Automatic vertical type hydroelectric generating set stator center measuring and adjusting system

Abstract

According to the automatic vertical type hydroelectric generating set stator center measuring and adjusting system provided by the invention, a software and hardware combination mode is adopted, and a combined design of three groups of distance rod frames, distance rods and sensors is adopted; a software algorithm of the stator center measurement and adjustment calculation system is combined to realize automatic measurement of the distance from the edge of the stator base of the hydroelectric generating set to the position of the piano wire, and data such as the offset angle and the offset distance of the stator center and the position of the piano wire are obtained through calculation, so that adjustment is facilitated; the technical problems that when stator center measurement and adjustment are carried out in hydroelectric generating set stator installation, a large amount of manpower and material resources are consumed, reading errors exist, the accuracy is low, and meanwhile accurate installation of the stator is further affected by shaking and deviation of the position of a piano wire due to the fact that a micrometer touches the piano wire are solved. The method has the beneficial effects of safe and simple operation and high precision.

Description

Technical Field

[0001] The invention belongs to the field of measurement and adjustment of the stator center of a hydroelectric generator set, and in particular relates to an automatic vertical hydroelectric generator set stator center measurement and adjustment system. Background Art

[0002] The line connecting the geometric centers of the fixed parts of a vertical hydroelectric unit is called the center line of the unit. During the expansion of the unit, by measuring the center of the unit, the roundness and concentricity of each fixed part of the unit can be understood. At the same time, by comparing the center measurement and adjustment data during the installation of the unit, the change of the center of the unit after long-term operation can be determined. In the prior art, the center measurement of a vertical hydroelectric generator unit is to adjust the rotating part of the unit to the center position of the unit during the installation or maintenance of the hydroelectric generator unit. Due to the huge size of the unit and the relatively high requirements for center measurement, the eight-point measurement method is often used. When the unit is being overhauled, the maintenance personnel often need to listen to the sound of the headphones until the "squeak" sound emitted by the headphones reaches the crispest, so that the center data of the fixed parts can be measured more accurately. This method of measuring the center data of fixed parts by listening to the sound of headphones requires very high skill levels and experience of the maintenance personnel, and the value needs to be determined by listening to the size of the sound with the ears.

[0003] This leads to greater subjectivity and measurement errors, and the measurement accuracy is not high. In view of this situation, maintenance personnel often have to measure and adjust the stator center many times before they can accurately adjust the stator position to the center. Not only is the operation complicated and takes up a lot of time, consuming a lot of manpower and material resources, but when the operator uses a micrometer to measure the stator center of the hydropower unit, it is necessary to repeatedly swing the micrometer at different positions to determine the center. There are errors in the reading, and the accuracy is low. In addition, since the micrometer needs to touch the piano wire, the position of the piano wire may be jittered and offset, further affecting the installation of the stator. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic vertical hydropower unit stator center measurement and adjustment system for solving the above-mentioned technical problems existing in the field of hydropower unit stator center measurement and adjustment.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic vertical hydroelectric unit stator center measurement and adjustment system, comprising a sensor detection module, a transmission control module, and a stator center measurement and adjustment calculation system, wherein the sensor detection module comprises a first laser distance sensor, a first angle sensor, a second laser distance sensor, a second angle sensor, a third laser distance sensor, and a third angle sensor, wherein the first laser distance sensor, the first angle sensor, the second laser distance sensor, the second angle sensor, the third laser distance sensor, and the third angle sensor are respectively connected to a 24V DC bus through a single-phase air switch;

[0006] The stator center measurement and adjustment calculation system includes a computer and a total transceiver control module, the computer is connected to a DC bus and powered by the DC bus, and the total transceiver control module is connected to a 10V DC bus and powered by the 10V DC bus;

[0007] The transmission control module includes a first control module, a second control module, and a third control module. The two ends of the first control module are respectively connected to the first laser ranging sensor, the first angle sensor, the first electric shaft, and the total transceiver control module. The two ends of the second control module are respectively connected to the second laser ranging sensor, the second angle sensor, the second electric shaft, and the total transceiver control module; the two ends of the third control module are respectively connected to the third laser ranging sensor, the third angle sensor, the third electric shaft, and the total transceiver control module; the first control module, the second control module, and the third control module all wirelessly transmit and receive signals to the sensor through a wireless transmission device and are respectively connected to the 10V DC bus through a single-phase air switch;

[0008] The stator center measurement and adjustment calculation system automatically measures and calculates the distance from the edge of the stator base of the hydropower unit to the piano wire, and automatically gives the data of the offset angle and offset distance between the stator center and the piano wire through the calculation of the stator center measurement and adjustment calculation system. The specific calculation algorithm of the stator center measurement and adjustment calculation system is as follows:

[0009]

[0010] In formula 1, l a is the converted length of the distance rod where the first laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance measuring sensor is located, mm; α is the vertical offset angle of the distance rod measured by the first angle sensor, °;

[0011]

[0012] In formula 2, l bis the converted length of the distance rod where the second laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance sensor is located, mm; β is the vertical offset angle of the distance rod measured by the first angle sensor, °;

[0013]

[0014] In formula 3, l c is the converted length of the distance rod where the third laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance sensor is located, mm; σ is the vertical offset angle of the distance rod measured by the first angle sensor, °;

[0015]

[0016] In formula 4, A is the angle between the first laser ranging sensor and the x-axis, °; b is the distance measured by the second laser ranging sensor, mm; b0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the end point of the rod near the center, mm; d is the thickness of the edge magnetic card plate, mm; R is the diameter of the stator base disk, mm; a is the distance measured by the first laser ranging sensor, mm; a0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the end point of the rod near the center, mm;

[0017]

[0018] In equations 5 and 6, x is the coordinate of the piano wire position in the x-axis direction in the coordinate system, °; y is the coordinate of the piano wire position in the y-axis direction in the coordinate system, °; c is the distance measured by the third laser ranging sensor, mm; c0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the center position to the end point of the rod, mm;

[0019] Get the specific coordinates (x, y) of the center point of the piano wire in the coordinate system with the stator center as the origin, then translate the stator by xmm along the positive direction of the x-axis, ymm along the positive direction of the y-axis, or when x is a negative value, translate it in the negative direction of the x-axis, when y is a negative value, translate it in the negative direction of the y-axis, so that the stator center can coincide with the point where the piano wire is located, thereby realizing the measurement and adjustment of the stator center.

[0020] Preferably, the working steps of the automatic vertical hydropower unit stator center measurement and adjustment system are as follows:

[0021] S1: Hang the stator into the corresponding position of the unit for center measurement and adjustment;

[0022] S2: Select two symmetrical points on the circle of the stator base (15), establish a rectangular coordinate system, take the line connecting the two symmetrical points as the x-axis, select a bisection point on the circle between the two symmetrical points, and take the direction of the line connecting the center of the circle to the bisection point as the positive direction of the y-axis;

[0023] The intersection of the positive axis of the x-axis and the circular edge of the stator base is taken as the fixed point of the first distance rod frame, the first distance rod frame is provided with a first movable disc capable of horizontal rotation and horizontal displacement, the first movable disc is provided with a first Y-shaped support frame, the bottom foot of the first Y-shaped support frame cooperates with the first movable disc, the first distance rod frame is fixed with the first distance rod through the two top feet of the first Y-shaped support frame, the first end of the first distance rod is located at the fixed point of the first distance rod frame, the second end of the first distance rod is close to the center of the stator base, the first vertical frame is fixed to the second end of the first distance rod through a U-shaped tube, and the first vertical frame is connected to the first laser distance sensor and the first angle sensor upward through a first electric shaft rotating around a vertical axis;

[0024] The intersection of the negative axis of the x-axis and the circular edge of the stator base is taken as the fixed point of the second distance rod frame, the second distance rod frame is provided with a second movable disc capable of horizontal rotation and horizontal displacement, the second movable disc is provided with a second Y-shaped support frame, the bottom foot of the second Y-shaped support frame cooperates with the second movable disc, the second distance rod frame is fixed with the second distance rod through the two top feet of the second Y-shaped support frame, the first end of the second distance rod is located at the fixed point of the second distance rod frame, the second end of the second distance rod is close to the center of the stator base, the second end of the second distance rod is fixed with a second vertical frame through a U-shaped tube, and the second vertical frame is connected with the second laser distance sensor and the second angle sensor upward through a second electric shaft rotating around a vertical axis;

[0025] The intersection of the positive direction axis of the y-axis and the circular edge of the stator base is taken as the fixed point of the third distance rod frame, the third distance rod frame is provided with a third movable disc capable of horizontal rotation and horizontal displacement, the third movable disc is provided with a third Y-shaped support frame, the bottom foot of the third Y-shaped support frame cooperates with the third movable disc, the third distance rod frame is fixed to the third distance rod by two top feet of the third Y-shaped support frame, the first end of the third distance rod is located at the fixed point of the third distance rod frame, the second end of the third distance rod is close to the center of the stator base, the third vertical frame is fixed to the second end of the third distance rod by a U-shaped tube, and the third vertical frame is connected to the third laser distance sensor and the third angle sensor upward through a third electric shaft rotating around a vertical axis;

[0026] After the 24V power supply is turned on, the first laser distance measuring sensor, the second laser distance measuring sensor and the third laser distance measuring sensor start to emit lasers. The first distance rod frame, the second distance rod frame and the third distance rod frame all include an edge magnetic card plate and a magnetic knob. The surveyor places the edge magnetic card plate close to the intersection of the edge of the stator inner wall and rotates the magnetic knob to make the magnetic sheet on the edge magnetic card plate magnetically attracted to the stator inner wall. The surveyor passes the first distance rod, the second distance rod and the third distance rod through the bolt clamping ring provided on the Y-shaped support frame and places the first ends of the first distance rod, the second distance rod and the third distance rod against the edge magnetic card plate. The first laser distance measuring sensor, the second laser distance measuring sensor and the third laser distance measuring sensor face upward and are respectively moved slowly horizontally toward the direction of the piano line until the laser hits the piano line and stops. The distance rods are fixed by the bolt buckle in cooperation with the bolt clamping ring.

[0027] S3: Turn on the 10V power supply, turn on the computer, and send measurement data commands to the first laser distance sensor, the first angle sensor, the second laser distance sensor, the second angle sensor, the third laser distance sensor, and the third angle sensor through the main control module. The first electric shaft, the second electric shaft, and the third electric shaft start to rotate up and down synchronously. After measuring for 10 seconds, the measured distance data and the corresponding angle data are transmitted back to the computer for storage. The distance rod is rotated left and right until a set of continuous distance data is obtained on the computer, and the distance data is automatically recognized by the sensor.

[0028] S4: The computer screens the distance data, selects the smallest distance data measured by the three laser distance measuring sensors and the angle data between the distance rod and the corresponding angle sensor, a total of three groups of data; if the corresponding angle data in a group of data are all 0°, then the group of data is determined to be directly valid data; if there is a group of data corresponding to angle data that are not all 0°, then the group of data is determined to be data that needs to be converted;

[0029] S5: The computer screens and corrects the distance data screened in S4 again, and uses the specific algorithm of the stator center measurement and adjustment calculation system to perform calculations.

[0030] Preferably, the first distance rod, the second distance rod and the third distance rod are all multi-section spliced ​​rod spliced ​​type distance rods, the length of each section of the spliced ​​rod is a known value, and the sections of the spliced ​​rods are tightly connected by threaded twisting.

[0031] Preferably, the first electric rotating shaft, the second electric rotating shaft and the third electric rotating shaft are respectively equipped with electric motors, and a computer controls the start-up and reverse rotation of the electric motors. After the electric motors are started, the main shafts of the electric motors begin to rotate, and drive the gears on the main shafts to rotate accordingly. The gears drive the gears connected to the laser ranging sensor through the reduction gear set, so that the sensor can rotate up and down in the vertical direction.

[0032] Preferably, the two ends of the first electric shaft, the second electric shaft and the third electric shaft are respectively connected to the laser ranging sensor and the angle sensor of the corresponding laser sensor and the corresponding vertical rod, the position of the vertical rod is fixed and connected to the second end of the corresponding distance rod through a U-shaped tube, the horizontal distance of the laser measuring point from the outside of the vertical rod and the horizontal length of the U-shaped tube are known, and the laser ranging sensor is connected to the electric shaft.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The invention proposes an automatic vertical hydroelectric unit stator center measurement and adjustment system, which adopts a combination design of three sets of distance rod frames, distance rods and sensors through a combination of software and hardware, and combines the software algorithm of the stator center measurement and adjustment calculation system to realize automatic measurement of the distance from the edge of the hydroelectric unit stator base to the position of the piano wire, and obtains data such as the offset angle and offset distance between the stator center and the position of the piano wire through calculation, which is convenient for adjustment. The invention solves the technical problems of consuming a lot of manpower and material resources and having errors in reading the indications and low accuracy when measuring and adjusting the stator center of the hydroelectric unit stator, and at the same time, the micrometer touches the piano wire, causing the jitter offset of the piano wire position, which further affects the precise installation of the stator. The invention has the beneficial effects of safe and simple operation and high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a fully automatic vertical hydroelectric unit shaft swing measurement and adjustment calculation system provided by an embodiment of the present invention;

[0036] Figure 2 A flow chart of the effectiveness detection of sensor distance data of a vertical hydroelectric generator stator center measurement and adjustment system provided by an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of the overall hardware structure in the y-axis direction of a vertical hydropower unit stator center measurement and adjustment system provided by an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of the distance rod frame structure of a stator center measurement and adjustment system for a vertical hydropower unit provided by an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of the structure of an electric rotating shaft of a stator center measurement and adjustment system for a vertical hydropower unit provided by an embodiment of the present invention;

[0040] Figure 6 The present invention provides an example of a vertical hydroelectric generator set stator center measurement and adjustment system algorithm in a two-dimensional plane.

[0041] Figure symbols: computer 1, total transceiver control module 2, first control module 3, second control module 4, third control module 5, first laser distance measuring sensor 6, second laser distance measuring sensor 7, third laser distance measuring sensor 8, first angle sensor 9, second angle sensor 10, third angle sensor 11, electric shaft 1 12, electric shaft 2 13, electric shaft 3 14, stator base 15, piano wire 16, distance rod frame 17, distance rod 18, U-shaped tube 19, electric shaft 20, laser distance measuring sensor 21, angle sensor 22, wireless transmission device 23, rod frame base 24, movable disc 25, Y-shaped support frame 26, bolt retaining ring 27, bolt buckle 28, edge magnetic card plate 29, 24V battery 30, 10V battery 31, magnetic knob 32, magnetic sheet 33, motor 34, motor main shaft 35, reduction gear set 36, movable shaft 37, laser distance measuring sensor bottom 38. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution method of the present invention, the present invention is further described in detail below with reference to specific embodiments in conjunction with the accompanying drawings. However, this method is not limited to a specific example and can be applied to similar situations.

[0043] Example 1

[0044] Please refer to Figures 1 to 6 , an automatic vertical hydropower unit stator center measurement and adjustment system, comprising: a sensor detection module, a transmission control module, a stator center measurement and adjustment calculation system;

[0045] The sensor detection module includes a first laser distance measuring sensor 6, a second laser distance measuring sensor 7, a third laser distance measuring sensor 8, a first angle sensor 9, a second angle sensor 10, and a third angle sensor 11, wherein the first laser distance measuring sensor 6, the second laser distance measuring sensor 7, the third laser distance measuring sensor 8, the first angle sensor 9, the second angle sensor 10, and the third angle sensor 11 are respectively connected to the 24V DC bus through a single-phase air switch;

[0046] The stator center measurement and adjustment calculation system includes a computer 1 and a total transceiver control module 2, wherein the computer 1 is connected to a DC bus and powered by the DC bus, and the total transceiver control module 2 is connected to a 10V DC bus and powered by the 10V DC bus;

[0047] The transmission control module includes a first control module 3, a second control module 4, and a third control module 4. The two ends of the first control module 3 are respectively connected to a first laser ranging sensor 6, a first angle sensor 9, an electric shaft 2 12, and a total transceiver control module 2. The two ends of the second control module 4 are respectively connected to a second laser ranging sensor 7, a second angle sensor 10, an electric shaft 2 13, and a total transceiver control module 2. The two ends of the third control module 4 are respectively connected to a third laser ranging sensor 8, a third angle sensor 11, an electric shaft 3 14, and a total transceiver control module 2. The first control module 3, the second control module 4, and the third control module 5 are respectively connected to a 10V DC bus through a single-phase air switch. The stator center measurement and adjustment calculation system automatically calculates and measures the distance from the edge of the stator base 15 of the hydropower unit to the piano wire 16, and automatically provides data such as the offset angle and offset distance between the stator center and the piano wire 16 through system calculation.

[0048] When measuring after completing the sensor arrangement, the measuring personnel only need to click start on the computer 1, and the system will automatically start measuring and calculating. The working steps of the automatic vertical hydropower unit stator center measurement and adjustment system are as follows:

[0049] Step 1: Hang the stator into the corresponding position of the unit to measure and adjust the center;

[0050] Step 2. Select two symmetrical points on the circle of the stator base 15, and establish the line connecting the two points as the x-axis in the rectangular coordinate system. Then select a bisection point between the two points on the circle, and take the direction of the line connecting the center of the circle to this point as the positive direction of the y-axis. Take the intersection of the axis of the positive direction of the x-axis and the edge of the circle of the base 15, fix one end of the distance rod 18 through the distance rod frame 17 with a horizontally rotatable movable disk 25, and fix a vertical frame through a U-shaped tube 19 at the end of the distance rod close to the center of the circle, and connect the first laser ranging sensor 6 and the first angle sensor 9 to the upper end of the vertical frame through an electric rotating shaft 12 that can rotate in the vertical direction. Take the intersection of the axis of the negative direction of the x-axis and the edge of the circle of the base 15, fix one end of the distance rod 18 through the distance rod frame 17 with a horizontally rotatable movable disk 25, and A vertical frame is fixed at one end through a U-shaped tube 19, and the upper end of the vertical frame is connected to the second laser distance sensor 7 and the second angle sensor 10 through the electric shaft 2 13 that can rotate in the vertical direction. Take the intersection of the positive direction of the y-axis and the edge of the base circle, fix one end of the distance rod 18 through the distance rod frame 17 with a horizontally rotatable movable disk 25, and fix a vertical frame at the end of the distance rod 18 close to the center of the circle through the U-shaped tube 19, and the upper end of the vertical frame is connected to the third laser distance sensor 8 and the third angle sensor 11 through the electric shaft 3 14 that can rotate in the vertical direction. Connect the 24V battery 30, the first laser distance sensor 6, the second laser distance sensor 7, and the third laser distance sensor 8 start to emit lasers, and the surveyor puts the edge magnetic card plate 29 close to the intersection of the edge of the stator inner wall, and turns the magnetic attraction knob 32 to make the magnetic attraction sheet 33 on the edge magnetic card plate 29 magnetically attracted to the inner wall of the stator. Then the surveyor passes the distance rod 18 through the bolt clamp ring 27 and places the outer distance rod 8 against the edge magnetic card plate 29, and slowly moves the distance rod 18 with the sensor side toward the piano wire 16 horizontally until the laser hits the piano wire 16 and stops, and fixes the distance rod 18 with the bolt buckle 28;

[0051] Step 3, connect the 10V battery 31, turn on the computer 1, send the measurement data signal to the wireless transmission device 23 through the main control module 2 to the first control module 3, the second control module 4 and the third control module 5, the first laser distance sensor 6, the first angle sensor 9, the second laser distance sensor 7, the second angle sensor 10, the third laser distance sensor 8, and the third angle sensor 11 execute the measurement data command accordingly, and the electric shaft 12, the electric shaft 2 13, and the electric shaft 3 14 start to rotate up and down synchronously. After measuring for 10 seconds, the measured distance data and the corresponding angle data are respectively transmitted back to the computer 1 for storage, and the distance rod 18 is gently rotated left and right until a set of continuous small distance data is obtained on the computer 1;

[0052] Step 4: The computer 1 screens the stored distance data and selects the minimum distance data measured by the three laser distance measuring sensors 21 and the corresponding angle data between the angle sensor 22 and the distance rod 18 as three sets of data. If the corresponding angle data in the set of data is 0°, the set of data is determined to be directly valid data. If there is a set of data whose corresponding angle data is not 0°, the set of data is determined to be data that needs to be converted.

[0053] Step 5: The computer 1 screens and corrects the screened distance data, and uses a combination of software and hardware to perform stator center measurement and adjustment optimization calculations using a trigonometric function method.

[0054] The electric shaft used in the present invention is equipped with a motor 34, and the computer 1 can control the motor 34 to start forward and reverse rotation. After the motor 34 is started, the motor main shaft 35 rotates, and drives the gear on the motor main shaft 35 to rotate accordingly. Meanwhile, the gear drives the gear fixed on the bottom 38 of the laser ranging sensor to rotate through the reduction gear set 36 fixed on the movable shaft 37, so that the sensor can rotate up and down in the vertical direction.

[0055] The specific algorithm of step five is:

[0056]

[0057] In formula 1, l a is the converted length of the distance rod where the first laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance measuring sensor is located, mm; α is the vertical offset angle of the distance rod measured by the first angle sensor, °;

[0058]

[0059] In formula 2, l b is the converted length of the distance rod where the second laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance sensor is located, mm; β is the vertical offset angle of the distance rod measured by the first angle sensor, °;

[0060]

[0061] In formula 3, l c is the converted length of the distance rod where the third laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance sensor is located, mm; σ is the vertical offset angle of the distance rod measured by the first angle sensor, °;

[0062]

[0063] In formula 4, A is the angle between the first laser ranging sensor and the x-axis, °; b is the distance measured by the second laser ranging sensor, mm; b0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the end point of the rod near the center, mm; d is the thickness of the edge magnetic card plate, mm; R is the diameter of the stator base disk, mm; a is the distance measured by the first laser ranging sensor, mm; a0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the end point of the rod near the center, mm;

[0064]

[0065] In equations 5 and 6, x is the coordinate of the piano wire position in the x-axis direction in the coordinate system, °; y is the coordinate of the piano wire position in the y-axis direction in the coordinate system, °; c is the distance measured by the third laser ranging sensor, mm; c0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the center position to the end point of the rod, mm;

[0066] Get the specific coordinates (x, y) of the center point of the piano wire in the coordinate system with the stator center as the origin, then translate the stator by xmm along the positive direction of the x-axis, ymm along the positive direction of the y-axis, or when x is a negative value, translate it in the negative direction of the x-axis, when y is a negative value, translate it in the negative direction of the y-axis, so that the stator center can coincide with the point where the piano wire is located, thereby realizing the measurement and adjustment of the stator center.

[0067] Example 2

[0068] Please refer to Table 1 for a simulation example provided by an embodiment of the present invention. α

[0069] α, β, σ, d, a, a0, b, b0, c, c0, R are all known quantities, and x and y are quantities to be determined. The actual offsets x and y in the simulation example are given.

[0070] Table 1

[0071]

[0072]

[0073] y=(a+l a +a0+d)sinA=421.930mm

[0074] The absolute errors of the predicted values ​​x and y are both within 0.1 mm, which meets the actual needs.

[0075] During the expansion of the unit, the center of the unit can be measured to understand the roundness and concentricity of the fixed parts of the unit. At the same time, by comparing the center measurement and adjustment data during the installation of the unit, the change of the center of the unit after long-term operation can be determined. According to the accurate unit center measurement data, by adjusting the center line of the unit to a relatively ideal state, the air gap of the generator and the gap between the leak-proof ring of the turbine and the runner chamber can be maintained in a uniform state during the operation of the unit, which can effectively reduce the magnetic imbalance force of the generator and the hydraulic imbalance force of the turbine, as well as the electromagnetic vibration and hydraulic vibration of the unit caused by them. In addition, the unit center measurement is an important basis for the adjustment of the unit axis. The accuracy of the unit center measurement data and the center of the unit after adjustment directly affect the quality of the unit axis adjustment, which is very important for the safe, reliable and stable operation of the unit.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic vertical hydropower unit stator center measurement and adjustment system, characterized in that: It includes a sensor detection module, a transmission control module, and a stator center measurement and adjustment calculation system. The sensor detection module includes a first laser distance sensor, a first angle sensor, a second laser distance sensor, a second angle sensor, a third laser distance sensor, and a third angle sensor. The first laser distance sensor, the first angle sensor, the second laser distance sensor, the second angle sensor, the third laser distance sensor, and the third angle sensor are respectively connected to a 24V DC bus through a single-phase air switch; The stator center measurement and adjustment calculation system includes a computer and a total transceiver control module, the computer is connected to a DC bus and powered by the DC bus, and the total transceiver control module is connected to a 10V DC bus and powered by the 10V DC bus; The transmission control module includes a first control module, a second control module, and a third control module. The two ends of the first control module are respectively connected to the first laser ranging sensor, the first angle sensor, the first electric shaft, and the total transceiver control module. The two ends of the second control module are respectively connected to the second laser ranging sensor, the second angle sensor, the second electric shaft, and the total transceiver control module; the two ends of the third control module are respectively connected to the third laser ranging sensor, the third angle sensor, the third electric shaft, and the total transceiver control module; the first control module, the second control module, and the third control module all wirelessly transmit and receive signals to the sensor through a wireless transmission device and are respectively connected to the 10V DC bus through a single-phase air switch; The stator center measurement and adjustment calculation system automatically measures and calculates the distance from the edge of the stator base of the hydropower unit to the piano wire, and automatically gives the data of the offset angle and offset distance between the stator center and the piano wire through the calculation of the stator center measurement and adjustment calculation system. The specific calculation algorithm of the stator center measurement and adjustment calculation system is as follows: In formula 1, l a is the converted length of the distance rod where the first laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance measuring sensor is located, mm; α is the vertical offset angle of the distance rod measured by the first angle sensor, °; In formula 2, l b is the converted length of the distance rod where the second laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance sensor is located, mm; β is the vertical offset angle of the distance rod measured by the first angle sensor, °; In formula 3, l c is the converted length of the distance rod where the third laser ranging sensor is located, mm; is the actual length of the distance rod where the first laser distance sensor is located, mm; σ is the vertical offset angle of the distance rod measured by the first angle sensor, °; In formula 4, A is the angle between the first laser ranging sensor and the x-axis, °; b is the distance measured by the second laser ranging sensor, mm; b0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the end point of the rod near the center, mm; d is the thickness of the edge magnetic card plate, mm; R is the diameter of the stator base disk, mm; a is the distance measured by the first laser ranging sensor, mm; a0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the end point of the rod near the center, mm; In equations 5 and 6, x is the coordinate of the piano wire position in the x-axis direction in the coordinate system, °; y is the coordinate of the piano wire position in the y-axis direction in the coordinate system, °; c is the distance measured by the third laser ranging sensor, mm; c0 is the horizontal distance from the distance measuring point of the second laser ranging sensor to the center position to the end point of the rod, mm; Get the specific coordinates (x, y) of the center point of the piano wire in the coordinate system with the stator center as the origin, then translate the stator by xmm along the positive direction of the x-axis, ymm along the positive direction of the y-axis, or when x is a negative value, translate it in the negative direction of the x-axis, when y is a negative value, translate it in the negative direction of the y-axis, so that the stator center can coincide with the point where the piano wire is located, thereby realizing the measurement and adjustment of the stator center.

2. The automatic vertical hydroelectric unit stator center measurement and adjustment system according to claim 1 is characterized in that: The working steps of the automatic vertical hydropower unit stator center measurement and adjustment system are as follows: S1: Hang the stator into the corresponding position of the unit for center measurement and adjustment; S2: Select two symmetrical points on the circle of the stator base (15), establish a rectangular coordinate system, take the line connecting the two symmetrical points as the x-axis, select a bisection point on the circle between the two symmetrical points, and take the direction of the line connecting the center of the circle to the bisection point as the positive direction of the y-axis; The intersection of the positive axis of the x-axis and the circular edge of the stator base is taken as the fixed point of the first distance rod frame, the first distance rod frame is provided with a first movable disc capable of horizontal rotation and horizontal displacement, the first movable disc is provided with a first Y-shaped support frame, the bottom foot of the first Y-shaped support frame cooperates with the first movable disc, the first distance rod frame is fixed with the first distance rod through the two top feet of the first Y-shaped support frame, the first end of the first distance rod is located at the fixed point of the first distance rod frame, the second end of the first distance rod is close to the center of the stator base, the first vertical frame is fixed to the second end of the first distance rod through a U-shaped tube, and the first vertical frame is connected to the first laser distance sensor and the first angle sensor upward through a first electric shaft rotating around a vertical axis; The intersection of the negative axis of the x-axis and the circular edge of the stator base is taken as the fixed point of the second distance rod frame, the second distance rod frame is provided with a second movable disc capable of horizontal rotation and horizontal displacement, the second movable disc is provided with a second Y-shaped support frame, the bottom foot of the second Y-shaped support frame cooperates with the second movable disc, the second distance rod frame is fixed with the second distance rod through the two top feet of the second Y-shaped support frame, the first end of the second distance rod is located at the fixed point of the second distance rod frame, the second end of the second distance rod is close to the center of the stator base, the second end of the second distance rod is fixed with a second vertical frame through a U-shaped tube, and the second vertical frame is connected with the second laser distance sensor and the second angle sensor upward through a second electric shaft rotating around a vertical axis; The intersection of the positive direction axis of the y-axis and the circular edge of the stator base is taken as the fixed point of the third distance rod frame, the third distance rod frame is provided with a third movable disc capable of horizontal rotation and horizontal displacement, the third movable disc is provided with a third Y-shaped support frame, the bottom foot of the third Y-shaped support frame cooperates with the third movable disc, the third distance rod frame is fixed to the third distance rod by two top feet of the third Y-shaped support frame, the first end of the third distance rod is located at the fixed point of the third distance rod frame, the second end of the third distance rod is close to the center of the stator base, the third vertical frame is fixed to the second end of the third distance rod by a U-shaped tube, and the third vertical frame is connected to the third laser distance sensor and the third angle sensor upward through a third electric shaft rotating around a vertical axis; After the 24V power supply is turned on, the first laser distance measuring sensor, the second laser distance measuring sensor and the third laser distance measuring sensor start to emit lasers. The first distance rod frame, the second distance rod frame and the third distance rod frame all include an edge magnetic card plate and a magnetic knob. The surveyor places the edge magnetic card plate close to the intersection of the edge of the stator inner wall and rotates the magnetic knob to make the magnetic sheet on the edge magnetic card plate magnetically attracted to the stator inner wall. The surveyor passes the first distance rod, the second distance rod and the third distance rod through the bolt clamping ring provided on the Y-shaped support frame and places the first ends of the first distance rod, the second distance rod and the third distance rod against the edge magnetic card plate. The first laser distance measuring sensor, the second laser distance measuring sensor and the third laser distance measuring sensor face upward and are respectively moved slowly horizontally toward the direction of the piano line until the laser hits the piano line and stops. The distance rods are fixed by the bolt buckle in cooperation with the bolt clamping ring. S3: Turn on the 10V power supply, turn on the computer, and send measurement data commands to the first laser distance sensor, the first angle sensor, the second laser distance sensor, the second angle sensor, the third laser distance sensor, and the third angle sensor through the main control module. The first electric shaft, the second electric shaft, and the third electric shaft start to rotate up and down synchronously. After measuring for 10 seconds, the measured distance data and the corresponding angle data are transmitted back to the computer for storage. The distance rod is rotated left and right until a set of continuous distance data is obtained on the computer, and the distance data is automatically recognized by the sensor. S4: The computer screens the distance data, selects the smallest distance data measured by the three laser distance measuring sensors and the angle data between the distance rod and the corresponding angle sensor, a total of three groups of data; if the corresponding angle data in a group of data are all 0°, then the group of data is determined to be directly valid data; if there is a group of data corresponding to angle data that are not all 0°, then the group of data is determined to be data that needs to be converted; S5: The computer screens and corrects the distance data screened in S4 again, and uses the specific algorithm of the stator center measurement and adjustment calculation system to perform calculations.

3. The automatic vertical hydroelectric unit stator center measurement and adjustment system according to claim 2 is characterized in that: The first distance rod, the second distance rod and the third distance rod are all multi-section spliced ​​rod spliced ​​distance rods, the length of each section of the spliced ​​rod is a known value, and the sections of the spliced ​​rods are tightly connected by screw threads.

4. The automatic vertical hydroelectric unit stator center measurement and adjustment system according to claim 2 is characterized in that: The first electric rotating shaft, the second electric rotating shaft and the third electric rotating shaft are respectively equipped with electric motors, and the computer controls the motors to start forward and reverse rotation. After the motors are started, the main shafts of the motors begin to rotate, and drive the gears on the main shafts to rotate accordingly. The gears drive the gears connected to the laser ranging sensor through the reduction gear set, so that the sensor can rotate up and down in the vertical direction.

5. The automatic vertical hydroelectric unit stator center measurement and adjustment system according to claim 2 is characterized in that: The two ends of the first electric rotating shaft, the second electric rotating shaft and the third electric rotating shaft are respectively connected to the laser ranging sensor and the angle sensor of the corresponding laser sensor and the corresponding vertical rod. The position of the vertical rod is fixed and connected to the second end of the corresponding distance rod through a U-shaped tube. The horizontal distance of the laser measuring point from the outside of the vertical rod and the horizontal length of the U-shaped tube are known. The laser ranging sensor is connected to the electric rotating shaft.

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