CN85109568A - The purification mechanism and the structure of multimachine reason high accuracy oil conditioner - Google Patents

Abstract

The present invention adopts magnetic absorption, coarse filtration, centrifugation, electrostatic depuration, the organic assembling form of the multiple purification mechanism of degree of depth type press filtration, various solid pollutants in the high accuracy purification hydraulic oil and colloid, moisture, air etc.The ejection of interior dress hydraulic oil ozzle pressure oil liquid is the centrifugal rotor body of power, radiator valve and HV generator and automatic safe protective circuit.By the reasonable Arrangement and the processing of dust-collecting material, obtain to purify gradient electric field.Purification speed is fast, precision is high, energy consumption is low, safe and reliable.The absolute oil precision can reach (NAS-1638) below six grades.

Description

The purification mechanism and the structure of multimachine reason high accuracy oil conditioner

Along with developing rapidly of hydraulic technique, it is integrated that hydraulic system and Hydraulic Elements tend to high-performance, high accuracy day by day, high pressure does not have pipe, pollution control to hydraulic oil liquid proposes more and more higher requirement, not only to the strict control of solid more than the 10 μ m, and to sneaking into all strict control of microparticle, colloidal oxide, moisture content, air below 3 μ in the hydraulic oil liquid.In hydraulic system, can not satisfy the systematic function requirement like this by the dress plain filter.Best various purification mechanisms being combined, bring into play the speciality of various purification mechanisms, reach the purpose that comprehensive high accuracy purifies fluid, is the new breakthrough and the new technology of hydraulic system oil liquid superhigh precision purification aspect.

Structure of the present invention such as front view (1), shown in the vertical view figure (2), oil conditioner cleaning system block diagram is shown in figure (3).The fluid (being called dirty oil) that needs to purify is sucked by the antipollution constant displacement pump; arrange magnetic thick oil filter at inlet port; as the preposition filtration of oil pump; the filtering coarse granule; the protection oil pump passes through the automatic constant-temperature adjuster then, suitably improves the temperature of oil; reduce oil viscosity, improve under the low temperature and the purification precision of high-viscosity oil.The automatic constant-temperature regulating system is by electric heater, the responsive to temperature contact, and automatic control circuit and switch are formed.Electric heater capacity is calculated by equation of heat balance according to flow:

H=C ρ Q △ T(kilocalorie/time) ... (1)

The specific heat of C-oil is got 0.5(kilocalorie/kilogram ℃)

The density of ρ-oil is got 900(Kg/m ³)

The Q-oil pump flow, 600 liters/hour

N＝H/860·η……（2）

η-heat transference efficiency gets 0.8

The present invention adopts 3(KW) the spiroid canal electric heater, temperature is the highest to be no more than 40 ℃ (± 5%).Fluid after heating up is at △ p≤8Kg/cm ²Pressure down at a high speed from the ejection of streamlined nozzle, can obtain by the Bai Nuli equation according to flow system flow and pressure, this oil conditioner adopts centrifugal rotational speed 5000rpm, flow 10l/min, according to the Bai Nuli equation:

Z ₁+ (P ₁)/(r) + (V ₁ ²)/(2g) =Z ₂+ (P ₂)/(r) + (V ₂ ²)/(2g) +hω…（3）

Because Z ₁=Z ₂, chewing equation for the streamlined pipe can be written as:

(△P)/(r) + (V ₁ ²)/(2g) = (V ₂ ²)/(2g) (1+ξ)……（4）

Get nozzle velocity coefficient 0.98,

△p＝8Kg/cm ²

r＝0.9Kg/l

V ₂＝4216Cm/s

n≈5000（r·p·m）

In 5000 rev/mins centrifugal flow field, because the difference in specific gravity of polluter and fluid exists, make contamination particle (moisture content, colloid etc.) be subjected to the effect of centrifugal force and electric field force, move radially rapidly, perisporium at cylindrical shell is adsorbed by the Electrostatic Absorption material, reach the purpose of purification, if at the contamination particle at r=0.2 rice, centrifugal flow field, suffered centrifugal force is compared with gravity:

(F _C)/(F _G)=(mr ω ²)/(mg)=(r ω ²)/(g)=5589 (doubly) ... (5)

Here:

ω-rotational angular velocity is by n=5000rpm conversion gained;

F _cF _G-be respectively centrifugal force and gravity.

The checking computations proof is in 5000rpm centrifugal force flow field, and contained polluter will separate rapidly with more than 5000 times active force of gravity in the oil.This is the high-speed high accuracy mechanism of centrifugal clarification place.

Because between garden cylindrical shell and the rotor block is a pair of high-pressure electrostatic electrode, contamination particle is subjected to the effect of electric field force in the effect in centrifugal force flow field:

F＝F _c+F _e-F _u……（6）

Wherein:

F _c＝mrω ²

F _e＝f ₁+f ₂+f ₃

f ₁, f ₂, f ₃-be respectively electric field Coulomb force, image force and electric field gradient force.

F _u=6 π μ a ν (Stokes formula)

In order to say something qualitatively, consider action of centrifugal force earlier separately, estimate that particle moves radially speed:

Suppose at this moment to have reached dynamic balance, equation (6) is written as:

F _c＝F _u

mω ²r＝6πμaν

Wherein:

M=ρ 4/3 π a ³(suppose that particle is that spherical radius is a)

μ=ρ _Oilν (fluid dynamic viscosity)

$\mathrm{v=}\frac{{\mathrm{m\omega }}^{2}r}{\mathrm{6\pi \mu a}}=\frac{\frac{4}{3}{\mathrm{<figure-callout\; id="3"\; label="\rho \pi a"\; filenames="85109568\_DRIMG1.png"\; state="\{\{state\}\}">\rho \pi a</figure-callout>}}^3{\omega }^{2}r}{{\mathrm{6\pi \rho }}_{}{v}_a}=\frac{2}{g}·\frac{\rho }{{\rho }_{}}·\frac{a^2}{v}{\mathrm{<figure-callout\; id="2"\; label="\omega "\; filenames="85109568\_DRIMG1.png,85109568\_DRIMG2.png"\; state="\{\{state\}\}">\omega </figure-callout>}}^2\mathrm{·r}$

……（7）

Formula (7) shows that qualitatively the contamination particle centrifuge speeds depends on the density ratio, the radial position of rotating speed and particle, granular size and fluid kinematic viscosity, (determine the smallest particles radius a) if pre-determine the absolute oil precision, just can estimate separating rate, by fluid holdup time in centrifugal zone, design the physical dimension of centrifugal cylindrical shell then.

Owing to be again the high-voltage electrostatic field simultaneously in the centrifugation zone, laying on the dust-collecting material of good adsorption ability and dirt carrying capacity on the perisporium of the garden of cylindrical shell.So both increase the separation force of dirt, improved contaminant holding capacity again.

Fluid can be calculated by Euler's formula from the active force that surges of nozzle ejection:

F＝f′+f″＝ (r)/(g) Q（V ₂-V ₁）+△p·s……（8）

Here: s is the nozzle discharge area, can be obtained by continuity equation:

S= (Q)/(V ₂) ……（9）

Fluid separates and Electrostatic Absorption through high speed centrifugation, and the fluid precision has reached high level, can remove the following colloidal substance of 0.1 μ.But because viscous effect has few part polluter and brings out with fluid in fluid flows.The present invention is provided with static press filtration zone again at oil-out.Common degree of depth shape pressure filter, filtering accuracy depends on the thickness of filling fiber, compactness extent.For the particle below the 3 μ m, even littler colloid, filtration is had any problem.Be subjected to other filtering feature parameter simultaneously, as pressure fall, the influence of through-current capacity etc.In order to remedy the shortcoming of degree of depth shape filter, adopt filling fibers material in more open ground between the high-pressure electrostatic electrode at oil-out, as nylon, glass fibre etc.Make fibers material electrostatic induction in highfield.Microparticles such as colloid are under effect of electric field, because of charged or electrostatic inductions such as frictional impact, illumination, the swashes of wave, these charged particles are under the electric field force effect, be adsorbed on the fibrous material, meanwhile particle is subjected to the buffer action that stops of fiber filling bed, under such double action, residual microparticle, colloid etc. are effectively removed in the fluid.Owing to increased the high-pressure electrostatic effect between the press filtration filter core, the lube purification precision is improved greatly, make the reduction of filter pressure simultaneously, through-current capability improves.

The purification mechanism in following surface analysis electrostatic pressure filter zone because degree of depth shape press filtration cleaning principle is more obvious, highlights Electrostatic Absorption mechanism here.

According to the electrodynamics principle, the potential function in the static press filtration zone shown in the figure (1) satisfies Poisson's equation:

……（10）

Here:

ε ₁The relative dielectric constant of-fluid,

ρ-electron charge density,

P＝3ε ₃/（ε ₃+2），

ε ₃The relative dielectric constant of-particle.

After approximate, the electric-field intensity in fluid and the control of dust material can approximate representation be:

E ₁= (ε ₂)/((ε ₁-ε ₂)d ₂+ε ₂L) ……（11）

E ₂= (ε ₁)/((ε ₁-ε ₂)d ₂+ε ₂L) ……（12）

Because filter material is a loose anisotropic fiber filling material, so the DIELECTRIC CONSTANTS of material ₂Be a statistical value, at this moment the relation of polarization intensity P and field intensity E can be expressed as:

D _x＝ε _o（ε _xxE _x+ε _xyE _y+ε _xxE _z）

D _y＝ε _o（ε _yxE _x+ε _yyE _y+ε _yzE _x）

D _z＝ε _o（ε _zxE _x+ε _zyE _y+ε _zzE _z）

At this moment the DIELECTRIC CONSTANTS of filter material can be used tensor representation:

Because ε _XyzChange in various directions and space each point, so electric field strength E ₁, E ₂Be the heterogeneous of distortion, gradE ≠ 0 at this moment, under the effect of this inhomogeneous field, charged particle is subjected to the effect of following several main power:

Storehouse, storehouse power: f ₁=K ₁12 π ε ₁α ²E ²

Image force: f ₂=K ₂(a ⁴)/(4d ²) ((ε ₁-ε ₂))/((ε ₁+ ε ₂)) ε ₁E ²

Gradient force: f ₃=2 π a ³(ε ₃-1)/(ε ₃+ 2) ε ₁GradE ²

Viscous force: f ₄=6 π μ a ν (work as R _e＜0.5 o'clock)

The stressed equation of motion of particle is:

m (dv)/(dt) =K ₁12πε ₁E ²a ²+K ²(a ₄)/(4d ²) ((ε ₁-ε ₂))/((ε ₁+ε ₂)) ε ₁E ²

+2πα ³(ε ₃-1)/(ε ₃+2) ε ₁gradE ²-6πμav……（14）

After polluter was adsorbed onto on the fibrous filter, equilibrium equation was:

f ¹=f ₁+f ₂+f ₃

=K ₁12πε ₁a ²E ²+K ₂(a ⁴(ε ₁-ε ₂))/(4d ²(ε ₁+ε ₂)) ε ₁E ²

+2πa ³(ε ₃-1)/(ε ₃+2) ε ₁gradE ²……（15）

In formula (14), under the effect of (15) active force, particle is in chemical fibre filling bed gap or be blocked isolation, perhaps is adsorbed, and the further high accuracy of fluid is purified.

In figure (1), figure (2),

1. motor-oil pump; 2. nozzle; 3. centrifugal garden cylindrical shell; 4. rotor block;

5. press filtration district garden cylindrical shell; 6. degree of depth type filter core; 7. oil-out; 8. rotating shaft;

9. stop valve; 10. thermostat, heater; (11) the control of dust body of circumferential arrangement;

(12) oil inlet pipe and pipe joint.

Claims (4)

1, multimachine reason reasonable combination is carried out in coarse filtration, magnetic absorption, centrifugation, static press filtration, carry out high accuracy, high efficiency purification insulating properties fluid, and can realize effectively that gas is the Reasonable Parameters and the structure of the multimachine reason high accuracy oil conditioner of feature in water-oil separating, adsorption removal colloidal oxide matter and the fluid.

2, utilize the pressure oil liquid ejection to rotate for powered centrifugal rotor height speed, thereby set up high current body centrifugal force field, reach the purpose that high speed water-oil separating and polluter separate, utilize the power of surging to cancel dragging of other power and solve the surge power rotor block structure of movable sealing leakage problem for feature.

3, have the good adsorption polluter, the dirt saturation is big, and the material dielectric constant height is the press filtration material for core and the structural configuration of feature.

4, with reasonable rising lube purification method of temperature, suitably reduce oil viscosity, reduce the influence of viscosity to the absolute oil precision, mechanism and the structure that automatic thermostatic controller is the multimachine reason high accuracy oil conditioner of feature is equipped with in the oil conditioner inside of high-viscosity oil purification precision and speed under the raising low temperature.

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