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Fault diagnosis method for annular air valve of reciprocating compressor

A fault diagnosis and compressor technology, applied in the field of compressors to achieve high accuracy

Active Publication Date: 2018-10-30
HEFEI GENERAL MACHINERY RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no complete fault diagnosis method for the vibration signal of the air valve at present.

Method used

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  • Fault diagnosis method for annular air valve of reciprocating compressor
  • Fault diagnosis method for annular air valve of reciprocating compressor
  • Fault diagnosis method for annular air valve of reciprocating compressor

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Experimental program
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Embodiment Construction

[0032] Below in conjunction with embodiment technical solution of the present invention is made more specific description:

[0033] The reciprocating compressor selected in this embodiment is a DW-8 / 10 two-stage air compressor manufactured by Sichuan Jinxing Compressor Co., Ltd., with a volumetric flow rate of 8m 3 , air supply volume 480Nm 3 / h, exhaust pressure 1.0Mpa. The air valves used in this compressor are all three-ring annular air valves. The air valve studied in the experiment is a two-stage exhaust air valve, and its vibration signal is collected by PCB EXM 608A11 sensor and NI 9234 board.

[0034] In order to explore the difference of the vibration signal of the air valve under different faults and to simulate the classification of different fault signals, the present invention divides the fault types into: a) valve plate fracture; b) air valve spring failure. We have damaged the valve plate of the exhaust valve to different degrees, and the damage method corres...

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Abstract

The invention mainly relates to a fault diagnosis method for an annular air valve of a reciprocating compressor. The core of the fault diagnosis method is that on the basis of a mean value decomposition method of linear interpolation, fault diagnosis analysis is conducted on vibration signals of the annular air valve of the reciprocating compressor. The air valve vibration signals under the normalstate and different fault states are decomposed by adopting the fault diagnosis method, and all sets of PF components of the signals are obtained; and all characteristic parameters of all the PF components are extracted, all characteristic parameter values under the normal state and different fault states are compared, the corresponding characteristic parameters reflecting different faults are obtained, and thus fault diagnosis for the reciprocating compressor is achieved.

Description

technical field [0001] The invention belongs to the technical field of compressors, and in particular relates to a fault diagnosis method for an annular air valve of a reciprocating compressor. Background technique [0002] The reciprocating compressor is one of the most commonly used machines in the chemical production process of the oil and gas industry. With the continuous improvement of high performance and high safety requirements, ensuring its operation safety has become an important research topic. Vibration-based measurement and analysis techniques have been proven to be very effective in machinery health monitoring and fault diagnosis, because vibration signals can reflect a large amount of operating status information when equipment is in service, and certain conditions can be successfully detected using some analysis methods Faults in rotating machinery such as gearboxes and bearings. However, due to factors such as gaps, nonlinear stiffness of bearings, unbalanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00
CPCF04B51/00
Inventor 舒悦张谦谢传东于洋鲍军肖军何明王树胜刘岑
Owner HEFEI GENERAL MACHINERY RES INST
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