Monitoring system and monitoring method of reciprocating compressor

Abstract

The invention provides a monitoring system and a monitoring method of a reciprocating compressor. The monitoring system of the reciprocating compressor comprises a sensor and an analysis controller, and the sensor captures an action signal when the reciprocating compressor runs; the analysis controller receives the action signal, converts the action signal into an angle signal, and matches the action signal with the angle signal to form state information; and the analysis controller compares the state information with template information through an operation program and judges whether the state information conforms to the template information or not so as to obtain the machine condition of the reciprocating compressor. Therefore, detection can be carried out without process information, and the machine condition of the reciprocating compressor can be accurately mastered.

Description

technical field [0001] The invention relates to a monitoring system and method, in particular to a monitoring system and method for a reciprocating compressor. Background technique [0002] A reciprocating compressor is a compressor driven by a piston driven by a crankshaft. When the crankshaft reciprocates, the intake valve will be opened first, and the exhaust valve will be closed. The intake air enters the compression cylinder through the intake valve, and then the intake valve Closed, the piston movement reduces the volume of the compression cylinder, compresses the gas, and then the exhaust valve opens to discharge the high-pressure gas. [0003] During the operation of the reciprocating compressor, each moving part will emit a rhythmic and normal sound consistent with the speed. Experienced diagnostic personnel can judge whether the compressor is running normally from the different sounds. When the sound has harsh noises, impacts and irregular rhythms, they can immedi...

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Problems solved by technology

[0004] However, the accuracy of manual judgment through sound is not high, and judgment errors are prone to occur; therefore, in order to improve the manual judgment method, a smart system judgment method has been developed, for example: China Patent No. CN102797671 discloses a reciprocating compressor The fault detection method and device, which need to obtain the vibration signal parameter characteristics of the reciprocating compressor and the thermal parameter characteristics of the cylinder intake temperature, exhaust temperature, intake pressure and exhaust pressure, and generate state characteristic indicators according to the vibration signal parameters According to the vibration signal parameter characteristics and thermal parameter characteristics, the working condition characteristic index set is generated, and the fault detection result is generated according to the state characteristic index set and the industrial and mining characteristic index set.

[0005] However, in the aforementioned patents, the vibration signal parameters must be combined with a large amount of data such as process data (cylinder intake temperature, exhaust temperature, thermal parameter characteristics including intake pressure and exhaust pressure) to be able to determine the machine status of the reciprocating compressor. , so if one of the parameter characteristics is abnormal, accurate fault detection results cannot be obtained

[0006] Moreover, as disclosed in the specification of the aforementioned patent, it is necessary to install the acceleration sensor on the crankshaft bearing seat of the reciprocating compressor, the outer surface of the cylinder liner and the valve seat of the air valve to measure the vibration signal parameters, and use the temperature sensor and the pressure sensor, Measure the cylinder intake temperature, exhaust temperature, intake pressure and exhaust pressure of the reciprocating compressor separately to obtain process data (cylinder intake temperature, exhaust temperature, intake pressure and exhaust pressure, including thermal parameters feature), that is to say, the above-mentioned patent needs to install at least five sensors to obtain the machine condition information for judging the reciprocating compressor, so when the fault detection of the reciprocating compressor is carried out through the above-mentioned patent, the installation cost is too high, and It takes a lot of time to process the data generated by each sensor, and it takes a long time to obtain the fault detection results

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