Verification method for performance of fire-resistant oil for industrial equipment lubricating system

Abstract

The invention relates to the field of nuclear power chemical analysis, in particular to a method for verifying the performance of fire-resistant oil for an industrial equipment lubricating system. The verification method comprises the following steps: carrying out all-item index analysis detection according to related technical index analysis standards, and judging the technical performance of the fire-resistant oil; the deterioration degree and the change trend of the aged fire-resistant oil are verified through an oxidation stability test; the hydrolysis resistance of the fire-resistant oil is verified through a hydrolytic stability test; evaluating the change condition of the viscosity of the lubricating oil along with the temperature in the environment of-10 DEG C to 100 DEG C; judging the later operation maintenance performance of the fire-resistant oil through an aging regeneration test; carrying out an irradiation resistance test on the fuel oil, and judging the influence degree of the physiological indexes of the fuel oil in an irradiation environment; carrying out a continuous operation test on the fire-resistant oil carrying a sliding bearing and a lubricating oil system on the simulation rack, monitoring related equipment parameters and oil product indexes, and judging the use function of the fire-resistant oil; and establishing a comprehensive performance evaluation model, endowing different indexes with corresponding weight indexes according to the results of the steps, and carrying out weighted calculation to obtain the comprehensive performance score of the fire-resistant oil. The method is simplified in process, high in detection accuracy and efficiency and low in detection cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear electrochemistry analysis, and particularly relates to a method for verifying the performance of fire-resistant oil used in a lubricating system of industrial equipment. BACKGROUND

[0002] In the power and petrochemical industries, fire-resistant oil is widely used in electro-hydraulic regulating systems, and its performance is directly related to the safe and stable operation of the system. At present, the existing fire-resistant oil test methods have many defects, and some traditional test methods can only detect a single performance of fire-resistant oil. For example, the technology disclosed in the "Guidelines for Operation and Maintenance of Phosphate Ester Fire-Resistant Oil for Power Plants" (DL / T571-2014) only detects single indicators such as acid value, kinematic viscosity, foam characteristics, and air release value of fire-resistant oil, and cannot meet the demand for comprehensive performance evaluation. For fire-resistant oil used in lubricating oil systems, especially for nuclear island equipment, there is a blank in the verification method of fire-resistant oil for such application scenarios, which cannot meet the needs of domestic substitution. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a method for verifying the performance of fire-resistant oil used in a lubricating system of industrial equipment, which can comprehensively detect various performance indicators of fire-resistant oil used in a lubricating oil system of nuclear island equipment, simplify the detection process, reduce the detection cost, and improve the detection accuracy and efficiency of the test method to meet the comprehensive performance evaluation and technical judgment of the substitute oil and the original oil.

[0004] The present application provides a method for verifying the performance of fire-resistant oil used in a lubricating system of industrial equipment, comprising the following steps:

[0005] Step 1: Perform full-item index analysis and detection according to relevant technical index analysis standards to determine the technical performance of the fire-resistant oil;

[0006] Step 2: Verify the degradation degree and change trend of the fire-resistant oil after aging through oxidation stability test;

[0007] Step 3: Verify the hydrolysis resistance of the fire-resistant oil through hydrolysis stability test;

[0008] Step 4: Evaluate the viscosity change of the lubricating oil with temperature in the environment of-10℃-100℃;

[0009] Step 5: Determine the post-operation and maintenance performance of the fire-resistant oil through aging and regeneration test;

[0010] Step 6: Perform radiation resistance test on the fire-resistant oil to determine the degree of influence of physiological indicators in the radiation environment;

[0011] Step 7: Perform continuous running test on the anti-flame oil with sliding bearing and lubricating oil system on a simulation bench, and monitor related equipment parameters and oil indicators to determine the use function of the anti-flame oil;

[0012] Step 8: Establish a comprehensive performance evaluation model, and according to the results of the above steps, give corresponding weight indexes to different indicators, and obtain the comprehensive performance score of the anti-flame oil through weighted calculation.

[0013] In a specific embodiment of the present application, the oxidation stability test in step 2 includes open cup aging test and closed cup aging test.

[0014] In a specific embodiment of the present application, the open cup aging test specifically includes:

[0015] The 2000 ppm deteriorated phosphate ester anti-flame oil is added into the anti-flame oil, stirred and mixed uniformly, and 5000 ppm deionized water is added and dispersed uniformly to obtain an oil sample; the acid value of the deteriorated phosphate ester anti-flame oil is 0.15 mgKOH / g.

[0016] The oil sample is loaded into an open cup, the total weight of the oil sample and the open cup is weighed, the initial acid value, viscosity and FTIR spectrum of the oil sample are measured;

[0017] The pretreated steel sheet is vertically inserted into the oil sample, avoiding contact with the cup wall;

[0018] The open cup loaded with the steel sheet and the oil sample is tested at 150 DEG C, and the test time is 930-936 hours;

[0019] The steel sheet is taken out, and the rust grade is evaluated; the oil sample is filtered, the insoluble substances are separated and weighed; the final acid value, viscosity and FTIR spectrum are measured;

[0020] The closed cup aging test specifically includes:

[0021] The 2000 ppm deteriorated phosphate ester anti-flame oil is added into the anti-flame oil, stirred and mixed uniformly, and 5000 ppm deionized water is added and dispersed uniformly to obtain an oil sample; the acid value of the deteriorated phosphate ester anti-flame oil is 0.15 mgKOH / g.

[0022] The oil sample is loaded into a closed cup, and after the air in the cup is replaced with nitrogen, the closed cup is sealed, the total weight of the oil sample and the closed cup is weighed, and the initial acid value, viscosity and FTIR spectrum of the oil sample are measured;

[0023] The pretreated steel sheet is vertically inserted into the oil sample, avoiding contact with the cup wall;

[0024] The open cup loaded with the steel sheet and the oil sample is tested at 150 DEG C, and the test time is 930-936 hours;

[0025] Take out the steel sheet and evaluate its rust grade; filter the oil sample, separate the insoluble substances and weigh; determine the final acid value, viscosity and FTIR spectrum.

[0026] In one embodiment of the present application, step 3 specifically comprises:

[0027] Add 2000 ppm of deteriorated phosphate ester anti-flame oil into the anti-flame oil, stir and mix uniformly; add 50000 ppm of deionized water, disperse uniformly to obtain an oil sample; the acid value of the deteriorated phosphate ester anti-flame oil is 0.15 mgKOH / g;

[0028] The copper wire coil and the steel sheet are sequentially cleaned with acetone and petroleum ether by ultrasonic cleaning and then dried;

[0029] Take the oil sample and inject it into the reactor, and hang the copper wire coil and the steel sheet in the oil sample;

[0030] Put in a stirring rod and install a condensation reflux pipe;

[0031] Heat the oil sample to 90-100℃, and stir in the oil sample;

[0032] Observe the transparency, stratification or precipitation of the oil sample every day, and check the condensate water reflux;

[0033] Take a sample every week to determine the acid value, moisture content and viscosity;

[0034] After 21 days, terminate the test, take out the copper wire coil and the steel sheet, evaluate the corrosion degree of both, and determine the mass of insoluble substances and the FTIR spectrum.

[0035] In one embodiment of the present application, step 4 specifically comprises:

[0036] Respectively detect the kinematic viscosity at -10℃, 0℃, 10℃, 20℃, 30℃, 40℃, 50℃, 50℃, 60℃, 70℃, 80℃, 90℃ and 100℃, and draw the viscosity-temperature characteristic curve of the anti-flame oil.

[0037] In one embodiment of the present application, step 5 specifically comprises:

[0038] Select the aged anti-flame oil in the oxidation stability test;

[0039] Regenerate by using a strong polar adsorbent, and perform tests with different adsorbent amounts, detect the color, acid value, resistivity and foam characteristics before and after regeneration, and evaluate the regeneration effect of different adsorbent amounts from multiple angles.

[0040] In one embodiment of the present application, step 6 specifically comprises:

[0041] Simulate the radiation condition under the nuclear radiation environment, carry out long-time and high-intensity radiation treatment on the oil product, monitor the changes of the physical and chemical performance indexes of the oil product before and after radiation, and simultaneously, add the sealing member into the fire-resistant oil, and synchronously carry out the radiation resistance test;

[0042] The sealing member material property test includes Shore hardness, hardness, tensile strength, elongation at break, volume change rate and compression permanent deformation, and the fire-resistant oil property indexes include key parameters such as acid value, density, open flash point, kinematic viscosity and air release value.

[0043] In a specific embodiment of the present application, the step 7 specifically comprises:

[0044] The fire-resistant oil is added into the simulation test bench, and the simulation test bench is continuously operated for not less than 3 months.

[0045] The bearing bush temperature, shaft vibration and oil temperature are monitored in real time, the acid value, viscosity, moisture and particle contamination of the fire-resistant oil are detected every week;

[0046] The oil film carrying capacity, the correlation between the lubricating oil flow and the bush temperature are evaluated, the oil film stiffness and the damping coefficient are tested through the excitation test, the stability is analyzed, the critical speed and the vibration spectrum are measured, and the inhibition effect of the fire-resistant oil on the rotor vibration is judged.

[0047] After the test is terminated, the bush wear and the deposition adhesion are observed, the oxidation / hydrolysis products of the fire-resistant oil are analyzed by FTIR, and the metal content is detected.

[0048] The test data are compared with the test aging results, and the performance attenuation model is established.

[0049] In a specific embodiment of the present application, in the step 8, the weight of the fire-resistant oil overall analysis is 10%, the weight of the oxidation stability is 15%, the weight of the hydrolysis stability is 15%, the weight of the viscosity-temperature characteristic is 10%, the weight of the aging and regeneration test is 10%, the weight of the radiation resistance test is 10%, and the weight of the test bench test is 30%.

[0050] Compared with the prior art, the performance verification method of the fire-resistant oil for the industrial equipment lubrication system has the following beneficial effects:

[0051] (1) The present application can simultaneously detect the technical indexes, oxidation, hydrolysis stability, viscosity-temperature characteristic, regeneration performance, radiation resistance and other key performance indexes of the fire-resistant oil, compared with the prior art single performance detection method, the present application can provide more comprehensive data support for the performance evaluation of the fire-resistant oil, and effectively avoid the system failure risk caused by the undetected partial performance indexes.

[0052] (2) By optimizing the detection process, a plurality of detections are concentrated in the same experimental environment, reducing sample transfer and equipment switching time, so that the entire detection period is shortened by more than 40% compared with the traditional method. At the same time, the detection equipment and common chemical reagents are used, which reduces the cost of detection equipment and reagents;

[0053] (3) In the detection process, the detection environment conditions are strictly controlled, the key detection steps are repeatedly measured and averaged, and a scientific comprehensive evaluation model is established, which effectively improves the accuracy and reliability of the detection results, and the detection error is reduced by more than 30% compared with the existing method. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 A flowchart showing a verification method for the performance of fire-resistant oil for industrial equipment lubrication system. DETAILED DESCRIPTION

[0055] In order to further understand the present application, the embodiments of the present application are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, but not limiting the present application.

[0056] The embodiments of the present application disclose a verification method for the performance of fire-resistant oil for industrial equipment lubrication system, as shown in Figure 1 The method comprises the following steps:

[0057] Step 1: According to the analysis of the whole index according to the relevant technical index analysis standard, the technical performance of the fire-resistant oil is determined;

[0058] The relevant technical index is "Guidelines for Operation and Maintenance of Phosphate Ester Fire-Resistant Oil for Power Plants" (DL / T5712014). According to the requirements of "Guidelines for Operation and Maintenance of Phosphate Ester Fire-Resistant Oil for Power Plants", the whole technical index analysis is carried out to ensure that the quality and composition of the oil meet the requirements of the relevant standards.

[0059] Step 2: The degradation degree and change trend of the fire-resistant oil after aging are verified by oxidation stability test; the oxidation stability test includes open cup aging test and closed cup aging test;

[0060] The open cup aging test specifically includes:

[0061] 2000 ppm of degraded phosphate ester fire-resistant oil is added to the fire-resistant oil, and stirred and mixed uniformly; 5000 ppm of deionized water is added and dispersed uniformly to obtain an oil sample; the acid value of the degraded phosphate ester fire-resistant oil is 0.15 mgKOH / g;

[0062] The oil sample is loaded into an open cup, the total weight of the oil sample and the open cup is weighed, and the initial acid value, viscosity and FTIR spectrum of the oil sample are measured;

[0063] The pretreated steel sheet is vertically inserted into the oil sample, avoiding contact with the cup wall; the size of the steel sheet is 25mmx25mmx2.5mm;

[0064] The open cup containing the steel sheet and the oil sample is subjected to the test at 150℃, and the test time is 930-936 hours;

[0065] The steel sheet is taken out, and the rust grade thereof is evaluated; the oil sample is filtered, and the insoluble substances are separated and weighed; the final acid value, viscosity and FTIR spectrum are measured;

[0066] The closed cup aging test specifically comprises:

[0067] The deteriorated phosphate ester fire-resistant oil is added into the fire-resistant oil at 2000ppm, and is stirred and mixed uniformly; deionized water is added at 5000ppm, and is dispersed uniformly to obtain the oil sample; the acid value of the deteriorated phosphate ester fire-resistant oil is 0.15mgKOH / g;

[0068] The oil sample is loaded into the closed cup, and is sealed after the air in the cup is replaced by nitrogen; the total weight of the oil sample and the closed cup is weighed, and the initial acid value, viscosity and FTIR spectrum of the oil sample are measured;

[0069] The pretreated steel sheet is vertically inserted into the oil sample, avoiding contact with the cup wall; the size of the steel sheet is 25mmx25mmx2.5mm;

[0070] The open cup containing the steel sheet and the oil sample is subjected to the test at 150℃, and the test time is 930-936 hours;

[0071] The steel sheet is taken out, and the rust grade thereof is evaluated; the oil sample is filtered, and the insoluble substances are separated and weighed; the final acid value, viscosity and FTIR spectrum are measured.

[0072] Step 3: verifying the hydrolysis resistance of the fire-resistant oil through the hydrolysis stability test;

[0073] Specifically comprising:

[0074] The deteriorated phosphate ester fire-resistant oil is added into the fire-resistant oil at 2000ppm, and is stirred and mixed uniformly; deionized water is added at 50000ppm, and is dispersed uniformly to obtain the oil sample; the acid value of the deteriorated phosphate ester fire-resistant oil is 0.15mgKOH / g;

[0075] The copper wire coil and the steel sheet are sequentially cleaned by ultrasonic cleaning with acetone and petroleum ether, and are dried;

[0076] The oil sample is taken, and the copper wire coil and the steel sheet are hung in the oil sample;

[0077] The stirrer is put in, and the condensation reflux pipe is installed;

[0078] Heat the oil sample to 90-100℃, and stir in the oil sample;

[0079] Daily observation of oil sample transparency, delamination or precipitation, check the condensate backflow;

[0080] Weekly sampling to determine the acid value, moisture content and viscosity;

[0081] 21 days after the end of the test, take out the copper coil and steel sheet, evaluate the corrosion degree of the two, and measure the mass and FTIR spectrum of the insoluble matter.

[0082] By combining factors, simulate severe use environment, accelerate oil quality deterioration, and verify the use performance of the hydrolyzed anti-flame oil.

[0083] Step 4: Evaluate the viscosity of the lubricating oil at-10℃-100℃ environment as the temperature changes;

[0084] Specifically includes:

[0085] Respectively according to-10℃, 0℃, 10℃, 20℃, 30℃, 40℃, 50℃, 50℃, 60℃, 70℃, 80℃, 90℃, 100℃ kinematic viscosity detection, draw the viscosity-temperature characteristic curve of the anti-flame oil.

[0086] If there are multiple samples, draw the viscosity-temperature characteristic curve respectively, and compare the curve characteristics to determine whether the change trend of different samples is consistent.

[0087] Since the viscosity-temperature characteristic is a characteristic index reflecting the change of oil viscosity with temperature, it is a core parameter of the lubricating oil quality evaluation system and the anti-flame oil is suitable for lubricating system, therefore, the viscosity-temperature characteristic is introduced to evaluate the viscosity of the lubricating oil at-10℃-100℃ environment as the temperature changes, so as to ensure that the kinematic viscosity has high stability under various temperature conditions.

[0088] Step 5: Determine the late operation and maintenance performance of the anti-flame oil through aging and regeneration test;

[0089] Specifically includes:

[0090] Select 200ml of anti-flame oil with acid value of 0.5mgKOH / g after 150℃ open cup aging in oxidation stability test, and synchronously add 2% and 4% adsorbent of strong polar silicon aluminum adsorbent according to the oil sample, and regenerate by stirrer for 30min, detect the color, acid value, resistivity, foam characteristics and other indexes before and after regeneration, and evaluate the regeneration effect of different adsorbent doses from multiple angles.

[0091] Properties of the anti-flame oil after regeneration treatment:

[0092] Color: ≤400 APHA;

[0093] Acid value: ≤0.04 mgKOH / g;

[0094] Resistivity: ≥1 x 10 10 Ω.cm;

[0095] Foam characteristics (93.5°C): ≤10 / 0 mL / mL.

[0096] Step 6: Irradiation resistance test is carried out on the anti-flame oil to determine the degree of influence of main physical and chemical indicators in the irradiation environment;

[0097] Specifically includes:

[0098] The radiation conditions in the simulated nuclear irradiation environment are simulated, and the oil is subjected to long-time and high-intensity radiation treatment, and the changes in the physical and chemical performance indicators before and after irradiation are monitored. At the same time, common sealing materials can be added to the anti-flame oil, and the irradiation resistance test is carried out simultaneously. The compatibility with the sealing material is investigated according to the corresponding methods specified in GB / T 1690 and GB / T 14832.

[0099] Pre-irradiation test. The sealing material is sampled and the anti-flame oil is sampled, and the physical properties of the sealing material and the anti-flame oil are tested. The sealing material property test includes Shore hardness, hardness (micro), tensile strength, elongation at break, volume change rate, compression permanent set. The key parameters of the anti-flame oil property indicators include acid value, density, open flash point, kinematic viscosity, air release value.

[0100] Irradiation test. The anti-flame oil is sampled and the sealing material is sampled, and the volume is not less than 1000 ml. Enclosed in a sealed steel container, end of cobalt source direct irradiation, cumulative irradiation dose 7.5 x 10 8 rad.

[0101] Post-irradiation test. The anti-flame oil and the sealing material are subjected to physical property and compatibility detection according to the aforementioned requirements and methods.

[0102] Characteristics of the sealing material before and after irradiation

[0103] ① Shore hardness: 75±5 Shore A;

[0104] ② Hardness (micro) 75±3 IRHD;

[0105] ③ Tensile strength: ≥13 MPa;

[0106] ④ Elongation at break: ≥160%;

[0107] ⑤ Volume change rate: ≤1%;

[0108] ⑥ Compression permanent set: ≤20%.

[0109] Properties of fire-resistant oil before and after irradiation

[0110] ① Acid value: Δ ≤ 0.15 mgKOH / g;

[0111] ② Density (20℃): ≤ 1170 kg / m 3 ;

[0112] ③ Open flash point: ≥ 240℃;

[0113] ④ Kinematic viscosity: Δ ≤ ± 10%;

[0114] ⑤ Air release value: ≤ 6 min.

[0115] Step 7: Perform continuous running test on the fire-resistant oil equipped with sliding bearing and lubricating oil system on the simulation bench, and monitor related equipment parameters and oil indicators to determine the use function of the fire-resistant oil;

[0116] Specifically, it includes:

[0117] Add fire-resistant oil to the simulation bench, and the simulation bench runs continuously for not less than 3 months;

[0118] The bearing simulation of the simulation bench adopts fixed bearing shell structure, and the simulation bench has the following functions:

[0119] ① Static characteristic analysis: including bearing capacity, lubricating oil quantity, shell temperature characteristics and other parameter evaluation;

[0120] ① Dynamic characteristic analysis: involving oil film stiffness, damping characteristics and other dynamic characteristics research;

[0121] ② Rotor dynamics analysis: including critical speed, vibration characteristic evaluation;

[0122] ③ Modal analysis and motor selection: through starting static resistance torque, moment of inertia calculation, determine the modal characteristics of the bearing box, and select the loading unit hydraulic cylinder;

[0123] Control system design: modular design of lubricating oil system, integrated with electric control and interlocking protection function, to ensure test safety;

[0124] Real-time monitoring of bearing shell temperature, shaft vibration, oil temperature, sampling every week, detecting acid value, viscosity, moisture and particle contamination of fire-resistant oil;

[0125] Evaluate the correlation of oil film bearing capacity, lubricating oil flow and shell temperature; test oil film stiffness, damping coefficient through excitation test, analyze stability; measure critical speed, vibration spectrum, judge the inhibition effect of fire-resistant oil on rotor vibration;

[0126] After the test, the bearing bush wear and sediment adhesion were observed, the oxidation / hydrolysis products of the fire-resistant oil were analyzed by FTIR, and the metal content was detected;

[0127] The test data were compared with the test aging results to establish a performance attenuation model.

[0128] Step 8: Establish a comprehensive performance evaluation model, according to the results of the above steps, give corresponding weight index to different indicators, and obtain the comprehensive performance score of the fire-resistant oil through weighted calculation.

[0129] The weight of the overall analysis of the fire-resistant oil is 10%, the weight of the oxidation stability is 15%, the weight of the hydrolysis stability is 15%, the weight of the viscosity-temperature characteristic is 10%, the weight of the aging and regeneration test is 10%, the weight of the radiation resistance test is 10%, and the weight of the bench test is 30%.

[0130] Specifically, the comprehensive performance evaluation is carried out in 7 dimensions of routine overall analysis, oxidation stability test, hydrolysis stability test, viscosity-temperature characteristic test, aging and regeneration test, radiation resistance test and bearing bench test, different ranking of different types of oil can obtain different scores, and the higher the score represents the better performance of the oil. Secondly, different weights are allocated to the 7 dimensions according to the importance, the weight of the overall analysis of the fire-resistant oil is 10%, the weight of the oxidation stability is 15%, the weight of the hydrolysis stability is 15%, the weight of the viscosity-temperature characteristic is 10%, the weight of the aging and regeneration test is 10%, the weight of the radiation resistance test is 10%, and the weight of the bench test is 30%, the ranking score x weight is summarized to obtain the comprehensive score of different oil, and the performance of the oil is judged according to the comprehensive score, and the substitution feasibility is determined.

[0131] The innovation of the present application lies in:

[0132] 1) The overall technical indicators of the fire-resistant oil are analyzed to ensure that the quality of the oil meets the requirements of the relevant standards.

[0133] 2) The conventional open and closed cup aging time is too long, in order to meet the specific requirements of preparing seriously deteriorated regenerated test oil, the test conditions such as temperature, steel sheet and medium are improved to provide test efficiency.

[0134] 3) The viscosity-temperature characteristic evaluation is introduced to verify the lubricating performance of the fire-resistant oil: according to the viscosity change characteristics of the lubricating oil under different temperature conditions, the index requirements of the viscosity-temperature characteristic of the fire-resistant oil are formulated to ensure the lubricating performance of the fire-resistant oil under complex working conditions and meet the requirements of the industrial equipment lubricating system on the adaptability of the oil.

[0135] 4) Introduce aging regeneration experiment to verify the anti-flame oil maintenance performance in later period: through the anti-flame oil regeneration test, the regeneration technology uses strong polarity adsorbent for regeneration treatment, and different adsorbent amount tests are carried out, the color, acid value, resistivity, foam characteristics and other indexes before and after regeneration are detected, the regeneration effect of different adsorbent amount is evaluated from multiple angles, and technical basis is provided for the maintenance and treatment method of anti-flame oil in the subsequent running period in the case of deterioration. The maintenance performance of the oil product is evaluated, and technical basis is provided for the oil maintenance and regeneration utilization of the lubricating oil system of industrial equipment, and the operation cost is further reduced.

[0136] 5) Introduce radiation resistance performance evaluation test to ensure the safety of nuclear industry oil products. There is no relevant test method for the radiation resistance test of anti-flame oil in China. In order to meet the requirements of the radiation resistance test, the radiation resistance performance evaluation test is creatively introduced, including radiation simulation, performance monitoring and data analysis, etc. A scientific and systematic oil product evaluation method is provided for the nuclear power industry, and the safe use of anti-flame oil in the nuclear power environment is ensured.

[0137] 6) In the radiation resistance test, in addition to the radiation detection of anti-flame oil, relevant sealing parts are added at the same time to judge the radiation resistance performance of the sealing parts in the radiation environment and the compatibility of anti-flame oil and sealing parts.

[0138] The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be noted that for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0139] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of verifying the fire resistance performance of an anti- fire oil for an industrial equipment lubrication system, characterized in that, The method comprises the following steps: Step 1: performing full-index analysis detection according to relevant technical index analysis standards to determine the technical performance of the fire-resistant oil; Step 2: verifying the degradation degree and change trend of the fire-resistant oil after aging through an oxidation stability test; Step 3: verifying the hydrolysis resistance of the fire-resistant oil through a hydrolysis stability test; Step 4: evaluating the viscosity change of the lubricating oil with temperature in the environment of-10°C-100°C; Step 5: judging the post-operation maintenance performance of the fire-resistant oil through an aging and regeneration test; Step 6: performing a radiation resistance test on the fire-resistant oil to determine the influence degree of physiological indexes of the fire-resistant oil in a radiation environment; Step 7: performing a continuous operation test on the fire-resistant oil loaded with a sliding bearing and a lubricating oil system on a simulation bench, monitoring related equipment parameters and oil indexes, and determining the use function of the fire-resistant oil; Step 8: establishing a comprehensive performance evaluation model, giving corresponding weight indexes to different indexes according to the results of the above steps, and obtaining the comprehensive performance score of the fire-resistant oil through weighted calculation.

2. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 1, wherein, In the step 2, the oxidation stability test comprises an open cup aging test and a closed cup aging test.

3. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 2, wherein, The open cup aging test specifically comprises: 2000 ppm of deteriorated phosphate ester fire-resistant oil is added into the fire-resistant oil, and stirred and mixed uniformly; 5000 ppm of deionized water is added and dispersed uniformly to obtain an oil sample; the acid value of the deteriorated phosphate ester fire-resistant oil is 0.15 mgKOH / g; The oil sample is loaded into an open cup, the total weight of the oil sample and the open cup is weighed, the initial acid value, viscosity and FTIR spectrum of the oil sample are measured; The pretreated steel sheet is vertically inserted into the oil sample, avoiding contact with the cup wall; The open cup loaded with the steel sheet and the oil sample is tested at 150°C, and the test time is 930-936 hours; The steel sheet is taken out, and the rust grade is evaluated; the oil sample is filtered, the insoluble substances are separated and weighed; the final acid value, viscosity and FTIR spectrum are measured; The closed cup aging test specifically comprises: 2000 ppm of deteriorated phosphate ester fire-resistant oil is added into the fire-resistant oil, and stirred and mixed uniformly; 5000 ppm of deionized water is added and dispersed uniformly to obtain an oil sample; the acid value of the deteriorated phosphate ester fire-resistant oil is 0.15 mgKOH / g; The oil sample is loaded into a closed cup, and the total weight of the oil sample and the closed cup is weighed after the air in the cup is replaced with nitrogen and sealed, the initial acid value, viscosity and FTIR spectrum of the oil sample are measured; The pretreated steel sheet is vertically inserted into the oil sample, avoiding contact with the cup wall; The open cup loaded with the steel sheet and the oil sample is tested at 150°C, and the test time is 930-936 hours; The steel sheet is taken out, and the rust grade is evaluated; the oil sample is filtered, the insoluble substances are separated and weighed; the final acid value, viscosity and FTIR spectrum are measured.

4. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 1, wherein, The step 3 specifically comprises: 2000 ppm of deteriorated phosphate ester fire-resistant oil is added into the fire-resistant oil, and stirred and mixed uniformly; 50000 ppm of deionized water is added and dispersed uniformly to obtain an oil sample; the acid value of the deteriorated phosphate ester fire-resistant oil is 0.15 mgKOH / g; The copper wire coil and the steel sheet are sequentially cleaned with acetone and petroleum ether by ultrasonic cleaning and then dried; The oil sample is taken and injected into a reactor, and the copper wire coil and the steel sheet are hung in the oil sample; Put in the stirrer, install the condensation reflux tube; Heat the oil sample to 90-100°C, and stir in the oil sample; Observe the transparency, stratification or precipitation of the oil sample every day, and check the condensate reflux; Take samples every week to measure the acid value, moisture content and viscosity; After 21 days, terminate the test, take out the copper wire coil and steel sheet, evaluate the corrosion degree of both, measure the mass of insoluble substances and FTIR spectrum.

5. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 1, wherein, The step 4 specifically comprises: Respectively detect the kinematic viscosity at-10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, 50°C, 60°C, 70°C, 80°C, 90°C and 100°C, and draw the viscosity-temperature characteristic curve of the fire-resistant oil.

6. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 1, wherein, The step 5 specifically comprises: Select the aged fire-resistant oil in the oxidation stability test; Regenerate the fire-resistant oil by using a strong polar adsorbent, and perform tests with different adsorbent amounts, detect the color, acid value, resistivity and foam characteristics of the fire-resistant oil before and after regeneration, and evaluate the regeneration effect of different adsorbent amounts from multiple angles.

7. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 1, wherein, The step 6 specifically comprises: Simulate the radiation conditions in a nuclear radiation environment, perform long-time and high-intensity radiation treatment on the oil, monitor the changes of the physicochemical performance indexes before and after radiation, and simultaneously perform a radiation resistance test by adding a sealing element to the fire-resistant oil; The sealing element material property test includes Shore hardness, hardness, tensile strength, elongation at break, volume change rate and compression permanent set, and the fire-resistant oil property index includes key parameters such as acid value, density, open flash point, kinematic viscosity and air release value.

8. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 1, wherein, The step 7 specifically comprises: Put the fire-resistant oil into the simulated test bench, and continuously run the test bench for not less than 3 months; Real-time monitor the bearing shell temperature, shaft vibration and oil temperature, take samples every week, and detect the acid value, viscosity, moisture content and particle contamination of the fire-resistant oil; Evaluate the oil film carrying capacity, the correlation between the lubricating oil flow and the shell temperature, test the oil film stiffness and damping coefficient through excitation test, analyze the stability, measure the critical speed and vibration spectrum, and judge the inhibition effect of the fire-resistant oil on rotor vibration; After terminating the test, observe the shell wear and deposit adhesion, perform FTIR analysis on the oxidation / hydrolysis products of the fire-resistant oil, and perform metal content detection; Compare the test data with the test aging results, and establish a performance attenuation model.

9. The method of verifying the performance of a fire resistant oil for use in an industrial equipment lubrication system of claim 1, wherein, In the step 8, the weight of the fire-resistant oil overall analysis is 10%, the weights of oxidation stability, hydrolysis stability, viscosity-temperature characteristic, aging and regeneration test, radiation resistance test and test bench test are 15%, 15%, 10%, 10%, 10% and 30% respectively.

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