CN108361125B - Rotary pipe type multitube pulse detonation engine - Google Patents
Rotary pipe type multitube pulse detonation engine Download PDFInfo
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- CN108361125B CN108361125B CN201810212794.6A CN201810212794A CN108361125B CN 108361125 B CN108361125 B CN 108361125B CN 201810212794 A CN201810212794 A CN 201810212794A CN 108361125 B CN108361125 B CN 108361125B
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- 238000005474 detonation Methods 0.000 title claims abstract description 288
- 238000002347 injection Methods 0.000 claims description 79
- 239000007924 injection Substances 0.000 claims description 79
- 238000007789 sealing Methods 0.000 claims description 14
- 239000002360 explosive Substances 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 244000126211 Hericium coralloides Species 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 69
- 238000000034 method Methods 0.000 description 26
- 230000008569 process Effects 0.000 description 26
- 230000017525 heat dissipation Effects 0.000 description 12
- 238000004880 explosion Methods 0.000 description 9
- 230000002000 scavenging effect Effects 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 206010003591 Ataxia Diseases 0.000 description 2
- 206010010947 Coordination abnormal Diseases 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 208000016290 incoordination Diseases 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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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
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
- F02K7/02—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet
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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
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
- F02K7/02—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet
- F02K7/06—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet with combustion chambers having valves
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention relates to the technical field of pulse detonation engines, in particular to a rotary tube type multitube pulse detonation engine, which comprises a driving motor, a detonation engine main shaft and at least two detonation tubes, wherein the detonation engine main shaft is coaxially and fixedly connected with an output shaft of the driving motor, the axis of each detonation tube is parallel to the axis of the detonation engine main shaft, the rotary tube type multitube pulse detonation engine also comprises a first detonation tube connecting disc used for connecting the detonation tubes, the first detonation tube connecting disc is vertically and penetratingly provided with a first round hole matched with the diameter of each detonation tube opposite to the axis of each detonation tube, and each detonation tube is fixedly arranged in each first round hole; the detonation engine main shaft drives the detonation tube to rotate around the axis of the detonation engine main shaft through a porous valve, one end of the porous valve, which is opposite to the driving motor, is provided with a detonation mixed gas pipeline assembly, an air pipeline assembly and an ignition cable, and one side of the porous valve, which is opposite to the driving motor, is fixedly connected with the end part of the detonation tube.
Description
Technical Field
The invention relates to the technical field of pulse detonation engines, in particular to a rotary tube type multitube pulse detonation engine.
Background
A pulse detonation engine is a new concept engine that utilizes detonation combustion waves to generate thrust. Since the propagation speed of detonation waves is extremely fast, which can reach several kilometers per second, the expansion of combustion products is not fast enough in the combustion process, and the detonation process is very close to an isovolumetric combustion process, so that the cycle thermal efficiency of the detonation wave is theoretically significantly higher than that of a conventional aeroengine based on an isobaric combustion process. In addition, the knocking process has extremely strong pressurizing capacity, and the knocking engine can cancel rotating parts such as a compressor, a turbine and the like, so that the knocking engine has the advantages of simple structure, light weight, large thrust-weight ratio and the like. The potential advantages described above make pulse detonation engines an extremely attractive aerospace propulsion technology and have received great attention in the scientific and industrial world of the last decade.
According to the characteristics of an air inlet device, the pulse detonation engines can be divided into two main types, namely a pneumatic valve type engine and a mechanical valve type engine. The pneumatic valve type detonation engine is simple in structure, a large amount of air flow is always discharged from an engine inlet in the detonation process, reverse impulse is generated, so that the propulsion performance is not ideal, and positive thrust is not obtained at present. Mechanical valve detonation engines can be categorized into diaphragm, reed and rotary valves. The diaphragm type and reed type mechanical valve is easy to damage and has short service life. This current study is relatively numerous rotary valve pulse detonation engines, and rotary valve pulse detonation engines that achieve positive thrust have been successfully developed. However, the rotary valve type detonation engine generally adopts a multi-pipe installation mode, the multi-pipe structure makes valve control coordination difficult, and the problems of difficult coordination and control of air inlet, ignition and the like among multiple pipes exist, and each detonation pipe needs to be provided with an air inlet valve, an oil inlet valve and corresponding pipelines, so that the rotary valve type detonation engine is complex in structure and inconvenient to use. Meanwhile, the traditional pulse detonation engine has large detonation tube heat load and lower heat dissipation rate, and needs to be improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rotary tube type multi-tube pulse detonation engine which is simple in structure, convenient to coordinate and control and high in heat dissipation rate.
The technical scheme for solving the technical problems is as follows: the utility model provides a multitube type multitube pulse detonation engine, includes driving motor, with driving motor output shaft coaxial fixed connection's detonation engine main shaft and two piece at least detonation tube, detonation tube axis with detonation engine main shaft axis parallel arrangement, detonation tube follows detonation engine main shaft axis circumference is radial equipartition setting, just detonation tube axis is unanimous to detonation engine main shaft axis distance, still includes the first detonation tube connection pad that is used for connecting the detonation tube, first detonation tube connection pad just to detonation tube axis vertical penetration be provided with detonation tube diameter assorted first round hole, detonation tube fixed mounting is in first round hole; the main shaft of the detonation engine drives the detonation tube to rotate around the main shaft axis of the detonation engine through a porous valve, one end of the porous valve, which is opposite to the driving motor, is provided with a detonatable gas mixing pipeline assembly, an air pipeline assembly and an ignition cable, one side of the porous valve, which is opposite to the driving motor, is fixedly connected with the end part of the detonation tube, and the end part of the detonation tube penetrates through the porous valve and extends into the porous valve.
Further, the detonation tube is provided with four or six detonation tubes.
Further, the first detonation tube connecting disc is a disc, and the center of the disc is opposite to the main shaft of the detonation engine.
Further, the detonation tube driving device further comprises a second detonation tube connecting disc, the second detonation tube connecting disc is consistent with the first detonation tube connecting disc in structure and is just opposite to the side, opposite to the driving motor, of the first detonation tube connecting disc, the detonation tube is fixedly installed on the second detonation tube connecting disc, and the end part of the detonation tube penetrates through the second detonation tube connecting disc and then extends outwards.
Further, the porous valve comprises a left end cover, a right end cover and a central valve body arranged between the left end cover and the right end cover, wherein the left end cover is fixedly connected with one end of the central valve body, a second round hole is formed in the middle of the left end cover in a penetrating way, the central valve body is right opposite to the second round hole in a penetrating way, a main shaft of the detonation engine penetrates through the second round hole and is fixedly arranged in the third round hole through a bearing, and one end, far away from the driving motor, of the main shaft of the detonation engine is fixedly arranged on the right end cover; the left end cover and the central valve body are opposite to and penetrate through the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole, the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole are all arranged at intervals, the circle centers of the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole are all arranged on the same circular ring taking the second circular hole as the circle center, the diameter of the circular ring is consistent with the distance from the axis of the knocking pipe to the main shaft of the knocking engine, the diameter of the combustible mixed gas injection hole, the diameter of the compressed air injection hole and the diameter of the ignition electric nozzle trigger hole are smaller than the diameter of the knocking pipe, a gas nozzle, an air injection device and an ignition electric nozzle are respectively arranged in the direction of the right end cover on the central valve body, and the gas nozzle, the air injection device and the ignition electric nozzle are respectively connected with the explosive mixed gas pipeline assembly, the air pipeline assembly and the ignition cable; the right end cover is opposite to the third round hole, a fourth round hole with the diameter matched with the diameter of the detonation tube is formed in the right end cover in a penetrating mode, the end part of the detonation tube is fixedly arranged in the fourth round hole, and the end part of the detonation tube abuts against the right end face of the central valve body after penetrating through the fourth round hole;
the surface of the central valve body, which is opposite to the right end cover, is convexly provided with a first cylinder and a second cylinder towards the direction close to the right end cover, the first cylinder and the second cylinder are concentrically arranged, the diameter size of the first cylinder is larger than that of the second cylinder, and a first annular groove is formed between the inner surface of the first cylinder and the outer surface of the second cylinder; a third cylinder and a fourth cylinder are arranged on the right end cover in a protruding mode towards the direction close to the central valve body, the third cylinder and the fourth cylinder are concentrically arranged, the diameter of the third cylinder is larger than that of the fourth cylinder, a second annular groove is formed between the inner surface of the third cylinder and the outer surface of the fourth cylinder, the first cylinder and the third cylinder are coaxially arranged, a first comb tooth sealing device is mounted between the first cylinder and the third cylinder in a matched mode, and a second comb tooth sealing device is mounted between the second cylinder and the fourth cylinder in a matched mode; the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole are arranged right opposite to the bottom of the first annular groove, and the fourth round hole is arranged right opposite to the bottom of the second annular groove.
Further, 5 combustible mixed gas injection holes are arranged in parallel, 3 compressed air injection holes are arranged in parallel, and 2 ignition nozzle trigger holes are arranged in parallel.
Further, the bearing is a ball bearing.
The beneficial effects of the invention are as follows:
1. according to the rotary pipe type multi-pipe pulse detonation engine, when the driving motor rotates, the main shaft of the detonation engine is driven to rotate, the main shaft of the detonation engine drives the detonation pipes to rotate through the porous valve, and the detonation pipes are fixedly connected through the first detonation pipe connecting disc, so that the detonation pipes can be better ensured to rotate along the axis of the main shaft of the detonation engine all the time, the relative positions among the detonation pipes are better ensured, and the reliability and the stability of the whole engine are improved. During the use, but the explosive gas mixing pipeline subassembly lets in the explosive gas mixing to the detonation tube inner chamber through the porous valve, then the detonation engine main shaft drives the detonation tube and rotates to the ignition power nozzle trigger hole, make the ignition power nozzle ignite the explosive gas mixing in the detonation tube inner chamber, trigger the detonation, after the detonation, the detonation engine main shaft continues to drive the detonation tube and rotates, and carry out the exhaust, air pipeline subassembly lets in the air in the detonation tube inner chamber when rotating to the compressed air jet hole, scavenge the detonation tube inner chamber, afterwards the detonation engine main shaft continues to drive the detonation tube and rotates to the combustible gas jet hole, but the explosive gas mixing pipeline subassembly lets in the explosive gas mixing in the detonation tube inner chamber, repeat above-mentioned process and realize the whole cycle working process of detonation engine. The problems of inconsistent air intake, ignition and scavenging of the detonation engine and low engine working frequency can be solved by adjusting the rotating speed of the driving motor and the action frequency of the explosive mixed gas pipeline assembly, the air pipeline assembly and the ignition cable. Meanwhile, in the process of driving the detonation tube to rotate by the main shaft of the detonation engine, the detonation tube can better dissipate heat from the end of detonation to the process of re-introducing fuel gas into the detonation tube. The problems of large heat load and low heat dissipation efficiency of the detonation tube of the detonation engine can be effectively solved.
2. The first detonation tube connecting disc is a disc, the detonation tube can be better fixed, the rotor balance is facilitated due to the fact that the disc is arranged, the rotor is a rotatable structure formed by the detonation tube, the detonation engine main shaft and the connecting disc, and reliability of the rotation process of the detonation tube is improved.
3. The second detonation tube connecting disc is arranged, so that the detonation tube can be further fixed by the first detonation tube connecting disc, and the stability of the detonation tube in the rotation process is improved.
4. The right end cover of the porous valve can rotate, the end part of the detonation tube is fixedly arranged on the right end cover, the right end cover drives the detonation tube to rotate, the detonation tube is sequentially communicated with the inner cavity of the detonation tube through the gas nozzle, the ignition electric nozzle and the air injection device, then the detonation tube is ignited to trigger and expand to exhaust, and finally the air injection device is utilized to scavenge the residual gas in the inner cavity of the detonation tube, so that the detonation tube can share one set of gas nozzle, the ignition electric nozzle and the air injection device in the rotating working process, and the problems of incoordination between gas inlet, ignition and scavenging caused by the fact that each detonation tube is respectively provided with one set of gas nozzle, the ignition electric nozzle and the air injection device and the problem of low working frequency of an engine are avoided. Meanwhile, the structure can be better simplified, the weight is reduced, the best performance of the engine is realized, the heat dissipation efficiency of the detonation tube is improved, and the heat load of the detonation tube is reduced.
5. The porous valve is provided with the first comb teeth sealing device and the second comb teeth sealing device, so that air flow loss at the positions of the gas nozzle and the air injection device can be effectively reduced.
6. The detonation tube is provided with four or six detonation tubes, and the detonation tube can share the gas supply ignition system formed by the gas nozzle, the ignition electric nozzle and the air injection device, so that the structure of the engine is simplified and the efficiency is improved. Meanwhile, the porous valve can drive the detonation tube to rotate, heat dissipation of the detonation tube is also facilitated, ignition and combustion can be performed only when the detonation tube rotates to the ignition position again, and the heat dissipation condition of the detonation tube can be changed by controlling the rotating speed of the driving motor.
7. The time that the detonation tube needs to enter the air course is longest, so be provided with five combustible mixed gas jet orifices, scavenging time is shorter, is provided with three compressed air jet orifices, and ignition trigger time is shortest, so be provided with two ignition electric mouth trigger holes, set up like this and comprehensively considered the working process and the principle of detonation tube at rotatory detonation process, the performance of improvement detonation engine that can be better.
8. The combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger holes are all arranged at intervals, after the detonation tube is ignited and triggered to detonate, the detonation tube rotates to the compressed air injection hole from the ignition electric nozzle trigger hole and rotates to the combustible mixed gas injection hole from the compressed air injection hole, heat dissipation can be better, the heat load of the detonation tube is reduced, and therefore the service life of the detonation tube is prolonged.
9. The ball bearing has simple structure and convenient use, and can better meet the use requirement.
Drawings
Fig. 1 is a schematic structural diagram of a rotary tube type multitube pulse detonation engine according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of the structure of the porous valve in fig. 1.
Fig. 3 is a right side view of the porous valve of fig. 2 with the right end cap removed.
Fig. 4 is a schematic structural view of the first knock tube connection pad of fig. 1.
Fig. 5 is a time distribution diagram of the operation process of the rotary tube type multitube pulse detonation engine according to the specific embodiment of the present invention, wherein a is the air intake time, b is the ignition time, c is the exhaust time, and d is the scavenging time.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
1-5, a rotary tube type multitube pulse detonation engine comprises a driving motor 1, a detonation engine main shaft 3 and at least two detonation tubes 18, wherein the detonation engine main shaft 3 is coaxially and fixedly connected with an output shaft 2 of the driving motor 1, the axes of the detonation tubes 18 are parallel to the axis of the detonation engine main shaft 3, the detonation tubes 18 are uniformly distributed along the circumferential direction of the axis of the detonation engine main shaft 3 in a radial mode, the distances between the axes of the detonation tubes 18 and the detonation engine main shaft 3 are consistent, the rotary tube type multitube pulse detonation engine further comprises a first detonation tube connecting disc 16 used for connecting the detonation tubes 18, the first detonation tube connecting disc 16 is vertically and penetratingly provided with a first round hole 161 which is matched with the diameter of the detonation tubes 18 and the detonation tubes 18 are fixedly arranged in the first round hole 161; the detonation engine main shaft 3 drives the detonation tube 18 to rotate around the axis of the detonation engine main shaft 3 through a porous valve, one end of the porous valve, which is opposite to the driving motor 1, is provided with a detonation mixed gas pipeline assembly 5, an air pipeline assembly 6 and an ignition cable 4, one side of the porous valve, which is opposite to the driving motor 1, is fixedly connected with the end part of the detonation tube 18, and the end part of the detonation tube 18 penetrates through the porous valve and extends into the porous valve.
Of course, in the specific implementation, the premixed gas which is introduced into the detonation tube by the explosive gas mixing tube assembly has the same effect as the premixed gas which is respectively introduced into the fuel and the oxidant, so both the premixed gas and the premixed gas are in the scope of the invention.
In this embodiment, during implementation, the air introduced into the compressed air injection hole by the air pipeline assembly can be replaced by corresponding inert gas, so that the scheme of introducing inert gas to perform scavenging also belongs to the protection scope of the invention.
In the embodiment, during implementation, the motor in the scheme can be replaced by a turbine or a compressor and a turbine are combined, namely, a turbine is arranged at the outlet of a detonation tube at the tail end of the main shaft of the engine, and the turbine is used for driving the detonation tube to rotate; or the connection part of the front end of the main shaft and the main shaft of the motor is changed into the connection part with the air compressor, the outlet of the knocking pipe at the tail end of the main shaft of the engine is provided with the turbine, the compressor turbine is used for driving the knocking pipe to rotate and providing compressed air for the engine so as to finish the circulating work of the engine, and the invention belongs to the scope to be protected.
In this embodiment, a plurality of detonation tubes 18 may be provided, which falls within the scope of the present invention.
In this embodiment, the first detonation tube connection pad 16 and the second detonation tube connection pad 17 are discs, and in a specific implementation, the first detonation tube connection pad 16 and the second detonation tube connection pad 17 are triangular or other shapes, and it is within the scope of the invention to increase the number of connection pads or change the relative positions of the connection pads and the detonation tubes.
In this embodiment, the first detonation tube connection disc 16 is a disc, and the center of the disc is opposite to the spindle 3 of the detonation engine.
In this embodiment, the detonation tube driving device further includes a second detonation tube connection pad 17, the second detonation tube connection pad 17 is consistent with the first detonation tube connection pad 16 in structure and is arranged on one side of the first detonation tube connection pad 16 opposite to the driving motor 1 at right intervals, the detonation tube 18 is fixedly installed on the second detonation tube connection pad 17, and the end part of the detonation tube 18 penetrates through the connection pad of the second detonation tube 17 and extends outwards.
In this embodiment, the porous valve includes a left end cover 7, a right end cover 14, and a central valve body 11 disposed between the left end cover 7 and the right end cover 14, where the left end cover 7 is fixedly connected with one end of the central valve body 11, a second round hole is penetrated and disposed in the middle of the left end cover 7, the central valve body 11 is opposite to the second round hole, a third round hole 19 is penetrated and disposed in the middle of the left end cover 7, the detonation engine spindle 3 is fixedly mounted in the third round hole 19 through a bearing 13 after penetrating through the second round hole, and one end of the detonation engine spindle 3 far away from the driving motor 1 is fixedly mounted on the right end cover 14; the left end cover 7 and the central valve body 11 are opposite to and penetrate through a combustible mixed gas injection hole 22, a compressed air injection hole 23 and an ignition electric nozzle trigger hole 20, the combustible mixed gas injection hole 22, the compressed air injection hole 23 and the ignition electric nozzle trigger hole 20 are all arranged at intervals, the circle centers of the combustible mixed gas injection hole 22, the compressed air injection hole 23 and the ignition electric nozzle trigger hole 20 are all arranged on the same circular ring taking the second circular hole as the circle center, the diameter of the circular ring is consistent with the distance from the axis of the detonation tube 18 to the axis of the main shaft of the detonation engine, the diameter of the combustible mixed gas injection hole 22, the diameter of the compressed air injection hole 23 and the diameter of the ignition electric nozzle trigger hole 20 are smaller than the diameter of the detonation tube 18, the combustible mixed gas injection hole 22, the diameter of the compressed air injection hole 23 and the ignition electric nozzle trigger hole 20 on the central valve body 11 are respectively provided with a gas nozzle 8, an air injection device 10 and an ignition electric nozzle 9 in the direction of the right end cover 14, and the gas nozzle 8, the air injection device 10 and the ignition electric nozzle 9 are respectively connected with the ignition gas tube assembly 5, the air tube assembly 4 and the ignition electric cable assembly 4; the right end cover 14 is opposite to the third round hole, a fourth round hole with the diameter matched with the diameter of the detonation tube 18 is formed in the third round hole in a penetrating mode, the end portion of the detonation tube 18 is fixedly arranged in the fourth round hole, and the end portion of the detonation tube 18 abuts against the right end face of the central valve body 11 after penetrating through the fourth round hole;
the central valve body 11 is provided with a first cylinder and a second cylinder in a protruding manner towards the direction close to the right end cover on the surface opposite to the right end cover, the first cylinder and the second cylinder are concentrically arranged, the diameter size of the first cylinder is larger than that of the second cylinder, and a first annular groove is formed between the inner surface of the first cylinder and the outer surface of the second cylinder; a third cylinder and a fourth cylinder are arranged on the right end cover in a protruding mode towards the direction close to the central valve body, the third cylinder and the fourth cylinder are concentrically arranged, the diameter of the third cylinder is larger than that of the fourth cylinder, a second annular groove is formed between the inner surface of the third cylinder and the outer surface of the fourth cylinder, the first cylinder and the third cylinder are coaxially arranged, a first comb tooth sealing device is matched between the first cylinder and the third cylinder, and a second comb tooth sealing device is matched between the second cylinder and the fourth cylinder; the combustible mixed gas injection hole 22, the compressed air injection hole 23 and the ignition nozzle trigger hole 20 are arranged right opposite to the bottom of the first annular groove, and the fourth round hole is arranged right opposite to the bottom of the second annular groove. Furthermore, the first comb teeth sealing device and the second comb teeth sealing device can be replaced by honeycomb sealing and graphite sealing, and the invention also belongs to the scope to be protected.
In this embodiment, 5 combustible mixed gas injection holes 22 are arranged in parallel, 3 compressed air injection holes 23 are arranged in parallel, and 2 ignition nozzle trigger holes 20 are arranged in parallel. Of course, in the specific implementation, the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole can be arbitrarily arranged in plurality, and the diameter and the shape of the holes can be arbitrarily arranged, which belong to the scope of the invention.
In this embodiment, the bearing 13 is a ball bearing. Of course, in the specific implementation, the number of the ball bearings is increased or the positions of the ball bearings in the axial direction of the porous valve are changed, and the ball bearings are replaced by the roller bearings, which belong to the scope of protection of the invention.
The beneficial effects of the invention are as follows:
1. according to the rotary tube type multi-tube pulse detonation engine provided by the invention, when the driving motor 1 rotates, the detonation engine main shaft 3 is driven to rotate, the detonation engine main shaft 3 drives the detonation tubes 18 to rotate through the porous valve, and the detonation tubes 18 are fixedly connected through the first detonation tube connecting disc 16, so that the detonation tubes 18 can be better ensured to always rotate along the axis of the detonation engine main shaft 3, the relative positions among the detonation tubes 18 can be better ensured, and the reliability and stability of the whole engine are improved. When the explosion-proof mixed gas pipe assembly is used, the explosion-proof mixed gas is introduced into the inner cavity of the explosion pipe through the porous valve, then the main shaft 3 of the explosion-proof engine drives the explosion pipe 18 to rotate to the ignition nozzle trigger hole 20, the ignition nozzle 9 ignites the explosion-proof mixed gas in the inner cavity of the explosion pipe to trigger and detonate, after the explosion is finished, the main shaft of the explosion-proof engine continuously drives the explosion pipe to rotate and exhaust, when the main shaft 3 of the explosion-proof engine rotates to the compressed air injection hole 23, the main shaft 6 of the explosion-proof engine is used for introducing air into the inner cavity of the explosion pipe 18 to scavenge the inner cavity of the explosion pipe, and then the main shaft 3 of the explosion-proof engine continuously drives the explosion pipe 18 to rotate to the combustible mixed gas injection hole 22, and the main shaft 5 of the explosion-proof mixed gas is introduced into the inner cavity of the explosion pipe 18 to repeat the processes to realize the whole circulation working process of the explosion-proof engine. By adjusting the rotation speed of the driving motor 1 and the operating frequencies of the explosive gas mixing pipeline assembly 5, the air pipeline assembly 6 and the ignition cable 4, the problems of inconsistent air intake, ignition and scavenging of the detonation engine and low engine operating frequency can be solved. Meanwhile, in the process of driving the detonation tube 18 to rotate by the detonation engine main shaft 3, the detonation tube 18 can better dissipate heat from the end of detonation to the process of re-introducing fuel gas into the detonation tube. The problems of large heat load and low heat dissipation efficiency of the detonation tube of the detonation engine can be effectively solved.
2. The first detonation tube connecting disc 16 is a disc, so that the detonation tube can be better fixed, the rotor balance is facilitated by the disc, and the reliability of the rotation process of the detonation tube 18 is improved.
3. The second detonation tube connecting disc 17 is arranged, so that the first detonation tube connecting disc 16 can be assisted to further fix the detonation tube 18, and the stability of the detonation tube 18 in the rotation process is improved.
4. The right end cover 14 of the porous valve can rotate, the end part of the detonation tube 18 is fixedly arranged on the right end cover 14, the right end cover 14 drives the detonation tube 18 to rotate, the explosive gas mixture is respectively introduced into the inner cavity of the detonation tube 18 through the gas nozzle 8, the ignition electric nozzle 9 and the air injection device 10, then ignition is triggered and expanded to exhaust, and finally the air injection device 10 is utilized to scavenge the residual gas in the inner cavity of the detonation tube, so that the detonation tube 18 can share one set of gas nozzle 8, the ignition electric nozzle 9 and the air injection device 10 in the rotating working process, and the problems of incoordination between gas inlet, ignition and scavenging caused by that each detonation tube 18 is respectively provided with one set of gas nozzle 8, the ignition electric nozzle 9 and the air injection device 10 and the problem of low working frequency of an engine are avoided. Meanwhile, the structure can be better simplified, the weight is reduced, the best performance of the engine is realized, the heat dissipation efficiency of the detonation tube is improved, and the heat load of the detonation tube is reduced.
5. The porous valve is provided with the first comb teeth sealing device and the second comb teeth sealing device, so that the air flow loss at the gas nozzle 8 and the air injection device 10 can be effectively reduced.
6. The number of the detonation tubes 18 is four or six, and the detonation tubes 18 can share the gas supply ignition system formed by the gas nozzle 8, the ignition electric nozzle 9 and the air injection device 10, so that the structure of the engine is simplified and the efficiency is improved. Meanwhile, the porous valve can drive the detonation tube 18 to rotate, heat dissipation of the detonation tube 18 is also facilitated, ignition and combustion can be performed only when the detonation tube 18 rotates to the ignition position again, and the heat dissipation condition of the detonation tube 18 can be changed by controlling the rotating speed of the driving motor 1.
7. The time required for the air inlet process of the knocking pipe 18 is longest, so that five combustible mixed gas injection holes 22 are arranged, the scavenging time is shorter, three compressed air injection holes 23 are arranged, the ignition trigger time is shortest, and two ignition electric nozzle trigger holes 20 are arranged, so that the working process and principle of the knocking pipe 18 in the rotary knocking process are comprehensively considered, and the service performance of the knocking engine can be better improved.
8. The combustible mixed gas injection hole 22, the compressed air injection hole 22 and the ignition electric nozzle trigger hole 20 are all arranged at intervals, after the detonation tube 18 is ignited and triggered to detonate, the detonation tube rotates to the compressed air injection hole 23 from the ignition electric nozzle trigger hole 20 and rotates to the combustible mixed gas injection hole 22 from the compressed air injection hole 23, heat dissipation can be better, the heat load of the detonation tube 18 is reduced, and therefore the service life of the detonation tube 18 is prolonged.
9. The ball bearing 13 has simple structure and convenient use, and can better meet the use requirement.
The working principle of the device is as follows (taking a single detonation tube as an example):
the driving motor 1 acts to drive the knocking engine main shaft 3 to rotate, and the knocking engine main shaft 3 drives the knocking pipe 18 to rotate around the axis of the knocking engine main shaft 3 through the right end cover 14 of the porous valve; the end of the detonation tube 18 rotates to the combustible mixed gas injection hole 22 to charge, the combustible mixed gas is injected into the detonation tube 18 through the gas nozzle 8, then the detonation tube 18 continues to rotate to the ignition nozzle trigger hole 20 to ignite, the ignition nozzle trigger hole 20 ignites and triggers the combustible mixed gas in the detonation tube 18 through the ignition nozzle 9 to start detonation, then the detonation tube 18 continues to rotate, when the end of the detonation tube 18 rotates between the ignition nozzle trigger hole 20 and the compressed air injection hole 23, one end of the detonation tube 18 positioned outside the porous valve is exhausted, then the detonation tube 18 rotates to the compressed air injection hole 23, the air injection device 10 in the compressed air injection hole 23 injects air into the inner cavity of the detonation tube 18 to scavenge residual gas after combustion in the detonation tube 18, and after scavenging, the detonation tube 18 continues to rotate to the position of the combustible mixed gas injection hole 22 to charge, thereby completing an action process of the whole detonation engine, the driving motor 1 continues to rotate, and the action process is repeated continuously, so that the whole cycle working process of the detonation engine is realized.
In the present invention, it should be construed that "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, for convenience of description and simplification of the description, and are not to be construed as limiting the present invention, but rather as indicating or implying that a specific orientation, construction and operation in a specific orientation is necessary.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The rotary tube type multitube pulse detonation engine comprises a driving motor, a detonation engine main shaft and at least two detonation tubes, wherein the detonation engine main shaft is coaxially and fixedly connected with an output shaft of the driving motor, the axis of each detonation tube is parallel to the axis of the detonation engine main shaft, the detonation tubes are uniformly distributed in a radial manner along the circumferential direction of the axis of the detonation engine main shaft, and the distances from the axis of each detonation tube to the axis of the detonation engine main shaft are consistent, and the rotary tube type multitube pulse detonation engine is characterized by further comprising a first detonation tube connecting disc used for connecting the detonation tubes, the first detonation tube connecting disc is vertically and penetratingly provided with a first round hole matched with the diameter of each detonation tube opposite to the axis of each detonation tube, and the detonation tubes are fixedly arranged in the first round holes; the main shaft of the detonation engine drives the detonation tube to rotate around the main shaft axis of the detonation engine through a porous valve, one end of the porous valve, which is opposite to the driving motor, is provided with a detonatable gas mixing pipeline assembly, an air pipeline assembly and an ignition cable, one side of the porous valve, which is opposite to the driving motor, is fixedly connected with the end part of the detonation tube, and the end part of the detonation tube penetrates through the porous valve and extends into the porous valve;
the first detonation tube connecting disc is a disc, and the center of the disc is opposite to the spindle of the detonation engine;
the detonation tube is fixedly arranged on the second detonation tube connecting disc, and the end part of the detonation tube penetrates through the second detonation tube connecting disc and then extends outwards;
the multi-hole valve comprises a left end cover, a right end cover and a central valve body arranged between the left end cover and the right end cover, wherein the left end cover is fixedly connected with one end of the central valve body, a second round hole is formed in the middle of the left end cover in a penetrating manner, the central valve body is right opposite to the second round hole in a penetrating manner, a main shaft of the knocking engine passes through the second round hole and is fixedly arranged in the third round hole through a bearing, and one end, far away from the driving motor, of the main shaft of the knocking engine is fixedly arranged on the right end cover; the left end cover and the central valve body are opposite to and penetrate through the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole, the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole are all arranged at intervals, the circle centers of the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole are all arranged on the same circular ring taking the second circular hole as the circle center, the radius of the circular ring is consistent with the distance from the axis of the knocking pipe to the main shaft of the knocking engine, the diameter of the combustible mixed gas injection hole, the diameter of the compressed air injection hole and the diameter of the ignition electric nozzle trigger hole are smaller than the diameter of the knocking pipe, a gas nozzle, an air injection device and an ignition electric nozzle are respectively arranged in the direction of the right end cover on the central valve body, and the gas nozzle, the air injection device and the ignition electric nozzle are respectively connected with the explosive mixed gas pipeline assembly, the air pipeline assembly and the ignition cable; the right end cover is provided with a fourth round hole with the diameter matched with the diameter of the detonation tube in a penetrating way, the end part of the detonation tube is fixedly arranged in the fourth round hole, and the end part of the detonation tube is abutted to the right end face of the central valve body after passing through the fourth round hole;
the surface of the central valve body, which is opposite to the right end cover, is convexly provided with a first cylinder and a second cylinder towards the direction close to the right end cover, the first cylinder and the second cylinder are concentrically arranged, the diameter size of the first cylinder is larger than that of the second cylinder, and a first annular groove is formed between the inner surface of the first cylinder and the outer surface of the second cylinder; a third cylinder and a fourth cylinder are arranged on the right end cover in a protruding mode towards the direction close to the central valve body, the third cylinder and the fourth cylinder are concentrically arranged, the diameter of the third cylinder is larger than that of the fourth cylinder, a second annular groove is formed between the inner surface of the third cylinder and the outer surface of the fourth cylinder, the first cylinder and the third cylinder are coaxially arranged, a first comb tooth sealing device is matched between the first cylinder and the third cylinder, and a second comb tooth sealing device is matched between the second cylinder and the fourth cylinder; the combustible mixed gas injection hole, the compressed air injection hole and the ignition electric nozzle trigger hole are arranged right opposite to the bottom of the first annular groove, and the fourth round hole is arranged right opposite to the bottom of the second annular groove.
2. The rotary tube multi-tube pulse detonation engine of claim 1, wherein the detonation tube is provided with four or six.
3. The rotary tube type multitube pulse detonation engine of claim 2, wherein 5 combustible mixed gas injection holes are arranged in parallel, 3 compressed air injection holes are arranged in parallel, and 2 firing nozzle trigger holes are arranged in parallel.
4. The rotary pipe multi-tube pulse detonation engine of claim 2, wherein the bearing is a ball bearing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810212794.6A CN108361125B (en) | 2018-03-15 | 2018-03-15 | Rotary pipe type multitube pulse detonation engine |
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| CN201810212794.6A CN108361125B (en) | 2018-03-15 | 2018-03-15 | Rotary pipe type multitube pulse detonation engine |
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| CN108361125B true CN108361125B (en) | 2023-05-23 |
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| CN113153569B (en) * | 2021-04-27 | 2022-10-28 | 西北工业大学 | Multi-pipe pulse detonation engine capable of stably exhausting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345758A (en) * | 1993-04-14 | 1994-09-13 | Adroit Systems, Inc. | Rotary valve multiple combustor pulse detonation engine |
| CN101806260A (en) * | 2010-03-04 | 2010-08-18 | 西北工业大学 | Multitube parallel pulse detonation combustion chamber and ignition detonation method thereof |
| CN106801650A (en) * | 2017-01-12 | 2017-06-06 | 西北工业大学 | A kind of pressure-actuated self adaptation pulse-knocking engine valve system |
| CN208010478U (en) * | 2018-03-15 | 2018-10-26 | 张俊良 | Elbow type multi-pipe impulse detonation engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112012031715A2 (en) * | 2010-06-15 | 2016-11-01 | Exponential Technologies Inc | multitube pulse detonation motor without valve |
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2018
- 2018-03-15 CN CN201810212794.6A patent/CN108361125B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345758A (en) * | 1993-04-14 | 1994-09-13 | Adroit Systems, Inc. | Rotary valve multiple combustor pulse detonation engine |
| CN101806260A (en) * | 2010-03-04 | 2010-08-18 | 西北工业大学 | Multitube parallel pulse detonation combustion chamber and ignition detonation method thereof |
| CN106801650A (en) * | 2017-01-12 | 2017-06-06 | 西北工业大学 | A kind of pressure-actuated self adaptation pulse-knocking engine valve system |
| CN208010478U (en) * | 2018-03-15 | 2018-10-26 | 张俊良 | Elbow type multi-pipe impulse detonation engine |
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