locking pin receiving bore having an axis (Y-Y) perpendicular to the axis (X-X) of the nozzle receiving bore and intersecting the nozzle receiving bore, whereby an aperture is formed between the locking pin receiving bore and the nozzle receiving bore;

the method comprising;

moving a nozzle in the nozzle receiving bore to a desired axial position within the nozzle receiving bore; and

inserting a locking pin into the locking pin receiving bore such that a portion of the locking pin protrudes through the aperture and presses onto a circumferential portion of the nozzle to lock the nozzle in the desired axial position within the nozzle receiving bore.

16. A method as claimed in claim 15, wherein the nozzle is received in the nozzle receiving bore with an interference fit.

17. A method as claimed in claim 15, wherein the nozzle is inserted or moved in the nozzle receiving bore by a tool engaging an end of the nozzle.