CN114012660B - Aircraft engine centrifugal impeller elastic shaft puller and decomposition method thereof - Google Patents
Aircraft engine centrifugal impeller elastic shaft puller and decomposition method thereof Download PDFInfo
- Publication number
- CN114012660B CN114012660B CN202111326188.5A CN202111326188A CN114012660B CN 114012660 B CN114012660 B CN 114012660B CN 202111326188 A CN202111326188 A CN 202111326188A CN 114012660 B CN114012660 B CN 114012660B
- Authority
- CN
- China
- Prior art keywords
- centrifugal impeller
- elastic shaft
- puller
- axial direction
- acting force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an elastic shaft puller of a centrifugal impeller of an aircraft engine, which is characterized in that a fixed structure is fixedly connected with an elastic shaft through an inner puller; then the inner puller is disassembled and the outer puller is installed, the elastic shaft and the centrifugal impeller are disassembled through the outer puller, and finally the fixing structure is disassembled to take down the elastic shaft. This scheme is ingenious makes fixed knot construct and elastic shaft fixed connection through outer puller, in order to increase and dial and unload the effect point, avoided the elastic shaft not have to dial and unload the effect point and needn't use the unnecessary scrap that destruction formula decomposition caused, rethread outer puller decomposes fixed knot construct and centrifugal impeller, and then decompose fixed knot construct in order to take out the elastic shaft, the impact of having stopped to strike in the current elastic shaft decomposition process and the damage of bringing all the other parts of colliding with, greatly reduced aeromechanical equipment's assembly decomposition cost, the whole mechanical structure that adopts goes on of decomposition process simultaneously, and the operation is simple, the working strength is low, and the work efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of shaft pulling and unloading for an aircraft engine, in particular to an elastic shaft pulling and unloading device for a centrifugal impeller of the aircraft engine. In addition, the invention also relates to a method for decomposing the elastic shaft of the centrifugal impeller of the aircraft engine, which comprises the device for pulling and disassembling the elastic shaft of the centrifugal impeller of the aircraft engine.
Background
The centrifugal impeller is a key part of an aircraft engine, and the assembly reliability, maintenance and inspection difficulty of the centrifugal impeller are greatly influenced by the convenience of decomposition of each part on the centrifugal impeller. The reason is that in order to ensure the reliability of assembly, the elastic shaft is generally mounted at the center of the centrifugal impeller through spline fit and hole shaft interference fit, and only the external spline shaft section of the elastic shaft is exposed outside the centrifugal impeller, so that the pulling and unloading action point or action surface of the elastic shaft cannot be selected, and the difficulty of assembly is very high (as shown in fig. 1). Only one of the following decomposition methods is available: and punching and installing a pin on the exposed external spline shaft section of the elastic shaft, and knocking the pin to separate the elastic shaft from the centrifugal impeller. The defect is decomposed to destruction formula like this very big, and every part is all expensive relatively in the aeroengine, and the elastic shaft after the decomposition is directly scrapped, and is with high costs, and economic benefits is the first, strikes that the knock pin brought and collide with and cause the loss to all the other parts easily, and no matter punch on the elastic shaft, or knock the pin by lower supreme, the operation degree of difficulty is high, working strength is big, and is inefficient simultaneously.
Disclosure of Invention
The invention provides an aircraft engine centrifugal impeller elastic shaft puller and a decomposition method thereof, and aims to solve the technical problems of high cost, high operation difficulty, high working strength and low efficiency in the decomposition of a centrifugal impeller elastic shaft in the existing aircraft engine.
According to one aspect of the invention, the elastic shaft puller for the centrifugal impeller of the aircraft engine comprises a fixing structure, an inner puller and an outer puller, wherein the fixing structure is used for connecting the elastic shaft; the fixing structure comprises an inner spline elastic bushing sleeved on an outer spline of the elastic shaft, a tensioning block sleeved on the inner spline elastic bushing and used for generating radial acting force when the inner spline elastic bushing moves away from the centrifugal impeller in the axial direction so as to enable the inner spline elastic bushing to abut against the elastic shaft, a pressure transmitting structure abutted on the inner spline elastic bushing in the axial direction and used for transmitting the acting force enabling the inner spline elastic bushing to be close to the centrifugal impeller in the axial direction, a mounting structure sleeved on the pressure transmitting structure and connected with the tensioning block and used for transmitting the acting force enabling the tensioning block to be away from the centrifugal impeller in the axial direction, and a locking nut which is in threaded connection with the pressure transmitting structure and matched with the mounting structure and used for locking the fixing structure; the inner puller is respectively connected with the pressure transfer structure and the mounting structure, the outer puller is connected with the mounting structure, and the outer puller is also used for connecting the centrifugal impeller; the inner puller generates an acting force which enables the pressure transmission structure to be close to the centrifugal impeller and an acting force which enables the mounting structure to be far away from the centrifugal impeller along the axial direction, so that the inner spline elastic bushing is close to the centrifugal impeller and the tightening block is far away from the centrifugal impeller, and the tightening block generates an acting force which enables the inner spline elastic bushing to be tightly propped against the elastic shaft along the radial direction, so that the fixed connection of the fixed structure and the elastic shaft is realized; the device is characterized in that an acting force for enabling the mounting structure to be far away from the centrifugal impeller and an acting force for enabling the centrifugal impeller to be immovable are generated along the axial direction through the outer puller, and then the fixing structure is far away from the centrifugal impeller so as to realize the decomposition of the elastic shaft and the centrifugal impeller.
Further, the pressure transmission structure comprises a lower pressure sleeve which is axially abutted against the inner spline elastic bushing and a first pressure rod which is axially abutted against the lower pressure sleeve and is in threaded connection with the locking nut.
Furthermore, the mounting structure comprises a mounting plate which is sleeved on the pressure rod and is attached to the end face of the locking nut, and inner clamping claws of which the two ends in the axial direction are respectively connected with the mounting plate and the stretching block.
Further, the mounting structure further comprises a connecting pin and an inner clamping ring, the inner clamping jaw comprises a first mounting hole used for mounting the lower pressing sleeve and the locking nut and two clamping blocks symmetrically arranged along the axial direction, the connecting pin is fixedly connected with the clamping blocks and the mounting plate respectively, and the inner clamping ring is sleeved on the inner clamping jaw and used for preventing the two clamping blocks from being separated outwards in the radial direction during axial movement.
Furthermore, the internal puller comprises a switching threaded sleeve fixedly connected with the mounting plate, a hydraulic jack fixedly connected with the switching threaded sleeve, a hydraulic piston arranged in the hydraulic jack, a second pressure rod fixedly connected with the hydraulic piston and pressed against the first pressure rod, and a hydraulic pump for generating acting force which enables the hydraulic piston to be close to the centrifugal impeller along the axial direction; the hydraulic pump generates acting force enabling the hydraulic piston to be close to the centrifugal impeller along the axial direction, the hydraulic piston moves in the hydraulic jack along the axial direction towards the direction close to the centrifugal impeller to enable the acting force moving close to the centrifugal impeller along the axial direction to sequentially pass through the second pressing rod, the first pressing rod and the lower pressing sleeve to be transmitted to the inner spline elastic bushing, meanwhile, the hydraulic jack moves far away from the centrifugal impeller along the axial direction relative to the hydraulic piston to enable the acting force moving far away from the centrifugal impeller along the axial direction to sequentially pass through the transfer screw sleeve, the mounting plate and the inner clamping claw are transmitted to the tensioning block, the inner spline elastic bushing is enabled to be close to the centrifugal impeller and the tensioning block is enabled to be far away from the centrifugal impeller, and therefore the tensioning block radially generates acting force enabling the inner spline elastic bushing to abut against the elastic shaft, and fixed connection of the fixing structure and the elastic shaft is achieved.
Furthermore, the external puller comprises a supporting seat fixedly connected with the centrifugal impeller, a supporting block axially abutted against the supporting seat, an upper pressing sleeve axially abutted against the supporting block, a second pressing rod axially abutted against the upper pressing sleeve, a switching threaded sleeve fixedly connected with the mounting plate, a hydraulic jack fixedly connected with the switching threaded sleeve, a hydraulic piston arranged in the hydraulic jack and fixedly connected with the second pressing rod, and a hydraulic pump for axially generating axial pressure for enabling the hydraulic piston to be close to the acting force of the centrifugal impeller; the hydraulic pump generates acting force which enables the hydraulic piston to be far away from the centrifugal impeller along the axial direction, the hydraulic piston moves in the hydraulic jack along the axial direction towards the direction close to the centrifugal impeller so as to enable the acting force which is close to the centrifugal impeller along the axial direction to sequentially pass through the second pressure rod, the upper pressure sleeve and the supporting block to be transmitted to the supporting seat, the supporting seat is enabled to be abutted against the centrifugal impeller so as to enable the centrifugal impeller to be fixed, meanwhile, the hydraulic jack moves away from the centrifugal impeller along the axial direction relative to the hydraulic piston so as to enable the acting force which moves away from the centrifugal impeller along the axial direction to be transmitted to a fixing structure through the transfer threaded sleeve, and then the fixing structure is enabled to be far away from the centrifugal impeller, so that the elastic shaft and the centrifugal impeller are decomposed.
Furthermore, the upper pressing sleeve is arranged in the switching screw sleeve, the switching screw sleeve is provided with a second mounting hole which is formed in the radial direction and used for mounting the upper pressing sleeve and the supporting block, the supporting block comprises two L-shaped connecting blocks which are axially symmetrically arranged, and the two connecting blocks respectively penetrate through two ends of the second mounting hole in the radial direction to be connected with the upper pressing sleeve.
Furthermore, the outer puller further comprises a lower clamping ring and an upper clamping ring, wherein the lower clamping ring and the upper clamping ring are respectively sleeved at two ends of the supporting block in the axial direction and used for preventing the two connecting blocks from radially and outwards disengaging when moving axially.
Furthermore, the elastic lining of the internal spline is provided with an inclined wedge structure which extends outwards along the radial direction and extends along the axial direction, and the tightening block is provided with an extrusion surface matched with the inclined wedge structure.
According to another aspect of the invention, there is also provided a method for disassembling an elastic shaft of a centrifugal impeller of an aircraft engine, which adopts the above-mentioned centrifugal impeller elastic shaft puller, and includes the following steps: connecting the fixing structure with the elastic shaft; connecting the inner puller and the fixing structure, locking the elastic shaft by the fixing structure, and then disassembling the inner puller and the fixing structure; connecting the external puller with the fixed structure and the centrifugal impeller respectively, and then decomposing the fixed structure and the centrifugal impeller; the fixing structure is disassembled to take out the elastic shaft.
The invention has the following beneficial effects:
the invention relates to an elastic shaft puller of a centrifugal impeller of an aero-engine, which is characterized in that an internal spline elastic bushing, a tensioning block, a pressure transmitting structure, a mounting structure and a locking nut in a fixing structure are sequentially mounted on the centrifugal impeller, then the internal puller is mounted, acting force enabling the pressure transmitting structure to be close to the centrifugal impeller and acting force enabling the mounting structure to be far away from the centrifugal impeller are generated along the axial direction through the internal puller, and further the internal spline elastic bushing is close to the centrifugal impeller and the tensioning block is far away from the centrifugal impeller, so that the tensioning block generates acting force enabling the internal spline elastic bushing to be tightly pressed against an elastic shaft along the radial direction, and the fixing structure is fixedly connected with the elastic shaft; then the inner puller is disassembled and the outer puller is installed, acting force which enables the installation structure to be far away from the centrifugal impeller and acting force which enables the centrifugal impeller to be fixed are generated along the axial direction through the outer puller, then the fixed structure is far away from the centrifugal impeller, so that the elastic shaft and the centrifugal impeller are decomposed, and finally the fixed structure is decomposed to take down the elastic shaft. This scheme is ingenious makes fixed knot construct and elastic shaft fixed connection through outer puller, in order to increase and dial and unload the effect point, avoided the elastic shaft not have to dial and unload the effect point and needn't use the unnecessary scrap that destruction formula decomposition caused, rethread outer puller decomposes fixed knot construct and centrifugal impeller, and then decompose fixed knot construct in order to take out the elastic shaft, the impact of having stopped to strike in the current elastic shaft decomposition process and the damage of bringing all the other parts of colliding with, greatly reduced aeromechanical equipment's assembly decomposition cost, the whole mechanical structure that adopts goes on of decomposition process simultaneously, and the operation is simple, the working strength is low, and the work efficiency is greatly improved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic exploded view of a prior art elastomeric shaft for a centrifugal impeller;
FIG. 2 is a schematic structural view showing the connection between the fixing structure and the inner puller in the centrifugal impeller elastic shaft puller according to the preferred embodiment of the present invention;
FIG. 3 is a schematic structural view showing the connection between the fixing structure and the outer puller in the elastic shaft puller for the centrifugal impeller according to the preferred embodiment of the present invention;
FIG. 4 is a schematic structural view of an internally splined elastomeric bushing in the centrifugal impeller elastomeric shaft puller of the preferred embodiment of the present invention;
FIG. 5 is a schematic structural view of a mounting plate in the centrifugal impeller elastic shaft detacher in accordance with the preferred embodiment of the present invention;
FIG. 6 is a schematic structural view of an inner jaw in the centrifugal impeller elastic shaft remover according to the preferred embodiment of the present invention;
FIG. 7 is a schematic view showing the construction of a transfer nut in the elastic shaft puller for the centrifugal impeller according to the preferred embodiment of the present invention;
fig. 8 is a schematic view showing the structure of a support block in the elastic shaft remover for a centrifugal impeller according to the preferred embodiment of the present invention.
Illustration of the drawings:
1. a fixed structure; 11. an inner spline elastomeric bushing; 111. an inclined wedge structure; 12. a tightening block; 13. locking the nut; 14. pressing down the sleeve; 15. a first pressure lever; 16. mounting a plate; 17. an inner jaw; 171. a clamping block; 172. a first mounting hole; 18. connecting pins; 19. an inner collar; 2. an inner puller; 21. transferring a threaded sleeve; 211. a second mounting hole; 22. a hydraulic jack; 23. a second compression bar; 3. an external puller; 31. a supporting seat; 32. a support block; 321. connecting blocks; 33. pressing a sleeve; 34. a lower retainer ring; 35. and an upper collar.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
FIG. 1 is a schematic exploded view of a prior art elastomeric shaft for a centrifugal impeller; FIG. 2 is a schematic structural view showing the connection between the fixing structure and the inner puller in the centrifugal impeller elastic shaft puller according to the preferred embodiment of the present invention; FIG. 3 is a schematic structural view showing the connection between the fixing structure and the outer puller in the centrifugal impeller elastic shaft puller according to the preferred embodiment of the present invention; FIG. 4 is a schematic structural view of an internally splined elastomeric bushing in the centrifugal impeller elastomeric shaft puller of the preferred embodiment of the present invention; FIG. 5 is a schematic structural view of a mounting plate in the centrifugal impeller elastic shaft detacher in accordance with the preferred embodiment of the present invention; FIG. 6 is a schematic structural view of an inner jaw in the centrifugal impeller elastic shaft puller according to the preferred embodiment of the invention; FIG. 7 is a schematic view of the construction of the adaptor nut in the centrifugal impeller elastic shaft detacher in accordance with the preferred embodiment of the present invention; fig. 8 is a schematic view showing the structure of a support block in the elastic shaft puller for the centrifugal impeller according to the preferred embodiment of the present invention.
As shown in fig. 2 to 8, the elastic shaft puller for the centrifugal impeller of the aircraft engine in the embodiment includes a fixing structure 1 for connecting an elastic shaft, an inner puller 2 connected to the fixing structure 1 for applying force to fixedly connect the fixing structure 1 and the elastic shaft, and an outer puller 3 connected to the fixing structure 1 for applying force to disassemble the fixing structure 1 and the centrifugal impeller; the fixing structure 1 comprises an inner spline elastic bushing 11 sleeved on an outer spline of the elastic shaft, a tightening block 12 sleeved on the inner spline elastic bushing 11 and used for generating radial acting force when moving away from the centrifugal impeller in the axial direction so as to enable the inner spline elastic bushing 11 to tightly abut against the elastic shaft, a pressure transmitting structure axially abutted on the inner spline elastic bushing 11 and used for transmitting the acting force enabling the inner spline elastic bushing 11 to be close to the centrifugal impeller in the axial direction, a mounting structure sleeved on the pressure transmitting structure and connected with the tightening block 12 and used for transmitting the acting force enabling the tightening block 12 to be away from the centrifugal impeller in the axial direction, and a locking nut 13 which is in threaded connection with the pressure transmitting structure and matched with the mounting structure and used for locking the fixing structure 1; the inner puller 2 is respectively connected with the pressure transmission structure and the mounting structure, the outer puller 3 is connected with the mounting structure, and the outer puller 3 is also used for connecting a centrifugal impeller; an acting force which enables the pressure transmission structure to be close to the centrifugal impeller and an acting force which enables the mounting structure to be far away from the centrifugal impeller are generated along the axial direction through the inner puller 2, so that the inner spline elastic bushing 11 is close to the centrifugal impeller and the tensioning block 12 is far away from the centrifugal impeller, and the tensioning block 12 generates an acting force which enables the inner spline elastic bushing 11 to be tightly abutted against the elastic shaft along the radial direction, so that the fixed connection of the fixed structure 1 and the elastic shaft is realized; the outer puller 3 generates acting force which enables the mounting structure to be far away from the centrifugal impeller along the axial direction and generates acting force which enables the centrifugal impeller to be fixed along the axial direction, and then the fixing structure 1 is far away from the centrifugal impeller to realize the decomposition of the elastic shaft and the centrifugal impeller. Specifically, the elastic shaft puller of the centrifugal impeller of the aircraft engine is characterized in that firstly, an internal spline elastic bushing 11, a tightening block 12, a pressure transmission structure, an installation structure and a locking nut 13 in a fixed structure 1 are sequentially installed on the centrifugal impeller, then an internal puller 2 is installed, an acting force enabling the pressure transmission structure to be close to the centrifugal impeller and an acting force enabling the installation structure to be far away from the centrifugal impeller are generated along the axial direction through the internal puller 2, and further the internal spline elastic bushing 11 is close to the centrifugal impeller and the tightening block 12 is far away from the centrifugal impeller, so that the tightening block 12 generates an acting force enabling the internal spline elastic bushing 11 to be tightly abutted against an elastic shaft along the radial direction, and the fixed structure 1 is fixedly connected with the elastic shaft; then the inner puller 2 is disassembled and the outer puller 3 is installed, acting force which enables the installation structure to be far away from the centrifugal impeller and acting force which enables the centrifugal impeller to be fixed are generated along the axial direction through the outer puller 3, then the fixed structure 1 is far away from the centrifugal impeller, so that the elastic shaft and the centrifugal impeller are separated, and finally the fixed structure 1 is separated to take down the elastic shaft. This scheme is ingenious makes fixed knot construct 1 and elastic shaft fixed connection through outer puller 3, in order to increase to dial and unload the action point, avoided the elastic shaft not have to dial and unload the action point and carelessly use the unnecessary of destruction formula decomposition to cause scrap, rethread outer puller 3 decomposes fixed knot construct 1 and centrifugal impeller, and then decomposes fixed knot structure 1 in order to take out the elastic shaft, the impact of knocking and bringing among the current elastic shaft decomposition process and the damage of colliding with and bringing all the other parts have been stopped, greatly reduced aeromechanical equipment's assembly decomposition cost, decomposition process whole journey adoption mechanical structure goes on simultaneously, moreover, the operation is simple, the working strength is low, the work efficiency is greatly improved.
As shown in fig. 2, in the present embodiment, the pressure transmission structure includes a lower pressing sleeve 14 axially pressing against the elastic bushing 11 of the internal spline, and a first pressing rod 15 axially pressing against the lower pressing sleeve 14 and threadedly connected to the lock nut 13. Specifically, the inner puller 2 transmits an acting force close to the centrifugal impeller in the axial direction to the inner spline elastic bushing 11 through the first pressing rod 15 and the lower pressing sleeve 14, after the inner spline elastic bushing 11 is extruded to tightly abut against the elastic shaft, the first pressing rod 15 and the mounting structure move relatively, and then the locking nut 13 is rotated, so that the first pressing rod 15 and the mounting structure are fixed, and the fixed structure 1 and the elastic shaft are further ensured to be fixedly connected. It should be understood that the first pressing rod 15 is disposed in the middle of the fixing structure 1, and the inner spline elastic bushing 11 is sleeved on the elastic shaft, the first pressing rod 15 cannot directly press the inner spline elastic bushing 11, and therefore, the pressing sleeve 14 is required to transmit the force.
As shown in fig. 2 and 5, in the present embodiment, the mounting structure includes a mounting plate 16 that is sleeved on the pressure rod and is attached to the end surface of the lock nut 13, and an inner jaw 17 that is connected to the mounting plate 16 and the tightening block 12 at two ends in the axial direction. Specifically, the inner puller 2 transmits an acting force far away from the centrifugal impeller along the axial direction to the tensioning block 12 through the mounting plate 16 and the inner clamping claw 17, so that the tensioning block 12 and the inner spline elastic bushing 11 move relatively, and further the tensioning block 12 generates a radial acting force to enable the inner spline elastic bushing 11 to abut against the elastic shaft, at the moment, the first pressure rod 15 and the mounting plate 16 move relatively, then the locking nut 13 rotates, the end surface of the mounting plate 16 is attached to the locking nut 13, so that the first pressure rod 15 and the mounting plate 16 are fixed, and the fixed structure 1 and the elastic shaft are fixedly connected.
As shown in fig. 2, in the present embodiment, the mounting structure further includes a connecting pin 18 and an inner collar 19, the inner collar 17 includes a first mounting hole 172 for receiving the lower pressing sleeve 14 and the lock nut 13 and two blocks 171 symmetrically arranged along the axial direction, the connecting pin 18 is fixedly connected to the block 171 and the mounting plate 16, respectively, and the inner collar 19 is sleeved on the inner collar 17 and is used for preventing the two blocks 171 from being removed radially outward when moving axially. Specifically, the connecting end of the clamping block 171 close to the tightening block 12 is provided with a mounting platform formed by extending radially outward, and the inner clamping ring 19 is elastically sleeved on the mounting platform, so as to prevent the two clamping blocks 171 from being disengaged radially outward under the influence of the reaction force in the radial direction of the tightening block 12 when moving axially. It should be understood that the inner jaw 17 is assembled on the mounting structure through the two clamping blocks 171, and the lower pressing sleeve 14 and the lock nut 13 are assembled through the first mounting hole 172, so that the mounting structure is simple to assemble, and the first mounting hole 172 facilitates the application of force to rotate the lock nut 13, thereby ensuring that the fixing structure 1 is fixedly connected with the elastic shaft.
As shown in fig. 2, in the present embodiment, the internal detacher 2 includes an adapting screw sleeve 21 fixedly connected to the mounting plate 16, a hydraulic jack 22 fixedly connected to the adapting screw sleeve 21, a hydraulic piston installed in the hydraulic jack 22, a second pressing rod 23 fixedly connected to the hydraulic piston and abutting against the first pressing rod 15, and a hydraulic pump for generating an acting force in an axial direction so that the hydraulic piston approaches the centrifugal impeller; the hydraulic pump generates acting force enabling the hydraulic piston to be close to the centrifugal impeller along the axial direction, the hydraulic piston moves in the hydraulic jack 22 along the axial direction towards the direction close to the centrifugal impeller so that the acting force moving close to the centrifugal impeller along the axial direction is transmitted to the internal spline elastic bushing 11 sequentially through the second pressure rod 23, the first pressure rod 15 and the lower pressure sleeve 14, meanwhile, the hydraulic jack 22 moves away from the centrifugal impeller along the axial direction relative to the hydraulic piston so that the acting force moving away from the centrifugal impeller along the axial direction is transmitted to the tensioning block 12 sequentially through the switching threaded sleeve 21, the mounting plate 16 and the internal clamping claw 17, the internal spline elastic bushing 11 is enabled to be close to the centrifugal impeller and the tensioning block 12 is enabled to be away from the centrifugal impeller, and therefore the tensioning block 12 generates acting force enabling the internal spline elastic bushing 11 to abut against the elastic shaft along the radial direction, and fixed connection of the fixed structure 1 and the elastic shaft is achieved. Specifically, the hydraulic pump gradually pressurizes from zero, hydraulic oil enters an inner cavity of the hydraulic jack 22, so that the hydraulic piston moves axially downwards, and due to the fact that the second pressure lever 23 is fixedly connected with the hydraulic piston, the second pressure lever 23 and the hydraulic piston move downwards relative to the hydraulic jack 22 together, and the downward pressure is equivalent to that the second pressure lever 23 provides a downward pressure for the first pressure lever 15, and the downward pressure is sequentially transmitted downwards to the lower pressure sleeve 14 and the inner spline elastic bushing 11; on the other hand, the switching swivel nut 21 is fixedly connected with the hydraulic jack 22 and the mounting plate 16 through connecting threads, the mounting plate 16 hooks the supporting block 12 through the inner clamping jaw 17, the liquid jack moves upwards relative to the hydraulic piston, namely, the hydraulic jack 22 sequentially drives the switching swivel nut 21, the mounting plate 16, the inner clamping jaw 17 and the supporting block 12 to move upwards, so that the inner spline elastic bushing 11 simultaneously bears downward pressure and radial acting force generated by the supporting block 12 and only inwards abuts against the elastic shaft outer spline, when the hydraulic pump gradually increases the pressure to a preset pressure (for example, 10 tons), the locking nut 13 is screwed through manual rotation, the fixing structure 1 is fixedly connected with the elastic shaft, and the structure is stable and unchanged after the hydraulic pump releases the pressure.
As shown in fig. 3, in this embodiment, the external detacher 3 includes a supporting seat 31 for being fixedly connected with the centrifugal impeller, a supporting block 32 axially abutting against the supporting seat 31, an upper pressing sleeve 33 axially abutting against the supporting block 32, a second pressing rod 23 axially abutting against the upper pressing sleeve 33, a switching thread insert 21 fixedly connected with the mounting plate 16, a hydraulic jack 22 fixedly connected with the switching thread insert 21, a hydraulic piston installed in the hydraulic jack 22 and fixedly connected with the second pressing rod 23, and a hydraulic pump for generating an axial pressure along an axial direction to make the hydraulic piston approach to the centrifugal impeller; the hydraulic pump generates acting force enabling the hydraulic piston to be far away from the centrifugal impeller along the axial direction, the hydraulic piston moves in the hydraulic jack 22 along the axial direction towards the direction close to the centrifugal impeller so that the acting force moving along the axial direction close to the centrifugal impeller is transmitted to the supporting seat 31 through the second pressure rod 23, the upper pressure sleeve 33 and the supporting block 32 in sequence, the supporting seat 31 presses the centrifugal impeller to enable the centrifugal impeller to be fixed, meanwhile, the hydraulic jack 22 moves relative to the hydraulic piston along the axial direction far away from the centrifugal impeller so that the acting force moving along the axial direction far away from the centrifugal impeller is transmitted to the fixing structure 1 through the transfer threaded sleeve 21, and then the fixing structure 1 is far away from the centrifugal impeller, and therefore the elastic shaft and the centrifugal impeller are separated. Specifically, the hydraulic pump gradually pressurizes from zero, hydraulic oil enters the inner cavity of the hydraulic jack 22, so that the hydraulic piston moves downwards, and as the second pressure lever 23 is fixedly connected with the hydraulic piston, the second pressure lever 23 and the hydraulic piston move downwards together relative to the hydraulic jack 22, which is equivalent to that the second pressure lever 23 applies a downward pressure to the upper pressure sleeve 33, and the downward pressure is sequentially transmitted downwards to the supporting block 32, the supporting seat 31 and the centrifugal impeller; on the other hand, the switching threaded sleeve 21 is fixedly connected with the hydraulic jack 22 and the fixed structure 1 through a threaded structure, the hydraulic jack 22 moves upwards relative to the hydraulic piston, namely the hydraulic jack 22 sequentially drives the switching threaded sleeve 21 and the fixed structure 1 to move upwards, so that the edge shoulder of the centrifugal impeller is stressed downwards, the elastic shaft in the middle of the centrifugal impeller is stressed upwards, and when the hydraulic pump gradually increases the pressure, the elastic shaft can be pulled out from the centrifugal impeller.
As shown in fig. 7 and 8, in the present embodiment, the upper pressing sleeve 33 is disposed in the adaptor nut 21, the adaptor nut 21 is provided with a second mounting hole 211 opened in the radial direction for mounting the upper pressing sleeve 33 and the support block 32, the support block 32 includes two connection blocks 321 arranged axially symmetrically in an "L" shape, and the two connection blocks 321 respectively penetrate through both ends of the second mounting hole 211 in the radial direction to be connected to the upper pressing sleeve 33. It should be understood that the support block 32 is assembled to the support block 31 by means of the two connection blocks 321, while the press sleeve 33 and the support block 32 are assembled by means of the second mounting hole 211, so that the external puller 3 is easy to assemble.
As shown in fig. 3, in this embodiment, the external remover 3 further includes a lower retainer 34 and an upper retainer 35, and the lower retainer 34 and the upper retainer 35 are respectively sleeved on two ends of the supporting block 32 in the axial direction and are used for preventing the two connecting blocks 321 from being pulled out radially when moving axially. In particular, the support block 32 is firmly connected to the support seat 31 by the lower collar 34, the support block 32 is firmly connected to the upper press sleeve 33 by the upper collar 35, and the two connecting blocks 321 are prevented from coming out radially when they move axially.
In the embodiment, as shown in fig. 4, the internally splined elastic bushing 11 is provided with a wedge structure 111 extending radially outwards and extending axially, and the tightening block 12 is provided with a pressing surface matching with the wedge structure 111. Specifically, the tightening block 12 and the inclined wedge structure 111 are matched through a conical surface with a preset taper, and the preset taper range is 13-25 degrees, so that radial acting force is generated when the tightening block 12 and the internal spline elastic bushing 11 move relatively. It should be understood that, when the preset taper is larger than 25 °, the acting force generated by pressing the tensioning block 12 is too large, the requirement on the strength of the component is high, and the production cost is increased; when the preset taper is smaller than 13 degrees, the radial acting force generated by the axial movement of the tensioning block 12 is reduced, the axial movement distance between the tensioning block 12 and the inner spline elastic bushing 11 needs to be increased, and further the axial length of the tensioning block 12 and the inner spline elastic bushing 11 needs to be increased, but the length of the elastic shaft outer spline is limited, so that the preset taper smaller than 13 degrees is not suitable for actual conditions.
The method for decomposing the elastic shaft of the centrifugal impeller of the aircraft engine in the embodiment adopts the centrifugal impeller elastic shaft puller, and comprises the following steps: connecting the fixed structure 1 with the elastic shaft; connecting the inner puller 2 with the fixed structure 1, locking the elastic shaft by the fixed structure 1, and then disassembling the inner puller 2 and the fixed structure 1; the external puller 3 is respectively connected with the fixed structure 1 and the centrifugal impeller, and then the fixed structure 1 and the centrifugal impeller are decomposed; the fixed structure 1 is disassembled to take out the elastic shaft.
The method for decomposing the elastic shaft of the centrifugal impeller of the aircraft engine comprises the following steps:
step 1: checking whether the clamp is abnormal or not, cleaning the part and the clamp and preparing;
and 2, step: the supporting seat 31 is arranged in a centrifugal impeller, an inner spline elastic bushing 11 is arranged on an elastic shaft, a first pressure lever 15, a mounting plate 16, a locking nut 13 and a connecting pin 18 are sequentially arranged, 2 inner clamping claws 17 are slid to be connected with the connecting pin 18 and hook the lower end face of a supporting block 12, then an inner clamping ring 19 is sleeved on the inner clamping claws 17, the height of the first pressure lever 15 is adjusted so as to put a lower pressure sleeve 14 into the supporting seat, the switching threaded sleeve 21 is screwed into the mounting plate 16, a hydraulic jack 22 screwed into a second pressure lever 23 is screwed into the switching threaded sleeve 21, the second pressure lever 23 is rotated to tightly press the upper end face of the first pressure lever 15, and an oil pipe of the hydraulic pump is connected to the hydraulic jack 22;
and step 3: the hydraulic pump gradually pressurizes from zero to a preset pressure, and a locking nut 13 is screwed;
and 4, step 4: the hydraulic pump releases pressure, and the hydraulic pump and the hydraulic jack 22 are disassembled;
and 5: a supporting block 32 is installed through an upper hole of the adapter screw sleeve 21, the supporting block 32 is pressed on the supporting seat 31, then a pressing sleeve 33 is installed, a lower clamping ring 34 and an upper clamping ring 35 are sequentially sleeved on the supporting block 32, the hydraulic jack 22 screwed with the second pressure rod 23 is screwed on the adapter screw sleeve 21, the second pressure rod 23 is rotated to press the upper pressing sleeve 33, and an oil pipe of the hydraulic pump is connected to the hydraulic jack 22;
step 6: the hydraulic pump is gradually pressurized from zero until the elastic shaft is disengaged from the centrifugal impeller
And 7: the hydraulic pump releases the pressure, and the hydraulic pump and the hydraulic jack 22 are disassembled, each fixture is sequentially separated, the elastic shaft is taken out, the parts and the fixtures are arranged, and the inspection fixtures are cleaned.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An aircraft engine centrifugal impeller elastic shaft puller is characterized by comprising a fixing structure (1) for connecting an elastic shaft, an inner puller (2) connected with the fixing structure (1) and used for applying force to fixedly connect the fixing structure (1) and the elastic shaft, and an outer puller (3) connected with the fixing structure (1) and used for applying force to disassemble the fixing structure (1) and a centrifugal impeller;
the fixing structure (1) comprises an inner spline elastic bushing (11) sleeved on an outer spline of the elastic shaft, a tensioning block (12) sleeved on the inner spline elastic bushing (11) and used for generating radial acting force when the inner spline elastic bushing (11) moves away from the centrifugal impeller in the axial direction so as to enable the inner spline elastic bushing (11) to be abutted against the elastic shaft, a pressure transmission structure abutted against the inner spline elastic bushing (11) in the axial direction and used for transmitting the acting force enabling the inner spline elastic bushing (11) to be close to the centrifugal impeller in the axial direction, a mounting structure sleeved on the pressure transmission structure and connected with the tensioning block (12) and used for transmitting the acting force enabling the tensioning block (12) to be away from the centrifugal impeller in the axial direction, and a locking nut (13) which is in threaded connection with the pressure transmission structure and matched with the mounting structure and used for locking the fixing structure (1);
the inner puller (2) is respectively connected with the pressure transmission structure and the mounting structure, the outer puller (3) is connected with the mounting structure, and the outer puller (3) is also used for connecting a centrifugal impeller;
an acting force which enables the pressure transmission structure to be close to the centrifugal impeller and an acting force which enables the mounting structure to be far away from the centrifugal impeller are generated along the axial direction through the inner puller (2), so that the inner spline elastic bushing (11) is close to the centrifugal impeller and the tightening block (12) is far away from the centrifugal impeller, and the tightening block (12) generates an acting force which enables the inner spline elastic bushing (11) to be tightly propped against the elastic shaft along the radial direction, so that the fixed structure (1) is fixedly connected with the elastic shaft;
an acting force which enables the mounting structure to be far away from the centrifugal impeller and an acting force which enables the centrifugal impeller to be fixed are generated along the axial direction through the outer puller (3), so that the fixing structure is far away from the centrifugal impeller, and the elastic shaft and the centrifugal impeller are decomposed;
the pressure transmission structure comprises a lower pressure sleeve (14) which is axially pressed on the inner spline elastic bushing (11) and a first pressure rod (15) which is axially pressed on the lower pressure sleeve (14) and is in threaded connection with the locking nut (13).
2. The aircraft engine centrifugal impeller elastic shaft puller according to claim 1, wherein the mounting structure comprises a mounting plate (16) sleeved on the compression bar and attached to the end face of the locking nut (13), and an inner clamping claw (17) with two ends in the axial direction respectively connected with the mounting plate (16) and the tightening block (12).
3. The aeroengine centrifugal impeller elastic shaft puller according to claim 2, wherein the mounting structure further comprises a connecting pin (18) and an inner clamping ring (19), the inner clamping jaw (17) comprises a first mounting hole (172) for mounting the lower pressing sleeve (14) and the locking nut (13) and two clamping blocks (171) symmetrically arranged along the axial direction, the connecting pin (18) is fixedly connected with the clamping blocks (171) and the mounting plate (16) respectively, and the inner clamping ring (19) is sleeved on the inner clamping jaw (17) and used for preventing the two clamping blocks (171) from being radially outwards disengaged during axial movement.
4. The aircraft engine centrifugal impeller elastic shaft puller according to claim 2, wherein the inner puller (2) comprises an adapter screw sleeve (21) fixedly connected with the mounting plate (16), a hydraulic jack (22) fixedly connected with the adapter screw sleeve (21), a hydraulic piston arranged in the hydraulic jack (22), a second pressure rod (23) fixedly connected with the hydraulic piston and pressed against the first pressure rod (15), and a hydraulic pump for generating acting force for enabling the hydraulic piston to be close to the centrifugal impeller along the axial direction;
the hydraulic pump generates acting force enabling the hydraulic piston to be close to the centrifugal impeller along the axial direction, the hydraulic piston moves in the hydraulic jack (22) along the axial direction towards the direction close to the centrifugal impeller so that the acting force moving close to the centrifugal impeller along the axial direction is transmitted to the inner spline elastic bushing (11) through the second pressure rod (23), the first pressure rod (15) and the lower pressure sleeve (14) sequentially, meanwhile, the hydraulic jack (22) moves away from the centrifugal impeller along the axial direction relative to the hydraulic piston so that the acting force moving away from the centrifugal impeller along the axial direction is transmitted to the tensioning block (12) sequentially through the switching threaded sleeve (21), the mounting plate (16) and the inner clamping claw (17), further, the inner spline elastic bushing (11) is enabled to be close to the centrifugal impeller and the tensioning block (12) is enabled to be away from the centrifugal impeller, and therefore the tensioning block (12) generates acting force enabling the inner spline elastic bushing (11) to be abutted against the elastic shaft along the radial direction, and fixed connection of the fixed structure (1) and the elastic shaft is achieved.
5. The aircraft engine centrifugal impeller elastic shaft puller according to claim 2, wherein the outer puller (3) comprises a supporting seat (31) fixedly connected with the centrifugal impeller, a supporting block (32) axially abutted against the supporting seat (31), an upper pressing sleeve (33) axially abutted against the supporting block (32), a second pressing rod (23) axially abutted against the upper pressing sleeve (33), a switching threaded sleeve (21) fixedly connected with the mounting plate (16), a hydraulic jack (22) fixedly connected with the switching threaded sleeve (21), a hydraulic piston arranged in the hydraulic jack (22) and fixedly connected with the second pressing rod (23), and a hydraulic pump for axially generating acting force axial pressure for enabling the hydraulic piston to be close to the centrifugal impeller;
the hydraulic pump generates acting force enabling the hydraulic piston to be far away from the centrifugal impeller along the axial direction, the hydraulic piston moves in the direction close to the centrifugal impeller along the axial direction in the hydraulic jack (22) so that the acting force moving close to the centrifugal impeller along the axial direction sequentially passes through the second pressure rod (23), the upper pressure sleeve (33) and the supporting block (32) and is transmitted to the supporting seat (31), the supporting seat (31) supports against the centrifugal impeller to enable the centrifugal impeller to be fixed, meanwhile, the hydraulic jack (22) moves far away from the centrifugal impeller along the axial direction relative to the hydraulic piston so that the acting force moving far away from the centrifugal impeller along the axial direction is transmitted to the fixing structure (1) through the adapter screw sleeve (21), and then the fixing structure (1) is far away from the centrifugal impeller so that the elastic shaft and the centrifugal impeller can be decomposed.
6. The aircraft engine centrifugal impeller elastic shaft puller according to claim 5, wherein the upper pressing sleeve (33) is arranged in the switching threaded sleeve (21), the switching threaded sleeve (21) is provided with a second mounting hole (211) which is formed in the radial direction and used for mounting the upper pressing sleeve (33) and the supporting block (32), the supporting block (32) comprises two L-shaped connecting blocks (321) which are axially symmetrically arranged, and the two connecting blocks (321) respectively penetrate through two ends of the second mounting hole (211) in the radial direction to be connected with the upper pressing sleeve (33).
7. The aeroengine centrifugal impeller elastic shaft puller according to claim 6, wherein the outer puller (3) further comprises a lower retainer ring (34) and an upper retainer ring (35), the lower retainer ring (34) and the upper retainer ring (35) are respectively sleeved at two ends of the supporting block (32) in the axial direction and are used for preventing the two connecting blocks (321) from being pulled out radially outwards when moving axially.
8. An aircraft engine centrifugal impeller elastic shaft puller according to any one of claims 1 to 7, characterized in that the internal spline elastic bushing (11) is provided with a slanting wedge structure (111) which extends outwards in the radial direction and extends in the axial direction, and the bracing block (12) is provided with a pressing surface matched with the slanting wedge structure (111).
9. A method for disassembling an elastic shaft of a centrifugal impeller of an aircraft engine, which is characterized in that the elastic shaft puller of the centrifugal impeller, which is disclosed by any one of claims 1 to 8, is adopted, and the method comprises the following steps:
connecting the fixed structure (1) with the elastic shaft;
connecting the inner puller (2) with the fixed structure (1) and enabling the fixed structure (1) to lock the elastic shaft, and then disassembling the inner puller (2) and the fixed structure (1);
the external puller (3) is respectively connected with the fixed structure (1) and the centrifugal impeller, and then the fixed structure (1) and the centrifugal impeller are decomposed;
the fixing structure (1) is disassembled to take out the elastic shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326188.5A CN114012660B (en) | 2021-11-10 | 2021-11-10 | Aircraft engine centrifugal impeller elastic shaft puller and decomposition method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326188.5A CN114012660B (en) | 2021-11-10 | 2021-11-10 | Aircraft engine centrifugal impeller elastic shaft puller and decomposition method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114012660A CN114012660A (en) | 2022-02-08 |
| CN114012660B true CN114012660B (en) | 2023-04-07 |
Family
ID=80063236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111326188.5A Active CN114012660B (en) | 2021-11-10 | 2021-11-10 | Aircraft engine centrifugal impeller elastic shaft puller and decomposition method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114012660B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117283272A (en) * | 2023-11-27 | 2023-12-26 | 成都国营锦江机器厂 | Method for disassembling elastic shaft of power turbine assembly of aircraft engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159743A (en) * | 1989-05-08 | 1992-11-03 | Posi Lock Puller, Inc. | Hydraulic puller |
| TWM530219U (en) * | 2016-07-20 | 2016-10-11 | Gu Siang Tools Develop Co Ltd | Wheel axle pulling off device |
| CN110977876A (en) * | 2019-11-29 | 2020-04-10 | 安庆中船动力配套有限公司 | Valve seat drawing device |
| CN112894321A (en) * | 2019-12-03 | 2021-06-04 | 江苏凯恩特机械设备制造有限公司 | Hydraulic key puller and key pulling method thereof |
| CN214237986U (en) * | 2020-11-24 | 2021-09-21 | 锡林郭勒热电有限责任公司 | Centrifugal pump impeller assembly and disassembly tools |
| CN214251805U (en) * | 2020-12-31 | 2021-09-21 | 中国人民解放军32181部队 | Conical workpiece drawing clamp |
-
2021
- 2021-11-10 CN CN202111326188.5A patent/CN114012660B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114012660A (en) | 2022-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114012660B (en) | Aircraft engine centrifugal impeller elastic shaft puller and decomposition method thereof | |
| CN202251493U (en) | Locking connecting flange | |
| CN109551202A (en) | The assembly and disassembly methods of shaft coupling | |
| CN112943544B (en) | Locking disc for wind driven generator | |
| CN110253261B (en) | Disc part pulling and unloading device | |
| CN201487069U (en) | Quickly connected coupling with single taper sleeve | |
| CN104440766B (en) | A kind of disassembling fixture of interference bolt and method | |
| CN213018264U (en) | Flange rapid connection disc for hydraulic equipment detection | |
| CN213918044U (en) | Aerogenerator sliding ring extracting tool | |
| CN114029901A (en) | Tool and method for assembling rotor of gas generator of aircraft engine | |
| CN209903091U (en) | Pin pulling device | |
| CN108393836B (en) | Method for disassembling and assembling hydraulic coupler of crusher | |
| CN209444680U (en) | A kind of fast assembling-disassembling fastener | |
| CN216577635U (en) | Coupler drawing device | |
| CN213498941U (en) | Dismounting tool of shaft sleeve | |
| CN200984727Y (en) | Three wedge claw bearing dismounting device | |
| CN218875306U (en) | Puller for disassembling core machine of micro gas turbine | |
| CN219900295U (en) | Novel double-cone expansion clamp for processing cylinder sleeve excircle | |
| CN220719198U (en) | Cylinder flip nut assembly and disassembly tools | |
| CN211709182U (en) | Swift splitting device of air compressor unit | |
| CN213081299U (en) | Chain pin pulling device | |
| CN213647396U (en) | Disassembling tool | |
| CN219685449U (en) | Pipeline supporting device on two sides of check valve | |
| CN217663504U (en) | Novel dismouting structure of multi-cylinder cone crusher bowl type bearing frame and main shaft | |
| CN212123116U (en) | Special tool for disassembling mechanical seal shaft sleeve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |