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Rotor temperature measurement simulated system and method for low-temperature centrifugal type fluid machine

A fluid machinery, rotor temperature technology, applied in low temperature temperature measurement, temperature measurement of moving solids, thermometers, etc., can solve the problem of inability to measure rotor temperature, and achieve the effect of being beneficial to the design of thermal insulation structures

Active Publication Date: 2019-08-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above problems, the present invention proposes a rotor temperature measurement simulation system and method of a low-temperature centrifugal fluid machine, which solves the problem that the rotor temperature cannot be measured at low temperature

Method used

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  • Rotor temperature measurement simulated system and method for low-temperature centrifugal type fluid machine
  • Rotor temperature measurement simulated system and method for low-temperature centrifugal type fluid machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 Test the influence of inlet medium temperature on fluid machine 2 rotor temperature

[0050] Turn on the power fluid machinery 5 and the refrigerator 1, and the system begins to cool down. When the cooling capacity provided by the refrigerator 1 balances with the system leakage heat, the temperature of the inlet temperature measuring point 16.6 drops to the lowest value, and the rotor temperature is measured. Maintain the electric power of the stator electric heating wire 10, the rotor electric heating wire 11, the upper rotor bearing 12.1 and the lower rotor bearing 12.2 electric heating fins to be constant, turn on the heater 6 and set the heating power. As the thermal load of the system increases, the temperature of the inlet temperature measuring point 16.6 will rise at this time, and it will stabilize after a period of time, so measure the rotor temperature again. Then, the heating power of the heater 6 is changed, and the test of the same step is performed....

Embodiment 2

[0051] Example 2 Test the influence of the internal heat of the motor on the temperature of the rotor of the fluid machine 2

[0052] Adjust the electric heating power of the stator electric heating wire 10, the rotor electric heating wire 11, the upper rotor bearing 12.1 and the lower rotor bearing 12.2 electric heating plate to the maximum value, turn on the power fluid machine 5 and the refrigerator 1, and the system starts to cool down. When the cooling capacity provided by the machine 1 is balanced with the system leakage heat, the temperature of the inlet temperature measuring point 16.6 drops to the lowest value, and the rotor temperature is measured. After that, reduce the heating wire and heater power in the motor, and the thermal load of the system is reduced. Therefore, the temperature of the inlet temperature measuring point 16.6 will be further reduced, but for the control variable, that is, to keep the temperature of the inlet temperature measuring point 16.6 unchang...

Embodiment 3

[0053] Example 3 Test the influence of the position of the heat sink on the temperature of the fluid machine 2 rotor

[0054] Turn on the power fluid machinery 5 and the refrigerator 1, and the system begins to cool down. When the cooling capacity provided by the refrigerator 1 balances with the system leakage heat, the temperature of the inlet temperature measuring point 16.6 drops to the lowest value, and the rotor temperature is measured. Keep the electric power of the stator electric heating wire 10, the rotor electric heating wire 11, the upper rotor bearing 12.1 and the lower rotor bearing 12.2 electric heating fins constant, change the axial position of the heat sink 13, and the axial temperature distribution of the rotor has changed at this time , The thermal load of the system also changes accordingly. The temperature at the inlet temperature measuring point 16.6 will also be slightly different. Adjust the heating power of the heater 6 to keep the temperature at the inlet...

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Abstract

The invention discloses a rotor temperature measurement simulated system and method for a low-temperature centrifugal type fluid machine. The system comprises a refrigerator, the centrifugal type fluid machine to be measured, a flowmeter, a flow control valve, a dynamic fluid machine and a heater connected via pipes. The refrigerator serves as a cold source, the dynamic fluid machine provides circulating power for a medium in the system, and a rotor of the centrifugal type fluid machine to be measured is kept static. The system can measure the rotor temperature when the centrifugal type fluidmachine transmits the low-temperature working medium, the complete internal temperature field and an axial heat leak can be obtained, and help is provided for design of a heat insulation structure ofthe whole machine.

Description

Technical field [0001] The invention relates to the technical field of rotor temperature measurement of fluid machinery, in particular to a rotor temperature measurement simulation system and method of low-temperature centrifugal fluid machinery. Background technique [0002] With the continuous development of cryogenic engineering, cryogenic centrifugal fluid machinery has begun to be widely used in helium cryogenic systems in air separation, aerospace and large scientific projects, including liquid oxygen pumps in the 90K temperature zone and liquid nitrogen pumps in the 77K temperature zone , 40K temperature zone helium circulation fan, 20K temperature zone liquid hydrogen pump and 4K temperature zone helium cold compressor, etc. The main difference between cryogenic fluid machinery and room temperature fluid machinery is that cryogenic fluid machinery has very high requirements for thermal insulation performance, because the impeller side of the rotor is in a low temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/00G01K13/08
CPCG01K13/006G01K13/08
Inventor 孙大明苏峙岳
Owner ZHEJIANG UNIV
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