Rotor shaft end nut stop tool and assembling and disassembling method

Abstract

The invention discloses a rotor shaft end nut stopping tool and an assembling and disassembling method, and belongs to the technical field of aero-engines. A movable stopping protruding block is arranged on an assembling core, the assembling core can enter an inner cavity of a rotor from the air inlet end of the rotor, the stopping protruding block can be matched with an anti-rotation groove in an inserted mode through stretching out of the stopping protruding block, and therefore the rotor shaft end nut is prevented from being damaged. Therefore, the rotor is static in the follow-up assembly process of the shaft end gear and the shaft end nut, the assembly core can be inserted into the rotor from the opening of the air inlet end of the rotor, and the shaft end nut on the rotor and the shaft end nut on the rotor can be mounted and dismounted when the rotor is in an assembly state. Meanwhile, the width of a movable part used for installing a stop convex block in the installation groove is matched with the width of an opening of the installation groove, the movable part can rapidly transmit torque to the assembly core and can also support the installation groove in the width direction, and the situation that the part, provided with the installation groove, of the assembly core and the movable part deform under the action of the torque is prevented; the assembly core and the movable part are prevented from being broken, and the use safety of the device is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of aeroengines, and in particular to a rotor shaft end nut stopping tool, and an assembly and disassembly method. Background Art

[0002] The rotor journal parts of aircraft engines need to be tightened by the shaft end nuts. To ensure that the parts will not loosen axially during operation, the tightening torque is usually large.

[0003] When tightening the shaft end nut, the shaft neck needs to be used to prevent rotation. The anti-rotation feature is usually to set an anti-rotation groove in the shaft neck. The anti-rotation groove structure on the rotor shaft neck is deep in the shaft neck and away from the rotor inlet end. The diameter of the rotor inlet end is small, but the diameter of the anti-rotation groove is large. Figure 1 As shown, the existing method requires the anti-rotation seat to be installed from the rear end and then fixed at the air intake end. The operation process is complicated, and this method can only be used in the component state, such as Figure 1 As shown, when the engine is assembled, the rear end of the rotor has been equipped with other parts. If the front journal nut needs to be loosened, the rear end parts must be disassembled first, which increases the workload exponentially.

[0004] Based on this, the present invention designs a rotor shaft end nut stopping tool, assembly and disassembly method to solve the above problems. Summary of the invention

[0005] The invention provides a rotor shaft end nut stopping tool, an assembly and disassembly method, so as to solve the technical problems that the existing anti-rotation seat cannot be put into the rotor from the rotor air inlet end and the existing pressing tool and the anti-rotation seat are independent of each other.

[0006] According to one aspect of the present invention, a rotor shaft end nut stopping tool is provided, comprising an assembly unit and a stopping unit; the assembly unit comprises an assembly core and a support platform, the assembly core is used to be installed into the rotor from the rotor inlet end, the support platform is fixedly arranged at one end of the assembly core, and is used to abut against the end face of the rotor inlet end to position the assembly core in the axial direction of the rotor, a plurality of mounting grooves are provided on the side of the assembly core, and the plurality of mounting grooves are used to correspond one-to-one with the plurality of anti-rotation grooves provided in the inner cavity of the rotor; the stopping unit comprises a movable part and a stopping protrusion arranged on the movable part, the movable part is provided with a plurality of movable parts, and the plurality of movable parts are correspondingly installed in the plurality of mounting grooves, the movable part is movably arranged in the mounting groove and is used to enable the stopping protrusion to move into or out of the anti-rotation groove; a square groove for connecting a nut wrench is provided on the support platform; the opening width of the mounting groove matches the width of the movable part, so that the movable part always keeps contact on both sides of the mounting groove width direction while moving in the mounting groove, and the length of the assembly core is not less than the distance from the side of the anti-rotation groove in the rotor away from the rotor inlet end to the end face of the rotor inlet end.

[0007] As a further solution of the present invention, the installation groove extends to a side of the support platform away from the assembly core, and the movable member is provided with a driving end extending from a side of the support platform away from the assembly core.

[0008] As a further solution of the present invention, a stop cover is provided at the driving end of the movable part. The stop cover is larger than the movable part in the width direction of the movable part and is used to contact the side of the support platform away from the assembly core to position the movable part in the length direction of the assembly core.

[0009] As a further solution of the present invention, a groove matching the size of the stop cover is formed on one side of the support platform away from the assembly core, and the groove is used for the stop cover to enter when the stop protrusion enters the anti-rotation groove to limit the movement of the end cover in the depth direction of the installation groove.

[0010] As a further solution of the present invention, the distance between the stop protrusion and the stop cover is L1, the distance between the anti-rotation groove in the rotor inner cavity and the end face of the rotor inlet end is L2, and the distance between the side of the support platform that abuts against the end face of the rotor inlet end and the groove is L3, L1=L2+L3.

[0011] As a further solution of the present invention, both sides of the groove in the width direction are provided with relief chamfers.

[0012] As a further solution of the present invention, the size of the assembly core matches the inner diameter of the rotor air inlet end, so that the assembly core installed into the rotor from the rotor air inlet end can contact the rotor inner cavity and position the assembly core in the rotor radial direction.

[0013] As a further solution of the present invention, a threaded hole for connecting the clamping cylinder and the splitting cylinder is provided in the square groove.

[0014] A rotor shaft end nut assembly method, using the above-mentioned rotor shaft end nut stopping tooling, comprises the following steps:

[0015] S11, insert the assembly core from the opening of the rotor air inlet end, make the support table abut against the end surface of the rotor air inlet end, and move the movable part so that the stopper protrusion enters the anti-rotation groove of the rotor inner cavity;

[0016] S12, assembling the shaft end nut onto the rotor, installing a nut wrench on the support platform, and tightening the shaft end nut onto the rotor using the nut wrench;

[0017] S13, remove the nut wrench and assembly core;

[0018] A rotor shaft end nut disassembly method, using the above-mentioned rotor shaft end nut stopping tool, comprises the following steps:

[0019] S21, insert the assembly core from the opening of the rotor air inlet end, make the support table abut against the end surface of the rotor air inlet end, and move the movable part so that the stopper protrusion enters the anti-rotation groove in the inner cavity of the rotor;

[0020] S22, installing a nut spanner on the support platform, and removing the shaft end nut from the rotor by using the nut spanner;

[0021] S23, remove the nut wrench and assembly core.

[0022] The present invention has the following beneficial effects:

[0023] The present invention provides a movable stop protrusion on the assembly core. When the stop protrusion is retracted, the assembly core can enter the rotor cavity from the rotor air inlet end. After the assembly core enters the rotor cavity, the stop protrusion can be extended to make the stop protrusion engage with the anti-rotation groove, thereby achieving the stationary state of the rotor during the subsequent assembly of the shaft end gear and the shaft end nut. The assembly core can be inserted into the rotor from the opening of the rotor air inlet end. The rotor can also achieve the installation and removal of the shaft end nut and the shaft end nut on the rotor in the assembled state. At the same time, the assembly core does not need to flip the rotor when inserted into the rotor, and the operation is simpler. At the same time, the width of the movable part in the installation groove for installing the stop protrusion matches the width of the installation groove opening. The movable part can quickly transmit torque to the assembly core and can also support the installation groove in the width direction, thereby preventing the part of the assembly core where the installation groove is opened and the movable part from being deformed under the action of torque, preventing the assembly core and the movable part from being broken, and ensuring the safe use of the device.

[0024] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 Schematic diagram of the anti-rotation groove structure in the rotor;

[0027] Figure 2 It is a schematic diagram of the assembly core structure in the present invention;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the assembly core in the present invention;

[0029] Figure 4 It is a schematic diagram of the top view structure of the assembly core in the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the stop unit in the present invention;

[0031] Figure 6 It is a schematic diagram of the structure in which the movable part is rotatably arranged in the installation groove in the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the rotor shaft end nut stop fixture and the rotor after being assembled in the present invention;

[0033] Figure 8 It is a schematic diagram of the connection between the support platform and the nut spanner in the present invention.

[0034] Legend:

[0035] 11. Assembly core; 12. Support platform; 13. Mounting groove; 14. Groove; 15. Chamfer; 16. Square groove; 17. Threaded hole; 21. Movable part; 22. Stopping protrusion; 23. Stopping cover; 31. Rotor; 32. Anti-rotation groove; 41. Tightening shaft; 42. Rotating sleeve. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0037] See also Figure 1-Figure 8 The present invention provides a technical solution: a rotor shaft end nut stop tool, comprising an assembly unit and a stop unit; the assembly unit comprises an assembly core 11 and a support platform 12, the assembly core 11 is used to be installed into the rotor 31 from the air inlet end of the rotor 31, and the support platform 12 is fixed to one end of the assembly core 11, and is used to abut against the end surface of the air inlet end of the rotor 31 to position the assembly core 11 in the axial direction of the rotor 31;

[0038] Specifically, Figure 1-Figure 2 As shown, the assembly core 11 is used to be inserted into the rotor 31 from the air inlet end of the rotor 31. The size of one end of the rotor 31 is smaller than the opening of the air inlet end of the rotor 31, so that the assembly core 11 is inserted into the rotor 31 from the air inlet end of the rotor 31. At the same time, in order to position the assembly core 11 in the axial direction of the rotor 31, a support platform 12 is fixedly provided on the end surface of the assembly core 11 away from the end of the rotor 31. The overall size of the support platform 12 is larger than or partially larger than the opening of the air inlet end of the rotor 31, so that the support platform 12 can be supported on the end surface of the air inlet end of the rotor 31. After the assembly core 11 enters the rotor 31 from the air inlet end of the rotor 31, the assembly core 11 can be positioned by the abutment between the support platform 12 and the end surface of the air inlet end of the rotor 31, and the assembly core 11 can be accurately installed in the inner cavity of the rotor 31.

[0039] A plurality of mounting grooves 13 are formed on the side of the assembly core 11, and the plurality of mounting grooves 13 are used to correspond one by one with the plurality of anti-rotation grooves 32 formed in the inner cavity of the rotor 31;

[0040] A plurality of mounting grooves 13 are provided on the side of the assembly core 11. The arrangement and spacing of the mounting grooves 13 on the assembly core 11 are designed according to the anti-rotation grooves 32 provided in the inner cavity of the rotor 31, so that after the assembly core 11 is assembled into the rotor 31, the mounting grooves 13 provided on the assembly core 11 can correspond to the anti-rotation grooves 32 one by one.

[0041] The anti-rotation grooves 32 formed in the inner cavity of the rotor 31 are arranged at equal intervals along the circumference of the rotor 31, so the mounting grooves 13 formed on the side of the assembly core 11 are also arranged at equal intervals along the circumference;

[0042] The stop unit includes a movable member 21 and a stop protrusion 22 disposed on the movable member 21. A plurality of movable members 21 are provided, and the plurality of movable members 21 are mounted in a plurality of mounting grooves 13 in a one-to-one correspondence. The movable member 21 is movably disposed in the mounting groove 13 and is used to enable the stop protrusion 22 to move into or out of the anti-rotation groove 32.

[0043] The plurality of stop units are installed in the plurality of installation grooves 13 in a one-to-one correspondence. After the assembly core 11 is inserted into the rotor 31 from the air inlet end of the rotor 31, the stop units can also correspond to the anti-rotation grooves 32 in the inner cavity of the rotor 31 in a one-to-one manner. The stop units include a movable part 21 and a stop protrusion 22 provided at one end of the movable part 21. The stop protrusion 22 is used to be plugged into and matched with the anti-rotation groove 32. Because the anti-rotation groove 32 in the inner cavity of the rotor 31 is opened along the radial direction of the rotor 31 away from the axis of the rotor 31, the size of the anti-rotation groove 32 is larger than the opening size of the air inlet end of the rotor 31. In order to prevent the stop protrusion 22 from interfering with the rotor 31 when the assembly core 11 enters the rotor 31 from the air inlet end of the rotor 31, the movable part 21 is movably arranged in the installation groove 13. The stop protrusion 22 is movable in the installation groove 13 so that the stop protrusion can move in the depth direction of the installation groove 13. When the assembly core 11 is inserted into the rotor 31 from the air inlet end of the rotor 31, the stop protrusion 22 is first moved toward the center of the assembly core 11 along the depth direction of the installation groove 13 to reduce the spacing between the stop protrusions 22, so that the assembly core 11 can be inserted into the rotor 31 from the air inlet end of the rotor 31 without hindrance. After the assembly core 11 is assembled in place in the rotor 31, the stop protrusion 22 in the installation groove 13 is aligned with the anti-rotation groove 32 opened in the inner cavity of the rotor 31. At this time, the stop protrusion 22 is moved away from the center of the assembly core 11 along the depth direction of the installation groove 13, so that the stop protrusion 22 is inserted into the anti-rotation groove 32 opened in the inner cavity of the rotor 31, and the rotor 31 is stopped during the subsequent installation and removal of the shaft end nut.

[0044] Specifically, the depth direction of the mounting groove 13 refers to the direction from the side where the mounting groove 13 opens on the side of the assembly core 11 to the side where the mounting groove 13 is close to the center of the assembly core 11;

[0045] The support platform 12 is provided with a square slot for connecting a nut wrench;

[0046] After the assembly core 11 is inserted into the rotor 31 and the stop protrusion 22 is plugged into the anti-rotation groove 32, the shaft end nut can be installed on the rotor 31. When installing the shaft end nut, a nut wrench is required. The support platform 12 is provided with a square groove 16 for installing the nut wrench.

[0047] The opening width of the installation groove 13 matches the width of the movable member 21, so that the movable member 21 always keeps in contact with both sides of the installation groove 13 in the width direction while moving in the installation groove 13;

[0048] like Figure 4-Figure 5 As shown in the figure, the width M of the movable part 21 matches the opening width N of the installation groove 13. When the movable part 21 is located in the installation groove 13, the two sides of the movable part 21 in the width direction always keep in contact with the two sides in the width direction of the installation groove 13. When the shaft end nut is tightened or removed by a nut wrench, the rotor 31 will be subjected to the tightening torque, and the rotor shaft end nut stopper is used to keep the rotor 31 stationary. Therefore, the torque exerted on the rotor 31 will be transmitted to the movable part 21 through the stopper protrusion 22, and then the contact position between the movable part 21 and the installation groove 13 is transmitted to the assembly core 11. The opening width of the mounting groove 13 is matched, and the torque can be directly transmitted to the assembly core 11 from both sides of the movable part 21 in the width direction. At the same time, the two sides of the mounting groove 13 in the width direction can be supported by the movable part 21, and the assembly core 11 is prevented from having a gap in the force direction, thereby preventing stress concentration caused by sudden changes in geometric dimensions, preventing the part of the assembly core 11 where the mounting groove 13 is opened and the movable part 21 from being deformed under the action of torque, preventing the assembly core 11 and the movable part 21 from being broken, ensuring that the assembly core 11 and the stop unit can withstand the torque when the shaft end nut is tightened, and ensuring the safety of the overall tooling;

[0049] like Figure 7 As shown, the length of the assembly core 11 is not less than the distance from the side of the anti-rotation groove 32 in the rotor 31 away from the rotor air inlet end to the end face of the rotor air inlet end. Since the stop protrusion 22 needs to be plugged into the anti-rotation groove 32, and the torque applied to the rotor during installation and removal of the shaft end nut will be transmitted to the movable part 21 through the stop protrusion 22, when the length of the assembly core 11 is not less than the distance from the side of the anti-rotation groove 32 in the rotor 31 away from the rotor air inlet end to the end face of the rotor air inlet end, the portion of the movable part 21 where the stop protrusion 22 is installed can be included in the installation groove 13. When the stop protrusion 22 is subjected to torque, the torque can be directly transmitted to the assembly core 11 through the movable part 21, and the torque does not need to be transmitted in the length direction of the movable part 21, thereby preventing the movable part 21 from bending or breaking under the action of the torque.

[0050] The tooling is provided with a movable stop protrusion 22 on the assembly core 11. When the stop protrusion 22 is retracted, the assembly core 11 can enter the inner cavity of the rotor 31 from the air inlet end of the rotor 31. After the assembly core 11 enters the inner cavity of the rotor 31, the stop protrusion 22 can be extended to make the stop protrusion 22 plug-fit with the anti-rotation groove 32, so as to achieve the stationary state of the rotor 31 during the subsequent assembly of the shaft end gear and the shaft end nut. The assembly core 11 can be inserted into the rotor 31 from the opening of the air inlet end of the rotor 31. The rotor 31 can also achieve the shaft end nut on the rotor 31 in the assembled state. The installation and removal of the nut and the shaft end nut, and the assembly core 11 does not need to flip the rotor 31 when being inserted into the rotor 31, so the operation is simpler. At the same time, the width of the movable part 21 for installing the stop protrusion 22 in the installation groove 13 matches the opening width of the installation groove 13. The movable part 21 can quickly transmit the torque to the assembly core 11 and can also support the installation groove 13 in the width direction to prevent the part of the assembly core 11 where the installation groove 13 is opened and the movable part 21 from being deformed under the action of the torque, and prevent the assembly core 11 and the movable part 21 from being broken, thereby ensuring the safe use of the device.

[0051] Furthermore, the size of the assembly core 11 matches the inner diameter of the air inlet end of the rotor 31, so that the assembly core 11 inserted into the rotor 31 from the air inlet end of the rotor 31 can contact the inner cavity of the rotor 31, and the assembly core 11 is positioned in the radial direction of the rotor 31;

[0052] The assembling core 11 can be a cylinder like the inner cavity of the rotor 31, or it can be a regular polygonal column. When the assembling core 11 is a cylinder, the diameter of the assembling core 11 matches the diameter of the inner cavity of the air inlet end of the rotor 31. When the assembling core 11 is inserted into the rotor 31 from the air inlet end of the rotor 31, the assembling core 11 can contact the inner cavity of the rotor 31 to achieve radial positioning. If the assembling core 11 is a regular polygonal column, the diameter of the circumscribed circle of the polygon matches the diameter of the inner cavity of the air inlet end of the rotor 31. After the assembling core 11 is inserted into the rotor 31 from the air inlet end of the rotor 31, it can contact the inner cavity of the rotor 31 and be positioned in the radial direction of the rotor 31, thereby ensuring the stability of the assembling core 11 after being inserted into the inner cavity of the rotor 31.

[0053] Furthermore, a threaded hole 17 for connecting the clamping cylinder and the disassembly cylinder is provided in the square groove 16. Before installing the shaft end nut, it is necessary to install the shaft end gear and other parts on the shaft neck of the rotor 31. Traditionally, when installing these shaft end parts, a puller is usually used to hook the anti-rotation groove 32 in the rotor, and then the shaft end parts are pressed axially along the rotor 31 by pressing the cylinder down so that the shaft end parts and the rotor 31 are axially matched in place. After the threaded hole 17 is provided in the square groove 16, the clamping cylinder and the subsequent disassembly cylinder used for disassembling the shaft end parts can be connected to the assembly core 11. The assembly core 11 bears the reaction force during clamping and loosening, so that the rotor shaft end nut stop tooling can adapt to the installation of other shaft end parts of the rotor 31 shaft neck.

[0054] Figure 6 The first example of the movable member 21 being installed in the installation groove 13 is shown. In this example, the movable member 21 is rotatably arranged in the installation groove 13, the stopper protrusion 22 is fixed to the end of the movable member 21 away from the support platform 12, and the end of the movable member 21 close to the support platform 12 is hinged in the installation groove 13. The rotation of the movable member 21 causes the stopper to rotate around the hinge axis of the movable member 21, so that the stopper protrusion 22 moves in the depth direction of the installation groove 13.

[0055] Figure 7 A second example of the movable member 21 being installed in the mounting groove 13 is shown. In this example, the movable member 21 is slidably arranged in the mounting groove 13 along the depth direction of the mounting groove 13. The stopper protrusion 22 is fixed to the end of the movable member 21 away from the support platform 12. The position of the stopper protrusion 22 is adjusted by sliding the movable member 21 in the mounting groove 13.

[0056] Furthermore, the mounting groove 13 extends to a side of the support platform 12 away from the assembly core 11, and the movable member 21 is provided with a driving end extending from a side of the support platform 12 away from the assembly core 11;

[0057] When inserting the assembling core 11 into the rotor 31 from the air intake end of the rotor 31, it is necessary to first make the stop protrusion 22 close to the center of the assembling core 11 in the depth direction of the mounting groove 13 so that the stop protrusion 22 does not interfere with the rotor 31. When the assembling core 11 is inserted into the rotor 31 and assembled in place, it is necessary to slide or rotate the movable part 21 to make the stop protrusion 22 away from the center of the assembling core 11 in the depth direction of the mounting groove 13, so that the stop protrusion 22 is inserted into the anti-rotation groove 32 of the inner cavity of the rotor 31. At this time, the assembling core 11 has been fully inserted into the rotor 31. In order to facilitate the operation of the movable part 21, the mounting groove 13 is connected to the side of the support platform 12 away from the assembling core 11, and a driving end is provided on the movable part 21. The driving end of the movable part 21 extends out from the opening of the mounting groove 13 on the support platform 12. In this way, after the assembling core 11 is fully inserted into the rotor 31, the movable part 21 can also be easily operated by the driving end, thereby adjusting the position of the stop protrusion 22 in the width direction of the mounting groove 13.

[0058] The following is a further description of a second example in which the movable member 21 is installed in the installation groove 13;

[0059] Furthermore, a stop cover 23 is fixedly provided at the driving end of the movable member 21. The stop cover 23 has a larger dimension in the width direction of the movable member 21 than the movable member 21 and is used to contact with a side of the support platform 12 away from the assembly core 11 to position the movable member 21 in the length direction of the assembly core 11.

[0060] In order to allow the movable member 21 to have a certain movable space in the installation groove 13 to adjust the position of the stop protrusion 22, the installation groove 13 has a certain length in the depth direction. When the movable member 21 is slidably arranged in the installation groove 13, the movable member 21 may be tilted and completely enter the installation groove 13. Therefore, a stop cover 23 is fixedly arranged at the driving end of the movable member 21. The stop cover 23 is larger than the installation groove 13, so that the movable member 21 can be prevented from completely entering the installation groove 13 and the movable member 21 can be positioned in the length direction of the assembly core 11.

[0061] Furthermore, a groove 14 matching the size of the stop cover 23 is formed on one side of the support platform 12 away from the assembly core 11. The groove 14 is used for the stop cover 23 to enter when the stop protrusion 22 enters the anti-rotation groove 32, so as to limit the movement of the end cover in the depth direction of the installation groove 13.

[0062] When the movable part 21 is slidably arranged in the installation groove 13, in order to prevent the movable part 21 from moving during the subsequent assembly process of the shaft end gear and the shaft end nut, a groove 14 is provided on the side of the support platform 12 away from the assembly core 11, and the size of the groove 14 matches the size of the stop cover 23. When the movable part 21 moves to make the stop protrusion 22 enter the anti-rotation groove 32, the stop cover 23 at the end of the movable part 21 away from the stop protrusion 22 can just enter the groove 14, and the movement of the movable part 21 in the depth direction of the installation groove 13 is limited by the groove 14, thereby preventing the stop protrusion 22 from being separated from the anti-rotation groove 32, thereby ensuring the safety during the subsequent installation process of the shaft end gear and the shaft end bolt;

[0063] Specifically, the distance between the stop protrusion 22 and the stop cover 23 is L1, the distance between the anti-rotation groove 32 in the inner cavity of the rotor 31 and the inlet end surface of the rotor 31 is L2, and the distance between the side of the support platform 12 that is used to abut against the inlet end surface of the rotor 31 and the groove 14 is L3, L1 = L2 + L3;

[0064] like Figure 5 As shown, the distance between the stop protrusion 22 and the stop cover 23 is L1. Figure 7 As shown, the distance between the anti-rotation groove 32 in the inner cavity of the rotor 31 and the inlet end surface of the rotor 31 is L2. Figure 3As shown, the spacing between the side of the support platform 12 that abuts against the end face of the air inlet end of the rotor 31 and the groove 14 is L3. When L1=L2+L3, when the stop protrusion 22 abuts against the end face of the anti-rotation groove 32 close to the air inlet end of the rotor 31 in the anti-rotation groove 32, the end face of the stop cover 23 facing the stop protrusion 22 just contacts the bottom surface of the groove 14. In other words, the movable part 21 cannot move in the length direction of the assembly core 11. When installing the shaft end gear, the clamping cylinder needs to be fixed on the support platform 12 to apply downward pressure to the shaft end gear. At this time, the clamping cylinder is subjected to an upward reaction force. When the movable part 21 is completely fixed in the length direction of the assembly core 11, that is, in the vertical direction, the downward pressure cylinder can be stably fixed to ensure that the downward pressure cylinder will not move in the vertical direction when the shaft end gear is installed by the downward pressure cylinder, thereby improving the installation stability of the downward pressure cylinder.

[0065] Both sides of the groove 14 in the width direction are provided with a relief chamfer 15;

[0066] like Figure 7 As shown, when L1=L2+L3, the stop protrusion 22 can enter the anti-rotation groove 32 opened in the inner cavity of the rotor 31 only when the stop cover 23 enters the groove 14. If it is necessary to insert the stop protrusion 22 into the anti-rotation groove 32, it is necessary to first tilt the end of the movable part 21 on which the stop protrusion 22 is installed toward the center of the assembly core 11, and then put the stop cover 23 into the groove 14, and then restore the movable part 21 to a vertical state so that the stop protrusion 22 enters the anti-rotation groove 32. At the same time, to separate the stop protrusion 22 from the anti-rotation groove 32, it is also necessary to tilt the movable part 21 first, as shown in FIG. Figure 3 As shown, both sides of the groove 14 in the width direction are provided with a paving chamfer 15 to make room for the tilting of the stop cover 23 so that the stop protrusion 22 can smoothly enter or leave the anti-rotation groove 32.

[0067] A rotor shaft end nut assembly method, using the above-mentioned rotor shaft end nut stopping tooling, comprises the following steps:

[0068] S11, insert the assembly core 11 from the air inlet end opening of the rotor 31, and make the support platform 12 abut against the end surface of the air inlet end of the rotor 31, and move the movable member 21 so that the stopper protrusion 22 enters the anti-rotation groove 32 of the inner cavity of the rotor 31;

[0069] S12, assembling the shaft end gear onto the rotor 31, and installing a clamping cylinder on the support platform 12, and axially fitting the shaft end gear and the rotor 31 into place through the clamping cylinder;

[0070] S13, remove the clamping oil cylinder, assemble the shaft end nut onto the rotor 31, install a nut wrench on the support platform 12, and tighten the shaft end nut onto the rotor 31 using the nut wrench;

[0071] S14, remove the nut wrench and assembly core 11.

[0072] A rotor shaft end nut disassembly method, using the above-mentioned rotor shaft end nut stopping tool, comprises the following steps:

[0073] S21, insert the assembly core 11 from the air inlet end opening of the rotor 31, and make the support platform 12 abut against the end surface of the air inlet end of the rotor 31, and move the movable member 21 so that the stopper protrusion 22 enters the anti-rotation groove 32 of the inner cavity of the rotor 31;

[0074] S22, installing a nut wrench on the support platform 12, and removing the shaft end nut from the rotor 31 by using the nut wrench;

[0075] S23, remove the nut wrench, assemble a disassembly cylinder on the support platform 12, and disassemble the shaft end gear from the rotor 31 through the disassembly cylinder;

[0076] S24, dismantling the oil cylinder and assembling the core 11;

[0077] like Figure 8 As shown, the nut wrench includes a tightening shaft 41 and a rotating sleeve 42. The tightening shaft 41 includes a rotating part and a stator in the rotating part. The stator is used to connect with the square slot 16 and keep still with the support platform. The rotating part is used to connect with the rotating sleeve 42 to drive the rotating sleeve 42 to rotate. The bottom end of the rotating sleeve 42 is provided with a slot matching the shape of the shaft end nut.

[0078] When in use, the stator is first plugged into the square slot 16 , and then the rotating sleeve 42 is driven to rotate by the rotating part, and the shaft end nut is tightened onto the rotor 31 by rotating the rotating sleeve 42 .

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotor shaft end nut locking tool, characterized in that: including an assembly unit and a stop unit; The assembly unit comprises an assembly core (11) and a support platform (12); the assembly core (11) is used to be installed into the rotor (31) from the air inlet end of the rotor (31); the support platform (12) is fixed to one end of the assembly core (11) and is used to abut against the end surface of the air inlet end of the rotor (31) to position the assembly core (11) in the axial direction of the rotor (31); a plurality of installation grooves (13) are provided on the side surface of the assembly core (11); the plurality of installation grooves (13) are used to correspond one by one to a plurality of anti-rotation grooves (32) provided in the inner cavity of the rotor (31); The stop unit comprises a movable member (21) and a stop protrusion (22) arranged on the movable member (21); a plurality of movable members (21) are provided, and the plurality of movable members (21) are installed in a plurality of installation grooves (13) in a one-to-one correspondence; the movable member (21) is movably arranged in the installation groove (13) and is used to enable the stop protrusion (22) to move into or out of the anti-rotation groove (32); The support platform (12) is provided with a square groove (16) for connecting a nut wrench; The opening width of the mounting groove (13) matches the width of the movable member (21), so that the movable member (21) always maintains contact with both sides of the mounting groove (13) in the width direction while moving in the mounting groove (13), and the length of the assembly core (11) is not less than the distance from the side of the anti-rotation groove (32) in the rotor (31) away from the rotor air inlet end to the end face of the rotor air inlet end.

2. A rotor shaft end nut locking fixture according to claim 1, characterized in that: The mounting groove (13) extends to a side of the support platform (12) away from the assembly core (11), and the movable member (21) is provided with a driving end extending from a side of the support platform (12) away from the assembly core (11).

3. A rotor shaft end nut locking tool according to claim 2, characterized in that: A stop cover (23) is provided at the driving end of the movable part (21). The stop cover (23) is larger than the movable part (21) in the width direction of the movable part (21) and is used to contact a side of the support platform (12) away from the assembly core (11) to position the movable part (21) in the length direction of the assembly core (11).

4. A rotor shaft end nut locking tool according to claim 3, characterized in that: A groove (14) matching the size of the stop cover (23) is formed on one side of the support platform (12) away from the assembly core (11). The groove (14) is used for the stop cover (23) to enter when the stop protrusion (22) enters the anti-rotation groove (32), so as to limit the movement of the end cover in the depth direction of the installation groove (13).

5. A rotor shaft end nut locking tool according to claim 4, characterized in that: The spacing between the stop protrusion (22) and the stop cover (23) is L1, the spacing between the anti-rotation groove (32) in the inner cavity of the rotor (31) and the air inlet end face of the rotor (31) is L2, and the spacing between the surface of the support platform (12) that abuts against the air inlet end face of the rotor (31) and the groove (14) is L3, and L1=L2+L3.

6. A rotor shaft end nut locking tool according to claim 4 or 5, characterized in that: Both sides of the groove (14) in the width direction are provided with relief chamfers (15).

7. The rotor shaft end nut locking tool according to claim 1, characterized in that: The size of the assembly core (11) matches the inner diameter of the air inlet end of the rotor (31), so that the assembly core (11) inserted into the rotor (31) from the air inlet end of the rotor (31) can contact the inner cavity of the rotor (31), and the assembly core (11) is positioned in the radial direction of the rotor (31).

8. The rotor shaft end nut locking tool according to claim 1, characterized in that: The square groove (16) is provided with a threaded hole (17) for connecting the pressing oil cylinder and the splitting oil cylinder.

9. A method for assembling a rotor shaft end nut, characterized in that: The rotor shaft end nut stopping tooling according to any one of claims 1 to 8 comprises the following steps: S11, inserting the assembly core (11) from the air inlet end opening of the rotor (31), making the support platform (12) abut against the end surface of the air inlet end of the rotor (31), and moving the movable member (21) so that the stopper protrusion (22) enters the anti-rotation groove (32) in the inner cavity of the rotor (31); S12, assembling the shaft end nut onto the rotor (31), installing a nut wrench on the support platform (12), and tightening the shaft end nut onto the rotor (31) using the nut wrench; S13, remove the nut wrench and the assembly core (11).

10. A method for disassembling a rotor shaft end nut, characterized in that: The rotor shaft end nut stopping tooling according to any one of claims 1 to 8 comprises the following steps: S21, inserting the assembly core (11) from the air inlet end opening of the rotor (31), making the support platform (12) abut against the end surface of the air inlet end of the rotor (31), and moving the movable member (21) so that the stopper protrusion (22) enters the anti-rotation groove (32) in the inner cavity of the rotor (31); S22, installing a nut spanner on the support platform (12), and removing the shaft end nut from the rotor (31) by using the nut spanner; S23, remove the nut wrench and the assembly core (11).

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