CN115900604B - Semi-automatic measuring system for stator and rotor air gap digital display of hydroelectric generating set - Google Patents
Semi-automatic measuring system for stator and rotor air gap digital display of hydroelectric generating set Download PDFInfo
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Abstract
The invention relates to the technical field of hydroelectric generation, in particular to a digital display semi-automatic measuring system for the gap between a stator and a rotor of a hydroelectric generating set, which comprises an image acquisition unit, a display unit and a display unit, wherein the image acquisition unit is respectively connected with a thermal imaging device and an ultrasonic imaging device and is used for acquiring a heating distribution image and an ultrasonic image of the gap between the stator and the rotor of the hydroelectric generating set; the image analysis unit is connected with the image acquisition unit and used for analyzing each image acquired by the image acquisition unit; the data processing unit is connected with the image analysis unit and is used for determining the air gap between the stator and the rotor of the hydroelectric generating set and the temperature data of the stator and the rotor according to the analysis result of the image analysis unit, and generating the adjustment data of the measurement scheme according to the temperature data of the stator and the rotor, so that the real-time measurement of the air gap of the hydroelectric generating set in the operation process is realized, and the safe operation of the hydroelectric generating set is ensured.
Description
Technical Field
The invention relates to the technical field of hydroelectric generation, in particular to a digital display semi-automatic measuring system for air gaps between a stator and a rotor of a hydroelectric generating set.
Background
At present, most of the domestic hydroelectric generating sets in China have the problem that the actually measured air gap is smaller than the designed air gap in the running process. The unbalanced magnetic tension changes due to uneven air gaps, the vibration value of the unit becomes large, and the safe and stable operation of the unit is affected, so that the water turbine generator unit is additionally important to measure the air gaps and monitor the temperature change of the stator and the rotor in the operation process.
Chinese patent publication No.: CN213812073U discloses a pneumatic frame gyro rotor axial gap quick measuring device, the gap quick measuring device is provided with: base, fixture, slip counter weight, digital display amesdial, reversing mechanism, through fixture with inner ring subassembly location, slip counter weight and rotor subassembly fixed position, digital amesdial is in slip counter weight top location return to zero, make measurement and fixture reverse 180 through reversing mechanism to measure the axial clearance of rotor, the device mainly used quantifies rotor axial clearance, solves the instability through the gap of feeling at present, reduces the dispersion scope of its parameter, thereby improves gyroscope working property and stability.
Therefore, the pneumatic frame gyro rotor axial gap quick measuring device has the problem that the pneumatic frame gyro rotor axial gap quick measuring device is not suitable for measuring the air gap of the running hydroelectric generating set.
Disclosure of Invention
Therefore, the invention provides a digital display semi-automatic measuring system for the stator and rotor air gap of the hydroelectric generating set. The air gap measuring system for the hydro-generator set overcomes the problem that the prior art is not suitable for measuring the air gap of the hydro-generator set in operation.
In order to achieve the above purpose, the invention provides a hydroelectric generating set stator-rotor air gap digital display semi-automatic measurement system, comprising:
the measuring mechanism comprises a first telescopic mechanism arranged at one side of the hydroelectric generating set, a second telescopic mechanism arranged on the first telescopic mechanism and a measuring device bracket connected with one end of the second telescopic mechanism far away from the first telescopic mechanism and used for installing a measuring device;
the measuring device comprises a thermal imaging device used for acquiring a thermal distribution image of the gap measuring position of the stator and the rotor of the hydroelectric generating set and an ultrasonic imaging device used for acquiring an ultrasonic image of the gap measuring position of the stator and the rotor of the hydroelectric generating set;
the air gap measurement processing module comprises a parameter storage unit used for storing measurement parameter information, an image acquisition unit used for acquiring the thermal distribution image and the ultrasonic image and connected with the parameter storage unit, the thermal imaging device and the ultrasonic imaging device respectively, an image analysis unit connected with the image acquisition unit and used for analyzing each image acquired by the image acquisition unit, and a data processing unit connected with the parameter storage unit and the image analysis unit and used for determining temperature data of a stator air gap and a rotor air gap and a stator rotor of the hydroelectric generating set according to an analysis result of the image analysis unit respectively and adjusting the measurement parameter information according to the temperature data of the stator and the rotor;
the air gap measurement processing module also comprises a data acquisition unit which is connected with the parameter storage unit and used for receiving the operation parameter information of the hydroelectric generating set input by an operator, wherein the operation parameter information comprises the rated voltage and the rated rotating speed of the hydroelectric generating set, the data processing unit calculates the time interval determination parameter G1 of the measurement scheme according to each parameter information,
wherein U1 represents the working voltage of the hydroelectric generating set, U10 represents the rated voltage, qu represents the influence weight of the working voltage of the hydroelectric generating set on the time interval determination parameter, R1 represents the current rotating speed of the hydroelectric generating set, R10 represents the rated rotating speed, and qr represents the influence weight of the working rotating speed of the hydroelectric generating set on the time interval determination parameter.
Further, the air gap measurement processing module also comprises a data display unit which is connected with the data processing unit and used for displaying measurement parameter information, wherein the measurement parameter information comprises a measurement time interval, the data processing unit determines the measurement time interval according to the comparison result of the time interval determination parameter and the preset time interval comparison parameter,
the data processing unit is provided with a first preset time interval comparison parameter Ga1, a second preset time interval comparison parameter Ga2, a first measurement time interval T1, a second measurement time interval T2 and a third measurement time interval T3, wherein Ga1 is less than Ga2, and T1 is more than T2 is more than T3;
if G1 is less than Ga1, the data processing unit determines that the measurement time interval is T1;
if Ga1 is less than or equal to G1 and less than Ga2, the data processing unit determines that the measurement time interval is T2;
if Ga2 is less than or equal to G1, the data processing unit determines that the measurement time interval is T3;
when the data processing unit determines that the measurement time interval is Ti, the data processing unit transmits the measurement time interval to the data display unit for display, and i=1, 2 and 3.
Further, the operation parameter information also comprises rated runaway rotation speed of the water-turbine generator set, the data processing unit is also used for calculating an early warning temperature determination parameter G2 of the measurement scheme according to the following formula,
wherein L10 is rated runaway speed, q L represents the influence weight of runaway speed of the hydroelectric generating set on the early warning temperature determination parameter, T10 represents a preset measurement time interval, qt represents the influence weight of the measurement time interval on the early warning temperature determination parameter.
Further, the measurement parameter information also comprises an early warning temperature, the data processing unit is also used for determining the early warning temperature according to the comparison result of the early warning temperature determination parameter and the preset early warning temperature comparison parameter,
the data processing unit is provided with a first preset early warning temperature comparison parameter Gb1 of an early warning temperature determination parameter, a second preset early warning temperature comparison parameter Gb2 of the early warning temperature determination parameter, a first early warning temperature C1, a second early warning temperature C2 and a third early warning temperature C3, wherein Gb1 is smaller than Gb2, and C1 is smaller than C2 and smaller than C3;
if G2 is smaller than Gb1, the data processing unit determines that the early warning temperature is C1;
if Gb1 is less than or equal to G2 and less than Gb2, the data processing unit determines that the early warning temperature is C2;
if Gb2 is less than or equal to G2, the data processing unit determines that the early warning temperature is C3;
when the data processing unit determines that the early warning temperature is Cj, the data processing unit transmits the early warning temperature to the data display unit for display, and j=1, 2 and 3.
Further, the measuring mechanism further comprises an execution control unit which is respectively connected with the first telescopic mechanism, the second telescopic mechanism and the track driving device, an operator adjusts the measuring position of the stator and rotor air gap according to the data displayed by the data display unit, when the stator and rotor air gap of the hydroelectric generating set is measured, the image acquisition unit acquires the heat distribution image, the image analysis unit acquires a pixel value P of a high-temperature area according to the image, the data processing unit determines whether the measuring position of the stator and rotor air gap needs to be adjusted according to the comparison result of the pixel value P of the high-temperature area and a preset pixel,
the data processing unit is provided with a first preset pixel value P1 and a second preset pixel value P2, wherein P1 is smaller than P2;
if P is less than P1 or P is more than P2, the data processing unit determines that the measuring position of the stator and rotor air gap needs to be adjusted, and transmits temperature data corresponding to the pixel value P of the high-temperature area and measuring position data corresponding to the hydroelectric generating set to the data display unit for display, and an operator adjusts the measuring position of the stator and rotor air gap according to the measuring position data;
if P1 is less than or equal to P2, the data processing unit determines that the measuring position of the stator and rotor air gap does not need to be adjusted.
Further, the image analysis unit is further configured to obtain a pixel area S of the air gap between the stator and the rotor according to the thermal distribution image, the data processing unit determines whether to adjust the early warning temperature according to a result of the pixel area S and a preset pixel area,
the data processing unit is provided with a first preset pixel area S1 and a second preset pixel area S2, wherein S1 is smaller than S2;
if S is less than S1, the data processing unit determines that the early warning temperature is not regulated;
and if S1 is more than or equal to S2, the data processing unit determines to adjust the early warning temperature.
Further, the image acquisition unit acquires the ultrasonic image, the image analysis unit acquires the stator-rotor air gap H according to the image, the data processing unit adjusts the early warning temperature according to the comparison result of the stator-rotor air gap H and a preset stator-rotor air gap,
the data processing unit is provided with a first preset rotor air gap H1, a second preset rotor air gap H2, a first early warning temperature adjustment coefficient Kc1 and a second early warning temperature adjustment coefficient Kc2, wherein H1 is smaller than H2, and 0.5 is smaller than Kc1 and smaller than Kc2;
if H is less than H1, the data processing unit determines that the early warning temperature is not regulated;
if H1 is less than or equal to H2, the data processing unit determines an early warning temperature adjustment coefficient kc1;
if H2 is less than or equal to H, the data processing unit determines an early warning temperature adjustment coefficient kc2;
and if the data processing unit determines that the x-th early warning temperature adjustment coefficient Kcx is adopted to adjust the early warning temperature, the adjusted early warning temperature is marked as C4, and C4=cj×Kcx and x=1, 2 are set.
Further, the data acquisition unit is also used for acquiring the rotor rotating speed Q of the hydroelectric generating set in real time, the data processing unit calculates a time interval adjustment parameter G3 of a measurement scheme according to the following formula,
where r represents a centrifugal radius and F10 represents a preset centrifugal force.
Further, the data processing unit is further configured to adjust the measurement time interval according to a comparison result between the time interval adjustment parameter G3 and a preset time interval adjustment parameter,
the data processing unit is provided with a first preset time interval adjustment parameter Gc1, a second preset time interval adjustment parameter Gc2, a first time interval adjustment coefficient Kt1 and a second time interval adjustment coefficient Kt2, wherein Gc1 is smaller than Gc2, and 1 is larger than Kt1 and larger than Kt2 and larger than 0.5;
if G3 is less than Gc1, the data processing unit determines that the measurement time interval is not adjusted;
if Gc1 is less than or equal to G3 and less than Gc2, the data processing unit determines that the time interval adjustment coefficient is Kt1;
if Gc2 is less than or equal to G3, the data processing unit determines that the time interval adjustment coefficient is Kt2;
if the data processing unit determines that the y-th time interval adjustment coefficient Kty is used to adjust the measurement time interval, the adjusted measurement time interval is denoted as T4, and t4=tiχ Kty is set.
Compared with the prior art, the method has the beneficial effects that the data processing unit determines the air gap between the stator and the rotor of the hydroelectric generating set and the temperature data of the stator and the rotor through the analysis result of the image analysis unit, and generates the adjustment suggestion information of the measurement scheme according to the temperature data of the stator and the rotor, so that the real-time measurement of the air gap of the hydroelectric generating set in the operation process is realized, and the safe operation of the hydroelectric generating set is ensured.
Further, the data processing unit calculates a time interval determination parameter of the measurement scheme according to each parameter information, and when the calculation of the time interval determination parameter is completed, the data processing unit determines a measurement time interval according to a comparison result of the time interval determination parameter and a preset time interval comparison parameter, so that the accuracy of the air gap measurement interval is ensured, the timeliness of the air gap measurement time is improved, and the safe operation of the hydroelectric generating set is ensured.
Further, when the measurement time interval is determined, the data processing unit calculates an early warning temperature determination parameter of a measurement scheme according to the following formula, and determines the early warning temperature according to a comparison result of the early warning temperature determination parameter and a preset early warning temperature comparison parameter, so that the accuracy of judging the air gap early warning temperature is improved, the timeliness of air gap measurement is further improved, and the safe operation of the hydroelectric generating set is ensured.
Further, when measuring the stator and rotor air gap of the hydroelectric generating set, the image acquisition unit acquires the heated distribution image, the image analysis unit acquires the pixel value of the high-temperature area according to the image, and the data processing unit determines whether the stator and rotor air gap measurement position needs to be adjusted according to the comparison result of the pixel value of the high-temperature area and a preset pixel, so that the accuracy of judging whether the air gap early warning temperature is adjusted is improved, and the safe operation of the hydroelectric generating set is ensured.
Further, when the stator and rotor air gap is measured, the image analysis unit is further used for obtaining the pixel area of the stator and rotor air gap according to the heated distribution image, and the data processing unit determines whether the early warning temperature is adjusted according to the result of the pixel area and the preset pixel area, so that the accuracy of judging whether the air gap early warning temperature is adjusted is further improved, and the safe operation of the hydroelectric generating set is guaranteed.
Further, when the data processing unit determines to adjust the early warning temperature, the image acquisition unit acquires the ultrasonic image, and the image analysis unit ensures the accuracy of measuring the stator-rotor air gap by acquiring the stator-rotor air gap according to the image.
Further, the data processing unit adjusts the early warning temperature according to the comparison result of the stator-rotor air gap and the preset stator-rotor air gap, so that the accuracy of judging the air gap early warning temperature is further improved, and the safe operation of the hydroelectric generating set is ensured.
Further, the data acquisition unit is further used for acquiring the rotor rotating speed of the hydroelectric generating set in real time, the data processing unit calculates a time interval adjustment parameter of a measurement scheme according to the following formula, and the data processing unit adjusts the measurement time interval according to a comparison result of the time interval adjustment parameter and a preset time interval adjustment parameter, so that the accuracy of determining the air gap measurement interval is further improved, the timeliness of the air gap measurement time is improved, and the safe operation of the hydroelectric generating set is guaranteed.
Drawings
FIG. 1 is a schematic hardware structure diagram of a digital display semi-automatic measuring system for stator and rotor air gaps of a hydroelectric generating set;
FIG. 2 is a schematic diagram of the connection relation of the digital display semi-automatic measuring system for the stator and rotor air gap of the hydroelectric generating set;
FIG. 3 is a schematic diagram of the connection relation of the execution control unit of the stator and rotor air gap digital display semi-automatic measurement system of the hydroelectric generating set;
in each figure, a 1-first telescopic mechanism, a 2-thermal imaging device, a 3-second telescopic mechanism, a 4-track driving device, a 5-measuring device bracket and a 6-ultrasonic imaging device are arranged.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1-3, fig. 1 is a schematic hardware structure diagram of a digital display semi-automatic measuring system for stator and rotor air gaps of a hydroelectric generating set according to an embodiment of the invention; FIG. 2 is a schematic diagram of a connection relationship of a digital display semi-automatic measuring system for stator and rotor air gaps of a hydroelectric generating set according to an embodiment of the invention; fig. 3 is a schematic diagram of connection relation of an execution control unit of the stator-rotor air gap digital display semiautomatic measurement system of the hydro-generator set according to an embodiment of the invention.
The invention provides a hydroelectric generating set stator and rotor air gap digital display semi-automatic measurement system, which comprises:
the measuring mechanism comprises a first telescopic mechanism 1 arranged at one side of the hydroelectric generating set, a second telescopic mechanism 3 arranged on the first telescopic mechanism 1 and a measuring device bracket 5 which is connected with one end of the second telescopic mechanism 3 far away from the first telescopic mechanism 1 and used for installing a measuring device;
the measuring device comprises a thermal imaging device 2 for acquiring a thermal distribution image of the gap measuring position of the stator and the rotor of the hydroelectric generating set and an ultrasonic imaging device 6 for acquiring an ultrasonic image of the gap measuring position of the stator and the rotor of the hydroelectric generating set;
the air gap measurement processing module comprises a parameter storage unit used for storing measurement parameter information, an image acquisition unit used for acquiring a thermal distribution image and an ultrasonic image and respectively connected with the parameter storage unit, the thermal imaging device and the ultrasonic imaging device, an image analysis unit connected with the image acquisition unit and used for analyzing each image acquired by the image acquisition unit, and a data processing unit respectively connected with the parameter storage unit and the image analysis unit and used for determining the air gap between a stator and a rotor and the temperature data of the stator and the rotor of the hydroelectric generating set according to the analysis result of the image analysis unit and adjusting the measurement parameter information according to the temperature data of the stator and the rotor.
Specifically, the measuring device bracket 5 is arc-shaped, the track driving device 4 is arranged on the inner side of the arc, and the track driving device 4 is in driving connection with the measuring device, so that the measuring device can move along with the arc track of the measuring device bracket.
Specifically, the first telescopic mechanism 1 and the second telescopic mechanism 3 may be selected as multi-stroke cylinders;
specifically, the thermal imaging device 2 may be selected as a thermal imager, and the ultrasonic imaging device 6 may be selected as an ultrasonic imager.
Specifically, the air gap measurement processing module also comprises a data acquisition unit which is connected with the parameter storage unit and used for receiving the operation parameter information of the hydroelectric generating set input by an operator, wherein the operation parameter information comprises the rated voltage and the rated rotating speed of the hydroelectric generating set, the data processing unit calculates the time interval determination parameter G1 of the measurement scheme according to each parameter information,
wherein U1 represents the working voltage of the hydroelectric generating set, U10 represents the rated voltage, qu represents the influence weight of the working voltage of the hydroelectric generating set on the time interval determination parameter, R1 represents the current rotating speed of the hydroelectric generating set, R10 represents the rated rotating speed, and qr represents the influence weight of the working rotating speed of the hydroelectric generating set on the time interval determination parameter.
Specifically, the air gap measurement processing module also comprises a data display unit which is connected with the data processing unit and used for displaying measurement parameter information, wherein the measurement parameter information comprises a measurement time interval, the data processing unit determines the measurement time interval according to the comparison result of the time interval determination parameter and the preset time interval comparison parameter,
the data processing unit is provided with a first preset time interval comparison parameter Ga1, a second preset time interval comparison parameter Ga2, a first measurement time interval T1, a second measurement time interval T2 and a third measurement time interval T3, wherein Ga1 is less than Ga2, and T1 is more than T2 is more than T3;
if G1 is less than Ga1, the data processing unit determines that the measurement time interval is T1;
if Ga1 is less than or equal to G1 and less than Ga2, the data processing unit determines that the measurement time interval is T2;
if Ga2 is less than or equal to G1, the data processing unit determines that the measurement time interval is T3;
when the data processing unit determines that the measurement time interval is Ti, the data processing unit transmits the measurement time interval to the data display unit for display, i=1, 2,3.
In particular, the operation parameter information also comprises rated runaway rotation speed of the hydroelectric generating set, the data processing unit is also used for calculating an early warning temperature determination parameter G2 of the measurement scheme according to the following formula,
wherein L10 is rated runaway speed, q L represents the influence weight of runaway speed of the hydroelectric generating set on the early warning temperature determination parameter, T10 represents a preset measurement time interval, qt represents the influence weight of the measurement time interval on the early warning temperature determination parameter.
In particular, the measurement parameter information also comprises an early warning temperature, the data processing unit is also used for determining the early warning temperature according to the comparison result of the early warning temperature determination parameter and the preset early warning temperature comparison parameter,
the data processing unit is provided with a first preset early warning temperature comparison parameter Gb1 of the early warning temperature determination parameter, a second preset early warning temperature comparison parameter Gb2 of the early warning temperature determination parameter, a first early warning temperature C1, a second early warning temperature C2 and a third early warning temperature C3, wherein Gb1 is smaller than Gb2, and C1 is smaller than C2 and smaller than C3;
if G2 is smaller than Gb1, the data processing unit determines that the early warning temperature is C1;
if Gb1 is less than or equal to G2 and less than Gb2, the data processing unit determines that the early warning temperature is C2;
if Gb2 is less than or equal to G2, the data processing unit determines that the early warning temperature is C3;
when the data processing unit determines that the early warning temperature is Cj, the data processing unit transmits the early warning temperature to the data display unit for display, and j=1, 2 and 3.
Specifically, the measuring mechanism further comprises an execution control unit which is respectively connected with the first telescopic mechanism, the second telescopic mechanism and the track driving device, an operator adjusts the measuring position of the air gap between the stator and the rotor according to the data displayed by the data display unit, when the air gap between the stator and the rotor of the water turbine generator set is measured, the image acquisition unit acquires a heat distribution image, the image analysis unit acquires a pixel value P of a high temperature area according to the image, the data processing unit determines whether the measuring position of the air gap between the stator and the rotor needs to be adjusted according to the comparison result of the pixel value P of the high temperature area and a preset pixel,
the data processing unit is provided with a first preset pixel value P1 and a second preset pixel value P2, wherein P1 is smaller than P2;
if P is less than P1 or P is more than P2, the data processing unit determines that the measuring position of the air gap between the stator and the rotor needs to be adjusted, and transmits temperature data corresponding to the pixel value P of the high-temperature area and measuring position data corresponding to the hydroelectric generating set to the data display unit for display, and an operator adjusts the measuring position of the air gap between the stator and the rotor according to the measuring position data;
if P1 is more than or equal to P2, the data processing unit determines that the measuring position of the air gap of the stator and the rotor does not need to be adjusted.
Specifically, when the air gap measuring position of the stator and the rotor needs to be adjusted, the data display unit displays the temperature distribution of the pixel positions of the thermal distribution image corresponding to each position of the hydroelectric generating set, an operator adjusts the height of the measuring device through the first telescopic mechanism 1 controlled by the execution control unit according to the thermal distribution image of each position of the hydroelectric generating set, adjusts the horizontal measuring position of the measuring device through the second telescopic mechanism 3, and adjusts the transverse radian measuring position of the measuring device through the track driving device 4 arranged on the inner side of the circular arc of the measuring device bracket 5, so that the aim of accurately adjusting the measuring position is fulfilled.
Specifically, an alternative is to operate the execution control unit to perform adjustment of the measurement position of the measuring mechanism to the measuring device in a button control manner.
Specifically, the image analysis unit is also used for obtaining the pixel area S of the stator and rotor air gap according to the thermal distribution image, the data processing unit determines whether to adjust the early warning temperature according to the result of the pixel area S and the preset pixel area,
the data processing unit is provided with a first preset pixel area S1 and a second preset pixel area S2, wherein S1 is smaller than S2;
if S is less than S1, the data processing unit determines that the early warning temperature is not regulated;
if S1 is not less than S2, the data processing unit determines to adjust the early warning temperature.
Specifically, the image acquisition unit acquires an ultrasonic image, the image analysis unit acquires a stator-rotor air gap H according to the image, the data processing unit adjusts the early warning temperature according to the comparison result of the stator-rotor air gap H and a preset stator-rotor air gap,
the data processing unit is provided with a first preset rotor air gap H1, a second preset rotor air gap H2, a first early warning temperature adjustment coefficient Kc1 and a second early warning temperature adjustment coefficient Kc2, wherein H1 is more than H2, and 0.5 is more than Kc1 and less than Kc2 is more than 1;
if H is less than H1, the data processing unit determines that the early warning temperature is not regulated;
if H1 is less than or equal to H2, the data processing unit determines an early warning temperature adjustment coefficient kc1;
if H2 is less than or equal to H, the data processing unit determines an early warning temperature adjustment coefficient kc2;
if the data processing unit determines that the x-th early warning temperature adjustment coefficient Kcx is adopted to adjust the early warning temperature, the adjusted early warning temperature is recorded as C4, and C4=cj×kcx, and x=1, 2 are set.
Specifically, the data acquisition unit is also used for acquiring the rotor rotating speed Q of the water turbine generator set in real time, the data processing unit calculates the time interval adjustment parameter G3 of the measurement scheme according to the following formula,
where r represents a centrifugal radius and F10 represents a preset centrifugal force.
Specifically, the data processing unit is further configured to adjust the measurement time interval according to a comparison result between the time interval adjustment parameter G3 and the preset time interval adjustment parameter,
the data processing unit is provided with a first preset time interval adjustment parameter Gc1, a second preset time interval adjustment parameter Gc2, a first time interval adjustment coefficient Kt1 and a second time interval adjustment coefficient Kt2, wherein Gc1 is smaller than Gc2, and 1 is larger than Kt1 and larger than Kt2 and larger than 0.5;
if G3 is less than Gc1, the data processing unit determines that the measurement time interval is not adjusted;
if Gc1 is less than or equal to G3 and less than Gc2, the data processing unit determines that the time interval adjustment coefficient is Kt1;
if Gc2 is less than or equal to G3, the data processing unit determines that the time interval adjustment coefficient is Kt2;
if the data processing unit determines that the measurement time interval is adjusted by the y-th time interval adjustment coefficient Kty, the adjusted measurement time interval is denoted as T4, and t4=ti× Kty is set.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A hydroelectric set stator and rotor air gap digital display semi-automatic measurement system comprises:
the measuring mechanism comprises a first telescopic mechanism arranged at one side of the hydroelectric generating set, a second telescopic mechanism arranged on the first telescopic mechanism and a measuring device bracket connected with one end of the second telescopic mechanism far away from the first telescopic mechanism and used for installing a measuring device;
the measuring device comprises a thermal imaging device used for acquiring a thermal distribution image of the gap measuring position of the stator and the rotor of the hydroelectric generating set and an ultrasonic imaging device used for acquiring an ultrasonic image of the gap measuring position of the stator and the rotor of the hydroelectric generating set;
the air gap measurement processing module comprises a parameter storage unit used for storing measurement parameter information, an image acquisition unit used for acquiring the thermal distribution image and the ultrasonic image and connected with the parameter storage unit, the thermal imaging device and the ultrasonic imaging device respectively, an image analysis unit connected with the image acquisition unit and used for analyzing each image acquired by the image acquisition unit, and a data processing unit connected with the parameter storage unit and the image analysis unit and used for determining temperature data of a stator air gap and a rotor air gap and a stator rotor of the hydroelectric generating set according to an analysis result of the image analysis unit respectively and adjusting the measurement parameter information according to the temperature data of the stator and the rotor;
the air gap measurement processing module also comprises a data acquisition unit which is connected with the parameter storage unit and used for receiving the operation parameter information of the hydroelectric generating set input by an operator, wherein the operation parameter information comprises the rated voltage and the rated rotating speed of the hydroelectric generating set, the data processing unit calculates the time interval determination parameter G1 of the measurement scheme according to each parameter information,
wherein U1 represents the working voltage of the hydroelectric generating set, U10 represents the rated voltage, qu represents the influence weight of the working voltage of the hydroelectric generating set on the time interval determination parameter, R1 represents the current rotating speed of the hydroelectric generating set, R10 represents the rated rotating speed, and qr represents the influence weight of the working rotating speed of the hydroelectric generating set on the time interval determination parameter.
2. The digital display semiautomatic measuring system for air gap between stator and rotor of hydroelectric generating set according to claim 1, wherein the air gap measuring processing module further comprises a data display unit connected with the data processing unit for displaying measurement parameter information, the measurement parameter information comprises measurement time interval, the data processing unit determines measurement time interval according to the comparison result of the time interval determination parameter and the preset time interval comparison parameter,
the data processing unit is provided with a first preset time interval comparison parameter Ga1, a second preset time interval comparison parameter Ga2, a first measurement time interval T1, a second measurement time interval T2 and a third measurement time interval T3, wherein Ga1 is less than Ga2, and T1 is more than T2 is more than T3;
if G1 is less than Ga1, the data processing unit determines that the measurement time interval is T1;
if Ga1 is less than or equal to G1 and less than Ga2, the data processing unit determines that the measurement time interval is T2;
if Ga2 is less than or equal to G1, the data processing unit determines that the measurement time interval is T3;
when the data processing unit determines that the measurement time interval is Ti, the data processing unit transmits the measurement time interval to the data display unit for display, and i=1, 2 and 3.
3. The semi-automatic measuring system of the stator and rotor air gap digital display of the hydro-generator set according to claim 2, wherein the operation parameter information further comprises rated runaway rotation speed of the hydro-generator set, the data processing unit is further used for calculating the early warning temperature determination parameter G2 of the measuring scheme according to the following formula,
wherein L10 is rated runaway speed, ql represents the influence weight of runaway speed of the hydroelectric generating set on the early warning temperature determination parameter, T10 represents a preset measurement time interval, and qt represents the influence weight of the measurement time interval on the early warning temperature determination parameter.
4. The digital display semiautomatic measurement system for air gap between stator and rotor of hydroelectric generating set according to claim 3, wherein the measurement parameter information further comprises an early warning temperature, the data processing unit is further configured to determine the early warning temperature according to the comparison result between the early warning temperature determination parameter and the preset early warning temperature comparison parameter,
the data processing unit is provided with a first preset early warning temperature comparison parameter Gb1 of an early warning temperature determination parameter, a second preset early warning temperature comparison parameter Gb2 of the early warning temperature determination parameter, a first early warning temperature C1, a second early warning temperature C2 and a third early warning temperature C3, wherein Gb1 is smaller than Gb2, and C1 is smaller than C2 and smaller than C3;
if G2 is smaller than Gb1, the data processing unit determines that the early warning temperature is C1;
if Gb1 is less than or equal to G2 and less than Gb2, the data processing unit determines that the early warning temperature is C2;
if Gb2 is less than or equal to G2, the data processing unit determines that the early warning temperature is C3;
when the data processing unit determines that the early warning temperature is Cj, the data processing unit transmits the early warning temperature to the data display unit for display, and j=1, 2 and 3.
5. The digital display semiautomatic measurement system of air gaps between stator and rotor of a hydroelectric generating set according to claim 4, wherein the measurement mechanism further comprises an execution control unit respectively connected with the first telescopic mechanism, the second telescopic mechanism and the track driving device, an operator adjusts the measurement position of the air gaps between stator and rotor according to the data displayed by the data display unit, the image acquisition unit acquires the heat distribution image when measuring the air gaps between stator and rotor of the hydroelectric generating set, the image analysis unit acquires the pixel value P of a high temperature area according to the image, the data processing unit determines whether the measurement position of the air gap between stator and rotor needs to be adjusted according to the comparison result of the pixel value P of the high temperature area and a preset pixel,
the data processing unit is provided with a first preset pixel value P1 and a second preset pixel value P2, wherein P1 is smaller than P2;
if P is less than P1 or P is more than P2, the data processing unit determines that the measuring position of the stator and rotor air gap needs to be adjusted, and transmits temperature data corresponding to the pixel value P of the high-temperature area and measuring position data corresponding to the hydroelectric generating set to the data display unit for display, and an operator adjusts the measuring position of the stator and rotor air gap according to the measuring position data;
if P1 is less than or equal to P2, the data processing unit determines that the measuring position of the stator and rotor air gap does not need to be adjusted.
6. The digital display semiautomatic measurement system of stator and rotor air gaps of a hydroelectric generating set according to claim 5, wherein the image analysis unit is further configured to obtain a pixel area S of the stator and rotor air gaps according to the thermal distribution image, the data processing unit determines whether to adjust the early warning temperature according to the result of the pixel area S and a preset pixel area,
the data processing unit is provided with a first preset pixel area S1 and a second preset pixel area S2, wherein S1 is smaller than S2;
if S is less than S1, the data processing unit determines that the early warning temperature is not regulated;
and if S1 is more than or equal to S2, the data processing unit determines to adjust the early warning temperature.
7. The digital display semiautomatic measurement system of air gaps between stator and rotor of a hydroelectric generating set according to claim 6, wherein the image acquisition unit acquires the ultrasonic image, the image analysis unit acquires the air gap H between stator and rotor according to the image, the data processing unit adjusts the pre-warning temperature according to the comparison result of the air gap H between stator and rotor and the preset air gap between stator and rotor,
the data processing unit is provided with a first preset rotor air gap H1, a second preset rotor air gap H2, a first early warning temperature adjustment coefficient Kc1 and a second early warning temperature adjustment coefficient Kc2, wherein H1 is smaller than H2, and 0.5 is smaller than Kc1 and smaller than Kc2;
if H is less than H1, the data processing unit determines that the early warning temperature is not regulated;
if H1 is less than or equal to H2, the data processing unit determines an early warning temperature adjustment coefficient kc1;
if H2 is less than or equal to H, the data processing unit determines an early warning temperature adjustment coefficient kc2;
and if the data processing unit determines that the x-th early warning temperature adjustment coefficient Kcx is adopted to adjust the early warning temperature, the adjusted early warning temperature is marked as C4, and C4=cj×Kcx and x=1, 2 are set.
8. The semi-automatic measuring system of stator and rotor air gap digital display of the hydroelectric generating set according to claim 7, wherein the data acquisition unit is further used for acquiring the rotor rotation speed Q of the hydroelectric generating set in real time, the data processing unit calculates the time interval adjustment parameter G3 of the measuring scheme according to the following formula,
where r represents a centrifugal radius and F10 represents a preset centrifugal force.
9. The semi-automatic measuring system of stator and rotor air gap digital display of a hydroelectric generating set according to claim 8, wherein the data processing unit is further configured to adjust the measuring time interval according to the comparison result between the time interval adjustment parameter G3 and a preset time interval adjustment parameter,
the data processing unit is provided with a first preset time interval adjustment parameter Gc1, a second preset time interval adjustment parameter Gc2, a first time interval adjustment coefficient Kt1 and a second time interval adjustment coefficient Kt2, wherein Gc1 is smaller than Gc2, and 1 is larger than Kt1 and larger than Kt2 and larger than 0.5;
if G3 is less than Gc1, the data processing unit determines that the measurement time interval is not adjusted;
if Gc1 is less than or equal to G3 and less than Gc2, the data processing unit determines that the time interval adjustment coefficient is Kt1;
if Gc2 is less than or equal to G3, the data processing unit determines that the time interval adjustment coefficient is Kt2;
if the data processing unit determines that the y-th time interval adjustment coefficient Kty is used to adjust the measurement time interval, the adjusted measurement time interval is denoted as T4, and t4=tiχ Kty is set.
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