SU146136A1 - Gas turbine starting device - Google Patents

Description

There are known devices in which a starting engine, a torque converter with a rotation device and an overtaking clutch are used to start gas turbine engines.

In the described device for launching gas turbine engines, in order to simplify the design, reduce the size and installation power, an accelerating torque converter is used, the turbine rotor of which is designed as a female wheel.

FIG. 1 shows a device for starting gas turbine engines; in fig. 2 is a cross section along A-A in FIG. 1 and in FIG. 3 - automatic start node.

The pump shaft / torque converter is supported by one gear on the shaft 2 of the internal combustion engine, and the other end is fixed in the bearing 3 located in the bore of the shaft of the turbine rotor 4. The turbine rotor of the torque converter has two bearings 5 and 6. The bearing 5 is located in the bore of the cover 7 crankcase 8 starter. The bearing 6 is fixed by an outer ring in the back cover 9 of the turbine, and the inner one is mounted on the shaft 10 of the guide vane 11.

The turbine rotor 4 of the torque converter is designed as a female wheel, which makes it possible to place the shaft-turning device 12 between the starting engine and the torque converter.

To ensure the release of the starting device and the compressor to be started, a bore 14 is located in the bore 13 of the turbine shaft of the torque converter, which is connected to the movable gear coupling 5, which can engage with the gear coupling 16, which sits on the compressor shaft.

When filling the working cavity of the torque converter, the pressure in the bore 13, where the piston 14 is displaced, will rise. Piston 14

No. 146136-2 and coupling 15 will occupy the right position. When the spring / 7 is depressed, the piston 14 will slide, and with it the sleeve 75 will move to the leftmost position, with the result that the starting device is disconnected from the gas turbine unit.

The bore 13 is filled with oil through a small slot 18. The oil is drained from this bore through the spool 19. The spring 20 holds the spool in a position where the oil cannot flow out of the bore 13. When a certain number of rotor speeds are reached, the centrifugal forces, acting on the spool 19, overcome the preliminary tightening of the spring. The spool begins to shift, thereby opening the exit of oil from the bore 75. Since the bore is filled with oil through the small gap 18, and the drain goes through a comparatively larger opening 21, the slide of the spool ensures the pressure in the bore 13 to fall and turn off under the action of the spring 17 toothed couplings. Such a system maintains the working pressure in the cavity of the torque converter, thereby preventing the engine from unloading when the starting device is disconnected from the gas turbine installation. Since the torque converter is able to increase the number of revolutions of the gas turbine installation, there is no need for a gear upshift transmission.

According to the conclusion of US, the use of a torque converter eliminates the need to introduce a gear between the starter motor shaft and the turbocharger shaft.

Subject invention

A device for starting gas turbines, including a starting engine, a torque converter with a rolling gear, and an overtaking clutch, characterized in that, in order to simplify its design, to reduce the installed power and size, an accelerating torque converter is used, the turbine rotor of which in the form of a covering wheel.

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