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Method for determining high-temperature movement viscosity of lubricating oil

A technology of kinematic viscosity and lubricating oil, applied in the measurement of DC flow characteristics, etc., can solve the problems of large measurement error and inability to meet user requirements, and achieve the effect of meeting development requirements

Active Publication Date: 2012-06-20
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the above reasons, when using the method of GB / T 265 to measure the kinematic viscosity of high-temperature lubricating oil, the measurement error is large, which cannot meet the requirements of users

Method used

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  • Method for determining high-temperature movement viscosity of lubricating oil
  • Method for determining high-temperature movement viscosity of lubricating oil
  • Method for determining high-temperature movement viscosity of lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1: Determination of the kinematic viscosity of KXY aviation lubricating oil at 150°C

[0059] 1. Determine the appropriate Ubbelohde viscometer:

[0060] 1.1. Set the temperature of the constant temperature oil bath to 146.9°C, and the temperature control accuracy of the constant temperature oil bath is ±0.1°C;

[0061] 1.2. Select an Ubbelohde viscometer with a capillary diameter of 0.46 mm as the pre-selected Ubbelohde viscometer, numbered No. 1, and clean the No. 1 viscometer according to the cleaning method specified in Section 4.2 of the national standard GB / T 265 and dry it;

[0062] 1.3. Use n-hexadecane with a purity of 99% to measure the viscosity coefficient c of No. 1 viscometer;

[0063] 1.3.1. Fill the No. 1 viscometer with n-hexadecane: Tilt the No. 1 viscometer with the plumb line at 30°, pour enough n-hexadecane into the bottom storage ball A through the mounting tube L, and The amount of cetane should meet the following conditions: when the...

Embodiment 2

[0079] Embodiment 2: Determination of the kinematic viscosity of KXY aviation lubricating oil at 200°C

[0080] 1. Determine the appropriate Ubbelohde viscometer:

[0081] 1.1. Set the temperature of the constant temperature oil bath to 197.8°C, and the temperature control accuracy of the constant temperature oil bath is ±0.1°C;

[0082] 1.2. Select an Ubbelohde viscometer with a capillary diameter of 0.36 mm as the pre-selected Ubbelohde viscometer, numbered No. 2, and clean the No. 2 viscometer according to the cleaning method specified in Section 4.2 of the national standard GB / T 265 and dry it;

[0083] 1.3. Use n-hexadecane with a purity of 99% to measure the viscosity coefficient c of No. 2 viscometer;

[0084] 1.3.1. Fill the No. 2 viscometer with n-hexadecane: Tilt the No. 2 viscometer with the plumb line at 30°, pour enough n-hexadecane into the bottom storage ball A through the mounting tube L, and The amount of cetane should meet the following conditions: when the...

Embodiment 3

[0100] Embodiment 3: Determination of the kinematic viscosity of KXY aviation lubricating oil at 260°C

[0101] 1. Determine the appropriate Ubbelohde viscometer:

[0102] 1.1. Set the temperature of the constant temperature oil bath to 256.6°C, and the temperature control accuracy of the constant temperature oil bath is ±0.1°C;

[0103] 1.2. Select an Ubbelohde viscometer with a capillary diameter of 0.24 mm as the pre-selected Ubbelohde viscometer, numbered No. 3, and clean the No. 3 viscometer according to the cleaning method specified in Section 4.2 of the national standard GB / T 265 and dry it;

[0104] 1.3. Use n-hexadecane with a purity of 99% to measure the viscosity coefficient c of No. 3 viscometer;

[0105] 1.3.1. Fill the No. 3 viscometer with n-hexadecane: Tilt the No. 3 viscometer with the plumb line at 30°, pour enough n-hexadecane into the bottom storage ball A through the mounting tube L, and The amount of cetane should meet the following conditions: when the...

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Abstract

The invention belongs to the lubricating oil performance determination technology, relating to improvement of a method for determining movement viscosity of lubricating oil. The movement viscosity of the lubricating oil is determined by an Ubbelohde viscometer. The method is characterized in that the method comprises the determination steps as follows: determining proper Ubbelohde viscometer and calculating the movement viscosity vt of the lubricating oil. According to the invention, the movement viscosity of the lubricating oil at 100-260 DEG C. can be accurately determined and design requirements of a novel aeroengine can be satisfied.

Description

technical field [0001] The invention belongs to the technology for measuring lubricating oil performance, and relates to the improvement of the method for measuring the kinematic viscosity of lubricating oil. Background of the invention [0002] As the temperature before the turbine of the aero-engine increases, the temperature of the engine lubrication system also increases, so the requirements for the use temperature of aviation lubricating oil are getting higher and higher. At present, the maximum service temperature of aviation lubricating oil used for aircraft engines in my country is 200°C; the design department proposes a maximum service temperature requirement of 250°C for new aero-engines. Kinematic viscosity is the basic physical-mechanical characteristic of aviation lubricating oil, which directly affects the lubrication state of friction parts, and can characterize the flow of lubricating oil in the lubrication system, low-temperature quick start, cooling, and pr...

Claims

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Application Information

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IPC IPC(8): G01N11/06
Inventor 姜克娟张海娜王彦
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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