A kind of mine card wheel edge reducer lubricating oil

Abstract

The present application relates to the technical field of lubricating oil, and more particularly to a mine truck wheel edge reducer lubricating oil. The lubricating oil comprises the following components in mass fraction: CTL base oil, high-pressure sulfur olefin, atmospheric sulfur olefin, benzene triazole derivative, phosphoric acid trimethyl phenol ester, triphenyl phosphorothioate, acidic phosphate ester octadecylamine salt, boron phosphate ester hexadecylamine salt, antirust agent, boronized ashless dispersant, phenolic antioxidant and amine antioxidant. The present application not only reaches the performance level of international top products, but also realizes improvement in key actual working condition adaptability, long-term stability and comprehensive protection capability, thereby providing a high-efficiency, stable, long-service-life and energy-saving lubricating solution for mine wheel edge reducers.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil technology, and more specifically, to a lubricating oil for a mining truck wheel-side reducer. Background Technology

[0002] As a core transmission component of heavy mining equipment, the stable and reliable operation of the mining wheel-side reducer directly affects the overall production efficiency and service life of the equipment. In actual working conditions, this reducer operates under extremely harsh environments characterized by high loads, strong impacts, high dust levels, and humidity. This places extremely stringent performance requirements on the lubricating oil used. While traditional lubricating oils are widely used in general industrial gear lubrication, their performance shortcomings become increasingly apparent when dealing with the special conditions of mining. These shortcomings are mainly manifested in insufficient resistance to micropitting, limited extreme pressure anti-wear properties, and inadequate chemical stability and oil film strength retention at high temperatures. This leads to early micropitting and macro-wear on the gear surface of the wheel-side reducer, and the oil film is prone to rupture under high impact loads, thus accelerating gear fatigue failure and damage to the transmission system, severely impacting equipment uptime and total life-cycle operating costs.

[0003] With the expansion of mining scale and the iteration of equipment technology, mining equipment is developing towards ultra-high power, ultra-high reliability, and ultra-long maintenance cycles. The extreme heavy loads, severe impacts, and environmental factors such as dust and moisture in actual operation make the lubrication conditions faced by transmission components increasingly demanding. Traditional gear oils are gradually proving inadequate in dealing with micro-pitting fatigue damage on gear surfaces and wear protection under extreme pressure. Therefore, the industry has raised unprecedentedly high standards for the comprehensive performance of lubricating oils for mining wheel-side reducers, especially in terms of synergistic protection against micro-pitting and extreme pressure wear. This background urgently requires breakthroughs in lubrication technology to develop high-performance specialized lubricating oils that can adapt to the extreme working conditions of modern mines and possess multiple protective functions, in order to ensure the long-term, stable, and reliable operation of mining equipment transmission systems in harsh environments. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one aspect of the present invention is to provide a lubricating oil for a mining truck wheel-side reducer, the lubricating oil comprising the following components in parts by weight: 97-98.5 parts of CTL base oil, 0.05-0.1 parts of high-pressure thiophene, 0.05-0.1 parts of normal-pressure thiophene, 0.03-0.05 parts of benzotriazole derivative, 0.1-0.2 parts of tricresyl phosphate, 0.1-0.2 parts of triphenyl thiophosphate, 0.1-0.2 parts of acidic phosphate octadecylamine salt, 0.02-0.05 parts of boronized phosphate hexadecylamine salt, 0.03-0.05 parts of rust inhibitor, 0.02-0.05 parts of boronized ashless dispersant, 0.5-1 parts of phenolic antioxidant and 0.5-1 parts of amine antioxidant.

[0005] Preferably, the benzotriazole derivative has the following structural formula: .

[0006] Preferably, the method for preparing the acidic phosphate octadecylamine salt is as follows: 10g of phosphorus pentoxide is weighed and placed in a 100mL high-pressure reactor, and 60.0g of isooctadecyl alcohol is added dropwise. After sealing the tube, it is placed in the high-pressure reactor and subjected to an adsorption reaction at 80°C under nitrogen protection at 0.5MPa for 4 hours. 60g of octadecylamine is added to the mixture, and then the reaction solution is transferred to a 100mL high-pressure reactor at 130°C. The mixture is magnetically stirred and heated for 4 hours. The reaction solution is cooled to room temperature, and the liquid is retained by vacuum filtration to obtain the acidic phosphate octadecylamine salt.

[0007] Preferably, the rust inhibitor comprises any one of dodecenyl succinic acid (T746), heptadecanyl imidazolinyl succinate (T703), dodecenyl succinate half ester (T747), dodecenyl succinate ester, and oleoyl sarcosine octadecylamine salt (T711).

[0008] Preferably, the boronized ashless dispersant includes any one of boronized polyisobutylene bis(succinimide) KT 1354B (T154B), boronized polyisobutylene bis(succinimide) KT 1054B, boron-phosphorized polyisobutylene bis(succinimide) KT 1356PB, boronized high molecular weight polyisobutylene bis(succinimide) KT 1961B (T161B), and boronized high molecular weight polyisobutylene bis(succinimide) KT1962B (T161B).

[0009] Preferably, the phenolic antioxidant includes either antioxidant T501 (2,6-di-tert-butyl-p-methylphenol) or antioxidant 1135 (antioxidant L135, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate isooctyl ester).

[0010] Preferably, the amine antioxidant includes any one of BASF IRGANOX L06, antioxidant JYANOX-L67 nonyl-N-(nonylphenyl)diphenylamine, and IRGANOX L57 (liquid octylbutyldiphenylamine antioxidant).

[0011] The beneficial effects of this invention are as follows:

[0012] First, it achieves optimized transmission efficiency and energy-saving breakthroughs. In ultra-high torque and long-term rigorous testing, the formula of this invention demonstrates world-class transmission efficiency. Especially when simulating actual heavy-load complex working conditions (such as counterclockwise operation), its efficiency performance even surpasses that of top international brands. This directly proves that this invention can provide more stable and better tribological performance under high load and bidirectional operation conditions, effectively reduce the internal power loss of the transmission system, bring direct fuel (or electricity) savings to heavy mining equipment, and reduce the ineffective heat load caused by energy loss.

[0013] Secondly, it possesses excellent thermal management capabilities and long-term high-temperature stability. The formula of this invention achieved the lowest operating temperature in the entire test bench, significantly reducing the operating temperature of key transmission components. This not only reduces the risk of oil oxidation and deterioration caused by high temperatures and extends the life of the oil itself, but more importantly, it provides a milder working environment for internal seals, bearings, etc. of the reducer, improving component reliability. The stability of kinematic viscosity and extremely low copper strip corrosion level in real vehicle tracking further confirm its excellent anti-oxidation, anti-corrosion, and performance retention capabilities under long-term high-temperature conditions, providing a core guarantee for achieving and exceeding the goal of long oil change intervals.

[0014] Third, it provides ultimate wear protection and a proven ultra-long service life. Under extreme heavy-load real-world vehicle conditions, after up to 3,000 hours of continuous operation, the key wear indicators of the oil (such as iron content) remained at extremely low levels, far exceeding industry warning limits, strongly demonstrating its excellent protective effect on gears and bearings. At the same time, the oil performance indicators (such as kinematic viscosity) remained stable without irreversible degradation, and the condition rating was optimal throughout the entire process. This comprehensively verifies that the formulation of this invention can not only effectively inhibit component wear and prevent early failure, but also ensure the reliability of the oil performance throughout the entire design life, significantly extend equipment maintenance intervals, reduce the total life cycle operation and maintenance costs, and ultimately guarantee equipment uptime and production efficiency.

[0015] In summary, this invention not only achieves the performance level of top international products, but also improves key aspects such as adaptability to actual working conditions, long-term stability, and comprehensive protection capabilities, providing a high-efficiency, stable, long-life, and energy-saving lubrication solution for mining wheel-side reducers.

[0016] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. Attached Figure Description

[0017] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0018] Figure 1 This is a comparison chart of the micropitting test results of lubricating oil in Embodiment 1 and Comparative Example 1 of the present invention;

[0019] Figure 2 This is a comparison chart of the anti-aging test results of lubricating oils in Embodiment 1 of the present invention and Comparative Examples 2, 3 and 4;

[0020] Figure 3 This is a comparison chart of the aging test results of Embodiment 1 of the present invention with those of commercially available lubricating oils SHC 636, SHC680-OHV, and TH680-1;

[0021] Figure 4 This is a comparison curve of the clockwise transmission efficiency of Embodiment 1 of the present invention with that of commercially available lubricating oils SHC 636, SHC680-OHV, and TH680-1.

[0022] Figure 5 This is a comparison curve of the counterclockwise transmission efficiency of Embodiment 1 of the present invention with that of commercially available lubricating oils SHC 636, SHC680-OHV and TH680-1;

[0023] Figure 6 This is a bar chart comparing the clockwise rotational thermal equilibrium temperature of Embodiment 1 of the present invention with that of commercially available lubricating oils SHC 636, SHC680-OHV, and TH680-1.

[0024] Figure 7 This is a bar chart comparing the counterclockwise rotational thermal equilibrium temperature of Embodiment 1 of the present invention with that of commercially available lubricating oils SHC 636, SHC680-OHV, and TH680-1.

[0025] Figure 8 This is a graph showing the change in kinematic viscosity in actual application of Embodiment 1 of the present invention;

[0026] Figure 9 This is a graph showing the change in Fe element content in actual application of Embodiment 1 of the present invention;

[0027] Figure 10 This is a graph showing the change in Si element content in a practical application of Embodiment 1 of the present invention;

[0028] Figure 11 This is a graph showing the change in P element content in actual application of Embodiment 1 of the present invention;

[0029] Figure 12 This is a comparison chart of sampling and rating in actual application of Embodiment 1 of the present invention. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below. Example 1

[0032] A lubricating oil for a mining truck wheel-side reducer comprises 97 parts of CTL base oil, 0.05 parts of high-pressure thiocyanate, 0.05 parts of normal-pressure thiocyanate, 0.03 parts of benzotriazole derivative, 0.1 parts of tricresyl phosphate, 0.1 parts of triphenyl thiophosphate, 0.1 parts of acidic phosphate octadecylamine salt, 0.02 parts of boronized phosphate hexadecylamine salt, 0.03 parts of dodecenyl succinic acid (T746), 0.02 parts of boronized polyisobutylene bis(succinimide) KT 1054B, 0.5 parts of antioxidant 1135, and 0.5 parts of IRGANOX L06. Example 2

[0033] A lubricating oil for a mining truck wheel-side reducer comprises 98 parts of CTL base oil, 0.07 parts of high-pressure thiocyanate, 0.07 parts of normal-pressure thiocyanate, 0.04 parts of benzotriazole derivative, 0.15 parts of tricresyl phosphate, 0.15 parts of triphenyl thiophosphate, 0.15 parts of acidic phosphate octadecylamine salt, 0.04 parts of boronized phosphate hexadecylamine salt, 0.04 parts of dodecenyl succinic acid (T746), 0.03 parts of boronized polyisobutylene bis(succinimide) KT 1054B, 0.7 parts of antioxidant 1135, and 0.7 parts of IRGANOX L06. Example 3

[0034] A lubricating oil for a mining truck wheel-side reducer comprises 98.5 parts of CTL base oil, 0.1 parts of high-pressure thiocyanate, 0.1 parts of normal-pressure thiocyanate, 0.05 parts of benzotriazole derivative, 0.2 parts of tricresyl phosphate, 0.2 parts of triphenyl thiophosphate, 0.2 parts of acidic phosphate octadecylamine salt, 0.05 parts of boronized phosphate hexadecylamine salt, 0.05 parts of dodecenyl succinic acid (T746), 0.05 parts of boronized polyisobutylene bis(succinimide) KT 1054B, 1 part of antioxidant 1135, and 1 part of IRGANOX L06.

[0035] Comparative Example 1

[0036] A lubricating oil for a mining truck wheel-side reducer comprises 97 parts of CTL base oil, 0.05 parts of high-pressure thiocyanate, 0.05 parts of normal-pressure thiocyanate, 0.03 parts of benzotriazole derivative, 0.1 parts of tricresyl phosphate, 0.1 parts of triphenyl thiophosphate, 0.02 parts of boronized phosphate hexadecylamine salt, 0.03 parts of dodecenyl succinic acid (T746), 0.02 parts of boronized polyisobutylene bis(succinimide) KT 1054B, 0.5 parts of antioxidant 1135, and 0.5 parts of IRGANOX L06.

[0037] Comparative Example 2

[0038] A lubricating oil for a mining truck wheel-side reducer comprises 97 parts of CTL base oil, 0.05 parts of high-pressure thiocyanate, 0.05 parts of normal-pressure thiocyanate, 0.03 parts of benzotriazole derivative, 0.1 parts of tricresyl phosphate, 0.1 parts of acidic phosphate octadecylamine salt, 0.03 parts of dodecenyl succinic acid (T746), 0.02 parts of boronized polyisobutylene bis(succinimide) KT 1054B, 0.5 parts of antioxidant 1135, and 0.5 parts of IRGANOX L06.

[0039] Comparative Example 3

[0040] A lubricating oil for a mining truck wheel-side reducer comprises 97 parts of CTL base oil, 0.05 parts of high-pressure thiocyanate, 0.05 parts of normal-pressure thiocyanate, 0.03 parts of benzotriazole derivative, 0.1 parts of tricresyl phosphate, 0.1 parts of triphenyl thiophosphate, 0.1 parts of octadecylamine salt of acidic phosphate, 0.03 parts of dodecenyl succinic acid (T746), 0.02 parts of boronized polyisobutylene bis(succinimide) KT 1054B, 0.5 parts of antioxidant 1135, and 0.5 parts of IRGANOX L06.

[0041] Comparative Example 4

[0042] A lubricating oil for a mining truck wheel-side reducer comprises 97 parts of CTL base oil, 0.05 parts of high-pressure thiocyanate, 0.05 parts of normal-pressure thiocyanate, 0.03 parts of benzotriazole derivative, 0.1 parts of tricresyl phosphate, 0.1 parts of acidic phosphate octadecylamine salt, 0.02 parts of boronized phosphate hexadecylamine salt, 0.03 parts of dodecenyl succinic acid (T746), 0.02 parts of boronized polyisobutylene bis(succinimide) KT 1054B, 0.5 parts of antioxidant 1135, and 0.5 parts of IRGANOX L06.

[0043] Micropitting tests were conducted on the lubricating oils of Example 1 and Comparative Example 1, and the results are as follows: Figure 1 As shown, Figure 1The three lines on the left in the middle are the tooth profile deviation charts for grade 10 without the addition of anti-micropitting additive, where the tooth profile deviation has reached 17.4 (a tooth profile deviation greater than 20 will be judged as failure); the three lines on the right in the middle are the charts for adding 0.2 parts of acidic phosphate amine salt (tooth profile deviation is only 3.9). The above results show that the product has better control capabilities.

[0044] The lubricating oils of Example 1 and Comparative Examples 2, 3, and 4 were subjected to an anti-aging test after high-temperature oxidation for 24 hours. The appearance of the oils was as follows: Figure 2 As shown, left 1 is Comparative Example 2, left 2 is Example 1, left 3 is Comparative Example 3, and left 4 is Comparative Example 4. These can be derived from... Figure 2 It can be seen that trithiobenzene thioate and borophosphate hexadecylamine salt can effectively control oil aging and discoloration, and improve the thermal stability of the product.

[0045] The lubricating oil in Example 1 was compared with commercially available lubricating oils SHC 636, SHC680-OHV, and TH680-1. Table 1 below shows the comparison of the formulation data of each lubricating oil.

[0046] Table 1. Comparison of Lubricating Oil Formulation Data

[0047]

[0048] Example 1 was subjected to an anti-aging test against commercially available lubricating oils SHC 636, SHC680-OHV, and TH680-1, which were oxidized at 150°C for 72 hours. The results are as follows: Figure 3 As shown in Table 1 and Figure 3 It is known that the lubricating oil of this invention has superior low-temperature fluidity; compared with a certain product, it has better demulsification properties, effectively improving the water separation performance of the oil; its micro-pitting performance is comparable to that of SHC680-OHV special wheel-side reducer oil, and is significantly superior to SHC636; it reduces the rate of oil degradation and improves the anti-aging properties of the oil.

[0049] Example 1 was compared with commercially available lubricating oils SHC 636, SHC680-OHV, and TH680-1 on a bench test. The wheel-side reducer test bench consisted of power equipment, monitoring equipment, and wheel-side reducers. Power equipment: two 2000kW ABB motors, frequency converters, and control software; Monitoring system: TI-3 mechanical efficiency meter, WP-D807 temperature monitoring instrument, NJ2-2000Nm torque and speed sensor, and INV3065N2 multi-channel data acquisition and analysis system; Two wheel-side reducers: model KD12001A, rated power: 100kW, rated input speed: 955r / min, rated input torque: 1000Nm, total transmission ratio: 30.16. The results are shown in Table 2 below. Figures 4 to 7 As shown.

[0050] Table 2. Test Oil Tracking Data

[0051]

[0052] When running clockwise, the output torque is 26088 Nm. After 126 minutes of operation, the SHC680-OHV has the highest transmission efficiency at 96.9%; the domestic formulation of TH680-1 has a transmission efficiency of 96.8%; and the domestic formulation of TH680-2 has a transmission efficiency of 96.6%, a difference of 0.3%. When running counterclockwise, the output torque is 26088 Nm. After 126 minutes of operation, the domestic formulation of TH680-2 has the highest transmission efficiency at 96.7%; the corresponding transmission efficiency of SHC680-OHV is 96.5%, a difference of 0.2%. When the main test chamber runs clockwise to thermal equilibrium, the domestic formulation of TH680-2 has the lowest temperature at 56℃; the SHC680-OHV has a temperature of 60℃, a decrease of 4℃. When the main test chamber runs counterclockwise to thermal equilibrium, the domestic formulation of TH680-2 has the lowest temperature at 58℃; the domestic formulation of TH680-2 has a temperature of 63℃, a decrease of 5℃.

[0053] The first embodiment of the present invention is applied in practice to an MT4400AC mining dump truck with a load capacity of 220 tons, an electric drive wheel (model / power) GE B25A2 / 1029kW wheel-side reducer, a transmission ratio of 31.875:1, and a product life of 3000 hours.

[0054] The product viscosity, Fe content, Si content, and P content were tested and rated over time, and the results are as follows: Figures 8 to 12 As shown.

[0055] In summary, the lubricating oil of this invention exhibits stable and excellent comprehensive performance throughout its service life. Its kinematic viscosity remains stable within the design range of 612-748 mm² / s, indicating that the oil matrix has not undergone significant irreversible changes due to shearing or oxidation, and the base oil and viscosity modifier system is stable. In wear metal monitoring, the iron content is controlled at a level far below the conventional oil change standard for industrial gear oils (20 ppm), directly demonstrating excellent anti-wear and extreme pressure protection capabilities, effectively inhibiting wear on gear surfaces and bearings. Regarding corrosion control, the copper strip corrosion level change is far less than level 3, indicating that the oil has good corrosion inhibition capabilities, protecting non-ferrous metal components. It is worth noting that the silicon (Si) content shows a gradual upward trend, suggesting that external dust or wear on seals may continuously intrude into the lubrication system, requiring monitoring of equipment sealing and filtration status. Simultaneously, the phosphorus (P) content shows a slight decrease, which is normal, indicating that some anti-wear / extreme pressure additives are gradually consumed during their protective function.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A lubricating oil for a mining truck wheel-side reducer, characterized in that: The lubricating oil comprises the following components in parts by weight: 97-98.5 parts CTL base oil, 0.05-0.1 parts high-pressure thiophene, 0.05-0.1 parts atmospheric-pressure thiophene, 0.03-0.05 parts benzotriazole derivative, 0.1-0.2 parts tricresyl phosphate, 0.1-0.2 parts triphenyl thiophosphate, 0.1-0.2 parts octadecylamine salt of acidic phosphate, 0.02-0.05 parts hexadecylamine salt of boronized phosphate, 0.03-0.05 parts rust inhibitor, 0.02-0.05 parts boronized ashless dispersant, 0.5-1 parts phenolic antioxidant and 0.5-1 parts amine antioxidant; The method for preparing the acidic phosphate octadecylamine salt is as follows: 10g of phosphorus pentoxide is weighed and placed in a 100mL high-pressure reactor, and 60.0g of isooctadecyl alcohol is added dropwise. After sealing the tube, it is placed in the high-pressure reactor and subjected to an adsorption reaction at 80℃ under nitrogen protection at 0.5MPa for 4 hours. 60g of octadecylamine is added to the mixture, and then the reaction solution is transferred to a 100mL high-pressure reactor at 130℃. The mixture is magnetically stirred and heated for 4 hours. The reaction solution is cooled to room temperature, and the liquid is retained by vacuum filtration to obtain the acidic phosphate octadecylamine salt.

2. The lubricating oil for a mining truck wheel-side reducer according to claim 1, characterized in that: The structural formula of the benzotriazole derivative is as follows: .

3. The lubricating oil for a mining truck wheel-side reducer according to claim 1, characterized in that: The rust inhibitor includes any one of dodecenyl succinic acid, heptadecanyl imidazoline succinate, dodecenyl succinate half ester, dodecenyl succinate ester, and oleoyl sarcosine octadecylamine salt.

4. The lubricating oil for a mining truck wheel-side reducer according to claim 1, characterized in that: The boronized ashless dispersant includes any one of boronized polyisobutylene bis(succinimide) KT 1354B, boronized polyisobutylene bis(succinimide) KT 1054B, boron-phosphorized polyisobutylene bis(succinimide) KT 1356PB, boronized high molecular weight polyisobutylene bis(succinimide) KT 1961B, and boronized high molecular weight polyisobutylene bis(succinimide) KT 1962B.

5. The lubricating oil for a mining truck wheel-side reducer according to claim 1, characterized in that: The phenolic antioxidants include either antioxidant T501 or antioxidant 1135.

6. The lubricating oil for a mining truck wheel-side reducer according to claim 1, characterized in that: The amine-type antioxidant includes any one of IRGANOX L06, antioxidant JYANOX-L67, and IRGANOX L57.

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