CN108894894B - Powder fluidizing device easy to fill - Google Patents
Powder fluidizing device easy to fill Download PDFInfo
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- CN108894894B CN108894894B CN201810566929.9A CN201810566929A CN108894894B CN 108894894 B CN108894894 B CN 108894894B CN 201810566929 A CN201810566929 A CN 201810566929A CN 108894894 B CN108894894 B CN 108894894B
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- powder
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- storage tank
- fluidizing
- funnel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/70—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using semi- solid or pulverulent propellants
Abstract
The invention provides an easy-to-fill powder fluidization device for fuel supply of a powder rocket engine and a method for filling and supplying fuel powder by using the device. Utilize the motor of being connected with the piston rod to draw the piston to the storage tank front end for hollow metal pipe and the front panel contact of connecting on the piston, lift off the piston rod from the piston (need not to lift off from transmission), stretch into hollow metal pipe and piston threaded connection with the funnel through-hole of front panel, add the powder in to the storage tank from the funnel, the powder gets into the storage tank from the through-hole of piston central axis. After the fuel is filled, the funnel is detached, the piston rod is screwed into the piston, the fuel filling is realized, the air source and the motor are opened, the fluidizing gas enters the storage tank through the hose to blow powder, the powder enters the fluidizing cavity in a gas-solid two-phase flow mode under the action of pneumatic drive and piston drive, and the powder enters the combustion chamber after being fluidized under the disturbance of lateral air inlet.
Description
Technical Field
The invention belongs to the field of fuel supply of powder rocket engines, and particularly relates to an easy-to-fill powder fluidizing device.
Background
The powder fluidizing device is one of the components of the whole system, adopts piston propulsion to match with high-speed airflow to send the powder in the storage tank into a combustion chamber for mixed combustion, and changes the flow rate by changing the propulsion speed of the piston and the airflow speed of the fluidizing gas so as to achieve the effect of thrust adjustment. 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 core technologies of an Al/AP powder rocket engine, and the premise of realizing continuous, stable and controllable supply of powder fuel and oxidant is that the engine works stably. 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.
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 prior fluidizing device has the characteristic of adjustable flow, but needs to fill fuel in the storage tank in advance, the sealing of the structure brings inconvenience to the refilling of the fuel, the connecting part of the fluidizing cavity and the storage tank needs to be disassembled for filling, and meanwhile, the prior device has unsatisfactory fluidizing effect and powder conveying efficiency. Therefore, optimization of the powder fluidization supply apparatus is essential.
Disclosure of Invention
The object of the present invention is to provide an easy-to-fill powder fluidization device to simplify the filling process in the powder storage tank, to achieve direct filling from the outside into the storage tank, without disassembling the connection part of the fluidization chamber and the storage tank and at the same time to improve the fluidization effect of the powder fuel.
The technical solution for realizing the purpose of the invention is as follows: a powder fluidizing device easy to fill comprises a storage tank, a piston, a front panel, a fluidizing cavity, a rear panel, first hoses, 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, the piston is arranged in the storage tank, the piston comprises a 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 through hole, the hollow metal pipe is fixedly connected with the piston and is butted with the 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 is provided with a front panel center hole and N front panel through holes, the number of the first hoses are N, each first hose penetrates through the front panel through hole, the osculum 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 rear panel fixed connection, the through-hole has been seted up to the rear panel.
Preferably, 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.
Preferably, each threaded hole is provided with a first pneumatic connector, and the first hose is connected with the first pneumatic connector.
Preferably, the front panel is connected to the tank by means of bolts, the tank is connected to the fluidization chamber by means of bolts, and the fluidization chamber is connected to the rear panel by means of bolts.
Preferably, said N is 2.
Preferably, the outer wall surface of the piston is sleeved with a rubber sleeve.
Preferably, the powder is aluminum powder.
Preferably, the inner wall of the tank is polished.
A method of charging and supplying fuel powder using a powder fluidising apparatus as described above, comprising the steps of:
(1) the piston is pulled to the front end of the storage tank through the piston rod by using the motor, and the piston rod is rotated to be screwed out of the hollow metal pipe;
(2) screwing the external thread section at the tail end of the long pipe of the funnel into the internal thread section in the hollow metal pipe to realize the threaded connection between the funnel and the piston;
(3) adding fuel powder into the storage tank through a funnel, wherein the powder enters the storage tank along a long pipe of the funnel through a hollow metal pipe to realize filling of the fuel powder;
(4) after the fuel powder is filled, the funnel is screwed off, and then the piston rod is screwed into the hollow metal pipe;
(5) and opening an air source connected with the first hose and the second hose and the motor, enabling fluidizing gas to enter the storage tank through the first hose to blow powder, enabling the piston to move towards the rear end of the storage tank under the driving of the motor, enabling the powder to enter the fluidizing cavity in a gas-solid two-phase flow mode under the dual actions of pneumatic driving and piston driving, enabling lateral air to enter the fluidizing cavity through the second hose, and enabling the powder to enter the combustion chamber through the through hole of the rear panel after being further fluidized under the disturbance of secondary air intake.
The invention has the following beneficial effects:
(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 view of the structure of the fluidizing device in the operating state.
FIG. 2 is a schematic view of the structure of the fluidized apparatus in a charged state.
Fig. 3 is a schematic structural view of a metal funnel.
Fig. 4 is a schematic view of the piston structure.
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. 1-4, an easy-to-fill powder fluidization device comprises a storage tank 10, a piston 15, a front panel 16, a fluidization chamber 11, a rear panel 17, a first hose 2, a hollow metal tube, a piston rod 1 and a funnel 13, wherein the front end of the storage tank 10 is fixedly connected with the front panel 16, the piston 15 is arranged in the storage tank 10, the piston 15 comprises a through hole 8 penetrating the piston 15 along the axial center line thereof and N threaded holes 9 with N number greater than or equal to 2 parallel to the through hole 8, the hollow metal tube is fixedly connected with the piston 15 and butted with the through hole 8, the interior of the hollow metal tube comprises a section of internal thread 5, one end of the piston rod 1 is connected with a motor, the other end of the piston rod is connected with the internal thread 5 of the hollow metal tube through an external thread in a matching manner, the front panel 16 is provided with a front panel center hole and N, first hose 2 is N, and every first hose 2 passes the front panel through-hole is connected to screw hole 9, a minor-opening end fixed connection long tube of funnel 13, the end of long tube includes an external screw thread section 14, external screw thread of external screw thread section 14 can with the cooperation of internal thread 5, the rear end fixed connection of 11 front ends in fluidization chamber and storage tank 10, 11 rear ends in fluidization chamber with back panel 17 fixed connection, the through-hole has been seted up to back panel 17.
Further, referring to fig. 1-2, a plurality of holes are opened on the cavity of the fluidization cavity 11, a second pneumatic connector is provided on the hole on the cavity of each fluidization cavity 11, and a second hose 12 is connected to the second pneumatic connector.
Furthermore, in conjunction with fig. 1 and 4, each threaded hole 9 is provided with a first pneumatic connector 7, and the first hose 2 is connected with the first pneumatic connector.
Further, the front panel 16 is connected to the tank 10 by bolts, the tank 10 is connected to the fluidization chamber 11 by bolts, and the fluidization chamber 11 is connected to the 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.
A method of charging and supplying fuel powder using a powder fluidising apparatus as described above, comprising the steps of:
(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 fuel powder into the tank 10 through a funnel 13, the powder entering the tank 10 through a hollow metal tube along the long tube of the funnel 13 to achieve filling of the fuel powder;
(4) after the fuel 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 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 (10)
1. The powder fluidizing device easy to fill is characterized by comprising a storage tank (10), a piston (15), a front panel (16), a fluidizing cavity (11), a rear panel (17), a first hose (2), a hollow metal pipe, a piston rod (1) and a funnel (13), wherein the front end of the storage tank (10) is fixedly connected with the front panel (16), the piston (15) is arranged in the storage tank (10), the piston (15) comprises a through hole (8) penetrating through the piston (15) along the axial center line of the piston and N threaded holes (9) parallel to the through hole (8), N is more than or equal to 2, the hollow metal pipe is fixedly connected with the piston (15) and butted with the through hole (8), a section of internal thread (5) is arranged in the hollow metal pipe, one end of the piston rod (1) is connected with a motor, and 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, front panel centre bore and a N front panel through-hole have been seted up to front panel (16), first hose (2) are N, and every first hose (2) pass the front panel through-hole is connected to screw hole (9), a minor-mouth end fixed connection long tube of funnel (13), the end of long tube includes an external screw thread section (14), the external screw thread of external screw thread section (14) can with internal thread (5) cooperation, the rear end fixed connection of fluidization chamber (11) front end and storage tank (10), fluidization chamber (11) rear end with rear panel (17) fixed connection, the through-hole has been seted up in rear panel (17).
2. Device for fluidizing powders easy to fill as in claim 1, characterized in that the cavity of the fluidizing chamber (11) is provided with a plurality of holes, and in that the holes of the cavity of each fluidizing chamber (11) are provided with a second pneumatic connection to which a second hose (12) is connected.
3. A powder fluidising device as claimed in claim 1 or 2 characterised in that a first pneumatic connection (7) is provided in each threaded hole (9) and the first hose (2) is connected to the first pneumatic connection.
4. Device for fluidizing easy-to-fill powder according to claim 1 or 2, characterized in that the front panel (16) is connected to the tank (10) by means of bolts, the tank (10) is connected to the fluidizing chamber (11) by means of bolts, and the fluidizing chamber (11) is connected to the rear panel (15) by means of bolts.
5. The easy-to-fill powder fluidization device of claim 1 or 2, wherein the N is 2.
6. Device for fluidizing powders which can be easily filled according to claim 1 or 2, characterized in that the outer wall of the piston (13) is sheathed with a rubber sleeve.
7. The easy-to-fill powder fluidization device of claim 1 or 2, wherein the powder is aluminum powder.
8. Device for fluidizing powders easy to fill according to claim 1 or 2, characterized in that the inner wall of the tank (10) is polished.
9. Easy-to-fill powder fluidising device according to claim 2 where the first (2) and second (12) hoses are PVC hoses.
10. A method of charging and feeding fuel powder using the powder fluidizing apparatus according to claim 2, characterized by comprising the steps of:
(1) a piston (15) is pulled to the front end of the storage tank (10) through a piston rod (1) by using a motor, and the piston rod (1) is rotated to be screwed out of the hollow metal pipe;
(2) screwing an external thread section (14) at the tail end of a long pipe of the funnel (13) into an internal thread section (5) in the hollow metal pipe to realize the threaded connection between the funnel (13) and the piston (15);
(3) adding fuel powder into the storage tank (10) through a funnel (13), wherein the powder enters the storage tank (10) along the long pipe of the funnel (13) through a hollow metal pipe to realize filling of the fuel powder;
(4) after the fuel powder is filled, the funnel (13) is screwed off, and then the piston rod (1) is screwed into the hollow metal tube;
(5) and (3) opening an air source connected with the first hose (2) and the second hose (12) and the motor, blowing powder into the storage tank (10) by fluidizing gas through the first hose (2) while moving the piston (15) to the rear end of the storage tank (10) under the driving of the motor, allowing the powder to enter the fluidizing chamber (11) in a gas-solid two-phase flow mode under the dual actions of pneumatic driving and piston driving, allowing lateral air to enter the fluidizing chamber (11) through the second hose (12), and allowing the powder to further fluidize and then enter the combustion chamber through the through hole of the rear panel (17) under the disturbance of secondary air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566929.9A CN108894894B (en) | 2018-06-05 | 2018-06-05 | Powder fluidizing device easy to fill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566929.9A CN108894894B (en) | 2018-06-05 | 2018-06-05 | Powder fluidizing device easy to fill |
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| Publication Number | Publication Date |
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| CN108894894A CN108894894A (en) | 2018-11-27 |
| CN108894894B true CN108894894B (en) | 2020-08-11 |
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| CN201810566929.9A Active CN108894894B (en) | 2018-06-05 | 2018-06-05 | Powder fluidizing device easy to fill |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894894B (en) * | 2018-06-05 | 2020-08-11 | 南京理工大学 | Powder fluidizing device easy to fill |
| CN109779743B (en) * | 2019-01-31 | 2020-05-26 | 西北工业大学 | Powder particle pneumatic filling method and system |
| CN109667742A (en) * | 2019-01-31 | 2019-04-23 | 西北工业大学 | A kind of powder storage tank inner piston sealing device |
| CN110318885B (en) * | 2019-07-11 | 2024-03-01 | 南昌航空大学 | Hydraulic drive type powder fuel conveying device |
| 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 |
| CN112922726B (en) * | 2021-02-08 | 2022-03-29 | 北京航空航天大学 | Powder supply device, metal powder ramjet and aircraft |
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| US4342428A (en) * | 1980-09-05 | 1982-08-03 | General Motors Corporation | Powdered coal delivery system |
| CN102951447A (en) * | 2012-11-09 | 2013-03-06 | 裕东（中山）机械工程有限公司 | Vertical powder conveying device |
| CN102951446A (en) * | 2012-11-09 | 2013-03-06 | 裕东（中山）机械工程有限公司 | Powder delivery device |
| CN102997268A (en) * | 2012-10-24 | 2013-03-27 | 西北工业大学 | Anti-tempering powder supply device |
| CN103662840A (en) * | 2013-12-06 | 2014-03-26 | 中山市君禾机电设备有限公司 | Device used for adding powder |
| CN108894894A (en) * | 2018-06-05 | 2018-11-27 | 南京理工大学 | A kind of powder fluidizer for being easy to load |
-
2018
- 2018-06-05 CN CN201810566929.9A patent/CN108894894B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4342428A (en) * | 1980-09-05 | 1982-08-03 | General Motors Corporation | Powdered coal delivery system |
| CN102997268A (en) * | 2012-10-24 | 2013-03-27 | 西北工业大学 | Anti-tempering powder supply device |
| CN102951447A (en) * | 2012-11-09 | 2013-03-06 | 裕东（中山）机械工程有限公司 | Vertical powder conveying device |
| CN102951446A (en) * | 2012-11-09 | 2013-03-06 | 裕东（中山）机械工程有限公司 | Powder delivery device |
| CN103662840A (en) * | 2013-12-06 | 2014-03-26 | 中山市君禾机电设备有限公司 | Device used for adding powder |
| CN108894894A (en) * | 2018-06-05 | 2018-11-27 | 南京理工大学 | A kind of powder fluidizer for being easy to load |
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