Core engine unit installation tool and its usage method

Abstract

The present invention discloses a core unit installation tool and its usage method. The core unit installation tool includes an axial limiting mechanism, a radial limiting mechanism, and a driving member connecting the axial limiting mechanism and the radial limiting mechanism. The axial limiting mechanism and the radial limiting mechanism can be switched between a release position located radially inside and a locking position located radially outside under the drive of the driving member. The axial limiting mechanism includes a limiting structure that can achieve axial blocking and limiting when it is in the locking position. This core unit installation tool can achieve one-step axial positioning and radial pressing of the core unit, and realize the installation and fixation with the core unit in a short time, meeting the requirements for assembly time.

Description

Technical Field

[0001] The present invention relates to the field of aero - engines, and particularly to a core unit installation tool and its usage method. Background Art

[0002] During the assembly process of an aero - engine, when the core unit and the fan unit are butted and installed in a horizontal state, due to the large weight and long length of the core unit body, when directly butting with a sling, there are the following butting risks:

[0003] 1. Since the driving bevel gear in the fan unit body is a hot - fitted part, the entire butting process needs to be completed within a certain time, requiring the installation tool to be quickly installed and quickly disassembled, while the existing installation tools cannot meet the requirements of quick loading and unloading.

[0004] 2. The front journal in the core unit may collide with the driving bevel gear in the fan unit, resulting in the scrapping of the engine.

[0005] 3. The entire process depends entirely on manual operation by workers. It is difficult to ensure the parallelism between the axis of the core unit body and the axis of the fan unit body. The butting risk is closely related to the experience and operation state of the workers, and the stability is poor. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the prior art, such as cumbersome loading and unloading, possible collision between the fan unit body and the core unit during butting, and difficulty in ensuring the parallelism between the axis of the core unit body and the axis of the fan unit body, and to provide a core unit installation tool and its usage method.

[0007] The present invention solves the technical problem in the following way:

[0008] A core unit installation tool includes an axial limiting mechanism, a radial limiting mechanism, and a driving member connecting the axial limiting mechanism and the radial limiting mechanism. The axial limiting mechanism and the radial limiting mechanism can be switched between a release position located radially inside and a locking position located radially outside under the drive of the driving member. The axial limiting mechanism includes a limiting portion that can achieve axial blocking and limiting when it is in the locking position.

[0009] This installation tool can achieve the axial positioning and radial pressing of the core unit in one step, and realize the installation and fixation of the core unit in a short time, meeting the requirements for the assembly time.

[0010] Preferably, the axial limiting mechanism includes an axial limiting member and a first trajectory control disk connecting the driving member and the axial limiting member, and the radial limiting mechanism includes a radial limiting member and a second trajectory control disk connecting the driving member and the radial limiting member. The first trajectory control disk and the second trajectory control disk can rotate under the drive of the driving member, thereby driving the axial limiting member and the radial limiting member to expand and contract synchronously in the radial direction.

[0011] Preferably, the limiting portion is a groove extending in the radial direction provided on the axial limiting member. This groove can be stuck on the journal, and the axial movement of the journal is restricted by the groove.

[0012] Preferably, a pressure sensor is provided on the outer wall of the radial limiting member to output the pressing force data to the operator, so as to avoid the failure of tool parts or core machine parts caused by insecure fixation or excessive pressing force.

[0013] Preferably, the first trajectory control disk has a first guide groove, and the axial limiting member can be switched between the loosening position and the locking position under the guidance of the first guide groove. The second trajectory control disk is provided with a second guide groove, and the radial limiting member can be switched between the loosening position and the locking position under the guidance of the second guide groove.

[0014] Preferably, the first guide groove obliquely extends from the radial inner side to the radial outer side of the first trajectory control disk, and the second guide groove obliquely extends from the radial inner side to the radial outer side of the second trajectory control disk.

[0015] Preferably, there are two second trajectory control disks in total, and both ends of the radial limiting member are respectively slidably arranged in the second guide grooves of the two second trajectory control disks. Adopting such a structure can effectively avoid the problem of jamming of the radial limiting member during operation.

[0016] Preferably, the included angle between the starting end located on the radial inner side and the ending end located on the radial outer side of the first guide groove relative to the center of the first trajectory control disk is the same as the included angle between the starting end located on the radial inner side and the ending end located on the radial outer side of the second guide groove relative to the center of the second trajectory control disk. Adopting such a structure can enable the first trajectory control disk and the second trajectory control disk to drive the axial limiting member and the radial limiting member to synchronously switch between the locking position and the loosening position when rotating through the same angle, and can avoid the situation where one of them is in the locking position while the other has not reached the locking position, which is beneficial to improving the locking performance.

[0017] Preferably, the radial distance between the starting end and the ending end of the first guide groove is greater than the radial distance between the starting end and the ending end of the second guide groove. Correspondingly, the movement stroke of the axial limiting member is greater than the stroke of the radial limiting member, which can better adapt to the structure of the core machine unit.

[0018] Preferably, the core unit installation tool further includes a guide shaft connecting the radial limiting mechanism and a guide member fixed to the fan unit to be installed. A guide hole adapted to the guide shaft is provided on the guide member. During use, the guide shaft penetrates into the guide hole, and the connection between the core unit and the fan unit is achieved under the guidance of the guide shaft.

[0019] Preferably, the core unit installation tool further includes an identification member provided on the driving member and a reference member connected to the core unit for aligning the identification member. During assembly, the driving member connecting the axial limiting mechanism is inserted into the shaft hole until the reference member aligns with the identification member. At this time, the axial limiting member is in the theoretical working position, that is, the position aligning with the journal. At this time, the groove of the axial limiting member can accurately limit the journal.

[0020] Preferably, the identification member includes a reference axis provided on the driving member, and a baseline is provided on the reference axis. The reference member includes a conduit through which the driving member passes, and a marking line for aligning the baseline is provided on the conduit.

[0021] Preferably, a long hole extending axially is provided on the conduit, the marking line intersects with the long hole, and the reference axis can be placed in the long hole. So that the operator can visually align the baseline and the marking line.

[0022] Preferably, multiple baselines are circumferentially and equally distributed on the end face of the reference axis to facilitate adjusting the baseline to a position parallel to the marking line.

[0023] Preferably, the driving member includes a driving shaft connecting the axial limiting mechanism and the radial limiting mechanism and a driving device capable of driving the driving shaft to rotate.

[0024] Preferably, the driving member further includes a protective sleeve sleeved outside the driving shaft. The protective sleeve can prevent the driving shaft and the components inside the shaft hole from being knocked against each other.

[0025] Preferably, the driving device includes a turntable connected to the driving shaft, and a handle is provided on the outer peripheral surface of the turntable.

[0026] Preferably, the driving device further includes a rotation limiting structure. The rotation limiting structure includes a pin hole provided on the end face of the protective sleeve sleeved outside the driving shaft and a positioning hole provided on the turntable. The pin hole and the positioning hole can coincide when the radial limiting mechanism and the axial limiting mechanism are in the locked position. During use, a positioning pin is used in the positioning hole and the pin hole so that the axial limiting mechanism and the radial limiting mechanism can always lock the core unit.

[0027] A method for using an installation tool for a core unit, which is used for the installation tool for the core unit as described above, is characterized by including the following steps:

[0028] S10: Connect the guide shaft, radial limiting mechanism, axial limiting mechanism, and driving member together and extend them into the shaft hole of the core unit;

[0029] S20: Drive the radial limiting mechanism and axial limiting mechanism to run to the locking position through the driving member to lock the core unit;

[0030] S30: Install a guiding member on the fan unit to be installed, make the guide shaft pass through the guiding hole on the guiding member, and dock and install the fan unit and the core unit under the guidance of the guide shaft.

[0031] Preferably, before S20, there is also step S21:

[0032] When the identification member on the driving member is aligned with the reference member connecting the core unit, drive the radial limiting mechanism and axial limiting mechanism to run to the locking position through the driving member.

[0033] Preferably, after S20, there is step S22:

[0034] Limit the rotation of the driving member through the rotation limiting structure.

[0035] The positive and progressive effects of the present invention are as follows:

[0036] 1. Axial limiting and radial limiting can be achieved in one step, and the fixation with the core unit body can be realized in a short time.

[0037] 2. The track shapes of the first track control disk and the second track control disk are different, and synchronous expansion and contraction with different amplitudes and different speeds can be realized.

[0038] 3. The radial limiting member is configured with a pressure sensor, which can timely feedback the pressing force, and avoid the failure of tool parts or core machine parts caused by insecure fixation or excessive pressing force.

[0039] 4. Using two second track control disks to control the expansion and contraction of the radial limiting member can avoid the movement jamming of the radial limiting member.

[0040] 5. The driving member is provided with an identification member for alignment with the reference member, which can assist the operator to quickly and accurately perform axial positioning. Description of the Drawings

[0041] Figure 1 It is an assembly view of the core unit and the fan unit;

[0042] Figure 2 It is an assembly view of the installation tool;

[0043] Figure 3 Cross-sectional view of the axial limiting mechanism;

[0044] Figure 4 Side view of the axial limiting mechanism;

[0045] Figure 5 Cross-sectional view of the radial limiting mechanism;

[0046] Figure 6 Side view of the radial limiting mechanism;

[0047] Figure 7 Side view of the main disk;

[0048] Figure 8 Side view of the slave disk;

[0049] Figure 9 Cross-sectional view of the driving part;

[0050] Figure 10 Side view of the driving part;

[0051] Figure 11 Assembly view between the driving part and the reference part;

[0052] Explanation of reference numerals:

[0053] Core unit 10

[0054] Shaft hole 11

[0055] Shaft journal 12

[0056] Fan unit 20

[0057] Axial limiting mechanism 100

[0058] Axial limiting part 110

[0059] Groove 111

[0060] First track control disk 120

[0061] First guide groove 121

[0062] First base 130

[0063] Radial limiting mechanism 200

[0064] Radial limiting part 210

[0065] Tension block mounting seat 211

[0066] Tension block 212

[0067] Pressure sensor 213

[0068] Pin shaft 214

[0069] The second track control disk 220

[0070] The second guide groove 221

[0071] The main disk 222

[0072] The slave disk 223

[0073] The linkage shaft 224

[0074] The second base 230

[0075] The driving part 300

[0076] The driving shaft 310

[0077] The protective sleeve 320

[0078] The turntable 330

[0079] The handle 331

[0080] The rotation limiting structure 340

[0081] The limiting groove 341

[0082] The pin 342

[0083] The pin hole 343

[0084] The positioning hole 344

[0085] The guiding shaft 400

[0086] The guiding part 410

[0087] The guiding hole 411

[0088] The reference part 500

[0089] The matching sling 501

[0090] The conduit 510

[0091] The long hole 511

[0092] The marking line 512

[0093] The identification part 600

[0094] The alignment axis 610

[0095] The baseline 611 Specific embodiments

[0096] The present invention will be described below in conjunction with specific embodiments:

[0097] In conjunction with Figure 1 and Figure 2The present invention provides a core unit installation tool for assembling the core unit 10 and the fan unit 20.

[0098] The core engine unit 10 in this article refers to the engine core engine component composed of a compressor, a combustion chamber and a turbine developed to shorten the development cycle of a new engine, improve reliability or develop various types of gas turbine engines. The assembly process of the core engine unit 10 is the process of sleeve-mounting the fan unit 20 on the core engine unit 10. The core engine unit 10 has a through shaft hole 11, and the shaft hole 11 has a journal 12 protruding from the inner wall of the shaft hole 11 at a front position.

[0099] like Figure 2 As shown, the core engine unit installation tool includes an axial limiting mechanism 100, a radial limiting mechanism 200, and a driving member 300 connecting the axial limiting mechanism 100 and the radial limiting mechanism 200. The axial limiting mechanism 100 and the radial limiting mechanism 200 can be switched between a loose position located at the radial inner side and a locking position located at the radial outer side under the drive of the driving member 300. The axial limiting mechanism 100 also includes a limiting portion that can achieve axial blocking and limiting when it is in the locking position.

[0100] When in use, the axial limiting mechanism 100 and the radial limiting mechanism 200 in the loose position are extended into the shaft hole 11, and then the two are switched to the locking position through the driving member 300, thereby realizing the axial positioning and radial limiting of the core engine unit 10.

[0101] By adopting the above structure, the installation tool can perform axial positioning and radial pressing on the core unit 10 in one step, and the installation and fixation with the core unit 10 can be achieved in a short time, meeting the requirements for assembly time.

[0102] Combination Figure 3 and Figure 4 The axial limiting mechanism 100 includes a plurality of block-shaped axial limiting members 110 , a first trajectory control disk 120 and an annular first base 130 .

[0103] The first track control disk 120 is placed in the first base 130 and can rotate relative to the first base 130. A plurality of first guide grooves 121 extending obliquely from the radial inner side to the radial outer side are evenly arranged on the disk surface of the first track control disk 120 along the circumferential direction. The center of the first track control disk 120 is connected to the driving member 300 and can rotate under the drive of the driving member 300.

[0104] A plurality of openings are evenly spaced apart on the outer peripheral wall of the first base 130 , and the axial limiting members 110 are correspondingly disposed in the openings. The axial limiting members 110 are slidably connected to the first guide groove 121 .

[0105] When the axial limiting member 110 slides radially outward along the first guide groove 121, it moves outward to the locking position. When the axial limiting member 110 slides radially inward along the first guide groove 121, it moves inward to the release position. Guided by the first guide groove 121, the axial limiting member 110 is switched between the locking position and the release position.

[0106] The limiting portion is a radial groove 111 provided on the outer peripheral wall of the axial limiting member 110. When the axial limiting member 110 is in the locking position, it abuts against the journal 12, and axial blocking and limiting of the journal 12 are achieved through the groove walls on both axial sides of the groove 111.

[0107] Combined Figure 5 and Figure 6 The radial limiting mechanism 200 includes a plurality of elongated radial limiting members 210, a second track control disk 220, and an annular second base 230. The second track control disk 220 is disposed in the second base 230 and can rotate relative to the second base 230. A plurality of second guide grooves 221 that obliquely extend from the radial inner side to the radial outer side are uniformly arranged along the circumferential direction on the second track control disk 220. The centers of the second guide grooves 221 are connected to the driving member 300 and can rotate under the drive of the driving member 300.

[0108] A plurality of through grooves are uniformly arranged along the circumferential direction on the outer wall of the second base 230. The radial limiting members 210 are correspondingly disposed in the through grooves. The radial limiting members 210 are slidably connected to the second guide grooves 221.

[0109] When the radial limiting member 210 slides radially outward along the second guide groove 221, it moves outward to the locking position. When the radial limiting member 210 slides radially inward along the second guide groove 221, it moves inward to the release position. Guided by the second guide groove 221, the radial limiting member 210 is switched between the locking position and the release position.

[0110] When the radial limiting member 210 is in the locking position, its outer surface abuts against the inner surface of the shaft hole 11, thereby achieving radial limiting.

[0111] Combined Figure 5 、 Figure 7 and Figure 8, Specifically, there are two second trajectory control discs 220, which are a main disc 222 and a slave disc 223 connected by a linkage shaft 224. The main disc 222 and the slave disc 223 are mirror-symmetrical. The radial limiting member 210 includes a tensioning block mounting seat 211 and a tensioning block 212 made of copper. A pin shaft 214 is provided in the tensioning block mounting seat 211. Both ends of the pin shaft 214 extend out of the tensioning block mounting seat 211 and slide in the second guide groove 221 of the main disc 222 and the slave disc 223. The tensioning block 212 is connected to the radially outer end of the tensioning block mounting seat 211.

[0112] The reason for setting two second trajectory control discs 220 is that the length of the tensioning block mounting seat 211 is relatively large, up to 175 mm. Driven only by the second trajectory control disc 220 at one end and without trajectory guidance at the other end, there will be a situation of jamming during the movement. While setting a second trajectory control disc 220 at each end can effectively avoid the problem of jamming and make the movement of the tensioning block 212 smoother.

[0113] Preferably, a pressure sensor 213 is further installed on the outer peripheral wall of the tensioning block 212 to output the pressing force data to the operator, avoiding the failure of tool parts or core machine parts caused by insecure fixation or excessive pressing force.

[0114] Preferably, the angle between the starting end located radially inside and the ending end located radially outside of the first guide groove 121 relative to the center of the first trajectory control disc 120 is the same as the angle between the starting end located radially inside and the ending end located radially outside of the second guide groove 221 relative to the center of the second trajectory control disc 220. With such a structure, when the first trajectory control disc 120 and the second trajectory control disc 220 rotate through the same angle, the axial limiting member 110 and the radial limiting member 210 can be synchronously switched between the locking position and the releasing position, avoiding the situation where one of them is in the locking position while the other has not reached the locking position, which is beneficial to improving the locking performance.

[0115] Preferably, the radial distance between the starting end and the ending end of the first guide groove 121 is greater than the radial distance between the starting end and the ending end of the second guide groove 221. Correspondingly, the movement stroke of the axial limiting member 110 is greater than the stroke of the radial limiting member 210, which can better adapt to the structure of the core machine unit 10.

[0116] Combined Figure 2 , the core machine unit installation tool includes a guide shaft 400 and a guide member 410. The guide shaft 400 is connected to the front end of the radial limiting mechanism 200. A guide hole 411 adapted to the guide shaft 400 is provided on the guide member.

[0117] In use, the guiding member 410 is installed on the fan unit 20 to be installed. During the assembly process, when the core engine unit 10 body does not contact the fan unit 20 body, the front end of the guiding shaft 400 first enters the guiding hole 411 of the guiding member 410. Through the radial limit of the guiding hole 411 on the guiding shaft 400, the fan unit 20 to be installed and the core engine unit 10 are in a coaxial arrangement state, enabling the core engine unit 10 body to accurately and stably dock with the fan unit 20 under the guidance of the guiding shaft 400, overcoming the problems of inaccurate docking and bumping during installation.

[0118] Combined with Figure 2 and Figure 9 , since the inner cavity of the shaft hole 11 is not visible and the position of the axial limiting mechanism 100 cannot be visually observed, to solve the alignment problem between the axial limiting mechanism 100 and the journal 12. Preferably, the core engine unit installation tool further includes an identification member 600 provided on the driving member 300 and a reference member 500 connected to the core engine unit 10 for aligning the identification member 600. During assembly, the driving member 300 connected to the axial limiting mechanism 100 is inserted into the shaft hole 11 until the reference member 500 aligns with the identification member 600. At this time, the axial limiting member 110 is in the theoretical working position, that is, the position aligned with the journal 12. At this time, the groove 111 of the axial limiting member 110 can accurately limit the journal 12.

[0119] Specifically, combined with Figure 2 and Figure 11 , the reference member 500 is fixed to the mating sling 501 connecting the core engine unit and includes a conduit 510. The conduit 510 is provided with elongated holes 511 arranged axially and engraved lines 512 arranged radially intersecting the elongated holes 511. The identification member 600 is a reference axis 610 installed on the driving member 300, and four baseline 611 are arranged equidistantly along the circumferential direction on the top surface of the reference axis 610.

[0120] In use, the driving member 300 passes through the conduit 510 and enters the shaft hole 11. When the mounting hole of the reference axis 610 on the driving member 300 is at the elongated hole 511, the reference axis 610 is inserted. Rotate the reference axis 610 so that one of its baseline 611 is arranged parallel to the engraved line 512, and adjust the axial position of the driving member 300 until the baseline 611 and the engraved line 512 are aligned. At this time, the axial limiting member 110 is in the theoretical working position.

[0121] Combined with Figure 2 and Figure 9 , in this embodiment, the driving member 300 includes a driving shaft 310, a protective sleeve 320 sleeved on the driving shaft 310, and a driving device connected to the end of the driving shaft 310.

[0122] The drive shaft 310 is a square shaft, and the first trajectory control disk 120 and the second trajectory control disk 220 are provided with square holes through which the drive shaft 310 penetrates. The cooperation between the square shaft and the square hole enables the drive shaft 310 to drive the first trajectory control disk 120 and the second trajectory control disk 220 to rotate.

[0123] The protective sleeve 320 is made of a soft material. After the driving member 300 extends into the shaft hole 11, it can be disposed between the drive shaft 310 and the inner wall of the shaft hole 11 to prevent the drive shaft 310 from colliding with the core machine parts in the shaft hole 11.

[0124] The driving device includes a turntable 330 connected to the drive shaft 310 and a handle 331 provided on the outer peripheral wall of the turntable 330. The rotation of the drive shaft 310 is achieved by rotating the turntable 330.

[0125] Preferably, Figure 10 The driving member 300 further includes a rotation limiting structure 340, which includes a limiting groove 341 provided on the turntable 330, and a pin 342 provided on the end face of the protective sleeve 320 and extending into the limiting groove 341. It also includes a pin hole 343 provided on the end face of the protective sleeve 320 and a positioning hole 344 provided on the turntable 330.

[0126] When the turntable 330 is rotated to the position where the axial limiting mechanism 100 and the radial limiting mechanism 200 are in the locked position, the pin 342 runs to the end of the limiting groove 341 and is limited by the limiting groove 341, and the pin hole 343 and the positioning hole 344 coincide. Subsequently, a positioning pin is inserted into the positioning hole 344 and the pin hole 343, so that the installation tool can always lock the core machine unit 10, facilitating subsequent operations.

[0127] The above is the usage method of the installation tool for the core machine unit, and its usage method is as follows:

[0128] Connect the guide shaft 400, the radial limiting mechanism 200, the axial limiting mechanism 100 and the driving member 300 together and extend them into the shaft hole 11 of the core machine unit 10;

[0129] After the identification member 600 on the driving member 300 is aligned with the reference member 500 fixed on the core machine unit 10, drive the radial limiting mechanism 200 and the axial limiting mechanism 100 to the locked position through the driving member 300 to lock the core machine unit 10;

[0130] Stop the rotation of the driving member 300 through the rotation limiting structure 340;

[0131] Install a guiding member 410 on the fan unit 20 to be installed, make the guide shaft 400 penetrate into the guiding hole 411 on the guiding member 410, and dock and install the fan unit 20 and the core machine unit 10 under the guidance of the guide shaft 400.

[0132] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A core engine unit installation tool, characterized in that: It includes an axial limiting mechanism, a radial limiting mechanism, and a driving member connecting the axial limiting mechanism and the radial limiting mechanism. The axial limiting mechanism and the radial limiting mechanism can be switched between a release position located radially inside and a locking position located radially outside under the drive of the driving member. The axial limiting mechanism includes a limiting portion that can achieve axial blocking and limiting when it is in the locking position; the axial limiting mechanism includes an axial limiting member and a first trajectory control disk connecting the driving member and the axial limiting member. The radial limiting mechanism includes a radial limiting member and a second trajectory control disk connecting the driving member and the radial limiting member. The first trajectory control disk and the second trajectory control disk can rotate under the drive of the driving member to drive the axial limiting member and the radial limiting member to expand and contract synchronously in the radial direction. The first trajectory control disk has a first guide groove, and the axial limiting member can be switched between the release position and the locking position under the guidance of the first guide groove. The second trajectory control disk is provided with a second guide groove, and the radial limiting member can be switched between the release position and the locking position under the guidance of the second guide groove. The first guide groove obliquely extends from the radially inner side to the radially outer side of the first trajectory control disk, and the second guide groove obliquely extends from the radially inner side to the radially outer side of the second trajectory control disk. The angle between the starting end located radially inside and the ending end located radially outside of the first guide groove relative to the center of the first trajectory control disk is the same as the angle between the starting end located radially inside and the ending end located radially outside of the second guide groove relative to the center of the second trajectory control disk.

2. The core engine unit installation tool according to claim 1, characterized in that: The limiting portion is a groove extending in the radial direction provided on the axial limiting member.

3. The core engine unit installation tool according to claim 1, characterized in that: A pressure sensor is provided on the outer wall of the radial limiting member.

4. The core engine unit installation tool according to claim 1, wherein: The radial distance between the starting end and the ending end of the first guide groove is greater than the radial distance between the starting end and the ending end of the second guide groove.

5. The core engine unit installation tool according to claim 1, characterized in that: There are two second trajectory control disks in total, and both ends of the radial limiting member are slidably arranged in the second guide grooves of the two second trajectory control disks respectively.

6. The core engine unit installation tool according to claim 1, characterized in that: The core engine unit installation tool further includes a guide shaft connecting the radial limiting mechanism and a guiding member fixed on the fan unit to be installed. The guiding member is provided with a guiding hole adapted to the guide shaft.

7. The core engine unit installation tool according to claim 1, characterized in that: The core engine unit installation tool further includes an identification member provided on the driving member and a reference member connected to the core engine unit for aligning the identification member.

8. The core engine unit installation tool according to claim 7, wherein the identification member includes a reference axis provided on the driving member, and a baseline is provided on the reference axis. The reference member includes a conduit through which the driving member passes, and a marking line for aligning the baseline is provided on the conduit.

9. The core engine unit installation tool according to claim 8, characterized in that: The conduit is provided with an elongated hole extending in the axial direction, the marking line intersects the elongated hole, and the reference axis can be placed in the elongated hole.

10. The core engine unit installation tool according to claim 9, characterized in that: Multiple baselines are circumferentially and equally distributed on the end face of the reference axis.

11. The core engine unit installation tool according to claim 1, characterized in that: The driving member includes a driving shaft connecting the axial limiting mechanism and the radial limiting mechanism and a driving device capable of driving the driving shaft to rotate.

12. The core unit installation tool according to claim 11, characterized in that: The driving member further includes a protective sleeve sleeved outside the driving shaft.

13. The core engine unit installation tool according to claim 11, characterized in that: The driving device comprises a rotating disk connected to the driving shaft, and a handle is arranged on the outer peripheral surface of the rotating disk.

14. The core engine unit installation tool according to claim 13, characterized in that: The driving device also includes a rotation limiting structure, which includes a pin hole arranged on the end surface of a protective sleeve sleeve mounted outside the driving shaft and a positioning hole arranged on the turntable, and the pin hole and the positioning hole can overlap when the radial limiting mechanism and the axial limiting mechanism are in a locking position.

15. A method of using a core unit installation tool for the core unit installation tool according to any one of claims 1 to 11, characterized in that, The steps include: S10: Connect the guide shaft, the radial limiting mechanism, the axial limiting mechanism and the driving member together and extend them into the shaft hole of the core unit; S20: driving the radial limiting mechanism and the axial limiting mechanism to move to a locking position through a driving member to lock the core engine unit; S30: Install a guide piece on the fan unit to be installed, pass the guide shaft through the guide hole on the guide piece, and dock and install the fan unit and the core unit under the guidance of the guide shaft.

16. The method of using the core unit installation tool according to claim 15, characterized in that, The step S20 also includes step S21: When the identification member on the driving member is aligned with the reference member connected to the core engine unit, the driving member drives the radial limiting mechanism and the axial limiting mechanism to run to the locking position.

17. The method of using the core unit installation tool according to claim 16, characterized in that: The step S20 includes step S22: The driving member is stopped and limited by a rotation limiting structure.

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