SU1615595A1 - Exhaust device for bed for testing gas-turbine engines - Google Patents

Abstract

The invention relates to installations for testing gas turbine engines (GTEs), in particular, to exhaust devices for test benches for high-temperature ship gas turbines. The purpose of the invention is to increase work efficiency. At the time of the GTE start-up, the engine control panel receives a signal to the actuator 8, which by means of a screw, opening a flexible flexible clamp, has an effect on the drive segments 4, whose grooves include round end lugs of the driven segments 3 - the input section of the ejector receiver opens. The ejecting (exhaust) gas enters the conical shell 2 of the ejector through the gas exhaust pipe. Particles of the ejected low-pressure gas are continuously captured by the ejecting high-pressure jet and entrained in the displacement zone. When the GTE enters the mode is higher than the previous one, i.e. with an increase in the velocity of the ejecting gas, an increase in the velocity difference between the ejecting and ejected gas flows is observed, as a result of which kinetic energy losses increase, due to the deterioration of the displacement flow process. To reduce losses, depending on the velocity of the ejecting gas (operating mode), the actuator from the control panel sends a signal to close the ejector receiver. 1 hp f-ly, 5 ill.

Description

The invention relates to test equipment for testing aircraft gas turbine engines (GTE).

The purpose of the invention is to increase work efficiency. Figure 1 shows the device,; longitudinal section; figure 2 - section aa in figure 1 (hinge); on .fig.Z - section BB in figure 1, the open position; figure 4 is the same, the closed position; figure 5 - constructive scheme of the device (scan).

I Exhaust Gas Turbine Engine Test Bench Device Contains a gas exhaust pipe 1, the conical shell 2. of the ejector and its regulator, which is kinematically connected with the heater, is located between them. Regulatory element is made in | in the form of alternating slave 3 and leading 4 segments located in an overlap and with one edge articulated with a conical shell 2, and the other with a drive. The drive is made in the form of a movable rigid clamp.5, in the lugs 6 of which is installed in Int 7, associated with the actuating mechanism 8. On the screw 7, restrictive stops 9 are provided to disable the actuator 8.

The device works as follows.

At the time of the launch of the CCD, the control unit receives a signal to the actuator 8, which is

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The screw 7, having opened the flexible collar 5, exerts an action on the leading segments 4, in the grooves of which the round end projections of the driven segments 3 enter. At the same time, the inlet section of the ejector opens. The ejecting (exhaust) gas through the gas exhaust pipe 1 enters the ejector. The temperature and velocity of the ejecting gas correspond to the mode of operation of the CCD: the higher the mode, the higher the temperature and velocity of the ejecting gas.

Particles of the ejected low-pressure gas are continuously captured by the ejecting high-pressure jet and are entrained in the mixing zone, whereby a vacuum is maintained at the entrance to the mixing chamber, which allows the ejected gas to flow into the ejector. When the GTE enters the mode is higher than the previous one, i.e. with an increase in the velocity of the ejected gas, an increase in the velocity difference of the ejecting and injected gas flows is observed, resulting in increased kinetic energy losses associated with the deterioration of the process of mixing the flows, which leads to a decrease in engine efficiency. Thus, in the course of GTE operation, in order to reduce losses, depending on the velocity of the ejecting gas (operating mode), the actuator 8 from the control panel is given a signal to close or open the input section of the ejector. After stopping the CCD, the control unit gives a signal to close from the control panel. When reaching the extreme payfig, 1

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Claims (2)

Claim 1. The exhaust device of the test bench for gas turbine engines, containing a gas exhaust pipe, concentric conical shell of the ejector and a control element installed between them kinematically connected to the drive, which, in order to increase efficiency ;, operation, the control element is made in the form of alternating driven and leading conical segments overlapped and with one edge pivotally connected to the conical shell, and the other with the drive. 2. The device according to claim 1, characterized in that the drive is made in the form of a clamp, in the groins of which a screw is installed, connected with the execution 1615595