Water turbine and installation gap adjusting system and control method of rotating speed sensor of water turbine

Abstract

The invention relates to the technical field of water turbines, and discloses a water turbine and a mounting clearance adjusting system and control method of a rotating speed sensor of the water turbine, the system comprises a speed measuring fluted disc, a pulse sensor, a distance sensor, a driving device and a controller, and the driving device is connected with the pulse sensor and the distance sensor; the controller is connected with the pulse sensor, the distance sensor and the driving device and used for sending a driving instruction to the driving device according to the gap distance so that the driving device can drive the pulse sensor and the distance sensor to synchronously move towards the edge of the speed measuring fluted disc or move away from the edge of the speed measuring fluted disc according to the driving instruction. The system can solve the abnormal problems of unstable rotating speed signals, jumping and the like of a unit caused by difficulty in adjusting the gap between the speed measuring fluted disc and the pulse sensor, ensures safe and stable operation of the unit, prolongs the service life of the pulse sensor, and ensures that the gap distance between the pulse sensor and the edge of the speed measuring fluted disc is within the optimal gap range.

Description

Technical Field

[0001] The present invention relates to the technical field of water turbines, and in particular to an installation gap adjustment system of a water turbine speed sensor, a control method of the installation gap adjustment system of a water turbine speed sensor, a water turbine and a water turbine generator set. Background Art

[0002] At present, the speed measurement of hydro-turbine generator sets usually adopts the gear pulse speed measurement and electrical residual pressure speed measurement methods. The gear pulse speed measurement is also called mechanical speed. It adopts the principle of variable gate measurement period and has the advantages of high measurement accuracy and strong real-time performance. The electrical residual pressure speed measurement is also called electrical speed. It collects the voltage of the voltage transformer at the generator outlet and is often used for electromagnetic measurement. The disadvantage is that it will affect the accuracy of electromagnetic measurement when the equipment fails. Therefore, the gear pulse speed measurement signal is not limited by the residual voltage of the generator, and is less affected by non-periodic noise. Compared with the residual voltage signal of the voltage transformer, it has higher reliability and is an ideal speed input signal. The gear pulse speed measurement is widely used. By fixing a machined gear on the main shaft of the generator, the gear rotates synchronously with the main shaft of the generator, and the pulse sensor is installed on the edge of the gear (proximity switch, etc.), the pulse sensor obtains the gear pulse signal by detecting the on and off of the optical signal on the gear.

[0003] When the unit is overhauled or maintained, it is necessary to manually adjust the installation gap between the pulse sensor and the toothed disc. Since the toothed disc has concave and convex teeth and a certain curvature, it is difficult to adjust the gap between the pulse sensor and the toothed disc. If the gap is too small, there is a risk that the unit toothed disc will damage the pulse sensor; if the gap is too large, the pulse signal will be unstable or jump, affecting the safe and stable operation of the unit. At the same time, the pulse sensor cannot provide fault alarm when the power is lost or the line is broken, which will also affect the safe and stable operation of the unit. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to provide an installation gap adjustment system for a turbine speed sensor, which can solve the problem of the difficulty in adjusting the gap between the speed measuring toothed disc and the pulse sensor, which leads to abnormal problems such as unstable and jumping speed signals of the unit, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is within the optimal gap range.

[0005] A second object of the present invention is to provide a control method for an installation clearance adjustment system of a turbine speed sensor.

[0006] The third object of the present invention is to provide a water turbine.

[0007] A fourth object of the present invention is to provide a hydro-generator set.

[0008] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes an installation gap adjustment system for a turbine speed sensor, comprising: a speed measuring sprocket, which is fixed on the main shaft of the turbine and rotates synchronously with the main shaft; a pulse sensor, which is arranged toward the edge of the speed measuring sprocket and is used to measure the pulse frequency caused by the rotation of the speed measuring sprocket; a distance sensor, which is arranged toward the edge of the speed measuring sprocket and is used to measure the gap distance between the pulse sensor and the edge of the speed measuring sprocket; a driving device, which is connected to the pulse sensor and the distance sensor; and a controller, which is connected to the pulse sensor, the distance sensor and the driving device and is used to send a driving instruction to the driving device according to the gap distance, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring sprocket or away from the edge of the speed measuring sprocket according to the driving instruction.

[0009] In addition, the installation gap adjustment system of the turbine speed sensor according to the above embodiment of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the installation gap adjustment system of the above-mentioned turbine speed sensor also includes: a power supply module, which is communicatively connected to the pulse sensor, distance sensor, drive device and controller, and is used to supply power to the pulse sensor, distance sensor, drive device and controller.

[0011] According to some embodiments of the present invention, the installation gap adjustment system of the above-mentioned turbine speed sensor also includes: an alarm module, which is connected to the pulse sensor and the distance sensor, and is used to monitor the working status of the pulse sensor according to the pulse frequency, monitor the working status of the distance sensor according to the gap distance, and issue an alarm message in response to an abnormality in the working status of the pulse sensor and / or the distance sensor.

[0012] According to some embodiments of the present invention, the driving device includes a driving base, the driving base is provided with a first limiting area and a second limiting area, the pulse sensor is vertically arranged in the first limiting area, and the distance sensor is vertically arranged in the second limiting area.

[0013] According to some embodiments of the present invention, the pulse sensor is provided with a first probe, and the distance sensor is provided with a second probe. The first probe is arranged toward the edge of the speed measuring sprocket, and the second probe is arranged toward the edge of the speed measuring sprocket, and the end face of the first probe is flush with the end face of the second probe.

[0014] The installation gap adjustment system of the turbine speed sensor according to the embodiment of the present invention comprises: a speed measuring toothed disc, the speed measuring toothed disc is fixed on the main shaft of the turbine and rotates synchronously with the main shaft; a pulse sensor, the pulse sensor is arranged toward the edge of the speed measuring toothed disc, and is used to measure the pulse frequency caused by the rotation of the speed measuring toothed disc; a distance sensor, the distance sensor is arranged toward the edge of the speed measuring toothed disc, and is used to measure the gap distance between the pulse sensor and the edge of the speed measuring toothed disc; a driving device, the driving device is connected with the pulse sensor and the distance sensor; a controller, the controller is connected with the pulse sensor, the distance sensor and the driving device, and is used to send a driving instruction to the driving device according to the gap distance, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring toothed disc or away from the edge of the speed measuring toothed disc according to the driving instruction. Therefore, the system can solve the abnormal problems such as the instability and jump of the unit speed signal caused by the difficulty in adjusting the gap between the speed measuring toothed disc and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is within the optimal gap range.

[0015] The second purpose of the present invention is to propose a control method for the installation gap adjustment system of a turbine speed sensor, which can solve the problem of abnormal problems such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring gear disc and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring gear disc is within the optimal gap range.

[0016] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present invention proposes a control method for an installation gap adjustment system of a turbine speed sensor, which is applied to the above-mentioned installation gap adjustment system of the turbine speed sensor, including: obtaining the gap distance between the pulse sensor and the edge of the speed measuring gear disc; determining whether the gap distance is within a preset gap distance range; in response to the gap distance not being within the preset gap distance range, sending a driving instruction to a driving device, so that the driving device drives the pulse sensor and the distance sensor to synchronously move toward the edge of the speed measuring gear disc or away from the edge of the speed measuring gear disc according to the driving instruction.

[0017] In addition, the control method of the installation clearance adjustment system of the turbine speed sensor according to the above embodiment of the present invention may also have the following additional technical features:

[0018] According to some embodiments of the present invention, the driving instruction includes a first driving instruction; determining whether the gap distance is within a preset driving distance range also includes: determining whether the gap distance is greater than the first preset gap distance, and in response to the gap distance being greater than the first preset gap distance, sending a first driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring sprocket according to the first driving instruction.

[0019] According to some embodiments of the present invention, the driving instruction includes a second driving instruction; determining whether the gap distance is within a preset driving distance range also includes: in response to the gap distance being less than the first preset gap distance, determining whether the gap distance is less than the second preset gap distance, and in response to the gap distance being less than the second preset gap distance, sending a second driving instruction to the driving device so that the driving device drives the pulse sensor and the distance sensor to move synchronously away from the edge of the speed measuring sprocket according to the second driving instruction.

[0020] According to an embodiment of the present invention, a control method for the installation gap adjustment system of a turbine speed sensor includes: obtaining the gap distance between the pulse sensor and the edge of the speed measuring toothed disc; determining whether the gap distance is within a preset gap distance range; in response to the gap distance not being within the preset gap distance range, sending a driving instruction to a driving device, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring toothed disc or away from the edge of the speed measuring toothed disc according to the driving instruction. Therefore, the method can solve the problem of abnormalities such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring toothed disc and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is within the optimal gap range.

[0021] To achieve the above-mentioned purpose, the third aspect of the present invention proposes a turbine, comprising: a turbine body, the turbine body having a fixed end and a turbine main shaft; and an adjustment system, the adjustment system being an installation clearance adjustment system of the above-mentioned turbine speed sensor, the speed measuring gear disc being fixed on the turbine main shaft and rotating synchronously with the turbine main shaft, and the driving device being connected to the fixed end.

[0022] The water turbine according to the embodiment of the present invention can solve the abnormal problems such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring gear disc and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring gear disc is within the optimal gap range.

[0023] To achieve the above-mentioned purpose, a fourth aspect of the present invention provides a hydro-generator set, comprising the above-mentioned hydro-turbine.

[0024] The hydro-turbine generator set according to the embodiment of the present invention, by including the above-mentioned hydro-turbine, can solve the abnormal problems such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring gear disc and the pulse sensor, thereby ensuring the safe and stable operation of the unit, extending the service life of the pulse sensor, and ensuring that the gap distance between the pulse sensor and the edge of the speed measuring gear disc is within the optimal gap range.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a mounting clearance adjustment system for a turbine speed sensor according to some embodiments of the present invention;

[0027] Figure 2 A flowchart of a control method of an installation clearance adjustment system of a turbine speed sensor according to some embodiments of the present invention;

[0028] Figure 3 A flowchart of a control method of an installation clearance adjustment system of a turbine speed sensor according to other embodiments of the present invention;

[0029] Figure 4 is a block diagram of a water turbine according to some embodiments of the present invention;

[0030] Figure 5 Schematic block diagram of a hydro-generator set according to some embodiments of the present invention.

[0031] Description of Reference Numerals

[0032] 10-turbine main shaft, 20-speed measuring gear, 30-pulse sensor, 31-first probe, 40-distance sensor, 41-second probe, 50-driving device, 51-driving base, 511-first limit area, 512-second limit area, 400-turbine, 410-turbine body, 420-regulation system and 500-hydraulic generator set. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] As mentioned in the background technology section, at present, the speed measurement of hydro-turbine generator sets usually adopts gear pulse speed measurement and electrical residual voltage speed measurement methods. Gear pulse speed measurement is also called mechanical speed. It adopts the principle of variable gate measurement period and has the advantages of high measurement accuracy and strong real-time performance. Electrical residual voltage speed measurement is also called electrical speed. It collects the voltage of the voltage transformer at the generator outlet and is often used for electromagnetic measurement. The disadvantage is that it will affect the accuracy of electromagnetic measurement when there is an electrical failure in the equipment. Therefore, the gear pulse speed measurement signal is not limited by the residual voltage of the generator, and is less affected by non-periodic noise. Compared with the residual voltage signal of the voltage transformer, it has higher reliability and is an ideal speed input signal. Gear pulse speed measurement is widely used.

[0036] By fixing a processed toothed disc on the main shaft of the generator, the toothed disc rotates synchronously with the main shaft of the generator, and the pulse sensor is installed on the edge of the toothed disc (proximity switch, etc.). The pulse sensor obtains the toothed disc pulse signal by detecting the on and off of the light signal on the toothed disc. The processing of the toothed disc can be determined according to the actual situation on site, and the width and height of the teeth are required to be greater than 20mm; the pulse sensor is required to be installed vertically with the toothed disc, and the vertical distance between the pulse sensor and the toothed disc is usually greater than 0.5mm and less than 4mm.

[0037] In the process of implementing the present invention, the applicant discovered that when the unit is overhauled or maintained, it is necessary to manually adjust the installation gap between the pulse sensor and the toothed disc. Since the toothed disc has concave and convex teeth and a certain curvature, it is difficult to adjust the gap between the pulse sensor and the toothed disc. If the gap is too small, there is a risk that the unit toothed disc will damage the pulse sensor; if the gap is too large, the pulse signal will be unstable or jump, affecting the safe and stable operation of the unit. At the same time, the pulse sensor cannot provide fault alarm when the power is lost, the line is broken, etc., which will also affect the safe and stable operation of the unit.

[0038] The following describes, with reference to the accompanying drawings, an installation gap adjustment system for a turbine speed sensor, a control method for an installation gap adjustment system for a turbine speed sensor, a turbine, and a turbine generator set provided in embodiments of the present invention.

[0039] The installation gap adjustment system 100 of the turbine speed sensor of the present invention includes: a speed measuring gear 20, a pulse sensor 30, a distance sensor 40, a driving device 50, a controller (not shown in the figure), a power module (not shown in the figure) and an alarm module (not shown in the figure).

[0040] The speed measuring toothed disc 20 is fixed on the main shaft 10 of the turbine and rotates synchronously with the main shaft 10 of the turbine. The speed measuring toothed disc 20 can be fixed on the main shaft 10 of the turbine by key connection, conical connection, bolt connection or welding. The speed measuring toothed disc 20 can adopt the speed measuring principle of electromagnetic speed measurement, that is, when the main shaft 10 of the turbine rotates and drives the speed measuring toothed disc 20 to rotate, the teeth of the speed measuring toothed disc 20 pass through the sensor, causing the magnetic resistance of the circuit to change, and a square wave electric pulse is formed after amplification and shaping, and the speed value of the speed measuring toothed disc 20 is obtained by recording the number of pulses.

[0041] The pulse sensor 30 is arranged toward the edge of the speed measuring gear disc 20, and there is a certain distance between the pulse sensor 30 and the speed measuring gear disc 20. The pulse sensor 30 is used to measure the pulse frequency caused by the rotation of the speed measuring gear disc 20. The pulse frequency directly reflects the speed signal of the turbine. The pulse sensor 30 is commonly used but not limited to inductive proximity switches, etc.

[0042] The distance sensor 40 is arranged toward the edge of the speed measuring sprocket 20, and there is a certain distance between the distance sensor 40 and the speed measuring sprocket 20. The distance sensor 40 is used to measure the gap distance between the pulse sensor 30 and the edge of the speed measuring sprocket 20. The distance sensor 40 is commonly used but not limited to distance measurement technologies such as laser, sound wave, and infrared. Among them, the distance sensor 40 can be an ultrasonic ranging sensor. The pulse sensor 30 and the distance sensor 40 are installed on the same vertical line, and there is a certain distance between the pulse sensor 30 and the distance sensor 40.

[0043] The pulse sensor 30 is provided with a first probe 31, and the distance sensor 40 is provided with a second probe 41. The first probe 31 is set toward the edge of the speed measuring sprocket 20, and the second probe 41 is set toward the edge of the speed measuring sprocket 20. The end face of the first probe 31 is flush with the end face of the second probe 41, so that the distance from the end face of the first probe 31 to the edge of the speed measuring sprocket 20 is equal to the distance from the end face of the second probe 41 to the edge of the speed measuring sprocket 20.

[0044] As a specific embodiment, when the distance sensor 40 is an ultrasonic ranging sensor, the ultrasonic ranging sensor determines the size and height of the object by emitting and receiving ultrasonic signals. The specific steps are: aiming the probe of the ultrasonic ranging sensor at the target object and emitting an ultrasonic signal; the ultrasonic signal hits the surface of the target object and is reflected back, and is received by the probe of the ultrasonic ranging sensor, and after time calculation, the distance between the surface of the target object and the probe of the ultrasonic ranging sensor is obtained.

[0045] The driving device 50 is connected with the pulse sensor 30 and the distance sensor 40. The driving device 50 includes a driving base 51. The driving base 51 is provided with a first limiting area 511 and a second limiting area 512. The pulse sensor 30 is vertically arranged in the first limiting area 511, and the distance sensor 40 is vertically arranged in the second limiting area 512. The driving base 51 has a forward and backward movement function to ensure that the distance sensor 40 and the pulse sensor 30 move forward and backward as a whole at the same time. The driving base 51 is usually moved by, but not limited to, a motor, hydraulic pressure, air pressure and other transmission methods. When the driving base 51 moves forward, the end face of the first probe 31 of the distance sensor 40 and the end face of the second probe 41 of the pulse sensor 30 and the edge gap of the speed measuring toothed disc 20 are reduced; when the driving base 51 moves backward, the end face of the first probe 31 of the distance sensor 40 and the end face of the second probe 41 of the pulse sensor 30 and the edge gap of the speed measuring toothed disc 20 are increased.

[0046] The controller is connected to the pulse sensor 30, the distance sensor 40 and the driving device 50. The controller is used to send a driving instruction to the driving device 50 according to the gap distance between the pulse sensor 30 and the edge of the speed measuring toothed disc 20, so that the driving device 50 drives the pulse sensor 30 and the distance sensor 40 to move synchronously toward the edge of the speed measuring toothed disc 20 or away from the edge of the speed measuring toothed disc 20 according to the driving instruction, and automatically adjusts the gap distance between the pulse sensor 30 and the edge of the speed measuring toothed disc 20 to ensure that the pulse signal output by the pulse sensor 30 is stable, continuous, and has no jumps, thereby extending the service life of the pulse sensor 30 and ensuring the safe and stable operation of the unit.

[0047] The power module is communicatively connected with the pulse sensor 30, the distance sensor 40, the drive device 50 and the controller. The power module is used to provide reliable and stable power for the pulse sensor 30, the distance sensor 40, the drive device 50 and the controller. The power module is commonly used and is not limited to a switching power module.

[0048] The alarm module is connected to the pulse sensor 30, the distance sensor 40 and the power module. The alarm module is used to monitor the working state of the pulse sensor 30 according to the pulse frequency, monitor the working state of the distance sensor 40 according to the gap distance, and monitor the working state of the power module according to whether the power is lost. When the working state of the pulse sensor 30 is abnormal (i.e., the pulse frequency is too large or too small or the pulse sensor 30 is faulty or the turbine main shaft 10 is faulty) and / or the working state of the distance sensor 40 is abnormal (i.e., the gap distance is too large or too small or the distance sensor 40 is faulty) and / or the working state of the power module is abnormal (i.e., the power is lost or the power is faulty), the alarm module sends out an alarm message and uploads the alarm message of the corresponding working state to the computer monitoring system, which can effectively avoid unplanned shutdown of the unit and remind the operation and maintenance personnel to handle the fault in time.

[0049] In summary, the installation gap adjustment system of the turbine speed sensor according to the embodiment of the present invention includes: a speed measuring toothed disc, the speed measuring toothed disc is fixed on the main shaft of the turbine and rotates synchronously with the main shaft; a pulse sensor, the pulse sensor is arranged toward the edge of the speed measuring toothed disc, and is used to measure the pulse frequency caused by the rotation of the speed measuring toothed disc; a distance sensor, the distance sensor is arranged toward the edge of the speed measuring toothed disc, and is used to measure the gap distance between the pulse sensor and the edge of the speed measuring toothed disc; a driving device, the driving device is connected with the pulse sensor and the distance sensor; a controller, the controller is connected with the pulse sensor, the distance sensor and the driving device, and is used to send a driving instruction to the driving device according to the gap distance, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring toothed disc or away from the edge of the speed measuring toothed disc according to the driving instruction. Therefore, the system can solve the abnormal problems such as the instability and jump of the unit speed signal caused by the difficulty in adjusting the gap between the speed measuring toothed disc and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is within the optimal gap range.

[0050] refer to Figure 2 , is a flow chart of a control method of an installation clearance adjustment system of a turbine speed sensor according to some embodiments of the present invention.

[0051] like Figure 2 As shown, the control method of the installation clearance adjustment system of the turbine speed sensor according to the embodiment of the present invention may include the following steps:

[0052] S201, obtaining the gap distance between the pulse sensor and the edge of the speed measuring gear disc.

[0053] Specifically, the installation gap adjustment system of the turbine speed sensor is initialized so that the first probe of the distance sensor and the second probe of the pulse sensor are set at the initial position of the system, that is, the gap distance between the pulse sensor and the edge of the speed measuring sprocket is maximized, and the gap distance between the pulse sensor and the edge of the speed measuring sprocket can be obtained through the distance sensor.

[0054] In some embodiments, a photoelectric or proximity sensor is used to generate a pulse signal reflecting the rotation speed of the unit, and the gap distance between the pulse sensor and the edge of the speed measuring gear disc is indirectly determined by measuring the change of the pulse signal.

[0055] S202, determining whether the gap distance is within a preset gap distance range, wherein the preset gap distance range may be calibrated according to actual conditions.

[0056] Specifically, after obtaining the gap distance between the pulse sensor and the edge of the speed measuring sprocket, it is necessary to further determine whether the gap distance is within the preset gap distance range, so as to confirm whether the pulse sensor position needs to be adjusted or how to adjust the pulse sensor position based on the judgment result.

[0057] S203, in response to the gap distance not being within the preset gap distance range, sending a driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to synchronously move toward the edge of the speed measuring sprocket or away from the edge of the speed measuring sprocket according to the driving instruction.

[0058] Specifically, when the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is not within the preset gap distance range, it means that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is too large or too small. At this time, the controller sends a driving instruction to the driving device according to the gap distance between the pulse sensor and the edge of the speed measuring toothed disc, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring toothed disc or away from the edge of the speed measuring toothed disc according to the driving instruction. For example, when the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is too large, in order to prevent the pulse signal from being unstable or jumping, which affects the safe and stable operation of the unit, the driving device can drive the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring toothed disc according to the driving instruction, so that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is within the preset gap distance range; for another example, when the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is too small, in order to prevent the speed measuring toothed disc from hitting the pulse sensor, the driving device can drive the pulse sensor and the distance sensor to move away from the edge of the speed measuring toothed disc according to the driving instruction, so that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is within the preset gap distance range. This can solve the problem of abnormal problems such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring gear disc and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring gear disc is within the optimal gap range.

[0059] In some embodiments of the present invention, the driving instruction includes a first driving instruction;

[0060] Determining whether the gap distance is within the preset driving distance range also includes: determining whether the gap distance is greater than a first preset gap distance, and in response to the gap distance being greater than the first preset gap distance, sending a first driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to synchronously move toward the edge of the speed measuring toothed disc according to the first driving instruction. The first preset gap distance can be calibrated according to actual conditions.

[0061] Specifically, the installation gap adjustment system of the turbine speed sensor is initialized so that the first probe of the distance sensor and the second probe of the pulse sensor are set at the initial position of the system, that is, the gap distance between the pulse sensor and the edge of the speed measuring gear is greater than or equal to the first preset gap distance. After obtaining the gap distance between the pulse sensor and the edge of the speed measuring sprocket, the gap distance between the pulse sensor and the edge of the speed measuring sprocket is compared with the first preset gap distance to determine whether the gap distance between the pulse sensor and the edge of the speed measuring sprocket is greater than the first preset gap distance. When the gap distance between the pulse sensor and the edge of the speed measuring sprocket is greater than the first preset gap distance, it means that the gap distance between the pulse sensor and the edge of the speed measuring sprocket is too large, and there is a risk of inaccurate pulse signal acquisition or jump. It is necessary to adjust the gap distance between the pulse sensor and the edge of the speed measuring sprocket. At this time, the controller sends a first driving instruction to the driving device, wherein the first driving instruction can be driven toward the edge of the speed measuring sprocket, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring sprocket according to the first driving instruction, that is, the gap distance between the pulse sensor and the edge of the speed measuring sprocket becomes smaller. When the gap distance between the pulse sensor and the edge of the speed measuring sprocket is not greater than the first preset gap distance, the driving device stops driving, so as to ensure that the gap distance between the pulse sensor and the edge of the speed measuring sprocket is within the optimal gap range.

[0062] In some embodiments of the present invention, the drive instruction includes a second drive instruction;

[0063] Determining whether the gap distance is within the preset driving distance range also includes: in response to the gap distance being less than the first preset gap distance, determining whether the gap distance is less than the second preset gap distance, and in response to the gap distance being less than the second preset gap distance, sending a second driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to synchronously move away from the edge of the speed measuring sprocket according to the second driving instruction. The second preset gap distance can be calibrated according to actual conditions.

[0064] Specifically, when the gap distance between the pulse sensor and the edge of the speed measuring sprocket is less than the first preset gap distance, the gap distance between the pulse sensor and the edge of the speed measuring sprocket is compared with the second preset gap distance to determine whether the gap distance between the pulse sensor and the edge of the speed measuring sprocket is less than the second preset gap distance. When the gap distance between the pulse sensor and the edge of the speed measuring sprocket is less than the second preset gap distance, it means that the gap distance between the pulse sensor and the edge of the speed measuring sprocket is too small, and there is a risk of collision between the pulse sensor and the speed measuring sprocket. It is necessary to adjust the gap distance between the pulse sensor and the edge of the speed measuring sprocket. At this time, the controller sends a signal to the drive device. The second driving instruction, wherein the second driving instruction can be driven away from the edge of the speed measuring toothed disc, so that the driving device drives the pulse sensor and the distance sensor to move synchronously away from the edge of the speed measuring toothed disc according to the second driving instruction, that is, the gap distance between the pulse sensor and the edge of the speed measuring toothed disc becomes larger, and when the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is not less than the second preset gap distance, the driving device stops driving, which can ensure that the gap distance between the pulse sensor and the edge of the speed measuring toothed disc is within the optimal gap range, avoid the pulse sensor from colliding with the speed measuring toothed disc, and make the pulse signal output by the pulse sensor stable, continuous and without jumps, thereby ensuring the safe and stable operation of the unit.

[0065] As a specific example, Figure 3 As shown, the flow chart of the control method of the installation gap adjustment system of the turbine speed sensor of the present invention may include the following steps:

[0066] S301, initializing the installation clearance adjustment system of the turbine speed sensor.

[0067] S302, obtaining the gap distance between the pulse sensor and the edge of the speed measuring gear disc.

[0068] S303: Compare the gap distance between the pulse sensor and the edge of the speed measuring sprocket with a first preset gap distance.

[0069] S304, determine whether the gap distance between the pulse sensor and the edge of the speed measuring sprocket is greater than a first preset gap distance. If yes, execute step S305; if not, return to step S302.

[0070] S305: The controller sends a first driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring gear disc according to the first driving instruction.

[0071] S306: When the gap distance between the pulse sensor and the edge of the speed measuring sprocket is smaller than the first preset gap distance, compare the gap distance between the pulse sensor and the edge of the speed measuring sprocket with the second preset gap distance.

[0072] S307, determining whether the gap distance between the pulse sensor and the edge of the speed measuring sprocket is less than a second preset gap distance. If yes, executing step S308; if no, returning to step S302.

[0073] S308: The controller sends a second driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to move synchronously away from the edge of the speed measuring sprocket according to the second driving instruction.

[0074] In summary, the control method of the installation gap adjustment system of the turbine speed sensor according to the embodiment of the present invention includes: obtaining the gap distance between the pulse sensor and the edge of the speed measuring sprocket; determining whether the gap distance is within the preset gap distance range; in response to the gap distance not being within the preset gap distance range, sending a driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring sprocket or away from the edge of the speed measuring sprocket according to the driving instruction. Therefore, this method can solve the problem of abnormalities such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring sprocket and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring sprocket is within the optimal gap range.

[0075] It should be noted that some embodiments of the present invention are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0076] Corresponding to the above-mentioned embodiment, the present invention also proposes a water turbine.

[0077] like Figure 4 As shown, the turbine 400 of the present invention includes: a turbine body 410, the turbine body 410 has a fixed end and a turbine main shaft 10; and an adjustment system 420, the adjustment system 420 is the installation gap adjustment system 100 of the above-mentioned turbine speed sensor, the speed measuring gear disc 20 is fixed on the turbine main shaft 10, and rotates synchronously with the turbine main shaft 10, and the driving device 50 is connected to the fixed end.

[0078] The water turbine according to the embodiment of the present invention can solve the abnormal problems such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring gear disc and the pulse sensor, ensure the safe and stable operation of the unit, extend the service life of the pulse sensor, and ensure that the gap distance between the pulse sensor and the edge of the speed measuring gear disc is within the optimal gap range.

[0079] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present invention also provides a hydro-turbine generator set.

[0080] refer to Figure 5 , is a block diagram of a hydro-generator set according to some embodiments of the present invention, wherein the hydro-generator set 500 includes the above-mentioned turbine 400.

[0081] The hydro-turbine generator set according to the embodiment of the present invention, by including the above-mentioned hydro-turbine, can solve the abnormal problems such as unstable and jumping speed signals of the unit caused by the difficulty in adjusting the gap between the speed measuring gear disc and the pulse sensor, thereby ensuring the safe and stable operation of the unit, extending the service life of the pulse sensor, and ensuring that the gap distance between the pulse sensor and the edge of the speed measuring gear disc is within the optimal gap range.

[0082] In addition, although the operations of the method of the present invention are described in a specific order in the accompanying drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. On the contrary, the steps depicted in the flow chart can be performed in a different order. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step, and / or one step can be decomposed into multiple steps.

[0083] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0084] Although the spirit and principle of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined to benefit, and this division is only for the convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the attached claims. The scope of the attached claims conforms to the broadest interpretation, thereby including all such modifications and equivalent structures and functions.

Claims

1. A system for adjusting the installation gap of a turbine speed sensor, comprising: A speed measuring toothed disc (20), wherein the speed measuring toothed disc (20) is fixed on the main shaft (10) of the water turbine and rotates synchronously with the main shaft; A pulse sensor (30), the pulse sensor (30) being arranged toward an edge of the speed measuring toothed disc (20) and being used to measure a pulse frequency caused by the rotation of the speed measuring toothed disc (20); a distance sensor (40), the distance sensor (40) being arranged towards the edge of the speed measuring toothed disc (20) and being used for measuring the gap distance between the pulse sensor (30) and the edge of the speed measuring toothed disc (20); A driving device (50), the driving device (50) being connected to the pulse sensor (30) and the distance sensor (40); A controller is connected to the pulse sensor (30), the distance sensor (40) and the driving device (50), and is used to send a driving instruction to the driving device (50) according to the gap distance, so that the driving device (50) drives the pulse sensor (30) and the distance sensor (40) to synchronously move toward the edge of the speed measuring toothed disc (20) or move away from the edge of the speed measuring toothed disc (20) according to the driving instruction.

2. The installation gap adjustment system of the turbine speed sensor according to claim 1, characterized in that: Also includes: A power supply module, the power supply module is communicatively connected with the pulse sensor (30), the distance sensor (40), the drive device (50) and the controller, and is used to supply power to the pulse sensor (30), the distance sensor (40), the drive device (50) and the controller.

3. The installation gap adjustment system of the turbine speed sensor according to claim 2 is characterized in that: Also includes: An alarm module is connected to the pulse sensor (30) and the distance sensor (40), and is used to monitor the working state of the pulse sensor (30) according to the pulse frequency, and to monitor the working state of the distance sensor (40) according to the gap distance, and to issue an alarm message in response to an abnormality in the working state of the pulse sensor (30) and / or the distance sensor (40).

4. The installation gap adjustment system of the turbine speed sensor according to claim 3 is characterized in that: The driving device (50) comprises a driving base (51), the driving base (51) being provided with a first limiting area (511) and a second limiting area (512), the pulse sensor (30) being vertically arranged in the first limiting area (511), and the distance sensor (40) being vertically arranged in the second limiting area (512).

5. The installation gap adjustment system of the turbine speed sensor according to claim 4, characterized in that: The pulse sensor (30) is provided with a first probe (31), and the distance sensor (40) is provided with a second probe (41); the first probe (31) is arranged toward an edge of the speed measuring toothed disc (20), and the second probe (41) is arranged toward an edge of the speed measuring toothed disc (20); an end face of the first probe (31) is flush with an end face of the second probe (41).

6. A control method for an installation clearance adjustment system of a turbine speed sensor, characterized in that: The installation clearance adjustment system for the turbine speed sensor according to any one of claims 1 to 5 comprises: Obtain the gap distance between the pulse sensor and the edge of the speed measuring gear disc; Determining whether the gap distance is within a preset gap distance range; In response to the gap distance not being within the preset gap distance range, a driving instruction is sent to the driving device, so that the driving device drives the pulse sensor and the distance sensor to synchronously move toward the edge of the speed measuring toothed disc or away from the edge of the speed measuring toothed disc according to the driving instruction.

7. The control method of the installation clearance adjustment system of the turbine speed sensor according to claim 6, characterized in that: The driving instruction includes a first driving instruction; The determining whether the gap distance is within a preset driving distance range further includes: Determine whether the gap distance is greater than a first preset gap distance, and in response to the gap distance being greater than the first preset gap distance, send the first driving instruction to the driving device, so that the driving device drives the pulse sensor and the distance sensor to move synchronously toward the edge of the speed measuring gear according to the first driving instruction.

8. The control method of the installation clearance adjustment system of the turbine speed sensor according to claim 7, characterized in that: The driving instruction includes a second driving instruction; The determining whether the gap distance is within a preset driving distance range further includes: In response to the gap distance being less than the first preset gap distance, it is determined whether the gap distance is less than a second preset gap distance. In response to the gap distance being less than the second preset gap distance, the second drive instruction is sent to the drive device so that the drive device drives the pulse sensor and the distance sensor to move synchronously away from the edge of the speed measuring sprocket according to the second drive instruction.

9. A water turbine, characterized in that: include: A water turbine body (410), wherein the water turbine body (410) comprises a fixed end and a water turbine main shaft (10); and An adjustment system (420), wherein the adjustment system (420) is an installation clearance adjustment system (100) for a turbine speed sensor according to any one of claims 1 to 5, wherein the speed measuring gear disc (20) is fixed on the turbine main shaft (10) and rotates synchronously with the turbine main shaft (10), and the driving device (50) is connected to the fixed end.

10. A hydro-generator set, characterized in that: Comprising the water turbine (400) as claimed in claim 9.

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