A oil temperature measurement method based on oil pipe surface temperature measurement

Abstract

The invention relates to an oil temperature measurement method based on oil tube surface temperature measurement. The method comprises a step of using an oil temperature measurement device to measure oil tube outer wall temperature to obtain oil tube outer wall actual temperature, a step of dividing the heat transfer of a hydraulic oil tube into an oil tube outer wall, an oil tube wall body and an oil tube inner wall to carry out analysis and modeling, and a step of obtaining the measurement model of oil liquid temperature, using the received data information of a computer CPU module, calculating the current oil liquid temperature through a final measurement model and realizing the non-contact measurement of hydraulic oil tube internal oil temperature. Compared with the prior art, the disassembly of the hydraulic oil tube is not needed, only the measurement of the temperature of an oil tube surface and ambient temperature is needed, the oil liquid temperature at present is calculated through an oil liquid temperature measurement model, the non-intrusive measurement of oil temperature is realized, and the safety and convenience of measurement are raised; the measurement accuracy is high, the measurement range is large, the response time is short, the large mechanical vibration and mechanical and hydraulic shock can be withstood, and the anti-interference ability is good.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement, and relates to a method for measuring surface temperature, in particular to an oil temperature measurement method based on oil pipe surface temperature measurement. Background technique [0002] In large-scale equipment such as lifting equipment, reloading and transportation equipment, and construction machinery, the hydraulic system is the core mechanism of transmission and control, and the oil temperature is an important parameter of the hydraulic system. The oil temperature usually increases with the continuous working time of the hydraulic system. When the oil temperature is too high, it will lead to problems such as lower oil viscosity, increased leakage, increased wear of hydraulic components, and aging and deterioration of sealing devices. Therefore, it is often The oil temperature needs to be controlled within a certain range. Temperature sensors such as thermocouples and...

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Problems solved by technology

Duan Tianjiao and Cao Keqiang from the Air Force Engineering University published "Simulation of a Certain Type of Aircraft Hydraulic System Based on AMESim" in the 7th issue of "Machine Tools and Hydraulics" in 2009. model, to simulate the temperature model of the hydraulic system, there is also no actual test and experimental verification

[0010] 7), Zhang Zhiyou and Yao Huaixin of Xi'an Highway Jiaotong University published "Calculation of Oil Temperature in Closed Hydraulic System" in the 80th issue of "Construction Machinery and Construction Mechanization" in 1999. Based on the temperature factor, the calculation method of the internal oil temperature of the closed hydraulic system has been theoretically discussed, but the oil temperature model and measurement method have not been studied.

[0012] So far, after searching the literature, we have not found a mechanism analysis and oil temperature measurement model for the radial heat transfer of oil in the oil pipe through the oil pipe, nor have we found a method that is easy to install and can measure relatively small pipe diameter Method and device for hydraulic oil pipe temperature

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