CN107013673B - Wind turbine generator gearbox lubrication system and fault monitoring method of temperature control valve of wind turbine generator gearbox lubrication system - Google Patents
Wind turbine generator gearbox lubrication system and fault monitoring method of temperature control valve of wind turbine generator gearbox lubrication system Download PDFInfo
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- CN107013673B CN107013673B CN201710444470.0A CN201710444470A CN107013673B CN 107013673 B CN107013673 B CN 107013673B CN 201710444470 A CN201710444470 A CN 201710444470A CN 107013673 B CN107013673 B CN 107013673B
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- 238000005461 lubrication Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000010248 power generation Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 108
- 239000012208 gear oil Substances 0.000 description 23
- 239000003570 air Substances 0.000 description 5
- 239000012080 ambient air Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0405—Monitoring quality of lubricant or hydraulic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
- F16N29/04—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems enabling a warning to be given; enabling moving parts to be stopped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2250/00—Measuring
- F16N2250/08—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a lubrication system for a gearbox of a wind turbine generator, which comprises a gearbox inlet distributor, an oil pool, an oil pump, a heat exchanger, a temperature control valve, a straight-through passage, a controller, a first temperature sensor, a second temperature sensor, a first pressure sensor and a second pressure sensor. The invention also provides a fault monitoring method of the temperature control valve in the wind turbine gearbox lubrication system, which comprises the following steps: A. acquiring a first oil temperature value and a second oil temperature value in real time through a first temperature sensor and a second temperature sensor, and calculating a difference value between the first oil temperature value and the second oil temperature value; B. when the first oil temperature value is higher than the opening temperature of the temperature control valve, comparing the difference value of the first oil temperature value and the second oil temperature value with a preset temperature difference threshold value, and judging whether the temperature control valve fails or not. The invention can effectively identify the early failure characteristic of the temperature control valve and send out early warning, can reduce the power generation loss caused by unexpected failure of the temperature control valve, and can prolong the service life of the temperature control valve.
Description
Technical Field
The invention relates to the technical field of wind turbines, in particular to a wind turbine gearbox lubrication system and a fault monitoring method of a temperature control valve in the wind turbine gearbox lubrication system.
Background
And the gear oil is sucked out of the oil pool through the oil pump, filtered by the filter and then enters the temperature control valve, flows through the heat exchange device under the control of the temperature control valve and then enters the gear box, or directly enters the gear box. The wind turbine gearbox lubrication system has the following two functions: firstly, lubrication is provided for bearings and gears in the gear box, abrasion is reduced, and the service life of the gear box is prolonged; and secondly, carrying heat generated by bearing friction and gear meshing friction in the operation process of the gear box to a heat exchanger in a lubricating system through gear oil, and returning the gear oil to the gear box to lubricate the bearing and the gear after forced heat exchange with media such as air or cooling liquid by means of a fan.
At present, a gear oil-air heat exchange scheme is adopted for a gear box lubrication system of a doubly-fed machine type below 3MW in a megawatt wind turbine generator. The gear oil-air heat exchange scheme has the advantages that the system structure is simple, the economy is good, and the temperature control valve used for adjusting the flow passing through the heat exchanger in the existing lubrication system is realized by pushing the valve core to move relative to the valve body under the action of thermal expansion and contraction of paraffin. However, because gear oil contains a certain amount of gear or bearing abrasion particles, relative movement between the valve core and the valve body is blocked, so that paraffin bears additional load and cannot expand and shrink freely, fatigue of paraffin materials is caused in the long term, and finally the temperature control valve is disabled.
In order to solve the problem of accidental failure of the temperature control valve, the temperature control valve is treated by a method of periodically replacing the temperature control valve as a spare part at present. However, the existing method only can passively wait for the damage of the temperature control valve, and some wind turbine generators are still failed due to the accident of the temperature control valve, and spare parts are not stored in time on site, so that the wind turbine generators are stopped for a long time, and the generated energy of the wind turbine generators is reduced; meanwhile, the temperature control valve cannot be maintained in time before the temperature control valve fails, so that the working life of the temperature control valve is greatly shortened, and the economical efficiency is poor.
Therefore, how to create a wind turbine gearbox lubrication system and a fault monitoring method of the temperature control valve in the wind turbine gearbox lubrication system, so that the early failure characteristics of the temperature control valve can be identified and early warning can be sent out, the probability of unexpected failure of the temperature control valve is reduced, the generating capacity of the wind turbine is improved, the service life of the temperature control valve is prolonged, and the operation and maintenance cost of the wind turbine is reduced.
Disclosure of Invention
The first problem to be solved by the invention is to provide a lubrication system for a gearbox of a wind turbine, which can identify early failure characteristics of a temperature control valve and send out early warning, so that the probability of unexpected failure of the temperature control valve in the lubrication system is lower, the working life is longer, and the generated energy of the wind turbine using the lubrication system is relatively higher.
In order to solve the technical problems, the invention provides a lubrication system for a gearbox of a wind turbine, which comprises an oil pool, an oil pump, a heat exchanger, a temperature control valve, a circular loop formed by sequentially connecting an inlet distributor of the gearbox with the oil pump, a temperature control valve, a through passage arranged between the oil pump and the temperature control valve, a controller connected with the heat exchanger in parallel, a first temperature sensor, a second temperature sensor, a first pressure sensor and a second pressure sensor connected with the controller, wherein the first temperature sensor, the second temperature sensor, the first pressure sensor and the second pressure sensor are connected with the controller; the first temperature sensor and the first pressure sensor are arranged between the oil pump and the heat exchanger, the second temperature sensor and the second pressure sensor are arranged between the temperature control valve and the gear box inlet distributor, and the controller monitors the temperature control valve according to monitoring data of the first temperature sensor, the second temperature sensor, the first pressure sensor and the second pressure sensor.
As an improvement of the present invention, the oil pump and the heat exchanger are connected to each other through a filter, one end of the safety valve is connected between the oil pump and the filter, the other end of the safety valve is connected with the oil sump, and the first temperature sensor and the first pressure sensor are arranged between the filter and the heat exchanger.
Further improved, the second pressure sensor is disposed at the gearbox inlet distributor.
Further improved, the controller is a controller of a main control system of the wind turbine generator.
The second technical problem to be solved by the invention is to provide a fault monitoring method for the temperature control valve, which can identify early failure characteristics of the temperature control valve and send out early warning, so that the probability of unexpected failure of the temperature control valve is reduced, the generating capacity of a wind turbine generator is improved, the working life of the temperature control valve is prolonged, and the operation and maintenance cost of the wind turbine generator is reduced, so that the defect of the conventional unexpected failure method for the temperature control valve is overcome.
In order to solve the technical problems, the invention also provides a fault monitoring method of the temperature control valve in the wind turbine gearbox lubrication system, which comprises the following steps: A. acquiring a first oil temperature value and a second oil temperature value in real time through a first temperature sensor and a second temperature sensor, and calculating a difference value between the first oil temperature value and the second oil temperature value; B. and (C) when the first oil temperature value is higher than the opening temperature of the temperature control valve, comparing the difference value between the first oil temperature value and the second oil temperature value obtained in the step (A) with a preset temperature difference threshold value, and judging whether the temperature control valve has a fault or not.
As an improvement of the present invention, according to the opening degree of the thermo valve, the preset temperature difference threshold includes a first preset temperature difference threshold in the fully opened state of the thermo valve and a second preset temperature difference threshold in the fully opened state of the thermo valve: when the first oil temperature value is higher than the full-open temperature of the temperature control valve, judging whether the temperature control valve has a fault or not by comparing the difference value between the first oil temperature value and the second oil temperature value obtained in the step (A) with the first preset temperature difference threshold value; and (C) judging whether the temperature control valve has a fault or not by comparing the difference value between the first oil temperature value and the second oil temperature value obtained in the step (A) with the second preset temperature difference threshold value when the first oil temperature value is higher than the opening temperature of the temperature control valve but lower than the full-opening temperature of the temperature control valve.
Further improvement, further comprising step C: and acquiring a first oil pressure value and a second oil pressure value through the first pressure sensor and the second pressure sensor in real time, calculating the difference value between the first oil pressure value and the second oil pressure value, and judging whether the temperature control valve has a fault or not through comparing the difference value between the first oil pressure value and the second oil pressure value with a preset temperature and pressure threshold value when the first oil temperature value is lower than the opening temperature of the temperature control valve.
After the design is adopted, the invention has at least the following advantages:
1. according to the lubrication system for the gearbox of the wind turbine generator system, the controller monitors the temperature control valve according to the monitoring data of the first temperature sensor, the second temperature sensor, the first pressure sensor and the second pressure sensor, so that the purposes of identifying early failure characteristics of the temperature control valve and giving out early warning are achieved, the probability of unexpected failure of the temperature control valve of the lubrication system is low, the working life is long, and the generated energy of the wind turbine generator system applying the lubrication system is relatively high.
2. The temperature control valve fault monitoring method can effectively identify early failure characteristics of the temperature control valve and send out early warning, can reduce power generation loss caused by accidental failure of the temperature control valve, can prolong the service life of the temperature control valve, and overcomes the defects of the existing method for solving the accidental failure of the temperature control valve.
Drawings
The foregoing is merely an overview of the present invention, and the present invention is further described in detail below with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of a lubrication system for a gearbox of a wind turbine according to the present invention;
wherein, 1, an oil pump, 2, a filter, 3, a heat exchanger, 4, a temperature control valve, 5, a first temperature sensor, 6 and a second temperature sensor, 7, a second pressure sensor, 8, a safety valve, 9, an oil pool, 10, a gear box inlet distributor, 11 and a first pressure sensor.
Detailed Description
According to the lubrication system for the gearbox of the wind turbine, provided by the invention, through monitoring the oil temperature and the oil pressure of the gear oil in the lubrication system, the early failure characteristic of the temperature control valve in the lubrication system can be identified and early warning is sent out, so that the probability of unexpected failure of the temperature control valve is lower, the working life is longer, and the generated energy of the wind turbine applying the lubrication system is relatively higher.
As shown in fig. 1, the gearbox lubrication system of the wind turbine generator system according to the embodiment comprises an oil tank 9, an oil pump 1, a filter 2, a heat exchanger 3, a temperature control valve 4, a gearbox inlet distributor 10 and a safety valve 8, wherein the oil tank 9, the oil pump 1, the filter 2, the heat exchanger 3, the temperature control valve 4 and the gearbox inlet distributor 10 are sequentially connected and form an annular loop, a through passage is further arranged between the temperature control valve 4 and the filter 2, the through passage is parallel to the heat exchanger 3, the temperature control valve 4 is used for controlling the flow of gear oil flowing through the heat exchanger 3 and the through passage according to the temperature of the gear oil, one end of the safety valve 8 is connected between the oil pump 1 and the filter 2, the other end of the safety valve 8 is connected with the oil tank 9, and when the oil pressure in the lubrication system is overlarge, the gear oil can be guided into the oil tank 9 through the safety valve 8.
The lubrication system also comprises a controller, a first temperature sensor 5, a second temperature sensor 6, a first pressure sensor 11 and a second pressure sensor 7 which are connected with the controller; a first temperature sensor 5 and a first pressure sensor 11 are provided between the filter 2 and the heat exchanger 3, a second temperature sensor 6 and a second pressure sensor 7 may be provided between the thermo valve 4 and the gearbox inlet distributor 10, and a controller monitors the thermo valve 4 based on monitoring data of the first temperature sensor 5, the second temperature sensor 6, the first pressure sensor 11 and the second pressure sensor 7.
As a preferred option, the second pressure sensor 7 may be provided at the gearbox inlet distributor 10, or an existing pressure sensor at the gearbox inlet distributor 10 may be used as the second pressure sensor 7, which is beneficial for simplifying the lubrication system structure and saving costs.
The controller may be a controller of a main control system of the wind turbine, that is, the first and second temperature sensors 5 and 6 and the first and second pressure sensors 11 and 7 collect data and then transmit the data to the main control system of the wind turbine, and the main control system monitors the temperature control valve 4.
The invention also provides a fault monitoring method of the temperature control valve 4 of the wind turbine gearbox lubrication system, which comprises the following steps: A. acquiring a first oil temperature value and a second oil temperature value in real time through a first temperature sensor 5 and a second temperature sensor 6, and calculating a difference value between the first oil temperature value and the second oil temperature value; B. and (3) when the first oil temperature value is higher than the opening temperature of the temperature control valve 4, comparing the difference value between the first oil temperature value and the second oil temperature value obtained in the step (A) with a preset temperature difference threshold value to judge whether the temperature control valve 4 has a fault or not.
In order to monitor the thermo valve 4 when the first oil temperature value is lower than the opening temperature of the thermo valve 4, the fault monitoring method may further comprise step C: the first oil pressure value and the second oil pressure value are obtained in real time through the first pressure sensor 11 and the second pressure sensor 7, the difference value between the first oil pressure value and the second oil pressure value is calculated, and whether the temperature control valve 4 fails or not is judged by comparing the difference value between the first oil pressure value and the second oil pressure value with a preset temperature pressure threshold value.
The temperature control valve 4 is used for controlling the flow rate of the gear oil flowing through the heat exchanger 3 and the through passage, if the temperature control valve 4 is jammed, the flow rate of the gear oil flowing through the heat exchanger 3 and the through passage is different from the design flow rate, and then the difference value between the first oil temperature value and the second oil temperature value or the difference value between the first oil pressure value and the second oil pressure value is deviated from the set value, and by monitoring the difference value between the first oil temperature value and the second oil temperature value or the difference value between the first oil pressure value and the second oil pressure value, the early failure characteristic of the temperature control valve 4 in the lubrication system can be identified and early warning can be sent.
Specifically, the temperature control valve 4 is divided into three working conditions: the full-open condition of the temperature control valve 4, the condition from the opening of the temperature control valve 4 to the full-open condition, and the condition from the closing of the temperature control valve 4.
When the first oil temperature value is higher than the full-open temperature of the temperature control valve 4, the lubrication system is in the full-open working condition of the temperature control valve 4. Under the working condition, a small amount of gear oil is removed, and the gear oil directly flows into the gear box due to the internal leakage of the temperature control valve 4, and most of the gear oil flows into the gear box after heat exchange of the heat exchanger 3.
The heat dissipation capacity of the heat exchanger 3 can be calculated according to a heat balance equation and a heat transfer equation, which are respectively shown in the following equations 1 and 2:
Q＝CM(t 1 -t 2 ) (1)
wherein Q is the heat dissipation capacity (KW) of the heat exchanger 3, C is the constant pressure specific heat (KI/kg.K) of the gear oil, M is the mass flow rate (kg/s) of the gear oil, t 1 At a first oil temperature value, t 2 The second oil temperature value is the same as the following.
Q＝K(t 1 -t 0 ) (2)
Wherein K is the engineering heat exchange coefficient (KW/K, simply called heat exchange coefficient) of the heat exchanger 3, t 0 The temperature of the heat exchange medium of the heat exchanger 3, in this embodiment, the ambient air temperature, is the same as the following.
The difference t between the first oil temperature value and the second oil temperature value can be calculated according to the heat balance equation and the heat transfer equation 1 -t 2 ＝K(t 1 -t 0 )/CM，The difference between the first oil temperature value and the second oil temperature value and the first oil temperature value t under the working condition 1 Heat exchange coefficient K of heat exchanger 3, ambient air temperature t 0 And the gear oil flow M through the heat exchanger 3. Since the gear oil flow rate C passing through the heat exchanger 3 and the air flow rate provided by the forced fan are constant, the heat exchange coefficient K of the heat exchanger 3 is basically unchanged, and the heat dissipation capacity of the heat exchanger 3 is controlled by the first oil temperature value t 1 And ambient air temperature t 0 Is determined by the difference between the two. In an environment test box, for example, under the condition of simulating a large heat source power, the difference between the first oil temperature value and the second oil temperature value corresponding to different ambient air temperatures of the temperature control valve 4 can be measured, and if the temperature control valve 4 fails, the gear oil flow flowing through the heat exchanger 3 changes, so that the difference between the first oil temperature value and the second oil temperature value changes.
Therefore, the range value obtained by taking a certain correlation coefficient into consideration is used as the first preset temperature difference threshold value for judging whether the temperature control valve 4 is stuck or not based on the difference between the measured first oil temperature value and the second oil temperature value. Comparing the difference value of the first oil temperature value and the second oil temperature value obtained in real time with a first preset temperature difference threshold value, and performing fault early warning in real time when the difference value of the first oil temperature value and the second oil temperature value obtained in real time exceeds the first preset temperature difference threshold value.
When the first oil temperature value is higher than the opening temperature of the temperature control valve 4 but lower than the full opening temperature of the temperature control valve 4, the lubrication system is in a working condition that the temperature control valve 4 is opened to the full opening. Under this condition, the total flow of the lubrication system is basically unchanged, the gear oil flow passing through the heat exchanger 3 gradually rises from almost zero to almost zero, and the gear oil flow directly flowing into the gear box without passing through the heat exchanger 3 correspondingly drops from almost zero to almost zero. As the flow through the heat exchanger 3 changes, the heat exchange coefficient of the heat exchanger 3 changes, e.g. from 0 to the nominal value.
In the environment test box, under the condition of simulating larger heat source power, a difference value between a first oil temperature value and a second oil temperature value, which are corresponding to different heat exchange coefficients of a certain ambient air temperature and the heat exchanger 3 and corresponding to the gear oil flow in the heat exchanger 3, can be obtained through test, and the range value obtained by considering a certain correlation coefficient is taken as a second preset temperature difference threshold value for judging whether the temperature control valve 4 is stuck or not based on the measured difference value between the first oil temperature value and the second oil temperature value. Comparing the difference value of the first oil temperature value and the second oil temperature value obtained in real time with a second preset temperature difference threshold value, and judging that the temperature control valve 4 is stuck when the difference value of the first oil temperature value and the second oil temperature value obtained in real time exceeds the second preset temperature difference threshold value, so as to perform fault early warning.
When the first oil temperature value is lower than the opening temperature of the temperature control valve 4, the lubrication system is in the closing working condition of the temperature control valve 4. Under the working condition, the gear oil in the lubrication system hardly flows through the heat exchanger 3 and directly enters the gear box, so that the difference value between the first oil temperature value and the second oil temperature value is very small, and the difference value cannot be used as the judgment basis of the clamping stagnation of the temperature control valve 4. However, under this working condition, the clamping of the temperature control valve 4 may cause a change in the difference between the first oil pressure value and the second oil pressure value, and at the same time, a change in viscosity caused by a difference in the gear oil temperature may cause a change in the resistance of the lubrication system, thereby also causing a change in the first oil pressure value and the second oil pressure value.
In the environment test box, under the condition of simulating smaller heat source power, the difference value between the first oil pressure value and the second oil pressure value under the condition of the oil temperature before different heat exchangers 3 can be measured, the measured first oil pressure value and second oil pressure value are taken as the basis, the range value obtained after a certain correlation coefficient is considered is taken as the temperature-pressure threshold value for judging whether the temperature control valve 4 is jammed, the difference value between the first oil pressure value and the second oil pressure value obtained in real time is compared with the temperature-pressure threshold value, and when the difference value between the first oil pressure value and the second oil pressure value obtained in real time exceeds the temperature-pressure threshold value, the temperature control valve 4 is judged to be jammed, and fault early warning is carried out.
The heat exchanger 3 in this embodiment is described by taking an air heat exchanger as an example, and should not be construed as limiting the present application.
The temperature control valve fault monitoring method can effectively identify early failure characteristics of the temperature control valve, discover and send early warning early, reduce power generation loss caused by accidental faults of the temperature control valve, and prolong the service life of the temperature control valve.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, and some simple modifications, equivalent variations or modifications can be made by those skilled in the art using the teachings disclosed herein, which fall within the scope of the present invention.
Claims (4)
1. A fault monitoring method of a temperature control valve in a wind turbine generator gear box lubrication system comprises an oil pool, an oil pump, a heat exchanger, the temperature control valve and a gear box inlet distributor which are sequentially connected to form a ring-shaped loop, a controller, a first temperature sensor, a second temperature sensor, a first pressure sensor and a second pressure sensor which are connected with the controller, wherein a through passage is further arranged between the oil pump and the temperature control valve, and the through passage and the heat exchanger are arranged in parallel; the first temperature sensor and the first pressure sensor are arranged between the oil pump and the heat exchanger, the second temperature sensor and the second pressure sensor are arranged between the temperature control valve and the gear box inlet distributor, and the controller monitors the temperature control valve according to monitoring data of the first temperature sensor, the second temperature sensor, the first pressure sensor and the second pressure sensor; the fault monitoring method is characterized by comprising the following steps of:
A. acquiring a first oil temperature value and a second oil temperature value in real time through a first temperature sensor and a second temperature sensor, and calculating a difference value between the first oil temperature value and the second oil temperature value;
B. when the first oil temperature value is higher than the opening temperature of the temperature control valve, judging whether the temperature control valve has a fault or not by comparing the difference value between the first oil temperature value and the second oil temperature value obtained in the step A with a preset temperature difference threshold value;
according to the opening degree of the temperature control valve, the preset temperature difference threshold value comprises a first preset temperature difference threshold value in a full-open state of the temperature control valve and a second preset temperature difference threshold value in a state from the opening of the temperature control valve to the full-open state:
when the first oil temperature value is higher than the full-open temperature of the temperature control valve, judging whether the temperature control valve has a fault or not by comparing the difference value between the first oil temperature value and the second oil temperature value obtained in the step A with the first preset temperature difference threshold;
when the first oil temperature value is higher than the opening temperature of the temperature control valve but lower than the full-opening temperature of the temperature control valve, judging whether the temperature control valve has a fault or not by comparing the difference value between the first oil temperature value and the second oil temperature value obtained in the step A with the second preset temperature difference threshold;
C. acquiring a first oil pressure value and a second oil pressure value in real time through the first pressure sensor and the second pressure sensor, calculating the difference value between the first oil pressure value and the second oil pressure value, and judging whether the temperature control valve has a fault or not by comparing the difference value between the first oil pressure value and the second oil pressure value with a preset temperature-pressure threshold value when the first oil temperature value is lower than the opening temperature of the temperature control valve; the temperature and pressure threshold is a range value which is obtained based on the measured first oil pressure value and the measured second oil pressure value and is used for judging whether the temperature control valve is stuck or not by combining the correlation coefficient.
2. The method of claim 1, further comprising a filter connected between the oil pump and the heat exchanger, and a relief valve having one end connected between the oil pump and the filter and the other end connected to the oil sump, the first temperature sensor and the first pressure sensor being disposed between the filter and the heat exchanger.
3. The method of claim 2, wherein the second pressure sensor is disposed at the gearbox inlet distributor.
4. The fault monitoring method of the temperature control valve according to claim 3, wherein the controller is a controller of a main control system of a wind turbine.
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| CN201710444470.0A CN107013673B (en) | 2017-06-13 | 2017-06-13 | Wind turbine generator gearbox lubrication system and fault monitoring method of temperature control valve of wind turbine generator gearbox lubrication system |
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| CN201710444470.0A CN107013673B (en) | 2017-06-13 | 2017-06-13 | Wind turbine generator gearbox lubrication system and fault monitoring method of temperature control valve of wind turbine generator gearbox lubrication system |
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| CN109580216A (en) * | 2019-02-15 | 2019-04-05 | 国电联合动力技术有限公司 | The intelligent trouble early warning system and its method and unit of gearbox lubrication cooling system |
| CN110422230A (en) * | 2019-09-11 | 2019-11-08 | 三一专用汽车有限责任公司 | Hydraulic steering system, mixer truck and its control method |
| DE102019214080A1 (en) * | 2019-09-16 | 2021-03-18 | Vitesco Technologies GmbH | Method for monitoring an oil flow generated by means of an oil pump in an oil cooling circuit of a thermal management system |
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| CN205977391U (en) * | 2016-07-01 | 2017-02-22 | 宝沃汽车（中国）有限公司 | Vehicle temperature saver trouble monitoring device and vehicle |
| CN106523303A (en) * | 2016-09-21 | 2017-03-22 | 江苏大学 | Interaction heat dissipation device and method used for wind power generation reduction gear box |
| CN206889647U (en) * | 2017-06-13 | 2018-01-16 | 国电联合动力技术有限公司 | A kind of wind turbine generator system gear box lubricating system |
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| PL2104116T3 (en) * | 2008-03-12 | 2017-09-29 | Alstom Transport Technologies | Oil cooling system, particularly for transformers feeding traction electric motors, transformer with said system and method for determining the cooling fluid flow in a cooling system |
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| US6279390B1 (en) * | 1996-12-17 | 2001-08-28 | Denso Corporation | Thermostat malfunction detecting system for engine cooling system |
| CN202381670U (en) * | 2011-12-20 | 2012-08-15 | 北京南口轨道交通机械有限责任公司 | Lubricating and cooling system for gear box of wind turbines |
| CN205977391U (en) * | 2016-07-01 | 2017-02-22 | 宝沃汽车（中国）有限公司 | Vehicle temperature saver trouble monitoring device and vehicle |
| CN106523303A (en) * | 2016-09-21 | 2017-03-22 | 江苏大学 | Interaction heat dissipation device and method used for wind power generation reduction gear box |
| CN206889647U (en) * | 2017-06-13 | 2018-01-16 | 国电联合动力技术有限公司 | A kind of wind turbine generator system gear box lubricating system |
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Inventor after: Chu Jingchun Inventor after: Kang Tao Inventor after: Yuan Yize Inventor after: Yuan Ling Inventor after: Pan Lei Inventor before: Chu Jingchun Inventor before: Kang Tao Inventor before: Yuan Yize Inventor before: Yuan Ling Inventor before: Pan Lei |