1. The utility model provides a single drop hangs burning experimental apparatus which characterized in that, includes along the suspension wire fixed knot who arranges around the axial and liquid drop ignition structure, liquid drop ignition structure includes: the heating wire sliding support (2) and the telescopic sliding device are axially connected;

the suspension wire fixing structure includes: the suspension wire adjusting device comprises a suspension wire fixing support (6), a sliding support base (11) and two suspension wire adjusting sliding supports (9); wherein: the suspension wire fixing support (6) and the sliding support base (11) are arranged in a left-right corresponding and opposite mode, and the suspension wire adjusting sliding support (9) is vertically arranged on the sliding support base (11) and can move left and right along the sliding support base (11); the suspension wire fixing support (6) is a U-shaped frame with an upward opening, and two long arms of the U-shaped frame are arranged in front and at the back; the two long arms and the two suspension wire adjusting sliding supports (9) are arranged in a rectangular shape, a silicon carbide suspension wire (7) is connected between the long arm positioned on the same diagonal line and the suspension wire adjusting sliding support (9), the two silicon carbide suspension wires (7) are intersected at the center, and the intersection is used for bearing liquid drops (8) in a tensioned state;

the heating wire sliding support (2) is a U-shaped plate with an opening facing the suspension wire fixing structure, a groove is formed in the upper wall surface of a top plate of the U-shaped plate, one or more ceramic rods (23) are arranged in the groove at intervals in parallel, and the ceramic rods (23) are wound with nickel-chromium heating wires (3) connected in series; the telescopic sliding device is used for driving the heating wire sliding support (2) to slide back and forth so as to ensure that: during heating, the heating wire sliding bracket (2) moves forwards, so that the liquid drops are positioned above the nickel-chromium heating wire (3); after the liquid drops are heated and ignited, the heating wire sliding support (2) moves backwards and resets.

2. The single-drop suspension combustion experimental device as claimed in claim 1, wherein the sliding bracket base (11) is a U-shaped support plate with an upward opening, two sliding bracket limiting grooves (16) are arranged at intervals in the front and back of the bottom in the U-shaped opening, and each sliding bracket limiting groove (16) is formed along the left and right direction and used for fixing the suspension wire adjusting sliding bracket (9);

two through holes are respectively arranged on the front side plate and the rear side plate of the sliding support base (11) in a penetrating manner, and the two through holes are arranged at intervals in the front and rear directions and are positioned at the position of each sliding support limiting groove (16); a suspension wire adjusting screw is installed in the front through hole and the rear through hole at the corresponding positions in a penetrating manner, and a suspension wire adjusting knob (10) is arranged at the outer end part of the suspension wire adjusting screw;

the two suspension wire adjusting sliding supports (9) are vertically arranged in a sliding support limiting groove (16) at intervals in the front-back direction, a threaded hole (17) is formed in each suspension wire adjusting sliding support (9) in a left-right through mode, the threaded holes (17) and the through holes are in the same straight line, and the threaded holes (17) are through channels of suspension wire adjusting screws;

when the suspension wire adjusting knob (10) is screwed, the suspension wire adjusting sliding support (9) is driven to move left and right, and the distance between the suspension wire adjusting sliding support (9) and the suspension wire fixing support (6) is changed.

3. The single-drop suspension combustion experimental device as claimed in claim 1 or 2, wherein four suspension wire positioning columns (5) are vertically arranged between the suspension wire adjusting sliding support (9) and the suspension wire fixing support (6), the suspension wire positioning columns (5) are grouped in pairs, one group is located near the two suspension wire adjusting sliding supports (9), and the other group is located near the suspension wire fixing support (6); the suspension wire fixing brackets in the same group are respectively close to an adjusting sliding bracket or a suspension wire fixing bracket;

and connecting two suspension wire positioning upright columns (5) in the same group, wherein the two suspension wire positioning upright columns (5) are arranged on the outer sides of the closest diagonal lines of the two suspension wire positioning upright columns, and the suspension wire positioning upright columns (5) are used for expanding outwards and supporting the silicon carbide suspension wires (7).

4. The single-drop suspension combustion experimental device as claimed in claim 2, wherein the upper end of each suspension wire adjusting sliding support (9) is coaxially and integrally connected with a magnet block adsorption end I (19), the lower end of each suspension wire adjusting sliding support is coaxially and integrally connected with a sliding support sliding end (18), the suspension wire adjusting sliding support (9), the magnet block adsorption end I (19) and the sliding support sliding end (18) are respectively provided with a column, the dimensions of the magnet block adsorption end I (19) and the sliding support sliding end (18) are respectively smaller than those of the adjusting sliding support (9), platforms are respectively formed in front of and behind the top end of the suspension wire adjusting sliding support (9), the platforms on the sides, which are deviated from the suspension wire adjusting sliding supports (9), of the two suspension wire adjusting sliding supports are used for bearing the magnet block (4), and the side wall of the magnet block (4) is tightly attached to the side wall of the iron block adsorption end I (19), the end of the silicon carbide suspension wire (7) is clamped and fixed between the side walls.

5. The single-drop suspension combustion experimental device as claimed in claim 4, wherein the two long arms are composed of two vertical columns connected in the vertical direction, the vertical column at the upper part is a second magnet block adsorption end (20), the length of the second magnet block adsorption end (20) in the front-back direction is smaller than that of the vertical column at the lower part, the second magnet block adsorption end is located close to the opening side of the U-shaped column, so as to form a bearing platform at the upper end of the lower vertical column, which is far away from the opening side of the U-shaped column, each bearing platform is used for bearing the magnet block (4), the side wall of the magnet block (4) is tightly attached to the side wall of the corresponding second magnet block adsorption end (20), and the end of the silicon carbide suspension wire (7) is clamped between the side walls.

6. A single drop hanging combustion experiment device according to claim 5, wherein said telescopic slide means comprises:

the electromagnetic telescopic rod fixing support (14) is a U-shaped plate with an upward opening, and the bottom of the electromagnetic telescopic rod fixing support is arranged on the bottom plate (13);

the electromagnetic telescopic rod (1) is a push-pull electromagnet and is arranged in the electromagnetic telescopic rod fixing support (14), and the front end of the electromagnetic telescopic rod (1) is connected with the rear end of the heating wire sliding support (2); when the heating wire is in a power-on state, the electromagnetic telescopic rod (1) extends forwards to drive the heating wire sliding support (2) to move forwards; when the power is off, the electromagnetic telescopic rod (1) drives the heating wire sliding support (2) to return backwards.

7. The single drop hanging combustion experiment device of claim 6, wherein the telescoping slide further comprises:

the two support sliding protrusions (24) are symmetrically arranged on the left side and the right side of the vertical plate of the heating wire sliding support (2) and extend towards the outer side of the vertical plate;

the two heating wire support plates (12) are fixed on two side walls of the electromagnetic telescopic rod fixing support (14), the direction of the heating wire support plates is consistent with the front and back direction of the heating wire support plates (12), and the front ends of the heating wire support plates (12) cross the position of the front ends of the electromagnetic telescopic rod fixing support (14);

a strip-shaped opening sliding groove is formed in the position, close to the front end, of each heating wire support plate (12), the strip-shaped opening sliding grooves are arranged along the front and back direction, and the two strip-shaped opening sliding grooves correspond to each other in position; the strip-shaped opening sliding groove is internally used for erecting a support sliding protrusion (24) and the support sliding protrusion (24) slides in the support sliding groove.

8. The single-drop hanging combustion experiment device as claimed in claim 7, wherein a V-shaped groove (21) is formed in the side wall of each suspension wire positioning column (5) close to the upper end of the suspension wire positioning column around the periphery of the suspension wire positioning column, and the heights of the V-shaped grooves (21) are the same and are used for clamping the silicon carbide suspension wires (7).

9. A single drop hanging combustion experimental set-up according to claim 8, characterized in that the diameter of the silicon carbide suspension wires (7) is less than 20 microns.

10. The single-drop suspension combustion experiment device is characterized in that a limiting protrusion (29) protruding upwards is arranged at the end part of the rear end of the electromagnetic telescopic rod (1) around one circumference of the electromagnetic telescopic rod, and a return spring (28) is coaxially sleeved on the electromagnetic telescopic rod (1) and positioned in front of the limiting protrusion (29); the front end of the electromagnetic telescopic rod (1) is provided with a connecting threaded rod (27); when the electromagnetic telescopic rod (1) is electrified, the connecting threaded rod (27) extends forwards, and the return spring (28) is compressed; after the power failure, under the elastic force of the return spring (28), the connecting threaded rod (27) retracts backwards to return.

Background

High energy fuel technology is key to improving aircraft performance. In recent years, the development of hydrocarbon fuels is heading toward high density and high energy. The method is characterized in that high-energy nano particles are added into the traditional hydrocarbon fuel to form stable suspension to prepare the nano fluid fuel, and the method is an important means for improving the energy of the liquid fuel. In order to better understand the combustion mechanism of novel fuel droplets, provide basis for improving the combustion efficiency and energy characteristics of the fuel, develop a single-droplet ignition combustion experiment, and research the combustion characteristics of the nano fluid fuel and the influence law of each component.

The method has the characteristics of low cost, high feasibility, convenience in observation and the like by aiming at the research of the ignition combustion test of a single liquid drop, and is a basic research method widely adopted for researching the combustion characteristics of the fuel. At present, a single-drop combustion experimental device mostly adopts a suspension wire method. In the existing drop device of the suspension method, the diameter of a suspension wire is generally close to hundred micrometers, and the drop device has a large influence on the combustion process of micro drops. Meanwhile, as the suspension wires are thin, the fine operation is difficult, and much time and energy are wasted when the suspension wires are replaced in an experiment. In addition, the position of the suspension wire is inaccurate, so that the position of the liquid drop ignition device and the position of the liquid drop can be deviated, and the error of experimental data is increased. Therefore, there is a need to improve the existing droplet dispensing apparatus by the wire suspension method

Disclosure of Invention

The invention aims to provide a single-droplet suspension combustion experimental device, which ensures that the ignition state of each droplet is the same, the position of the droplet is the same, the adjustment is convenient, and the influence on the droplet combustion process is small due to the use of a small-diameter silicon carbide suspension wire.

The invention adopts the following technical scheme: the utility model provides a single drop hangs burning experimental apparatus, includes along the suspension wire fixed knot who arranges around the axial and liquid drop ignition structure, liquid drop ignition structure includes: a heating wire sliding support and a telescopic sliding device which are axially connected.

The suspension wire fixing structure includes: the suspension wire fixing support, the sliding support base and the two suspension wire adjusting sliding supports; wherein: the suspension wire fixing support and the sliding support base are arranged in a left-right corresponding and opposite mode, and the suspension wire adjusting sliding support is vertically arranged on the sliding support base and can move left and right along the sliding support base; the suspension wire fixing bracket is a U-shaped bracket with an upward opening, and two long arms of the U-shaped bracket are arranged in front and at the back; the two long arms and the two suspension wire adjusting sliding supports are arranged in a rectangular shape, a silicon carbide suspension wire is connected between the long arm on the same diagonal line and the suspension wire adjusting sliding supports, the two silicon carbide suspension wires are intersected at the center, and the intersection is used for bearing liquid drops in a tensioning state.

The heating wire sliding support is a U-shaped plate with an opening facing the suspension wire fixing structure, a groove is formed in the upper wall surface of a top plate of the U-shaped plate, one or more ceramic rods are arranged in the groove at intervals in parallel, and a series-connected nickel-chromium heating wire is wound on each ceramic rod; the telescopic sliding device is used for driving the heating wire sliding support to slide back and forth so as to ensure that: during heating, the heating wire sliding support moves forwards, so that the liquid drops are positioned above the nickel-chromium heating wire; after the liquid drops are heated and ignited, the heating wire sliding support moves backwards and resets.

Furthermore, the sliding support base is a U-shaped support plate with an upward opening, two sliding support limiting grooves are arranged at the front and back of the bottom in the U-shaped opening at intervals, and each sliding support limiting groove is arranged along the left and right directions and is used for fixing the suspension wire adjusting sliding support; two through holes are formed in the front side plate and the rear side plate of the sliding support base in a penetrating manner, are arranged at intervals in the front and rear directions and are positioned at the limiting grooves of the sliding supports; a suspension wire adjusting screw is installed in the front through hole and the rear through hole at the corresponding positions in a penetrating way, and a suspension wire adjusting knob is arranged at the outer end part of the suspension wire adjusting screw.

The front and back intervals of the two suspension wire adjusting sliding supports are vertically arranged in the sliding support limiting grooves, a threaded hole is formed in each suspension wire adjusting sliding support in a left-right through mode, the threaded holes and the through holes are in the same straight line, and the threaded holes are through channels of suspension wire adjusting screws. When the suspension wire adjusting knob is screwed, the suspension wire adjusting sliding support is driven to move left and right, and the distance between the suspension wire adjusting sliding support and the suspension wire fixing support is changed.

Furthermore, four suspension wire positioning upright columns are vertically arranged between the suspension wire adjusting sliding support and the suspension wire fixing support, every two suspension wire positioning upright columns are in one group, one group is positioned close to the two suspension wire adjusting sliding supports, and the other group is positioned close to the suspension wire fixing support; the suspension wire positioning upright columns in the same group are respectively close to an adjusting sliding support or a suspension wire fixing support; and the suspension wire positioning upright columns in the same group are on the same front-back axis.

And connecting the two suspension wire positioning upright columns in the same group, wherein the two suspension wire positioning upright columns are arranged at the outer sides of the closest diagonal lines of the two suspension wire positioning upright columns, and the suspension wire positioning upright columns are used for expanding outwards and supporting the silicon carbide suspension wires.

Further, the upper end of each suspension wire adjusting sliding support is coaxially and integrally connected with a magnet block adsorption end I, the lower end of each suspension wire adjusting sliding support is coaxially and integrally connected with a sliding support sliding end, the suspension wire adjusting sliding support, the magnet block adsorption end I and the sliding support sliding end are respectively smaller than the sliding support adjusting sliding support, a platform is respectively formed around the top end of the suspension wire adjusting sliding support, the two suspension wires adjusting sliding support deviating from the platform on the side for bearing the magnet block, the side wall of the magnet block is tightly attached to the side wall of the iron block adsorption end I, and an end head for fixing the silicon carbide suspension wire is arranged between the side walls.

Further, two long arms constitute by two stands that connect in vertical direction, the stand that is located the upper portion is magnet piece adsorption end two, the length on the fore-and-aft direction of magnet piece adsorption end two is less than the length of lower part stand, and it is located and is close to the U-shaped opening side to keep away from U-shaped opening side formation a load-bearing platform in lower part stand upper end, all be used for bearing the weight of the magnet block on each load-bearing platform, closely laminate between the lateral wall of the magnet block and the lateral wall of the magnet piece adsorption end two that corresponds, be used for holding the end of fixed carborundum suspension between the lateral wall.

Further, the telescopic sliding apparatus includes: the electromagnetic telescopic rod fixing support is a U-shaped plate with an upward opening, and the bottom of the electromagnetic telescopic rod fixing support is arranged on the bottom plate; the electromagnetic telescopic rod is a push-pull electromagnet and is arranged in the electromagnetic telescopic rod fixing support, and the front end of the electromagnetic telescopic rod is connected with the rear end of the heating wire sliding support; when the power is on, the electromagnetic telescopic rod extends forwards to drive the heating wire sliding support to move forwards; when the power is off, the electromagnetic telescopic rod drives the heating wire sliding support to return backwards.

Further, the telescopic sliding apparatus further comprises: the two support sliding bulges are symmetrically arranged on the left side and the right side of the vertical plate of the heating wire sliding support and extend towards the outer side of the vertical plate;

the two heating wire support plates are fixed on two side walls of the electromagnetic telescopic rod fixing support, the trend of the heating wire support plates is consistent with the front and back trend of the heating wire support plates, and the front ends of the heating wire support plates cross the position of the front ends of the electromagnetic telescopic rod fixing support;

a strip-shaped opening sliding groove is formed in the position, close to the front end, of each heating wire support plate, the strip-shaped opening sliding grooves are arranged along the front-back direction, and the two strip-shaped opening sliding grooves are corresponding in position; the strip-shaped opening sliding groove is internally provided with a bracket sliding protrusion for the bracket sliding protrusion to slide in.

Furthermore, V-shaped grooves are formed in the side wall, close to the upper end, of each suspension wire positioning stand column around the periphery of the side wall, and the V-shaped grooves are identical in height and used for clamping the silicon carbide suspension wires.

Further, the diameter of the silicon carbide suspension wire is less than 20 microns.

Furthermore, a limit protrusion protruding upwards is arranged at the end part of the rear end of the electromagnetic telescopic rod around one circumference of the electromagnetic telescopic rod, and a return spring is coaxially sleeved on the electromagnetic telescopic rod and positioned in front of the limit protrusion; the front end of the electromagnetic telescopic rod is provided with a connecting threaded rod; when the electromagnetic telescopic rod is electrified, the connecting threaded rod extends forwards, and the return spring is compressed; after the power failure, the connecting threaded rod retracts backwards to return under the elastic force of the return spring.

The invention has the beneficial effects that: 1. the nickel-chromium heating wire is used for heating and igniting, so that the same liquid drop ignition state is ensured every time. 2. Fixed through magnet piece centre gripping mode, adopted the diameter to be less than 20 microns carborundum suspension wire to adjust the elasticity of carborundum suspension wire through knob suspension wire adjust knob, avoided operating by a wide margin, be difficult for causing the destruction to carborundum suspension wire. Meanwhile, the suspension wire is easy to operate and convenient to replace, and time is saved. 3. The liquid drops are positioned at the intersection of the silicon carbide suspension wires, the positions of the liquid drops are not interfered by other factors, and the positions of the suspension wires in each experiment can be ensured to be unchanged and the positions of the liquid drops are the same. 4. Through the flexible of electromagnetism telescopic link, make heater sliding support back-and-forth movement, during the heating ignition, the liquid drop is located heater sliding support's U-shaped space, and the zone of heating is accurate fixed, avoids causing the heat damage to other devices.

Drawings

FIG. 1 is a schematic structural diagram of a single-drop suspension combustion experimental apparatus;

FIG. 2 is a schematic structural view of a heater sliding bracket;

FIG. 3 is a schematic structural view of the electromagnetic telescopic rod;

FIG. 4 is a schematic structural view of a suspension fixation structure after suspension fixation;

FIG. 5 is a schematic structural view of a base of the sliding support;

FIG. 6 is a schematic view of the structure of the suspension wire adjusting sliding bracket;

FIG. 7 is a schematic structural view of the long arm of the suspension wire fixing bracket;

FIG. 8 is a schematic structural view of a suspension positioning column;

wherein: 1. the electromagnetic expansion rod comprises an electromagnetic expansion rod, 2 parts of a heating wire sliding support, 3 parts of a nickel-chromium heating wire, 4 parts of a magnet block, 5 parts of a suspension wire positioning upright post, 6 parts of a suspension wire fixing support, 7 parts of a silicon carbide suspension wire, 8 parts of a liquid drop, 9 parts of a suspension wire adjusting sliding support, 10 parts of a suspension wire adjusting knob, 11 parts of a sliding support base, 12 parts of a heating wire support sliding rail, 13 parts of a bottom plate, 14 parts of an electromagnetic expansion rod fixing support, 15 parts of a knob mounting through hole, 16 parts of a sliding support limiting groove, 17 parts of a knob mounting threaded hole, 18 parts of a sliding support sliding end, 19 parts of a magnet block adsorption end I, 20 parts of a magnet block adsorption end II, 21 parts of a V-shaped groove, 22 parts of a fixed threaded rod, 23 parts of a ceramic rod, 24 parts of a support sliding protrusion, 25 parts of an electric wire fixing structure, 26 parts of an expansion rod mounting hole, 27 parts of a connecting threaded rod, 28 parts of a return spring and 29 parts of an expansion rod limiting protrusion.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention relates to a single-droplet suspension combustion experimental device, which comprises a bottom plate 13, a droplet ignition structure and a suspension wire fixing structure as shown in figure 1, wherein: the bottom plate 13 is a horizontally placed plate body; the suspension wire fixing structure and the liquid drop ignition structure are arranged on the bottom plate 13 and are arranged back and forth along the axial direction.

The above-mentioned droplet ignition structure includes: the heating wire sliding support 2 and the telescopic sliding device are axially connected, and the telescopic sliding device is used for driving the heating wire sliding support 2 to slide back and forth; wherein:

as shown in fig. 2, the heater sliding bracket 2 is a U-shaped plate with an opening facing the suspension wire fixing structure, a heating area is provided above the U-shape, and when heating, the heater sliding bracket 2 moves forward to make the liquid drop above the nichrome heater 3. After the liquid drops are heated and ignited, the heating wire sliding support 2 moves backwards and resets. The vertical plate of the heating wire sliding support 2 is axially provided with a through hole 26 for sleeving and fixing the front end of the electromagnetic telescopic rod 1.

The upper wall surface of the top plate of the U-shaped plate is provided with a groove, one or more ceramic rods 23 are arranged in the groove at intervals in parallel, the two ceramic rods 23 are wound with the nickel-chromium heating wires 3 connected in series, and two ends of the nickel-chromium heating wires 3 are connected with a power supply. The two ends of the nickel-chromium heating wire 3 are respectively connected with an insulating material when being led out, and then are fixed on the back of the bottom plate.

The telescopic sliding device comprises: the electromagnetic telescopic rod fixing bracket 14 is a U-shaped plate with an upward opening, and the bottom of the electromagnetic telescopic rod fixing bracket is mounted on the bottom plate 13.

As shown in fig. 3, the electromagnetic telescopic rod 1, which is a push-pull electromagnet, is disposed in the electromagnetic telescopic rod fixing bracket 14, and the front end thereof is connected to the rear end of the heating wire sliding bracket 2; when the power is on, the electromagnetic telescopic rod 1 extends forwards to drive the heating wire sliding support 2 to move forwards; when the power is off, the electromagnetic telescopic rod 1 drives the heating wire sliding support 2 to return backwards.

The concrete structure is as follows: the rear end part of the electromagnetic telescopic rod 1 is provided with a limit protrusion 29 protruding upwards around the circumference of the rear end part, and a return spring 28 is coaxially sleeved on the electromagnetic telescopic rod 1 and positioned in front of the limit protrusion 29; the front end of the electromagnetic telescopic rod 1 is provided with a connecting threaded rod 27; when the electromagnetic telescopic rod 1 is electrified, the connecting threaded rod 27 extends forwards, and the return spring 28 is compressed; after power-off, the connecting threaded rod 27 is retracted backward to return under the elastic force of the return spring 28.

The above-mentioned telescopic sliding device further includes:

the two support sliding protrusions 24 are symmetrically arranged on the left side and the right side of the vertical plate of the heating wire sliding support 2 and extend towards the outer side of the vertical plate.

The two heating wire support plates 12 are fixed on two side walls of the electromagnetic telescopic rod fixing support 14, the moving direction of the two heating wire support plates is consistent with the front-back moving direction of the heating wire support plates 12, and the front ends of the heating wire support plates 12 cross the position of the front ends of the electromagnetic telescopic rod fixing support 14. A strip-shaped opening sliding groove is formed in the position, close to the front end, of each heating wire support plate 12, the strip-shaped opening sliding grooves are arranged along the front-back direction, and the two strip-shaped opening sliding grooves are corresponding in position; the strip-shaped opening sliding groove is used for erecting the bracket sliding protrusion 24 and the bracket sliding protrusion 24 slides in the strip-shaped opening sliding groove.

As shown in fig. 4, 5, 6 and 7, the suspension wire fixing structure includes: the suspension wire fixing support 6, the sliding support base 11 and the two suspension wire adjusting sliding supports 9; wherein: the suspension wire fixing support 6 and the sliding support base 11 are both arranged on the bottom plate 13 and are positioned on the left or right side of the bottom plate 13, and the positions of the suspension wire fixing support and the sliding support base correspond to each other; the suspension wire adjusting sliding support 9 is vertically arranged on the sliding support base 11 and can move left and right along the sliding support base 11.

The suspension wire fixing bracket 6 is a U-shaped bracket with an upward opening, and two long arms of the U-shaped bracket are arranged in front and back; the two long arms and the two suspension wire adjusting sliding supports 9 are arranged in a rectangular shape, a silicon carbide suspension wire 7 is connected between each long arm on the same diagonal line and each suspension wire adjusting sliding support 9, the two silicon carbide suspension wires 7 are intersected at the center, and the intersection is used for bearing liquid drops 8 in a tensioning state.

Two long arms constitute by two cuboid stands that connect in vertical direction, the cuboid stand that is located the upper portion is magnet piece adsorption end two 20, the length on the fore-and-aft direction of magnet piece adsorption end two 20 is less than the length of lower part cuboid stand, and it is located and is close to the U-shaped opening side, form a load-bearing platform with keeping away from the U-shaped opening side on the cuboid stand upper end of lower part, all be used for bearing magnet piece 4 on each load-bearing platform, closely laminate between the lateral wall of magnet piece 4 and the lateral wall of the two 20 of magnet piece adsorption end that correspond, be used for holding the end of fixed carborundum suspension wire 7 between the lateral wall.

The sliding support base 11 is a U-shaped support plate with an upward opening, two sliding support limiting grooves 16 are arranged at the front and the back of the bottom in the U-shaped opening at intervals, and each sliding support limiting groove 16 is arranged along the left and right direction and is used for fixing the suspension wire adjusting sliding support 9.

Two through holes are respectively arranged on the front side plate and the rear side plate of the sliding support base 11 in a penetrating manner, and the two through holes are arranged at intervals in the front and rear directions and are positioned at the limiting grooves 16 of the sliding supports; a suspension wire adjusting screw is installed in the front through hole and the rear through hole at the corresponding positions in a penetrating way, and a suspension wire adjusting knob 10 is arranged at the outer end part of the suspension wire adjusting screw.

The two suspension wire adjusting sliding supports 9 are vertically arranged in the sliding support limiting grooves 16 at intervals, a threaded hole 17 is formed in each suspension wire adjusting sliding support 9 in a left-right through mode, the threaded holes 17 and the through holes are in the same straight line, and the threaded holes 17 are through channels of suspension wire adjusting screws.

When the suspension wire adjusting knob 10 is screwed, the suspension wire adjusting sliding support 9 is driven to move left and right, and the distance between the suspension wire adjusting sliding support 9 and the suspension wire fixing support 6 is changed.

The equal coaxial body in upper end that sliding bracket 9 was adjusted to each suspension wire is connected with a magnet piece and adsorbs end 19, the coaxial body in lower extreme is connected with sliding bracket sliding end 18, sliding bracket 9 is adjusted to the suspension wire, magnet piece adsorbs end 19 and sliding bracket sliding end 18 is the cuboid stand, and the size that magnet piece adsorbs end 19 and sliding bracket sliding end 18 all is less than the size of adjusting sliding bracket 9, all form a platform around the top of sliding bracket 9 is adjusted to the suspension wire, be used for bearing magnet block 4 on the platform of the side that deviates from of sliding bracket 9 is adjusted to two suspension wires, and the lateral wall of magnet block 4 and the inseparable laminating of the lateral wall of iron block adsorption end 19, be used for holding the end of fixed carborundum suspension wire 7 between the lateral wall.

As shown in fig. 8, four suspension wire positioning columns 5 are vertically arranged on the bottom plate 13 between the suspension wire adjusting sliding support 9 and the suspension wire fixing support 6, each two suspension wire positioning columns 5 form a group, one group is located near the two suspension wire adjusting sliding supports 9, and the other group is located near the suspension wire fixing support 6. The suspension wire fixing brackets in the same group are respectively close to an adjusting sliding bracket or a suspension wire fixing bracket; and connecting the two suspension wire positioning upright columns 5 in the same group, wherein the two suspension wire positioning upright columns 5 are positioned at the outer sides of the closest diagonal lines, and the suspension wire positioning upright columns 5 are used for expanding outwards and supporting the silicon carbide suspension wires 7.

V-shaped grooves 21 are formed in the side wall, close to the upper end, of the suspension wire positioning upright post 5 around the circumference of the suspension wire positioning upright post, and the V-shaped grooves 21 are identical in height and used for clamping the silicon carbide suspension wires 7.

In the invention, the silicon carbide fiber with the diameter less than 20 microns is used as the silicon carbide suspension wire 7, and the silicon carbide suspension wire 7 has small diameter, low heat conductivity coefficient and small heat loss, so that the influence of the suspension wire on the liquid drop combustion process can be reduced, and the accuracy of experimental data is improved. The two silicon carbide suspension wires 7 are ensured to be positioned in the same plane and to be mutually crossed through the liquid drop positioning structure, so that the position of the liquid drop 8 can be better fixed, the relative position of the liquid drop 8 and the nickel-chromium heating wire 3 is ensured to be fixed, and the ignition state of the liquid drop 8 is ensured to be the same during each experiment. The magnet block 4 is used for clamping the silicon carbide suspension wire 7, the fixing difficulty of the silicon carbide suspension wire 7 is reduced, the fixing operation process of the silicon carbide suspension wire 7 is simplified, and the silicon carbide suspension wire is easy to install and disassemble and can reduce damage to the silicon carbide suspension wire 7. After the silicon carbide suspension wires 7 are clamped by the magnet blocks 4, the tightness degree of the silicon carbide suspension wires is different, the suspension wire adjusting knob 10 is used for adjusting the suspension wire adjusting sliding support 9 to move left and right, the distance between the suspension wire adjusting sliding support 9 and the suspension wire fixing support 6 is adjusted, and the silicon carbide suspension wires 7 can be guaranteed to be kept tensioned and are not easily broken.

When in use, firstly, the four magnet blocks 4 are respectively placed on the platforms at the top ends of the corresponding suspension wire adjusting sliding support (9) and the suspension wire fixing support 6, and one surface of the magnet block 4 with the largest area is attached to the magnet block adsorption end two 20 and the magnet block adsorption end one 19.

Then the suspension wire adjusting knob 10 is rotated to move the two suspension wire adjusting sliding brackets 9 to the side close to the suspension wire fixing bracket 6 until the suspension wire adjusting sliding brackets cannot move. And then one end of a silicon carbide suspension wire 7 is placed on the second magnet block adsorption end 20, the magnet block 4 is slowly returned, and the magnet block 4 can clamp one end of the silicon carbide suspension wire 7 after being returned. Then the silicon carbide suspension wires 7 are sequentially arranged in the V-shaped grooves 21 of the nearest suspension wire positioning upright post 5 and the other suspension wire positioning upright post 5 which is opposite to the nearest suspension wire positioning upright post. The silicon carbide suspension wires 7 are tensioned with slight force. The other end of the silicon carbide suspension wire 7 is placed on the magnet block adsorption end 19 at the opposite angle, the magnet block 4 is slowly returned, and the other end of the silicon carbide suspension wire 7 can be clamped after the magnet block 4 is returned. The same operation is performed on the second silicon carbide suspension wire 7, so that both ends thereof are fixed to the other magnet block attaching end two 20 and the magnet block attaching end one 19 diagonal thereto, respectively. The two silicon carbide suspension wires 7 are not completely tensioned at this time. And then the suspension wire adjusting knob 10 is rotated reversely to enable the two suspension wire adjusting sliding brackets 9 to be far away from the suspension wire fixing bracket 6 until the silicon carbide suspension wires are obviously tensioned and cannot be blown. Then, micro-droplets are generated by using a droplet generating device and are placed at the intersection of two silicon carbide suspension wires 7. Electrifying the nickel-chromium heating wire 3, stabilizing the temperature of the nickel-chromium heating wire 3 after one minute, and generating a high-temperature environment of about four hundred degrees at the position 3-4 mm above the nickel-chromium heating wire. At this time, the nickel-chromium heating wire 3 is far away from the liquid drop 8, and the liquid drop 8 is not influenced by the high-temperature environment generated by the nickel-chromium heating wire. Then the electromagnetic telescopic rod 1 is electrified, so that the position of the nickel-chromium heating wire 3 is rapidly moved until the middle part of the nickel-chromium heating wire 3 is positioned under the liquid drop 8. At this moment, the liquid drop 8 is heated, the liquid drop 8 is ignited after the heating is carried out for a short time, the electromagnetic telescopic rod 1 is powered off after the liquid drop 8 is burnt out, and the electromagnetic telescopic rod 1 returns. And finally, powering off the nickel-chromium heating wire 3, collecting combustion products, and finishing the experiment.