Method and system for optimizing balance degree of thrust pad of water-turbine generator set

Abstract

The invention provides a water-turbine generator set thrust pad balance degree optimization method and system, and the method comprises the steps: synchronously collecting the current dynamic load pad temperature and dynamic load displacement of each thrust pad through an installed sensor when a rotor of a set rotates to any position; according to the dynamic load tile temperature of each thrust tile, calculating a dynamic tile temperature mean value of the thrust tiles of the unit, and detecting whether the thrust tiles exceeding a temperature limit value exist or not; calculating a dynamic load displacement mean value of the thrust pads of the unit according to the dynamic load displacement of each thrust pad, and detecting whether the thrust pads exceeding a load dynamic change limit value exist or not; and sending an alarm under the condition that the thrust pads exceeding the limit value are detected, and calculating an angle adjustment value of dynamic stress of each thrust pad exceeding the limit value. According to the method, the temperature balance and the stress balance of the thrust pad can be comprehensively monitored in real time, the over-limit thrust pad with the problem of poor balance degree is adjusted in time, and operation balance of the thrust pad is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of hydroelectric power generation equipment control, and in particular to a method and system for optimizing the balance of thrust bearings of a hydro-turbine generator set. Background Art

[0002] At present, in the hydro-turbine generator set, the thrust bearing arranged under the mirror plate of the thrust bearing of the unit not only bears the weight of the rotor of the generator set, but also bears the axial water thrust when the unit is running, as well as the heat generated by the friction of the rotor during operation. Therefore, the balance parameters such as the temperature balance and force balance of the thrust bearing during operation are directly related to whether the operation of the unit is safe and reliable. With the continuous increase in the capacity of the single unit of the hydro-turbine generator set, the requirements for the safe, continuous and reliable operation of the unit are getting higher and higher, and whether the balance of the thrust bearing meets the requirements has also attracted more and more attention.

[0003] In the related art, when monitoring the balance of the thrust bearings of a hydropower unit, a temperature sensor is usually installed inside the thrust bearing to measure the bearing temperature of the thrust bearing, and the relevant bearing temperature data of each thrust bearing is manually calculated. When there is an abnormality in the calculated bearing temperature data, it is estimated that the thrust bearing is unevenly stressed.

[0004] However, in the actual operation of the hydro-turbine generator set, the thrust bearing will only show the problem of poor balance through the bearing temperature after it is worn to a certain extent. Therefore, the balance monitoring in the above-mentioned related technologies belongs to post-monitoring, which cannot monitor the problem of poor balance in real time, nor can it effectively monitor the dynamic changes of the load on the thrust bearing of the hydro-turbine generator set in real time. Moreover, the monitored data cannot be used to adjust the balance of the thrust bearing.

[0005] Therefore, how to conduct real-time and comprehensive monitoring of the poor balance of the thrust bearing and make timely adjustments has become an urgent problem that needs to be solved. Summary of the invention

[0006] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0007] To this end, the first purpose of this application is to propose a method for optimizing the balance of thrust bearings of a hydro-turbine generator set, which can monitor the temperature balance and force balance of thrust bearings in real time and comprehensively, and timely adjust the over-limit thrust bearings with poor balance problems, which is beneficial to the operation balance of thrust bearings. The method solves the problem of being unable to monitor the poor balance of thrust bearings in real time during the operation of hydro-turbine generator sets, and the problem of being unable to monitor the dynamic changes of load on the thrust bearings of the unit in real time.

[0008] The second object of the present application is to provide a system for optimizing the balance of thrust bearings of a hydro-generator set;

[0009] The third object of the present application is to provide a device for optimizing the balance of the thrust bearing of a hydro-generator set;

[0010] A fourth objective of the present application is to provide a computer-readable storage medium.

[0011] To achieve the above-mentioned purpose, the first aspect of the present application is to propose a method for optimizing the balance of the thrust bearing of a hydro-turbine generator set, the method comprising the following steps:

[0012] A bearing temperature sensor and a micro displacement sensor are installed at the corresponding position of each thrust bearing. When the rotor of the hydro-generator unit rotates to any position, the current dynamic load bearing temperature and dynamic load displacement of each thrust bearing are synchronously collected through the installed sensors.

[0013] According to the dynamic load bearing temperature of each thrust bearing, an average value of the dynamic bearing temperature of the thrust bearings in the computer group is calculated, and based on the average value of the dynamic bearing temperature and the dynamic load bearing temperature of each thrust bearing, it is detected whether there is a thrust bearing that exceeds the temperature limit;

[0014] According to the dynamic load displacement and no-load load displacement of each thrust washer, a dynamic load displacement average of the thrust washer in the computer group is calculated, and based on the dynamic load displacement average, whether there is a thrust washer that exceeds the load dynamic change limit value;

[0015] When a thrust washer exceeding the limit is detected, an alarm signal is sent, and an angle adjustment value of the dynamic force of each thrust washer exceeding the limit is calculated based on the dynamic load displacement mean value.

[0016] Optionally, according to one embodiment of the present application, the detection of whether there is a thrust bearing that exceeds the temperature limit based on the dynamic bearing temperature average and the dynamic load bearing temperature of each thrust bearing includes: calculating a first difference between the dynamic load bearing temperature of each thrust bearing and the dynamic bearing temperature average; comparing the dynamic load bearing temperatures of all thrust bearings to determine a maximum bearing temperature and a minimum bearing temperature, and calculating a second difference between the maximum bearing temperature and the minimum bearing temperature; and comparing the first difference and the second difference with the temperature limit.

[0017] Optionally, according to one embodiment of the present application, the dynamic load displacement mean of the thrust bearings in the computer group includes: subtracting the corresponding no-load load displacement from the dynamic load displacement of each thrust bearing to obtain the dynamic load displacement value of each thrust bearing; calculating the dynamic load displacement mean of the thrust bearings in the unit based on the dynamic load displacement values ​​of all thrust bearings; detecting whether there are thrust bearings that exceed the load dynamic change limit based on the dynamic load displacement mean, includes: respectively calculating the third difference between the dynamic load displacement value of each thrust bearing and the dynamic load displacement mean, and comparing the third difference with the load dynamic change limit.

[0018] Optionally, according to one embodiment of the present application, after obtaining the dynamic load displacement value of each thrust washer, it also includes: calculating the dynamic load stress value of each thrust washer according to the dynamic load displacement value of each thrust washer; calculating the dynamic load stress average of the computer group according to the dynamic load stress values ​​of all thrust washer; calculating the fourth difference between the dynamic load stress value of each thrust washer and the dynamic load stress average of the unit, comparing the fourth difference with the load dynamic change limit, and detecting whether there is a thrust washer that exceeds the limit.

[0019] Optionally, according to one embodiment of the present application, the dynamic load force value of each thrust washer is calculated by the following formula:

[0020]

[0021] Among them, F i D is the dynamic load value of the i-th thrust pad, F is the total tonnage of the unit rotor, n is the number of thrust pads, l i D is the dynamic load displacement value of the i-th thrust washer.

[0022] Optionally, according to one embodiment of the present application, the calculation of the angle adjustment value of the dynamic force of each over-limit thrust washer based on the dynamic load displacement mean includes: calculating the fifth difference between the dynamic load displacement value of each over-limit thrust washer and the dynamic load displacement mean; and calculating the angle adjustment value corresponding to each over-limit thrust washer based on the fifth difference and the pitch of the pillar bolt.

[0023] Optionally, according to one embodiment of the present application, the installation of a bearing temperature sensor and a micro-displacement sensor at a corresponding position of each thrust bearing comprises: installing the bearing temperature sensor on the central axis inside each thrust bearing, and installing the micro-displacement sensor on the bearing bracket mounting component of each thrust bearing, wherein the central axis of each thrust bearing, the axis of the bearing bracket and the axis of the corresponding micro-displacement sensor are located on the same vertical line.

[0024] To achieve the above-mentioned purpose, the second aspect of the present application further proposes a system for optimizing the balance of thrust bearings of a hydro-turbine generator set, comprising:

[0025] The first acquisition unit is used to acquire the no-load load displacement of each thrust pad when the hydro-generator set is not loaded;

[0026] The second acquisition unit is used to acquire the static load displacement of each thrust pad when the hydro-generator set is loaded with all preset loads;

[0027] The third acquisition unit is used to synchronously acquire the dynamic load bearing temperature of each thrust bearing when the unit is running;

[0028] A fourth acquisition unit is used to synchronously acquire the dynamic load displacement of each thrust pad when the unit is running;

[0029] A calculation unit, used for calculating the difference between various dynamic load bearing temperature related data and various dynamic load displacement related data of each thrust bearing and the corresponding mean value according to various collected data;

[0030] A judging unit, used for comparing the plurality of said differences with corresponding preset limits, and judging whether there is a thrust washer exceeding the limit;

[0031] The alarm unit is used to send an alarm signal and calculate the angle adjustment value of the dynamic force of each thrust washer that exceeds the limit when the thrust washer is detected.

[0032] To achieve the above-mentioned purpose, the third aspect of the present application further proposes a device for optimizing the balance of thrust bearings of a hydro-turbine generator set, comprising the following modules:

[0033] The acquisition module is used to install a bearing temperature sensor and a micro-displacement sensor at the corresponding position of each thrust bearing. When the rotor of the hydro-generator unit rotates to any position, the current dynamic load bearing temperature and dynamic load displacement of each thrust bearing are synchronously acquired through the installed sensors;

[0034] A first detection module is used to calculate the average dynamic bearing temperature of thrust bearings in the computer group according to the dynamic load bearing temperature of each thrust bearing, and detect whether there is a thrust bearing that exceeds the temperature limit based on the dynamic bearing temperature average and the dynamic load bearing temperature of each thrust bearing;

[0035] A second detection module is used to calculate the average value of the dynamic load displacement of the thrust bearings in the computer group according to the dynamic load displacement and no-load load displacement of each thrust bearing, and based on the dynamic load displacement average value, detect whether there is a thrust bearing that exceeds the load dynamic change limit;

[0036] The adjustment module is used to send an alarm signal when a thrust washer exceeding the limit is detected, and calculate the angle adjustment value of the dynamic force of each thrust washer exceeding the limit based on the dynamic load displacement mean.

[0037] To achieve the above-mentioned purpose, the fourth aspect of the present application further proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the method for optimizing the balance degree of the thrust bearing of a hydro-turbine generator set described in any one of the above-mentioned first aspects is implemented.

[0038] The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: the present application realizes online monitoring of the dynamic load of the thrust bearing by monitoring the dynamic bearing temperature and dynamic load displacement of the thrust bearing, reflects the change of the dynamic load by the change of the dynamic load displacement, and judges whether there is a problem of poor balance by synchronously comparing the load displacement and / or the dynamic load force value according to the dynamic bearing temperature of the thrust bearing. It can realize online monitoring and judgment of the problem of poor balance, and the whole monitoring process, data calculation process and balance adjustment process are completed synchronously without manual participation, thereby improving the real-time, accuracy and intelligence of the optimization of the balance of the thrust bearing. Moreover, when installing the monitoring equipment, each thrust bearing axis, the corresponding bearing bracket axis and the corresponding displacement sensor axis are all on the same vertical line, ensuring the verticality of the displacement sensor installation, and at the same time, the measured displacement values ​​of all displacement sensors and bearing temperature sensors are obtained synchronously, avoiding the problem of poor timeliness caused by time differences, avoiding the influence of human factors on the measurement, and greatly improving the installation accuracy. Therefore, the present application can conduct real-time, comprehensive and accurate monitoring of the temperature balance and force balance of the thrust washer, and timely adjust the over-limit thrust washer with poor balance problems, which is beneficial to ensuring the reliability of the balanced operation of the thrust washer.

[0039] 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

[0040] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0041] Figure 1 A flow chart of a method for optimizing the balance of a thrust bearing of a hydro-turbine generator set proposed in an embodiment of the present application;

[0042] Figure 2 A schematic diagram of a sensor installation method proposed in an embodiment of the present application;

[0043] Figure 3 A flowchart of a specific method for optimizing the balance of a thrust bearing of a hydro-turbine generator set proposed in an embodiment of the present application;

[0044] Figure 4 A schematic diagram of the structure of a system for optimizing the balance of thrust bearings of a hydro-turbine generator set proposed in an embodiment of the present application;

[0045] Figure 5 A schematic diagram of a data transmission method in a system proposed in an embodiment of the present application;

[0046] Figure 6 A schematic diagram of the structure of a device for optimizing the balance of thrust bearings of a hydro-turbine generator set proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0048] It should be noted that in the relevant embodiments, the thrust bearing thrust bearing temperature balance is monitored by installing a temperature sensor in each thrust bearing to measure the thrust bearing temperature. After all the readings are obtained, the temperatures of all thrust bearings are added and then divided by the number of thrust bearings in the unit to calculate the average temperature of all thrust bearings. The difference between the temperature of each thrust bearing and the average temperature is then calculated to estimate whether the thrust bearing is evenly stressed.

[0049] However, in the actual operation of the hydro-turbine generator set, the thrust bearing will only show the problem of poor balance through the bearing temperature after it is worn to a certain extent. The above monitoring method belongs to post-monitoring, which cannot monitor the problem of poor balance in real time, nor can it effectively monitor the dynamic changes of the load on the thrust bearing of the hydro-turbine generator set in real time. At the same time, the difference between the bearing temperature of each thrust bearing and the mean bearing temperature cannot specifically correspond to the relationship between its force and the average force deviation, and can only provide a directional hint, which has no specific guiding role for the subsequent thrust bearing balance adjustment of the unit to reduce the bearing temperature deviation.

[0050] To this end, the present application proposes a method and system for optimizing the balance of thrust bearings of a hydro-turbine generator set, which performs real-time and comprehensive monitoring of the temperature balance and force balance of the thrust bearings, and timely adjusts over-limit thrust bearings with poor balance problems.

[0051] A method, system and device for optimizing the balance of a thrust bearing of a hydro-turbine generator set according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0052] Figure 1 A flow chart of a method for optimizing the balance of a thrust bearing of a hydro-turbine generator set proposed in an embodiment of the present application, such as Figure 1 As shown, the method comprises the following steps:

[0053] Step S101: Install a bearing temperature sensor and a micro-displacement sensor at the corresponding position of each thrust bearing. When the rotor of the hydro-generator set rotates to any position, the installed sensors synchronously collect the current dynamic load bearing temperature and dynamic load displacement of each thrust bearing.

[0054] Specifically, the present application pre-installs a corresponding thrust washer temperature sensor and a micro displacement sensor on each thrust washer of a hydro-turbine generator set (hereinafter referred to as a unit), so as to collect the temperature value of the corresponding thrust washer through the temperature sensor and collect the displacement value of the corresponding thrust washer through the micro displacement sensor. Since there are multiple thrust washer in the unit, the installation method of the sensor needs to ensure the accuracy and synchronization of data collection.

[0055] In one embodiment of the present application, a bearing temperature sensor and a micro-displacement sensor are installed at corresponding positions of each thrust bearing, including: installing a bearing temperature sensor on the central axis inside each thrust bearing, and installing a micro-displacement sensor on the bearing bracket mounting component of each thrust bearing, wherein the central axis of each thrust bearing, the axis of the bearing bracket and the axis of the corresponding micro-displacement sensor are located on the same vertical line.

[0056] Specifically, if Figure 2 As shown, for each thrust washer 1, a washer temperature sensor 3 is installed at the position of its internal central axis, and a micro-displacement sensor 4 is installed on the mounting component of the bearing bracket 2 corresponding to the thrust washer. Each thrust washer corresponds to the temperature sensor and the displacement sensor one by one, and the axis of each thrust washer, the axis of the bearing bracket corresponding to the thrust washer, and the axis of the displacement sensor corresponding to the bearing bracket are all in the same straight line.

[0057] Moreover, in the present embodiment, the measured displacement value of the micro-displacement sensor is obtained during the installation process of each micro-displacement sensor. When the measured displacement value is one quarter of the measuring range of the displacement sensor ±0.3 mm, the micro-displacement sensor is fixedly installed, thereby ensuring that the measuring range of the micro-displacement sensor can meet the displacement value measurement requirements when the rotor rotates to any position during actual operation of the unit.

[0058] Therefore, the embodiment of the present application ensures the verticality of the displacement sensor installation by ensuring that each thrust washer axis, the corresponding bearing bracket axis, and the corresponding displacement sensor axis are on the same vertical line during installation. At the same time, based on the same installation method of each thrust washer, the measured displacement values ​​of all displacement sensors and bearing temperature sensors are acquired synchronously, avoiding the problem of poor timeliness caused by time differences, avoiding the influence of human factors on measurement, and improving the accuracy of data detection.

[0059] Furthermore, based on the above-mentioned installation method, during the actual operation of the unit, when the rotor rotates to any position, the dynamic load bearing temperature and dynamic load displacement of each thrust bearing when the rotor rotates to this position can be synchronously obtained through the bearing temperature sensors and micro-displacement sensors installed on each thrust bearing.

[0060] Step S102: According to the dynamic load bearing temperature of each thrust bearing, the average dynamic bearing temperature of the thrust bearings in the computer group is calculated, and based on the average dynamic bearing temperature and the dynamic load bearing temperature of each thrust bearing, it is detected whether there is a thrust bearing that exceeds the temperature limit.

[0061] It should be noted that the present application realizes online monitoring of the dynamic load of the thrust bearing by monitoring the dynamic bearing temperature and dynamic load displacement of the thrust bearing, and judges whether there is a poor balance problem according to the dynamic bearing temperature of the thrust bearing synchronously comparing the load displacement, so as to realize online monitoring and judgment of the poor balance problem. First, detect whether the dynamic load bearing temperature of each thrust bearing exceeds the limit value.

[0062] Specifically, the average dynamic bearing temperature of all thrust bearings in the unit is calculated according to the dynamic load bearing temperature of each thrust bearing, and then based on the average dynamic bearing temperature and the dynamic load bearing temperature of each thrust bearing, multiple temperature differences are calculated according to actual needs to determine from multiple angles whether there are thrust bearings that exceed the temperature limit.

[0063] In one embodiment of the present application, based on the dynamic bearing temperature average and the dynamic load bearing temperature of each thrust bearing, it is detected whether there is a thrust bearing that exceeds the temperature limit, including: calculating the first difference between the dynamic load bearing temperature of each thrust bearing and the dynamic bearing temperature average; comparing the dynamic load bearing temperatures of all thrust bearings, determining the maximum bearing temperature and the minimum bearing temperature, and calculating the second difference between the maximum bearing temperature and the minimum bearing temperature; comparing the first difference and the second difference with the temperature limit.

[0064] Specifically, the dynamic bearing temperature average of the unit thrust bearing can be calculated according to the dynamic load bearing temperature of each thrust bearing by the following formula:

[0065]

[0066] in, is the dynamic watt temperature average, T i J is the dynamic load bearing temperature of the i-th thrust bearing, and n is the number of thrust bearings.

[0067] Then, the dynamic load bearing temperature of each thrust bearing is subtracted from the obtained dynamic bearing temperature average, and the first difference between the dynamic load bearing temperature of each thrust bearing and the dynamic bearing temperature average is calculated.

[0068] Then, the dynamic load bearing temperatures of each thrust bearing are compared, the maximum and minimum bearing temperatures are determined from the dynamic load bearing temperatures of all thrust bearings, and the second difference between the maximum bearing temperature and the minimum bearing temperature is calculated. The obtained second difference and the first difference of each thrust bearing are respectively compared with the preset temperature limit, and the thrust bearing whose difference exceeds the temperature limit is determined as an over-limit thrust bearing with abnormal temperature balance (which may be referred to as an over-limit thrust bearing).

[0069] Step S103: According to the dynamic load displacement and no-load load displacement of each thrust washer, the dynamic load displacement average of the thrust washer in the computer group is calculated, and based on the dynamic load displacement average, it is detected whether there is a thrust washer that exceeds the load dynamic change limit.

[0070] Specifically, as described above, the present application also realizes online monitoring of the dynamic load of the thrust washer by monitoring the dynamic load displacement, and the change of the dynamic load of the thrust washer is fed back and represented by the change of the dynamic load displacement, so as to determine whether there is a thrust washer with a poor force balance problem. Specifically, the dynamic load displacement of each thrust washer can be calculated first, and then the dynamic load displacement average of the thrust washer in the unit can be calculated, and then the dynamic load displacement of each thrust washer can be subtracted from the dynamic load displacement average to detect whether there is a thrust washer that exceeds the load dynamic change limit.

[0071] In one embodiment of the present application, the dynamic load displacement average of the thrust bearings in the computer group includes: subtracting the corresponding no-load load displacement from the dynamic load displacement of each thrust bearing to obtain the dynamic load displacement value of each thrust bearing; and calculating the dynamic load displacement average of the thrust bearings in the unit based on the dynamic load displacement values ​​of all thrust bearings.

[0072] Specifically, in this embodiment, before the unit is not in operation, the no-load load displacement of each thrust washer is recorded, and then the dynamic load displacement detected in real time by each thrust washer is subtracted from the corresponding existing no-load load displacement to obtain the dynamic load displacement value of each thrust washer. That is, the dynamic load displacement value of each thrust washer can be calculated by the following formula:

[0073]

[0074] in, is the dynamic load displacement value of the ith thrust pad, is the dynamic load displacement of the ith thrust pad, is the no-load displacement of the ith thrust pad when it is unloaded.

[0075] Furthermore, the dynamic load displacement mean of the thrust bearing in the unit is calculated by the following formula:

[0076]

[0077] in, is the mean dynamic load displacement and n is the number of thrust pads.

[0078] Furthermore, in this embodiment, based on the dynamic load displacement mean, it is detected whether there are thrust washers that exceed the load dynamic change limit, including: calculating the third difference between the dynamic load displacement value and the dynamic load displacement mean of each thrust washers, and comparing the third difference with the load dynamic change limit.

[0079] Specifically, the third difference of each thrust washer is compared with the preset load dynamic change limit, and the thrust washer whose difference exceeds the load dynamic change limit is determined as a thrust washer with abnormal dynamic load change (this type of thrust washer is also detected as an over-limit thrust washer).

[0080] In order to improve the comprehensiveness of the detection of poor balance problems and fully consider the dynamic load changes from all angles, in one embodiment of the present application, the dynamic load force values ​​of each thrust washer can also be synchronously compared to determine whether there is a poor force balance problem. Specifically, after obtaining the dynamic load displacement value of each thrust washer, it also includes: calculating the dynamic load force value of each thrust washer according to the dynamic load displacement value of each thrust washer; calculating the dynamic load force average of the computer group according to the dynamic load force values ​​of all thrust washer; calculating the fourth difference between the dynamic load force value of each thrust washer and the dynamic load force average of the unit, comparing the fourth difference with the load dynamic change limit, and detecting whether there is a thrust washer that exceeds the limit.

[0081] Specifically, in this embodiment, the dynamic load force value of each thrust washer is first calculated according to the dynamic load displacement value of each thrust washer. Specifically, the dynamic load force value of each thrust washer can be calculated by the following formula:

[0082]

[0083] Among them, F i D is the dynamic load value of the i-th thrust pad, F is the total tonnage of the unit rotor, n is the number of thrust pads, is the dynamic load displacement value of the i-th thrust pad.

[0084] Furthermore, after calculating the dynamic load stress value of each thrust washer according to the dynamic load displacement value of each thrust washer, the average dynamic load stress value of the unit can be calculated by averaging; then, the dynamic load stress value of each thrust washer is subtracted from the average dynamic load stress value of the unit to calculate the fourth difference between the dynamic load stress value of each thrust washer and the average dynamic load stress value of the unit. Finally, the fourth difference value corresponding to each thrust washer is compared with the preset load dynamic change limit value described in the above embodiment, and the thrust washer whose fourth difference value exceeds the load dynamic change limit value is also determined as a thrust washer with abnormal dynamic load change.

[0085] Step S104: When a thrust washer exceeding the limit is detected, an alarm signal is sent, and an angle adjustment value of the dynamic force of each thrust washer exceeding the limit is calculated based on the dynamic load displacement mean.

[0086] Specifically, in the above steps S102 and S103, through various detection and judgment logics, if an over-limit thrust washer is detected that exceeds the temperature limit and the load dynamic change limit, an alarm signal can be sent when an abnormality is detected to remind relevant staff that there is an abnormal balance problem, and the angle adjustment value of the dynamic force of each over-limit thrust washer can be calculated based on the calculated data including the above-mentioned dynamic load displacement mean.

[0087] In one embodiment of the present application, the angle adjustment value of the dynamic force of each over-limit thrust washer is calculated based on the dynamic load displacement mean, including: calculating the fifth difference between the dynamic load displacement value of each over-limit thrust washer and the dynamic load displacement mean; based on the fifth difference and the pitch of the support bolt, calculating the angle adjustment value corresponding to each over-limit thrust washer.

[0088] Specifically, for different types of over-limit thrust bearings with over-limit temperature and over-limit force, corresponding adjustment methods can be adopted according to actual conditions. For example, in step S102, if the second difference between the maximum bearing temperature and the minimum bearing temperature exceeds the temperature limit, the adjustment angle value for the thrust bearing with the maximum bearing temperature can be calculated by the following formula:

[0089]

[0090] Among them, a max is the adjustment angle value corresponding to the thrust bearing when the bearing temperature is the maximum value, s is the pitch of the support bolt, is the dynamic load displacement value of the thrust bearing when the bearing temperature is the maximum value, is the dynamic load displacement mean.

[0091] The adjustment angle value of the thrust bearing with the minimum bearing temperature can be calculated by the following formula:

[0092]

[0093] Among them, a min The temperature of the bearing is the adjustment angle value corresponding to the minimum thrust bearing, s is the pitch of the support bolt, It is the dynamic load displacement value of the thrust bearing when the bearing temperature is the minimum.

[0094] Furthermore, the corresponding over-limit thrust washer is adjusted according to the calculated angle adjustment value so as to optimize the balance of the over-limit thrust washer and eliminate the problem of abnormal balance.

[0095] If there is no thrust washer that exceeds the limit, or after the corresponding thrust washer that exceeds the limit is adjusted according to the calculated angle adjustment value, the subsequent dynamic continuous monitoring is continued, that is, when the rotor of the hydro-turbine generator set rotates to the next position, the next round of optimization procedure is continued in the manner described in steps S101 to S104 above.

[0096] In order to more clearly and intuitively illustrate the specific implementation process of the method for optimizing the balance of the thrust bearing of the present application, a specific implementation process is described in an embodiment of the present application. Figure 3 A flowchart of a specific method for optimizing the balance of thrust bearings of a hydro-turbine generator set proposed in an embodiment of the present application.

[0097] like Figure 3 The method comprises the following steps: when the unit is running, synchronously obtaining the dynamic load bearing temperature and dynamic load displacement of each thrust bearing when the rotor rotates to a certain position; calculating the average dynamic bearing temperature of the unit thrust bearing according to the dynamic load bearing temperature of each thrust bearing; calculating the difference between the average dynamic bearing temperature and the dynamic load bearing temperature of each thrust bearing; comparing the difference between the maximum and minimum values ​​of the dynamic load bearing temperature of the corresponding thrust bearing and the difference with the average dynamic load bearing temperature to see whether it exceeds the temperature limit; if it exceeds the limit, issuing an alarm; calculating the average dynamic load displacement of the unit thrust bearing, the dynamic load displacement value of each thrust bearing and the difference between the dynamic load displacement and the average according to the no-load load displacement value and dynamic load displacement of the unit thrust bearing; if an alarm occurs, calculating the adjustment angle value of the dynamic force of the corresponding over-limit thrust bearing; otherwise, continuing continuous monitoring.

[0098] In summary, the method for optimizing the balance of the thrust bearing of the hydro-turbine generator set of the embodiment of the present application realizes online monitoring of the dynamic load of the thrust bearing by monitoring the dynamic bearing temperature and dynamic load displacement of the thrust bearing, reflects the change of the dynamic load by the change of the dynamic load displacement, and judges whether there is a problem of poor balance by synchronously comparing the load displacement and / or the dynamic load force value according to the dynamic bearing temperature of the thrust bearing. It is possible to realize online monitoring and judgment of the problem of poor balance, and the entire monitoring process, data calculation process and balance adjustment process are completed synchronously without manual participation, thereby improving the real-time, accuracy and intelligence of the optimization of the balance of the thrust bearing. Therefore, the method can monitor the temperature balance and force balance of the thrust bearing in real time, comprehensively and accurately, and timely adjust the over-limit thrust bearing with poor balance problem, which is conducive to ensuring the reliability of the balanced operation of the thrust bearing.

[0099] In order to realize the above-mentioned embodiment, the present application also proposes a system for optimizing the balance of thrust bearings of a hydro-turbine generator set. Figure 4 The schematic diagram of the structure of a system for optimizing the balance of thrust bearings of a hydro-turbine generator set proposed in the embodiment of the present application is as follows: Figure 4 As shown, the system includes:

[0100] The first acquisition unit is used to synchronously acquire the measured displacement values ​​of all displacement sensors when the unit frame is not loaded, so as to obtain the no-load load displacement of each thrust washer when no load is loaded.

[0101] The second acquisition unit is used to synchronously acquire the measured displacement values ​​of all displacement sensors when the unit frame is loaded with the full load, so as to obtain the static load displacement of each thrust washer when the load is loaded.

[0102] The third acquisition unit is used to synchronously acquire the measured temperature values ​​of all the bearing temperature sensors when the unit is running, so as to obtain the dynamic load bearing temperature of each thrust bearing.

[0103] The fourth acquisition unit is used to synchronously acquire the measured displacement values ​​of all displacement sensors when the unit is running, so as to obtain the dynamic load displacement of each thrust washer.

[0104] The calculation unit is used to calculate the difference between various dynamic load bearing temperature related data and various dynamic load displacement related data of each thrust bearing and the corresponding mean value according to various types of collected data.

[0105] Specifically, the calculation unit can be used to calculate the dynamic load displacement value of each thrust bearing according to the no-load load displacement value and the dynamic load displacement value, and calculate the dynamic load displacement mean of the unit; calculate the dynamic displacement mean difference of each thrust bearing according to the dynamic load displacement value of each thrust bearing and the dynamic load displacement mean of the unit; calculate the dynamic load force value of each thrust bearing according to the dynamic load displacement value of each thrust bearing, and calculate the dynamic load force mean of the unit; calculate the dynamic load mean difference of each thrust bearing according to the dynamic load force value of each thrust bearing and the dynamic load force mean of the unit; calculate the dynamic bearing temperature mean of the unit thrust bearing according to the dynamic load bearing temperature of each thrust bearing; calculate the dynamic bearing temperature mean difference of each thrust bearing according to the dynamic load bearing temperature of each thrust bearing and the dynamic bearing temperature mean of the unit thrust bearing.

[0106] The judging unit is used to compare the multiple differences calculated by the calculating unit with the corresponding preset limits respectively, and judge whether there is a thrust washer exceeding the limit.

[0107] The alarm unit is used to send an alarm signal and calculate the angle adjustment value of the dynamic force of each thrust washer that exceeds the limit when the thrust washer is detected.

[0108] It should be noted that if Figure 4 As shown, the optimization system also includes a bearing temperature sensor and a position sensor. These two sensors, namely the bearing temperature sensor and the micro-displacement sensor installed in step S101 of the above method embodiment, represent a collection of sensors installed on each thrust bearing. The specific sensor installation process is the same as the sensor installation method described in step S101, and will not be repeated here.

[0109] In one embodiment of the present application, the data transmission method of the optimization system of the thrust bearing balance of the hydro-turbine generator set in actual application is as follows: Figure 5 shown.

[0110] Specifically, the watt temperature sensor and the micro displacement sensor are Figure 2 After installation, the sensor data is sent to the corresponding transmitter through optical fiber for data conversion (in this example, 16 sensors of each type are set for exemplary explanation). The transmitter data is then sent to the front end device for collection through optical fiber, and finally sent to the system monitoring host through optical fiber for data processing. The system monitoring host can be set up in the background remote monitoring center.

[0111] In summary, in the optimization system for the balance of the thrust bearing of the hydro-turbine generator set of the embodiment of the present application, when installing the monitoring equipment, each thrust bearing axis, the corresponding bearing bracket axis and the corresponding displacement sensor axis are all on the same vertical line, ensuring the verticality of the displacement sensor installation, and at the same time, the measured displacement values ​​of all displacement sensors and bearing temperature sensors are obtained synchronously, avoiding the problem of poor timeliness caused by time differences, avoiding the influence of human factors on the measurement, and greatly improving the installation accuracy. The system can monitor the temperature balance and force balance of the thrust bearing in real time, comprehensively and accurately, and timely adjust the over-limit thrust bearing with poor balance problems, which is conducive to ensuring the reliability of the balanced operation of the thrust bearing.

[0112] In order to realize the above-mentioned embodiment, the present application also proposes a device for optimizing the balance of thrust bearings of a hydro-turbine generator set. Figure 6 The schematic diagram of the structure of a device for optimizing the balance of thrust bearings of a hydro-turbine generator set proposed in the embodiment of the present application is as follows: Figure 6 As shown, the device includes a collection module 100 , a first detection module 200 , a second detection module 300 and an adjustment module 400 .

[0113] Among them, the collection module 100 is used to install a bearing temperature sensor and a micro-displacement sensor at the corresponding position of each thrust bearing. When the rotor of the hydro-turbine generator set rotates to any position, the current dynamic load bearing temperature and dynamic load displacement of each thrust bearing are synchronously collected through the installed sensors.

[0114] The first detection module 200 is used to calculate the average dynamic bearing temperature of the thrust bearings in the computer group according to the dynamic load bearing temperature of each thrust bearing, and based on the dynamic bearing temperature average and the dynamic load bearing temperature of each thrust bearing, detect whether there is a thrust bearing that exceeds the temperature limit.

[0115] The second detection module 300 is used to calculate the average dynamic load displacement of the thrust bearings in the computer group according to the dynamic load displacement and no-load load displacement of each thrust bearing, and based on the dynamic load displacement average, detect whether there is a thrust bearing that exceeds the load dynamic change limit.

[0116] The adjustment module 400 is used to send an alarm signal when a thrust washer exceeding the limit is detected, and calculate the angle adjustment value of the dynamic force of each thrust washer exceeding the limit based on the dynamic load displacement mean.

[0117] It should be noted that the relevant description of the aforementioned embodiment of the method for optimizing the balance of the thrust bearing of a hydro-turbine generator set is also applicable to the optimization device of this embodiment, and the implementation process is the same. The various modules behind the optimization device can correspond to the various related functions in the above-mentioned method embodiment, which will not be repeated here.

[0118] In summary, the device for optimizing the balance of the thrust bearing of a hydro-turbine generator set according to the embodiment of the present application can perform real-time, comprehensive and accurate monitoring of the temperature balance and force balance of the thrust bearing, and timely adjust the over-limit thrust bearing with poor balance problems, which is beneficial to ensuring the reliability of the balanced operation of the thrust bearing.

[0119] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, it implements the method for optimizing the balance of the thrust bearing of a hydro-turbine generator set as described in any of the above-mentioned first aspect embodiments.

[0120] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0121] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0122] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0123] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0124] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0125] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0126] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0127] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for optimizing the balance of thrust bearings of a hydro-turbine generator set, characterized in that: The method comprises the following steps: A bearing temperature sensor and a micro displacement sensor are installed at the corresponding position of each thrust bearing. When the rotor of the hydro-generator unit rotates to any position, the current dynamic load bearing temperature and dynamic load displacement of each thrust bearing are synchronously collected through the installed sensors. According to the dynamic load bearing temperature of each thrust bearing, an average value of the dynamic bearing temperature of the thrust bearings in the computer group is calculated, and based on the average value of the dynamic bearing temperature and the dynamic load bearing temperature of each thrust bearing, it is detected whether there is a thrust bearing that exceeds the temperature limit; According to the dynamic load displacement and no-load load displacement of each thrust washer, a dynamic load displacement average of the thrust washer in the computer group is calculated, and based on the dynamic load displacement average, whether there is a thrust washer that exceeds the load dynamic change limit value; When a thrust washer exceeding the limit is detected, an alarm signal is sent, and an angle adjustment value of the dynamic force of each thrust washer exceeding the limit is calculated based on the dynamic load displacement mean value.

2. The method according to claim 1, characterized in that The detecting whether there is a thrust washer exceeding a temperature limit based on the dynamic washer temperature average and the dynamic load washer temperature of each thrust washer comprises: Calculate the first difference between the dynamic load bearing temperature and the dynamic bearing temperature average of each thrust bearing respectively; Comparing the dynamic load bearing temperatures of all thrust bearings, determining a maximum bearing temperature and a minimum bearing temperature, and calculating a second difference between the maximum bearing temperature and the minimum bearing temperature; The first difference and the second difference are compared to the temperature limit.

3. The method according to claim 1, characterized in that The dynamic load displacement mean of the thrust pad in the computer group includes: Subtract the corresponding no-load load displacement from the dynamic load displacement of each thrust washer to obtain a dynamic load displacement value of each thrust washer; Calculating the average value of the dynamic load displacement of the thrust bearings in the unit according to the dynamic load displacement values ​​of all thrust bearings; The detecting whether there is a thrust washer exceeding the load dynamic change limit value based on the dynamic load displacement mean value comprises: A third difference between the dynamic load displacement value and the dynamic load displacement mean value of each thrust pad is calculated respectively, and the third difference is compared with the load dynamic change limit value.

4. The method according to claim 3, characterized in that After obtaining the dynamic load displacement value of each thrust pad, the method further includes: Calculating the dynamic load force value of each thrust washer according to the dynamic load displacement value of each thrust washer; According to the dynamic load stress values ​​of all thrust bearings, a mean value of the dynamic load stress of the computer group is calculated; The fourth difference between the dynamic load stress value of each thrust washer and the average dynamic load stress value of the unit is calculated respectively, and the fourth difference is compared with the load dynamic change limit to detect whether there is a thrust washer that exceeds the limit.

5. The method according to claim 4, characterized in that The dynamic load force value of each thrust pad is calculated by the following formula: Among them, F i D is the dynamic load value of the i-th thrust pad, F is the total tonnage of the unit rotor, n is the number of thrust pads, is the dynamic load displacement value of the i-th thrust washer.

6. The method according to claim 3, characterized in that The step of calculating the angle adjustment value of the dynamic force of each over-limit thrust washer based on the dynamic load displacement mean value includes: calculating a fifth difference between the dynamic load displacement value and the dynamic load displacement mean value of each over-limit thrust pad; Based on the fifth difference and the thread pitch of the strut bolt, the angle adjustment value corresponding to each over-limit thrust washer is calculated.

7. The method according to claim 1, characterized in that The tile temperature sensor and the micro displacement sensor are installed at the corresponding position of each thrust tile, including: The bearing temperature sensor is installed on the central axis inside each thrust bearing, and the micro-displacement sensor is installed on the bearing bracket mounting component of each thrust bearing, wherein the central axis of each thrust bearing, the axis of the bearing bracket and the axis of the corresponding micro-displacement sensor are located on the same vertical line.

8. A system for optimizing the balance of thrust bearings of a hydro-turbine generator set, characterized in that: include: A first acquisition unit is used to acquire the no-load load displacement of each thrust pad when the hydro-generator set is not loaded; The second acquisition unit is used to acquire the static load displacement of each thrust pad when the hydro-generator set is loaded with all preset loads; The third acquisition unit is used to synchronously acquire the dynamic load bearing temperature of each thrust bearing when the unit is running; A fourth acquisition unit is used to synchronously acquire the dynamic load displacement of each thrust pad when the unit is running; A calculation unit, used for calculating the difference between various dynamic load bearing temperature related data and various dynamic load displacement related data of each thrust bearing and the corresponding mean value according to various types of collected data; A judging unit, used for comparing the plurality of said differences with corresponding preset limits, and judging whether there is a thrust washer exceeding the limit; The alarm unit is used to send an alarm signal and calculate the angle adjustment value of the dynamic force of each thrust washer that exceeds the limit when a thrust washer that exceeds the limit is detected.

9. A device for optimizing the balance of thrust bearings of a hydro-turbine generator set, characterized in that: Includes the following modules: The acquisition module is used to install a bearing temperature sensor and a micro-displacement sensor at the corresponding position of each thrust bearing. When the rotor of the hydro-generator unit rotates to any position, the current dynamic load bearing temperature and dynamic load displacement of each thrust bearing are synchronously acquired through the installed sensors; A first detection module is used to calculate the average dynamic bearing temperature of thrust bearings in the computer group according to the dynamic load bearing temperature of each thrust bearing, and detect whether there is a thrust bearing that exceeds the temperature limit based on the dynamic bearing temperature average and the dynamic load bearing temperature of each thrust bearing; A second detection module is used to calculate the average value of the dynamic load displacement of the thrust bearings in the computer group according to the dynamic load displacement and no-load load displacement of each thrust bearing, and based on the dynamic load displacement average value, detect whether there is a thrust bearing that exceeds the load dynamic change limit; The adjustment module is used to send an alarm signal when a thrust washer exceeding the limit is detected, and calculate the angle adjustment value of the dynamic force of each thrust washer exceeding the limit based on the dynamic load displacement mean.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, a method for optimizing the balance of a thrust bearing of a hydro-turbine generator set as described in any one of claims 1 to 7 is implemented.

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