High-temperature high-pressure high-shear rate lubricating oil rheometer

Abstract

The invention discloses a high-temperature high-pressure high-shear rate lubricating oil rheometer. The high-temperature high-pressure high-shear rate lubricating oil rheometer comprises a lock nut, a cylinder body, a static torque sensor, a temperature sensor, a splitter plate, a micro-gap measurer, a cylinder cover, a motor frame, a coupling, a rotating shaft sealing device, a rotating shaft, a threaded hole, an outer barrel, an inner barrel, a heater, an inner barrel hole, and the like. When the rheometer runs, the outer barrel rotates, and a lubricating oil sample is subjected to a shearing force, and then the shearing force of the lubricating oil sample acts on the inner barrel according to the principle of force balance; the micro-gap measurer is used for real-time measurement of the gap between the outer barrel and the inner barrel; the temperature sensor, the torque sensor, a pressure gage, a motor speed counter, and the like are connected with a computer, and data information is sent to the computer. Flow curves of the lubricating oil sample are drew by using a specific program in the computer, and constitutive equations of the lubricating oil sample is further determined, so that a relatively accurate lubricating oil rheological model is provided for theory and engineering practice.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a lubricating oil rheometer with high temperature, high pressure and high shear rate. Background technique [0002] Although the rheometers currently on the market are becoming more and more mature, most of the rheometers operate under normal conditions, that is, normal temperature, normal pressure and low shear rate, which are very different from the actual working conditions. The measured data are practical references. Not much value. And some special high shear rate or high pressure viscometers are only aimed at a single environmental factor, excluding the comprehensive influence of multiple environmental factors. [0003] Take a rotational rheometer with a rotating outer cylinder and a fixed inner cylinder as an example. In terms of torque measurement, the dynamic torque sensor measures the torque on the shaft of the outer cylinder. In the process of rotary shearing, in add...

AI Technical Summary

Problems solved by technology

In the existing rheometer, d is pre-designed and fixed, but under the condition of high shear rate, the output shaft of the motor is disturbed, d will produce deviation, and the pre-designed gap size cannot reflect the actual The size of the shear gap during the test will cause errors in the subsequent data calculation process, making the calculation results inaccurate

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