Patent Application
20090104015
The technical field generally relates to the handling of gas turbine engines during their packaging in a container.
Oftentimes, small gas turbine engines are individually put in containers at a manufacturing or maintenance plant before being shipped elsewhere or stored. The gas turbine engines are moved within the plant on engine transport devices. They are then transferred to a fixed structure sometimes referred to as a “shipping post”. The shipping post holds the engine while one or more technicians perform some tasks on the engine. This procedure, however, often require numerous transfers from the shipping post to other supporting devices in order for the various packaging tasks to be accomplished. These transfers are time-consuming and accordingly, often result in a loss of productivity. Room for improvements exists.
In one aspect, the present concept provides a method for handing a gas turbine engine during packaging, the method comprising: receiving the engine at a handling apparatus pivotally secured to the floor; removably connecting the engine to the handling apparatus; pivoting the engine while supported on the handling apparatus; lowering the engine into a container; and then removably connecting the engine to the container.
In another aspect, the present concept provides a method for handing a gas turbine engine prior from being set in a container, the method comprising: removably connecting the engine to a rigid support of a handling apparatus, the apparatus being rotatable around a substantially vertical axis; disconnecting the engine from a structure holding the engine immediately before the handling apparatus; rotating the engine around the vertical axis of the apparatus; and then lowering the engine into the container.
In a further aspect, the present concept provides a method of packaging a gas turbine engine into a container, the method comprising: receiving the engine at a handling apparatus pivotally secured to the floor; transferring the engine to the handling apparatus; performing at least one packaging task on the engine and raising the engine at least once while the engine is continuously supported by the handling apparatus; and then transferring the engine directly into the container.
Further details of these and other aspects of the improvements will be apparent from the detailed description and figures included below.
Reference is now made to the accompanying figures depicting aspects of the improved method, in which:
It should be noted that the word “packaging” is a generic word designating the various tasks required to put an engine in a container, and may include the transfer of the engine from an engine transport device to the handling apparatus 10. These tasks can include, for example, draining fluids used in the engine during a bench test, installing plugs to cover openings, securing wires together, etc. A wide range of other tasks can be done as well. Once in the container, the engine can be, for instance, shipped elsewhere or stored while in the container. The engine in the container can be a fully-assembled engine or an engine in which some parts will be assembled later. Also, the word “handling” is a generic word designating the various steps of moving the engine during packaging.
The apparatus 10 shown as an example in
A hoist 24 is provided on the side arm 20. The hoist 24 can include, for instance, a pneumatic motor mechanically connected to a reel supporting a chain or a sling. The illustrated example includes a sling 26.
Gas turbine engines often have two opposite integrated side plates by which the engine can be connected to another structure. The handling apparatus 10 comprises a rigid side support 30 having one end in sliding engagement with the post 16 and an opposite end that can be removably connected to one of the side plates of the engine through an engine mount. The support 30 is said to be rigid, which means that the support 30 is normally rigidly holding the engine in the same position. This facilitates the tasks of the technician or technicians. This does not exclude the possibility of having an adjustable support in which the orientation of the engine can be changed in accordance with one or more degrees of freedom. The connection of the side support 30 with the post 16 can include a flange 32 or another element that is operatively connected to the post 16. In the illustrated example, the flange 32 of the side support 30 is slidably connected to a vertically-extending slot (not shown) on the side of the post 16. The slot, the side arm 20 and the support 30 are in registry with each other. The support 30 is held by the sling 26 of the hoist 24, which sling has a free end attached to a hook or a hole provided on the support 30.
If desired, the post 16 can be provided with a plurality of spaced-apart horizontal holes 40 crossing the vertically-extending slot on the post 16. One or more pins can then be inserted below the support 30 to prevent the engine when one is connected to the support 30, from falling towards the floor in case of a failure of the hoist 24 or any of the parts to which it is connected.
A brake 42 can be used next to the base 12 to prevent the turntable 14, and thus all the other elements connected thereto, from rotating when that is not required. In the illustrated example, the brake 42 includes an actuator with a piston having an end engaging the bottom side of a disk 14a on the pivotable side of the turntable 14. The actuator of the brake 42 can be electric, pneumatic, hydraulic, etc.
The container 60 is positioned on a side of the apparatus 10, such as that slide that is opposite the workspace provided for technician or technicians. The post 16 is then pivoted around the axis of the turntable 14 until the engine 50 be right above the desired location in the container 60.
As can be appreciated, the new method of handling an engine minimises the transfer of the engine 50 to a bear minimum. The handling of the engine 50 is then more easy and efficient.
The above description is meant to be exemplary only, and one skilled in the art will recognize that changes can be made to what is described above without departing from the scope of the appended claims. For example, the hoist can be manually powered or powered using an electric or hydraulic motor. The hoist motor, if any, and its reel do not necessarily need to be provided on a side arm. It can be provided on the post itself, for instance, and the sling or chain can then reach the proper location on the side arm using one or more pulleys. Alternatively, the hoist can be in the form of a screw inside the post and engaged to a follower designed to move the support up or down. A side arm can then be omitted. The slot along the post and which receives the edge of the support can be replaced by an equivalent system, such as a slot in the support and which engages a vertical flange projecting on the side of the post, a carriage with rolls engaged around the post, etc. The brake at the bottom of the apparatus can include pins or similar fasteners to be inserted in corresponding holes so as to prevent the apparatus from rotating. Although it has been suggested in the detailed description that the engine be connected inside the container before disconnecting it from the support of the apparatus, thereby maintaining a constant attachment with a rigid structure at all time, it is possible to design the container so as to temporally support the engine while it is disconnected from the support and prior to connecting it to the container. Although the post is said to be vertical or substantially vertical, it can define a certain angle with the vertical. Similarly, a side arm connected to the post must not necessarily be horizontal and can define a certain angle with the horizontal. It is possible to have a portion of the support of the apparatus being detachable from the rest of the apparatus. This way, the detachable portion can remain with the engine in the container. The engine transport device may be different than that shown in
