CN220178612U - Screw assembly and disassembly tools, nut assembly and screw and nut assembly and disassembly tool assembly - Google Patents

Abstract

The screw dismounting tool comprises a first main body part, a clamping part and a first spanner matching part, wherein a first end of the first main body part can penetrate through a vent hole on a wind shield of a turbine generator so as to be close to a conductive screw, and a second end of the first main body part can be positioned at the outer side of the wind shield of the turbine generator; the clamping part is arranged at the first end of the first main body part and is configured to be clamped with a groove on the head part of the conductive screw; the first wrench engagement portion is disposed at the second end of the first body portion and is configured to be engageable with a torque wrench. An operator can detach the conductive screw from the outer side of the wind shield of the steam turbine generator through the screw dismounting tool so as to check the use state of the conductive screw without waiting for disassembly overhaul of the steam turbine generator, so that the overhaul frequency of the conductive screw is improved, the overhaul period of the conductive screw is shortened, and the safe and stable operation of the steam turbine generator is ensured.

Description

Screw assembly and disassembly tools, nut assembly and screw and nut assembly and disassembly tool assembly

Technical Field

The present disclosure relates to the field of turbine generator component disassembly and assembly technology, and in particular, to a screw disassembly and assembly tool, a nut disassembly and assembly tool, and a screw and nut disassembly and assembly tool assembly.

Background

The turbine generator is a generator driven by a turbine, and superheated steam generated by a boiler enters the turbine to expand and work, so that blades rotate to drive the generator to generate electricity.

The rotor winding of the turbo generator usually adopts hydrogen internal cooling, a rotor radial conductive screw connects a rotor J-shaped lead with an axial conductive rod in a central hole of a rotating shaft, plays a role of connecting an excitation loop, and a conductive screw sealing ring is arranged on the conductive screw and is tightly pressed by a pressing nut for sealing. Due to the influence of mechanical force of high-speed rotation of the turbogenerator and the service life of the sealing ring of the conductive screw, the conductive screw and/or the compression nut need to be checked regularly, but due to the fact that the conductive screw and/or the compression nut are located in the turbogenerator, the conductive screw and/or the compression nut can be detached only after the shell of the turbogenerator is disassembled and the rotor is lifted out of the shell after the turbogenerator is overhauled, so that the state of the conductive screw and/or the compression nut is checked, and the overhaul frequency of the conductive screw and/or the compression nut is lower.

Disclosure of Invention

The purpose of this disclosure is to provide a screw assembly and disassembly tools, nut assembly and screw and nut assembly and disassembly tools subassembly to solve the technical problem that exists among the related art.

In order to achieve the above object, according to a first aspect of the present disclosure, there is provided a screw assembling and disassembling tool, including a first main body portion, a clamping portion and a first wrench mating portion, a first end of the first main body portion being capable of passing through a vent hole on a turbine generator wind shield to be close to the conductive screw, a second end of the first main body portion being capable of being located outside the turbine generator wind shield; the clamping part is arranged at the first end of the first main body part and is configured to be clamped with a groove on the head part of the conductive screw; the first wrench engagement portion is disposed at the second end of the first body portion and is configured to be engageable with a torque wrench.

Optionally, the clamping portion is a protruding claw protruding from the first end of the first body portion, the protruding claw includes a plurality of claw portions, the plurality of claw portions are arranged at intervals along the circumferential direction of the first body portion, and each claw portion extends along the radial direction of the first body portion; the first spanner matching part and the first main body part are integrally formed, the clamping part is welded at the first end of the first main body part, and the section of the first spanner matching part is formed into a hexagon.

Optionally, the sum of the length of the first body portion and the length of the first wrench mating portion is equal to or greater than 361mm.

Optionally, the clamping portion is made of 42CrMo steel, and the first body portion and the first wrench mating portion are made of 42Cr steel.

Through the technical scheme, as the first end of the first main body part can penetrate through the vent hole on the turbine generator windshield and is close to the conductive screw, the clamping part at the first end of the first main body part can be clamped with the groove on the head of the conductive screw, and the second end of the first main body part can be positioned on the outer side of the turbine generator windshield so that an operator can operate the first main body part on the outer side of the turbine generator windshield, and therefore, when the conductive screw is dismounted, the operator can stretch the screw dismounting tool into the turbine generator from the turbine generator windshield to dismount the conductive screw. The operating personnel need not wait for the turbo generator to disassemble and overhaul (namely, dismantle the turbo generator shell and hoist the rotor out of the shell) and can dismantle the conductive screw and check the use state of the conductive screw, and the operating personnel can dismantle the conductive screw from the outer side of the turbo generator windshield through a screw dismounting tool and check the use state of the conductive screw under the condition that the turbo generator is not disassembled, so that the maintenance frequency of the conductive screw can be improved, the maintenance period of the conductive screw is shortened, the safe and stable operation of the turbo generator is ensured, and the workload of the conductive screw during maintenance is reduced.

In addition, when joint portion joint in conductive screw, the second end of first main part can be located the outside of turbo generator windshield, first spanner cooperation portion sets up the second end of first main part and first spanner cooperation portion can cooperate with the moment spanner, therefore, when conductive screw dismouting, operating personnel can locate first spanner cooperation portion with the moment spanner cover, disassemble and assemble conductive screw through the moment spanner to satisfy conductive screw's dismouting technological requirement, effectively avoided conductive screw to appear not hard up condition emergence because of installation moment error when installing simultaneously.

According to a second aspect of the present disclosure, there is provided a nut attaching and detaching tool, including a second main body portion, a locating pin, and a second wrench engagement portion, a first end of the second main body portion being capable of passing through a vent hole in a turbine generator windshield to be adjacent to the compression nut, a second end of the second main body portion being capable of being located outside the turbine generator windshield; the locating pin is arranged at the first end of the second main body part and is used for being inserted into the through hole on the compression nut; the second wrench engagement portion is disposed at a second end of the second body portion and is configured to be engageable with a torque wrench.

Optionally, the plurality of positioning pins are arranged at intervals along the circumferential direction of the second main body part.

Optionally, the second main body part includes a first mounting plate and a second mounting plate which are oppositely arranged, and a connecting plate connected between the first mounting plate and the second mounting plate, and the second wrench matching part is arranged at one side of the second mounting plate, which is away from the connecting plate; the positioning pins are arranged on one side, deviating from the connecting plate, of the first mounting plate, an avoidance notch is formed in the first mounting plate and used for avoiding a conductive screw of a rotor of the steam turbine generator.

Optionally, the second spanner mating portion includes mount pad and spanner mating portion body, spanner mating portion body installs on the mount pad, spanner mating portion body's cross-section forms into the hexagon, be formed with the mounting hole on the mount pad, be formed with the screw hole on the second mounting panel, fastening bolt passes the mounting hole and in screw hole threaded connection.

Optionally, the sum of the length of the second body portion and the length of the second wrench mating portion is equal to or greater than 169mm.

Through the technical scheme, as the first end of the second main body part can penetrate through the vent hole on the turbine generator windshield and is close to the compression nut, the positioning pin positioned at the first end of the second main body part can be inserted into the through hole on the compression nut, and the second end of the second main body part can be positioned at the outer side of the turbine generator windshield so as to enable an operator to operate the second main body part at the outer side of the turbine generator windshield, thus, when the compression nut is dismounted, the operator can stretch the nut dismounting tool into the turbine generator from the windshield of the turbine generator to dismount the compression nut. The operating personnel need not wait for turbo generator overhaul to disassemble (namely dismantle turbo generator's casing and go out the casing with rotor hoist) just can dismantle the gland nut, and operating personnel can dismantle the gland nut and inspect the gland nut through nut assembly and disassembly tool from the outside of turbo generator windshield under the condition that turbo generator does not disintegrate to can improve gland nut's maintenance frequency, shorten gland nut's maintenance cycle, guaranteed turbo generator's safe and stable operation, reduced gland nut work load when overhauling simultaneously.

In addition, when the locating pin inserts in the through-hole on the gland nut, the second end of second main part can be located the outside of turbo generator windshield, and second spanner cooperation portion sets up the second end of second main part and second main part can cooperate with the moment spanner, therefore, when gland nut dismouting, operating personnel can locate second spanner cooperation portion with the moment spanner, disassemble and assemble gland nut through the moment spanner to satisfy gland nut's dismouting technological requirement, effectively avoided gland nut installation unstability to lead to the condition emergence of hydrogen leakage simultaneously.

According to a third aspect of the present disclosure, there is provided a screw and nut assembly and disassembly tool assembly for assembling and disassembling a compression nut of a conductive screw and conductive screw seal ring of a turbine generator rotor, comprising a screw assembly and disassembly tool as described above and a nut assembly and disassembly tool as described above.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a screw removing tool according to an exemplary embodiment of the present disclosure.

Fig. 2 is a schematic perspective view of a nut removing tool according to an exemplary embodiment of the present disclosure.

Fig. 3 is a schematic perspective view of a second wrench engagement portion of a nut removing tool according to an exemplary embodiment of the present disclosure.

Fig. 4 is a schematic assembly view of a conductive screw, a compression nut, and a conductive screw seal ring of a turbo generator.

Description of the reference numerals

1-a first body portion; 2-clamping parts; 3-a first wrench mating part; 21-claws; 211-claw parts; 4-a second body portion; 41-a first mounting plate; 42-a second mounting plate; 43-connecting plates; 411-avoiding gaps; 421-threaded holes; 5-locating pins; 6-a second wrench mating part; 61-mounting seats; 611-mounting holes; 62-a wrench mating part body; 7-conductive screws; 8-pressing a screw cap; 9-conductive screw sealing rings.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, terms such as "inner" and "outer" are used to refer to inner and outer relative to the outline of the corresponding component itself, and terms such as "first" and "second" are used to distinguish one element from another without order or importance.

As shown in fig. 1, according to a first aspect of the present disclosure, there is provided a screw assembling and disassembling tool including a first main body portion 1, a clamping portion 2 and a first wrench fitting portion 3, a first end of the first main body portion 1 being capable of passing through a vent hole on a turbine generator wind shield to be close to a conductive screw 7, a second end of the first main body portion 1 being capable of being located outside the turbine generator wind shield, the clamping portion 2 being disposed at the first end of the first main body portion 1 and configured to be capable of being clamped with a groove on a head of the conductive screw 7, the first wrench fitting portion 3 being disposed at the second end of the first main body portion 1 and configured to be capable of being fitted with a torque wrench.

When the operator needs to detach the conductive screw 7 to inspect the state of the conductive screw 7, the operator can sleeve the torque wrench on the first wrench matching part 3 and stretch the first main body part 1 into the steam turbine generator from the vent hole of the wind shield of the steam turbine generator, so that the clamping part 2 positioned on the first main body part 1 can be clamped with the groove on the head of the conductive screw 7, and then the operator rotates the clamping part 2 through rotating the torque wrench to drive the conductive screw 7 to rotate, so that the conductive screw 7 can be disassembled without disassembling the steam turbine generator, namely without disassembling the rotor. When installing the conductive screw 7, an operator can clamp the conductive screw 7 on the clamping part 2, extend the first main body part 1 into the inner side of the steam turbine generator from the vent hole of the wind shield of the steam turbine generator, and then rotate the clamping part 2 through a rotating torque wrench, so that the installation of the conductive screw 7 is realized.

Through the above technical scheme, because the first end of the first main body part 1 can pass through the vent hole on the turbine generator windshield and is close to the conductive screw 7, so that the clamping part 2 positioned at the first end of the first main body part 1 can be clamped with the groove on the head of the conductive screw 7, and the second end of the first main body part 1 can be positioned at the outer side of the turbine generator windshield to allow an operator to operate the first main body part 1 at the outer side of the turbine generator windshield, thus, when the conductive screw 7 is dismounted, the operator can stretch the screw dismounting tool into the turbine generator from the turbine generator windshield to dismount the conductive screw 7. The operating personnel need not wait for the turbo generator to disassemble and overhaul (namely, dismantle the turbo generator shell and hoist the rotor out of the shell) just can dismantle the conductive screw 7 and check the use state of the conductive screw, and the operating personnel can dismantle the conductive screw 7 from the outer side of the turbo generator windshield through a screw disassembling tool and check the use state of the conductive screw 7 under the condition that the turbo generator is not disassembled, so that the maintenance frequency of the conductive screw 7 can be improved, the maintenance period of the conductive screw 7 is shortened, the safe and stable operation of the turbo generator is ensured, and the workload of the conductive screw 7 during maintenance is reduced.

In addition, when joint portion 2 joint in electrically conductive screw 7, the second end of first main part 1 can be located the outside of turbo generator windshield, first spanner cooperation portion 3 sets up the second end of first main part 1 and first spanner cooperation portion 3 can cooperate with the moment spanner, therefore, when electrically conductive screw 7 dismouting, operating personnel can locate first spanner cooperation portion 3 with the moment spanner cover, carry out the dismouting to electrically conductive screw 7 through the moment spanner, in order to satisfy electrically conductive screw 7's dismouting technological requirement, simultaneously effectively avoided electrically conductive screw 7 to appear not hard up condition emergence because of installation moment error makes electrically conductive screw 7 during the installation.

In order to avoid breakage and damage of the clamping portion 2 due to torque when the conductive screw 7 is assembled and disassembled, the clamping portion 2 is optionally made of 42CrMo steel, and the first main body portion 1 and the first wrench engagement portion 3 are made of 42Cr steel. Because the clamping part 2 is made of 42CrMo steel, and the Brinell hardness of the 42CrMo steel is HB 248-311, the toughness of the clamping part 2 is better, the condition that the clamping part 2 is easily damaged due to larger torque when the conductive screw 7 is disassembled and assembled is effectively avoided, and the service life of the clamping part 2 is prolonged.

In addition, it can be appreciated that since the first main body portion 1 and the first wrench engagement portion 3 are made of 42Cr steel, the manufacturing costs of the first main body portion 1 and the first wrench engagement portion 3 are low, and the manufacturing costs of the screw assembling and disassembling tool are effectively saved.

In order to ensure that the first wrench engagement portion 3 can be always located outside the turbine-generator windshield when the first body portion 1 extends into the turbine-generator from the turbine-generator windshield, optionally, the sum of the length of the first body portion 1 and the length of the first wrench engagement portion 3 is equal to or greater than 361mm. Therefore, the situation that an operator cannot assemble and disassemble the conductive screw 7 from the outer side of the wind shield of the turbogenerator due to insufficient length of the screw assembling and disassembling tool can be effectively avoided.

Alternatively, as shown in fig. 1, the engaging portion 2 is a claw 21 protruding from the first end of the first body portion 1, the claw 21 including a plurality of claw portions 211, the plurality of claw portions 211 being disposed at intervals along the circumferential direction of the first body portion 1, each claw portion 211 extending in the radial direction of the first body portion 1. Because the claw 21 includes a plurality of claw portions 211, a plurality of claw portions 211 set up along the circumference interval of first main part 1, every claw portion 211 all extends along the radial of first main part 1, when electrically conductive screw 7 dismouting, a plurality of claw portions 211 all joint is in the recess on the electrically conductive screw 7 head, the lateral wall of a plurality of claw portions 211 extrudees each other with the lateral wall of the recess on the electrically conductive screw 7 head, joint portion 2 and electrically conductive screw 7's joint is reliable, the condition emergence of joint portion 2 and electrically conductive screw 7 slippage influence electrically conductive screw 7 dismouting when effectively having avoided electrically conductive screw 7 dismouting.

Alternatively, as shown in fig. 1, the number of the claw portions 211 may be four, and four claw portions 211 are arranged at intervals along the circumferential direction of the first body portion 1, and an included angle between every two adjacent claw portions 211 is 90 °. As other embodiments, the number of the claw portions 211 may be two, the two claw portions 211 may cross and form a cross shape or an X shape, or the two claw portions 211 may be collinear and form a line shape, and the specific number and arrangement of the claw portions 211 are not limited in this disclosure.

As an embodiment, the engaging portion 2 may be fixed to the first body portion 1 by welding, or as another embodiment, the engaging portion 2 may be integrally formed with the first body portion 1, which is not limited in the present disclosure.

In order to facilitate the processing of the screw assembling and disassembling tool, the first wrench engagement portion 3 is optionally integrally formed with the first body portion 1. As another embodiment, the first wrench engagement portion 3 and the first body portion 1 may be separately processed, and the first wrench engagement portion 3 and the first body portion 1 may be connected by welding, which is not limited in this disclosure.

In order to facilitate the connection of the torque wrench to the first wrench matching portion 3, as an embodiment, the cross section of the first wrench matching portion 3 is formed into a hexagon, and since the cross section of the first wrench matching portion 3 is formed into a hexagon, the torque wrench may be directly sleeved on the first wrench matching portion 3. As another embodiment, the first wrench engagement section 3 may be formed in a quadrangular or octagonal cross section, which is not limited in the present disclosure.

Alternatively, the first body part 1 may be formed as a hollow rod, thereby reducing the weight of the screw assembling and disassembling tool while satisfying the strength requirement.

As shown in fig. 2 to 3, according to a second aspect of the present disclosure, there is provided a nut removing tool for removing a compression nut 8 of a conductive screw seal 9 of a turbo generator rotor, including a second body portion 4, a positioning pin 5, and a second wrench engagement portion 6, a first end of the second body portion 4 being capable of passing through a through hole in a turbo generator windshield to be close to the compression nut 8, a second end of the second body portion 4 being capable of being located outside the turbo generator windshield, the positioning pin 5 being disposed at the first end of the second body portion 4 and being used for inserting the through hole in the compression nut 8, the second wrench engagement portion 6 being disposed at the second end of the second body portion 4 and being configured to be capable of being engaged with a torque wrench.

When the operator needs to detach the compression nut 8 to inspect the state of the compression nut 8, the operator can locate the second spanner matching portion 6 with the torque spanner, and stretch the second main body portion 4 into the interior of the turbine generator from the windshield of the turbine generator, so that the locating pin 5 located on the second main body portion 4 can be inserted into the through hole on the compression nut 8, and then the operator rotates the locating pin 5 along the circumferential direction of the second main body portion 4 through the rotation torque spanner to drive the compression nut 8 to rotate, so that the turbine generator can not be disassembled, namely the disassembly of the compression nut 8 can be realized under the condition that the rotor is not disassembled. When the compression nut 8 is installed, an operator can insert the positioning pin 5 into the through hole on the compression nut 8, extend the second main body part 4 into the inner side of the turbine generator from the vent hole of the wind shield of the turbine generator, and then rotate the compression nut 8 through a rotating torque wrench, so that the installation of the compression nut 8 is realized.

Through the above technical scheme, because the first end of the second main body part 4 can pass through the vent hole on the turbine generator windshield and is close to the compression nut 8, so that the locating pin 5 at the first end of the second main body part 4 can be inserted into the through hole on the compression nut 8, and the second end of the second main body part 4 can be positioned at the outer side of the turbine generator windshield to allow an operator to operate the second main body part 4 at the outer side of the turbine generator windshield, thus, when the compression nut 8 is disassembled and assembled, the operator can stretch the nut disassembly tool into the turbine generator from the windshield of the turbine generator to disassemble and assemble the compression nut 8. The operating personnel need not wait for turbo generator overhaul to disassemble (namely dismantle turbo generator's casing and go out the casing with rotor hoist) just can dismantle gland nut 8, and operating personnel can dismantle gland nut 8 and inspect gland nut 8 through nut assembly and disassembly tool from the outside of turbo generator windshield under the condition that turbo generator does not disintegrate to can improve gland nut 8's maintenance frequency, shorten gland nut 8's maintenance cycle, guaranteed turbo generator's safe and stable operation, reduced gland nut 8 work load when overhauling simultaneously.

In addition, when locating pin 5 inserts in the through-hole on the gland nut 8, the second end of second main part 4 can be located the outside of turbo generator windshield, second spanner cooperation portion 6 sets up the second end of 4 and second main part 4 can cooperate with the moment spanner in second main part, therefore, when gland nut 8 dismouting, operating personnel can locate second spanner cooperation portion 6 with the moment spanner cover, carry out the dismouting to gland nut 8 through the moment spanner to satisfy gland nut 8's dismouting technological requirement, effectively avoided gland nut 8 installation unstability to lead to the condition emergence of hydrogen leakage simultaneously.

In order to avoid the positioning pin 5 from being damaged by force when the compression nut 8 is disassembled, the positioning pin 5 may alternatively be made of 42CrMo steel, and the second body portion 4 and the second wrench mating portion 6 may be made of 42Cr steel. Because the locating pin 5 is made of 42CrMo steel, and the Brinell hardness of the 42CrMo steel is HB 248-311, the toughness of the locating pin 5 is higher, the situation that the locating pin 5 is easily damaged due to larger torque when the compression nut 8 is disassembled and assembled is effectively avoided, and the service life of the locating pin 5 is prolonged.

In addition, it can be appreciated that since the second main body portion 4 and the second wrench engaging portion 6 are made of 42Cr, the manufacturing costs of the second main body portion 4 and the second wrench engaging portion 6 are low, and the manufacturing costs of the nut removing tool are effectively saved.

In order to ensure that the second body portion 4 can always be located outside the turbine generator windshield when extending into the turbine generator from the vent hole in the turbine generator windshield, optionally, the sum of the length of the second body portion 4 and the length of the second wrench mating portion 6 is equal to or greater than 169mm. That is, when the second main body portion 4 stretches into the inner side of the turbine generator from the turbine generator windshield, and the positioning pin 5 is inserted into the through hole in the compression nut 8, the second wrench matching portion 6 can be always located on the outer side of the turbine generator windshield, so that the condition that an operator cannot assemble and disassemble the compression nut 8 from the outer side of the turbine generator windshield due to insufficient length of the nut disassembling tool is effectively avoided.

In order to avoid the positioning pins 5 from slipping off the compression nut 8 when the compression nut 8 is assembled and disassembled, optionally, the positioning pins 5 are multiple, and the positioning pins 5 are arranged at intervals along the circumferential direction of the second body portion 4. Because a plurality of locating pins 5 set up along the circumference interval of second main part 4, when the dismouting of gland nut 8, a plurality of locating pins 5 homoenergetic inserts in the through-hole on the gland nut 8, the lateral wall of a plurality of locating pins 5 extrudees each other with the lateral wall of the through-hole on the gland nut 8, has effectively avoided the condition emergence of gland nut 8 dismouting influenced by locating pin 5 and gland nut 8 slippage during the dismouting of gland nut 8.

The number of the positioning pins 5 may be two or more, and the present disclosure is not limited thereto. As an embodiment, as shown in fig. 2, the number of the positioning pins 5 may be four, and the four positioning pins 5 may be uniformly spaced along the circumferential direction of the second body portion 4.

In order to avoid interference between the conductive screw 7 and the nut dismounting tool when the compression nut 8 is dismounted, optionally, the second main body portion 4 comprises a first mounting plate 41 and a second mounting plate 42 which are oppositely arranged, and a connecting plate 43 connected between the first mounting plate 41 and the second mounting plate 42, the second wrench matching portion 6 is arranged on one side of the second mounting plate 42 deviating from the connecting plate 43, the plurality of positioning pins 5 are arranged on one side of the first mounting plate 41 deviating from the connecting plate 43, an avoidance gap 411 is formed on the first mounting plate 41, and the avoidance gap 411 is used for avoiding the conductive screw 7 of the rotor of the turbo generator. That is, when the compression nut 8 is disassembled, the conductive screw 7 and the first mounting plate 41 do not interfere, the first mounting plate 41 can penetrate through the conductive screw 7 to enable the plurality of positioning pins 5 to be inserted into the through holes on the compression nut 8, so that the situation that the positioning pins 5 cannot be inserted into the through holes on the compression nut 8 due to interference between the conductive screw 7 and the nut disassembling tool when the compression nut 8 is disassembled is effectively avoided.

As an embodiment, as shown in fig. 2, the first mounting plate 41 and the connection plate 43 may each be formed in a circular arc shape, and the second mounting plate 42 may be a circular plate. As other embodiments, the first and second mounting plates 41 and 42 may be formed as annular plates, and the above-described connection plate 43 may be formed as a cylindrical shape, which is not limited in this disclosure.

In order to facilitate the mounting of the second wrench engaging portion 6 on the second mounting plate 42, optionally, as shown in fig. 3, the second wrench engaging portion 6 includes a mounting seat 61 and a wrench engaging portion body 62, the wrench engaging portion body 62 is mounted on the mounting seat 61, the wrench engaging portion body 62 is formed in a hexagonal cross section, a mounting hole 611 is formed on the mounting seat 61, a threaded hole 421 is formed on the second mounting plate 42, and a fastening bolt passes through the mounting hole 611 and is screwed to the threaded hole 421. Because the fastening bolt passes through the mounting hole 611 on the mounting seat 61 and is in threaded connection with the threaded hole 421 on the second mounting plate 42, if the second main body part 4 is damaged in the use process, an operator can directly replace the second main body part 4 without replacing the whole nut dismounting tool, and the maintenance cost is reduced.

As an embodiment, the number of the screw holes 421 may be plural, and the plural screw holes 421 may be provided at intervals along the circumferential direction of the second mounting plate 42.

According to a third aspect of the present disclosure, there is provided a screw and nut assembly and disassembly tool assembly for assembling and disassembling a compression nut 8 of a conductive screw 7 and a conductive screw seal 9 of a turbine generator rotor, comprising a screw assembly and disassembly tool as described above and a nut assembly and disassembly tool as described above.

Referring to fig. 1 to 4, when the conductive screw 7 and the compression nut 8 are both required to be overhauled, an operator can first take down the compression nut 8 mounted on the conductive screw 7 using a nut removing tool, and then take out the conductive screw 7 using a screw removing tool, thereby overhauling the conductive screw 7 and the compression nut 8; after the overhaul of the conductive screw 7 and the compression nut 8 is finished, an operator can firstly use a screw dismounting tool to mount the conductive screw 7 on the rotor and then use the nut dismounting tool to mount the compression nut 8, so that the overhaul of the conductive screw 7 and the compression nut 8 is realized under the condition that the turbine generator does not draw the rotor.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A screw assembly and disassembly tool for assembling and disassembling conductive screws of a steam turbine generator rotor, comprising:

a first body portion, a first end of which can pass through a vent hole on a turbine generator windshield to be close to the conductive screw, and a second end of which can be located outside the turbine generator windshield;

the clamping part is arranged at the first end of the first main body part and is configured to be clamped with a groove on the head part of the conductive screw;

and a first wrench engagement portion provided at the second end of the first body portion and configured to be engageable with a torque wrench.

2. The screw assembling and disassembling tool according to claim 1, wherein the engaging portion is a claw protruding from a first end of the first main body portion, the claw including a plurality of claw portions, the plurality of claw portions being disposed at intervals in a circumferential direction of the first main body portion, each of the claw portions extending in a radial direction of the first main body portion;

the first spanner matching part and the first main body part are integrally formed, the clamping part is welded at the first end of the first main body part, and the section of the first spanner matching part is formed into a hexagon.

3. The screw assembling and disassembling tool according to claim 1 or 2, wherein a sum of a length of the first main body portion and a length of the first spanner mating portion is equal to or greater than 361mm.

4. The screw assembling and disassembling tool according to claim 1 or 2, wherein the engaging portion is made of 42CrMo steel material, and the first main body portion and the first wrench engaging portion are made of 42Cr steel material.

5. A nut assembly and disassembly tool for assembling and disassembling a compression nut of a conductive screw sealing ring of a steam turbine generator rotor, which is characterized by comprising:

the first end of the second main body part can penetrate through the ventilation hole on the turbine generator wind shield to be close to the compression nut, and the second end of the second main body part can be positioned outside the turbine generator wind shield;

the locating pin is arranged at the first end of the second main body part and is used for being inserted into the through hole on the compression nut;

and a second wrench engagement portion provided at a second end of the second body portion and configured to be engageable with a torque wrench.

6. The nut remover as defined in claim 5, wherein a plurality of said locating pins are provided, and a plurality of said locating pins are provided at intervals along the circumferential direction of said second body portion.

7. The nut removing tool as defined in claim 5, wherein said second body portion includes first and second oppositely disposed mounting plates, a connecting plate connected between said first and second mounting plates, said second wrench mating portion being disposed on a side of said second mounting plate facing away from said connecting plate;

the positioning pins are arranged on one side, deviating from the connecting plate, of the first mounting plate, an avoidance notch is formed in the first mounting plate and used for avoiding a conductive screw of a rotor of the steam turbine generator.

8. The nut removing tool as defined in claim 7, being characterized in that the second wrench engaging portion includes a mounting seat and a wrench engaging portion body, the wrench engaging portion body being mounted on the mounting seat, a cross section of the wrench engaging portion body being formed in a hexagonal shape, a mounting hole being formed in the mounting seat, a screw hole being formed in the second mounting plate, and a fastening bolt passing through the mounting hole and being screwed in the screw hole.

9. A nut remover as claimed in any one of claims 5 to 8, wherein the sum of the length of the second body portion and the length of the second key mating portion is equal to or greater than 169mm.

10. A screw and nut assembly and disassembly tool assembly for assembling and disassembling a compression nut of a conductive screw and conductive screw seal ring of a steam turbine generator rotor, comprising the screw assembly and disassembly tool of any one of claims 1-4 and the nut assembly and disassembly tool of any one of claims 5-9.