TR201810053A2 - COOLING GAS TURBINE ENGINES WITH WATER RECYCLING PUMP - Google Patents

Abstract

Turbofan Gas Turbine engines turbine disc blade (blade) cooling process, 650 degrees in the temperature of the compressor air by reducing the power of the engine, rather stressful and extra energy spent instead of cooling, the engine main shaft (7) is added to the input part of the 2nd shaft (2) Water recirculation The pump (1) HPT (8) and LPT (9) passes through the turbine blade blades (12), (13) in a cycle equivalent to or faster than the engine speed and transfers heat by providing a more efficient cooling than film cooling.

Description

DESCRIPTION _ _ GAS TURBINE MOTQRLARIV WATER CIRCULATION PUMP Technical field to which the invention relates This invention applies to gas turbine engines in general and more specifically to High and It is related to the cooling of low speed turbine disc and blades with water.

High RPM of Turbine Blades in Known Gas Turbine Turbofan Engines Compressed air from the compressor is released by the combustion of fuel in the combustor. Thrust power is obtained as a result of driving the turbine blades with the energy released, but high heat of around 1700 degrees, which is caused by the combustion in the combustor, metal alloys from which turbine blades are made have become difficult to withstand. turbine blades need to be cooled. best known technique Using the film technique, the turbine blades are wrapped with high-grade compressor air. is to cool. Required cooling air for internal cooling of the blades 20% stolen air from high speed compressor (core engine) Considering that it is air, how much of this amount is needed to get power from the turbine? It's easy to understand how important it is. Core engine in film cooling technique Since around 20% of the compressor air is used for the cooling process. the compressor air cannot be used 100%. Film cooling low Cooling the rotating turbine blades is quite stressful and causes loss of power. is a technique. In this cooling technique, the pressure of the high speed compressor air, the stress caused by hitting the rotating HPT Turbine disc and the turbine speed speed reduction cannot be ignored by the law of physics, with this collision I guess the % number causes it to fall.

Technical problems that the invention aims to solve This invention replaces the turbine disc and blades of Gas Turbine engines in the combustor. HPT in a heat environment of around 1700 degrees, which is released by the combustion of fuel Work from the compressor air, instead of cooling with air at 650-850 degrees, water Cooling of HPT and LPT discs and fins with cooling system With this technique, the HPC is cooling the HPT blades of the compressor. 20% compressed air spent and the effect of this air on the HPT stress relief, as well as HPT occurring during the cooling process It is aimed to solve problems such as speed loss in disks. This There are two basic physical properties that make cooling superior to air cooling.

The first of these is that the thermal conductivity of water is 25 times higher than that of air, The second feature is that the heat carrying capacity of water is 4 times higher than that of air, It needs four times more heat energy to increase its temperature. Gas Turbine blades water cooling technique for Turbine Engines are as follows: is shown.

Figure description Figure 1: The input part of the main shaft of a Turbofan engine is in the form of a horizontal funnel HPT and LPT with extended water circulation pump The scheme of cooling turbine disc and blades with water.

Figure 2: Water Circulation pump Shaft diagram Figure 3: Front view diagram of main shaft input section Figure 4: Connection diagram of the Water Circulation pump shaft to the Main shaft Figure 5: If the Water Circulation pump casing is from the outside to the inside of the motor casing from the inside of bearing R1 located on the 'on-inside of the main shaft connection diagram Figure 6: Cross-section diagram showing the connection of the main shaft parts with the inner shaft Figure 7: Connection of main shaft and intermediate shaft part with inner shaft and HPT and LPT the sky showing the direction of water flow to the discs Figure 8: Evacuation of water from the shaft through the HPT Disc to and from the blades sema showing its arrangement.

Explanation of the references in the figure The description of the numbered parts in the figure is given below: 7- a) Intermediate shaft 7-b) Main and Intermediate shaft stabilizer inner shaft 8: HPT Disk (High Speed Turbine) 9: LPT Disk (Low Speed Turbine) : HPT Water flow channel 11: LPT Water flow channel 12: HPT wing 13: LPT vane 14: Water Cooler pipe (Radiator) : HPT hot water drain 16: LPT hot water drain 19: Engine protection box : LPC Compressor blade (2 stage) 21: Cold water channel. xioianwN-x Referring to Figure 1, for a Turbofan Gas Turbine engine, the Engine Main 4 shaft holder claws (6) horizontally from the inside at the entrance of the shaft (7). It is fixed by passing it into 4 U channels (5) on the pump shaft (2). This cold water inlet from the circulation pump (1) through the main shaft (7) from the gap (17,18) to the turbine disc water channel (10,11) and to the LPT and HPT blades. income. The water discharge mechanism on the wings (12,13) acts as the radiator (15,16). the cold absorbed by the LPC compressor passing through the water cooling pipes (14) cooled by air flow.

Referring to Figure:2, 4 U on one side of the Water Circulation pump shaft(2) The channel (5) is for fixing to the main shaft (7).

Considering Figure:3, the connection section of the water circulation pump shaft(2) to the main shaft(7) front view.

Referring to Figure 4, the fixation of the water circulation pump shaft(2) to the main shaft(7) form is seen.

Referring to Figure 5, the water circulation pump shaft (2) is the input of the motor main shaft (7). water circulation pump(1), partly fixed to four claws(6) from inside the casing(3) is properly fixed to the motor protection (19). water circulation the outside of the pump casing(3) the outside of the motor guard(19) and the inside of the casing(3) The part is fixed to the inner part of the bearing (R1) at the input of the main shaft (7).

Looking at the figure, the intermediate shaft (7a) and the inner shaft (7b) connection and the cold water 4 water channels (21) cross section are seen.

Referring to Figure7, the connection of Main shaft(7), intermediate shaft(7-a) and inner shaft(7-b) and water transition interval(17,18) can be seen.

When looking at Figure 8, the side section of the HPT disc(8) and wing(12) is seen, The cold water passing through the HPT disc(8)(10) enters the turbine blade(12), from here It flows into the space inside the U-shaped circle connecting all the wings from the top. U Each end of the two ends of the circle is inside the left and right waterproof bearing (R4,R5). By fixing it to the part, leakage of water is prevented. Here to the bearings (R4,R5) Since no weight is put on, the HPT disk rotates at any speed. it will not cause a loss of speed and stress. Water circulation and cooling Since the cycle is the same as the engine speed, the engine frame heats up from the wings. It is cooled with the cooling air inside and a very good heat transfer is realized. It is aimed to effectively cool the blades and discs.

How the invention is applied to industry The technique in the cooling process of the Known Gas Turbine engines described above known problems with External Gas Turbine water circulation cooling technique. It is a method that is solved more successfully than other techniques. production With a design and manufacturing study to be made according to the invention technique in the figure It is an industrial product. In the manufacture and working order of the product The obstacle is not any complex technique.

Claims (9)

REQUESTS 1- It is related to turbine cooling for gas turbine engines, its feature is; There is a water circulation pump(1) connected to the main shaft(7) inlet, which will pump the required cooling water to the water circulation pump(1). There are 4 U channels (5) on the shaft (2) for fixing the water circulation pump shaft (2) inside the main shaft (7). 2- According to claim 1, it is related to turbine cooling for gas turbine engines, its feature is; The inside of the main shaft (7) is empty for the flow of water, and there are 4 tabs (6) on the inside for the connection of the pump shaft (2) in the input part of the main shaft (7). 3- According to claims 1 and 2, it is related to turbine cooling for gas turbine engines, its feature is; The outer part of the water circulation pump casing(3) is fixed to the outside of the motor protection casing(19) and to the inner part of the water-proof bearing(R1) which is fixed inside the horizontal funnel-shaped opening at the main shaft(7) inlet on the inside of the pump casing(3). 4- According to Claims 1,2 and 3, it is related to turbine cooling for gas turbine engines and its feature is; The inside of the engine main shaft (7) is wide enough to send sufficient cooling water to the turbine blades (12,13). 5- According to claims 1,2,3 and 4, it is related to turbine cooling for gas turbine engines, its feature is; The end part of the main shaft (7), the intermediate shaft (7,b) has 4 claws (6) from the inside. 6- According to claims 1,2,3,4 and 5, it is related to turbine cooling for gas turbine engines, its feature is; There are 4 U channels (5) on the inner shaft(7,b). 7- It is related to turbine cooling for gas turbine engines according to claim 1,2,3,4,5'6, its feature is; Inner shaft piece(7-b) LPT thickens in curved shape to allow better flow of water into the middle part of the disc. 8- It is related to turbine cooling for gas turbine engines according to claims 1,2,3,4,5,6 and 7, its feature is; The inside of the turbine disc (8,9) (10,11) is empty for water flow, and there are channels for the passage of water under each blade (12,13). 9- It is related to turbine cooling for gas turbine engines according to claims 1,2,3,4,5,6,7 and 8, its feature is; There is a circular water discharge mechanism (15,16) around the turbine blades for the discharge of hot water coming from HPT and LPT blades, It is fixed to the outer part of the bearings (R4,R5) placed on the left and right inside the water discharge assembly (15,16), (R4- R5) The inner part of the bearings is fixed to each end of the U circle connecting the turbine blades (12,13) from above. and its feature is; There are water pipes(l4) that act as a radiator to cool the hot water coming from the water discharge assembly (15,16). ) pump is connected to the water circulation pump inside the casing (3), and water circulation is completed.