Pulsed spraybar injector

Patent metadata

Field	Value
Publication number	US-2018280997-A1
Application number	US-201715477583-A
Country	US
Kind code	A1
Filing date	Apr 3, 2017
Priority date	Apr 3, 2017
Publication date	Oct 4, 2018
Grant date	—

Abstract

A spray bar injector including a spray bar defining a longitudinal axis and including a fluid inlet and a plurality of spray outlet orifices spaced apart longitudinally in a direction along the longitudinal axis. A check or spray valve is operatively connected to each spray outlet orifice. A master valve is in fluid communication with the fluid inlet, operatively connected to divert flow from the fluid inlet into a first passage and block flow into a second passage in a first position to open the check valves and issue a spray from the spray outlet orifices, and to divert flow from the fluid inlet into the second passage and block flow into the first passage in a second position to close the check valves and block issue of spray from the spray outlet orifices.

First claim

What is claimed is:

1 . A spray bar injector comprising:
a spray bar defining a longitudinal axis and including a fluid inlet and a plurality of spray outlet orifices spaced apart longitudinally in a direction along the longitudinal axis; a spray valve operatively connected to each spray outlet orifice; a master valve in fluid communication with the fluid inlet, operatively connected to:
divert flow from the fluid inlet into a first passage and block flow into a second passage in a first position to open the check valves and issue a spray from the spray outlet orifices; and
divert flow from the fluid inlet into the second passage and block flow into the first passage in a second position to close the check valves and block issue of spray from the spray outlet orifices.

2 . The injector as recited in claim 1 , wherein each check valve includes a check element seated in a valve seat, wherein the valve seat is in fluid commination with both the first passage and the second passage, wherein the check element blocks fluid communication through the valve seat between the first passage and the second passage.

3 . The injector as recited in claim 2 , wherein the valve seat is longer than the check element to accommodate two positions of the check element within the valve seat including:
a first position pressed by pressure in the first passage away from the respective spray outlet orifice to allow flow from the first passage to issue from the respective spray outlet orifice; and a second position pressed by pressure from the second passage toward the spray outlet orifice for blocking flow from the spray outlet orifice.

4 . The injector as recited in claim 1 , wherein each check valve includes a spin chamber upstream of the respective spray orifice with at least one tangentially directed inlet for fluid communication from the first passage tangentially into the spin chamber to induce spin on fluid issuing from the respective spray outlet orifice.

5 . The injector as recited in claim 1 , wherein each spin chamber has two opposed tangentially directed inlets each in fluid communication with the first passage.

6 . The injector as recited in claim 1 , wherein the spray bar includes an outer sleeve and an inner body, wherein the first and second passages are defined between outer surfaces of the inner body and an inner surface of the sleeve, and wherein the inner body is sealed against the sleeve isolating the first and second passages from fluid communication therebetween.

7 . The injector as recited in claim 6 , wherein the check valves each include a bore through the inner body in a direction perpendicular to the longitudinal axis from the second passage to the respective spray outlet orifice.

8 . The injector as recited in claim 7 , wherein the first passage includes a diametrically opposed pair of branches, each circumferentially spaced apart between the spray orifices and the second passage.

9 . The injector as recited in claim 8 , wherein the first passage includes a radially extending base relative to the longitudinal axis, and wherein an axial bore provides fluid communication from the fluid inlet of the spray bar to the base of the first passage to supply fluid pressure to the branches of the first passage with the master valve in the first position.

10 . The injector as recited in claim 8 , wherein the second passage includes a circumferentially extending base in fluid communication with the inlet, wherein radial bores feed fluid from the fluid inlet of the spray bar to the base of the second passage with the master valve in the second position.

11 . The injector as recited in claim 6 , wherein the fluid inlet of the spray bar includes aligned bores in the sleeve and inner body.

12 . The injector as recited in claim 1 , wherein the master valve is operatively connected for oscillating actuation to an actuator.

13 . The injector as recited in claim 1 , wherein the actuator includes an electronically actuated solenoid operatively connected to drive the master valve for pulsed spray from the spray outlet orifices.

14 . The injector as recited in claim 1 , wherein at least one of the spray outlet orifices is configured to issue a spray cone that varies from orifice to orifice.

15 . A method of making a pulsed spray bar injector comprising:
forming passage surfaces and valve seats in an inner body; seating valve elements in the valve seats; assembling an oscillating master valve into the inner body; and sliding a sleeve over an inner body to define first and second passages for flow from the master valve to the valve seats.

16 . A spray bar injecting arrangement comprising:
a spray bar defining a fluid inlet and a plurality of spray outlet orifices spaced apart longitudinally along the spray bar; a spray valve operatively connected to each spray outlet orifice being movable between an open position that allows fluid flow through the spray outlet orifice and a closed position that blocks flow through the spray outlet orifice; and a master valve in fluid communication with the fluid inlet movable between a first position and a second position such that fluid from the fluid inlet urges each of the spray valves toward the open position when the master valve is in the first position and fluid from the fluid inlet urges each of the spray valves toward the closed position when the master valve is in the second position.

17 . The spray bar injecting arrangement of claim 16 , being further configured to cause fluid traveling through the plurality of spray outlet orifices to rotate relative to a direction that fluid is traveling as it travels through the spray outlet orifices.

18 . The spray bar injecting arrangement of claim 16 , wherein the master valve includes a movable member and two seats, wherein the movable member seals against one of the two seats when the master valve is in the first position and the movable member seals to the other of the two seats when the master valve is in the second position.

19 . The spray bar injecting arrangement of claim 16 , wherein each of the spray valves include a movable element and two seats, wherein the movable element seals against one of the two seats when the spray valve is in the open position and the movable element seals to the other of the two seats when the spray valve is in the closed position.

Assignees

• Delavan Inc

Inventors

• Short John E

Classifications

• F01N2610/00

  Adding substances to exhaust gases · CPC title

• B05B1/083

  the pulsating mechanism comprising movable parts · CPC title

• F01N3/36

  Arrangements for supply of additional fuel · CPC title

• F01N3/2066

  Selective catalytic reduction [SCR] · CPC title

• F01N3/025

  using fuel burner or by adding fuel to exhaust · CPC title