Structure of small turbojet and assembly equipment thereof

Abstract

The application discloses a small turbojet structure and an assembling device thereof and belongs to the technical field of turbojet engine installation. The device comprises a bearing seat, a centering assembly for clamping an inner lining shaft is installed on the bearing seat, a pressing mechanism is installed on the bearing seat, the pressing mechanism is used for applying pressure close to the axis to the outer circumferential side of the inner lining shaft, a knocking mechanism comprises a sliding frame vertically and slidingly installed on the bearing seat, an impact block is installed on the sliding frame, and a driving assembly acting on the sliding frame is installed on the bearing seat. The driving assembly drives the sliding frame to elastically and reciprocally move, the impact block elastically knocks on the top end of the main shaft when the sliding frame reciprocally moves, the hard resistance generated when the main shaft is impacted can be effectively reduced, the pressing mechanism can avoid the inner lining shaft from deviating when being impacted, the stability during the assembly of the main shaft is improved, and the damage of the main shaft or the impact block caused by excessive stress of the main shaft is avoided.

Description

Technical Field

[0001] This invention relates to the field of turbojet engine installation technology, and in particular to a structure of a small turbojet engine and its assembly equipment. Background Technology

[0002] In the field of aerospace models, target drones, and small unmanned aerial vehicles (UAVs), small turbojet engines are generally used as the main power source.

[0003] For the engine body structure, existing technologies typically design the fuel supply system and bearing lubrication system separately. The fuel pump is responsible for delivering fuel to the combustion chamber, generating power after the fuel is ignited to rotate the main shaft. However, during the rotation of the main shaft, the bearings on the main shaft are located inside the inner bushing, and the main shaft is mounted through the bearings. This method causes the bearings to become stuck under the high speed and high temperature of the main shaft during long-term rotation, requiring periodic application of lubricant to the bearings on the main shaft. However, applying lubricant to the main shaft requires disassembling part of the outer casing of the turbojet engine, exposing both ends of the inner bushing on which the main shaft is mounted, which is very inconvenient to use.

[0004] On the other hand, the performance of a turbojet engine depends on the assembly precision of its core rotating components (such as the main shaft, turbine impeller, and compressor impeller). The main shaft is press-fitted into the inner rings of two precision bearings, forming an interference fit. Traditional assembly methods often rely on operators manually hammering with a copper hammer or using a press. The direction and force of the impact from manual hammering are difficult to control, which can easily cause slight bending of the main shaft, damage to the bearing raceways, or relative misalignment of components, severely disrupting the dynamic balance. Summary of the Invention

[0005] One objective of this invention is to provide a structure for a small turbojet that can solve the problems of inconvenient lubrication of bearings connected to the main shaft in the prior art, as well as the uneven force applied when the main shaft and bearing are installed on the inner liner shaft, which easily causes main shaft wear.

[0006] Another object of the present invention is to provide an assembly device for assembling the above-mentioned small turbojet structure.

[0007] A small turbojet structure includes a mounting housing and an inner liner shaft coaxially mounted thereon. A main shaft is rotatably mounted at both ends of the inner liner shaft via bearings. A drive motor is installed inside the mounting housing near an opening on one side. The output shaft of the drive motor is connected to the main shaft. An impeller is rotatably mounted on the main shaft. A turbocharger is installed inside the mounting housing, located on one side of the impeller. The mounting housing has a combustion chamber. It also includes an ignition assembly, an oil inlet assembly, and a lubrication assembly mounted on the mounting housing. When the oil inlet assembly supplies oil to the combustion chamber, the lubrication assembly lubricates the bearings at both ends of the inner liner shaft.

[0008] Furthermore, the oil inlet assembly includes a pump motor with two oil outlets. One oil outlet is connected to an ignition oil supply pipe, one end of which is connected to an ignition assembly located in the combustion chamber. The other oil outlet is connected to an oil outlet pipe. The turbocharger is equipped with an oil circuit pressure plate, and the turbocharger and the oil circuit pressure plate form an annular oil sealing chamber. The oil circuit pressure plate is connected to multiple oil mist spray pipes that communicate with the oil sealing chamber.

[0009] Furthermore, the lubrication assembly includes a first oil supply pipe and a second oil supply pipe connected to the oil circuit pressure plate and communicating with the oil sealing chamber. One end of the first oil supply pipe and the second oil supply pipe are respectively connected to a position near the end of the inner liner shaft and communicate with the mounting groove of the corresponding bearing.

[0010] A small turbojet assembly device for assembling the aforementioned small turbojet structure, comprising:

[0011] A support base on which a centering assembly for clamping the inner liner shaft is mounted;

[0012] A pressing mechanism is mounted on the bearing seat, and pressure close to the axis is applied to the outer peripheral side of the inner liner shaft by means of the pressing mechanism;

[0013] The striking mechanism includes a sliding frame vertically slidably mounted on the support, an impact block mounted on the sliding frame, and a driving component acting on the sliding frame mounted on the support. The driving component drives the sliding frame to slide elastically, causing the impact block to elastically strike one end of the main shaft.

[0014] Furthermore, the holding mechanism includes multiple air intake plates symmetrically mounted on the support seat, multiple air intake cylinders are mounted in a circular array on the air intake plates, and a push rod facing the axis of the inner liner is slidably inserted into one end of each air intake cylinder. A pneumatic component for supplying high-pressure gas to the multiple air intake plates is mounted on the support seat.

[0015] Furthermore, a connecting cylinder is installed at the free end of the push rod, and a connecting frame is installed at one end of the connecting cylinder. The connecting frame is rotatably mounted with a first pressure plate and a second pressure plate via a shaft. A drive plate is elastically slidably inserted into one end of the connecting cylinder. Two hinge plates are hinged to the free end of the drive plate, and the two hinge plates are respectively hinged to the first pressure plate and the second pressure plate.

[0016] Furthermore, the drive assembly includes two movable plates that are symmetrically and vertically slidably mounted on the support base. The bottom of the sliding frame has two symmetrical sliding grooves, and the two movable plates are respectively slidably inserted into the two sliding grooves. A connecting spring is installed between the movable plates and the sliding grooves, and a transmission assembly for driving the movable plates to reciprocate is installed on the support base.

[0017] Furthermore, the transmission assembly includes two rotating disks rotatably mounted on the support base, with a column rod eccentrically constructed between the two rotating disks. A docking frame is vertically slidably mounted on the support base, and a movable groove for the column rod to move inside is horizontally opened on the docking frame. Positioning bolts are symmetrically threaded into the docking frame, and a positioning hole for the positioning bolts to be inserted is opened on one side of the moving plate.

[0018] Furthermore, a mounting bracket is rotatably mounted on the bearing seat, and a connecting sleeve is vertically mounted on one end of the mounting bracket. A movable punch with an inverted frustum-shaped bottom is vertically inserted into the connecting sleeve, and the movable punch is coaxial with the inner lining shaft.

[0019] Furthermore, a through hole is provided at the bottom plane of the movable punch, the inner diameter of the through hole is larger than the diameter of the end of the main shaft, and a long rod is slidably installed inside the movable punch to block the through hole. A tightening sleeve is screwed into the top of the long rod. When the tightening sleeve is tightened, the bottom end of the long rod is flush with the bottom surface of the movable punch, and the impact block has a hole for the long rod to pass through.

[0020] Beneficial effects:

[0021] This invention drives the sliding frame to move elastically back and forth through a drive component. When the sliding frame moves back and forth, the impact block will elastically strike the top of the spindle, which can effectively reduce the hard resistance generated when impacting the spindle. In addition, the holding mechanism can prevent the inner liner shaft from shifting during impact. This not only improves the stability when assembling the spindle, but also prevents the spindle or impact block from being damaged due to excessive force. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the turbojet engine of the present invention;

[0023] Figure 2 For the present invention Figure 1 Partial three-dimensional sectional view;

[0024] Figure 3 For the present invention Figure 1 Another partial sectional view;

[0025] Figure 4 For the present invention Figure 1 Partial structural diagram;

[0026] Figure 5 For the present invention Figure 1 Partial structural breakdown diagram;

[0027] Figure 6 This is a three-dimensional structural diagram of the inner liner shaft assembly equipment of the present invention;

[0028] Figure 7 For the present invention Figure 6 Another perspective illustration;

[0029] Figure 8 For the present invention Figure 6 Partial three-dimensional sectional view;

[0030] Figure 9 For the present invention Figure 1 Another partial three-dimensional sectional view;

[0031] Figure 10 For the present invention Figure 1 Another partial sectional view;

[0032] Figure 11 For the present invention Figure 8 Enlarged view of the structure at point A in the middle;

[0033] Figure 12 For the present invention Figure 9 Enlarged view of the structure at point B in the middle;

[0034] Figure 13 This is a diagram showing another clamping state of the inner liner shaft.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Mounting housing; 2. Drive motor; 3. Impeller; 4. Inner liner shaft; 5. Main shaft; 6. Intensifier; 7. Ignition assembly; 8. Oil inlet assembly; 801. Pump motor; 802. Ignition oil supply pipe; 803. Oil outlet pipe; 804. Oil circuit pressure plate; 805. Oil sealing chamber; 806. Oil mist spray pipe; 9. Lubrication assembly; 901. First oil supply pipe; 902. Second oil supply pipe; 10. Bearing seat; 11. Centering assembly; 12. Pressing mechanism; 1201. Air inlet plate; 1202. Air inlet cylinder; 1203. Push rod; 1204. Pneumatic component; 13. Striking mechanism; 1301. Sliding frame; 1302. Impact block; 1303. Drive assembly; 13031. Moving... 13032. Moving plate; 13033. Sliding groove; 13034. Connecting spring; 15. Connecting cylinder; 16. Connecting frame; 17. First pressure plate; 18. Second pressure plate; 19. Hinge plate; 20. Drive plate; 20. Transmission assembly; 2001. Rotating disk; 2002. Column rod; 2003. Docking frame; 2004. Positioning bolt; 2005. Positioning hole; 2006. Movable groove; 21. Tightening sleeve; 22. Combustion chamber; 23. Mounting bracket; 24. Connecting sleeve; 25. Movable punch; 26. Through hole; 27. Long rod; 28. V-shaped clamp; 29. ​​Double-acting screw; 30. Through hole; 31. Air pump; 32. Connecting cavity; 33. Air pipe; 34. Working impeller. Detailed Implementation

[0037] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0038] like Figures 1 to 5 As shown, a small turbojet engine structure includes a mounting housing 1 and an inner bushing shaft 4 coaxially mounted thereon. A main shaft 5 is rotatably mounted at both ends of the inner bushing shaft 4 via bearings. A drive motor 2 is installed inside the mounting housing 1 near an opening on one side. The output shaft of the drive motor 2 is connected to the main shaft 5. An impeller 3 is rotatably mounted on the main shaft 5. A turbocharger 6 is installed inside the mounting housing 1, located on one side of the impeller 3. The mounting housing 1 has a combustion chamber 22. It also includes an ignition assembly 7, an oil inlet assembly 8, and a lubrication assembly 9 mounted on the mounting housing 1. When the oil inlet assembly 8 supplies oil to the combustion chamber 22, the lubrication assembly 9 lubricates the bearings at both ends of the inner bushing shaft 4. In other words, during operation, the drive motor 2 drives the main shaft 5 to rotate, which in turn drives the impeller 3 to rotate, thereby delivering outside air to the turbocharger 6. The turbocharger 6 is a conventional structure found in existing small turbojet engines. After passing through the turbocharger 6, the air becomes high-pressure air and enters the combustion chamber. Inside combustion chamber 22, fuel inlet assembly 8 continuously supplies fuel to combustion chamber 22 and ignites it through ignition assembly 7 to generate power. Finally, the fuel is ejected from the other end of mounting housing 1. It should be noted that in the prior art, the output shafts of drive motor 2 are magnetically connected through permanent magnet couplings, and a working impeller 34 is installed at the end of main shaft 5 away from impeller 3. When fuel burns in combustion chamber 22, the power generated forces working impeller 34 to rotate at high speed. Since impeller 3 is mounted on main shaft 5, it also rotates at high speed, thereby improving the effect of air entering combustion chamber 22. At this time, drive motor 2 can be turned off, and only fuel needs to be supplied to achieve the rotation of impeller 3. During this process, lubrication assembly 9 continuously lubricates the two bearings inside inner liner shaft 4, thereby effectively ensuring the lubrication effect of the bearings. This not only reduces the frequency of manual lubrication, but also eliminates the need to disassemble mounting housing 1 during lubrication, reducing the number of times mounting housing 1 needs to be disassembled and reassembled, making it convenient to use.

[0039] like Figures 1 to 4As shown, in some embodiments, the oil inlet assembly 8 includes a pump motor 801 with two oil outlets. One oil outlet is connected to an ignition oil supply pipe 802, one end of which is connected to an ignition assembly 7 located within the combustion chamber 22. The other oil outlet is connected to an oil outlet pipe 803. The turbocharger 6 is equipped with an oil circuit pressure plate 804, forming an annular oil sealing chamber 805 with the turbocharger 6 and the oil circuit pressure plate 804. Multiple oil mist spray pipes communicating with the oil sealing chamber 805 are connected to the oil circuit pressure plate 804. 806, that is, fuel is delivered to the ignition fuel supply pipe 802 and the fuel outlet pipe 803 by the pump motor 801. After entering the ignition fuel supply pipe 802, the fuel enters the ignition assembly 7, where a flame is generated. At the same time, the fuel outlet pipe 803 delivers fuel to the fuel sealing chamber 805, so that multiple fuel mist nozzles 806 spray atomized fuel, which, together with the flame generated by the ignition assembly 7, is fully combusted in the combustion chamber, improving the fuel combustion effect. It should be noted that the ignition assembly 7 is the ignition structure in existing turbojet engines, such as a spark plug.

[0040] like Figures 1 to 4 As shown, in some embodiments, the lubrication assembly 9 includes a first oil supply pipe 901 and a second oil supply pipe 902 connected to the oil circuit pressure plate 804 and communicating with the oil sealing chamber 805. One end of the first oil supply pipe 901 and the second oil supply pipe 902 are respectively connected to a position near the end of the inner liner shaft 4 and communicate with the mounting groove of the corresponding bearing. That is, when the pump motor 801 delivers fuel to the oil sealing chamber 805 during use, some fuel will enter the first oil supply pipe 901 and the second oil supply pipe 902, so that the first oil supply pipe 901 and the second oil supply pipe 902 respectively supply oil to the two bearings to achieve lubrication of the bearings. No additional oil supply system is needed to complete the lubrication of the bearings. It should be noted that the lubrication effect of directly using fuel to lubricate the bearings is not as good as the lubrication effect brought by directly using lubricating fluid or grease. The lubrication effect of fuel on the bearings is mainly to reduce the frequency of manual lubrication.

[0041] like Figures 6 to 13 As shown, a small turbojet assembly device is used to assemble the aforementioned small turbojet structure, comprising:

[0042] The support 10 is equipped with a centering component 11 for clamping the inner liner shaft 4;

[0043] A pressing mechanism 12 is installed on the bearing seat 10, and pressure close to the axis is applied to the outer peripheral side of the inner liner shaft 4 by means of the pressing mechanism 12;

[0044] The striking mechanism 13 includes a sliding frame 1301 vertically slidably mounted on the support 10. An impact block 1302 is mounted on the sliding frame 1301. A driving assembly 1303 acting on the sliding frame 1301 is mounted on the support 10. The driving assembly 1303 drives the sliding frame 1301 to slide elastically, causing the impact block 1302 to elastically strike one end of the main shaft 5. This application does not specifically limit the structure of the centering assembly 11; it can be any clamping structure capable of centrally clamping the inner liner shaft 4. For example, a V-shaped clamping plate 28 symmetrically rotated on the worktable of the support 10. A bidirectional screw 29 is horizontally and rotatably mounted on the support 10. The bidirectional screw 29 has left-hand and right-hand threads. When the bidirectional screw 29 is rotated, the two V-shaped clamping plates 28 move closer together, thereby radially centering the upright inner liner shaft 4. When assembling the main shaft 5, one of the bearings is first installed at one end of the inner liner shaft 4 (e.g., ...). Figure 1As shown), the end with the bearing installed is then brought into contact with the worktable surface of the support seat 10. Preferably, the worktable surface of the support seat 10 has a through hole 30 for the subsequent spindle 5 to pass through. The upright inner liner 4 is clamped by the centering component 11 so that the inner liner 4 is coaxial with the through hole 30. Then the spindle 5 is vertically passed through the top of the inner liner 4 and inserted into the bearing below. During this process, a bearing has been installed on the spindle 5 near the top.The bottom end of the main spindle 5 passes directly through the through hole 30 to avoid interference. Then, another bearing is fitted from the top of the main spindle 5 and inserted into the top of the inner bushing 4. Currently, the main spindle 5 and the top bearing are not yet installed. At this point, the inner bushing 4 is radially pressed along its outer periphery by the pressing mechanism 12, and pressure is applied close to the axis to ensure the stability of the inner bushing 4. Subsequently, the drive assembly 1303 drives the sliding frame 1301 to reciprocate elastically. During this reciprocating movement, the impact block 1302 elastically strikes the top of the main spindle 5. In this embodiment, the impact block 1302 is made of copper to prevent wear on the top of the main spindle 5. Furthermore, the elastic impact design of the impact block 1302 effectively reduces the impact on the main spindle 5. The rigid contact not only improves the stability during the assembly of the spindle 5, but also prevents excessive force on the spindle 5, which could damage the spindle 5 or the impact block 1302. In other embodiments, a mounting bracket 23 is rotatably mounted on the bearing seat 10. A connecting sleeve 24 is vertically mounted on one end of the mounting bracket 23. A movable punch 25 with an inverted truncated cone shape at the bottom is vertically inserted into the connecting sleeve 24. The movable punch 25 is coaxial with the inner liner shaft 4. The inverted truncated cone shape design makes the force on the spindle 5 more concentrated, improving the impact effect. The movable punch 25 is made of copper, which can prevent excessive hardness from damaging the spindle 5. The bottom end of the movable punch 25 contacts the top of the spindle 5, and the impact block 1302 is made of 45# steel. The impact block 1302 is straight. The impact of the movable punch 25 transmits force to the top of the main shaft 5, and avoids the impact block 1302 directly impacting the main shaft 5, which would cause uneven force distribution and effectively improve the impact effect. After the main shaft 5 is installed with the lower bearing due to the impact of the impact block 1302, the upper bearing may become loose due to the impact and the inner bushing 4, resulting in failure to be installed in place. Preferably, a through hole 26 is provided at the bottom plane of the movable punch 25. The inner diameter of the through hole 26 is larger than the end diameter of the main shaft 5. A long rod 27 is slidably installed in the movable punch 25 to block the through hole 26. A tightening sleeve 21 is screwed into the top of the long rod 27. When the tightening sleeve 21 is tightened, the bottom end of the long rod 27 and the movable punch 25 are connected. 5. The bottom surface is flat, and the impact block 1302 has a hole for the long rod 27 to pass through. After the main shaft 5 is installed, the movable punch 25 is unscrewed. Under the action of gravity, the bottom end of the movable punch 25 will directly contact the upper bearing. When the impact block 1302 impacts the movable punch 25, the movable punch 25 directly applies force to the upper bearing, while the long rod 27 is lifted by the top of the main shaft 5, so that it partially passes through the hole on the impact block 1302. In this way, when the impact block 1302 impacts the movable punch 25, the long rod 27 will not be subjected to force, thereby achieving a fastening impact on the upper bearing. Preferably, when the lower bearing needs to be installed at the beginning, the inner bushing shaft 4 can be directly reversed (e.g., inverted). Figure 13As shown, the bearing is directly hammered into the inner bushing shaft 4 using the movable punch 25 (at this time, the sleeve 21 is tightened and disassembled). Compared with the existing technology of directly hammering with a nylon hammer, this assembly method is more stable and convenient.

[0045] like Figures 6 to 12 As shown, in some embodiments, the pressing mechanism 12 includes a plurality of air inlet plates 1201 symmetrically mounted on the support 10. A plurality of air inlet cylinders 1202 are mounted in a circular array on the air inlet plates 1201. One end of each air inlet cylinder 1202 is slidably fitted with a push rod 1203 facing the axis of the inner liner shaft 4. A pneumatic component 1204 for providing high-pressure gas to the plurality of air inlet plates 1201 is mounted on the support 10. This application does not specifically limit the pneumatic component 1204; it can be any pneumatic structure capable of providing high-pressure gas to the air inlet plates 1201, such as an air pump 31. Preferably, in this embodiment, a connecting cavity 32 is provided on the support 10 to allow communication between the plurality of air inlet plates 1201. The air pump 31 is directly connected to the support 10 via an air pipe 33. The connecting cavity 32 is connected, so there is no need to use multiple air pumps 31 to supply air pressure to the high-pressure gas separately, and the air pressure inside the multiple air inlet plates 1201 is balanced. When high-pressure gas is applied to the air inlet plate 1201, air pressure will also be generated in the air inlet cylinder 1202, thereby forcing the push rod 1203 to abut against the outer circumference of the inner liner shaft 4. The multiple push rods 1203 abutting against the outer circumference of the inner liner shaft 4 not only ensures the centering of the inner liner shaft 4, but also makes the force application more stable. Preferably, a spring is installed between the air inlet cylinder 1202 and the push rod 1203. When the air pump 31 does not supply high-pressure gas to the air inlet plate 1201, the spring will cause the push rod 1203 to retract into the corresponding air cylinder, thereby facilitating the subsequent removal of the installed inner liner shaft 4 from the support seat 10.

[0046] like Figure 12As shown, to further increase the contact area with the inner liner shaft 4 and improve stability, a connecting cylinder 14 is installed at the free end of the push rod 1203. A connecting frame 15 is installed at one end of the connecting cylinder 14. A first pressure plate 16 and a second pressure plate 17 are rotatably mounted on the connecting frame 15 via a shaft. A drive plate 19 is elastically slidably inserted into one end of the connecting cylinder 14. Preferably, a spring sheet is installed between the connecting cylinder 14 and the drive plate 19. Two hinge plates 18 are hinged to the free end of the drive plate 19. The two hinge plates 18 are respectively hinged to the first pressure plate 16 and the second pressure plate 17. On plate 17, that is, when the push rod 1203 extends, the first pressure plate 16 and the second pressure plate 17 will adaptively fit against the inner liner shaft 4 to form a V-shape. Since the first pressure plate 16 and the second pressure plate 17 are both hinged to the drive plate 19, the drive plate 19 will move. The design of the spring ensures that under normal conditions, the first pressure plate 16 and the second pressure plate 17 maintain a certain angle, ensuring that the contact surfaces of the first pressure plate 16 and the second pressure plate 17 can fit against the inner liner shaft 4. It can also adaptively adjust the included angle according to the outer diameter of the installed inner liner shaft 4, thus improving applicability.

[0047] like Figure 8 As shown, in some embodiments, the drive assembly 1303 includes two movable plates 13031 symmetrically and vertically slidably mounted on the support 10. Two sliding grooves 13032 are symmetrically formed at the bottom of the sliding frame 1301. The two movable plates 13031 are slidably inserted into the two sliding grooves 13032 respectively. A connecting spring 13033 is installed between the movable plates 13031 and the sliding grooves 13032. A transmission assembly 20 for driving the movable plates 13031 to reciprocate is mounted on the support 10. That is, the transmission assembly 20 can drive the movable plates 13031 to move back and forth. As the moving plate 13031 moves upward, it compresses the connecting spring 13033, causing the connecting spring 13033 to be in a semi-compressed state. When the moving plate 13031 moves downward, the connecting spring 13033 is stretched. Because the connecting spring 13033 is connected to the sliding groove 13032, the connecting spring 13033 pulls the sliding frame 1301 downward, thereby causing the impact block 1302 to strike the movable punch 25, achieving elastic impact. It should be noted that the connecting spring 13033 can withstand the weight of the sliding frame 1301 without deformation under normal conditions.

[0048] like Figure 8As shown, in some embodiments, the transmission assembly 20 includes two rotating disks 2001 rotatably mounted on the support 10, with a column 2002 eccentrically positioned between the two rotating disks 2001. A docking frame 2003 is vertically slidably mounted on the support 10. The docking frame 2003 has a horizontally opening movable groove 2006 for the column 2002 to move inside. Positioning bolts 2004 are symmetrically threaded into the docking frame 2003. A positioning hole 2005 for the positioning bolts 2004 to be inserted is opened on one side of the moving plate 13031. Preferably, a motor is mounted on the support 10, and the motor is coaxially connected to one of the rotating disks 2001. When the rotating disk 2001 rotates, it drives the column rod 2002 to rotate. When the column rod 2002 rotates, it drives another rotating disk 2001 to rotate. At this time, the column rod 2002 is in an eccentric rotation state. Because the column rod 2002 is located in the movable groove 2006, when the column rod 2002 rotates eccentrically, it will cause the column rod 2002 to move within the movable groove 2006, thereby forcing the docking frame 2003 to move back and forth. Because the docking frame 2003 is connected to the moving plate 13031, it will drive the moving plate 13031 to move back and forth, ensuring the stability of the moving plate 13031 during movement. The docking frame 2003 and the moving plate 13031 are detachably connected for easy subsequent maintenance.

[0049] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A structure for a small turbojet, characterized in that, The device includes a mounting housing (1) and an inner liner shaft (4) coaxially mounted thereon. The inner liner shaft (4) has a main shaft (5) rotatably mounted at both ends via bearings. A drive motor (2) is installed inside the mounting housing (1) near one of its openings. The output shaft of the drive motor (2) is connected to the main shaft (5). An impeller (3) is rotatably mounted on the main shaft (5). A turbocharger (6) located on one side of the impeller (3) is installed inside the mounting housing (1). The mounting housing (1) has a combustion chamber (22). The device also includes an ignition assembly (7), an oil inlet assembly (8), and a lubrication assembly (9) mounted on the mounting housing (1). When the oil inlet assembly (8) supplies oil to the combustion chamber (22), the lubrication assembly (9) lubricates the bearings at both ends of the inner liner shaft (4). The oil inlet assembly (8) includes a pump motor (801), which has two oil outlets. One oil outlet is connected to an ignition oil supply pipe (802), one end of which is connected to an ignition assembly (7). The ignition assembly (7) is located in the combustion chamber (22). The other oil outlet is connected to an oil outlet pipe (803). The turbocharger (6) is equipped with an oil circuit pressure plate (804). The turbocharger (6) and the oil circuit pressure plate (804) form an annular oil sealing chamber (805). The oil circuit pressure plate (804) is connected to multiple oil mist spray pipes (806) that communicate with the oil sealing chamber (805).

2. The structure of a small turbojet as described in claim 1, characterized in that, The lubrication assembly (9) includes a first oil supply pipe (901) and a second oil supply pipe (902) connected to the oil circuit pressure plate (804) and communicating with the oil sealing cavity (805). One end of the first oil supply pipe (901) and the second oil supply pipe (902) are respectively connected to the inner liner shaft (4) near its end and communicate with the mounting groove of the corresponding bearing.

3. A small-scale turbojet assembly device, characterized in that, For assembling a small turbojet structure as described in any one of claims 1-2, comprising: A support (10) is provided, on which a centering assembly (11) for clamping the inner liner shaft (4) is mounted. A pressing mechanism (12) is mounted on the bearing seat (10) to apply pressure close to the axis to the outer periphery of the inner liner shaft (4); The striking mechanism (13) includes a sliding frame (1301) that is vertically slidably mounted on the support (10). An impact block (1302) is mounted on the sliding frame (1301). A driving assembly (1303) that acts on the sliding frame (1301) is mounted on the support (10). The driving assembly (1303) drives the sliding frame (1301) to slide elastically, so that the impact block (1302) elastically strikes one end of the main shaft (5).

4. The small turbojet assembly equipment as described in claim 3, characterized in that, The holding mechanism (12) includes a plurality of air inlet plates (1201) symmetrically mounted on the support (10). A plurality of air inlet cylinders (1202) are mounted in a circular array on the air inlet plates (1201). A push rod (1203) facing the axis of the inner liner shaft (4) is slidably inserted into one end of the air inlet cylinder (1202). A pneumatic component (1204) for supplying high-pressure gas into the plurality of air inlet plates (1201) is mounted on the support (10).

5. A small turbojet assembly device as described in claim 4, characterized in that, The free end of the push rod (1203) is equipped with a connecting cylinder (14), and a connecting frame (15) is installed at one end of the connecting cylinder (14). The connecting frame (15) is rotatably equipped with a first pressure plate (16) and a second pressure plate (17) via a shaft. A drive plate (19) is elastically slidably inserted at one end of the connecting cylinder (14). The free end of the drive plate (19) is hinged with two hinge plates (18), which are respectively hinged to the first pressure plate (16) and the second pressure plate (17).

6. The small turbojet assembly equipment as described in claim 5, characterized in that, The drive assembly (1303) includes two movable plates (13031) that are symmetrically and vertically slidably mounted on the support (10). The bottom of the sliding frame (1301) has two symmetrical sliding grooves (13032). The two movable plates (13031) are respectively slidably inserted into the two sliding grooves (13032). A connecting spring (13033) is installed between the movable plate (13031) and the sliding groove (13032). A transmission assembly (20) for driving the movable plates (13031) to reciprocate is installed on the support (10).

7. A small turbojet assembly device as described in claim 6, characterized in that, The transmission assembly (20) includes two rotating disks (2001) rotatably mounted on the support (10), with a column (2002) eccentrically constructed between the two rotating disks (2001). A docking frame (2003) is vertically slidably mounted on the support (10). A movable groove (2006) for the column (2002) to move inside is horizontally opened on the docking frame (2003). A positioning bolt (2004) is symmetrically threaded into the docking frame (2003). A positioning hole (2005) for the positioning bolt (2004) to be inserted is opened on one side of the moving plate (13031).

8. The small turbojet assembly equipment as described in claim 7, characterized in that, A mounting bracket (23) is rotatably mounted on the bearing seat (10). A connecting sleeve (24) is vertically mounted on one end of the mounting bracket (23). A movable punch (25) with an inverted truncated cone shape at the bottom is vertically inserted into the connecting sleeve (24). The movable punch (25) is coaxial with the inner lining shaft (4).

9. A small turbojet assembly device as described in claim 8, characterized in that, The movable punch (25) has a through hole (26) at the bottom plane. The inner diameter of the through hole (26) is larger than the end diameter of the main shaft (5). A long rod (27) that blocks the through hole (26) is slidably installed inside the movable punch (25). A tightening sleeve (21) is screwed into the top of the long rod (27). When the tightening sleeve (21) is tightened, the bottom end of the long rod (27) is flush with the bottom surface of the movable punch (25). The impact block (1302) has a hole through which the long rod (27) passes.

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