CN113607071A

CN113607071A - Generator rotor hoisting air gap monitoring and protecting device

Info

Publication number: CN113607071A
Application number: CN202110903429.1A
Authority: CN
Inventors: 赵宇周; 姚仁海; 陈永雷; 厉超; 程波
Original assignee: Three Gorges High Technology Information Technology Co ltd
Current assignee: Three Gorges High Technology Information Technology Co ltd; China Three Gorges Construction Engineering Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2021-11-05
Anticipated expiration: 2041-08-06
Also published as: CN113607071B

Abstract

The invention discloses a generator rotor hoisting air gap monitoring and protecting device, which comprises: a guard for collision sense feedback of the rotor; the monitoring communication module is used for receiving and processing feedback information of the protective device and sending an instruction to the report warning module; the report warning module is used for receiving the instruction of the monitoring communication module and giving an alarm; the distance measuring module is used for measuring the distance between the rotor and the bottom of the machine pit; the feedback display module receives and processes the feedback information and displays the hoisting process and the hoisting state of the rotor through 3D graphic simulation; the power supply guarantee module is used for providing a power supply. Protection and monitoring have been realized to protector in the limited clearance of rotor and stator, through each module cooperation, the user reduces by a wide margin, and equipment protection is simple and safe effective, and hoist and mount monitoring covers the hidden danger of not staying entirely, and equipment is crowded to bump the warning in time, and normal position operation is visual directly perceived, and the synchronous show of hoist and mount process hangs a walking bottom and can keep watch on, ensures personnel and equipment safety, makes hoist and mount simple, swift.

Description

Generator rotor hoisting air gap monitoring and protecting device

Technical Field

The invention relates to the technical field of generator rotor hoisting, in particular to a monitoring and protecting device for a generator rotor hoisting air gap.

Background

At present, a generator rotor is hoisted in the installation and maintenance of a vertical hydropower station unit mainly by adopting a steel wire rope for balanced hoisting, the weight of the generator rotor in Yangtze river (including world maximum) is between dozens of tons and 2300 tons, the air gap between the generator rotor and a stator is only 42mm at most, and the hoisting difficulty is high. In order to ensure the safety of the hoisting process and not to damage the rotor and the stator, the protection measure adopted currently is hoisting operation in a way that a circumferential manual continuous inserting plate is matched with a whistle commanding and alarming mode. The hoisting operation mode is labor-consuming, time-consuming, low in working efficiency and high in safety risk, and is a big problem which continuously puzzles water and electricity workers.

Therefore, in order to ensure the safety of personnel and equipment and ensure that the hoisting process is simple and rapid, a generator rotor hoisting air gap monitoring and protecting device is needed to be provided so as to at least partially solve the problems in the prior art.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to at least partially solve the above problems, the present invention provides a generator rotor hoisting air gap monitoring and protecting device, comprising: a protection device, a monitoring communication module, a report warning module, a distance measuring module, a feedback display module and a power supply guarantee module,

the protective device is arranged on the magnetic pole on the side surface of the rotor and used for collision perception feedback of the rotor;

the monitoring communication module is used for receiving and processing feedback information of the protective device and sending an instruction to the report warning module;

the report warning module is used for receiving the instruction of the monitoring communication module and giving an alarm;

the distance measuring module is used for measuring the distance between the rotor and the bottom of the machine pit;

the feedback display module receives and processes information fed back by the monitoring communication module, the report warning module and the distance measuring module, and displays the hoisting process and the hoisting state of the rotor through 3D graphic simulation;

and the power supply guarantee module is used for providing power for the protection device, the monitoring communication module, the report warning module and the ranging module.

Preferably, the guard comprises: protection strip, film pressure sensor and electro-magnet, the inside of protection strip evenly is equipped with a plurality of film pressure sensor along its length direction, the back of protection strip evenly is equipped with a plurality of electro-magnets, the inside of protection strip just is located film pressure sensor's both sides are equipped with the trough, the surface of electro-magnet with the surface parallel and level of protection strip.

Preferably, the monitoring communication module includes: the device comprises a multiplexer, a linear voltage converter and a controller, wherein the multiplexer is electrically connected with a plurality of film pressure sensors respectively, the linear voltage converter is electrically connected with the multiplexer and the controller respectively, and the controller is electrically connected with a report warning module;

the controller includes single chip microcomputer control unit and wireless network deployment transmission unit, report warning module includes relay and audible-visual annunciator, single chip microcomputer control unit is connected with multiplexer, linear voltage converter, wireless network deployment transmission unit and relay electricity respectively, relay and audible-visual annunciator electricity are connected.

Preferably, the single chip microcomputer control unit is configured to scan all the film pressure sensors in the protection device when the monitoring communication module is initialized, determine whether a fault sensor exists, feed back fault information to the control terminal of the feedback display module if the fault sensor exists, and enable the protection device to operate normally if the fault sensor does not exist; when the protection device normally works, the single chip microcomputer control unit circularly monitors all the film pressure sensors through the multiplexer, if one film pressure sensor is abnormal in feedback, the single chip microcomputer control unit continuously monitors the film pressure sensor within a preset time threshold, if the film pressure sensor is abnormal in continuous feedback within the time threshold, the lifting position of the rotor is judged to be deviated, and if the film pressure sensor is abnormal in feedback interruption within the time threshold, the condition of mistaken touch is judged.

Preferably, the distance measuring module is disposed in a groove between two adjacent magnetic poles of the rotor.

Preferably, the feedback presentation module includes: the wireless receiver is in communication connection with the control terminal through a USB interface arranged on the wireless receiver, the wireless receiver is used for receiving information fed back by the monitoring communication module, the report warning module and the ranging module and transmitting the information to the control terminal, and the control terminal processes the fed-back information data and displays the hoisting process and the hoisting state of the rotor through 3D graphic simulation.

Preferably, the power supply guarantee module is a rechargeable power supply.

Preferably, the electromagnet is of a thin sheet type, and the material of the protective strip is TPV rubber.

Preferably, the positioning device further comprises a positioning module, wherein the positioning module comprises: a measuring unit, a correcting unit, a calculating unit and an adjusting unit,

the measuring unit is used for measuring a plurality of measuring point data of the peripheral surface of the rotor during hoisting in real time on the same plane from a plurality of different directions, the measuring unit comprises a plurality of laser ranging devices, the laser ranging devices are uniformly distributed along the circumferential direction of the machine pit and are higher than the top of the machine pit, the number of the laser ranging devices is even and are arranged in pairs in an opposite mode, light beams emitted by the laser ranging devices vertically penetrate through the central axis of the stator, the distance between each laser ranging device and the central axis of the stator is equal, and the measuring point data is obtained by measuring the distance between the measuring point data and the peripheral surface of the rotor during hoisting through the laser ranging devices;

the correcting unit is used for processing a plurality of measuring point data of the measuring unit by adopting a system error correcting method, selecting abnormal data in the plurality of measuring point data, correcting the selected abnormal data to obtain corrected measuring point data, drawing a rotor section curve during hoisting at a certain moment according to the corrected plurality of measuring point data,

wherein, the drawing of the rotor section curve when hoisting at a certain moment comprises: taking the plane of the measuring unit as a reference plane, taking the intersection point of the central axis of the stator and the reference plane as an origin, establishing a rectangular coordinate system in the reference plane, calibrating the coordinates of each laser ranging device and the coordinates of the corrected measuring points in the rectangular coordinate system, and drawing a cross-sectional curve of the rotor on the reference plane according to the coordinates of the measuring points in the reference plane;

the calculation unit includes: a judgment subunit, a first calculation subunit and a second calculation subunit,

the judging subunit is used for judging the shape of the rotor section curve generated by the correcting unit, and the shape of the section curve comprises an ellipse and a circle;

the first calculating subunit is used for calculating a first adjusting parameter of the rotor when the cross-sectional curve is elliptical, and adjusting the elliptical cross-sectional curve to be a circular cross-sectional curve through the adjusting unit according to the first adjusting parameter;

the second calculating subunit is used for calculating a second adjusting parameter of the rotor when the section curve is circular;

the first adjustment parameters comprise the deflection direction and the deflection angle of the rotor, when the cross-sectional curve is elliptical, the rotor hoisted at a certain moment is considered to be inclined, the deflection angle of the rotor can be calculated through the major axis radius of the elliptical cross-sectional curve and the radius of the rotor, the deflection direction of the rotor can be obtained through major axis coordinate information of the elliptical cross-sectional curve, and the hoisting deflection of the rotor is adjusted by controlling the hoisting machine through the adjustment unit according to the deflection angle and the deflection direction;

the second adjustment parameter comprises offset distances of the rotor in the x axis and the y axis, when the cross-sectional curve is circular, the rotor hoisted at a certain moment is not considered to be inclined, the center point coordinate of the circular cross-sectional curve is obtained through calculation, the center point coordinate of the reference cross-sectional curve of the rotor in the reference plane is an original point, and the translation distances of the crane in the x axis and the y axis can be adjusted through the adjustment unit according to the center point coordinate information, so that the circular cross-sectional curve is overlapped with the reference cross-sectional curve;

and the adjusting unit adjusts and positions the position of the rotor through a crane for hoisting the rotor according to the calculation result of the calculating unit.

Preferably, film pressure sensor's weld column and wire welded weld part cover are equipped with protection machanism, protection machanism includes: the wire connector comprises two movable sleeves, two slide rods and two protection plates, wherein the two movable sleeves are symmetrically arranged, a first round hole is formed in the center of each movable sleeve, two sides of the first round hole are symmetrically provided with a second round hole, the slide rods are inserted in the second round holes in a sliding manner, a first spring is connected between the end parts of the slide rods and the bottoms of the second round holes, a telescopic rod is arranged in the middle of each slide rod, the other end of each telescopic rod is connected with the middle part of one side of each protection plate, each protection plate is semi-arc-shaped, the protection plates are inserted in the first round holes in a sliding manner, the two protection plates are connected through a clamping device, a welding part is fixed between the two protection plates, and a wire can pass through the first round hole;

the clamping device comprises: joint post, one side of guard plate is equipped with the joint post, another one side of guard plate be equipped with the third round hole that the joint post corresponds, the bilateral symmetry of joint post is equipped with the recess, the recess internal rotation is connected with the hook-shaped movable block, the hook-shaped movable block with be equipped with the second spring between the recess, one side of third round hole is equipped with the joint hole, the downthehole edge of joint post length direction slides and is equipped with the locking plate, the below of joint post is passed the chucking board, the top surface of chucking board be equipped with the locking groove that the hook-shaped movable block corresponds, the bottom surface of chucking board with be equipped with the third spring between the bottom surface in joint hole.

The invention also provides a protection device for the generator rotor hoisting air gap monitoring system, which comprises a protection strip, film pressure sensors and electromagnets, wherein the plurality of film pressure sensors are uniformly arranged in the protection strip along the length direction of the protection strip, the plurality of electromagnets are uniformly arranged on the back surface of the protection strip, wiring grooves are formed in the protection strip and positioned at two sides of the film pressure sensors, and the surfaces of the electromagnets are flush with the surfaces of the protection strip.

Compared with the prior art, the invention at least comprises the following beneficial effects:

the generator rotor hoisting air gap monitoring and protecting device provided by the invention has the advantages that through the protecting device, the protection is realized in the limited clearance between the rotor and the stator, the monitoring is also considered, through the mutual cooperation of the modules, the intelligent real-time monitoring is realized in the hoisting process of the rotor, the number of users is greatly reduced, the working strength is reduced, the equipment protection is simple, clear, safe and effective, the hoisting monitoring covers the whole piece, no hidden danger is left, the equipment collision alarm is timely, the normal position operation is visual, the hoisting process is synchronously displayed, the walking bottom of the hoisting piece can be monitored, the safety of personnel and equipment is ensured, and the hoisting is simple and rapid.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

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

fig. 1 is a schematic structural diagram of a generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 2 is an exploded structural schematic diagram of a protection device in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 3 is a schematic sectional structure view of a protection device in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 4 is a connection block diagram of a protection device, a monitoring communication module and a report warning module in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 5 is a schematic structural diagram of a distance measuring module in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 6 is a schematic structural diagram of a report warning module in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 7 is a schematic diagram of a multiplexer in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 8 is a circuit diagram of a linear voltage converter in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 9 is a schematic diagram of a control unit of a singlechip in the generator rotor hoisting air gap monitoring system according to the invention.

Fig. 10 is a schematic view of pressure applied to a protective strip during rotor hoisting in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 11 is a schematic view of the installation position of a laser ranging device in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 12 is a schematic diagram illustrating a coordinate calculation principle of a measurement point in the generator rotor hoisting air gap monitoring system according to the present invention.

Fig. 13 is a schematic view of an installation structure of a protection mechanism in the protection device according to the present invention.

Fig. 14 is an exploded view of the shielding mechanism of the shielding device according to the present invention.

Fig. 15 is a schematic partial sectional view of a shielding mechanism of the shielding device according to the present invention.

Fig. 16 is a schematic structural diagram of a guard mechanism in the guard device according to the present invention.

Fig. 17 is a schematic structural diagram of a protection plate in the protection device of the present invention.

Fig. 18 is a schematic cross-sectional view of a latch of the shielding device according to the present invention.

The device comprises a protection device 1, a protection bar 110, a wiring groove 111, a film pressure sensor 120, an electromagnet 130, a monitoring communication module 2, a report warning module 3, a distance measuring module 4, a feedback display module 5, a wireless receiver 510, a control terminal 520, a rotor 6, a laser distance measuring device 7, a protection mechanism 8, a movable sleeve 810, a first round hole 811, a second round hole 812, a sliding rod 820, a protection plate 830, a first spring 840, a telescopic rod 850, a clamping device 860, a clamping column 861, a third round hole 862, a hook-shaped movable block 863, a second spring 864, a clamping hole 865, a locking plate 866, a locking groove 867, a third spring 868 and a lead 9.

Detailed Description

The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1-18, the present invention provides a generator rotor hoisting air gap monitoring system, comprising: a protection device 1, a monitoring communication module 2, a report warning module 3, a distance measuring module 4, a feedback display module 5 and a power supply guarantee module,

the protective device 1 is arranged on a magnetic pole on the side surface of the rotor 6 and used for collision perception feedback of the rotor 6;

the monitoring communication module 2 is used for receiving and processing feedback information of the protection device 1 and sending an instruction to the report warning module 3;

the report warning module 3 is used for receiving the instruction of the monitoring communication module 2 and sending an alarm;

the distance measuring module 4 is used for measuring the distance between the rotor 6 and the bottom of the machine pit;

the feedback display module 5 receives and processes information fed back by the monitoring communication module 2, the report warning module 3 and the ranging module 4, and displays the hoisting process and the state of the rotor 6 through 3D graphic simulation;

and the power supply guarantee module is used for providing power for the protection device 1, the monitoring communication module 2, the report warning module 3 and the ranging module 4.

The working principle of the technical scheme is as follows: before hoisting, the protection device 1 is arranged on a magnetic pole on the side surface of a rotor 6, a monitoring communication module 2 is arranged on the top surface of the rotor 6 and is electrically connected with the protection device 1 through a pluggable connector, a report warning module 3 is electrically connected with the monitoring communication module 2 and is arranged on the top surface of the rotor 6, a ranging module 4 is arranged in a groove between adjacent magnetic poles, a feedback display module 5 is respectively in communication connection with the monitoring communication module 2, the report warning module 3 and the ranging module 4, power supply guarantee modules are respectively arranged on the protection device 1, the monitoring communication module 2, the report warning module 3 and the ranging module 4 and are used for guaranteeing that each device normally works under sufficient point electric quantity, in the hoisting process, if the side surface of the rotor 6 collides with a stator, the protection device 1 can sense the collision and feed back to the monitoring communication module 2, the monitoring communication module 2 can control the report warning module 3 to give an alarm to prompt a worker of the position where the rotor 6 collides, meanwhile, in the hoisting process, the distance between the rotor 6 and the bottom of the machine pit is detected in real time by the distance measuring module 4, the hoisting process of the rotor 6 is monitored, information fed back by each module by the display module 5 is fed back, the hoisting process and the state of the rotor 6 are displayed by utilizing 3D graphic simulation, and therefore a worker can monitor the hoisting of the rotor 6 more visually.

The beneficial effects of the above technical scheme are that: through protector 1, also compromise the monitoring when having realized the protection in rotor 6 and the limited clearance of stator, through the work of mutually supporting of each module, realize intelligent real-time supervision to rotor 6's hoist and mount process, the user reduces and working strength reduces by a wide margin, equipment protection is simple and clear and safe effective, hoist and mount monitoring covers whole, do not keep hidden danger, equipment is crowded to bump the warning in time, normal position operation is directly perceived visual, the synchronous show of hoist and mount process, it can keep watch on to hang a walking bottom, ensure personnel and equipment safety, make hoist and mount simple, swiftly.

In one embodiment, the shielding device 1 comprises: protection strip 110, film pressure sensor 120 and electro-magnet 130, the inside of protection strip 110 evenly is equipped with a plurality of film pressure sensor 120 along its length direction, the back of protection strip 110 evenly is equipped with a plurality of electro-magnets 130, the inside of protection strip 110 just is located film pressure sensor 120's both sides are equipped with trough 111, the surface of electro-magnet 130 with the surface parallel and level of protection strip 110.

The working principle of the technical scheme is as follows: the protective strip 110 is made of elastic materials, the film pressure sensor 120 is embedded in the protective strip 110, a wiring groove 111 of a lead 9 connected with the film pressure sensor 120 is reserved in the protective strip 110, the size of the film pressure sensor 120 is customized according to actual requirements, a sensing area is preliminarily designed and customized according to the size of 30-50 mm, the thickness is 0.2-0.3 mm, the pressure testing range covers 0.1 Kg-100 Kg, the highest precision is 10g, the measuring range only uses a reference value, if the pressure sensing area is not bent and folded, only front extrusion is carried out, the sensor cannot be damaged, any point on the contact surface of the film pressure sensor 120 is subjected to pressure, and the film pressure sensor 120 can have obvious resistance change; for the distribution of the film pressure sensors 120, a sensor is embedded at an interval of 8cm preliminarily, the length can be specifically selected according to different unit models, the film pressure sensors 120 are embedded in the protective strip 110 during manufacturing, lines can be integrated into the protective strip 110, the protective strip 110 manufactured under general conditions is longer than the length required during hoisting, the protective strip can be cut according to the length required in actual use before use, and the rest film pressure sensors 120 can also work normally; ultra-thin electro-magnet 130 is embedded in the upper, middle and lower portion at the back of protection strip 110, the mounted position of protection strip 110 has been adjusted before hoist and mount work begins, open switch circular telegram immediately and just can make rubber protection strip 110 closely laminate in rotor 6 surface, when rotor 6 hoists and extrudes protection strip 110, film pressure sensor 120 detects that the pressure change that rotor 6 received can be through monitoring communication module 2 wireless transmission for feedback display module 5, through handling the data that detect, thereby the size of specific extrusion position and extrusion pressure degree is clearly perceived.

The beneficial effects of the above technical scheme are that: the protection strip 110 can play certain guard action when the rotor 6 hoists, prevent the side direct collision of rotor 6 and stator, and make rotor 6 and stator produce the damage, but the atress change of perception rotor 6 that passes through film pressure sensor 120 is accurate, from realizing better monitoring and protection, the size of protection strip 110 is according to clearance width rational design, compromise commonality and suitability, can just integrate film pressure sensor 120 and circuit to protection strip 110 when the rubber strip takes shape in the preparation in later stage, so not only reduced the installation degree of difficulty, also make the degree of agreeing with between the component higher.

In one embodiment, the monitoring communication module 2 includes: the film pressure sensor monitoring system comprises a multiplexer, a linear voltage converter and a controller, wherein the multiplexer is electrically connected with a plurality of film pressure sensors 120 respectively, the linear voltage converter is electrically connected with the multiplexer and the controller respectively, and the controller is electrically connected with a report warning module 3;

the controller includes single chip microcomputer control unit and wireless network deployment transmission unit, report warning module 3 includes relay and audible-visual annunciator, single chip microcomputer control unit is connected with multiplexer, linear voltage converter, wireless network deployment transmission unit and relay electricity respectively, relay and audible-visual annunciator electricity are connected.

The single chip microcomputer control unit is used for scanning all the film pressure sensors 120 in the protection device 1 when the monitoring communication module 2 is initialized, judging whether a fault sensor exists or not, if the fault sensor exists, feeding fault information back to the control terminal 520 of the feedback display module 5, and if the fault sensor does not exist, enabling the protection device 1 to work normally; when the protection device 1 normally works, the single chip microcomputer control unit circularly monitors all the film pressure sensors 120 through the multiplexer, if one film pressure sensor 120 feeds back abnormally, the single chip microcomputer control unit continuously monitors the film pressure sensor 120 within a preset time threshold, if the film pressure sensor 120 feeds back abnormally continuously within the time threshold, the lifting position of the rotor 6 is judged to be deviated, and if the film pressure sensor 120 interrupts the feedback abnormally within the time threshold, the condition of error touch is judged.

The working principle and the beneficial effects of the technical scheme are as follows: the monitoring communication module 2, the protective device 1 and the report warning module 3 can complete the sensing of pressure, the calculation and uploading of pressure values and the extrusion warning only by the cooperative work, due to the excessive number of membrane pressure sensors 120 of one guard 1, the point-to-point wireless communication cannot be performed, therefore, wireless networking is necessary, a pair of connectors which are convenient to insert and pull are integrated in the connection between the monitoring communication module 2 and the film pressure sensor 120 in the protection strip 110, different protection strips 110 can be arbitrarily connected to a certain monitoring communication module 2, after initialization, the thin film pressure sensor 120 can operate normally, when pressure is applied to any point on the contact surface of the thin film pressure sensor 120, there is a significant resistance change of the thin film pressure sensor 120, the change of the resistance is converted into the change of a voltage signal through the linear voltage converter, so that the digital-to-analog conversion port of the single chip microcomputer control unit can conveniently carry out identification calculation;

the single chip microcomputer control unit is used for scanning all the film pressure sensors 120 in the protection device 1 when the monitoring communication module 2 is initialized, judging whether a fault sensor exists or not, if the fault sensor exists, feeding fault information back to the control terminal 520 of the feedback display module 5, and if the fault sensor does not exist, enabling the protection device 1 to work normally; when the protection device 1 normally works, the single chip microcomputer control unit controls the IO port to circularly monitor all the film pressure sensors 120 through the multiplexer, if one of the film pressure sensors 120 is abnormal in feedback, the single chip microcomputer control unit continuously monitors the film pressure sensor 120 within a preset time threshold, if the film pressure sensor 120 is abnormal in continuous feedback within the time threshold, the hoisting position of the rotor 6 is judged to be deviated, and if the film pressure sensor 120 is abnormal in feedback interruption within the time threshold, the situation of mistaken touch is judged to occur;

if the rotor 6 is obliquely displaced to extrude the protective strip 110 in the hoisting process, the film pressure sensor 120 in the protective strip 110 firstly outputs a feedback signal to the linear voltage converter, the linear voltage converter converts the feedback value of the film pressure sensor 120 into analog quantity and digital quantity to be fed back to the singlechip control unit, the singlechip control unit identifies the analog signal and the digital signal and then calculates the extrusion force, the extrusion force is sent to the control terminal 520 of the feedback display module 5 through the wireless networking transmission unit, and meanwhile, the acousto-optic alarm device in the report warning module 3 is controlled to send out acousto-optic alarm so as to warn field workers;

if the feedback value of the film pressure sensor 120 changes due to the false touch, the singlechip control unit can automatically filter an abnormal value returned due to the false touch through calculation and identification;

report warning module 3 mainly comprises audible-visual annunciator and relay, will control the relay to open audible-visual annunciator and begin work when single chip microcomputer control unit discernment takes place the extrusion, because there is certain noise during factory hoist and mount operation, so choose audible-visual annunciator of suitable power for use, its during operation can produce the warning sound about 100 decibels, than artifical whistle blowing or shouting, the sound of reporting an emergency is heard more clearly, compare in artifical judgement extrusion back warning, with single chip microcomputer control unit control audible-visual annunciator reaction time shorter, take place in extruded millisecond and just can send out the warning, can be more timely warning hoist and mount personnel, in order to further aggravate the extrusion, and lead to producing the damage to equipment.

The type selection of the multiplexer selects CD4501, one-to-many output switching can be realized, and at most 8-to-1 selection can be realized, so that a linear voltage converter can be saved, eight thin film pressure sensors 120 can share one linear voltage converter, the cyclic scanning of eight input and output ports S0-S7 is realized by controlling ABC address bits by a single chip, and the voltage change of each sensor is monitored;

the linear voltage converter is selected, the piezoresistive (resistance type) film pressure sensor 120 is equivalent to a piezoresistor in a circuit, when the pressure sensor has no external load, the circuit is in a high-resistance state, when the external pressure is applied to the sensor, the circuit resistance is reduced, a universal meter is used, the resistance value can be directly read by being connected to two external terminals, the resistance value is changed correspondingly along with the change of the external pressure, the pressure and the resistance form a reverse ratio, and the pressure and the conductance are in a linear relation, so that the pressure change can be reversely deduced according to the change of the conductance, the change of the resistance is converted into the change of the voltage by the linear voltage converter, and the IO port of the singlechip can conveniently read the value; the linear voltage converter has the following characteristics: a can detect the pressure of the film pressure sensor 120; b, the sensitivity is adjustable; c, the working voltage is 3.3V-5V; d output form: analog quantity voltage output, digital switching value output (0 and 1); e, a fixing bolt hole is formed, so that the installation is convenient; f small panel PCB size: 3cm by 1.6 cm; g, a power supply indicator lamp (red) and a digital switching value output indicator lamp (green); the h comparator adopts an LM393 chip, so that the work is stable;

the selection of the singlechip control unit and the wireless networking transmission unit has the advantages that as the hoisting operation is influenced by using a communication line in the hoisting process, the mode of wireless communication is preferentially selected, and the monitoring of a large area of factory area and numerous sensors has to be carried out simultaneously with remote communication and multi-node networking communication, so zigbee communication is selected, and CC2530 is selected in the aspect of a core board of the singlechip control unit; the CC2530 is a true system on chip compatible with IEEE802.15.4, supports proprietary IEEE802.15.4 and ZigBee, ZigBeePRO and ZigBeeRF4CE standards, integrates a 2.4GHz radio frequency transceiver, an 8051MCU of an enhanced industrial standard, a maximum 256KB programmable FLASH and an 8KB RAM, is provided with a set of extensive peripheral sets (comprising 2 USARTs, 12-bit ADCs and 21 general GPIOs), and can be provided with a standard compatible or proprietary network protocol Stack (Remoti, Z-Stack or SimpliciTI) of the TI to simplify development, wherein the RF transmitting output power is 4.5dBm, and the receiving sensitivity is-97 dBm;

the containing modules can be roughly classified into three categories: CPU and memory related module; the CC2530 integrates an 8051 compatible microcontroller, a ZigBee Radio Frequency (RF) front end, an internal memory, a FLASH memory and the like On a single chip, and also comprises a serial interface (UART), an analog-to-digital converter (ADC), a plurality of timers (Timer), an AES128 security coprocessor, a WatchDog Timer (Watchdog Timer)32kHz crystal oscillator sleep mode Timer, a Power-On Reset circuit (Power On Reset), a Power-off Detection circuit (Brown Out Detection) and 21 programmable I0 ports and other external interface units;

the CC2530 can meet the requirements of the protection device 1 on data acquisition, processing and wireless transmission, does not need an additional external wireless transmission module, and is very suitable for the monitoring communication module 2.

In one embodiment, the distance measuring module 4 is arranged in a groove between two adjacent poles of the rotor 6.

The working principle of the technical scheme is as follows: the distance measurement module 4 adopts a single-point laser distance measurement sensor based on the TOF principle.

The beneficial effects of the above technical scheme are that: the distance measuring module 4 is arranged in the groove between the two magnetic poles, so that the influence on the function of measuring the distance caused by the thickness problem of the module is avoided, the laser distance measuring sensor is matched with unique optical and electrical design, stable, accurate and highly sensitive distance measurement can be realized, a product is internally provided with various application environments and adaptive algorithms of targets, and various adjustable configurations and parameters are opened; the precision of the distance measuring module 4 can reach +/-1 mm, the measuring range is 0.1-40m, the speed measurement is 1hz-30hz, the measuring range value can be set through a downlink command, and the measuring effect is better if the distance measuring module is matched with a target reflecting plate; the distance measuring module 4 adopts UART communication mode, and can directly return the measured data to the singlechip control unit, and then return the measured distance data to the control terminal 520 of the feedback display module 5 through the wireless networking transmission unit.

In one embodiment, the feedback presentation module 5 comprises: the wireless receiver 510 is in communication connection with the control terminal 520 through a USB interface arranged on the wireless receiver 510, the wireless receiver 510 is used for receiving information fed back by the monitoring communication module 2, the report warning module 3 and the ranging module 4 and transmitting the information to the control terminal 520, and the control terminal 520 processes the fed-back information data and displays the hoisting process and the state of the rotor 6 through 3D graphic simulation.

The working principle and the beneficial effects of the technical scheme are as follows: the wireless receiver 510 in the feedback display module 5 is a zigbee wireless module with a USB interface, and is used for receiving data transmitted by each node, the data are transmitted to the control terminal 520 in a USB serial port communication mode, the control terminal 520 is a computer upper computer program, the computer upper computer program monitors serial port data, the progress and the state of lifting are calculated through an algorithm after the data are read, the process and the state of the whole lifting are simulated through a 3D graph, specific extrusion positions can be displayed on the control terminal 520 if alarm information exists in the process, and the 3D graph can also generate corresponding changes, so that the lifting state can be displayed more clearly and more intuitively.

In one embodiment, the power supply guarantee module is a rechargeable power supply.

The working principle of the technical scheme is as follows: the power supply guarantee module mainly comprises a 12V chargeable power supply and is used for providing a stable direct current power supply for the protection device 1, the monitoring communication module 2, the report warning module 3 and the distance measuring module 4.

The beneficial effects of the above technical scheme are that: guarantee each module can be under the normal work of stable power supply, and repeatedly chargeable use.

In one embodiment, the electromagnet 130 is a thin sheet, and the material of the protective strip 110 is TPV rubber.

The working principle and the beneficial effects of the technical scheme are as follows: the electromagnet 130 is a thin sheet, so that the thickness of the protection device 1 can be reduced to a certain extent, the ultrathin electromagnet 130 can be customized according to specific requirements, the thickness can reach within 9mm to adapt to specific working scenes, and under the condition of a rated working voltage of 12V, each electromagnet 130 can provide 25KG of suction force; the rubber protective strip 110 adopts EPDM/PP type thermoplastic dynamic vulcanized rubber (TPV), the TPV rubber takes EPDM as a rubber phase and PP as a continuous phase, a stable elastomer is obtained after dynamic vulcanization, the flame-retardant series product can reach UL94-V-0 grade, the oxygen index is 27, the dielectric strength is 20MV/m, the volume resistivity is more than 1x10142m, the TPV rubber has excellent physical and chemical properties, the environment resistance is equivalent to a universal ethylene propylene diene monomer rubber material, and the oil resistance and the solvent resistance are equivalent to those of universal chloroprene rubber; TPV rubbers successfully combine the properties of vulcanized rubbers, such as heat resistance and low compression set, with the easy processability characteristics of thermoplastics; the anti-corrosion and anti-fatigue paint has excellent dynamic fatigue resistance, high tear resistance, excellent weather resistance and good wear resistance, has excellent anti-corrosion capability on water-based acid-base liquid and polar oil products, and has use possibility in the range of-40-150; TPV rubber has elasticity and rebound shrinkage of rubber and excellent permanent deformation resistance, and common TPE and TPR rubber has a compression permanent deformation of 30-40% at 25 ℃ for 168 hours; the compression permanent deformation is 40-55% at 70 ℃ for 168 hours; TPV rubber has a compression set of 15% at 25 ℃ for 168 hours; the compression permanent deformation is 30 percent at 70 ℃ for 168 hours; the hardness range is wide from 25A to 55D, the thermoplastic elastomer has the temperature resistance of (-60 ℃ to 150 ℃), the tensile strength is between 3 MPa and 8MPa, the thermoplastic elastomer has very good compression resistance, and the protective strip 110 can quickly rebound after being extruded;

as shown in fig. 10, the method for calculating the pressure applied to the guard bar 110 during operation is as follows:

wherein, F is the pressure applied by the protective bar 110 during operation, M is the weight of the rotor 6, g is the acceleration of gravity, tan θ is the angle between the axis of the rotor 6 and the steel wire of the crane for hoisting the rotor 6, d is the lateral offset distance of the hoisting point, and h is the height of the hoisting point from the rotor 6;

at present, the maximum weight of the unit rotor 6 is about 2300 tons, and assuming that the lateral offset distance of the lifting point is 2cm and the height of the lifting point is 20m, the extrusion force applied by the protective strip 110 during working is 22540N according to the formula, that is, under the condition that the tensile strength of the protective strip 110 is not damaged, the protective strip 110 made of TPV rubber continuously extrudes the protective strip 110168 hours under the pressure of 22540N to enable the protective strip 110 with the thickness of 1cm to become 0.85cm, and the protective device 1 alarms after the rubber protective strip 110 is extruded in the whole lifting process, and then the crane operator can adjust the lifting position angle, so that the rubber protective strip 110 can not reach the time when the TPV rubber generates permanent deformation in the whole lifting process, and the TPV rubber can be completely suitable for use.

In one embodiment, further comprising a positioning module, the positioning module comprising: a measuring unit, a correcting unit, a calculating unit and an adjusting unit,

the measuring unit is used for measuring a plurality of measuring point data of the outer peripheral surface of the rotor 6 in real time when the rotor is hoisted from a plurality of different directions on the same plane, the measuring unit comprises a plurality of laser ranging devices 7, the plurality of laser ranging devices 7 are uniformly distributed along the circumferential direction of a machine pit and are arranged higher than the top of the machine pit, the number of the laser ranging devices 7 is even and are arranged in a pairwise opposite mode, light beams emitted by the laser ranging devices 7 vertically penetrate through the central axis of a stator, the distance between each laser ranging device 7 and the central axis of the stator is equal, and the measuring point data is obtained by measuring the distance between each laser ranging device 7 and the outer peripheral surface of the rotor 6 during hoisting by the laser ranging devices 7;

the correcting unit is used for processing a plurality of measuring point data of the measuring unit by adopting a system error correcting method, selecting abnormal data in the plurality of measuring point data, correcting the selected abnormal data to obtain corrected measuring point data, drawing a cross-section curve of the rotor 6 during hoisting at a certain moment according to the corrected plurality of measuring point data,

wherein, 6 section curve's of rotor when hoist and mount at a certain moment drawing includes: taking the plane of the measuring unit as a reference plane, taking the intersection point of the central axis of the stator and the reference plane as an origin, establishing a rectangular coordinate system in the reference plane, calibrating the coordinates of each laser ranging device 7 and the coordinates of the corrected plurality of measuring points in the rectangular coordinate system, and drawing a section curve of the rotor 6 on the reference plane at the time according to the coordinates of the plurality of measuring points in the reference plane;

the judging subunit is configured to judge a shape of a cross-sectional curve of the rotor 6 generated by the correcting unit, where the shape of the cross-sectional curve includes an ellipse and a circle;

the first calculating subunit is configured to calculate a first adjustment parameter of the rotor 6 when the cross-sectional curve is elliptical, and adjust the elliptical cross-sectional curve to be a circular cross-sectional curve according to the first adjustment parameter by the adjusting unit;

the second calculating subunit is configured to calculate a second adjustment parameter of the rotor 6 when the cross-sectional curve is circular;

the first adjustment parameters comprise the deflection direction and the deflection angle of the rotor 6, when the cross-sectional curve is elliptical, the rotor 6 hoisted at a certain moment is considered to be inclined, the deflection angle of the rotor 6 can be calculated through the major axis radius of the elliptical cross-sectional curve and the radius of the rotor 6, the deflection direction of the rotor 6 can be obtained through major axis coordinate information of the elliptical cross-sectional curve, and the hoisting deflection of the rotor 6 is adjusted by controlling the hoisting machine through the adjustment unit according to the deflection angle and the deflection direction;

the second adjustment parameter comprises offset distances of the rotor 6 on an x axis and a y axis, when the cross-sectional curve is circular, the rotor 6 hoisted at a certain moment is not inclined, the center point coordinate of the circular cross-sectional curve is obtained through calculation, the center point coordinate of the reference cross-sectional curve of the rotor 6 in the reference plane is an original point, and the translation distances of the crane on the x axis and the y axis can be adjusted through the adjustment unit according to the center point coordinate information, so that the circular cross-sectional curve is overlapped with the reference cross-sectional curve;

and the adjusting unit adjusts and positions the position of the rotor 6 through a crane for hoisting the rotor 6 according to the calculation result of the calculating unit.

The method for determining the coordinates of the measuring points comprises the following steps:

step 1, establishing a coordinate system in a reference plane, and calibrating the coordinate of each laser ranging device 7 to be (x)_ai，y_ai)，x_aiAnd y_aiCoordinates of the ith laser ranging device 7 on the x axis and the y axis respectively;

step 2, measuring point coordinates (x)_bi，y_bi) Calculated by the following formula:

wherein S is the distance from the laser ranging device 7 to the central axis of the stator, D_iThe distance alpha between the ith laser ranging device 7 and the peripheral surface of the rotor 6 during hoisting_iIs the angle between the laser beam emitted by the ith laser ranging device 7 and the y axis, x_biAnd y_biCoordinates of a measuring point measured by the ith laser ranging device 7 on the x axis and the y axis respectively;

calculating the horizontal coordinate value | x of the measuring point_bi| and ordinate values | y_biAccording to the coordinates (x) of the laser distance measuring device 7_ai，y_ai) To determine the sign, i.e. to determine the coordinates (x) of the measuring points_bi，y_bi)。

The working principle of the technical scheme is as follows: the correction unit, the calculation unit and the adjustment unit all belong to the control terminal 520, the measurement unit is in communication connection with the control terminal, the laser ranging devices 7 are arranged in a plurality and even number and are arranged above the top surface of the machine pit, the laser ranging devices 7 are connected with the top surface of the machine pit through the calibration device, the laser ranging devices 7 are provided with vibration sensors, whether the positions of the laser ranging devices 7 in operation and the laser emission angles are abnormal or not is judged through sensing vibration, if the positions are abnormal, the positions of the laser ranging devices 7 and the angles of the laser generated by the laser ranging devices are calibrated through the calibration device, and the measurement accuracy is guaranteed; the laser ranging devices 7 form a circular array around the pit, the laser ranging devices 7 are arranged in pairs in an opposite mode, namely lasers emitted by the two oppositely-arranged laser ranging devices 7 are collinear, all the laser ranging devices 7 work simultaneously during hoisting, emitted lasers fall on the outer surface of the rotor 6 at the same time, a plane formed by all laser beams is preset to be a reference plane, the intersection point of the central axis of the stator and the reference plane is an original point, a coordinate system is established in the reference plane, and the coordinate of each laser ranging device 7 can be calibrated to be (x) coordinate_ai，y_ai)，x_aiAnd y_aiCoordinates of the ith laser ranging device 7 on the x-axis and the y-axis, respectively, the coordinates (x) of the measuring point_bi，y_bi) Calculated by the following formula:

as shown in FIG. 12, the distance S between the laser ranging device 7 and the central axis of the stator and the included angle alpha between the laser beam emitted by the ith laser ranging device 7 and the y axis_iThe distance D between the ith laser distance measuring device 7 and the outer peripheral surface of the rotor 6 during hoisting is determined when the laser distance measuring devices 7 are installed, namely, is a known quantity_iThe coordinate (x) of the measuring point can be calculated by correcting the coordinate by the correcting unit and then substituting the corrected coordinate into the formula_bi，y_bi) Drawing a section curve of the rotor 6 during hoisting at a certain moment according to the coordinates of the measuring points; for example, the number of the laser distance measuring devices 7 is set to 8, and the coordinate quadrant of a certain laser distance measuring device 7 marked in fig. 12 is taken as an example, the included angle α between the emitted laser beam and the y-axis is_iIs 45 degrees, the distance S between the laser ranging device 7 and the central axis of the stator is taken

Coordinates (x) of a certain laser distance measuring device 7_ai，y_ai) Is (7, -7), the measured Di is

Then substituting the above equation can calculate | x_bi|＝5，|y_biThe coordinates of the measuring point (x) can then be determined from the quadrant in which the laser distance measuring device 7 coordinates lie | ═ 5_bi，y_bi) I.e. (5, -5), from which the coordinates (x) of the measuring points determined by each laser distance measuring device 7 can be derived_bi，y_bi) Drawing the rotor in a reference planeA cross-sectional curve;

then, the shape of the cross-section curve of the rotor 6 is judged and a first adjusting parameter and a second adjusting parameter are calculated through a calculating unit, after the shape of the cross-section curve is judged, if the cross-section curve is an elliptical cross-section curve, the first calculating subunit and the adjusting unit calculate and adjust the cross-section curve, the cross-section curve is a circular cross-section curve after adjustment, then the second calculating subunit and the adjusting unit calculate and adjust the cross-section curve, and if the cross-section curve is judged to be circular, the second calculating subunit and the adjusting unit directly adjust the cross-section curve; the first adjustment parameter is determined, because the rotor 6 is cylindrical, when the axis of the rotor deflects due to hoisting, the cross section passing through the measuring unit is elliptical, the direction of two laser ranging devices 7 on the straight line where the major axis of the ellipse is located is the deflection direction of the rotor 6, the included angle beta between the radius R of the major axis of the ellipse and the radius R of the rotor 6 is the deflection angle of the rotor 6, and the ratio of the radius R of the rotor 6 to the radius R of the major axis is equal to the cosine value of the deflection angle, namely

The radius R of the long shaft is half of the distance value between two end points of the long shaft and can be obtained by calculating the coordinates of the measuring points, and the radius R of the rotor 6 is known, so that a first adjusting parameter can be obtained; and determining a second adjusting parameter, namely determining the coordinate of the central point of the circular section curve by the coordinate of the measuring point on the circular section curve, wherein the absolute value of the coordinate of the central point is the offset distance of the rotor 6 on the x axis and the y axis, and then adjusting the position of the rotor 6 by an adjusting unit according to the offset distance so as to enable the axis of the offset rotor 6 to coincide with the central axis of the stator, thereby realizing the accurate positioning of the rotor 6.

The beneficial effects of the above technical scheme are that: the laser distance measuring devices 7 are used for jointly detecting the section curve shape of the rotor 6 hoisted through a reference plane in real time to simultaneously judge whether axial deflection and radial deviation occur during the hoisting of the rotor 6 and carry out real-time adjustment, the precise positioning and adjustment of the hoisting of the rotor 6 are realized by matching with the protection device 1, the measurement point data can be corrected through the correction unit to eliminate error values, for example, when laser is applied to a groove between adjacent magnetic poles on the surface of the rotor 6, the distance between the groove and the surface of the rotor 6 is a known fixed value, the correction unit can compensate the measurement point data to obtain more accurate data, so that the drawn curve is more precise, the position of the measurement point is calculated by adopting the formula, the positioning precision and the adjustment precision of the rotor 6 are further improved, and the safety of the hoisting process of the rotor 6 is ensured, prevent it and stator collision and produce the damage, for the hoist and mount operation of rotor 6 provides very big facility.

In one embodiment, the welding portion of the welding column of the film pressure sensor 120 and the lead 9 is sleeved with a protection mechanism 8, and the protection mechanism 8 includes: the protection plate 830 is in a semi-arc shape, the protection plate 830 is inserted in the first round hole 811 in a sliding manner, the two protection plates 830 are connected through a clamping device 860, a welding part is fixed between the two protection plates 830, and a wire 9 can pass through the first round hole 811;

the clip 860 includes: the locking device comprises locking columns 861, wherein one side of one of the protection plates 830 is provided with the locking column 861, one side of the other protection plate 830 is provided with a third round hole 862 corresponding to the locking column 861, grooves are symmetrically formed in two sides of the locking column 861, a hook-shaped movable block 863 is rotatably connected in each groove, a second spring 864 is arranged between each hook-shaped movable block 863 and each groove, one side of each third round hole 862 is provided with a locking hole 865, a locking plate 866 is slidably arranged in each locking hole 865 along the length direction of the corresponding locking column 861, the lower portion of each locking column 861 penetrates through the locking plate 866, the top surface of the locking plate 866 is provided with a locking groove 867 corresponding to each hook-shaped movable block 863, and a third spring 868 is arranged between the bottom surface of the locking plate 866 and the bottom surface of the locking hole 865.

The working principle of the technical scheme is as follows: the protection mechanism 8 is arranged inside the protection strip 110, the thickness of the protection mechanism 8 is smaller than that of the protection strip 110, the protection strip 110 cannot be supported, the protection strip 110 is directly contacted with the film pressure sensor 120 and the movable sleeve 810, when the protection strip 110 is stressed, pressure can directly act on the film pressure sensor 120 and the movable sleeve 810, and therefore the protection mechanism 8 can protect a welding part and cannot influence the sensitivity of the film pressure sensor 120; the movable sleeve 810 is fixedly connected with the protective strip 110, the movable sleeve 810 is slidably connected with the sliding rod 820 and the protective plate 830, when the protective plate 830 is installed, the two movable sleeves 810 are firstly stretched towards two sides, the protective plate 830 is separated from the first round hole 811, the first spring 840 is in a stretching state, the two protective plates 830 are contracted towards two sides through the telescopic rod 850 at the moment, then the conducting wire 9 penetrates through the first round hole 811, then the position of the welding part is found, the two protective plates 830 are moved towards one side of the welding part, the two protective plates 830 are locked and fixed through the clamping device 860, then under the elastic force of the first spring 840, the two cylindrical ends formed by the two protective plates 830 are inserted into the first round hole 811, when the protective plates 830 are locked, the clamping columns 861 are inserted into the third round hole 862 and the clamping hole 865 in sequence, under the pressure of the third round hole 862, the hook-shaped movable block 863 is contracted in the groove, when the hook-shaped movable block 863 enters the clamping hole 865, the bottom of the hook-shaped movable block 863 presses the locking plate 866, the locking plate 866 can compress the third spring 868, when the hook-shaped movable block 863 moves to the right position, the locking plate 866 can be clamped on a step surface formed by the clamping hole 865 and the third round hole 862 under the action of the second spring 864, and meanwhile, under the action of the third spring 868, the locking plate 866 can move to one side of the hook-shaped movable block 863 to press the bottom of the hook-shaped movable block 863 in the locking groove 867 to complete clamping and locking.

The beneficial effects of the above technical scheme are that: through the design of the above structure, after the protection mechanism 8 is installed, the movable sleeve 810 of the protection mechanism 8 is fixedly connected with the protection bar 110, that is, when the protection bar 110 is compressed in the front, under the elastic deformation of the protection bar 110, the protection bar 110 itself can be stretched to the side, and the stretching process can drive the object in contact with the protection bar to move along the stretching direction, at the moment, the movable sleeve 810 can move along the stretching direction under the stretching action of the protection bar 110 to ensure that the protection plate 830 is always in a fixed state, thereby ensuring that the welding part in the protection plate 830 can not be broken due to the stretching influence, the first spring 840 and the sliding rod 820 can ensure that the movable sleeve 810 does not depart from the protection plate 830 to play a protection role, therefore, the welding part of the film pressure sensor 120 can not be broken due to the stretching influence under the multiple extrusion deformation of the protection bar 110, and ensuring that the film pressure sensor 120 can work normally, thereby prolonging the service life of the shielding device 1.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. Generator rotor hoist and mount air gap monitoring system, its characterized in that includes: a protective device (1), a monitoring communication module (2), a report warning module (3), a distance measuring module (4), a feedback display module (5) and a power supply guarantee module,

the protective device (1) is arranged on the magnetic pole on the side face of the rotor (6) and used for collision perception feedback of the rotor (6);

the monitoring communication module (2) is used for receiving and processing feedback information of the protection device (1) and sending an instruction to the report warning module (3);

the report warning module (3) is used for receiving the instruction of the monitoring communication module (2) and giving an alarm;

the distance measuring module (4) is used for measuring the distance between the rotor (6) and the bottom of the machine pit;

the feedback display module (5) receives and processes information fed back by the monitoring communication module (2), the report warning module (3) and the ranging module (4), and displays the hoisting process and the state of the rotor (6) through 3D graphic simulation;

the power supply guarantee module is used for providing power for the protection device (1), the monitoring communication module (2), the report warning module (3) and the ranging module (4).

2. Generator rotor lifting air gap monitoring system according to claim 1, wherein the shielding device (1) comprises: protection strip (110), film pressure sensor (120) and electro-magnet (130), the inside of protection strip (110) evenly is equipped with a plurality of film pressure sensor (120) along its length direction, the back of protection strip (110) evenly is equipped with a plurality of electro-magnet (130), the inside of protection strip (110) just is located the both sides of film pressure sensor (120) are equipped with trough (111), the surface of electro-magnet (130) with the surface parallel and level of protection strip (110).

3. Generator rotor lifting air gap monitoring system according to claim 2, wherein the monitoring communication module (2) comprises: the film pressure sensor monitoring system comprises a multiplexer, a linear voltage converter and a controller, wherein the multiplexer is electrically connected with a plurality of film pressure sensors (120) respectively, the linear voltage converter is electrically connected with the multiplexer and the controller respectively, and the controller is electrically connected with a report warning module (3);

the controller comprises a single chip microcomputer control unit and a wireless networking transmission unit, the report warning module (3) comprises a relay and an audible and visual alarm, the single chip microcomputer control unit is respectively electrically connected with the multiplexer, the linear voltage converter, the wireless networking transmission unit and the relay, and the relay is electrically connected with the audible and visual alarm.

4. The generator rotor hoisting air gap monitoring system according to claim 3, wherein the single chip microcomputer control unit is configured to scan all the film pressure sensors (120) in the protection device (1) when the monitoring communication module (2) is initialized, determine whether a fault sensor exists, feed back fault information to the control terminal (520) of the feedback display module (5) if the fault sensor exists, and enable the protection device (1) to normally operate if the fault sensor does not exist; when the protection device (1) normally works, the single chip microcomputer control unit circularly monitors all the film pressure sensors (120) through the multiplexer, if one film pressure sensor (120) is abnormal in feedback, the single chip microcomputer control unit continuously monitors the film pressure sensor (120) within a preset time threshold, if the film pressure sensor (120) is abnormal in continuous feedback within the time threshold, the lifting position of the rotor (6) is judged to be deviated, and if the film pressure sensor (120) is abnormal in interrupted feedback within the time threshold, the condition of mistaken touch is judged to occur.

5. Generator rotor lifting air gap monitoring system according to claim 1, wherein the distance measuring module (4) is arranged in a groove between two adjacent poles of the rotor (6).

6. Generator rotor lifting air gap monitoring system according to claim 1, wherein the feedback demonstration module (5) comprises: wireless receiver (510) and control terminal (520), wireless receiver (510) are through the USB interface and control terminal (520) communication connection that are equipped with on it, wireless receiver (510) are used for receiving the information of monitoring communication module (2), report warning module (3) and ranging module (4) feedback to transmit to control terminal (520), handle the information data of feedback and show the hoist and mount process and the state of rotor (6) through 3D graphic simulation by control terminal (520).

7. The generator rotor lifting air gap monitoring system of claim 1, wherein the power supply assurance module is a rechargeable power supply.

8. The generator rotor lifting air gap monitoring system according to claim 2, wherein the electromagnet (130) is of a thin sheet type, and the material of the guard strip (110) is TPV rubber.

9. The generator rotor lifting air gap monitoring system of claim 1, further comprising a positioning module, the positioning module comprising: a measuring unit, a correcting unit, a calculating unit and an adjusting unit,

the measuring unit is used for measuring a plurality of measuring point data of the outer peripheral surface of the rotor (6) in real time in the hoisting process from a plurality of different directions on the same plane, the measuring unit comprises a plurality of laser ranging devices (7), the laser ranging devices (7) are uniformly distributed along the circumferential direction of a machine pit and are arranged higher than the top of the machine pit, the number of the laser ranging devices (7) is even and are arranged in a pairwise opposite mode, light beams emitted by the laser ranging devices (7) vertically penetrate through the central axis of a stator, the distance between each laser ranging device (7) and the central axis of the stator is equal, and the measuring point data is obtained by measuring the distance between each laser ranging device (7) and the outer peripheral surface of the rotor (6) in the hoisting process;

the correction unit is used for processing a plurality of measuring point data of the measuring unit by adopting a system error correction method, selecting abnormal data in the plurality of measuring point data, correcting the selected abnormal data to obtain corrected measuring point data, drawing a cross section curve of the rotor (6) during hoisting at a certain moment according to the corrected plurality of measuring point data,

wherein, the drawing of the rotor (6) section curve during hoisting at a certain moment comprises the following steps: taking the plane of the measuring unit as a reference plane, taking the intersection point of the central axis of the stator and the reference plane as an origin, establishing a rectangular coordinate system in the reference plane, calibrating the coordinates of each laser ranging device (7) and the coordinates of the corrected multiple measuring points in the rectangular coordinate system, and drawing the cross-sectional curve of the rotor (6) on the reference plane at the time according to the coordinates of the multiple measuring points in the reference plane;

the judging subunit is used for judging the shape of a cross-sectional curve of the rotor (6) generated by the correcting unit, and the shape of the cross-sectional curve comprises an ellipse and a circle;

the first calculating subunit is used for calculating a first adjusting parameter of the rotor (6) when the cross-sectional curve is elliptical, and adjusting the elliptical cross-sectional curve to be a circular cross-sectional curve through the adjusting unit according to the first adjusting parameter;

the second calculating subunit is used for calculating a second adjusting parameter of the rotor (6) when the cross-section curve is circular;

the first adjustment parameters comprise the deflection direction and the deflection angle of the rotor (6), when the cross-sectional curve is elliptical, the rotor (6) hoisted at a certain moment is considered to be inclined, the deflection angle of the rotor (6) can be calculated through the major axis radius of the elliptical cross-sectional curve and the radius of the rotor (6), the deflection direction of the rotor (6) can be obtained through major axis coordinate information of the elliptical cross-sectional curve, and the hoisting deflection of the rotor (6) is adjusted by controlling the hoisting machine through the adjustment unit according to the deflection angle and the deflection direction;

the second adjustment parameter comprises offset distances of the rotor (6) on an x axis and a y axis, when the cross-sectional curve is circular, the rotor (6) hoisted at a certain moment is not inclined, the center point coordinate of the circular cross-sectional curve is obtained through calculation, the center point coordinate of the reference cross-sectional curve of the rotor (6) in the reference plane is the original point, and the translation distances of the crane on the x axis and the y axis can be adjusted through the adjustment unit according to the center point coordinate information, so that the circular cross-sectional curve is overlapped with the reference cross-sectional curve;

and the adjusting unit adjusts and positions the position of the rotor (6) through a crane for hoisting the rotor (6) according to the calculation result of the calculating unit.

10. Generator rotor lifting air gap monitoring system according to claim 2, wherein the welded part of the weld column and the wire (9) of the membrane pressure sensor (120) is provided with a protection mechanism (8), the protection mechanism (8) comprises: the protective plate comprises two movable sleeves (810), two sliding rods (820) and two protective plates (830), wherein the two movable sleeves (810) are symmetrically arranged, a first round hole (811) is formed in the center of each movable sleeve (810), two sides of each first round hole (811) are symmetrically provided with a second round hole (812), the sliding rods (820) are inserted in the second round holes (812) in a sliding mode, a first spring (840) is connected between the end portion of each sliding rod (820) and the bottom of each second round hole (812), an expansion rod (850) is arranged in the middle of each sliding rod (820), the other end of each expansion rod (850) is connected with the middle of one side of each protective plate (830), each protective plate (830) is in a semi-arc shape, each protective plate (830) is inserted in the corresponding first round hole (811) in a sliding mode, the two protective plates (830) are connected through a clamping device (860), and welding portions are fixed between the two protective plates (830), the lead (9) can pass through the first round hole (811);

the clip device (860) comprises: clamping columns (861), one side of one protection plate (830) is provided with the clamping column (861), one side of the other protection plate (830) is provided with a third round hole (862) corresponding to the clamping column (861), grooves are symmetrically arranged at both sides of the clamping column (861), hook-shaped movable blocks (863) are rotationally connected in the grooves, a second spring (864) is arranged between the hook-shaped movable block (863) and the groove, a clamping hole (865) is formed in one side of the third round hole (862), a locking plate (866) is arranged in the clamping hole (865) in a sliding mode along the length direction of the clamping column (861), the lower part of the clamping column (861) penetrates through the locking plate (866), the top surface of the locking plate (866) is provided with a locking groove (867) corresponding to the hook-shaped movable block (863), and a third spring (868) is arranged between the bottom surface of the locking plate (866) and the bottom surface of the clamping hole (865).