A cooling heat exchanger suitable for aircraft engines

Abstract

The present application discloses a cooling heat exchanger suitable for aircraft engines, belonging to the field of aircraft engine technology, which includes an inner tube liquid inlet box, an inner tube liquid outlet box, an outer tube liquid inlet box, an outer tube liquid outlet box, an inner tube and an outer tube, the inner tube liquid inlet box is provided with a first connecting mechanism, the inner tube liquid outlet box is provided with a second connecting mechanism; the two ends of the inner tube are respectively connected to the inner tube liquid inlet box and the inner tube liquid outlet box; the outer tube is sleeved on the inner tube, and the two ends of the outer tube are closed, and the side walls of the two ends of the outer tube are connected with connecting pipes, the outer tube liquid inlet box is provided with a third connecting mechanism, and the outer tube liquid outlet box is provided with a fourth connecting mechanism; the two connecting pipes are respectively connected to the outer tube liquid inlet box and the outer tube liquid outlet box. The present application has the effect of improving the cooling effect of turbine blades with increasing temperature, thereby improving the safety and service life of turbine blades.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft engines, and in particular to a cooling heat exchanger suitable for aircraft engines. Background Art

[0002] If the thrust and thermal efficiency of aviation gas turbine engines are to be improved, the temperature before the turbine must be increased, which is the main technical measure to improve engine performance. The temperature before the turbine of an aircraft engine can continue to increase over time. Generally speaking, the temperature before the inlet of the first-stage turbine with a thrust-to-weight ratio of 10 is about 1950K, and the temperature before the inlet of the first-stage turbine with a thrust-to-weight ratio of 12-15 is above 2100K. When the thrust-to-weight ratio is increased to 15-20, the inlet temperature will reach above 2350K.

[0003] As the temperature before the turbine continues to increase, it poses a huge challenge to the life and safety of the turbine blades. At present, the cooling method of high-temperature hot-end components such as turbine blades is usually a combination of film cooling and internal channel cooling. However, the turbine blade cooling technology using air as the cooling medium has gradually shown its limit in cooling efficiency and may not be able to meet the requirements of the ever-increasing temperature before the turbine. Summary of the invention

[0004] In order to improve the cooling effect of turbine blades with increasing temperatures, thereby improving the safety and service life of the turbine blades, the present application provides a cooling heat exchanger suitable for an aircraft engine.

[0005] The present application provides a cooling heat exchanger suitable for an aircraft engine, which adopts the following technical solution:

[0006] A cooling heat exchanger suitable for an aircraft engine, comprising an inner tube liquid inlet box, an inner tube liquid outlet box, an outer tube liquid inlet box, an outer tube liquid outlet box, an inner tube and an outer tube, the side wall of the inner tube liquid inlet box is provided with a first connecting mechanism, the side wall of the inner tube liquid outlet box is provided with a second connecting mechanism; one end of the inner tube is connected to the inner cavity of the inner tube liquid inlet box through the first connecting mechanism, and the other end of the inner tube is connected to the inner cavity of the inner tube liquid outlet box through the second connecting mechanism;

[0007] The outer tube is sleeved on the inner tube, and both ends of the outer tube are closed. The side walls of both ends of the outer tube are connected with connecting tubes. The side wall of the outer tube liquid inlet box is provided with a third connecting mechanism, and the side wall of the outer tube liquid outlet box is provided with a fourth connecting mechanism; the connecting tube on one end of the outer tube is connected to the inner cavity of the outer tube liquid inlet box through the third connecting mechanism, and the connecting tube on the other end of the outer tube is connected to the inner cavity of the outer tube liquid outlet box through the fourth connecting mechanism;

[0008] The first connecting mechanism, the second connecting mechanism, the third connecting mechanism and the fourth connecting mechanism have the same structure.

[0009] By adopting the above technical scheme, the staff first installs the inner tube liquid inlet box, the inner tube liquid outlet box, the outer tube liquid inlet box and the outer tube liquid outlet box inside the aircraft engine. After that, the staff connects the two ends of the inner tube to the inner tube liquid inlet box and the inner tube liquid outlet box respectively through the first connecting mechanism and the second connecting mechanism, and connects the connecting pipes on the two ends of the outer tube to the outer tube liquid inlet box and the outer tube liquid outlet box respectively through the third connecting mechanism and the fourth connecting mechanism. The staff can adjust the number of inner tubes and outer tubes according to the size of the internal space of the aircraft engine; when the aircraft engine is working normally, the low-temperature aviation kerosene from the fuel tank will flow into the inner tube liquid inlet box, and flow into the inner tube liquid outlet box through the inner tube, and finally can be transported to the combustion chamber, and the combustion efficiency and calorific value of the heated aviation kerosene can be improved; at the same time At the same time, the liquid metal carrying heat will flow into the outer tube inlet tank, and flow into the outer tube outlet tank through the outer tube, and then flow out of the outer tube outlet tank and into the turbine blades; the liquid metal in the outer tube can use its own powerful heat exchange capacity to perform convection heat exchange with the low-temperature kerosene in the inner tube on the one hand, and with the outer duct air flowing through the heat exchanger on the other hand, thereby realizing double heat exchange and thus achieving efficient cooling. The cooled liquid metal can cool the turbine blades, and finally the reheated liquid metal can flow into the outer tube inlet tank through the blade cooling circulation system and circulate; thereby improving the cooling effect of the high-temperature hot end components with continuously increasing temperatures, thereby improving the safety and service life of the turbine blades.

[0010] Preferably, the first connecting mechanism includes a connecting block, a side wall of the inner tube liquid inlet box is provided with a through hole, the connecting block is fixedly connected to the inner wall of the through hole, a through hole is provided in the connecting block, a first bolt is rotatably connected to the side wall of one end of the inner tube, and a first thread groove for threaded connection of the first bolt is provided on the inner wall of one end of the through hole.

[0011] By adopting the above technical solution, when the staff needs to install the inner pipe and the outer pipe, they can first insert these pipes into the through holes on the connecting block, and then rotate the first bolt. The first bolt can be threadedly connected with the connecting block through the first thread groove provided in the through hole, thereby facilitating the staff to install these pipes; at the same time, the staff can also remove these pipes by rotating the first bolt, thereby facilitating the staff to remove these pipes.

[0012] Preferably, the first connecting mechanism also includes a fixing plate and two sealing blocks, the fixing plate is fixedly connected to the side wall of one end of the inner tube, and the two sealing blocks slide toward or away from each other and cooperate with the side wall of the fixing plate; two first slide grooves are provided on the fixing plate, and the two sealing blocks are arranged corresponding to the two first slide grooves, a slider and a first spring are provided in the first slide groove, the slider is slidably connected to the inner wall of the first slide groove, and the slider is fixedly connected to the sealing block; one end of the first spring abuts against the side wall of the slider, and the other end of the first spring abuts against the inner wall of the first slide groove, and the two sealing blocks can abut and cooperate with the inner wall of the through hole.

[0013] By adopting the above technical solution, after the staff inserts the pipe into the through hole and in the process of rotating the first bolt, the pipe continuously moves toward the inner cavity of the box body, and in the process of moving the pipe, it can drive the fixed plate to move, and the movement of the fixed plate can drive the two sealing blocks to move, and then the two sealing blocks can abut against the inner wall of the through hole, and respectively overcome the elastic force of the two first springs to move toward each other, and finally when the staff completely tightens the first bolt, the two sealing blocks can completely abut against the inner wall of the through hole, and the two sealing blocks can also abut against the side wall of the pipe, thereby improving the sealing of the pipe when it is connected; in the process of the staff disassembling the pipe, the pipe can drive the fixed plate to move away from the box body, and at this time the elastic force of the two first springs can push the two sealing blocks to move back and forth.

[0014] Preferably, the first connecting mechanism also includes a driving plate, a second bolt, a pushing assembly for pushing the driving plate to move, and a rotating assembly for driving the driving plate to rotate; the driving plate and the second bolt slide in the inner cavity of the inner tube liquid inlet box, the second bolt is fixedly connected to the driving plate, and the through hole is located at one end of the inner cavity of the inner tube liquid inlet box, and a second thread groove for threaded connection of the second bolt is provided on the inner wall.

[0015] By adopting the above technical scheme, before the staff inserts the pipe into the through hole, the second bolt is threadedly connected to the connecting block through the second thread groove, and the through hole is in a sealed state; thereafter, when the staff drives the pipe to move toward the inner cavity of the box body by rotating the first bolt, the staff can drive the driving plate to rotate through the rotating assembly, and the rotation of the driving plate drives the second bolt to rotate. When the second bolt is rotated to a position away from the connecting block, the liquid in the box body can flow into the pipe; when the staff moves the pipe in a direction away from the box body, the second bolt and the driving plate can be driven to rotate through the rotating assembly, and at the same time, the pushing assembly can push the second bolt and the driving plate to move in a direction close to the connecting block. Subsequently, when the second bolt moves to a position in contact with the connecting block, the rotating assembly can drive the second bolt to rotate into the through hole through the second thread groove, thereby sealing the through hole, thereby reducing the work intensity of the staff.

[0016] Preferably, the pushing assembly includes a first sleeve and a third bolt, one end of the first sleeve is fixedly connected to a side of the driving plate away from the connecting block, one end of the third bolt is fixedly connected to the inner wall of the inner tube liquid inlet box, and a third thread groove is provided in the first sleeve for threaded connection of the third bolt.

[0017] By adopting the above technical solution, during the process of workers plugging in or disassembling pipes, the drive plate can rotate, and the drive plate can drive the first sleeve to rotate. During the rotation, the first sleeve can be threadedly engaged with the bolt through the third thread groove, thereby driving the second bolt and the drive plate to move away from or close to the connecting block, thereby reducing the difficulty for workers to drive the second bolt and the drive plate to move.

[0018] Preferably, the rotating assembly comprises a second sleeve, a connecting rod and a guide rod, the second sleeve is rotatably connected to the inner wall of the through hole, a plurality of spiral grooves are provided on the inner wall of the second sleeve, a plurality of spiral blocks are fixedly connected to the side wall of the inner tube, the plurality of spiral grooves are correspondingly arranged to the plurality of spiral blocks, and the plurality of spiral blocks are threadedly matched with the plurality of spiral grooves;

[0019] A first storage groove is formed on the inner wall of the through hole, a first gear and a second gear are disposed in the first storage groove, the first gear is fixedly connected to the side wall of the second sleeve, the connecting rod is rotatably connected to the inner wall of the connecting block, one end of the connecting rod is passed through the inner wall of the first storage groove and extends into the first storage groove, the second gear is fixedly connected to the side wall of the connecting rod, and the second gear is meshed with the first gear;

[0020] The other end of the connecting rod is passed through the inner wall of the connecting block and extends to the inner cavity of the inner tube liquid inlet box. A through groove is provided on the side of the connecting rod close to the driving plate. A guide groove is provided on the inner wall of the through groove. One end of the guide rod slides in the through groove. A guide block is fixedly connected to the guide rod, and the guide block is slidably connected to the inner wall of the guide groove.

[0021] A sliding hole and a second sliding groove are sequentially formed on one side of the driving plate close to the connecting block, the sliding hole is communicated with the second sliding groove, one end of the guide rod away from the connecting block is inserted into the sliding hole and the second sliding groove, and the guide rod is slidably connected to the inner wall of the sliding hole; a third gear and a fourth gear are provided in the second sliding groove, the third gear is fixedly connected to the inner wall of the second sliding groove, the fourth gear is fixedly connected to the side wall of the guide rod, and the fourth gear is meshed with the third gear.

[0022] By adopting the above technical solution, during the process of connecting or disassembling the pipeline by the staff, the spiral block on the pipeline can be threadedly matched with the spiral groove on the second sleeve, thereby driving the second sleeve to rotate, the rotation of the second sleeve drives the first gear to rotate, the rotation of the first gear drives the second gear to rotate, the rotation of the second gear drives the connecting rod to rotate, the connecting rod can drive the guide rod to rotate through the guide block, the rotation of the guide rod drives the fourth gear to rotate, the rotation of the fourth gear drives the third gear to rotate, the rotation of the third gear drives the second bolt and the driving plate to rotate, and at the same time, when the driving plate is moving toward or away from the connecting block, the guide block can be slidably connected to the inner wall of the guide groove, thereby reducing the difficulty for the staff to drive the second bolt and the driving plate to rotate.

[0023] Preferably, a second storage groove is provided in the connection block, a driving rod, a driving block and a limiting block are provided in the second storage groove, and the driving block and the limiting block are respectively fixedly connected to the side walls at both ends of the driving rod; the driving block is penetrated through the inner wall of the second storage groove and extends into the through hole, and a slope is provided on the driving block, and the driving block abuts and cooperates with the side wall of the inner tube;

[0024] The limit block is penetrated through the inner wall of the second storage groove and extends into the through hole, and a limit groove for the limit block to be inserted is opened on the side wall of the second bolt; a second spring is arranged in the second storage groove, one end of the second spring is fixedly connected to the driving rod, and the other end of the second spring is fixedly connected to the inner wall of the second storage groove away from the inner tube.

[0025] By adopting the above technical solution, before the staff inserts the pipe into the through hole, the limit block is inserted into the limit groove and the driving block is located in the through hole. Later, in the process of inserting the pipe into the through hole, the side wall of the pipe can push the driving block to move in the direction away from the pipe through the inclined surface on the driving block. The movement of the driving block can drive the driving rod to overcome the elastic force of the second spring to move, and the movement of the driving rod drives the limit block to move. Subsequently, when the limit block moves to a position away from the second bolt, the limit of the second bolt by the limit block can be released, and then it is convenient for the staff to drive the second bolt and the driving plate to rotate; when the staff removes the pipe, the elastic force of the second spring can push the driving rod and the limit block to move in the direction close to the pipe, and when the limit block moves and is inserted into the limit groove on the second bolt, the second bolt can be limited, thereby reducing the possibility of the second bolt loosening due to vibration.

[0026] Preferably, the inner tube and the outer tube are both spiral-shaped.

[0027] By adopting the above technical solution, the spiral inner tube and outer tube can not only increase the heat exchange area between liquid metal and low-temperature aviation kerosene and outer duct air, but the staff can also adjust the structure of the overall heat exchanger according to the space size in the aircraft engine to facilitate the installation and disassembly of the heat exchanger.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The staff first installs the inner tube liquid inlet box, the inner tube liquid outlet box, the outer tube liquid inlet box and the outer tube liquid outlet box inside the aircraft engine. After that, the staff connects the two ends of the inner tube to the inner tube liquid inlet box and the inner tube liquid outlet box respectively through the first connecting mechanism and the second connecting mechanism, and connects the connecting pipes on the two ends of the outer tube to the outer tube liquid inlet box and the outer tube liquid outlet box respectively through the third connecting mechanism and the fourth connecting mechanism. The staff can adjust the number of inner tubes and outer tubes according to the size of the internal space of the aircraft engine; when the aircraft engine is working normally, the low-temperature aviation kerosene from the fuel tank will flow into the inner tube liquid inlet box, and flow into the inner tube liquid outlet box through the inner tube, and finally can be transported to the combustion chamber, and the combustion efficiency and calorific value of the heated aviation kerosene can be improved; at the same time, it carries The hot liquid metal will flow into the outer tube inlet tank, and then flow into the outer tube outlet tank through the outer tube, and then flow out of the outer tube outlet tank and flow into the turbine blades; the liquid metal in the outer tube can use its own strong heat exchange capacity to perform convection heat exchange with the low-temperature kerosene in the inner tube on the one hand, and with the outer duct air flowing through the heat exchanger on the other hand, thereby realizing double heat exchange and thus achieving efficient cooling. The cooled liquid metal can cool the turbine blades, and finally the reheated liquid metal can flow into the outer tube inlet tank through the blade cooling circulation system and perform circulation work; thereby improving the cooling effect of the high-temperature hot end components with continuously increasing temperatures, thereby improving the safety and service life of the turbine blades;

[0030] 2. When the staff needs to install the inner pipe and the outer pipe, they can first insert the pipes into the through holes on the connecting block, and then turn the first bolt. The first bolt can be threadedly connected with the connecting block through the first thread groove provided in the through hole, so that it is convenient for the staff to install the pipes; at the same time, the staff can also remove the pipes by turning the first bolt, so that it is convenient for the staff to remove the pipes;

[0031] 3. After the staff inserts the pipe into the through hole and rotates the first bolt, the pipe continuously moves toward the inner cavity of the box body. During the movement of the pipe, it can drive the fixed plate to move, and the movement of the fixed plate can drive the two sealing blocks to move. After that, the two sealing blocks can abut against the inner wall of the through hole and respectively overcome the elastic force of the two first springs to move toward each other. Finally, when the staff completely tightens the first bolt, the two sealing blocks can completely abut against the inner wall of the through hole, and the two sealing blocks can also abut against the side wall of the pipe, thereby improving the sealing performance when the pipe is connected; in the process of the staff disassembling the pipe, the pipe can drive the fixed plate to move away from the box body, and the elastic force of the two first springs can push the two sealing blocks to move back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application;

[0033] Figure 2 is a cross-sectional view of the inner tube liquid inlet box in an embodiment of the present application;

[0034] Figure 3 is a cross-sectional view of a fixing plate in an embodiment of the present application;

[0035] Figure 4 is a structural schematic diagram highlighting the connecting rod in an embodiment of the present application;

[0036] Figure 5 It is a cross-sectional view of the connecting rod in the embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1. Inner tube liquid inlet box; 11. Inner tube liquid outlet box; 12. Outer tube liquid inlet box; 13. Outer tube liquid outlet box; 14. Inner tube; 15. Outer tube; 16. First connecting mechanism; 17. Second connecting mechanism; 18. Connecting pipe; 19. Third connecting mechanism; 20. Fourth connecting mechanism; 3. Connecting block; 31. Perforation; 32. Through hole; 33. First bolt; 34. First threaded groove; 41. Fixed plate; 42. Sealing block; 43. First slide groove; 44. Sliding block; 45. First spring; 5. Driving plate; 51. Second bolt; 52. Pushing assembly; 53. Rotating assembly ; 54, second thread groove; 6, first sleeve; 61, third bolt; 62, third thread groove; 7, second sleeve; 71, connecting rod; 72, guide rod; 73, spiral groove; 74, spiral block; 75, first storage groove; 76, first gear; 77, second gear; 78, through groove; 79, guide groove; 80, guide block; 81, slide hole; 82, second slide groove; 83, third gear; 84, fourth gear; 9, second storage groove; 91, drive rod; 92, drive block; 93, limit block; 94, inclined surface; 95, limit groove; 96, second spring. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-5 This application is described in further detail.

[0040] The present application discloses a cooling heat exchanger suitable for an aircraft engine. Figure 1 As shown, it includes an inner tube liquid inlet box 1, an inner tube liquid outlet box 11, an outer tube liquid inlet box 12, an outer tube liquid outlet box 13, an inner tube 14 and an outer tube 15. The side wall of the inner tube liquid inlet box 1 is provided with a first connecting mechanism 16, and the side wall of the inner tube liquid outlet box 11 is provided with a second connecting mechanism 17; one end of the inner tube 14 is connected to the inner cavity of the inner tube liquid inlet box 1 through the first connecting mechanism 16, and the other end of the inner tube 14 is connected to the inner cavity of the inner tube liquid outlet box 11 through the second connecting mechanism 17.

[0041] like Figure 1 As shown, there are multiple inner tubes 14 and outer tubes 15, and the multiple inner tubes 14 are arranged in a one-to-one correspondence with the multiple outer tubes 15, and the inner tubes 14 and the outer tubes 15 are both spiral; the diameter of the outer tube 15 is larger than the diameter of the inner tube 14, the outer tube 15 is sleeved on the inner tube 14, and the two ends of the outer tube 15 are closed, and the multiple inner tubes 14 are arranged side by side; the side walls of both ends of the outer tube 15 are connected with connecting pipes 18, the side wall of the outer tube liquid inlet box 12 is provided with a third connecting mechanism 19, and the side wall of the outer tube liquid outlet box 13 is provided with a fourth connecting mechanism 20; the connecting pipe 18 on one end of the outer tube 15 is connected to the inner cavity of the outer tube liquid inlet box 12 through the third connecting mechanism 19, and the connecting pipe 18 on the other end of the outer tube 15 is connected to the inner cavity of the outer tube liquid outlet box 13 through the fourth connecting mechanism 20; the first connecting mechanism 16, the second connecting mechanism 17, the third connecting mechanism 19 and the fourth connecting mechanism 20 have the same structure; and the outer surface of the inner tube 14 is sprayed with a liquid metal corrosion-resistant coating.

[0042] like Figure 1 As shown, the staff first installs the inner tube liquid inlet box 1, the inner tube liquid outlet box 11, the outer tube liquid inlet box 12 and the outer tube liquid outlet box 13 inside the aircraft engine. After that, the staff connects the two ends of the inner tube 14 to the inner tube liquid inlet box 1 and the inner tube liquid outlet box 11 respectively through the first connecting mechanism 16 and the second connecting mechanism 17, and connects the connecting pipes 18 on the two ends of the outer tube 15 to the outer tube liquid inlet box 12 and the outer tube liquid outlet box 13 respectively through the third connecting mechanism 19 and the fourth connecting mechanism 20. The staff can adjust the number of inner tubes 14 and outer tubes 15 according to the size of the internal space of the aircraft engine.

[0043] like Figure 1 As shown, when the aircraft engine is working normally, the low-temperature aviation kerosene from the fuel tank will flow into the inner tube inlet tank 1, and flow into the inner tube outlet tank 11 through the inner tube 14, and finally can be transported to the combustion chamber, and the combustion efficiency and calorific value of the heated aviation kerosene can be improved; at the same time, the liquid metal carrying heat will flow into the outer tube inlet tank 12, and flow into the outer tube outlet tank 13 through the outer tube 15, and then can flow out from the outer tube outlet tank 13 and flow into the turbine blades; the liquid metal of the outer tube 15 can utilize its own strong heat exchange capacity, on the one hand, it can exchange heat with the inner tube 14 On the one hand, it can carry out convective heat exchange with the low-temperature kerosene, and on the other hand, it can carry out convective heat exchange with the outer duct air flowing through the heat exchanger, so as to realize double heat exchange, and then can carry out efficient cooling. The cooled liquid metal can cool the turbine blades, and finally the reheated liquid metal can flow into the outer tube inlet tank 12 through the blade cooling circulation system and carry out circulation work; wherein, the liquid metal can be gallium and gallium alloy; thereby, it can improve the cooling effect of the high-temperature hot end components with continuously increasing temperature, and then can improve the safety and service life of the turbine blades.

[0044] like Figure 1 As shown, the spiral inner tube 14 and outer tube 15 can not only increase the heat exchange area between liquid metal and low-temperature aviation kerosene and outer duct air, but also make it easier for workers to adjust the structure of the overall heat exchanger according to the space size in the aircraft engine to facilitate the installation and disassembly of the heat exchanger.

[0045] like Figure 1 and Figure 2 As shown, the first connecting mechanism 16 includes a connecting block 3, which is cylindrical, and a through hole 31 is provided on the side wall of the inner tube liquid inlet box 1. The connecting block 3 is fixedly connected to the inner wall of the through hole 31, and the connecting block 3 and the side wall of the inner tube liquid inlet box 1 are integrally formed; a through hole 32 is provided in the connecting block 3, and the through hole 32 extends along the axial direction of the connecting block 3. A first bolt 33 is rotatably arranged on the peripheral side wall at the end of the inner tube 14 through a bearing sleeve, and a first thread groove 34 for threaded connection of the first bolt 33 is provided on the inner wall of one end of the through hole 32 connected to the external environment.

[0046] like Figure 1 and Figure 2 As shown, when the staff needs to install the inner tube 14 and the outer tube 15, they can first insert these pipes into the through hole 32 on the connecting block 3, and then rotate the first bolt 33. The first bolt 33 can be threadedly connected with the connecting block 3 through the first thread groove 34 set in the through hole 32, so that the staff can easily install these pipes; at the same time, the staff can also remove these pipes by rotating the first bolt 33, so that the staff can easily remove these pipes.

[0047] like Figure 2 and Figure 3 As shown, combined Figure 1 The first connecting mechanism 16 also includes a fixing plate 41 and two sealing blocks 42. The fixing plate 41 is in the shape of an annular plate and is sleeved and fixed on the peripheral side wall at the port of the inner tube 14. The fixing plate 41 is located below the first bolt 33. The two sealing blocks 42 slide toward or away from each other and cooperate with the bottom side wall of the fixing plate 41; the bottom side wall of the fixing plate 41 is provided with two first slide grooves 43, and the cross section of the first slide groove 43 is T-shaped; the two sealing blocks 42 are arranged corresponding to the two first slide grooves 43, and the first slide groove 43 A slider 44 and a first spring 45 are provided inside. The cross section of the slider 44 is T-shaped. The first spring 45 is arranged along the radial direction of the inner tube 14. The slider 44 is connected to the inner wall of the first slide groove 43 by sliding along the radial direction of the inner tube 14. The slider 44 is fixedly connected to the top side wall of the sealing block 42; one end of the first spring 45 abuts against the side wall of the slider 44, and the other end of the first spring 45 abuts against the inner wall of one end of the first slide groove 43 close to the inner tube 14. Both sealing blocks 42 can abut and cooperate with the inner wall of the through hole 32.

[0048] like Figure 2 and Figure 3 As shown, after the staff inserts the pipe into the through hole 32 and in the process of rotating the first bolt 33, the pipe continuously moves toward the inner cavity of the box body. During the movement of the pipe, it can drive the fixing plate 41 to move, and the movement of the fixing plate 41 can drive the two sealing blocks 42 to move. After that, the two sealing blocks 42 can abut against the inner wall of the through hole 32 and respectively overcome the elastic force of the two first springs 45 to move toward each other. Finally, when the staff completely tightens the first bolt 33, the two sealing blocks 42 can completely abut against the inner wall of the through hole 32, and the two sealing blocks 42 can also abut against the side wall of the pipe, thereby improving the sealing performance when the pipe is connected; in the process of the staff disassembling the pipe, the pipe can drive the fixing plate 41 to move away from the box body, and at this time, the elastic force of the two first springs 45 can push the two sealing blocks 42 to move back.

[0049] like Figure 1 and Figure 2 As shown, the first connecting mechanism 16 also includes a driving plate 5, a second bolt 51, a pushing component 52 for pushing the driving plate 5 to move, and a rotating component 53 for driving the driving plate 5 to rotate; the driving plate 5 is cylindrical, and the driving plate 5 and the second bolt 51 both slide in the inner cavity of the inner tube liquid inlet box 1 along the axial direction of the inner tube 14, and the second bolt 51 corresponds to the inner cavity of the through hole 32, and the second bolt 51 is fixedly connected to the top side wall of the driving plate 5, and the through hole 32 is located at one end of the inner cavity of the inner tube liquid inlet box 1. The inner wall is provided with a second thread groove 54 for the second bolt 51 to be threadedly connected.

[0050] like Figure 1 and Figure 2 As shown, before the staff inserts the pipe into the through hole 32, the second bolt 51 is threadedly connected to the connecting block 3 through the second thread groove 54, and the through hole 32 is in a sealed state; thereafter, when the staff drives the pipe to move toward the inner cavity of the box body by rotating the first bolt 33, the driving plate 5 can be driven to rotate by the rotating component 53, and the rotation of the driving plate 5 drives the second bolt 51 to rotate. When the second bolt 51 is rotated to a position away from the connecting block 3, the liquid in the box body can flow into the pipe; when the staff moves the pipe in a direction away from the box body, the second bolt 51 and the driving plate 5 can be driven to rotate by the rotating component 53, and at the same time, the pushing component 52 can push the second bolt 51 and the driving plate 5 to move in a direction close to the connecting block 3. Subsequently, when the second bolt 51 moves to a position in contact with the connecting block 3, the rotating component 53 can drive the second bolt 51 to rotate into the through hole 32 through the second thread groove 54, so that the through hole 32 can be sealed, thereby reducing the work intensity of the staff.

[0051] like Figure 2 and Figure 4As shown, the pushing assembly 52 includes a first sleeve 6 and a third bolt 61. The first sleeve 6 is cylindrical. The top end of the first sleeve 6 is fixedly connected to the side of the driving plate 5 away from the connecting block 3. One end of the third bolt 61 is fixedly connected to the inner wall of the inner tube liquid inlet box 1. A third thread groove 62 for threaded connection of the third bolt 61 is provided in the side wall of the bottom end of the first sleeve 6. During the process of plugging or disassembling the pipeline by the staff, the driving plate 5 can rotate at this time, and the driving plate 5 can drive the first sleeve 6 to rotate. During the rotation process, the first sleeve 6 can be threadedly matched with the bolt through the third thread groove 62, thereby driving the second bolt 51 and the driving plate 5 to move in a direction away from or close to the connecting block 3, thereby reducing the difficulty of the staff to drive the second bolt 51 and the driving plate 5 to move.

[0052] like Figure 2 and Figure 4 As shown, combined Figure 5 The rotating assembly 53 includes a second sleeve 7, two connecting rods 71 ​​and two guide rods 72. The second sleeve 7 is rotatably connected to the inner wall of the through hole 32 through a bearing. A plurality of spiral grooves 73 are provided on the inner wall of the second sleeve 7. A plurality of spiral blocks 74 are fixedly connected to the outer peripheral side wall of the inner tube 14. The spiral blocks 74 are integrally formed with the side wall of the inner tube 14. The plurality of spiral grooves 73 are correspondingly arranged with the plurality of spiral blocks 74, and the plurality of spiral blocks 74 are threadedly matched with the plurality of spiral grooves 73; the two connecting rods 71 ​​are correspondingly arranged with the two guide rods 72, and the two connecting rods 71 ​​are symmetrically arranged along the axis of the connecting block 3. The connecting rod 71 is cylindrical and is arranged along the axial direction of the connecting block 3. The connecting rod 71 is rotatably connected to the inner wall of the connecting block 3 through a bearing.

[0053] like Figure 2 and Figure 4 As shown, a first storage groove 75 is provided on the inner wall of the through hole 32, and the first storage groove 75 is communicated with the through hole 32. A first gear 76 and two second gears 77 are provided in the first storage groove 75. The first gear 76 is sleeved and fixed on the peripheral side wall of the second sleeve 7, and the two second gears 77 are arranged corresponding to the two connecting rods 71. The top end of the connecting rod 71 is passed through the inner wall of the first storage groove 75 and extends into the first storage groove 75. The second gear 77 is sleeved and fixed on the side wall of the connecting rod 71, and the second gear 77 is meshed with the first gear 76.

[0054] like Figure 2 and Figure 4 As shown, combined Figure 5The bottom end of the connecting rod 71 is penetrated through the inner wall of the connecting block 3 and extends to the inner cavity of the inner tube liquid inlet box 1. A through groove 78 is provided on the side of the connecting rod 71 close to the driving plate 5. The through groove 78 extends along the axial direction of the connecting rod 71. Two guide grooves 79 are provided on the inner wall of the through groove 78. The guide groove 79 extends along the axial direction of the connecting rod 71. The top end of the guide rod 72 slides in the through groove 78 along the axial direction of the connecting rod 71. Two guide blocks 80 are fixedly connected to the peripheral side wall of the top end of the guide rod 72. The two guide blocks 80 are arranged corresponding to the two guide grooves 79. The guide blocks 80 are connected to the inner wall of the guide groove 79 by sliding along the axial direction of the connecting rod 71.

[0055] like Figure 5 As shown, a sliding hole 81 and a second sliding groove 82 are sequentially opened on one side of the driving plate 5 close to the connecting block 3. The sliding hole 81 and the second sliding groove 82 are in an annular shape. The sliding hole 81 is communicated with the second sliding groove 82. The end of the guide rod 72 away from the connecting block 3 is penetrated through the sliding hole 81 and the second sliding groove 82. The guide rod 72 is slidably connected to the inner wall of the sliding hole 81 along the circumferential direction; a third gear 83 and two fourth gears 84 are provided in the second sliding groove 82. The third gear 83 is fixedly connected to the inner peripheral wall of the second sliding groove 82. The two fourth gears 84 are arranged corresponding to the two guide rods 72. The fourth gear 84 is sleeved and fixed on the bottom peripheral side wall of the guide rod 72, and the fourth gear 84 is meshed with the third gear 83.

[0056] like Figure 2 and Figure 4 As shown, combined Figure 5 When the staff connects or removes the pipeline, the spiral block 74 on the pipeline can be threadedly matched with the spiral groove 73 on the second sleeve 7, thereby driving the second sleeve 7 to rotate, and the rotation of the second sleeve 7 drives the first gear 76 to rotate, the rotation of the first gear 76 drives the second gear 77 to rotate, and the rotation of the second gear 77 drives the connecting rod 71 to rotate, and the connecting rod 71 can drive the guide rod 72 to rotate through the guide block 80, and the rotation of the guide rod 72 drives the fourth gear 84 to rotate, and the rotation of the fourth gear 84 drives the third gear 83 to rotate, and the rotation of the third gear 83 drives the second bolt 51 and the driving plate 5 to rotate. At the same time, when the driving plate 5 moves toward or away from the connecting block 3, the guide block 80 can be slidably connected to the inner wall of the guide groove 79, thereby reducing the difficulty of the staff driving the second bolt 51 and the driving plate 5 to rotate.

[0057] like Figure 2As shown, two second storage slots 9 are provided in the connecting block 3, and the two second storage slots 9 are symmetrically arranged along the axis of the connecting block 3. A driving rod 91, a driving block 92 and a limit block 93 are arranged in the second storage slot 9; the driving rod 91, the driving block 92 and the limit block 93 are all in the shape of a rectangular parallelepiped; the driving block 92 and the limit block 93 are respectively fixedly connected to the upper and lower end side walls of the driving rod 91, and the driving block 92, the limit block 93 and the driving rod 91 are integrally formed; the driving block 92, the limit block 93 and the driving rod 91 can all slide in the second storage slot 9 in the direction of approaching or moving away from the inner tube 14; the driving block 92 is penetrated through the inner wall of the second storage slot 9 and extends into the through hole 32, and a slope 94 is provided on the driving block 92, and the driving block 92 can abut and cooperate with the side wall of the inner tube 14.

[0058] like Figure 2 As shown, the limit block 93 is penetrated through the inner wall of the second storage groove 9 and extends into the through hole 32. Two limit grooves 95 for the limit block 93 to be inserted are provided on the side wall of the second bolt 51. The two limit grooves 95 are arranged corresponding to the two limit blocks 93. A second spring 96 is arranged in the second storage groove 9. The second spring 96 is arranged along the radial direction of the connecting block 3. One end of the second spring 96 is fixedly connected to the driving rod 91, and the other end of the second spring 96 is fixedly connected to the inner wall of the second storage groove 9 away from the inner tube 14.

[0059] like Figure 2 As shown, before the staff inserts the pipe into the through hole 32, the limit block 93 is inserted into the limit groove 95, and the driving block 92 is located in the through hole 32. Later, when the pipe is inserted into the through hole 32, the side wall of the pipe can push the driving block 92 to move away from the pipe through the inclined surface 94 on the driving block 92. The movement of the driving block 92 can drive the driving rod 91 to overcome the elastic force of the second spring 96 to move. The movement of the driving rod 91 drives the limit block 93 to move. Then, when the limit block 93 moves to a position away from the second bolt 51 After the position is reached, the limiting block 93 can release the limiting effect on the second bolt 51, and then the staff can drive the second bolt 51 and the driving plate 5 to rotate; when the staff removes the pipeline, the elastic force of the second spring 96 can push the driving rod 91 and the limiting block 93 to move toward the direction close to the pipeline. When the limiting block 93 is moved and inserted into the limiting groove 95 on the second bolt 51, the second bolt 51 can be limited, thereby reducing the possibility of the second bolt 51 loosening due to vibration.

[0060] The implementation principle of the embodiment of the present application is: the staff first installs the inner tube liquid inlet box 1, the inner tube liquid outlet box 11, the outer tube liquid inlet box 12 and the outer tube liquid outlet box 13 inside the aircraft engine, and then the staff connects the two ends of the inner tube 14 to the inner tube liquid inlet box 1 and the inner tube liquid outlet box 11 respectively through the first connecting mechanism 16 and the second connecting mechanism 17, and connects the connecting pipes 18 on the two ends of the outer tube 15 to the outer tube liquid inlet box 12 and the outer tube liquid outlet box 13 respectively through the third connecting mechanism 19 and the fourth connecting mechanism 20. The staff can adjust the number of inner tubes 14 and outer tubes 15 according to the size of the internal space of the aircraft engine.

[0061] When the aircraft engine is operating normally, the low-temperature aviation kerosene from the fuel tank will flow into the inner tube inlet tank 1, and flow into the inner tube outlet tank 11 through the inner tube 14, and finally be transported to the combustion chamber, and the combustion efficiency and calorific value of the heated aviation kerosene can be improved; at the same time, the liquid metal carrying heat will flow into the outer tube inlet tank 12, and flow into the outer tube outlet tank 13 through the outer tube 15, and then can flow out from the outer tube outlet tank 13 and flow into the turbine blades; the liquid metal of the outer tube 15 can utilize its own strong heat exchange capacity to, on the one hand, be able to exchange heat with the low-temperature aviation kerosene of the inner tube 14 On the one hand, the warm kerosene undergoes convection heat exchange, and on the other hand, it can undergo convection heat exchange with the outer duct air flowing through the heat exchanger, thereby realizing double heat exchange and further achieving efficient cooling. The cooled liquid metal can cool the turbine blades, and finally the reheated liquid metal can flow into the outer tube liquid inlet tank 12 through the blade cooling circulation system and circulate. Among them, the liquid metal can be gallium and its alloy; thereby, the cooling effect of the high-temperature hot end components with continuously increasing temperature can be improved, thereby improving the safety and service life of the turbine blades.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cooling heat exchanger suitable for aircraft engines, Features: The invention comprises an inner tube liquid inlet box (1), an inner tube liquid outlet box (11), an outer tube liquid inlet box (12), an outer tube liquid outlet box (13), an inner tube (14) and an outer tube (15); the side wall of the inner tube liquid inlet box (1) is provided with a first connecting mechanism (16), and the side wall of the inner tube liquid outlet box (11) is provided with a second connecting mechanism (17); one end of the inner tube (14) is connected to the inner cavity of the inner tube liquid inlet box (1) through the first connecting mechanism (16), and the other end of the inner tube (14) is connected to the inner cavity of the inner tube liquid outlet box (11) through the second connecting mechanism (17); The outer tube (15) is sleeved on the inner tube (14), and both ends of the outer tube (15) are closed. The side walls of both ends of the outer tube (15) are connected with connecting tubes (18). The side wall of the outer tube liquid inlet box (12) is provided with a third connecting mechanism (19), and the side wall of the outer tube liquid outlet box (13) is provided with a fourth connecting mechanism (20); the connecting tube (18) on one end of the outer tube (15) is connected to the inner cavity of the outer tube liquid inlet box (12) through the third connecting mechanism (19), and the connecting tube (18) on the other end of the outer tube (15) is connected to the inner cavity of the outer tube liquid outlet box (13) through the fourth connecting mechanism (20); The first connecting mechanism (16), the second connecting mechanism (17), the third connecting mechanism (19) and the fourth connecting mechanism (20) have the same structure; The first connecting mechanism (16) comprises a connecting block (3), a side wall of the inner tube liquid inlet box (1) is provided with a through hole (31), the connecting block (3) is fixedly connected to the inner wall of the through hole (31), a through hole (32) is provided in the connecting block (3), a first bolt (33) is rotatably connected to the side wall of one end of the inner tube (14), and a first thread groove (34) for threaded connection of the first bolt (33) is provided on the inner wall of one end of the through hole (32); The first connecting mechanism (16) further comprises a driving plate (5), a second bolt (51), a pushing assembly (52) for pushing the driving plate (5) to move, and a rotating assembly (53) for driving the driving plate (5) to rotate; the driving plate (5) and the second bolt (51) slide in the inner cavity of the inner tube liquid inlet box (1), the second bolt (51) is fixedly connected to the driving plate (5), and the inner wall of one end of the through hole (32) located in the inner cavity of the inner tube liquid inlet box (1) is provided with a second thread groove (54) for the second bolt (51) to be threadedly connected; In the process of driving the pipeline to move toward the inner cavity of the box body by rotating the first bolt (33), the driving plate (5) can be driven to rotate by the rotating component (53), and the rotation of the driving plate (5) drives the second bolt (51) to rotate to a position away from the connecting block (3). In the process of moving the pipeline in a direction away from the box body, the second bolt (51) and the driving plate (5) can be driven to rotate by the rotating component (53), and at the same time, the pushing component (52) can push the second bolt (51) and the driving plate (5) to move in a direction close to the connecting block (3).

2. A cooling heat exchanger suitable for an aircraft engine according to claim 1, Features: The first connecting mechanism (16) further comprises a fixing plate (41) and two sealing blocks (42), wherein the fixing plate (41) is fixedly connected to the side wall of one end of the inner tube (14), and the two sealing blocks (42) slide towards or away from each other to fit the side wall of the fixing plate (41); the fixing plate (41) is provided with two first sliding grooves (43), and the two sealing blocks (42) are arranged corresponding to the two first sliding grooves (43); a slider (44) and a first spring (45) are arranged in the first sliding groove (43), and the slider (44) is slidably connected to the inner wall of the first sliding groove (43), and the slider (44) is fixedly connected to the sealing block (42); one end of the first spring (45) abuts against the side wall of the slider (44), and the other end of the first spring (45) abuts against the inner wall of the first sliding groove (43), and the two sealing blocks (42) can abut against the inner wall of the through hole (32).

3. A cooling heat exchanger suitable for an aircraft engine according to claim 1, Features: The pushing assembly (52) comprises a first sleeve (6) and a third bolt (61), one end of the first sleeve (6) being fixedly connected to a side of the driving plate (5) away from the connecting block (3), one end of the third bolt (61) being fixedly connected to an inner wall of the inner tube liquid inlet box (1), and a third thread groove (62) for threaded connection of the third bolt (61) being provided in the first sleeve (6).

4. A cooling heat exchanger suitable for an aircraft engine according to claim 1, Features: The rotating assembly (53) comprises a second sleeve (7), a connecting rod (71) and a guide rod (72); the second sleeve (7) is rotatably connected to the inner wall of the through hole (32); a plurality of spiral grooves (73) are provided on the inner wall of the second sleeve (7); a plurality of spiral blocks (74) are fixedly connected to the side wall of the inner tube (14); the plurality of spiral grooves (73) and the plurality of spiral blocks (74) are arranged correspondingly, and the plurality of spiral blocks (74) are threadedly matched with the plurality of spiral grooves (73); The inner wall of the through hole (32) is provided with a first storage groove (75), and a first gear (76) and a second gear (77) are provided in the first storage groove (75), and the first gear (76) is fixedly connected to the side wall of the second sleeve (7), and the connecting rod (71) is rotatably connected to the inner wall of the connecting block (3), and one end of the connecting rod (71) is passed through the inner wall of the first storage groove (75) and extends into the first storage groove (75), and the second gear (77) is fixedly connected to the side wall of the connecting rod (71), and the second gear (77) is meshed with the first gear (76); The other end of the connecting rod (71) is passed through the inner wall of the connecting block (3) and extends to the inner cavity of the inner tube liquid inlet box (1). A through groove (78) is provided on the side of the connecting rod (71) close to the driving plate (5). A guide groove (79) is provided on the inner wall of the through groove (78). One end of the guide rod (72) slides in the through groove (78). A guide block (80) is fixedly connected to the guide rod (72), and the guide block (80) is slidably connected to the inner wall of the guide groove (79). A sliding hole (81) and a second sliding groove (82) are sequentially provided on one side of the driving plate (5) close to the connecting block (3); the sliding hole (81) is communicated with the second sliding groove (82); one end of the guide rod (72) away from the connecting block (3) is inserted into the sliding hole (81) and the second sliding groove (82); the guide rod (72) is slidably connected to the inner wall of the sliding hole (81); a third gear (83) and a fourth gear (84) are provided in the second sliding groove (82); the third gear (83) is fixedly connected to the inner wall of the second sliding groove (82); the fourth gear (84) is fixedly connected to the side wall of the guide rod (72); the fourth gear (84) is meshed with the third gear (83).

5. A cooling heat exchanger suitable for an aircraft engine according to claim 1, Features: A second storage groove (9) is provided in the connecting block (3), and a driving rod (91), a driving block (92) and a limiting block (93) are provided in the second storage groove (9), and the driving block (92) and the limiting block (93) are respectively fixedly connected to the side walls at both ends of the driving rod (91); the driving block (92) is penetrated through the inner wall of the second storage groove (9) and extends into the through hole (32), and an inclined surface (94) is provided on the driving block (92), and the driving block (92) abuts against the side wall of the inner tube (14); The limit block (93) is penetrated through the inner wall of the second storage groove (9) and extends into the through hole (32); a limit groove (95) for inserting the limit block (93) is opened on the side wall of the second bolt (51); a second spring (96) is arranged in the second storage groove (9); one end of the second spring (96) is fixedly connected to the driving rod (91), and the other end of the second spring (96) is fixedly connected to the inner wall of the second storage groove (9) away from the inner tube (14).

6. A cooling heat exchanger suitable for an aircraft engine according to claim 1, Features: The inner tube (14) and the outer tube (15) are both spiral-shaped.

Images