1. A power supply circuit disconnection device comprising:
a first connector housing;
a second connector housing fitted to and separated from the first connector housing;
a lever that is rotatably provided on the second connector housing, applies fitting force and separation force between the second connector housing and the first connector housing by rotation of the lever between a first operation position and a connector fitting operation position, and rotates from the connector fitting operation position to a second operation position;
a main circuit switch that has main terminals provided individually on the first connector housing and the second connector housing, is turned to an OFF state at the first operation position of the lever, and is turned to an ON state at the connector fitting operation position and second operation position of the lever;
a signal circuit switch that has signal terminals provided individually on the first connector housing and the lever, is turned to an OFF state at the first operation position and connector fitting operation position of the lever, and is turned to an ON state at the second operation position of the lever;
a first lock portion that locks the lever at the second operation position;
a second lock portion that locks the lever at the connector fitting operation position; and
a lock release operation portion capable of releasing, by an operation of the lock release operation portion, a lock state of the second lock portion.
2. The power supply circuit disconnection device according to claim 1, further comprising:
a lock release inhibiting portion that inhibits movement of the second lock portion to a lock release position at the second operation position of the lever, and allows the second lock portion to move to the lock release position at the connector fitting operation position of the lever.
3. The power supply circuit disconnection device according to either one of claims 1 and 2,
wherein the lever is configured to apply the fitting force and the separation force between the second connector housing and the first connector housing by the rotation of the lever between the first operation position and the connector fitting operation position, and not to apply the fitting force and the separation force between the second connector housing and the first connector housing by rotation of the lever between the connector fitting operation position and the second operation position.
4. The power supply circuit disconnection device according to either one of claims 1 and 2,
wherein the first lock portion is capable of releasing lock of the first lock portion by rotation force applied to the lever by an operator, and the second lock portion is capable of releasing lock of the second lock portion by pressing force of the operator.
5. The power supply circuit disconnection device according to either one of claims 1 and 2,
wherein both of the first lock portion and the second lock portion are capable of releasing lock of the first and second lock portions by pressing force of an operator.
6. The power supply circuit disconnection device according to claim 5,
wherein both of the first lock portion and the second lock portion are provided in the lock release operation portion, and
lock release directions of the first lock portion and the second lock portion are different from each other.
7. The power supply circuit disconnection device according to either one of claims 1 and 2,
wherein the first lock portion also serves as the lock release inhibiting portion.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An acoustic damper comprising:
a sidewall circumscribing a damper volume; and
an orifice plate selectively positioned within the damper volume to form:
a first cavity in fluid communication with a first fluid source; and
a second cavity in fluid communication with the first cavity, the second cavity in fluid communication with a second fluid source.
2. The acoustic damper of claim 1, further comprising:
a first wall separating the first fluid source from the second fluid source, said first wall having a hole for allowing fluid communication between the first fluid source and the first cavity of the acoustic damper wherein said orifice plate separates the first cavity of the acoustic damper from the second cavity of the acoustic damper, said orifice plate having a hole that permits fluid communication between the first cavity of the acoustic damper and the second cavity of the acoustic damper; and
a second wall separating the second cavity of the acoustic damper from the second fluid source, said second wall having a hole that permits fluid communication between the second cavity of the acoustic damper and the second fluid source.
3. The acoustic damper of claim 2, wherein:
the first wall has a plurality of holes for allowing fluid communication between the first fluid source and the first cavity of the acoustic damper, each of said plurality of holes having the same dimensions;
the orifice plate has a plurality of holes for allowing fluid communication between the first cavity of the acoustic dampener and the second cavity of the acoustic dampener, each of said plurality of holes having the same dimensions; and
the second wall has a plurality of holes for allowing fluid communication between the second cavity and a second fluid source, each of said plurality of holes having the same dimensions.
4. The acoustic damper of claim 2, wherein each of a quantity of holes in the first wall, a quantity of holes and second wall, and a quantity of holes in the orifice plate are different.
5. The acoustic damper of claim 2, wherein quantity and dimensions of holes in the first wall, the orifice plate, and the second wall; a volume of the first cavity of the acoustic dampener; and a volume of the second cavity of the acoustic dampener are selected to create vortices for damping acoustic waves generated in the first fluid source.
6. The acoustic damper of claim 1, wherein the first fluid source is a combustion chamber of a gas turbine engine, and the first wall of the acoustic dampener is integral with a combustion chamber liner of the gas turbine engine.
7. The acoustic damper of claim 1, wherein the second fluid source is intake or cooling air of a gas turbine engine.
8. A gas turbine engine comprising:
a combustor; and
an acoustic damper affixed to a combustion chamber liner of the combustor, said acoustic damper comprising:
an orifice plate selectively positioned within the acoustic damper to form
a first cavity having a hole for allowing fluid communication between the first cavity and a first fluid source; and
a second cavity having:
a first hole for allowing fluid communication between the first cavity and the second cavity; and
a second hole for allowing fluid communication between the second cavity and a second fluid source.
9. The gas turbine engine of claim 8, wherein the acoustic damper further comprises:
a first wall for separating a first fluid source from a second fluid source, said first wall having a hole for allowing fluid communication between the first fluid source and the first cavity of the acoustic dampener wherein said orifice plate for separating separates the first cavity of the acoustic damper from the second cavity of the acoustic damper, said second wall having a hole for allowing fluid communication between the first cavity of the acoustic damper in the second cavity of the acoustic damper; and
a second wall for separating the second cavity of the acoustic damper from the second fluid source, said second wall having a hole for allowing fluid communication between the second cavity of the acoustic damper in the second fluid source.
10. The gas turbine engine of claim 9, wherein:
the first wall has a plurality of holes for allowing fluid communication between the first fluid source and the first cavity of the acoustic damper, each of said plurality of holes having the same dimensions;
the orifice plate has a plurality of holes for allowing fluid communication between the first cavity of the acoustic damper in the second cavity of the acoustic damper, each of said plurality of holes having the same dimensions; and
the second wall has a plurality of holes for allowing fluid communication between the second cavity and a second fluid source, each of said plurality of holes having the same dimensions.
11. The gas turbine engine of claim 9, wherein each of a quantity of holes in the first wall, a quantity of holes and second wall, and a quantity of holes in the orifice plate are different.
12. The gas turbine engine of claim 9, wherein a quantity and dimensions of holes in the first wall, the orifice plate, and the second wall; a volume of the first cavity of the acoustic dampener; and a volume of the second cavity of the acoustic damper are selected to create vortices for damping acoustic waves generated in the first fluid source.
13. The gas turbine engine of claim 9, wherein the first fluid source is a combustion chamber of a gas turbine engine, and the first wall of the acoustic damper is integral with a combustion chamber liner of the gas turbine engine.
14. The gas turbine engine of claim 9, wherein the second fluid source is intake or cooling air of a gas turbine engine.
15. A method of making an acoustic damper for a gas turbine engine, said method comprising:
forming a first wall and a cylindrical body wall in a combustion chamber liner of the gas turbine engine;
affixing an orifice plate within a cylinder defined by the cylindrical body wall; and
affixing a second wall to the cylindrical body wall opposite the first wall.
16. The method of claim 15, wherein the orifice plate is affixed to the cylindrical body wall at a predetermined depth within the cylinder defined about the cylindrical body wall.
17. The method of claim 15, further comprising providing a predetermined quantity of holes in the first wall, said holes each having the same predetermined diameter.
18. The method of claim 15, further comprising providing a predetermined quantity of holes in the orifice plate, said holes each having the same predetermined diameter.
19. The method of claim 15, further comprising providing a predetermined quantity of holes in the cylindrical body wall, said holes each having the same predetermined diameter, wherein said holes are located between the orifice plate in the second wall.
20. The method of claim 15, further comprising providing a predetermined quantity of holes in the second wall, said holes each having the same predetermined diameter.