CN113464490A

CN113464490A - Mining axial fan wing type blade and machining die thereof

Info

Publication number: CN113464490A
Application number: CN202110878188.XA
Authority: CN
Inventors: 刘军; 史国平; 张义
Original assignee: Yanjing Equipment Manufacturing Co ltd
Current assignee: Yanjing Equipment Manufacturing Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-10-01

Abstract

The invention provides a mining axial flow fan airfoil type blade, comprising: a petiole; a blade disposed at a top of the petiole. The invention provides a mining axial flow fan airfoil blade, which is characterized in that the design of the cross section shape of the blade and the control of the twisting angle of the blade are realized, a metal mold is adopted, the casting is compactly crystallized through low-pressure pouring and pressure holding for a certain time control, the roughness and the dimensional precision of the surface are strictly controlled, and therefore the strength, the impact resistance and the service life of the blade are improved.

Description

Mining axial fan wing type blade and machining die thereof

Technical Field

The invention relates to the field of mining, in particular to a mining axial flow fan airfoil blade and a machining die thereof.

Background

In general, the blade and the blade handle are integrally cast, and the quality of a cast product is greatly influenced by a pattern adopted in the casting process. The patterns widely used at present mainly include wood patterns and metal patterns. The wood model has the advantages that:

light weight, low cost, easy processing and short production period. But the dimensional accuracy of the wood pattern is poor, the deformation is large in the pouring process due to the strength of the wood pattern, the quality of the formed wood pattern is affected, the service life of the wood pattern is short, and the wood pattern is easy to damage. The metal mould is made by casting, the surface roughness and the size precision of the cast blade surface can be strictly controlled, the metal mould can be repeatedly used, and the service life is long.

But the reason of the poor dimensional accuracy of wood pattern and intensity itself can make the deflection great in the pouring process, and in the blade casting process, the blade and petiole junction is thin uneven, can lead to the shrink of aluminium inhomogeneous, and then can influence the foundry goods quality of blade, even causes the hot crack defect of casting, leads to the unqualified of product quality. The metal mold is improved in dimensional accuracy and quality compared with a wood mold, but the requirements on the tensile strength and toughness of the blade of a large fan are high.

But the structural design and the strength of the cast fan aluminum alloy blade in the prior art are lower, and the elongation is lower.

Therefore, it is necessary to provide a mining axial flow fan airfoil blade and a machining die thereof to solve the technical problems.

Disclosure of Invention

The invention provides a mining axial flow fan airfoil blade and a processing die thereof, and solves the problems of low structural design and strength and low elongation of cast fan aluminum alloy blades in the prior art.

In order to solve the technical problem, the invention provides a wing-shaped blade of a mining axial flow fan, which comprises a blade handle;

a blade disposed at a top of the petiole.

The invention also provides a mining axial flow fan airfoil blade processing die, which comprises: the film pressing structure comprises a left die and a right die, the tops of the left die and the right die are provided with setting grooves, and one side of the left die and one side of the right die are provided with a cavity.

Preferably, the bottom of press mold structure is provided with the workstation, workstation top fixed mounting has fixed box.

Preferably, a sliding groove is formed in one side of the inner portion of the workbench, and a sliding rod is fixedly mounted on one side of the inner portion of the sliding groove.

Preferably, the outer surface of the slide bar is provided with a slide block.

Preferably, a first telescopic cylinder is arranged inside the fixed box, and a connecting block is fixedly mounted at one end of an output shaft of the first telescopic cylinder.

Preferably, a second telescopic cylinder is arranged in the middle of the inside of the fixing box, and one end of an output shaft of the second telescopic cylinder is fixedly connected with a cooling device.

Preferably, the cooling device comprises a push plate, and a cooling box is arranged on one side of the push plate.

Preferably, the middle of the workbench is provided with a falling groove, and the bottom of the workbench is provided with a collecting box.

Preferably, a control box is fixedly mounted on one side of the collecting box.

Preferably, a water tank is fixedly mounted on one side inside the fixing box, a water pipe is arranged inside the water tank, a circulating pump is arranged at the bottom of the surface of the water pipe, and a booster pump is arranged at the top of the surface of the water pipe.

Preferably, both sides of the inner wall of the side face of the fixed box are provided with a cavity, a rotating device is arranged in the cavity and comprises a rotating shaft.

Preferably, both ends of the outer surface of the rotating shaft are provided with coil springs, and the middle of the outer surface of the rotating shaft is provided with a winding column.

Preferably, a winding groove is formed in the middle of the winding column, and a connecting pipe is arranged on the surface of the winding groove.

Compared with the prior art, the airfoil-shaped blade of the mining axial flow fan has the following beneficial effects:

the invention provides a mining axial flow fan airfoil blade, which is characterized in that the design of the cross section shape of the blade and the control of the twisting angle of the blade are realized, a metal mold is adopted, the casting is compactly crystallized through low-pressure pouring and pressure holding for a certain time control, the roughness and the dimensional precision of the surface are strictly controlled, and therefore the strength, the impact resistance and the service life of the blade are improved.

Drawings

FIG. 1 is a schematic structural diagram of an airfoil blade of a mining axial flow fan provided by the invention;

FIG. 2 is a schematic view of the blade shown in FIG. 1 at a twisted angle;

FIG. 3 is a cross-sectional schematic view of the blade shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a mining axial flow fan airfoil blade machining die provided by the invention;

fig. 5 is a schematic structural view of a mining axial flow fan airfoil blade machining mold according to a second embodiment of the invention.

FIG. 6 is a schematic structural view of the cooling device shown in FIG. 5;

FIG. 7 is a schematic structural view of a mining axial flow fan airfoil blade machining mold according to a third embodiment of the invention;

FIG. 8 is a schematic side view of the mounting box of FIG. 7;

fig. 9 is a schematic structural view of the rotating device shown in fig. 7.

Reference numbers in the figures: 1. the device comprises a petiole, 2, blades, 3, a film pressing structure, 31, a left die, 32, a right die, 33, a cavity, 34, a setting groove, 4, a workbench, 5, a fixed box, 6, a first telescopic cylinder, 7, a connecting block, 8, a second telescopic cylinder, 9, a cooling device, 91, a push plate, 92, a cooling box, 10, a sliding groove, 11, a sliding rod, 12, a sliding block, 13, a dropping groove, 14, a collecting box, 15, a control box, 16, a water tank, 17, a water pipe, 18, a circulating pump, 19, a booster pump, 20, a rotating device, 21, a setting cavity, 201, a rotating shaft, 202, a coil spring, 203, a winding column, 204, a winding groove, 205 and a connecting pipe.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2 and fig. 3 in combination, wherein fig. 1 is a schematic structural view of an airfoil blade of a mining axial flow fan provided in the present invention; FIG. 2 is a schematic view of the blade shown in FIG. 1 at a twisted angle; FIG. 3 is a schematic cross-sectional view of the blade shown in FIG. 1. A mining axial fan airfoil blade, comprising: 1, a petiole;

and the blade 2 is arranged at the top of the blade handle 1.

The blades 2 are arranged on the upper parts of the blade handles 1 and connected into a whole; the blade 2 is divided into five equal sections to form six sections, each section rotates by different angles, and the sections are sequentially connected with each other to form the three-dimensional twisted blade 2.

The blade 2 is equally divided into five parts, six different sections are provided, the gravity center of each section is on the same vertical line, the sections rotate by different angles by taking the gravity center as the center, and the edges of the sections which are connected in sequence are smoothly and excessively formed into a twisted three-dimensional body, namely the required blade body.

The working principle of the airfoil blade of the mining axial flow fan provided by the invention is as follows:

when the blade 2 works, the blade 2 is driven to rotate by an external power supply, the section of the blade 2 from bottom to top is on the same vertical gravity center axis and the parallel intersection plane of the sections, the same rotating direction rotates by different angles, the gravity centers of all the sections are on the same vertical line, and the sections are smoothly connected to form the required structural shape and size of the blade 2.

the invention provides a mining axial flow fan airfoil blade, the design of the cross section shape of the blade 2 and the control of the twisting angle of the blade 2 adopt a metal mould, and the casting is compact in crystallization and the roughness and the dimensional accuracy of the surface are strictly controlled by low-pressure pouring and holding pressure for a certain time, so that the strength, the impact resistance and the service life of the blade are improved.

Please refer to fig. 4, wherein fig. 4 is a schematic structural diagram of a machining mold for an airfoil blade of a mining axial flow fan according to the present invention. A mining axial fan airfoil blade, comprising: press mold structure 3, press mold structure 3 includes left mould 31 and right mould 32, the top of left side mould 31 and right mould 32 all is provided with setting up groove 34, one side of left side mould 31 and right mould 32 is provided with die cavity 33.

The film pressing structure 3 is formed by casting gray iron and is formed by machining in a numerical control machining center, a casting mold of the blade is divided into a left mold half and a right mold half, the casting position is vertically placed, the petiole 1 is downward, the intersection is arranged at the end face of the petiole 1, and the riser is arranged at the top of the blade 2 and is a certain distance away.

The film pressing structure 3 is divided into a left die and a right die, the left die and the right die are arranged on a low-pressure casting machine and connected with die accessories, the die assembly and the die opening are free to move, the blade casting processing technology comprises low-pressure casting machine equipment and blade metal dies, molten metal is cast in a low-pressure state, after the casting is finished, a casting is kept under a certain pressure for a period of time, and after the molten metal is completely solidified, the casting is taken out from the casting machine and removed from the casting machine.

The method adopts a low-pressure pouring mode, molten metal is introduced into the cavity through the installation disc at the lower part of the blade handle, and a riser for exhausting and deslagging is arranged at the top of the cavity.

The casting equipment adopts a low-pressure casting machine to cast metal molds at low pressure, and the casting mode is low-pressure casting.

the casting process of the blade 2 comprises low-pressure casting machine equipment and a metal mold, molten metal is poured in a low-pressure state and is kept under pressure for a period of time, after pouring is finished, a casting is kept under certain pressure for a period of time, and after the molten metal is completely solidified, the casting is taken out of the casting machine and is demoulded.

Compared with the prior art, the machining die for the airfoil blade of the mining axial flow fan has the following beneficial effects:

the invention provides a mining axial flow fan airfoil blade processing die, wherein a die of a blade 2 is processed by a processing center, the surface roughness and the size precision of the blade are strictly controlled, the airfoil shape is more accurate, the torsion angle is more accurate, the mechanical property of the blade is improved through low-pressure casting forming, the accident caused by the fracture of the blade due to poor mechanical property of the blade in the operation process is avoided, the pneumatic property of a fan is improved, and the service life of the fan is prolonged.

Second embodiment

Referring to fig. 5 and fig. 6 in combination, based on the first embodiment of the present application, a mining axial flow fan airfoil blade machining mold is provided, and a second embodiment of the present application provides another mining axial flow fan airfoil blade machining mold. The second embodiment is only the preferred mode of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

Specifically, the utility model provides a mining axial fan airfoil blade mold processing's difference lies in, a mining axial fan airfoil blade mold processing, the bottom of press mold structure 3 is provided with

workstation

4, 4 top fixed mounting of workstation has fixed box 5.

A falling groove 13 is arranged in the middle of the working table 4, and the left side and the right side of the top of the working table 4 are provided with the fixing boxes 5.

A sliding groove 10 is formed in one side inside the workbench 4, and a sliding rod 11 is fixedly mounted on one side inside the sliding groove 10.

The slide grooves 10 are arranged at two sides inside the workbench 4, close to the middle dropping groove 13, and the length of the slide rod 11 at the bottom of the film pressing structure 3 is the moving length of the left die 31 and the right die 32.

The outer surface of the slide bar 11 is provided with a slide block 12.

The slide 12 extends upwardly from the slide channel 10 to the top surface of the table 4, the top surface of the table 4 being provided with a channel adapted for the slide 12 to slide.

The inside of fixed box 5 is provided with first telescoping cylinder 6, the one end fixed mounting of first telescoping cylinder 6 output shaft has connecting block 7.

The connecting block 7 is clamped in the setting groove 34, the output shaft of the first telescopic cylinder 6 drives the connecting block 7 to move left and right, and the left die 31 and the right die 32 are driven to move.

The middle of the inner part of the fixed box 5 is provided with a second telescopic cylinder 8, and one end of an output shaft of the second telescopic cylinder 8 is fixedly connected with a cooling device 9.

The cooling device 9 comprises a push plate 91, and a cooling box 92 is arranged on one side of the push plate 91.

The cooling box 92 is provided in plural number, and is fitted into a groove formed in the right side of the right die 32, and pipes are connected to each other, and the inside water can circulate each other.

A falling groove 13 is arranged in the middle of the working table 4, and a collecting box 14 is arranged at the bottom of the working table 4.

The drop slot 13 is sized to keep the blade 2 from dropping out of the middle.

A control box 15 is fixedly arranged on one side of the collecting box 14.

The pouring temperature setting of the molten metal, the temperature requirement required during the pouring of the metal mold, the temperature setting of the liquid feeding pipe of the pouring gate machine, the liquid feeding pressure setting, the mold filling pressure setting, the pressurization pressure setting, the holding pressure setting, the compensation pressure setting, the liquid feeding time setting, the mold filling time setting, the pressurization time setting and the holding pressure time setting are all controlled by the control box 15.

during operation, the second telescopic cylinder 8 is started through an external power supply, the output shaft is ejected out to push the push plate 91 into the groove on the right side of the right die 32, the cooling box 92 is embedded into the groove of the right die 32, and cold water in the cooling box 92 cools the film pressing structure, so that the blades 2 cast inside are cooled.

After the cooling is finished, the output shaft of the second telescopic cylinder 8 retracts into the cylinder body through the external power supply, meanwhile, the output shaft of the first telescopic cylinder 6 retracts into the cylinder body, the left die 31 and the right die 32 are driven to be separated, and a formed body in the cavity 33 falls into the collecting box 14 to be collected.

the invention provides a machining die for wing blades of a mining axial flow fan, wherein a cooling device 9 is driven to be embedded into a groove of a right die 32 through a second telescopic cylinder 8 during working, cold water in a cooling box 92 cools a film pressing structure 3, so that the internal temperature is quickly reduced, the traditional watering cooling is changed, the waste of water resources is reduced, and the cooling speed is increased.

Third embodiment

Referring to fig. 7, 8 and 9 in combination, based on the second embodiment of the present application, a mold for machining an airfoil blade of a mining axial flow fan is provided, and a third embodiment of the present application provides another mold for machining an airfoil blade of a mining axial flow fan. The third embodiment is only the preferable mode of the second embodiment, and the implementation of the third embodiment does not affect the implementation of the second embodiment alone.

Specifically, the utility model provides a mining axial fan airfoil blade mold processing's difference lies in, a mining axial fan airfoil blade mold processing, the inside one side fixed mounting of fixed box 5 has water tank 16, the inside of water tank 16 is provided with water pipe 17, the bottom on water pipe 17 surface is provided with circulating pump 18, the top on water pipe 17 surface is provided with booster pump 19.

The circulation pump 18 drives the water pipe 17 to reciprocate water inside the water tank 16, and the pressurizing pump 19 maintains pressure inside the water pipe 17 so that water can flow inside the water pipe 17.

Both sides of fixed box 5 side inner wall all are provided with and set up chamber 21, the inside that sets up chamber 21 is provided with rotating device 20, rotating device 20 includes axis of rotation 201.

Set up a vertical groove in the middle of fixed box 5 is close to that face of press mold structure 3, the inside of fixed box 5 is advanced in the intercommunication, erects the groove both sides and has all set up one and set up chamber 21, and two set up a chamber 21 left and right, form a set of, have set up two sets ofly, are located the top and the bottom of second telescoping cylinder 8.

The turning shaft 201 is disposed between the two disposition chambers 21, and the turning shaft 201 is rotatable.

Two ends of the outer surface of the rotating shaft 201 are provided with coil springs 202, and the middle of the outer surface of the rotating shaft 201 is provided with a winding column 203.

The rotation shaft 201 rotates to rotate the coil spring 202 and the winding post 203.

One end of the coil spring 202 is fixed to the top of the setting chamber 21, and the other end is fixedly connected to the rotating shaft 201.

The winding column 203 is provided with a winding groove 204 in the middle, and the surface of the winding groove 204 is provided with a connecting pipe 205.

One end of the connection pipe 205 is connected to the cooling tank 92, and the other end is connected to the water pipe 17.

When the coil spring 202 is not stretched by a force, the connecting pipe 205 is wound on the surface of the winding groove 204, and the push plate 91 is pushed out to drive the connecting pipe 205 to be pulled out, drive the rotating shaft 201 to rotate, and drive the coil spring 202 to rotate.

The pulling force of the coil spring 202 can drive the rotating shaft 201 to rotate reversely again, drive the winding column 203 to rotate reversely, and wind the connecting pipe 205 in the winding groove 204 again.

during operation, cold water and condensate are added into the cooling box 92, the output shaft of the second telescopic cylinder 8 attaches the cooling device 9 to the right die 32, and meanwhile the connecting pipe 205 is pulled to drive the winding column 203 and the rotating shaft 201 to rotate, and the coil spring 202 also rotates.

The circulation pump 18 is controlled by an external power supply to drive the water in the connecting pipe 205 to circulate back and forth, so as to keep the water in the cooling tank 92 to circulate.

The withdrawal of the output shaft of the second telescopic cylinder 8 drives the push plate 91 to withdraw, and under the restoring elasticity of the coil spring 202, the rotating shaft 201 is driven to rotate reversely, so that the winding column 203 rotates to wind the connecting pipe 205 in the winding groove 204 from the new position.

the invention provides a mining axial flow fan airfoil blade processing die, which is characterized in that a cooling box 92 is arranged in a fixed box 5, and a circulating pump 18 and a booster pump 19 are connected with a water pipe 17, so that water in a water tank 16 can be recycled, the cooling effect of a cooling device 9 is enhanced, and the cooling working time is prolonged.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A mining axial fan airfoil blade, characterized by includes: a petiole;

a blade disposed at a top of the petiole.

2. The mining axial flow fan airfoil blade machining die of claim 1, comprising:

the film pressing structure comprises a left die and a right die, the tops of the left die and the right die are provided with setting grooves, and one side of the left die and one side of the right die are provided with a cavity.

3. The mining axial flow fan airfoil blade machining die of claim 2, wherein a workbench is arranged at the bottom of the film pressing structure, and a fixing box is fixedly mounted at the top of the workbench.

4. The mining axial flow fan airfoil blade machining die of claim 3, wherein a sliding groove is formed in one side of the inside of the workbench, and a sliding rod is fixedly mounted on one side of the inside of the sliding groove.

5. The mining axial flow fan airfoil blade machining die of claim 4, wherein a sliding block is arranged on the outer surface of the sliding rod.

6. The mining axial flow fan airfoil blade machining die of claim 3, wherein a first telescopic cylinder is arranged inside the fixing box, and a connecting block is fixedly mounted at one end of an output shaft of the first telescopic cylinder.

7. The mining axial flow fan airfoil blade machining die of claim 3, wherein a second telescopic cylinder is arranged in the middle of the inside of the fixing box, and one end of an output shaft of the second telescopic cylinder is fixedly connected with a cooling device.

8. The mining axial flow fan airfoil blade machining die of claim 7, wherein the temperature reduction device comprises a push plate, and a cooling box is arranged on one side of the push plate.

9. The mining axial flow fan airfoil blade machining die of claim 3, wherein a drop groove is formed in the middle of the workbench, and a collection box is arranged at the bottom of the workbench.

10. The mining axial flow fan airfoil blade machining die of claim 9, wherein a control box is fixedly mounted on one side of the collection box.