On-line monitoring device for oil pollution of hydraulic system and monitoring method

Abstract

The invention relates to an on-line monitoring device for oil pollution of a hydraulic system and a monitoring method. By means of on-line monitoring for parameters such as temperature, pressure, oilpollution particles and the like of the hydraulic system, the degree of the oil pollution of the hydraulic system is evaluated by a temperature, pressure and oil pollution particle change prediction curve created by a grey prediction model, inspection and maintenance suggestions are submitted according to correlation of temperature, pressure, abrasive particle content and fault and fed back to a technician, so that the purposes of fault early warning and on-condition maintenance are achieved, potential fault of the hydraulic system can be found in time, follow-up serious accidents are prevented through maintenance, effective operation of equipment is guaranteed, and service life of the equipment is prolonged.

Description

technical field [0001] The invention belongs to hydraulic system fault detection and estimation technology, and relates to an online monitoring method for oil pollution of a hydraulic system. Background technique [0002] During the operation of the hydraulic system, due to the inevitable wear between the components, the wear particles in the hydraulic system are generated and mixed into the oil. The hydraulic oil is polluted and the oil filter is blocked, and the oil filter after being blocked As a result, the viscosity of hydraulic oil increases, and the heat generated by friction in the system increases sharply, resulting in an increase in oil temperature and system temperature; oil filter clogging will cause insufficient oil supply to the system, resulting in a drop in system pressure and affecting system operating efficiency. Various solid particle pollutants in the oil are not only the cause of mechanical component wear failure, but also the product of component wear, ...

AI Technical Summary

Problems solved by technology

However, the monitoring object of this method is single, and the influence of the operating temperature and pressure of the hydraulic system on the flow is not considered, which makes the monitoring results inaccurate.

[0005] Patent Publication No. CN 102147404A provides a method and device for monitoring the pollution degree of lubricating oil. It adopts the form of a composite piston cylinder to monitor the displacement of the piston caused by the clogging of 5 μm and 15 μm particles to estimate the pollution degree of the oil. The device overcomes the existing The existing oil pollution monitoring device has the disadvantages of complex equipment, high cost and cumbersome measurement methods.

However, when the hydraulic system is running, the temperature and pressure vary widely, which also has a certain impact on the piston displacement of flow blockage, which makes the accuracy of the results obtained by this method not high, and it is impossible to predict the fault.

Images