CN109057953B - Powder engine with adjustable flame holder position and mounting method of flame holder of powder engine - Google Patents
Powder engine with adjustable flame holder position and mounting method of flame holder of powder engine Download PDFInfo
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- CN109057953B CN109057953B CN201810763204.9A CN201810763204A CN109057953B CN 109057953 B CN109057953 B CN 109057953B CN 201810763204 A CN201810763204 A CN 201810763204A CN 109057953 B CN109057953 B CN 109057953B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B45/00—Engines characterised by operating on non-liquid fuels other than gas; Plants including such engines
- F02B45/02—Engines characterised by operating on non-liquid fuels other than gas; Plants including such engines operating on powdered fuel, e.g. powdered coal
- F02B45/04—Plants, e.g. having coal-grinding apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention provides a powder engine with an adjustable flame holder position and a method for installing the flame holder of the powder engine, wherein the powder engine comprises a powder fuel supply device, a powder oxidant supply device, a combustion chamber 36 and a spray pipe 34, the powder fuel supply device, the powder oxidant supply device and the combustion chamber 36 are respectively connected with the front end of the combustion chamber 36 through pipelines, the rear end of the combustion chamber 36 is connected with the spray pipe 34, a flame holder 29 is arranged in the combustion chamber 36, and the axial position of the flame holder 29 in the combustion chamber 36 can be adjusted. The position of the flame holder is adjustable, the axial position of the flame holder can be adjusted according to the requirements of different operating conditions of the engine, so that fuel can be more fully combusted, and the detachable fixing device of the flame holder has a simple structure and is practical and convenient to adjust.
Description
Technical Field
The invention belongs to the technical field of powder rocket engines, and particularly relates to a powder engine with an adjustable flame holder and a mounting method of the flame holder.
Background
The powder engine comprises a fuel fluidization supply section and a fuel combustion section, the powder in a storage tank is fed into a combustion chamber by adopting piston propulsion and high-speed airflow, the powder is stably combusted under the turbulent flow effect of a flame stabilizer, and the flow is changed by changing the propulsion speed of the piston and the airflow speed of fluidized gas, so that the effect of adjustable thrust is achieved. The Al/AP powder rocket engine can work in vacuum due to the characteristic that the engine can carry oxidant and fuel, and has good application prospect in the field of aerospace.
The powder supply technology is one of the key technologies of the Al/AP powder rocket engine, and the premise of realizing the continuous, stable and controllable supply of the powder fuel and the oxidant is the stable work of the engine. The main idea of the powder supply technology is to fluidize the powder in the storage tank, realize the continuous and stable supply of the fuel by matching with the propulsion of the piston while carrying out pneumatic transmission, and finally spray the fuel into the combustion chamber in the form of gas-solid two-phase flow.
One of the keys of the successful work of the Al/AP powder rocket engine with the stable combustion chamber of the flame is that the thrust can be adjusted only after the engine is smoothly ignited and the fuel is stably combusted. The location of the flame holder affects the location of the region of gas flow recirculation within the combustion chamber, and has a significant effect on the effectiveness of flame holding.
The orifice dragon flying of national defense science and technology university adds a turbulence cone at a fluidization spray pipe of a powder fuel supply device of a powder fuel ramjet engine, and carries out calculation and analysis on the concentration of discrete phase particles in a convection field in different configurations and positions of the turbulence cone, and the orifice dragon flying is a reference (numerical simulation research of the turbulence cone added in the powder fuel supply device, rocket propulsion, 2 nd stage 2012); the congratulation of harbourine university of engineering has invented a pre-packed powder fuel supply (patent No. CN102644932A) that uses a motor to drive a piston, utilizes high temperature gas to cut the charge and to single fluidize the metal powder. The existing fluidizing device of the powder engine realizes adjustable thrust, but needs to fill fuel in the storage tank in advance, the sealing of the structure brings inconvenience to the refilling of the fuel, and the connecting part of the fluidizing chamber and the storage tank needs to be disassembled for filling, so the optimization of the fluidizing powder supply device of the powder engine is necessary. In order to improve the combustion efficiency of fuel powder in an engine, a flame stabilizer (flame stabilizer) needs to be installed in a combustion chamber, the flame stabilizer of the conventional device is welded at a fixed position on a screw rod, the position of the stabilizer cannot be freely adjusted, and in order to meet the requirements under different working conditions, a large amount of materials need to be consumed to weld the flame stabilizer at different positions on the screw rod, so that a large amount of materials are consumed.
Disclosure of Invention
The invention aims to provide a powder engine with an easily adjustable flame holder position and an installation method of the flame holder of the powder engine to realize flexible and efficient powder filling and adjustable flame holder position.
The technical solution for realizing the purpose of the invention is as follows: the utility model provides a powder engine of steady flame ware position adjustable, the engine includes powdered fuel feeding device, powdered oxidant feeding device, combustion chamber and spray tube, powdered fuel feeding device and powdered oxidant feeding device are connected with the front end of combustion chamber through pipeline and combustion chamber respectively, the rear end and the spray tube of combustion chamber are connected, be provided with the flame holder in the combustion chamber, just the flame holder is in axial position is adjustable in the combustion chamber.
Furthermore, M (M is more than or equal to 2) metal slide rails symmetrically arranged along the central axis of the combustion chamber are fixed in the combustion chamber, the flame stabilizer is fixed with the metal slide rails through a detachable fixing device, and the central axis of the flame stabilizer is overlapped with the central axis of the combustion chamber.
Furthermore, the combustion chamber comprises a combustion chamber front panel, the combustion chamber front panel is connected with the combustion chamber front end face through bolts, a metal ring gasket is arranged between the combustion chamber front panel and the combustion chamber front end face, M through holes are formed in the metal ring gasket, the front ends of the M metal slide rails are matched and fixed with the M through holes in the metal ring gasket, a metal ring is fixed inside the tail end of the combustion chamber, the outer ring surface of the metal ring is attached and fixed with the inner wall of the combustion chamber, M through holes are formed in the metal ring, and the tail ends of the M metal slide rails are matched and fixed with the M through holes in the metal ring.
Further, detachable fixing device includes that M covers establishes opening becket on the metal slide rail, and an opening becket is established to the cover on every metal slide rail, opening becket is fixed in central ring through the connecting piece, flame holder's bottom intermediate position has an internal thread blind hole, flame holder through one pass central ring the centre bore with flame holder's internal thread blind hole screw-thread fit's bolt and central ring fixed connection, opening becket's opening part is provided with two sheetmetals that transversely extend from two opening terminal surfaces, two all have the through-hole on the sheetmetal, through passing the bolt and nut subassembly of the through-hole of sheetmetal can realize opening becket clamp and loose on the metal slide rail.
Furthermore, the ignition head extends into the combustion chamber through a through hole of a hollow metal pipe penetrating through the wall surface of the combustion chamber, and the ignition head is positioned between the metal sliding rails.
Further, the ignition head is a high-energy spark plug.
Further, M is 2-4.
Further, the powder fuel supply device comprises a storage tank, a piston, a front panel of the powder fuel supply device, a fluidization cavity, a rear panel of the powder fuel supply device, a first hose, a hollow metal pipe, a piston rod and a funnel, wherein the front end of the storage tank is fixedly connected with the front panel of the powder fuel supply device, the piston is arranged in the storage tank, the piston comprises a piston through hole penetrating through the piston along the axial center line of the piston and N (N is more than or equal to 2) threaded holes arranged in parallel with the piston through hole, the hollow metal pipe is fixedly connected with the piston and is butted with the piston through hole, a section of internal thread is arranged in the hollow metal pipe, one end of the piston rod is connected with a motor, the other end of the piston rod is matched and connected with the internal thread of the hollow metal pipe through an external thread, the front panel of the powder fuel supply device is provided, first hose is N, and every first hose passes the front panel through-hole is connected to the screw hole, a minor-opening end fixed connection long tube of funnel, the end of long tube includes an external screw thread section, the external screw thread of external screw thread section can with interior screw-thread fit, the rear end fixed connection of fluidization chamber front end and storage tank, fluidization chamber rear end with powder fuel feeding device rear panel fixed connection, the through-hole has been seted up to powder fuel feeding device rear panel, powder oxidant feeding device's structure is the same with powder fuel feeding device.
Furthermore, a plurality of holes are formed in the cavity of the fluidization cavity, a second pneumatic connector is arranged on each hole in the cavity of the fluidization cavity, and a second hose is connected with the second pneumatic connector.
A method of installing a flame holder for a powder engine as described above, comprising the steps of:
(1) extending the tail end of the metal sliding rail into the through hole of the metal ring to connect the metal ring with the metal sliding rail;
(2) aligning a threaded blind hole at the bottom of the flame stabilizer with a through hole of the central ring, screwing in the threaded blind hole by using a bolt matched with the threaded blind hole, and fixing the flame stabilizer on the central ring;
(3) sleeving the open metal ring into the metal slide rail and moving to enable the flame stabilizer connected with the metal ring to move to a position required by an experimental working condition, and screwing a nut after a bolt penetrates through a through hole in the metal sheet of the metal ring so as to fasten the metal ring on the metal slide rail;
(4) the method comprises the following steps that a metal sliding rail fixed with a flame stabilizer extends into a combustion chamber from an opening at the rear end of the combustion chamber, a metal ring enters and is tightly attached to the inner wall of the combustion chamber, the hollow metal pipe and the metal sliding rail are staggered, and a front panel of the combustion chamber and the front end surface of the combustion chamber are fixedly connected after a through hole in a metal ring gasket is matched and installed with the front end of the metal sliding rail;
(5) after the engine works, the front panel of the combustion chamber is detached, the flame stabilizer and the metal slide rail are taken out, the bolt on the metal sheet is unscrewed, the flame stabilizer can slide, is adjusted to the position under another working condition and is screwed, and then is installed in the combustion chamber again according to the steps.
The invention has the following beneficial effects:
(1) the position of the flame holder is adjustable, the axial position of the flame holder can be adjusted according to the requirements of different operating conditions of the engine, so that more sufficient combustion of fuel can be realized, and the detachable fixing device of the flame holder has a simple structure and is practical and very convenient to adjust;
(1) when the powder fuel in the storage tank is used up, the piston rod can be detached, the metal funnel is butted with the hollow metal pipe on the piston, the powder is directly added into the storage tank, and the connecting part of the fluidization cavity and the storage tank is not required to be detached;
(2) the powder is provided with a fluidization cavity after leaving the storage tank, and the fluidization effect of the powder is improved under the secondary disturbance of the side air inlet.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of a powder engine with adjustable flame holders according to the present invention.
FIG. 2 is a schematic view of the structure of the combustor and nozzle portion of the present invention.
Fig. 3 is a schematic view of the structure and installation of the metal slide rail of the present invention.
FIG. 4 is a schematic view of the construction and installation of the removable fixture and flame holder of the present invention.
Fig. 5 is a schematic view showing the operation of the pulverized fuel supply apparatus and the pulverized oxidizer supply apparatus according to the present invention.
FIG. 6 is a schematic view showing the filling state of the pulverized fuel feeder and the pulverized oxidizing agent feeder according to the present invention.
Fig. 7 is a schematic structural view of the metal funnel of the present invention.
Fig. 8 is a schematic view of the structure of the piston of the present invention.
Detailed Description
In order to better understand the technical content of the invention, specific embodiments are specifically illustrated in the following description in conjunction with the accompanying drawings.
Referring to fig. 1, the powder engine with the adjustable flame holder position comprises a powder fuel supply device, a powder oxidant supply device, a combustion chamber 36 and a nozzle 34, wherein the powder fuel supply device and the powder oxidant supply device are respectively connected with the combustion chamber 36 through a pipeline 39 and the front end of the combustion chamber 36, the rear end of the combustion chamber 36 is connected with the nozzle 34, a flame stabilizer 29 is arranged in the combustion chamber 36, and the axial position of the flame stabilizer 29 in the combustion chamber 36 is adjustable.
Furthermore, M metal slide rails 20 with M being more than or equal to 2 are symmetrically arranged along the central axis of the combustion chamber 36 and are fixed in the combustion chamber 36, the flame stabilizer 29 is fixed with the metal slide rails 20 through a detachable fixing device, and the central axis of the flame stabilizer 29 is overlapped with the central axis of the combustion chamber 36.
Further, with reference to fig. 2, the combustion chamber 36 includes a combustion chamber front panel 35, the combustion chamber front panel 35 is connected with the combustion chamber front end face through a bolt, a metal ring gasket 19 is disposed between the combustion chamber front panel 35 and the combustion chamber front end face, M through holes are formed in the metal ring gasket 19, the front ends of the M metal slide rails 20 are fixed to the M through holes in the metal ring gasket 19 in a matching manner, a metal ring 33 is fixed to the inside of the tail end of the combustion chamber 36, the outer ring surface of the metal ring 33 is fixed to the inner wall of the combustion chamber 36 in an attaching manner, M through holes 31 are formed in the metal ring 33, and the tail ends of the M metal slide rails 20 are fixed to the M through holes 31 in the metal ring 33 in a matching manner.
Further, referring to fig. 3-4, the detachable fixing device includes M open metal rings 24 sleeved on the metal slide rails 20, one open metal ring 24 is sleeved on each metal slide rail 20, the open metal ring 24 is fixed to the central ring 30 by a connecting piece 27, the flame holder 29 has an internally threaded blind hole 26 at the bottom middle position, the flame holder 29 is fixedly connected to the central ring 30 by means of a bolt which passes through the central hole 28 of the central ring 30 and is in threaded engagement with the blind internally threaded hole 26 of the flame holder 29, the opening part of the opening metal ring 24 is provided with two metal sheets 25 transversely extending from two opening end faces, the two metal sheets 25 are provided with through holes, the clamping and loosening of the split metal ring 24 on the metal slide 20 is achieved by a bolt and nut assembly passing through the through holes of the metal sheet 25.
Further, the ignition head 23 extends into the combustion chamber 36 through the through hole 22 of the hollow metal tube 21 penetrating through the wall surface of the combustion chamber 36, and the ignition head 23 is positioned between the metal slide rails 20.
Further, the ignition head 23 is a high-energy spark plug.
Further, M is 2 to 4, preferably 2.
Further, the inner wall surface of the opening metal ring 24 needs to be frosted, and the inner wall surface of the joint between the front end and the tail end of the metal slide rail 20 and the metal ring gasket 19 and the metal ring 33 needs to be frosted to ensure the attachment.
Further, referring to fig. 5-7, the pulverized fuel supply device includes a storage tank 10, a piston 15, a front panel 16 of the pulverized fuel supply device, a fluidization chamber 11, a rear panel 17 of the pulverized fuel supply device, a first hose 2, a hollow metal tube, a piston rod 1 and a funnel 13, the front end of the storage tank 10 is fixedly connected with the front panel 16 of the pulverized fuel supply device, the piston 15 is disposed in the storage tank 10, the piston 15 includes a piston through hole 8 penetrating the piston 15 along an axial center line thereof and N (N is greater than or equal to 2) threaded holes 9 disposed in parallel with the piston through hole 8, the hollow metal tube is fixedly connected with the piston 15 and is abutted against the piston through hole 8, the interior of the hollow metal tube includes a section of internal thread 5, one end of the piston rod 1 is connected with a motor, and the other end is connected with the internal thread 5 of the hollow metal tube through an external thread, the front panel 16 of the powdered fuel supply device is provided with a front panel central hole and N front panel through holes, the number of the first hoses 2 is N, each first hose 2 penetrates through the front panel through hole to be connected to the threaded hole 9, a small-end fixed connection long pipe of the funnel 13 is provided, the tail end of the long pipe comprises an external thread section 14, external threads of the external thread section 14 can be matched with the internal threads 5, the front end of the fluidization cavity 11 is fixedly connected with the rear end of the storage tank 10, the rear end of the fluidization cavity 11 is fixedly connected with the rear panel 17 of the powdered fuel supply device, the rear panel 17 of the powdered fuel supply device is provided with a through hole 18, and the structure of the powdered oxidant supply device is the same as that of the powdered fuel supply device.
Furthermore, a plurality of holes are formed in the cavity of the fluidization cavity 11, a second pneumatic connector is arranged in each hole in the cavity of the fluidization cavity 11, and a second hose 12 is connected with the second pneumatic connector.
Further, referring to fig. 5 and 8, a first pneumatic connector 7 is arranged on each threaded hole 9, and the first hose 2 is connected with the first pneumatic connector.
Further, the pulverized fuel feeder front panel 16 is connected to the storage tank 10 by bolts, the storage tank 10 is connected to the fluidizing chamber 11 by bolts, and the fluidizing chamber 11 is connected to the pulverized fuel feeder rear panel 15 by bolts.
Further, N is 2.
Further, the outer wall surface of the piston 13 is sleeved with a rubber sleeve to ensure the air tightness.
Further, the powder is aluminum powder.
Further, the inner wall of the storage tank 10 is subjected to a polishing process.
Further, the length of the hollow metal pipe is one fifth of the length of the powder storage tank 10, the internal thread section 5 is cut to the piston side from the starting point at the middle point of the hollow metal pipe, and the cutting length is one third of the hollow metal pipe. And cutting external thread sections matched with the internal thread sections 5 at the tail ends of the piston rod 1 and the metal funnel 13, wherein the cutting lengths are the same.
The first and second hoses are PVC hoses.
The method for filling and supplying fuel powder or oxidant powder by the powder fluidizing device comprises the following steps:
(1) the piston 15 is pulled to the front end of the storage tank 10 through the piston rod 1 by using a motor, and the piston rod 1 is rotated to be screwed out of the hollow metal pipe (the part of the piston rod 1 connected with the motor rotates along with the piston rod 1);
(2) screwing the external thread section 14 at the tail end of the long pipe of the funnel 13 into the internal thread section 5 in the hollow metal pipe to realize the threaded connection between the funnel 13 and the piston 15;
(3) adding powder into the storage tank 10 through a funnel 13, wherein the powder enters the storage tank 10 along a long pipe of the funnel 13 through a hollow metal pipe to realize the filling of the powder;
(4) after the powder is filled, the funnel 13 is screwed off, and then the piston rod 1 is screwed into the hollow metal tube;
(5) the air source connected with the first hose 2 and the second hose 12 and the motor are opened, the fluidizing gas enters the storage tank 10 through the first hose 2 to blow powder, the piston 15 moves towards the rear end of the storage tank 10 under the driving of the motor, the powder enters the fluidizing chamber 11 in a gas-solid two-phase flow mode under the double actions of pneumatic driving and piston driving, the lateral air enters the fluidizing chamber 11 through the second hose 12, and the powder enters the combustion chamber through the through hole of the rear panel 17 after being further fluidized under the disturbance of the secondary air inlet.
The invention relates to a method for installing a flame stabilizer of a powder engine, which comprises the following steps:
(1) extending the tail end of the metal slide rail 20 into the through hole 31 of the metal ring 33, so that the metal ring 33 is connected with the metal slide rail 20;
(2) aligning the threaded blind hole 26 at the bottom of the flame stabilizer 29 with the through hole 28 of the central ring 30, screwing in by using a bolt matched with the threaded blind hole 26, and fixing the flame stabilizer 29 on the central ring 30;
(3) sleeving the open metal ring 24 into the metal slide rail 20 and moving to enable the flame stabilizer 29 connected with the metal ring 24 to move to a position required by an experimental working condition, and screwing a nut after a bolt penetrates through a through hole in the metal sheet 25 of the metal ring 24 so as to fasten the metal ring 24 on the metal slide rail 20;
(4) the metal slide rail 20 fixed with the flame stabilizer 29 extends into the combustion chamber 36 from the opening at the rear end of the combustion chamber, so that the metal ring 33 enters and clings to the inner wall of the combustion chamber 36, the hollow metal tube 21 and the metal slide rail 20 are staggered, and the through hole on the metal ring gasket 19 is matched with the front end of the metal slide rail 20 to be installed, and then the front panel 35 of the combustion chamber is connected and fixed with the front end surface of the combustion chamber;
(5) after the engine is finished, the front panel 35 of the combustion chamber is detached, the flame stabilizer 29 and the metal slide rail 20 are taken out, the bolt on the metal sheet 25 is loosened, so that the flame stabilizer 29 can slide, the position under another working condition is adjusted to be screwed, and the flame stabilizer is installed in the combustion chamber 36 again according to the steps.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A powder engine with an adjustable flame holder position comprises a powder fuel supply device, a powder oxidant supply device, a combustion chamber (36) and a spray pipe (34), wherein the powder fuel supply device, the powder oxidant supply device, the combustion chamber (36) and the powder fuel supply device are respectively connected with the front end of the combustion chamber (36) through pipelines, the rear end of the combustion chamber (36) is connected with the spray pipe (34), the powder engine is characterized in that a flame stabilizer (29) is arranged in the combustion chamber (36), the axial position of the flame stabilizer (29) in the combustion chamber (36) is adjustable, the powder fuel supply device comprises a storage tank (10), a piston (15), a powder fuel supply device front panel (16), a fluidization cavity (11), a powder fuel supply device rear panel (17), a first hose (2), a hollow metal pipe, a piston rod (1) and a funnel (13), the front end of the storage tank (10) is fixedly connected with a front panel (16) of a powder fuel supply device, the piston (15) is arranged in the storage tank (10), the piston (15) comprises a piston through hole (8) penetrating through the piston (15) along the axial center line of the piston and N threaded holes (9) arranged in parallel with the piston through hole (8), the hollow metal pipe is fixedly connected with the piston (15) and butted with the piston through hole (8), the inside of the hollow metal pipe comprises one section of internal thread (5), one end of the piston rod (1) is connected with the motor, the other end of the piston rod is matched and connected with the internal thread (5) of the hollow metal pipe through an external thread, the front panel (16) of the powder fuel supply device is provided with a front panel center hole and N front panel through holes, the number of the first hoses (2) are N, each first hose (2) penetrates through the front panel through hole to be connected to the threaded hole (9), the small-mouth end fixed connection long pipe of funnel (13), the end of long pipe includes an external screw thread section (14), the external screw thread of external screw thread section (14) can with internal thread (5) cooperation, fluidization chamber (11) front end and the rear end fixed connection of storage tank (10), fluidization chamber (11) rear end with powder fuel feeding device rear panel (17) fixed connection, through-hole (18) have been seted up in powder fuel feeding device rear panel (17), powder oxidant feeding device's structure is the same with powder fuel feeding device, and N is greater than or equal to 2.
2. The powder engine as claimed in claim 1, wherein M metal slide rails (20) symmetrically arranged along the central axis of the combustion chamber (36) are fixed in the combustion chamber (36), the flame stabilizer (29) is fixed with the metal slide rails (20) through a detachable fixing device, the central axis of the flame stabilizer (29) is coincident with the central axis of the combustion chamber (36), and M is more than or equal to 2.
3. The powder engine as claimed in claim 2, characterized in that the combustion chamber (36) comprises a combustion chamber front panel (35), the combustion chamber front panel (35) is connected with the front end surface of the combustion chamber through bolts, a metal ring gasket (19) is arranged between the combustion chamber front panel (35) and the front end surface of the combustion chamber, m through holes are arranged on the metal circular gasket (19), the front ends of the M metal slide rails (20) are matched and fixed with the M through holes on the metal circular gasket (19), a metal ring (33) is fixed in the tail end of the combustion chamber (36), the outer ring surface of the metal ring (33) is fixedly attached to the inner wall of the combustion chamber (36), m through holes (31) are formed in the metal ring (33), and the tail ends of the M metal sliding rails (20) are matched and fixed with the M through holes (31) in the metal ring (33).
4. The powder engine as claimed in claim 3, wherein the detachable fixing device comprises M open metal rings (24) fitted on the metal slide rails (20), one open metal ring (24) is fitted on each metal slide rail (20), the open metal ring (24) is fixed to the central ring (30) through a connecting member (27), the flame holder (29) has a blind hole (26) with internal thread at the bottom middle position, the flame holder (29) is fixedly connected to the central ring (30) through a bolt passing through the central hole (28) of the central ring (30) and the blind hole (26) with internal thread of the flame holder (29), the open part of the open metal ring (24) is provided with two metal sheets (25) extending transversely from two open end faces, and both metal sheets (25) have through holes, the clamping and loosening of the split metal ring (24) on the metal sliding rail (20) can be realized by a bolt-nut assembly passing through the through hole of the metal sheet (25).
5. Powder engine according to claim 4, characterized in that the ignition head (23) protrudes into the combustion chamber (36) through a through hole (22) of a hollow metal tube (21) passing through the wall of the combustion chamber (36), the ignition head (23) being located between the metal rails (20).
6. The powder engine as claimed in claim 5, characterized in that the ignition head (23) is a high-energy spark plug.
7. The powder engine as defined in any one of claims 2-6, wherein M is 2-4.
8. Powder engine according to claim 1, characterized in that the cavity of the fluidization chamber (11) is provided with a plurality of holes, and in that the holes of the cavity of each fluidization chamber (11) are provided with a second pneumatic connection, to which a second hose (12) is connected.
9. A method of installing a flame holder for a powder engine as recited in claim 5, comprising the steps of:
(1) the tail end of the metal sliding rail (20) extends into the through hole (31) of the metal ring (33), so that the metal ring (33) is connected with the metal sliding rail (20);
(2) aligning a threaded blind hole (26) at the bottom of the flame stabilizer (29) with a through hole (28) of a central ring (30), screwing in by using a bolt matched with the threaded blind hole (26), and fixing the flame stabilizer (29) on the central ring (30);
(3) sleeving the open metal ring (24) into the metal slide rail (20) and moving to enable the flame stabilizer (29) connected with the metal ring (24) to move to a position required by an experimental working condition, and screwing a nut after a bolt penetrates through a through hole in a metal sheet (25) of the metal ring (24) so as to fasten the metal ring (24) on the metal slide rail (20);
(4) the method comprises the following steps that a metal sliding rail (20) fixed with a flame stabilizer (29) extends into a combustion chamber (36) from an opening at the rear end of the combustion chamber, a metal ring (33) enters and is tightly attached to the inner wall of the combustion chamber (36), the hollow metal pipe (21) and the metal sliding rail (20) are staggered in position, a through hole in a metal ring gasket (19) is matched with the front end of the metal sliding rail (20) to be installed, and then a front panel (35) of the combustion chamber is connected and fixed with the front end face of the combustion chamber;
(5) after the engine works, the front panel (35) of the combustion chamber is detached, the flame stabilizer (29) and the metal slide rail (20) are taken out, the bolt on the metal sheet (25) is loosened, so that the flame stabilizer (29) can slide, the position under another working condition is adjusted to be screwed, and the flame stabilizer is installed in the combustion chamber (36) again according to the steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763204.9A CN109057953B (en) | 2018-07-12 | 2018-07-12 | Powder engine with adjustable flame holder position and mounting method of flame holder of powder engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763204.9A CN109057953B (en) | 2018-07-12 | 2018-07-12 | Powder engine with adjustable flame holder position and mounting method of flame holder of powder engine |
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| CN109779743B (en) * | 2019-01-31 | 2020-05-26 | 西北工业大学 | Powder particle pneumatic filling method and system |
| CN110260361A (en) * | 2019-07-11 | 2019-09-20 | 南昌航空大学 | It is a kind of using metal powder as the after-burner of fuel |
| CN110631051A (en) * | 2019-10-28 | 2019-12-31 | 湖南云顶智能科技有限公司 | Powder fluidization powder supply device |
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