Electrical connectors
An electrical raft 200 comprising electrical conductors 252 embedded in a rigid material are provided to a gas turbine engine. The raft 200 is used to transport electrical signals (which may be, for example power and/or control signals) around a gas turbine engine. The electrical raft 200 has an electrical connector 700 embedded therein which is used to connect the electrical raft to an electrical unit, such as an EEC of a gas turbine engine The electrical connector 700 is resiliently biased so as to ensure a reliable electrical connection.
1. An electrical raft assembly for a gas turbine engine comprising:
an electrical raft; and
an electrical unit of a gas turbine engine,
the electrical raft comprising:
a rigid material having multiple electrical conductors in the form of a flexible printed circuit embedded therein such that the rigid material surrounds the electrical conductors and fixes the electrical conductors in position, the electrical conductors being a part of an electrical harness of the gas turbine engine;
an electrical connector that electrically connects the electrical conductors in the electrical raft to the electrical unit;
linking conductors being provided between the electrical conductors and the electrical connector; and
a mounting surface on which the electrical unit is mounted, the electrical connector being provided in a recess extending from the mounting surface into the rigid material; wherein
the electrical connector comprises:
an embedded portion that is embedded in the rigid material;
a contact portion, at least partially protruding from a surface of the rigid material, and being in electrical contact with a unit electrical connector on the electrical unit; and
a resiliently biased portion configured to bias the contact portion away from the embedded portion when the contact portion is moved towards the embedded portion, the resiliently biased portion acting in a direction substantially parallel to the mounting surface, and wherein
the electrical unit and the electrical raft are mechanically fixed together using mechanical fixings that are independent of the electrical connector.
2. The electrical raft assembly according to claim 1 , comprising at least two substantially opposing electrical connectors forming at least one set of opposing electrical connectors.
3. The electrical raft assembly according to claim 1 , wherein at least a part of the resiliently biased portion is contained within the rigid material.
4. The electrical raft assembly according to claim 1 , wherein the contact portion of the electrical connector extends from the recess in a direction that is substantially parallel to the mounting surface.
5. The electrical raft assembly according to claim 1 , further comprising mounting portions for mechanically mounting the electrical unit to the electrical raft, the mounting portions being separate from the electrical connector.
6. The electrical raft assembly according to claim 1 , wherein the unit electrical connector and the electrical connector of the electrical raft point in substantially perpendicular directions.
7. An electrical raft assembly according to claim 1 , wherein:
the contact portion of the electrical connector of the electrical raft has a tapered cross-section such that the contact portion is pushed against the resiliently biased portion by the unit electrical connector as the unit electrical connector is moved into position during assembly.
8. A gas turbine engine comprising the electrical raft assembly according to claim 1 .
9. The gas turbine engine according to claim 8 , wherein the electrical raft assembly is a first engine installation component, and the gas turbine engine further comprises:
a second engine installation component having electrical conductors; and
at least one flexible cable connected between the electrical raft assembly and the second engine installation component so as to electrically connect electrical conductors of the electrical raft assembly with electrical conductors of the second engine installation component.
10. A method of assembling an electrical raft assembly according to claim 1 , the method comprising:
moving the electrical raft and the electrical unit together so that the unit electrical connector urges the contact portion of the electrical connector of the electrical raft against the resiliently biased portion, such that the resiliently biased portion provides a biasing force on the contact portion towards the unit electrical connector.