CN204849110U - Cut air -flowing type liquid bridge generater on every side - Google Patents

Abstract

The utility model provides a cut air -flowing type liquid bridge generater on every side, belongs to fluid physics technical field, especially relates to a cut air -flowing type liquid bridge generater on every side, cuts the long -pending influence of comparing liquid bridge interface shape of air current and liquid pontic around the research of this liquid bridge generater mainly used. The utility model discloses a support, bridge post mounting hole on the upper portion of support has, the lower part has lower bridge post mounting hole, install the bridge post perpendicularly in last bridge post mounting hole, install bridge post down under in the bridge post mounting hole perpendicularly, be provided with the fastening screw of bridge post on the support of last bridge post mounting hole side, going up the bridge post and being provided with the observation sleeve pipe down between the bridge post, upward the end of giving vent to anger of bridge post and lower bridge post all sets up at the observation cover intraductally, go up the bridge post and constitute with the hanging wall by the last sleeve pipe of evenly supplying gas, upward evenly supply gas the coaxial suit of sleeve pipe in the hanging wall outside, the bridge post comprises evenly supply gas down sleeve pipe and lower wall down, and the coaxial suit of sleeve pipe of evenly supplying gas down is outside at the lower wall.

Description

A kind of liquid of shear flow formula around bridge maker

Technical field

The utility model belongs to fluid physics technical field, and particularly relate to a kind of liquid of shear flow formula around bridge maker, this liquid bridge maker is mainly used in research, and around shear flow and liquid pontic amass the impact of comparison liquid bridge interface shape.

Background technology

In existing engineering practice, usually adopt crystal growth with floating zone method technology to prepare high quality crystal, the physical model for simulating crystal growth with floating zone method process is called liquid bridge.Engineering practice and theoretical investigation show: around shear flow and liquid bridge volume ratio are the important factors affecting liquid bridge interface shape.Therefore, the affecting laws that research surrounding shear flow and liquid pontic amass comparison liquid bridge interface is significant with improving the quality of products to control crystal growth.

But, the experimental study carried out for shear flow and liquid bridge volume ratio is also in the starting stage, considerably less for the document of this respect both at home and abroad, rare experimental study also generates the shortcomings such as device structure complexity, function singleness because of its liquid bridge and can not extensively promote.

Therefore, for meeting current experiment demand, needing the New bridge maker that a kind of structure is simple, multiple functional badly, the shear flow of different size and different directions can be produced, and can adjusted volume ratio arbitrarily.

Utility model content

For prior art Problems existing, the utility model provides a kind of liquid of shear flow formula around bridge maker.This liquid bridge maker can produce the shear flow of different size and different directions by upper and lower sleeve pipe of evenly supplying gas around liquid bridge; And by regulating the height of upper bridge post, different volume ratios can be produced.

To achieve these goals, the utility model adopts following technical scheme: a kind of liquid of shear flow formula around bridge maker, and comprise support, bridge post open holes on the top of support has, bottom has lower bridge post open holes; In upper bridge post open holes, be vertically installed with bridge post, in lower bridge post open holes, be vertically installed with lower bridge post, the support of upper bridge post open holes side is provided with the trip bolt of bridge post; On described, be provided with observation sleeve pipe between bridge post and lower bridge post, the outlet side of upper bridge post and lower bridge post is all arranged on to be observed in sleeve pipe; Described upper bridge post is made up of upper sleeve pipe and the upper dish of evenly supplying gas, and upper sleeve pipe coaxial package of evenly supplying gas is outside at upper dish; Described lower bridge post is made up of lower sleeve pipe and the lower wall of evenly supplying gas, and lower sleeve pipe coaxial package of evenly supplying gas is outside at lower wall.

Evenly supply gas on the described outlet side of sleeve pipe and lower sleeve pipe of evenly supplying gas evenly is provided with four projections respectively.

Outside described lower sleeve pipe of evenly supplying gas, be set with snap ring, lower bridge post is arranged in the lower bridge post open holes of support by described snap ring.

Described observation sleeve pipe adopts glass bushing.

The beneficial effects of the utility model:

The utility model structure is simple, and function is unique; Can form parallel shear flow at upper and lower end to liquid bridge respectively by upper and lower sleeve pipe of evenly supplying gas, and the direction of air-flow can unrestricted choice, namely can produce the shear flow of different size and different directions around liquid bridge; And by regulating the height of upper bridge post, different volume ratios can be produced.

Accompanying drawing explanation

Fig. 1 is the one-piece construction schematic diagram of liquid bridge maker of the present utility model;

Fig. 2 is the structural representation of upper bridge post of the present utility model;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the structural representation of lower bridge post of the present utility model;

Fig. 5 is the left view of Fig. 4;

Wherein: 1-support, bridge post under 2-, the upper bridge post of 3-, 4-trip bolt, the upper dish of 5-, sleeve pipe that 6-evenly supplies gas, 7-lower wall, 8-snap ring, sleeve pipe of evenly supplying gas under 9-, 10-projection, 11-observes sleeve pipe.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model done and describe in detail further.

As shown in Fig. 1 ~ Fig. 5, a kind of liquid of shear flow formula around bridge maker, comprise passive support 1, bridge post open holes on the top of support 1 has, bottom has lower bridge post open holes; In upper bridge post open holes, be vertically installed with bridge post 3, in lower bridge post open holes, be vertically installed with lower bridge post 2, the support 1 of upper bridge post open holes side is provided with the trip bolt 4 of bridge post 3; Be provided with between bridge post 3 and lower bridge post 2 on described and observe sleeve pipe 11, the outlet side of upper bridge post 3 and lower bridge post 2 is all arranged on to be observed in sleeve pipe 11; Described upper bridge post 3 is made up of upper sleeve pipe 6 and the upper dish 5 of evenly supplying gas, and upper sleeve pipe 6 coaxial package of evenly supplying gas is outside at upper dish 5, upper sleeve pipe 6 and upper dish 5 compact siro spinning technology of evenly supplying gas; Described lower bridge post 2 is made up of lower sleeve pipe 9 and the lower wall 7 of evenly supplying gas, and lower sleeve pipe 9 coaxial package of evenly supplying gas is outside at lower wall 7, lower sleeve pipe 9 and lower wall 7 compact siro spinning technology of evenly supplying gas.

Evenly supply gas on the described outlet side of sleeve pipe 6 and lower sleeve pipe 9 of evenly supplying gas evenly is provided with four projections 10 respectively.

Outside described lower sleeve pipe 9 of evenly supplying gas, be set with snap ring 8, lower bridge post 2 is arranged in the lower bridge post open holes of support 1 by described snap ring 8.

Described observation sleeve pipe 11 adopts glass bushing.

Below in conjunction with accompanying drawing, a use procedure of the present utility model is described:

As shown in Fig. 1 ~ Fig. 5, first inject between upper dish 5 and lower wall 7 by experimental liquid exactly by Miniature injection pump, form liquid bridge, static liquid bridge maintains interface shape by surface tension.Then first gas is sent in ball flow meter, control gas flow by ball flow meter, more experimentally gas is sent into the sleeve pipe 6 or evenly to supply gas in sleeve pipe 9 down of evenly supplying gas by demand.

Liquid bridge maker of the present utility model is utilized to study gas velocity, air flow line and volume ratio to the impact of liquid bridge interface shape, by following three specific experiment scheme implementations:

Experimental program one: air flow line and volume ratio certain when, convert different gas velocities, research gas velocity on the impact of liquid bridge interface shape.Because the diameter of the upper sleeve pipe 6 of evenly supplying gas of liquid bridge maker of the present utility model, lower sleeve pipe 9 of evenly supplying gas, upper dish 5 and lower wall 7 is all definite value, so just can gas velocity be changed by the flow controlling gas.Gas velocity calculated by gas flow Q, its calculating formula is:

$U_0^g=\frac{Q}{\mathrm{\π}(R_{\mathrm{out}}^2-R_0^2)}$

In formula, -gas velocity, Q-gas flow, R _outthe external diameter of-observation sleeve pipe, R ₀the internal diameter of-observation sleeve pipe.

Gas flow Q is recorded by ball flow meter, observes the external diameter R of sleeve pipe _outwith internal diameter R ₀for definite value, record by vernier callipers.

Experimental program two: air flow line and gas velocity certain when, convert different volume ratios, research volume ratio on the impact of liquid bridge interface shape.Volume ratio V equals liquid pontic and amasss V ₀and the cylindrical volume V between upper and lower dish ₁ratio.Because the diameter of upper and lower dish is certain, so the cylindrical volume V between upper and lower dish just can be changed by the height of the upper bridge post 3 of adjustment ₁, meanwhile, also the corresponding liquid pontic that changes amasss V ₀.When upper bridge post 3 reaches the height of requirement of experiment, trip bolt 4 is utilized to fix its position; Wherein, liquid pontic amasss V ₀by high-speed camera shooting liquid bridge interface shape, then calculate according to the digital picture of liquid bridge interface shape, its calculating formula is:

$V_0=\frac{1}{{\mathrm{dR}}_0^2}{\∫}_0^{d_1}{F}^2\left(z\right)\mathrm{dZ}$

In formula, V ₀-liquid pontic amasss, d ₁distance between-upper and lower dish, R ₀the internal diameter of-observation sleeve pipe, the digital picture function of F (z)-liquid bridge interface shape.

Cylindrical volume V between upper and lower dish ₁by the diameter d of upper and lower dish ₀and the distance d between upper and lower dish ₁determine, its calculating formula is:

$V_1=\mathrm{\π}{d}_1{\left(\frac{d_0}{2}\right)}^2$

In formula, V ₁cylindrical volume between-upper and lower dish, d ₁distance between-upper and lower dish, d ₀the diameter of-upper and lower dish.

The diameter d of upper and lower dish ₀for definite value, record by vernier callipers, the distance d between upper and lower dish ₁be experimental variable, different d can be obtained by mobile upper bridge post 3 ₁.

Experimental program three: volume ratio and gas velocity certain when, convert different air flow lines, research air flow line on the impact of liquid bridge interface shape.Liquid bridge maker of the present utility model can provide two kinds of air flow lines: 1), air-flow injects from upper sleeve pipe 6 of evenly supplying gas, and namely air flow line is consistent with gravity direction; 2), air-flow injects from lower sleeve pipe 9 of evenly supplying gas, and namely air flow line is contrary with gravity direction.

In whole experimentation, each variable, on the impact of liquid bridge interface shape, is further analyzed by the different shapes at high-speed camera shooting liquid bridge interface.

Claims (4)

1. a shear flow formula liquid bridge maker around, it is characterized in that comprising support, bridge post open holes on the top of support has, bottom has lower bridge post open holes; In upper bridge post open holes, be vertically installed with bridge post, in lower bridge post open holes, be vertically installed with lower bridge post, the support of upper bridge post open holes side is provided with the trip bolt of bridge post; On described, be provided with observation sleeve pipe between bridge post and lower bridge post, the outlet side of upper bridge post and lower bridge post is all arranged on to be observed in sleeve pipe; Described upper bridge post is made up of upper sleeve pipe and the upper dish of evenly supplying gas, and upper sleeve pipe coaxial package of evenly supplying gas is outside at upper dish; Described lower bridge post is made up of lower sleeve pipe and the lower wall of evenly supplying gas, and lower sleeve pipe coaxial package of evenly supplying gas is outside at lower wall.

2. surrounding shear flow formula liquid bridge maker according to claim 1, the outlet side of it is characterized in that evenly supplying gas on described sleeve pipe and lower sleeve pipe of evenly supplying gas evenly is provided with four projections respectively.

3. surrounding shear flow formula liquid bridge maker according to claim 1, it is characterized in that being set with snap ring outside described lower sleeve pipe of evenly supplying gas, lower bridge post is arranged in the lower bridge post open holes of support by described snap ring.

4. surrounding shear flow formula liquid bridge maker according to claim 1, is characterized in that described observation sleeve pipe adopts glass bushing.