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Simulation test and judgment method for water resistance of vehicle gearbox oil additive

A transmission oil and simulation test technology, applied in the field of lubrication, can solve the problems of difficult oil additive water resistance test and evaluation, time-consuming, unfavorable core product technology development and improvement, etc.

Pending Publication Date: 2022-06-03
FUDAN UNIV
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AI Technical Summary

Problems solved by technology

Transmission oil additives have also become one of the categories with higher added value in lubricating products. However, the current simulation test and evaluation method (ASTM D2619-09) for the water resistance of oil additives at home and abroad takes a long time and mainly focuses on acid It is difficult to quickly and accurately test and judge the water resistance of oil additives, which is not conducive to the development and improvement of related core product technologies

Method used

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  • Simulation test and judgment method for water resistance of vehicle gearbox oil additive
  • Simulation test and judgment method for water resistance of vehicle gearbox oil additive
  • Simulation test and judgment method for water resistance of vehicle gearbox oil additive

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Embodiment 1

[0024] figure 1 It is the white unknown substance that appeared on the surface of the material parts after the test of the enterprise, and this kind of white substance appeared on the surface of various material parts. Since the material parts involved in the test include metals, polymers and other materials, and the surfaces of various material parts have white substances deposited, it is preliminarily judged that the white substances are produced by the reaction of the additives in the oil-water mixture with water or in water. Material pieces are irrelevant.

[0025] Add 5000ppm water to this gearbox oil, after simple shaking, you will get the following figure 2 (a) The oil-water mixture shown. A white suspension can be observed after brief ultrasonic dispersion ( figure 2(b)) appears. After further stirring with a mechanical stirrer, ultracentrifugation using a laboratory benchtop centrifuge can be observed at the bottom of the centrifuge tube. image 3 White insolub...

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Abstract

The invention relates to a simulation test for water resistance of a vehicle gearbox oil additive and an evaluation method thereof. The method comprises the following specific steps: confirming the composition and service conditions of the oil product; preliminarily mixing oil and water by adopting ultrasonic dispersion, and observing whether suspended matters are generated in the process; heating the oil-water mixture to a service temperature in a pressure vessel; after centrifuging, observing whether insoluble substances appear at the bottom or not; iCP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) is adopted to analyze the element composition of the By combining the analysis steps, the system judges whether the water resistance of the oil product additive meets the requirement or not and judges the category of the additive with the problem. According to the invention, through systematic analysis of the oil product under the simulated water inlet condition, whether the additive performance meets the requirements is judged, the types of the additives with problems are judged, and an effective basis is provided for selection and compatibility of related additives, so that reliable guarantee is provided for safe and stable operation of related lubricating parts. The method also has a reference value for evaluating the water resistance of oil additives in the fields of electric power, shipping, machinery and the like.

Description

technical field [0001] The invention belongs to the technical field of lubrication, and in particular relates to a simulation test and evaluation method for the water resistance of a gear oil additive, in particular to a simulation test and evaluation method for the water resistance of a vehicle transmission oil additive. Background technique [0002] Automobile gearbox is a gearbox used to convert the speed ratio and direction of movement. Transmission oil is a kind of gear oil used for gearbox gears. In automobiles such as gearboxes, differentials, front and rear axle gears and steering gears play a lubricating role. Under the low temperature outdoors in winter and the high temperature environment in automobile operation, the transmission oil needs to be able to play a predetermined role stably, so it needs to have excellent viscosity-temperature characteristics and thermal oxidation stability. At the same time, the transmission oil also needs to have good bearing capacit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/28G01N33/30G01N1/28G01N1/34G01N1/38
CPCG01N33/2888G01N33/30G01N1/28G01N1/34G01N1/38
Inventor 孙弈开杨振国
Owner FUDAN UNIV
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