System for testing speeds of cryogenic radial inflow turbines and centrifugal compressors
A centrifugal compressor and testing system technology, applied in the direction of linear/angular velocity measurement, velocity/acceleration/impact measurement, measuring device, etc., can solve the problems of increased installation difficulty and decreased measurement accuracy of rotational speed sensor, and achieve simple installation and improved System test efficiency and accuracy, the effect of a wide range of applications
Inactive Publication Date: 2014-07-02
XI AN JIAOTONG UNIV
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Problems solved by technology
At the same time, the miniaturization of new radial turbines and centrifugal compressors is also a design trend. For small radial turbines and centrifugal compressors, the difficulty of traditional magnetoelectric and ordinary non-contact installation will be significantly increased. Accuracy will drop significantly
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[0023] Give specific description below in conjunction with accompanying drawing:
[0024] see Figure 1 to Figure 4 As shown, the present invention is a rotational speed test system of a low-temperature working fluid radial turbine and centrifugal compressor, including a high-speed high-frequency oscillation proximity switch 5, a voltage regulation and stabilization circuit, a data acquisition card and an industrial control computer.
[0025] see figure 2 As shown, when installing the high-speed and high-frequency oscillation proximity switch 5, a hole is drilled in the casing 1 of the radial turbine or centrifugal compressor facing the impeller 3, and the threaded sleeve 4 is welded in the hole, and then the high-speed, high-frequency oscillation proximity switch is installed. 5 is installed into it, flush with the inner wall of the casing 1 of the centripetal turbine or centrifugal compressor.
[0026] The sensing part is completed by the high-speed and high-frequency osc...
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The invention provides a system for testing speeds of cryogenic radial inflow turbines and centrifugal compressors. The system comprises a first shell, a voltage regulator circuit, a data acquisition card and an industrial control computer, wherein an impeller is arranged in the first shell; an installation hole is arranged in the position, dead against the impeller, on the first shell; a threaded sleeve is installed in the installation hole; a first proximity switch is installed in the threaded sleeve and is flush with the inner wall of the first shell; the first proximity switch is connected with the voltage regulator circuit and the data acquisition card; and the data acquisition card is connected with the industrial control computer. The system has the following advantages that: the system is simple to install, has a wide range of application and is applicable to various types of big and small cryogenic radial inflow turbines and centrifugal compressors; and the problems that the traditional magnetoelectric sensors need to be extremely close to the tested rotatable parts, the sensors are about to impact and rub with rotors if vibration of the rotatable parts is too big during operation, and the installation difficulty is higher are solved by using the proximity switch.
Description
technical field [0001] The invention relates to the field of rotational speed measurement, in particular to a non-contact rotational speed test system of a low-temperature working fluid centripetal turbine and a centrifugal compressor. Background technique [0002] The centripetal turbine has the advantages of compact structure, simple manufacturing process, low cost, and high efficiency can still be obtained under the design condition of small flow. With the development of engineering technology, it is not only widely used in small and medium power gas turbine devices and exhaust gas turbochargers of diesel engines, but also widely used in expanders of refrigeration devices and natural gas liquefaction devices, main engines of some small and medium ships, Distributed power generation system, military vehicle auxiliary power unit, vehicle hybrid power unit, fuel cell-gas turbine combined cycle device. [0003] Centrifugal compressor is the most widely used form of compresso...
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IPC IPC(8): G01P1/02G01P3/00
Inventor 谢永慧赵鹏飞李亚鸽刘乐张荻
Owner XI AN JIAOTONG UNIV