CN1327939A - Bionic part with adhesion-reduced, desorptive and rough surface - Google Patents

Abstract

A bionic part with viscosity-reducing, desorptive and rough surface is disclosed, whose working medium or object is viscose material. On the basis of bionic principle, the structure unit bodies with a certain geometric shape are regularly distributed on the surface of said part composed of rough surface and base body. Said unit body has a spherical head, whose geometric shape, quantity and distribution rule and determined by working environment.

Description

Bionic part with adhesion-reduced, desorptive and rough surface

It is the facility parts of target and working medium that bionic part with adhesion-reduced, desorptive and rough surface belongs to the viscous material.Relate to subjects such as machinery, material, chemistry, biology.

Desirable reducing adhesion mechanism should be simple in structure, wear-and corrosion-resistant, handling ease, with low cost, reliable operation, highly versatile, do not influencing under the normal operation situation preferably and apparatus for work is finished desorption synchronously automatically, need not to increase in addition to handle and power, energy consumption is little, efficient is high, the desorption effect is obvious.Though on engineering, adopt rapping at present, strike off, inflation, topping up, post methods such as High molecular material, electric osmose and can obtain certain effect, still fail to satisfy fully above-mentioned requirements.Existing reducing adhesion technology is that specific features uses time side someway to demonstrate the effect of its reducing adhesion under given conditions, and energy consumption is big, and functional reliability is low, and the structure more complicated lacks commonality.

The objective of the invention is to solve the adhesional wetting materiel that soil etc. has certain viscosity brings severe bad influence for corresponding mechanical action with the adhesion of facility in processes such as processing, conveying, accumulating, the harm problem of attaching most importance to and solving soil adhesion provides a kind of bionic part with adhesion-reduced, desorptive and rough surface.

The object of the present invention is achieved like this, accompanying drawings is as follows: bionic part with adhesion-reduced, desorptive and rough surface provided by the invention, by bionics principle at distribute regularly the have certain geometrical shape structural unite body of (as spherical) of parts surface, make adhesional wetting materiel (as: soil, coal dust, grain etc. have the material of certain viscosity) the leading edge change of direction of motion and help reducing tangential adhesive force, produce normal component, form little vibration, and make adhesion interface moisture film be discontinuously arranged, thereby play the effect of reducing adhesion.Concrete solution is:

Bionic part with adhesion-reduced, desorptive and rough surface is made up of non-smooth surface and matrix, and non-smooth surface is made up of a plurality of cell cubes that are randomly dispersed on the smooth surface, the geometric configuration of cell cube spherical crown, quantity and be distributed as:

A) height of cell cube spherical crown

All the other

When (a, b) and (x, y) were overlapping, following formula can be simplified to: Z=R-Rcos θ

In the formula:

Z-cell cube spherical crown height, value can be at 1mm～4mm;

A, at the bottom of b-cell cube spherical crown circle at x, the coordinate on the y plane;

R-cell cube spherical crown radius, R=d/2sin θ;

θ-cell cube spherical crown centre of sphere angle, value can: 20 °～40 °;

The nominal intended diameter of circle at the bottom of d-cell cube spherical crown, value can be at 1mm～40mm.

B) cell cube spherical crown quantity

In the formula:

K-proportionality coefficient;

d ₀-reference diameter, value can: 3.5～4.0;

L _d-equivalent length;

L _x, L _yThe length of-physical unit or product and width;

N _a-cell cube spherical crown quantity;

k ₁, k ₂-be constant, k ₁=0.213～0.268, k ₂=0.129～0.181.

C) the cell cube spherical crown distributes

Cell cube spherical crown distributing position is obeyed rule or rectangular distribution, if distribute with parallelogram, then each cell cube spherical crown must satisfy a, and b is with L _x, L _yBe condition in the oblong on limit: $\sqrt{{(a_i+a_j)}^2+{(b_i+b_j)}^2}>d---\left(3\right)$

In the formula: i, j-be any cell cube spherical crown sequence number; a _i, b _i-be a certain cell cube at x, the position on the y; a _j,

b _i-be another cell cube at x, the position on the y.

The present invention has the following advantages: bionic part with adhesion-reduced, desorptive and rough surface have simple in structure, save the energy, with the apparatus for work synchronization action, need not to increase in addition manipulation and power, reducing adhesion efficient advantages of higher.For example, the bionic, non-smooth reducing adhesion tractor-ploughing mouldboard that utilizes the present invention to prepare, compare with traditional tractor-ploughing mouldboard, the bionic, non-smooth visbreaking falls the resistance mouldboard and turns over upturned soil well, garrulous soil rate is apparently higher than common smooth mouldboard, take off native rate and reach more than 95%, trac. ploughing resistance drop is low by 8%～15%, and the trac. fuel oil consumption can reduce by 5%～12%.The bionical Unsticking food spoon of preparation, meal spoon surface, the back rice grain desorption rate of filling a bowl with rice is up to 98%.

Further specify particular content of the present invention below in conjunction with the accompanying drawing illustrated embodiment:

The structural representation of the smooth mouldboard of Fig. 1 right and wrong;

Fig. 2 is a non-smooth surface meal spoon structural representation.

The present invention can be used for the production of Prepared for Touching-soil Components of Terrain Machinery, such as the power traction mouldboard, and plough, the parts productions such as spade also can For the daily production of people, live meal spoon commonly used, trowel etc.

Example 1 bionic, non-smooth mouldboard bionic, non-smooth mouldboard be the common plough wall surface by machine add, method such as forging and pressing, casting, welding goes out non-smooth geometry cell cube in surface preparation.By requirement of the present invention, can design the bionic, non-smooth visbreaking and fall the resistance mouldboard.According to (1) formula, suppose that the garden diameter is d=30mm at the bottom of the cell cube spherical crown, θ=20 ° are got at centre of sphere angle.

(a) cell cube spherical crown height: $Z=\sqrt{R^2-{(x-a)}^2-{(y-a)}^2}-R\cos \mathrm{\θ}$

R＝d/2·sinθ＝30/2·sin30°＝48.5436mm

Make x=a, y=b, then Z=48.5636-46.1677=2.4mm

(b) cell cube spherical crown quantity: can try to achieve according to (2) formula by actual requirement

d ₀Get 3.5, k=d/d ₀=30/3.5=85.7

Common mouldboard: Lx=500mm, Ly=350mm

Then $L_a=\sqrt{500\×350}/8.57=45.19$ N _a=(k ₁+K ₂L _d) ²

Get: k ₁=0.213, k ₂=0.129

N then _a=(0.213+0.129 * 45.19) ²=37 (individual)

(c) the cell cube spherical crown distributes: by requirement of the present invention, if parallelogram distributes, then any two non-smooth geometric units body spherical crown spacings should satisfy condition: $\sqrt{{(a_i-b_j)}^2+{(b_i-b_j)}^2}>d$ , distance should be greater than circular diameter at the bottom of the non-smooth units body spherical crown between also promptly wantonly two non-smooth geometric units body spherical crown center-points, otherwise two the non-smooth units body of some spherical crowns are with overlapping.According to the following formula design, can draw non-smooth units body spherical crown and distribute, consult Fig. 1.

Example 2, the bionic, non-smooth mouldboard

End circular diameter d=30mm is got in the requirement according to the present invention, and θ=40 ° are got at centre of sphere angle,

(a) cell cube spherical crown height: can calculate cell cube spherical crown height Z=2.6mm by example 2 methods of calculating

(b) cell cube spherical crown quantity: according to (2) formula, d ₀Get 4.0, k ₁=0.268, k ₂=0.181

Can calculate cell cube spherical crown quantity N by example 2 methods of calculating _a=92

(c) the cell cube spherical crown distributes: by requirement of the present invention, and rectangular distribution, any two non-smooth geometric units body spacings should satisfy condition: $\sqrt{{(a_i-b_j)}^2+{(b_i-b_j)}^2}>d$ , distance should be greater than its diameter between also promptly wantonly two non-smooth geometric units body spherical crown center-points.

Example 3, bionical Unsticking food spoon

Bionical Unsticking food spoon size L _x=90mm, L _y=70mm, because the viscous material-rice grain that is contacted is less, therefore, and the desirable 2mm of d value, cell cube spherical crown height Z gets 1mm, d ₀Get 3.5, k ₁Get 0.129,, can calculate cell cube quantity N according to (1), (2) formula and example 1 method of calculating _a=330.The non-smooth units body in bionical Unsticking food spoon surface is that parallelogram distributes.

Claims (1)

1, the non-smooth table parts of bionical reducing adhesion are made up of non-smooth surface and matrix, it is characterized in that non-smooth surface is made up of a plurality of cell cube spherical crowns of regular distribution on smooth surface, the geometric configuration of cell cube spherical crown, quantity and be distributed as:

A) height of cell cube spherical crown

All the other

When (a, b) and (x, y) were overlapping, following formula can be simplified to: Z=R-Rcos θ

In the formula:

Z-cell cube spherical crown height, value is: 1mm～4mm;

A, at the bottom of b-cell cube spherical crown circle at x, the coordinate on the y plane;

R-cell cube spherical crown radius, R=d/2sin θ;

θ-cell cube spherical crown centre of sphere angle, value can: 20 °～40 °;

The nominal intended diameter of circle at the bottom of d-cell cube spherical crown, value can be at 1mm～40mm;

B) cell cube spherical crown quantity

In the formula:

K-proportionality coefficient;

d ₀-reference diameter, value can be 3.5～4.0;

L _d-equivalent length;

L _x, L _yThe length of-physical unit or product and width;

N _a-cell cube spherical crown quantity;

k ₁, k ₂-be constant, k ₁=0.213～0.268, k ₂=0.129～0.181;

C) cell cube spherical crown distributing position is obeyed rule or rectangular distribution, and each cell cube spherical crown must satisfy a, and b is with L _x, L _yBe condition in the oblong on limit: $\sqrt{{(a_i-b_j)}^2+{(b_i+b_j)}^2}>d---\left(3\right)$

In the formula:

I, j-be any cell cube spherical crown sequence number a _i, b _i-be a certain cell cube at x, the position a on the y _j, b _j-be another cell cube at x, the position on the y.

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