CN219711603U - Jigger equipment for nuclear power station - Google Patents

Abstract

The utility model provides jigger equipment for a nuclear power station, which comprises a jigger, a frame and a driving device. Wherein the frame is arranged on at least one side of the rotor to be driven; the jigging device comprises a mounting support arranged on the frame and at least one friction wheel arranged in the mounting support; and the driving device is connected with the friction wheel to drive the friction wheel to rotate so as to drive the rotor to rotate. According to the utility model, the frame is arranged on at least one side of the rotor to be driven, the friction wheel on the frame is contacted with the outer edge surface of the rotor, the driving device drives the friction wheel to move, the rotor is driven by the friction wheel and the friction force on the surface of the rotor, the structure is simple, the operation is convenient, and other mechanical transmission devices are not required to be additionally arranged on the rotor shaft system.

Description

Jigger equipment for nuclear power station

Technical Field

The utility model relates to the field of maintenance of turbo generators, in particular to jigger equipment for a nuclear power station.

Background

The large-scale turbo generator rotor shafting is usually designed with electric jiggers, hydraulic jiggers, auxiliary hydraulic jiggers or manual jiggers, but in the shutdown maintenance process of the unit, the power supply is isolated, so that the power jiggers cannot be put into operation, in addition, some units are not designed with manual jiggers, or the gear disc of the manual jiggers is dismantled after the backrest wheel is disassembled, or the rotor provided with the gear disc is lifted away, and the reasons can all lead to the incapacity of power disc movement or manual disc movement of a single rotor or the whole rotor shafting of the turbo generator.

The main purpose of the disc-driven rotor is that the back wheels are centered between the rotors, the bolts of the back wheels are connected, the concentricity of the back wheels is found after the connection, cylinder collision operation is carried out by other large-scale reaction steam turbines, and the like.

When the SIEMENS half-speed machine type executes cylinder collision to check dynamic and static gaps, the rotor is usually moved by manual operation, at the moment, the rotor is braked when the cylinder contacts the rotor by slowly moving the turbine cylinder body, firstly in the horizontal direction and then in the vertical direction, the force is suddenly increased by personnel manually moving the rotor by the disc, the rotor is stopped by the disc, and the gap value between the rotor and the cylinder in the moving direction is obtained by recording the displacement of the cylinder. The operation is completely dependent on the feeling of operators, the intelligent and high-precision control cannot be realized, the safety and the inaccuracy are not realized, and more manpower is consumed.

For an ALSTOM half-speed type nuclear power large-sized steam turbine generator unit, a manual jigger device is not arranged, so that a rotor jiggling means is not arranged, a master control room is required to be contacted by a telephone every time, a master control person starts to operate a hydraulic jigger device to assist in finishing jigger tasks, the efficiency is extremely low, and when a steam turbine generator is used as a major repair critical path, a great amount of time is occupied by the jigger rotor jigger mode. For GEC full-speed type units and SIEMENS half-speed type units, if the shafting needs to be coiled, the shafting is usually coiled by a crow bar at a manual jigger device. In all kinds, on one hand, the jigger operation is very inconvenient to carry out in the overhaul process, the efficiency is low, and on the other hand, a lot of manpower is consumed, and meanwhile, the jigger operation is not very safe.

The thermal power industry is also correspondingly researched and developed aiming at the jiggering in the overhaul process, mechanical transmission mechanisms such as gears, ratchets and the like which are arranged on a unit rotor shaft system are generally utilized, and corresponding driving and transmission devices are matched, so that on one hand, the size of a steam turbine generator unit is small, the weight is light, the steam turbine generator unit is not suitable for a nuclear power unit, and on the other hand, as with a large-scale nuclear power unit, the mechanical transmission mechanisms are removed during overhaul.

Disclosure of Invention

The utility model aims to at least solve the defects in the prior art to a certain extent and provides improved jigger equipment for a nuclear power station.

In order to solve the above technical problems, an embodiment of the present utility model provides a jigger device for a nuclear power station, including:

a frame for being arranged on at least one side of the rotor to be driven;

the jigging device comprises a mounting support arranged on the frame and at least one friction wheel arranged in the mounting support; and

and the driving device is connected with the friction wheel to drive the friction wheel to rotate so as to drive the rotor to rotate.

In some embodiments, the at least one friction wheel comprises a rolling wheel installed in the installation support and a friction sleeve sleeved on the periphery of the rolling wheel, the rolling wheel is connected with the driving device, and the friction sleeve is used for being abutted with the rotor.

In some embodiments, the rolling wheel is made of a metal material, and the friction sleeve is made of a rubber or silica gel material.

In some embodiments, the device further comprises a transmission device, wherein the transmission device comprises a transmission shaft connected with the driving device and a transmission gear coaxially arranged on the transmission shaft; the at least one friction wheel further comprises a driven wheel meshed with the transmission gear, and the driven wheel is coaxially arranged on the rolling wheel.

In some embodiments, the at least one friction wheel comprises at least two friction wheels which are parallel to the axial direction of the rotor and are arranged at intervals, the transmission shaft is arranged at one side of the friction wheels, the transmission shaft is parallel to the friction wheels and are arranged at intervals, the transmission gear is meshed with at least two driven wheels corresponding to the friction wheels and synchronously linked, and the driven wheels are arranged between the two rolling wheels.

In some embodiments, the at least one friction wheel comprises at least two friction wheels arranged at intervals along the circumferential direction of the rotor, the transmission shaft is arranged between the two friction wheels, the transmission gear is meshed with the driven wheels corresponding to the at least two friction wheels and synchronously linked, and each driven wheel is arranged on the same side of the corresponding rolling wheel in the axial direction.

In some embodiments, the device further comprises a force application device, wherein the force application device is mounted on the frame and connected with the mounting support, and is used for driving the mounting support to move along the radial direction of the friction wheel so that the jigging device radially presses the rotor.

In some embodiments, the force applying device includes a force applying assembly mounted on the frame, the force applying assembly further coupled to the mounting bracket, and a pressure sensor mounted on the force applying assembly for detecting a force between the force applying assembly and the rotor.

In some embodiments, the force application assembly comprises a connecting rod mounted on the frame, a force application member connected with the connecting rod, an adapter connected with one end of the connecting rod far away from the force application member, and a connection support connected with the adapter, wherein the connection support is connected with the mounting support, and the pressure sensor is mounted at the connection part of the connecting rod and the force application member.

In some embodiments, the device further comprises a PLC controller and an emergency brake button, wherein the PLC controller is electrically connected with the emergency brake button, the driving device and the force application device.

Compared with the related art, the embodiment of the utility model has the beneficial effects that: the frame is arranged on at least one side of the rotor to be coiled, the friction wheel on the frame is in contact with the outer edge surface of the rotor, the driving device drives the friction wheel to move, the rotor is coiled by utilizing friction force of the friction wheel and the surface of the rotor, the structure is simple, the operation is convenient, and other mechanical transmission devices are not required to be additionally arranged on a rotor shaft system.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a use state diagram of a jigger device for a nuclear power station according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a jigger device for a nuclear power station according to an embodiment of the present utility model;

FIG. 3 is an enlarged partial view of portion A of FIG. 2 in accordance with the present utility model;

FIG. 4 is a schematic structural diagram of a jiggle device and a force applying device according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a friction wheel according to an embodiment of the present utility model.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.

The embodiment of the utility model provides jigger equipment for a nuclear power station, which is suitable for overhauling a steam turbine generator and is mainly used for a shafting with a single steam turbine rotor or a plurality of rotors connected together in the overhauling process of the large steam turbine generator. It will be appreciated that the jigger device for nuclear power plants may also be applied to small turbo-generator sets.

Referring to fig. 1 and 4, the turning equipment for a nuclear power station includes: a jigger 1, a frame 2 and a driving device. Wherein the frame 2 is arranged on at least one side of a rotor a to be driven, and the driving device 1 comprises a mounting support 11 arranged on the frame 2 and at least one friction wheel 12 arranged in the mounting support 11; the driving device is connected with the friction wheel 12 to drive the friction wheel 12 to rotate, and further drive the rotor a to rotate.

In this embodiment, the frame 2 is disposed on at least one side of the rotor a to be driven, the friction wheel 12 on the frame 2 contacts with the outer edge surface of the rotor a, the driving device drives the friction wheel 12 to move, the rotor is driven by the friction force of the friction wheel 12 and the surface of the rotor a, the structure is simple, the operation is convenient, and no other mechanical transmission device 4 is required to be additionally installed on the rotor shaft system.

It will be appreciated that the rotor a in this embodiment may be a turbine generator rotor back wheel, although in other embodiments, the rotor a may be another type of rotor, and is not particularly limited herein.

In some embodiments, the jigger device for nuclear power plant further comprises a force application device 3, wherein the force application device 3 is mounted on the frame 2 and connected with the mounting support 11, and is used for driving the mounting support 11 to move along the radial direction of the friction wheel 12 so as to enable the jigger device 1 to radially compress the rotor a.

In this embodiment, the force application device 3 applies pressure to the mounting support 11 to drive the friction wheel 12 to move to the outer edge surface of the rotor a and contact with the outer edge surface of the rotor a, and the driving device drives the friction wheel 12 to move, so that the rotor a is driven by the friction force of the friction wheel 12 and the surface of the rotor a, and the structure is simple and the operation is convenient.

It can be understood that the radial direction of the friction wheel 12 in this embodiment is perpendicular to the outer edge surface of the rotor a, that is, the force application device 2 applies pressure to the mounting support 11 to drive the mounting support 11 to move up and down, so as to drive the friction wheel 12 to move to the outer edge surface of the rotor a.

The frame 2 in some embodiments is a straddle type frame steel structure, the frame 2 straddles the rotor a, is mounted on the bearing box center plane b, and is fastened and fixed on the bearing box by using the center plane b bolt holes. The force application device 3 is arranged on the frame 2 and penetrates through the frame 2 to be connected with the mounting support 11, the mounting support 11 is positioned above the rotor a, and the force application device 3 applies pressure to the mounting support 11 to drive the friction wheel 12 to move to the outer edge surface of the rotor a and contact with the rotor a. In the practical application process, the frame 2 is provided with a hanging point, so that the on-site installation, the disassembly and the hanging work are greatly facilitated.

It can be appreciated that the riding frame steel structure can adopt a doorframe type rectangular structure or a semicircular arc structure. The specific shape is not particularly limited, and the riding frame steel structure is mainly used to be firmly fixed to the bearing housing center plane b, and the frame 2 may be used as a support frame for the friction wheel 12 and other structures, as long as the structure satisfies the above requirements.

Referring to fig. 5 together, in some embodiments, the at least one friction wheel 12 includes a rolling wheel 121 installed in the mounting support 11 and a friction sleeve 122 sleeved on a circumferential side of the rolling wheel 121, the rolling wheel 121 is connected to the driving device, and the friction sleeve 122 is used to abut against the rotor a.

In this embodiment, at least one friction wheel 12 is exemplified by a single friction wheel 12, and the mounting support 11 includes two opposite mounting plates 111 and a top plate 112 connecting the two mounting plates 111, so as to define a mounting space, in which the friction wheel 12 is mounted, and two ends of the friction wheel are respectively connected with the two mounting plates 111. Specifically, two ends of the rolling wheel 121 are respectively connected with two mounting plates 111, and can rotate in the mounting space by taking two ends as rotating shafts, the rolling wheel 121 in this embodiment can be connected with a driving device, the rolling wheel 121 is directly driven to roll by the driving device, the friction sleeve 122 is used to contact with the outer edge surface of the rotor a, and the rotor is driven by the surface friction force.

It will be appreciated that the friction sleeve 122 is at least partially exposed from the mounting plate 111 to avoid collision friction between the mounting plate 111 and the outer peripheral surface of the rotor a, thereby preventing damage to the outer peripheral surface of the rotor a.

It should be noted that, in this embodiment, the rolling wheel 121 is made of a metal material, the friction sleeve 122 is made of a polymer material, that is, the friction wheel 12 is a structure with a polymer material lined on an outer circle of a metal structure, so as to ensure a high enough friction coefficient, and meanwhile, when an emergency occurs, such as a rotor a and a cylinder are subjected to a dynamic and static impact abrasion, the friction wheel 12 can slip on the surface of the rotor a due to sudden torque increase when personnel do not intervene in time or a torque sensor fails, so as to ensure that equipment damage is not caused. Preferably, the polymeric material comprises one of rubber or silicone to ensure that the friction wheel 12 slips on the surface of the rotor a when the rotor a is braked, ensuring that no equipment damage is caused. In this embodiment, the rolling wheel 121 may be made of steel, copper, or the like. Of course, in some embodiments, other types of metal materials may be used for the rolling wheel 121, and other types of polymer materials may be used for the friction sleeve 122, which is not limited herein.

Referring to fig. 3-5 together, in the practical application process, the jigger device for the nuclear power station further comprises a transmission device 4, wherein the transmission device 4 comprises a transmission shaft 41 connected with the driving device and a transmission gear 42 coaxially arranged on the transmission shaft 41; at least one friction wheel 12 further comprises a driven wheel 123 meshed with the transmission gear 42, and the driven wheel 123 is coaxially arranged on the rolling wheel 121.

It will be appreciated that the friction wheel 12 may be directly connected to the drive means. Preferably, the friction wheel 12 is connected to the drive via the transmission 4. That is, a transmission device 4 is arranged between the friction wheel 12 and the driving device, and the driving device drives the transmission device 4 to rotate so as to drive the friction wheel 12 to rotate. The transmission shaft 41 of the transmission device 4 penetrates through the two mounting plates 111, one end of the transmission shaft 41 is connected with the driving device, the transmission gear 42 arranged on the transmission shaft 41 is meshed with the driven wheel 123 on the friction wheel 12, when the transmission shaft 41 is driven to rotate, the friction wheel 12 is driven to roll, the friction sleeve 122 is contacted with the outer edge surface of the rotor a, and the rotor a is driven by the friction force of the surface. Likewise, the rotating shaft of the rolling wheel 121 may be meshed with a gear and then reduced in speed to be transmitted to the transmission shaft 41.

In different application scenarios, the transmission gear 42 may adopt gear transmission with different modes and different modes, and the mode is not limited herein.

In some embodiments, the at least one friction wheel 12 includes at least two friction wheels 12 disposed in parallel and spaced along the axial direction of the rotor a, the transmission shaft 41 is disposed on one side of the friction wheel 12, the transmission shaft 41 is disposed in parallel and spaced with the friction wheels 12, the transmission gear 42 is meshed with the driven wheels 123 corresponding to the at least two friction wheels 12, and the driven wheels 123 are disposed between the two rolling wheels 121 in synchronous linkage.

In the practical application process, the number of friction wheels 12 is preferably 2, and the transmission shaft 41 is provided with transmission gears 42 matched with the number of driven wheels 123 to realize synchronous linkage. It can be appreciated that the friction wheels 12 in this embodiment are disposed in parallel and spaced along the axial direction of the rotor a, and the transmission shaft 41 is disposed on one side of the friction wheels 12, so as to facilitate the friction wheels 12 to roll. Of course, in other embodiments, the number of friction wheels 12 may be 3, 4 or more, and may be adjusted as desired.

It will also be appreciated that to better achieve synchronous linkage, multiple friction wheels 12 may be connected in series by a single rotating shaft and share a common drive shaft 41; when the number of friction wheels 12 is greater than 2, driven wheels 123 are provided between two adjacent friction wheels 12 to ensure synchronous transmission, and at this time, a corresponding number of transmission gears 42 are provided on the transmission shaft 41 to mesh with the corresponding driven wheels 123.

In some embodiments, the at least one friction wheel 12 includes at least two friction wheels 12 disposed at intervals along the circumferential direction of the rotor a, the transmission shaft 41 is disposed between the two friction wheels 12, the transmission gear 42 is meshed with corresponding driven wheels 123 of the at least two friction wheels 12, and synchronously linked, and each driven wheel 123 is disposed on the same side of the corresponding rolling wheel 12 in the axial direction.

In the practical application process, the friction wheels 12 are preferably 2 friction wheels 12 in pairs, and the two friction wheels 12 are arranged in parallel along the axial direction of the rotor a at intervals, and the two driven wheels 123 are simultaneously driven by one transmission gear 42 to realize synchronous linkage of the two friction wheels, wherein the driven wheels 123 are preferably arranged in the middle of the rolling wheel 121, and the rolling wheel 121 is sleeved with two friction sleeves 122 which are respectively positioned at two sides of the driven wheels 123.

It should be noted that, because the friction wheels 12 are connected by pin shafts, a certain degree of freedom can be automatically aligned according to the outer arc surface of the rotor a, so as to ensure that all the friction wheels 12 are tightly attached to the outer surface of the rotor a.

It will be appreciated that the friction wheel 12 may be single, paired, or multiple in pairs in different application scenarios. It will also be appreciated that when the number of friction wheels 12 exceeds two, a corresponding number of transmissions 4 may be provided depending on the actual number of friction wheels 12, such as 3 friction wheels 12, two transmissions 4 may be provided, and 3 transmissions 4 may be provided when 4 friction wheels 12 are provided. Of course, when the friction wheels 12 are 4, 2 transmission devices 4 may be provided, that is, one transmission device 4 may be shared by two pairs, and the matching manner is not particularly limited, so long as the synchronous linkage between the friction wheels 12 is satisfied and the rotor can be driven.

In some embodiments, the device further comprises a PLC controller and an emergency brake button, wherein the PLC controller is electrically connected with the emergency brake button, the driving device and the force application device 3.

In the embodiment, the PLC controller realizes control and monitoring of the whole equipment, can display various parameters, can control the speed of the rotating speed of the equipment, monitors the torque of the equipment, and is provided with an emergency braking shutdown button for braking the shutdown equipment in emergency. Preferably, the PLC controller adopts a PLC acquisition operation data controller.

Referring to fig. 2 together, in some embodiments, the force applying device 3 includes a force applying assembly 31 mounted on the frame 2, and a pressure sensor 32 mounted on the force applying assembly 31, the force applying assembly 31 further being connected to the mounting support 11, the pressure sensor 32 being configured to detect a force between the force applying assembly 31 and the rotor a.

In this embodiment, after the frame 2 is fixed, the force application component 31 applies pressure to the friction wheel 12 to generate a certain pressure to the surface of the rotor a, and the friction coefficient between rubber and metal is a constant value, so that the friction force between the friction wheel 12 and the surface of the rotor a is increased, and the friction force is reduced. Meanwhile, the force application device 3 is provided with a friction wheel 12 pressure sensor 32, and a maximum pressure limit value is provided, wherein the maximum pressure is not more than 80% of the load of the friction wheel 12 so as not to crush the friction wheel 12.

It can be appreciated that under different application scenarios, the pressure sensor 32 can set different pressures according to different rotor and shafting disc requirements and friction coefficients, and meanwhile, a maximum pressure limit value is set, and the maximum pressure is not more than 80% of the load of the friction wheel 12 so as not to crush the friction wheel 12.

It should be noted that, the pressure sensor 32 of the present embodiment may be a stress-strain sensor or the like, so that the pressure data of the friction wheel 12 may be displayed for the operator to observe.

Referring to fig. 3 together, in some embodiments, the force application assembly 31 includes a connecting rod 311 mounted on the frame 2, a force application member connected to the connecting rod 311, an adapter 312 connected to an end of the connecting rod 311 remote from the force application member, and a connection support 313 connected to the adapter 312, the connection support 313 is connected to the mounting support 11, and the pressure sensor 32 is mounted at a connection point between the connecting rod 311 and the force application member.

In this embodiment, the connecting rod 311 passes through the frame 2, one end is connected with the force application member, the other end is connected with the adapter 312, the adapter 312 is mounted on the connection support 313, and the connection support 313 is connected with the mounting support 11, so as to form the force application assembly 31.

It will be appreciated that the force application member may take a variety of forms, such as a hand wheel, handle, and apply pressure to the connecting rod 311 via a lever, screw or worm gear drive, thereby transmitting force to the mounting support 11, ultimately enabling the friction wheel 12 to be in close engagement with the rotor a. In addition, the force application member may also use an operating lever or a hand wheel to apply pressure to the friction wheel 12 through a spring or a screw thread, so as to generate a certain pressure to the surface of the rotor a. The present utility model is not particularly limited herein.

It will be further appreciated that the adapter 312 is provided in this embodiment to convert the force applied by the force application member into a force that drives the mounting support 11 to move up and down, so as to avoid the mounting support 11 from moving left and right or being shifted back and forth due to the applied force, thereby ensuring that all the friction wheels 12 are tightly attached to the outer surface of the rotor a.

In some embodiments, the drive means comprises a reduction gearbox connected to the drive shaft 41, a drive motor connected to the reduction gearbox, and a torque sensor arranged between the reduction gearbox and the drive shaft 41.

In the present embodiment, the driving motor is exemplified by a servo motor. In the embodiment, the servo motor and the reduction gearbox are assembled into a whole, and are connected with the output end of the transmission shaft 41 through the coupler, so that the output rotating speed of the servo motor can be adjusted, and the requirements of different working conditions on the rotating speed of the turbine rotor disk are met. Preferably, in some embodiments, the friction wheel 12 is driven by a servo motor driving gearbox to realize the friction driving of the rotor a, and the rotating speed of the large shaft of the steam turbine can be variable between 0.4 and 2 rev/min. A torque sensor is installed between the reduction gearbox and the output end of the transmission shaft 41, the magnitude of the output torque of the servo motor is sensed at any time, and a signal transmission value PLC control platform (namely a PLC controller) can automatically stop the equipment when the torque reaches a preset value or the torque suddenly increases by 50%. The torque sensor, the reduction gearbox and the servo motor may be of a suitable type according to the need, and are not limited herein.

Specifically, the servo motor in this embodiment is variable in speed, satisfies the disk shaft rotational speed: the rotation speed is set to be 2rev/min in the process of single rotor or shafting disc moving straight shaft, and is set to be 0.4rev/min in the process of needing rotor a centering; in this embodiment, the start torque is 1200Nm and the torque after rotation is 200Nm.

Therefore, the rotating speed can be adjusted, different requirements on rotating speeds of jigger equipment for nuclear power stations under different working conditions are met, the lower rotating speed of 0.4rev/min is used for centering and other working requirements, the higher rotating speed of 2rev/min can realize the completion of straight shaft work in a shorter time, the two can be switched and adjusted at will, and the rotating speed can be set at will in the range.

In this embodiment, the PLC controller collects the driving torque of the friction wheel 12 in real time and calculates and monitors the driving torque, and when the torque reaches a certain prescribed limit (i.e., a preset value) or the torque suddenly increases by 50% or more, the jigger device can be automatically stopped, so that a high-precision control operation such as a cylinder collision operation can be performed, and human factors can be reduced.

During the maintenance and centering of the unit and the measurement of the concentricity of the paired wheels, the unit can be directly controlled by a working responsible person on site, the main control is not required to be repeatedly reset, the rotating speed is low, the central adjustment of a shafting is affected, the communication time is reduced by about 5 hours for one-time overhaul, and the key path is shortened.

The specific working principle is as follows:

during maintenance, when the jigger equipment for the nuclear power station needs to be put into service, the frame 2 is placed and mounted on the bearing box center section b which is opposite to the rotor a, the frame 2 is fastened on the bearing box through bolts, the friction wheel 12 is contacted with the outer surface of the rotor a and is tightly pressed through the force application device 3, the friction wheel 12 is in pin shaft connection, certain freedom degree can be automatically aligned according to the outer arc surface of the rotor a, the friction wheels 12 are ensured to be tightly attached to the outer surface of the rotor a, a power supply is connected, a servo motor is started, and the friction wheel 12 is rotationally driven to rotate through the transmission of the reduction gearbox, the transmission gear 42 and the driven wheel 123. Meanwhile, the real-time monitoring of the disc-drive torque is realized by using the PLC, the disc-drive torque participates in control, and when the torque reaches a preset value or the torque suddenly increases by 50%, the disc-drive torque can be automatically stopped.

It should be noted that, when the thermal failure of unit stops, under the condition that the jigger of former design can't put into use, this jigger equipment for nuclear power station can use as emergent jigger assurance unit safety, avoids causing the permanent bending damage of major axis.

In conclusion, the jigger equipment for the nuclear power station provided by the utility model has the advantages of simple structure and convenience in disassembly and assembly, and can realize quick investment (within 0.5 h) of overhauling jiggers. Compared with the mode that the jigger in the related art mainly depends on manual jiggling, in the overhaul process, the jigger equipment for the nuclear power station can accurately sense moment data, calculate and participate in control according to the change condition of moment, realize automatic control, have good reliability and improve operation safety. On the other hand, the maintenance quality is improved, high-quality continuous constant-speed turning can be ensured, and after the shafting is turned straight, the axle system is started to find the center, the concentricity and the connecting wheel-pair bolts and the like. The maintenance efficiency is improved, the key path time is saved, and the disc shaft time during center adjustment and measurement of the concentricity of the pair wheel can be saved by about 10 hours. Meanwhile, manpower can be liberated, the turning quality can be obviously improved for centering, straight shaft and other operations, and the problems of uneven speed, negligence, intermittent manual slackening and insufficient turning time in the human execution process are solved by not only centering the straight shaft turning for 4 hours generally.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A jigger apparatus for a nuclear power station, characterized by comprising:

a frame for being arranged on at least one side of the rotor to be driven;

the jigging device comprises a mounting support arranged on the frame and at least one friction wheel arranged in the mounting support; and

and the driving device is connected with the friction wheel to drive the friction wheel to rotate so as to drive the rotor to rotate.

2. The jigger apparatus for nuclear power plant as claimed in claim 1, wherein the at least one friction wheel comprises a rolling wheel mounted in the mounting bracket and a friction sleeve fitted around a peripheral side of the rolling wheel, the rolling wheel being connected to the driving device, the friction sleeve being adapted to abut against the rotor.

3. The jigger device for nuclear power plants as claimed in claim 2, characterized in that the rolling wheel is made of metal material and the friction sleeve is made of rubber or silica gel material.

4. The jigger apparatus for nuclear power plant as claimed in claim 2, further comprising a transmission device including a transmission shaft connected to the driving device and a transmission gear coaxially provided on the transmission shaft; the at least one friction wheel further comprises a driven wheel meshed with the transmission gear, and the driven wheel is coaxially arranged on the rolling wheel.

5. The jigger device for nuclear power plant as claimed in claim 4, characterized in that the at least one friction wheel comprises at least two friction wheels arranged in parallel and at intervals along the axial direction of the rotor, the transmission shaft is arranged on one side of the friction wheels, the transmission shaft is arranged in parallel and at intervals with the friction wheels, the transmission gear is meshed with the driven wheels corresponding to the at least two friction wheels and synchronously linked, and the driven wheels are arranged between the two rolling wheels.

6. The jigger apparatus for nuclear power plant as claimed in claim 4, characterized in that the at least one friction wheel comprises at least two friction wheels arranged at intervals along the circumferential direction of the rotor, the transmission shaft is arranged between the two friction wheels, the transmission gear is meshed with the driven wheels corresponding to the at least two friction wheels and synchronously linked, and each driven wheel is arranged on the same side of the corresponding rolling wheel in the axial direction.

7. A jigger device for nuclear power plant as claimed in any one of claims 1 to 6, further comprising a force application device mounted to the frame and connected to the mounting bracket for driving the mounting bracket to move in a radial direction of the friction wheel to radially compress the jigger against the rotor.

8. The nuclear power plant jigger apparatus of claim 7, wherein the force application means comprises a force application assembly mounted to the frame and a pressure sensor mounted to the force application assembly, the force application assembly further being connected to the mounting bracket, the pressure sensor being adapted to detect a force between the force application assembly and the rotor.

9. The jigger device for nuclear power plant as claimed in claim 8, characterized in that the force application assembly comprises a connecting rod mounted on a frame, a force application member connected with the connecting rod, an adapter connected with one end of the connecting rod far away from the force application member, and a connection support connected with the adapter, the connection support is connected with the mounting support, and the pressure sensor is mounted at the connection position of the connecting rod and the force application member.

10. The jigger device for nuclear power plant as claimed in claim 7, further comprising a PLC controller and an emergency brake button, wherein the PLC controller is electrically connected to the emergency brake button, the driving means, and the force application means.