Rapid measurement method for oxidation stability of gear oil for wind farm

Abstract

A rapid measurement method for oxidation stability of gear oil for a wind farm, comprising the following specific steps: S1, placing a fixed mass of gear oil in a closed environment, and introducing oxygen at a set pressure into the closed environment; and S2, raising the temperature of the closed environment to a set temperature, maintaining a constant temperature, starting timing when the temperature rises, stopping timing when the decreased value of the oxygen pressure in the closed environment occupies a fixed percentage of the maximum pressure, and using the time value to represent the oxidation stability of the gear oil. The method has the advantages of short measurement period, small sample consumption, simple operation, accurate and reliable results, and wide application range, and is of great significance for ensuring the safe operation of devices and improving economic and social benefits.

Description

A method for rapidly determining the oxidation stability of gear oil for wind farms

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese patent application No. 202411066587.6, filed on August 5, 2024, and entitled "A method for rapidly determining the oxidation stability of gear oil for wind farms", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the technical field of chemical analysis, and specifically relates to a method for rapidly determining the oxidation stability of gear oil for wind farms. BACKGROUND

[0004] At present, the wind power industry has entered a rapid development stage, the installed capacity of wind power continues to grow, the number of wind turbines continues to increase, and the demand for gear oil also increases. As a key component of wind turbine, the lubricating oil for gear oil faces severe working conditions during operation, including high temperature, heavy load, frequent start-stop, etc., which requires the gear oil to have good extreme pressure resistance, anti-rust performance, anti-foaming performance and viscosity uniformity. Therefore, extreme pressure anti-wear additives, corrosion inhibitors, antioxidants, anti-emulsifiers, anti-foaming agents, etc. must be added to the oil. These additives contain esters, salts, strong oxidizing agents, etc., which can reduce the antioxidant performance of the gear oil, so the antioxidant performance of the gear oil is poorer than that of other lubricating oils. In addition, the gear oil will inevitably be contaminated by worn metals and water during operation, which can cause further decline in its antioxidant performance. The degree of contamination is different, which leads to different degrees of decline in its antioxidant performance. When the antioxidant performance of the gear oil declines to a certain extent, if not handled in time, the gear oil will rapidly deteriorate, producing sludge and precipitates, which will affect its lubricating function. The decline in lubricating function leads to an increase in metal content in the gear oil, which causes the cycle of gear oil deterioration-accelerated equipment wear.

[0005] In the supervision of running gear oil, about half of the wind farm gear oil sludge precipitation detection results have a non-conformance rate of more than 50%. Therefore, it is urgent to detect the antioxidant performance of running gear oil and take reasonable treatment measures at the appropriate time to improve the antioxidant performance of the oil quality and avoid accelerated oil quality deterioration and the generation of sludge, which leads to a decline in its lubricating performance.

[0006] At present, the method for detecting the oxidation stability of new gear oil is SH / T0123 "Extreme Pressure Lubricating Oil Oxidation Performance Determination Method". The method simulates the oxidation process of gear oil, determines the increase value of the kinematic viscosity and the change of the sediment value to evaluate the oxidation stability of the gear oil. Specifically, the sample is oxidized for 312h at 121℃ by passing through constant pressure dry air, and then the oxidation stability of the gear oil is indicated by determining the increase value of the kinematic viscosity at 100℃ and the change of the sediment value. The method has a long detection period and needs a large amount of sample, and is suitable for the detection of the oxidation stability of gear oil in product research and development and the monitoring of product quality by manufacturers, but is not suitable for the detection of the oxidation stability of gear oil in the process of new oil acceptance and running oil supervision by users. Therefore, it is of great significance to study a rapid oxidation stability determination method for gear oil. SUMMARY

[0007] In order to solve the problems in the prior art, the application provides a rapid determination method for the oxidation stability of gear oil for wind field, which has the advantages of short detection period, small sample amount, simple operation, accurate and reliable results, wide application range and the like, and has important significance for ensuring the safe operation of equipment, improving economic and social benefits.

[0008] The application provides the following technical scheme: a rapid determination method for the oxidation stability of gear oil for wind field, and the specific steps are as follows:

[0009] S1, a fixed amount of gear oil is placed in a closed environment, and oxygen with a set pressure is introduced into the closed environment;

[0010] S2, the closed environment is heated to a set temperature and kept constant, and the timing starts from the heating, when the oxygen pressure in the closed environment decreases by a fixed percentage of the highest pressure, the timing stops, and the time value is used to represent the oxidation stability of the gear oil.

[0011] Optionally, in S1, the water content of the gear oil is not more than 500mg / kg.

[0012] Optionally, in S1, a fixed value of 2g-5g of gear oil is weighed and placed in the closed environment.

[0013] Optionally, in S1, 4.000g+0.020g of gear oil is weighed and placed in the closed environment.

[0014] Optionally, in S1, the closed environment is repeatedly filled and discharged with oxygen to discharge the residual air in the closed environment, and then the oxygen is filled until the set pressure is reached, and the pressure is maintained stable for not less than 30s.

[0015] Optionally, in S1, the set pressure is a fixed value in the range of 200kPa-600kPa.

[0016] Optionally, in S2, the set temperature is a fixed value in the range of 150℃ to 180℃, the set temperature deviation is ±0.5℃, and the time for raising the temperature of the closed environment to the set temperature is less than 10 minutes.

[0017] Optionally, in S2, the set temperature is 170℃, the set temperature deviation is ±0.5℃, and the time for raising the temperature of the closed environment to the set temperature is less than 10 minutes.

[0018] Optionally, in S2, when the oxygen pressure in the closed environment decreases from the maximum pressure by a fixed value in the range of 5% to 15%, the time required is used to characterize the oxidation stability of the gear oil.

[0019] Optionally, in S2, when the oxygen pressure in the closed environment decreases from the maximum pressure by 10%, the time required is used to characterize the oxidation stability of the gear oil.

[0020] Compared with the prior art, the present application has at least the following beneficial effects:

[0021] The present application provides a rapid determination method for the oxidation stability of gear oil for wind farms. The method records the pressure change in the closed environment continuously and stops timing when a specific pressure change is reached. The recorded time is used as the basis for evaluating the antioxidant performance of the gear oil. This method can accurately reflect the oxidation stability of the gear oil, has good repeatability, and the results are reliable. The traditional method requires an oxidation test time of up to 312 hours, while the method of the present application uses minutes (min) as the unit of time, greatly shortening the detection period and making the detection process more efficient and fast. The traditional method requires a large amount of sample to meet the long-term testing requirement, while the sample amount required by the method of the present application is significantly reduced, which is of great significance for resource conservation and cost control. The method of the present application does not require the use of any chemical reagents and catalysts, but only needs to control physical conditions such as temperature and pressure to complete the test. The operation process is simple and easy to understand, reducing the operation difficulty and cost.

[0022] The method of the present application is not only suitable for the oxidation stability detection of new oil, but also suitable for the real-time monitoring of the antioxidant performance of running gear oil. This helps users to timely understand the antioxidant performance of the gear oil during the new oil acceptance and running oil supervision process, so as to take corresponding measures to ensure the normal operation of the equipment. By rapidly and accurately evaluating the oxidation stability of the gear oil, the quality of the new oil can be ensured, the poor quality gear oil can be prevented from entering the wind turbine and other equipment, and the equipment failure and maintenance cost caused by the gear oil problem can be reduced. At the same time, for the running gear oil, timely understanding of its antioxidant performance and taking effective measures can avoid the generation of oil sludge and precipitates in the oil system, maintain the good lubrication state of the equipment, prolong the service life of the equipment, and improve the economic benefit and social benefit. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a comparison chart of color change of oil samples of the present application before and after aging of samples 1-4;

[0024] Figure 2 is a comparison chart of oil sludge precipitation of oil samples of the present application before and after aging of samples 1-4. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] In the present application, all the embodiments and optional implementation methods mentioned in the present application can be combined to form new technical solutions, unless otherwise specified.

[0027] In the present application, all the technical features and optional features mentioned in the present application can be combined to form new technical solutions, unless otherwise specified.

[0028] In the present application, unless otherwise specified, percentage (%) or part refers to the weight percentage or weight part of the composition.

[0029] In the present application, unless otherwise specified, each component or its optional component involved can be combined to form a new technical solution.

[0030] In the present application, unless otherwise specified, the numerical range "a-b" represents a shorthand representation of any real number combination between a and b, where a and b are real numbers. For example, the numerical range "6-22" represents that all real numbers between "6-22" have been listed herein, and "6-22" is only a shorthand representation of these numerical combinations.

[0031] The lower limit and upper limit of the range disclosed in the present application can be one or more lower limits and one or more upper limits, respectively.

[0032] In the present application, the term "and / or" used herein means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0033] In the present application, unless otherwise specified, each reaction or operation step can be performed sequentially or according to the sequence. Alternatively, the reaction method herein is sequentially performed.

[0034] Unless otherwise specified, the professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any method or material similar or equivalent to that described can also be applied in the present application.

[0035] The application provides a rapid determination method for oxidation stability of gear oil for wind field, which comprises the following steps of: placing the gear oil into a closed environment, introducing oxygen into the closed environment to reach a set pressure, heating the gear oil to a constant temperature, starting the heating and timing at the same time, continuously recording the pressure of the closed environment during the timing, stopping the timing when the detected pressure value drops by a set pressure value from the highest pressure, and taking the recorded time as the basis for evaluating the oxidation resistance of the gear oil.

[0036] Step 1: sampling the new gear oil or the running gear oil, and controlling the water content of the gear oil to reach the standard requirement of the running oil, so that the water content is not more than 500 mg / kg, to obtain the gear oil to be detected;

[0037] Step 2: placing the gear oil to be detected into a closed environment, introducing oxygen into the closed environment at room temperature, so that the set pressure of the closed environment reaches a fixed value in the range of 200 kPa to 600 kPa, stopping the introduction of oxygen, and detecting the pressure value of the closed environment, wherein the deviation is within ±0.05 kPa, and the set pressure is considered to be reached.

[0038] Step 3: heating the gear oil in the closed environment to a set temperature, and keeping the temperature constant for a period of time, at this time, the gear oil and oxygen react, the time required from the start of heating to the fixed percentage of the highest pressure of the oxygen pressure drop in the closed environment is detected, and the time value is used to represent the oxidation stability of the gear oil, and the temperature of the closed environment is detected, wherein the deviation is within ±0.5℃, and the set temperature is considered to be reached.

[0039] Step 4: repeating steps 2 and 3 to perform repeated determination, and taking the arithmetic mean of the two determination results meeting the repeatability requirement as the determination result of the oxidation stability of the gear oil.

[0040] Optionally, in step 1, the new gear oil or the running gear oil should be sealed and stored immediately after sampling, and can be opened until testing.

[0041] Optionally, in step 2, 2 g to 5 g of the treated new gear oil or the running gear oil is taken, and preferably 4.000 g+0.020 g of the treated new gear oil or the running gear oil is taken as the sample to be detected; when the oxidation stability of a plurality of gear oils is detected, the same sampling amount is ensured to be in the same detection environment, so that the horizontal comparison data can be obtained.

[0042] Optionally, in step 2, the closed environment is a pressure container, the material of the pressure container is lead, aluminum, stainless steel or other corrosion-resistant materials, the volume is 20 mL, the inner diameter is 50±0.15 mm, the pressure can be withstood is not less than 800 kPa, the inner surface is polished, and it is provided with a filling valve, a safety valve, a gas release valve and an integrated cooling fan, wherein the valve is a dead volume and a small hole size electromagnetic valve, and the cooling fan can make the external air blow the bottom of the pressure container to accelerate the cooling of the temperature after the test to room temperature.

[0043] Optionally, in step 2, the volume ratio of the treated gear oil to the closed environment can be (2-5) g / 20 ml.

[0044] Optionally, in step 2, the sample to be detected is placed in the closed environment, and oxygen is repeatedly filled and released in the closed environment for 3 times under room temperature to discharge the residual air in the closed environment, and then oxygen is filled until the set pressure is reached and maintained stably for not less than 30 s, and the optimal set pressure is 300 kPa±0.05 kPa.

[0045] Optionally, in steps 2 and 3, a pressure sensor is used to detect the pressure in the closed environment, the test range of the pressure sensor is not less than 0-800 kPa, the deviation is within ±1%, and the accuracy is 0.01 kPa.

[0046] Optionally, in step 3, the optimal set temperature is 170℃±0.5℃, and the temperature of the closed environment should be raised to the set temperature in less than 10 min.

[0047] Optionally, in step 3, a metal bath is used to heat the sample to be detected in the closed environment, the power of the metal bath is 500 w, the metal bath is sealed at the bottom of the pressure container, the temperature control range is room temperature-200℃, the accuracy is ±0.5℃, and the precision is 0.1℃; a temperature sensor is used to detect the temperature in the closed environment, the temperature sensor is a platinum resistance thermometer, the test range is room temperature-200℃, and the precision is ±0.1℃.

[0048] Optionally, in step 3, the time required for the optimal oxygen pressure in the closed environment to drop from the highest pressure by a certain fixed value of 5%-15% is used to represent the oxidation stability of the gear oil.

[0049] Optionally, in step 3, the time required for the optimal oxygen pressure in the closed environment to drop from the highest pressure by 10% is used to represent the oxidation stability of the gear oil.

[0050] Optionally, in step 3, if the pressure continues to drop within 5 min of the initial reaction is detected, the test should be stopped.

[0051] Wherein, the reaction rate v = kc, if the reactant concentration c is the same at the same temperature, the rate constant k is certain for a specific substance. For different gear oils, the value of k is different, the reaction rate v is different, the method limits the same temperature and reactant concentration, and the oxidation rate of the gear oil is characterized by the rate of the decrease of the reactant content, and then the oxidation stability of the gear oil is characterized.

[0052] The value of k is related to the reaction temperature, the higher the temperature, the greater the value of k, the faster the reaction speed, and the shorter the time to distinguish the oxidation stability difference of the gear oil. However, if the temperature is too high, the additives in the gear oil will be ineffective, deviating from the actual situation, and the test time will be too short, and the result will be repeated.

[0053] The data of the maximum pressure drop is different, indicating that the oxidation degree of the gear oil is different; the same pressure chamber and the same glassware are used, and the contact area of the gear oil with oxygen is the same. Oxygen is the reactant, as long as the same pressure of oxygen is set, the concentration of the reactant oxygen during the oxidation process of different gear oils is the same, the amount of the consumed reactant oxygen is also the same, and the time to reach the test end point of different gear oils is only related to the reaction ability of the gear oil itself with oxygen. The setting principle of the maximum pressure drop should meet the following two conditions:

[0054] One is not too small, otherwise the time to reach the end point of different gear oils will not be obviously distinguished, and the result will be too short, which is easy to cause large deviation of the test result;

[0055] The other is not necessarily too large, otherwise the time to reach the end point will be long, the test time will be prolonged, and the oxidation stability of the gear oil is mainly used to reflect the length of the induction period of the gear oil in the oxygen reaction process, as long as the oxidation product of the gear oil such as oil sludge and the color obviously increases, it indicates that the induction period of the oxidation reaction of the gear oil has basically reached.

[0056] Therefore, the test at 170 DEG C is selected in the present application, the reaction time of the gear oil required when the pressure drop reaches 10% is about 100 min to 500 min, the requirement of rapid detection of the oxidation stability of the gear oil is realized, and the determination method of the present application does not need any chemical reagent and catalyst in the implementation process, the amount of the gear oil for testing is small, the testing speed is fast, and the oxidation stability of the new and running gear oil can be quickly and accurately evaluated.

[0057] Example 1

[0058] The oxidation stability of the gear oil No. 1 sample is detected by the above method of the present application, wherein the gear oil No. 1 sample is a new oil, which specifically comprises the following steps:

[0059] 1) Test the moisture content of sample No. 1, and the test result is 299 mg / kg, which is less than the quality standard 500 mg / kg of the running oil, and can be directly used for testing;

[0060] 2) Turn on the heating device, and set the constant temperature to 170℃;

[0061] 3) Weigh 4.0002 g of sample No. 1 in a glass container with an inner diameter of 3 and a volume of 15 ml;

[0062] 4) Place the glass container in the pressure tank, and after placing the sealing ring at the top sealing part of the pressure tank, tighten the tank cover.

[0063] 5) Open the oxygen valve, slowly fill 300 kPa of oxygen into the pressure tank, then open the exhaust valve to exhaust the oxygen in the pressure tank, and repeat the above step for 3 times to replace the air in the tank. Then fill 300 kPa of oxygen into the pressure tank.

[0064] 6) Turn on the heating device, and simultaneously turn on the timing function and the pressure sensor to continuously detect the pressure in the pressure tank;

[0065] 7) When the detected pressure in the pressure tank decreases to 10% from the highest point, the test time is measured to be 235 min.

[0066] 8) Repeat the above steps, and the measured test time of the weighed gear oil with a mass of 4.0001 g is 242 min;

[0067] 9) Take the average of the two test results as the oxidation stability result of the gear oil, and the result is 238 min.

[0068] The oxidation stability results of sample No. 1 are detected at 5%, 10% and 20% pressure drop, respectively. The oxidation stability results are 110 min, 238 min and 505 min, respectively, and the sludge precipitation test results are trace, yes (appropriate sludge) and yes (a large amount of sludge), respectively. When the pressure drop is 10%, the gear oil has obvious sludge precipitation, indicating that the oxidation of the gear oil has gradually entered the acceleration period, so the method selects 10% pressure drop as the test endpoint.

[0069] Example 2

[0070] The oxidation stability of gear oil sample No. 2 is detected by the above method, wherein the gear oil sample No. 2 is new oil, and the method specifically includes the following steps:

[0071] 1) Test the moisture content of sample No. 2, and the test result is 50 mg / kg, which can be directly used for testing;

[0072] 2) Turn on the heating device and set the constant temperature to 170°C;

[0073] 3) Take 4.006 g of sample No. 2 in a glass container using an analytical balance;

[0074] 4) Place the glass container in the pressure tank, and after placing the sealing ring at the top sealing position of the pressure tank, tighten the tank cover.

[0075] 5) Open the oxygen valve and slowly fill the pressure tank with 300 kPa of oxygen, then open the exhaust valve to exhaust the oxygen in the pressure tank, repeat the above steps 3 times to replace the air in the tank. Then fill the pressure tank with 300 kPa of oxygen.

[0076] 6) Turn on the heating device, and at the same time, turn on the timing function and the pressure sensor to continuously detect the pressure in the pressure tank;

[0077] 7) When the pressure drops to 10% from the highest, the test time is measured to be 432 min.

[0078] 8) Repeat the above steps, and the mass of the gear oil measured this time is 4.0010 g, and the test time measured is 450 min.

[0079] 9) Take the average of the two test results as the oxidation stability result of the gear oil, which is 441 min.

[0080] Example 3

[0081] The oxidation stability of sample No. 3 of gear oil is detected by the above method, wherein sample No. 3 of gear oil is new oil, and the specific steps include:

[0082] 1) Test the moisture content of sample No. 3, and the test result is 157 mg / kg, which can be directly used for testing;

[0083] 2) Turn on the heating device and set the constant temperature to 170°C;

[0084] 3) Take 4.005 g of sample No. 3 in a glass container using an analytical balance;

[0085] 4) Place the glass container in the pressure tank, and after placing the sealing ring at the top sealing position of the pressure tank, tighten the tank cover.

[0086] 5) Open the oxygen valve and slowly fill the pressure tank with 300 kPa of oxygen, then open the exhaust valve to exhaust the oxygen in the pressure tank, repeat the above steps 3 times to replace the air in the tank. Then fill the pressure tank with 300 kPa of oxygen.

[0087] 6) Turn on the heating device, and at the same time, turn on the timing function and the pressure sensor to continuously detect the pressure in the pressure tank;

[0088] 7) When the pressure drops to 10% of the highest, the test time is 200 min.

[0089] 8) Repeat the above steps, the mass of the gear oil is 4.0004 g, and the test time is 211 min.

[0090] 9) Take the average of the two test results as the oxidation stability result of the gear oil, which is 206 min.

[0091] Example 4

[0092] The oxidation stability of the gear oil No. 4 sample is detected by the above method, wherein the gear oil No. 4 sample is a running oil, which specifically comprises the following steps:

[0093] 1) Test the moisture content of the No. 4 sample, the test result is 87 mg / kg, which can be directly used for testing;

[0094] 2) Turn on the heating device and set the constant temperature to 170℃;

[0095] 3) Weigh 4.006 g of sample No. 1 in a glass container with an analytical balance;

[0096] 4) Place the glass container in the pressure tank, place the sealing ring at the top sealing part of the pressure tank, and tighten the tank cover.

[0097] 5) Open the oxygen valve, slowly fill the pressure tank with 300 kPa of oxygen, then open the exhaust valve to exhaust the oxygen in the pressure tank, repeat the above steps 3 times to replace the air in the tank. Then fill the pressure tank with 300 kPa of oxygen.

[0098] 6) Turn on the heating device, and simultaneously turn on the timing function and the pressure sensor to continuously detect the pressure in the pressure tank;

[0099] 7) When the pressure drops to 10% of the highest, the result is 215 min.

[0100] 8) Repeat the above steps, the mass of the gear oil is 4.0014 g, and the result is 208 min.

[0101] 9) Take the average of the two test results as the oxidation stability result of the gear oil, which is 212 min.

[0102] Effect analysis:

[0103] 1) Reproducibility

[0104] The relative deviations of the repeatability tests of the four gear oils in Examples 1-4 were 2.94%, 4.05%, 5.34% and 3.30%, respectively, which had good repeatability and were less than the 12% of the similar standard SH / T 0193 Lubricating Oil Oxidation Stability Test Rotary Bomb Method.

[0105] 2) Consistency with actual results

[0106] The gear oil samples 1-4 in the examples were accelerated aged at 130°C for 144h, and the test results of the gear oils before and after aging are shown in Table 1, the color change of the oil samples before and after aging is shown in Figure 1, and the comparison of sludge precipitation of the oil samples before and after aging is shown in Figure 2.

[0107] Table 1 is the test before and after aging of samples 1-4 Among them, 1b, 2c, etc. in copper strip corrosion (100°C, 3h) are the corrosion grades specified in GB / T 5096, the larger the number, the worse, for the same number, a is the best, b is the second, and c is the worst.

[0108] As can be seen from Table 1, the oxidation stability test results of the four samples of the gear oil are consistent with the actual results after aging, and the shorter the oxidation stability time, the worse the antioxidant capacity of the oil. The oxidation stability of the four gear oils 1-4 measured by the method is 238min, 441min, 206min and 212min, respectively. Under the same conditions in the laboratory, before and after accelerated aging for 144h, the sludge, acid value and corrosion of sample 1 increased significantly; the sludge of sample 2 increased slightly, and the corrosion did not change; the sludge of sample 3 increased significantly, the acid value increased the most, and the corrosion increased the most; the sludge of sample 4 increased significantly (more than sample 1), the acid value increased slightly (gear oil running process will cause some additives to decompose, producing alkaline substances to neutralize the acidic substances produced during aging), and the corrosion did not change; the order of oil quality change from small to large is sample 2, sample 1, sample 4 and sample 3, which is consistent with the test results of oxidation stability.

[0109] In summary, the application discloses a rapid determination method of oxidation stability of gear oil for a wind farm, wherein after the moisture of the gear oil is adjusted to be not more than a standard requirement of running oil, a certain amount of the gear oil is placed in a closed environment, oxygen is introduced into the closed environment to reach a set pressure, the gear oil and the oxygen are heated to a certain temperature, the heating is started and the timing is started at the same time, the pressure of the closed environment is recorded continuously during the timing, and the timing is stopped until the pressure reaches a highest pressure and then drops to a set pressure value, and the recorded time is used as a basis for evaluating the oxidation resistance of the gear oil. The method does not need any chemical reagent and catalyst during implementation, the amount of the gear oil used for testing is small, the testing speed is fast, the oxidation stability of new and running gear oil can be quickly and accurately evaluated, the oxidation stability is an important index for guaranteeing the quality of the gear oil, the quality of the new oil can be known by a customer during acceptance through the application, and the poor quality gear oil can be prevented from entering the wind turbine generator, for the running gear oil, the oxidation resistance of the gear oil can be known in time through the application, when the oxidation resistance decreases to a certain degree, measures are taken in time, the oil sludge and the precipitate of the oil system are prevented, the lubricating performance is prevented from being affected, the lubricating function is prevented from being affected, the abnormal wear of the wind power equipment is prevented, the safe operation of the wind turbine generator equipment is prevented from being affected, and the application has important economic significance and social significance.

Claims

1. A method for rapid determination of the oxidation stability of a wind park gear oil, characterized in that The specific steps are as follows: S1, a fixed mass of gear oil is placed in a closed environment, and oxygen with a set pressure is introduced into the closed environment; S2, the closed environment is heated to a set temperature and kept constant, the timing starts from the heating, when the oxygen pressure in the closed environment drops by a fixed percentage of the highest pressure, the timing stops, and the time value is used to represent the oxidation stability of the gear oil.

2. The method of claim 1, wherein the wind farm gear oil oxidation stability is determined by measuring the oxidation induction time (OIT) of the wind farm gear oil. In S1, the water content of the gear oil is not more than 500 mg / kg.

3. The rapid determination method for the oxidation stability of wind farm gear oil according to claim 1, characterized in that, In S1, a fixed mass of gear oil is placed in a closed environment.

4. The method of claim 1, wherein the wind farm gear oil oxidation stability is determined by measuring the oxidation induction time (OIT) of the wind farm gear oil. In S1, 4.000g+0.020g of gear oil is placed in a closed environment.

5. The method of claim 1, wherein the wind farm gear oil oxidation stability is determined rapidly. In S1, the closed environment is repeatedly filled and discharged with oxygen to discharge the residual air in the closed environment, and then filled with oxygen until the set pressure is reached, and the pressure is maintained stable for not less than 30s.

6. The method for rapid determination of oxidation stability of wind farm gear oil according to claim 1 or 5, characterized in that, In S1, the set pressure is a fixed value in 200kPa-600kPa.

7. The method of claim 1, wherein the wind farm gear oil oxidation stability is determined rapidly. In S2, the set temperature is a fixed value in 150℃-180℃, the deviation of the set temperature is ±0.5℃, and the temperature of the closed environment is heated to the set temperature in less than 10min.

8. The method of claim 1, wherein the wind farm gear oil oxidation stability is determined rapidly. In S2, the set temperature is 170℃, the deviation of the set temperature is ±0.5℃, and the temperature of the closed environment is heated to the set temperature in less than 10min.

9. The method of claim 1, wherein the wind farm gear oil oxidation stability is determined rapidly. In S2, when the oxygen pressure in the closed environment drops by a fixed value of 5%-15% from the highest pressure, the time required is used to represent the oxidation stability of the gear oil.

10. The method of claim 1, wherein In S2, when the oxygen pressure in the closed environment drops by 10% from the highest pressure, the time required is used to represent the oxidation stability of the gear oil.

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