Experimental system for measuring friction loss of high-pressure fluid in rotor-static gap and working method of experimental system
A fluid friction and experimental system technology, applied in measuring devices, testing wear resistance, instruments, etc., can solve the problems of difficult fluid friction loss and bearing friction loss, reduce the prediction accuracy of friction loss model, and reduce the technical difficulty of shaft end sealing. , to achieve the effect of easy operation, eliminating errors and ensuring accuracy
Pending Publication Date: 2022-08-02
XI AN JIAOTONG UNIV
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[0003] At this stage, there are the following problems in the study of fluid friction loss in the static and rotational gap: 1) In the previous experimental system of friction loss, it is difficult to distinguish fluid friction loss from bearing friction loss. In the friction loss of the fluid in the static and rotational gap, the error of the experimental measurement results is too large, which reduces the prediction accuracy of the friction loss model; The friction loss of low-pressure fluid in the static clearance is difficult to realize for high-pressure, high-density supercritical fluid experiments
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[0039] The present invention is described in further detail below in conjunction with the accompanying drawings and embodiments, and its content is to explain rather than limit the present invention:
[0040] like figure 1 , is the experimental system for measuring the friction loss of high-pressure fluid in the rotating and static gap of the present invention, including a high-speed motor 1, a torque detection device 3, a main device of the test bench 5, a data acquisition system 6, a gap and a sealed air supply system and a vacuum system;
[0041]The main device 5 of the test bench includes a rotor 17 and a casing 18. The rotor 17 is arranged inside the casing 18. Both ends of the rotor 17 are supported by bearings 21. A graphite ring sealing device 20 is provided between the middle of the rotor 17 and the bearings 21 at both ends. A sealing air supply port is provided in the middle of the graphite ring sealing device 20; a rotating and static gap 19 is formed between the mi...
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The invention discloses an experimental system for measuring friction loss of high-pressure fluid in a rotor-static gap and a working method of the experimental system, and belongs to the technical field of turbomachinery design and analysis. Compared with a conventional friction loss measurement method, the influence of bearing friction loss and graphite ring sealing device friction loss in the experiment table main body device on measurement of the friction loss of the fluid in the rotating and static gap is eliminated, and the measurement precision of fluid friction is greatly improved. Meanwhile, when the friction loss of the bearing and the friction loss of the graphite ring sealing device are measured, the fluid pressure in the rotor-static gap is fully reduced to reduce the influence of the fluid friction loss, and the measurement precision is improved. By improving the shaft end sealing technology, the friction loss of the high-pressure and high-density supercritical fluid in the rotor-static gap is measured. According to the method, high-precision measurement of the friction loss of the high-pressure fluid in the rotor-static gap is realized, and the method can be used for checking a numerical simulation method and a friction loss prediction model.
Description
technical field [0001] The invention belongs to the technical field of impeller mechanical design and analysis, and in particular relates to an experimental system for measuring friction loss of high-pressure fluid in a rotating and static gap and a working method thereof. Background technique [0002] Turbomachinery is an important heat-power conversion device, and its efficiency has a significant impact on the comprehensive performance of the cycle. Therefore, the research on the internal loss of turbomachinery has always been one of the hotspots. For the turbomachinery with high pressure and high density supercritical fluid as the working fluid, the friction loss in the rotating and static gap has become one of the key issues affecting the operating efficiency. The results of public research show that the friction loss inside the high-speed turbomachinery has become the main source of loss. In the supercritical carbon dioxide principle prototype of Sandia National Laborat...
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Login to View More IPC IPC(8): G01N19/00G01N3/56G01N3/06
CPCG01N19/00G01N3/567G01N3/06G01N2203/0222G01N2203/023
Inventor 邓清华胡乐豪赵卓斌李军丰镇平
Owner XI AN JIAOTONG UNIV