CN200972447Y - Microflow field sensor for micro real-time investigating particle in flow - Google Patents

Abstract

The utility model relates to a micro flow field sensor using for the real time microscopic detection of particles in fluid, which belongs to a sensor used for the real time microscopic detection of contaminated and wear particles in oil liquid. The basal body (2) of the sensor is formed from two superimposed basal bodies with different thickness, opening camera lens observation hole (3). The thicker basal body has an oil inlet channel (1) opened in one end and an oil outlet channel (4) in the other end. Two high hardness glass slides (6) are positioned in a recessed cavity in the middle part of the thinner basal body through a glass slide-embedding slot (9) of the basal body. A micro fluid guide vane (10) is sandwiched between the two high hardness glass slides (6) to form a shunt channel (7) and a micro-flow field channel (8) which is communicated with both the oil inlet channel (1) and the oil outlet channel (4). A covering panel (5) is pasted onto the basal body to seal the high hardness glass slides. The sensor can conduct an integrated monitoring and fusion diagnosis of wear faults when the machine is in a running state, to realize a real-time on-line monitoring.

Description

The miniflow field sensor that is used for the micro-real-time detection of fluid particle

Technical field

The miniflow field sensor that is used for the micro-real-time control of fluid particle of the present utility model belongs in the mechanical engineering and pollutes and the micro-real-time detection of wear particle.

Background technology

In lubricating system and hydraulic system, wearing and tearing are inevitable, for guaranteeing the normal operation of lubricating system and hydraulic system, will in time know the situation of fluid, capture still nonevent accident potential, the safe operation of support equipment avoids paying the expensive cost of repairs, the SDR of the reducing the loss time, reduce maintenance cost.Present oil analysis mainly contains Atomic Emission Spectral Analysis, atomic absorption spectroscopy, analyzing iron spectrum, particle collector, magnetic plunger etc.The now main three kinds of modes in back down of analyzing.Analyzing iron spectrum is to realize in the laboratory by ferrograph, is exactly sampling regularly in lubricating system or hydraulic system, composes, reads spectrum etc. through the pre-service of oil sample, system in the laboratory, could analyze wear particle composition size, topographic profile, research abrasion mechanism.But this information must come analysis and judgement through experienced expert, like this detection time consuming time very long and error is big, subjective influence is many, belongs to offline inspection.Particle collector is to adopt the photoelectricity number scale to measure the size and the quantity of abrasive particle in the fixed volume fluid, determining apparatus pollution level.This method can not be distinguished wear particle and other pollutants, can not discern abrasive type, and instrument is relatively costly.This method mainly is easily to omit important failure message, detects but can be implemented in line.The magnetic plunger is exactly to be equipped with on the ferromagnetic material and barrier film in the electromagnet absorption fluid by the housing cavity of resorption, on electromagnet, post Hall element, when the magnetic flux that passes Hall element changes, induced voltage also responds change, when reaching predetermined voltage or time, the electromagnet outage discharges the ferromagnetism abrasive particle, and electromagnet is switched on once more and monitored next time, realizes the continuous coverage of ferromagnetic material in the fluid.It is the size and the pattern of analysing particulates, thereby judges abrasion condition, and its shortcoming is to analyze the nonferromagnetic material, length consuming time.

The utility model content

The purpose of this utility model provides the operating mode of monitoring lubricating system and hydraulic system wearing and tearing and pollution in a kind of oil circuit at the scene at any time, implements online and continuous monitoring sensors two kinds of patterns of off-line.

A kind of miniflow field sensor that is used for the micro-real-time detection of fluid particle, it is characterized in that: comprise matrix, the camera lens observation port, the oil-in passage, the oil-out passage, overlay, high hard slide, the microfluid flow deflector, miniflow field passage, split channel, described matrix is formed by stacking by one thick one two thin matrixes, its vertical central authorities have the camera lens observation port, the length direction of a wherein thicker matrix is along center line, one end has the oil-in passage, the other end has the oil-out passage, have a camera lens observation port in the vertical central authorities of matrix, there is a rectangular enclosure that falls in middle part in thin matrix inboard, and open a slide embedded groove, the hard slide of described height comprises visual field slide and end slide, and visual field slide and end slide all are loaded in the rectangular enclosure that matrix one side middle part falls in by the slide embedded groove in the matrix; The microfluid flow deflector of two symmetries is clipped between above-mentioned visual field slide and the end slide about described, the miniflow field passage in the middle of forming and two split channels of passage both sides, miniflow field symmetry.This miniflow field passage and this split channel all communicate with the oil-in passage and the oil-out passage at matrix two ends; Described overlay central authorities have one with the corresponding camera lens observation port of matrix, this overlay sticks between the high hard slide on the matrix the hard slide sealing of height.

Beneficial effect

1, in real time pollutant and particles such as each metalloid in the monitoring analysis fluid, nonmetal, polymkeric substance and colloid, minimum resolution reaches 1 μ m.

2, the dual-use function that has particle collector (pollution monitoring) and grain size analysis, and realize the information fusion monitoring and fault diagnosis;

3, can off-line or on-line monitoring analysis, be fit to base, laboratory, naval vessel or field operations occasion and use.

4, simple and reliable for structure, cost is low.

5, measuring accuracy height, data reappearance error＜2%.

Four, description of drawings

Fig. 1 looks synoptic diagram for the sensor construction master; Fig. 2 is the schematic top plan view of a thicker matrix in the sensor construction; Fig. 3 is a microfluid flow deflector synoptic diagram.

Among the above-mentioned figure: 1, oil-in passage 2, matrix 3, camera lens observation port 4, oil-out passage 5, overlay 6, high hard slide 7, split channel 8, miniflow field passage 9, slide embedded groove 10, microfluid flow deflector

Embodiment

Example of the present utility model is described further in conjunction with the accompanying drawings.

As Fig. 1: this miniflow field sensor, be by matrix, high hard slide, the microfluid flow deflector is formed, matrix is made by two parts up and down with brass and is combined, the centre all has the camera lens observation port, the latter half matrix is complicated a little, it has the slide embedded groove, the oil-in passage, the oil-out passage, high hard slide is divided into visual field slide and end slide, the microfluid flow deflector is the PDMS material, make given shape according to needed passage, with the visual field slide, end slide is compressed on together under middle temperature, and body flow deflector thickness is 50 μ m, i.e. the clearance distance of visual field slide and end slide, be exactly the microchannel degree of depth, satisfy system's needs.The high hard slide and the microfluid flow deflector that suppress are inserted matrix, use the covering version fixing again, and inner chamber seals with the modified acroleic acid ester gum.Like this, through the logical hydraulic fluid port miniflow field of flowing through, by the camera lens viewport, optics and digital double amplify at fluid, for further Flame Image Process obtains desirable view.

Concrete observation process is that this miniflow field sensor is inserted in the oil circuit, fluid is from oil-in passage flow sensor, fluid is divided into one road miniflow field passage and three tunnel circulations of two-way split channel, flow out from the oil-out passage again, the diverter branch of both sides is symmetrically distributed, the mobile solid-liquid two-phase flow characteristic that is of fluid and abrasive particle in the middle miniflow field passage, so abrasive particle concentrates on the intermediate flow of miniflow field passage, we utilize the ultra-high brightness LED light source as transmitted light source like this, amplify through the optics of long-focus microlens visual field in the miniflow field, amplify through the numeral of high speed digital image acquisition camera again, enter that computer carries out the oil contamination analysis and abrasive particle is discerned automatically, thereby carry out state of runtime machine comprehensively monitoring and wear-out failure fusion diagnosis, realize the purpose of real time on-line monitoring.

Claims (1)

1. miniflow field sensor that is used for the micro-real-time detection of fluid particle, it is characterized in that: comprise matrix (2), camera lens observation port (3), oil-in passage (1), oil-out passage (4), overlay (5), high hard slide (6), microfluid flow deflector (10), miniflow field passage 8, split channel (7), described matrix (2) is formed by stacking by one thick one two thin matrixes, its vertical central authorities have camera lens observation port (3), the length direction of a wherein thicker matrix is along center line, one end has oil-in passage (1), the other end has oil-out passage (4), vertical central authorities have a camera lens observation port (3) at matrix (2), there is a rectangular enclosure that falls in middle part in thin matrix inboard, and open a slide embedded groove (9), the hard slide of described height comprises visual field slide and end slide, and visual field slide and end slide all are loaded in the rectangular enclosure that matrix (2) one side middle parts fall in by the slide embedded groove (9) in the matrix (2); The microfluid flow deflector (10) of two symmetries is clipped between above-mentioned visual field slide and the end slide about described, miniflow field passage (8) in the middle of forming and two split channels (7) of miniflow field passage (8) both sides symmetry, this miniflow field passage (8) and this split channel (7) all communicate with the oil-in passage (1) and the oil-out passage (4) at matrix (2) two ends; Described overlay (5) central authorities have one and the corresponding camera lens observation port of matrix (2) (3), and the height that this overlay (5) sticks on the matrix (2) between the slide (6) seals the hard slide of height (6) firmly.

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