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CN-121991737-A - Wide-temperature-range lubricating grease and preparation method and application thereof

CN121991737ACN 121991737 ACN121991737 ACN 121991737ACN-121991737-A

Abstract

The invention belongs to the technical field of lubricating grease, and discloses wide-temperature-range lubricating grease which comprises, by weight, 1-5 parts of ethyl silicone oil, 30-50 parts of diester base oil and 20-40 parts of PAO 4 synthetic base oil, wherein the additive comprises 5-15 parts of a thickening agent, 2-6 parts of an extreme pressure antiwear agent, 1-3 parts of an antioxidant, 1-3 parts of an adhesive and 1-3 parts of an antirust agent.

Inventors

  • WANG LIPING
  • CHU MINGMING
  • CHENG YAZHOU
  • FENG QINGJIAO
  • QIN JUNLONG
  • Jiang Ganquan

Assignees

  • 中国石油天然气股份有限公司
  • 无锡中石油润滑脂有限责任公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (10)

  1. 1. A wide temperature range grease comprising a base oil and an additive, characterized in that the base oil consists of ethyl silicone oil, a diester base oil, and a PAO 4 synthetic base oil: The additive comprises a thickening agent, an extreme pressure antiwear agent, an antioxidant, an adhesive and an antirust agent.
  2. 2. The wide-temperature-range lubricating grease according to claim 1, wherein the base oil comprises, by mass, 1-5 parts of ethyl silicone oil, 30-50 parts of diester base oil and 20-40 parts of PAO 4 synthetic base oil.
  3. 3. The broad temperature range grease of claim 2, wherein the base oil comprises 2-5 parts ethyl silicone oil, 35-45 parts diester base oil, 30-35 parts PAO 4 synthetic base oil.
  4. 4.A wide temperature range grease according to claim 1, characterized in that, The thickener is composed of lithium dodecahydroxystearate and lithium adipate according to the mass ratio of 3.0-5.0:1.0, wherein the mass portion of the thickener is 5-15.
  5. 5. A wide temperature range grease according to claim 1, characterized in that, The weight part of the extreme pressure antiwear agent is 2-6 parts; The extreme pressure antiwear agent consists of thiodibutyl dithiocarbamic acid oxygen molybdenum, dibutyl dithiocarbamic acid antimony, tricresyl phosphate and bismuth sulfide according to the mass ratio of 3.0-5.0:1.0:1.0-3.0:0.1-1.5.
  6. 6. A wide temperature range grease according to claim 1, characterized in that, The antioxidant is 1-3 parts by mass; the antioxidant consists of octylated phenyl-alpha-naphthylamine and diisooctyldiphenylamine according to the mass ratio of 1.0:1.0-3.0.
  7. 7. A wide temperature range grease according to claim 1, characterized in that, The mass part of the adhesive is 1-3 parts; The adhesive consists of polyisobutene and polymethacrylate according to the mass ratio of 1.0:0.5-1.5.
  8. 8. A wide temperature range grease according to claim 1, characterized in that, The mass portion of the antirust agent is 1-3 portions; the antirust agent consists of sorbitan monooleate and benzotriazole in a mass ratio of 1.0:3.0-5.0.
  9. 9. A method of preparing a wide temperature range grease according to any one of claims 1 to 8, comprising the steps of: s1, preparing raw materials according to the proportion of each component, and mixing to prepare base oil; s2, firstly taking part of base oil, adding the base oil into a reaction kettle, heating to 55-65 ℃, adding a thickening agent, sealing the reaction kettle, heating to 145-155 ℃, and mixing at high temperature for 25-35 min; S3, depressurizing the reaction kettle after the mixing is completed, mixing and transferring materials in the reaction kettle and residual base oil to an intermediate kettle, and adding the residual base oil into the intermediate kettle in the cooling process; s4, carrying out reflux shearing in an intermediate kettle, and homogenizing, dispersing and cooling for 120min to 120min And (3) after 130min, when the temperature of the mixture is reduced to 70-80 ℃, sequentially adding an extreme pressure antiwear agent, an antioxidant, an adhesive and an antirust agent, refluxing, uniformly mixing the components, and grinding to obtain the grease with wide temperature range.
  10. 10. Use of a wide temperature range grease according to any one of claims 1-8 in a transmission system.

Description

Wide-temperature-range lubricating grease and preparation method and application thereof Technical Field The invention belongs to the technical field of lubricating grease, and particularly relates to a wide-temperature-range lubricating grease as well as a preparation method and application thereof. Background As one of the three key moving parts of the helicopter, the main function of the transmission system is to transmit power from the engine to the main rotor, tail rotor and other accessories, so that the helicopter can overcome various resistances and realize the preset flying action. Engines are typically mounted horizontally, with the drive train turning their direction of rotation from the output shaft (longitudinal) of the engine to the rotor shaft (vertical) and tail rotor shaft (lateral), enabling the rotor to provide vertical tension and the tail rotor to provide lateral tension. Meanwhile, a free wheel unit is arranged between the input end of the main speed reducer and the output end of the engine, when the rotating speed of the rotor wing is higher than the driving rotating speed of the engine, the rotor wing and the engine are completely separated and freely rotate, and when the engine fails, the rotor wing and the engine can automatically slide down. Therefore, the transmission system needs to bear the aerodynamic load of the main rotor and the tail rotor, and its working environment is extremely severe, so the grease for the helicopter transmission system must have good wide-temperature-range adaptability, excellent shearing resistance, abrasion resistance, impact resistance and adhesion properties, and in the prior art, there is a lack of grease which simultaneously satisfies the above advantages. Disclosure of Invention In order to solve the problem of wide temperature range adaptability of lubricating grease for transmission systems, especially helicopter transmission systems, and excellent shearing resistance, abrasion resistance, impact resistance and adhesion performance. The invention discloses a wide-temperature-range lubricating grease and a preparation method and application thereof. The technical scheme of the invention is as follows: The raw materials of the wide-temperature-range lubricating grease comprise 1-5 parts by weight of ethyl silicone oil, 30-50 parts by weight of diester base oil and 20-40 parts by weight of PAO 4 synthetic base oil: the additive comprises 5-15 parts of thickening agent, 2-6 parts of extreme pressure antiwear agent, 1-3 parts of antioxidant, 1-3 parts of adhesive and 1-3 parts of antirust agent. Further, the base oil of the wide-temperature-range lubricating grease comprises 2-5 parts of ethyl silicone oil, 35-45 parts of diester base oil and 30-35 parts of PAO 4 synthetic base oil. Further, the wide-temperature-range lubricating grease comprises the thickening agent, namely lithium dodecahydroxystearate and lithium adipate according to a mass ratio of 3.0-5.0:1.0. Furthermore, the extreme pressure antiwear agent consists of thiodibutyl dithiocarbamic acid oxygen molybdenum, dibutyl dithiocarbamic acid antimony, tricresyl phosphate and bismuth sulfide according to the mass ratio of 3.0-5.0:1.0:1.0-3.0:0.1-1.5. Furthermore, the antioxidant of the grease with wide temperature range consists of octylated phenyl-alpha-naphthylamine and diisooctyl diphenylamine according to the mass ratio of 1.0:1.0-3.0. Furthermore, the adhesive agent of the wide-temperature-range lubricating grease consists of polyisobutene and polymethacrylate according to the mass ratio of 1.0:0.5-1.5. Further, the wide-temperature-range lubricating grease is characterized in that the antirust agent consists of sorbitan monooleate and benzotriazole according to the mass ratio of 1.0:3.0-5.0. The invention also discloses a preparation method of the wide-temperature-range lubricating grease, which comprises the following steps: s1, preparing raw materials according to the proportion of each component, and mixing to prepare base oil; s2, firstly, adding part of base oil (with the mass ratio of 1/2) into a reaction kettle, and heating to Adding a thickening agent at 55-65 ℃, heating to 145-155 ℃ in a closed reaction kettle, and mixing at high temperature for 25-35 min; s3, depressurizing the reaction kettle after the mixing is finished, quickly heating the product generated in the step S2 to 195-205 ℃, mixing and transferring the materials in the reaction kettle and the residual (with the mass ratio of 1/2) base oil to an intermediate kettle, and adding the residual base oil into the intermediate kettle in the cooling process; S4, carrying out reflux shearing in an intermediate kettle, homogenizing, dispersing and cooling for 120-130 min, sequentially adding an extreme pressure antiwear agent, an antioxidant, an adhesive and an antirust agent when the temperature of the mixture is reduced to 70-80 ℃, then carrying out reflux, uniformly mixing the components, and grinding to obtain the g