CN113294277B - Detection device and detection method for axial displacement of hydroelectric generating set - Google Patents

Abstract

The utility model belongs to the technical field of hydroelectric generation, a hydroelectric set axial displacement's detection device and detection method is related to, including displacement detection module, oil temperature detection module, alarm module and maintenance module, displacement detection module is located rotor one side and is used for detecting the axial displacement of rotor, oil temperature detection module is used for detecting the oil temperature between thrust tile and the thrust dish, displacement detection module and oil temperature detection module all are connected on alarm module, maintenance module is connected with alarm module and is used for overhauing the rotor. This application has the effect of the axial displacement's of being convenient for in time discover the rotor the condition.

Description

Detection device and detection method for axial displacement of hydroelectric generating set

Technical Field

The application relates to the field of hydroelectric power generation technology, in particular to a detection device and a detection method for axial displacement of a hydroelectric generating set.

Background

The axial displacement of the hydroelectric generating set is kept within an allowable range, generally not more than 1.0mm, and if the axial displacement exceeds the value, friction collision of a moving part and a static part can be caused, so that serious damage accidents such as shaft bending, partition plate and impeller cracking, large-scale blade breakage of a steam turbine and the like can be caused, and the index of the axial displacement of the rotor is mainly used for monitoring the working condition of the thrust bearing.

At present, the thrust pads of the hydraulic generator bear the entire weight of the rotating part of the unit and the axial force of the water flow and transmit the same to the load frame. The thrust bearing comprises a thrust head, a mirror plate, a thrust tile, a bearing seat, an oil groove, a cooler and the like. The thrust head and the mirror plate rotate along with the main shaft, and the thrust tile is made into a fan-shaped block type and is supported by the bearing seat. Turbine oil is contained in the oil groove, the oil plays a role in lubrication and is a heat exchange medium, and when the unit operates, heat generated by mutual friction of the thrust bearing and the mirror plate is cooled by the oil cooler and taken away. When the axial displacement of the rotor occurs, the damage accident can occur only when the displacement exceeds 1.0mm, and when the displacement is less than 1.0mm, although the accident of the unit is not caused, certain abrasion can still be generated on the unit.

In view of the above-mentioned related technologies, the inventor believes that the service life of the unit is affected if the unit is not found in time when the unit is worn for a long time.

Disclosure of Invention

In order to facilitate the condition of in time discovering the axial displacement of rotor, this application provides a hydroelectric set axial displacement's detection device and detection method.

First aspect, the application provides a detection device of hydroelectric set axial displacement adopts following technical scheme:

a detection device for axial displacement of a hydroelectric generating set comprises a displacement detection module, an oil temperature detection module, an alarm module and an overhaul module, wherein the displacement detection module is positioned on one side of a rotor and used for detecting the axial displacement of the rotor;

the displacement detection module comprises a detection plate and a support, the support is arranged on the ground, the detection plate is hinged to the upper end of the support, the rotation axis of the detection plate is horizontally arranged, the force arm of the detection plate far away from the rotor is larger than that of the detection plate close to the rotor, one end of the detection plate close to the rotor is in lap joint with the upper surface of the rotor, a marker is arranged on the other side of the support, a marker plate is arranged on one side of the detection plate far away from the rotor, and a marker for marking the marker plate is arranged at one end of the detection plate close to the marker plate.

By adopting the technical scheme, in the process of rotating the rotor, the displacement detection module detects the distance of the axial displacement of the rotor along the rotating shaft, when the axial displacement of the rotor exceeds a preset value, the alarm module gives an alarm, then the maintenance module is used for timely maintaining the rotor, the oil temperature detection module can detect the oil temperature of cooling oil between the thrust bearing bush and the thrust disc, when the oil temperature is higher than a certain value, the alarm module gives an alarm, and then the maintenance module is used for timely maintaining the rotor; when the rotor upwards displaces, the detection plate is driven to upwards displace, and because the distance between the bracket and one side of the detection plate close to the rotor is larger than the distance between the bracket and the other side of the detection plate, one end of the detection plate far away from the rotor side is marked on the marking plate through the marking piece, the axial displacement of the rotor can be amplified through the mark on the marking plate, and the condition of the axial displacement of the rotor can be conveniently observed.

Optionally, the marking member includes a marking pen, the marking pen is fixedly connected to one end of the detection plate far away from the rotor and is used for marking on the marking plate, a camera unit for observing the marking is arranged on the marking plate, the camera unit is connected with the maintenance module, and the maintenance module includes a display for receiving camera information of the camera unit.

Through adopting above-mentioned technical scheme, drive pick-up plate pivoted in-process at the rotor, the pick-up plate drives the marker pen and carries out the mark on the mark plate, then makes a video recording through the mark on the unit with the mark on the mark plate of making a video recording to the information transmission of making a video recording is to overhauing the module, and the staff is through observing the display, monitors the axial displacement's of rotor the condition, and the module of overhauing simultaneously can make corresponding measure according to the mark information.

Optionally, the oil temperature detection module includes a temperature sensor, the temperature sensor is disposed on the thrust pad and is used for detecting the oil temperature between the thrust disc and the thrust pad, the alarm module includes a counter, and the counter is in signal connection with the temperature sensor and is used for receiving information that the oil temperature exceeds a preset temperature and counting the information.

Through adopting above-mentioned technical scheme, because the highest temperature of the oil film that the cooling oil formed between thrust tile and the thrust dish is 60 degrees centigrade, when exceeding 60 degrees centigrade, the produced heat of high-speed rotation of rotor is not in time released, thereby burn out the thrust tile, cause serious accident, and temperature sensor can detect the temperature of cooling oil in real time, and when the oil temperature exceeded 50 degrees centigrade, be in the condition dangerous relatively promptly, and count the number of times that the oil temperature that detects temperature sensor surpassed 50 degrees centigrade through the counter, when exceeding certain number of times, explain that the cooling effect of this cooling oil weakens, need change.

Optionally, a plurality of groups of button switches are arranged on the marking plate, the button switches are arranged at different heights and are used for shifting the marking pen, and the button switches are connected with the alarm module.

By adopting the technical scheme, the camera shooting unit needs a worker to observe the marking condition of the marking plate at the position of the display, and when the condition that the worker goes out occurs, the marking pen can touch the button switches with different heights when rotating, the button switches are connected with the alarm module, and the alarm module can display the axial displacement of the rotor in different degrees through alarming.

Optionally, the alarm module includes an acousto-optic prompt unit, the acousto-optic prompt unit is connected to the plurality of button switches and performs acousto-optic alarm, and the acousto-optic prompt unit is connected to the counter and is configured to receive count information of the counter exceeding a preset number of times.

Through adopting above-mentioned technical scheme, when the pick-up plate upwards overturned, touch not button switch of co-altitude through the marker pen, thereby trigger the acousto-optic warning unit that corresponds and report to the police and remind the staff, when the counter detected that the oil temperature surpassed the condition of 50 degrees and surpassed preset number of times, acousto-optic detection unit carried out acousto-optic warning and reminded the staff in time to change the coolant oil simultaneously.

In a second aspect, the application provides a method for detecting axial displacement of a hydroelectric generating set, which adopts the following technical scheme:

a method for detecting the axial displacement of a water-turbine generator set, which is applied to the device for detecting the axial displacement of the water-turbine generator set,

the method comprises the following steps: acquiring the oil temperature between the thrust disc and the thrust shoe, and acquiring the displacement of the detection plate;

if the oil temperature is higher than the preset value, accumulating the times higher than the preset value, starting an alarm when the accumulated times exceed the preset value, and selecting proper maintenance personnel to replace the cooling oil;

and if the displacement of the detection plate exceeds a preset value, starting an alarm, and selecting a proper maintenance worker to overhaul the rotor.

By adopting the technical scheme, in the process of rotating the rotor, the thrust disc on the rotor moves towards the thrust pad, the rotor rotates at a high speed to generate heat, then the heat is released through the cooling oil, if the cooling oil leaks or goes bad, the oil temperature of the cooling oil cannot be timely reduced, and the oil temperature is increased; if the oil temperature is higher than a preset value, counting, and starting an alarm when the counted number of times exceeds the preset value and represents that the cooling oil needs to be replaced; and meanwhile, the axial displacement condition of the rotor can be displayed by observing the marks made on the marking plate by the marking pen.

Optionally, the step of selecting a suitable maintenance person to overhaul the rotor is as follows:

acquiring the longest downtime information of the rotor;

based on the longest downtime information of the rotor, acquiring the number information of required maintenance workers by taking the current longest downtime information of the rotor as an inquiry object from a first database storing the number of maintenance workers corresponding to the longest downtime of the rotor;

and screening out a proper number of maintenance personnel and informing the maintenance personnel by taking the number of the maintenance personnel as an inquiry object from a second database in which the names of all the maintenance personnel and the corresponding work information are stored.

By adopting the technical scheme, the number of maintenance personnel in charge of related matters such as maintenance of the rotor is large, the shutdown time of the hydraulic turbine set is uncertain, if the hydraulic power station has the standby set, the shutdown maintenance time is long, if the hydraulic power station does not have the standby set, the shutdown time of the hydraulic turbine set needs to be shortened in order to ensure that the influence range of power failure is reduced, more maintenance personnel are needed to be simultaneously cooperated for maintenance, the number of the maintenance personnel is judged according to the shutdown time, and then the corresponding maintenance personnel are informed to jointly maintain the rotor.

Optionally, the step of synchronously acquiring the oil temperature information between the thrust disc and the thrust shoe is as follows:

acquiring the purity of cooling oil between the thrust disc and the thrust pad;

and if the purity of the cooling oil is lower than a preset value, notifying maintenance personnel to replace the cooling oil.

Through adopting above-mentioned technical scheme, when the purity of cooling oil reduced, the cooling oil exists a large amount of impurity on behalf of, then can seriously influence the cooling effect of cooling oil, needs the purity of survey cooling oil to judge whether need change cooling oil, when the purity is less than the default, need maintenance personal to change cooling oil.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the process of rotating the rotor, the oil temperature detection module is used for detecting the oil temperature, the alarm module is used for giving an alarm, then the maintenance module is used for timely maintaining the rotor, the marks on the mark plates can amplify the axial displacement of the rotor, and the condition of the axial displacement of the rotor can be conveniently observed;

2. determining the purity of the cooling oil to judge whether the cooling oil needs to be replaced, and starting an alarm to replace the cooling oil when the purity is lower than a preset value;

3. the number of maintenance personnel can be judged according to the shutdown time of the unit, and then the corresponding maintenance personnel are informed to maintain the rotor together.

Drawings

Fig. 1 is a schematic structural diagram of an overall module of a detection device for axial displacement of a hydroelectric generating set according to an embodiment of the present application.

Fig. 2 is a front view of a detecting device for axial displacement of a hydroelectric generating set according to an embodiment of the present application.

Fig. 3 is a step schematic diagram of a method for detecting axial displacement of a hydro-turbo generator set according to an embodiment of the present application.

Fig. 4 is a schematic diagram of the specific steps for selecting a suitable serviceman mentioned at S200 in fig. 3.

Description of reference numerals: 1. a rotor; 2. a work table; 3. a displacement detection module; 31. detecting a plate; 32. a bracket, 33, a marking plate; 34. a marking pen; 35. a first camera; 4. an oil temperature detection module; 41. a temperature sensor; 42. a counter; 43. a controller; 5. a cooling oil detection module; 51. a magnifying glass; 52. a second camera; 6. an alarm module; 61. an acousto-optic prompt unit; 7. a maintenance module; 71. a display; 72. a first database; 73. a second database; 81. a first push button switch; 82. a second push button switch; 83. a third push button switch; 84. a fourth push button switch; 9. a thrust disc; 10. a thrust pad; 11. an oil sump; 12. and (4) inserting grooves.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-4 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The embodiment of the application discloses hydroelectric set axial displacement's detection device. Referring to fig. 1, the detection device comprises a displacement detection module 3, an oil temperature detection module 4, a cooling oil detection module 5, an alarm module 6 and an overhaul module 7, wherein the displacement detection module 3 is arranged at the upper end of a rotor 1, the oil temperature detection module 4 is arranged between a thrust shoe 10 and a thrust disc 9, the displacement detection module and the oil temperature detection module 4 are both in signal connection with the input end of the alarm module 6, and the output end of the alarm module 6 is connected with the overhaul module 7; meanwhile, when the oil temperature between the thrust bearing 10 and the thrust disc 9 exceeds a preset range, the cooling effect of the cooling oil is reduced, the alarm module 6 is started to give an alarm, then the alarm module 6 sends alarm information to the maintenance module 7, and the cooling oil in the oil groove 11 is replaced in time.

Referring to fig. 2, the displacement detection module 3 includes a detection plate 31 and a support 32, a workbench 2 is arranged at the periphery of the rotor 1, the support 32 is vertically welded on the upper surface of the workbench 2, the support 32 is vertically arranged, the cross section of the support 32 is rectangular, the upper end of the support 32 is rotatably connected with a rectangular detection plate 31 through a rotating shaft, the rotating axis of the detection plate 31 is horizontally arranged, an insertion groove 12 is formed in the circumferential direction of the side wall of the rotor 1, the insertion groove 12 is annular, one end of the detection plate 31 is inserted into the insertion groove 12, and when the rotor 1 is displaced along the vertical direction, the detection plate 31 can be driven to turn over up and down within a certain angle; the ratio of the moment arm of the detection plate 31 close to the rotor 1 to the moment arm far away from the rotor 1 is 1: 10; one side that rotor 1 was kept away from to pick-up plate 31 is provided with rectangle mark plate 33, rectangle mark plate 33 welds perpendicularly on workstation 2 upper surface, the one end that rotor 1 was kept away from to pick-up plate 31 is provided with the marker, the marker is at the in-process of following pick-up plate 31 upset from top to bottom and is made the mark on mark plate 33, for example, when rotor 1 upwards displacement 0.5mm, drive the vertical 5mm of displacement downwards of marker, the effect of enlargeing has the axial displacement to rotor 1, make it to be convenient for observe the axial displacement condition of rotor 1.

Referring to fig. 1 and 2, in the present embodiment, the marker is a marker pen 34, and the marker pen 34 may be a ball gel pen, and in other embodiments, the marker may be a sponge block or the like filled with ink and having a marking effect; the marking plate 33 is provided with a camera unit, the camera unit comprises a first camera 35, the first camera 35 is in signal connection with the maintenance module 7, and the first camera 35 acquires marking information of the marking pen 34 on the marking plate 33.

Referring to fig. 1 and 2, a plurality of groups of button switches are arranged on the marking plate 33, the number of the button switches is four, the button switches are electrically connected with the alarm module 6, the four button switches are respectively installed on the upper side and the lower side of the marking plate 33, the four button switches are respectively a first button switch 81, a second button switch 82, a third button switch 83 and a fourth button switch 84, the first button switch 81 and the second button switch 82 are respectively located on the upper side of the marking plate 33, the third button switch 83 and the fourth button switch 84 are respectively located on the lower side of the marking plate 33, the distance between the first button switch 81 and the third button switch 83 and the upper end of the bracket 32 is 9mm, and the distance between the second button switch 82 and the fourth button switch 84 and the upper end of the bracket 32 is 10 mm; when the axial displacement of the rotor 1 is 0.9mm, the first button switch 81 or the third button switch 83 is triggered by the marking pen 34 to trigger the alarm module 6 to perform primary alarm, when the axial displacement of the rotor 1 is 1mm, the second button switch 82 or the fourth button switch 84 is triggered by the marking pen 34 to trigger the alarm module 6 to perform secondary alarm, the primary alarm plays a role in warning workers, and the secondary alarm needs the workers to immediately stop the rotor 1 for maintenance.

Referring to fig. 1 and 2, the oil temperature detection module 4 includes a temperature sensor 41, the temperature sensor 41 is disposed in the oil sump 11, a counter 42 is disposed on the temperature sensor 41, the counter 42 is connected with a controller 43, the controller 43 may be a CPU, a single chip or other chip having a counting function and a control function, the controller 43 is in signal connection with the alarm module 6, when the temperature sensor 41 detects that the oil temperature of the cooling oil in the oil sump 11 exceeds 50 degrees celsius, the counter 42 counts, when the number of times exceeds three times, the start controller 43 sends a signal to the alarm module 6, and the alarm module 6 gives an alarm to remind a worker to stop to replace the cooling oil in the oil sump 11.

Referring to fig. 1 and 2, the cooling oil detection module 5 includes a magnifier 51 and a second camera 52, the oil tank 11 is made of a transparent material, and the cooling oil in the oil tank 11 can be observed through the outside of the oil tank 11; magnifying glass 51 sets up in oil groove 11 outsidely, and second camera 52 and display 71 signal connection, and second camera 52 sets up and is used for acquireing the image information of the cooling oil after magnifying through magnifying glass 51 in oil groove 11 position department, and when the staff learns the purity of cooling oil lower according to display 71, the cooling oil needs in time to be changed.

Referring to fig. 1 and 2, the alarm module 6 includes a plurality of sound and light prompt units 61, the sound and light prompt units 61 include speakers and flashlights connected in parallel, the speakers and flashlights are set into five groups, four groups of the speakers and flashlights are respectively connected with four groups of button switches in a corresponding signal manner, the other group of the speakers and flashlights is connected with the controller 43 in a signal manner, and when the controller 43 or any button switch is started, the speakers and flashlights can be controlled to be started simultaneously to give sound and light alarms.

Referring to fig. 1 and 2, the service module 7 includes a display 71, the first camera 35 acquires marking information of the marking pen 34 on the marking plate 33 and transmits the marking information to the display 71, and a worker monitors axial displacement information of the rotor 1 by observing the display 71.

Referring to fig. 1 and 2, the overhaul module 7 further includes a first database 72 and a second database 73 both connected to the alarm module 6, the first database 72 stores therein the number of maintenance workers corresponding to the longest downtime of the rotor 1, the second database 73 stores therein names of all the maintenance workers and corresponding work information, wherein the first database 72 is connected to the external console, acquires the longest downtime of the rotor 1 in the current state from the external console, it is determined from the maximum downtime of the rotor 1 how many maintenance personnel are needed to collaborate for maintenance, for example, if there is a standby generator set currently, the maximum downtime is 2h, two persons are needed to cooperatively maintain, if no standby generator set exists currently, the generator set is required to recover the power generation operation as soon as possible, the maximum shutdown time is 0.5h, and eight persons are required to cooperatively maintain.

The implementation principle of the detection device for the axial displacement of the water turbine generator set is as follows: in the normal rotation process of the rotor 1, when the rotor 1 axially displaces, the detection plate 31 is driven to vertically turn, the detection plate 31 drives the marking pen 34 to mark on the marking plate 33, the display 71 acquires a marking image through the first camera 35 to monitor the axial displacement condition of the rotor 1, and meanwhile, the display 71 can also acquire the purity of the cooling oil through the second camera 52; when the oil temperature exceeds 50 ℃ for three times continuously, the loudspeaker and the flash lamp give an alarm, the marking pen 34 gives an alarm by touching different button switches, and when maintenance is needed, a proper number of maintenance personnel are selected according to the longest downtime.

The embodiment of the application discloses a method for detecting axial displacement of a hydroelectric generating set. Includes steps S100 to S200.

Referring to fig. 3, in step S100, the oil temperature between the thrust disk 9 and the thrust pad 10 is acquired, the displacement of the detection plate 31 is acquired, and the purity of the cooling oil between the thrust disk 9 and the thrust pad 10 is acquired.

The oil temperature is obtained by a temperature sensor 41 arranged on the oil tank 11, the displacement condition of the detection plate 31 is judged by the axial displacement condition of the rotor 1 through the marks made on the marking plate 33 by the marking pen 34, and the purity of the cooling oil is obtained by the image of the cooling oil shot by a second camera 52 arranged outside the oil tank 11.

Referring to fig. 3, in step S200, if the oil temperature is higher than the preset value, the times higher than the preset value are counted, an alarm is activated when the times exceed the preset value, and a suitable maintenance person is selected to replace the cooling oil.

When the temperature sensor 41 detects that the temperature of the cooling oil in the oil tank 11 exceeds 50 ℃, the counter 42 counts, and when the number of times exceeds three, an alarm is given to remind a worker to stop the machine and replace the cooling oil in the oil tank 11.

If the displacement of the detection plate 31 exceeds a preset value, an alarm is started, and a proper maintenance worker is selected to overhaul the rotor 1.

When the axial displacement of the rotor 1 is 0.9mm, the first button switch 81 or the third button switch 83 is triggered by the marking pen 34 to trigger the alarm module 6 to perform primary alarm, when the axial displacement of the rotor 1 is 1mm, the second button switch 82 or the fourth button switch 84 is triggered by the marking pen 34 to trigger the alarm module 6 to perform secondary alarm, the primary alarm plays a role in warning workers, and the secondary alarm needs the workers to immediately stop the rotor 1 for maintenance.

And if the purity of the cooling oil is lower than a preset value, notifying maintenance personnel to replace the cooling oil.

The second camera 52 is arranged at the oil groove 11 and used for acquiring image information of the cooling oil amplified by the magnifier 51, and when the worker knows that the purity of the cooling oil is low according to the display 71, the preset value is referred to a working standard by related workers, and the cooling oil needs to be replaced in time.

Referring to FIG. 4, S200 further includes S210-S230.

In step S210, the longest downtime information of the rotor 1 is acquired.

The longest downtime is obtained through an external master console, the external master console generates the longest downtime information of the current situation through a scheduling center, and the longest downtime information is sent to a maintenance module through a port.

In step S220, the required number information of the maintenance workers is acquired from the first database 72 storing the number of the maintenance workers corresponding to the maximum downtime of the rotor 1, based on the maximum downtime information of the rotor 1, with the current maximum downtime information of the rotor 1 as an inquiry target.

For example, the first database 72 has a table of the number of maintenance workers corresponding to the longest downtime, two for 2h, four for 1h, and eight for 0.5h, … ….

In step S230, an appropriate number of service workers are screened and notified from the second database 73 in which the names of all the service workers and the corresponding work information are stored, with the number of the service workers as the query target.

For example, if the maximum downtime is 1 hour, four persons need to be selected from the second database 73, the screening mode may be random selection or four persons are selected in sequence according to the working age, and each maintenance worker is notified according to the working information of the maintenance worker, and the notification mode may be a mobile phone call or a short message prompt, or the worker is notified first and replaced by a forwarding mode.

The implementation principle of the detection method for the axial displacement of the hydroelectric generating set provided by the embodiment of the application is as follows: during the normal rotation of the rotor 1, the worker monitors the axial displacement of the rotor 1 by observing the marks on the mark plate 33 and the purity of the cooling oil through the display 71; when rotor 1 axial displacement appears 0.9mm, trigger alarm module 6 and report to the police one-level, when rotor 1 axial displacement appears 1mm, trigger alarm module 6 and report to the police two-level, one-level is reported to the police and is played the warning effect to the staff, the second grade is reported to the police and is needed the staff to shut down rotor 1 and overhaul immediately, when the oil temperature was in succession the cubic and is exceeded 50 degrees centigrade, speaker and flash light report to the police and indicate and change the coolant oil, when needing the maintenance, come to inform maintenance personal of corresponding quantity to come to accomplish the maintenance in the regulation time according to the longest downtime.

The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Claims (6)

1. The utility model provides a hydroelectric set axial displacement's detection device which characterized in that: the device comprises a displacement detection module (3), an oil temperature detection module (4), an alarm module (6) and an overhaul module (7), wherein the displacement detection module (3) is positioned on one side of a rotor (1) and used for detecting the axial displacement of the rotor (1), the oil temperature detection module (4) is used for detecting the oil temperature between a thrust pad (10) and a thrust disc (9), the displacement detection module (3) and the oil temperature detection module (4) are both connected to the alarm module (6), and the overhaul module (7) is connected with the alarm module (6) and used for overhauling the rotor (1);

the displacement detection module (3) comprises a detection plate (31) and a support (32), the support (32) is arranged on the ground, the detection plate (31) is hinged to the upper end of the support (32), the rotation axis of the detection plate (31) is horizontally arranged, the force arm of the detection plate (31) far away from the rotor (1) is larger than the force arm of the detection plate (31) close to the rotor (1), one end, close to the rotor (1), of the detection plate (31) is lapped on the upper surface of the rotor (1), a marking part is arranged on the other side of the support (32), a marking plate (33) is arranged on one side, far away from the rotor (1), of the detection plate (31), and a marking part for marking the marking plate (33) is arranged at one end, close to the marking plate (33), of the detection plate (31); the marking piece comprises a marking pen (34), the marking pen (34) is fixedly connected to one end, far away from the rotor (1), of the detection plate (31) and used for marking on the marking plate (33), a camera unit used for observing the marks is arranged on the marking plate (33), the camera unit is connected with the maintenance module (7), and the maintenance module (7) comprises a display (71) used for receiving camera information of the camera unit; the marking board (33) is provided with a plurality of groups of button switches, the button switches are arranged at different heights and are used for the marking pen (34) to shift, and the button switches are connected with the alarm module (6).

2. The detection device for the axial displacement of the hydroelectric generating set according to claim 1, characterized in that: the oil temperature detection module (4) comprises a temperature sensor (41), the temperature sensor (41) is arranged on the thrust pad (10) and used for detecting the oil temperature between the thrust disc (9) and the thrust pad (10), the alarm module (6) comprises a counter (42), and the counter (42) is in signal connection with the temperature sensor (41) and used for receiving information that the oil temperature exceeds a preset temperature and counting.

3. The detection device for the axial displacement of the hydroelectric generating set according to claim 1, characterized in that: the alarm module (6) comprises a plurality of sound and light prompt units (61), the sound and light prompt units (61) are respectively connected with the button switches and give sound and light alarms, and the sound and light prompt units (61) are simultaneously connected with the counter (42) and used for receiving counting information of the counter (42) exceeding preset times.

4. A method for detecting axial displacement of a hydroelectric generating set is characterized in that: the detection device for the axial displacement of the hydroelectric generating set according to any one of the claims 1 to 3 comprises:

acquiring the oil temperature between the thrust disc (9) and the thrust shoe (10) and acquiring the displacement of the detection plate (31);

if the oil temperature is higher than the preset value, accumulating the times higher than the preset value, starting an alarm when the accumulated times exceed the preset value, and selecting proper maintenance personnel to replace the cooling oil;

and if the displacement of the detection plate (31) exceeds a preset value, starting an alarm, and selecting a proper maintenance worker to overhaul the rotor (1).

5. The method for detecting the axial displacement of the hydroelectric generating set according to claim 4, wherein the method comprises the following steps: obtaining the longest downtime information of the rotor (1);

based on the longest downtime information of the rotor (1), acquiring the number information of required maintenance personnel by taking the current longest downtime information of the rotor (1) as an inquiry object from a first database (72) which stores the number of maintenance workers corresponding to the longest downtime of the rotor (1);

the appropriate number of maintenance personnel are screened and notified by using the number of maintenance personnel as an inquiry target from a second database (73) in which the names of all maintenance personnel and corresponding work information are stored.

6. The method for detecting the axial displacement of the hydroelectric generating set according to claim 4, wherein the method comprises the following steps: the steps which are carried out synchronously with the acquisition of the oil temperature information between the thrust disc (9) and the thrust pad (10) are as follows:

acquiring the purity of cooling oil between the thrust disc (9) and the thrust pad (10);

and if the purity of the cooling oil is lower than a preset value, notifying maintenance personnel to replace the cooling oil.

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