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

A technology for hydraulic system and oil pollution, which is applied in the field of online monitoring of oil pollution of hydraulic system, can solve the problems of low accuracy, large variation range, complicated equipment, etc., achieve stable working state, shorten the life of equipment, improve The effect of work efficiency

Inactive Publication Date: 2018-01-09
NORTHWESTERN POLYTECHNICAL UNIV
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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

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

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[0036] When the hydraulic system works normally, the system parameters are all working near the design and set values. If these parameters deviate from the predetermined values ​​during work, the system will fail or may fail. For example, the working temperature of a reasonably designed hydraulic system changes. The range is limited, and the abnormal rise of system temperature often means that there is a fault in the system, and the system pressure comprehensively reflects the working status of the system and its components. According to the characteristics of the hydraulic system and the parameters to be measured, a new online monitoring method and device for oil pollution in the hydraulic system are designed. For the pressure and temperature of the main working parameters, it is only necessary to set sensor measuring points at the inlet and outlet of the pump (1, 2) and the inlet and outlet of the actuator (3, 4), and measure the pressure and temperature of four points 1, 2, ...

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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, ...

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Application Information

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IPC IPC(8): G01N15/06G01N33/28
Inventor 王煜阳付江刘永寿
Owner NORTHWESTERN POLYTECHNICAL UNIV
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