CN110319453B - Telescopic gas supply pipeline for slender combustion chamber - Google Patents
Telescopic gas supply pipeline for slender combustion chamber Download PDFInfo
- Publication number
- CN110319453B CN110319453B CN201910610524.5A CN201910610524A CN110319453B CN 110319453 B CN110319453 B CN 110319453B CN 201910610524 A CN201910610524 A CN 201910610524A CN 110319453 B CN110319453 B CN 110319453B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- guide rod
- port
- end cover
- flange plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
- F23K5/007—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2400/00—Pretreatment and supply of gaseous fuel
- F23K2400/20—Supply line arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
- Pipeline Systems (AREA)
Abstract
The invention provides a telescopic gas supply pipeline for a slender combustion chamber, and belongs to the technical field of aviation propulsion power systems. The invention comprises an outermost pipeline, an innermost pipeline, a middle-stage pipeline, a pipeline sealing ring, a guide rod, a guide structure, a driving device and a fixing device. The driving device comprises a frequency modulation motor, a motor base and a gear. The fixing device comprises a bearing end cover, a cylindrical roller bearing, a flange plate, a fixing rod, a sleeve, a bearing end cover sealing ring and a supporting rod. The pipeline can be controlled on one side, continuous extension and shortening of the pipeline can be achieved in a limited space, extension and retraction at different speeds and rapid stop and switching can be achieved, and function switching is rapid. Through screw thread transmission of the screw rod, the telescopic feeding is accurate and reliable, and the sealing device has good sealing performance and is suitable for operation and use in a high-pressure environment. The invention has simple structure, stable operation and convenient maintenance, and can be suitable for working environments with different depths, lengths and spaces by simple modification.
Description
Technical Field
The invention relates to a telescopic gas supply pipeline for a slender combustion chamber, and belongs to the technical field of aviation propulsion power systems.
Background
During the design and use of aerospace engines, thermo-acoustic instability is often encountered. The thermo-acoustic instability phenomenon is an instability phenomenon generated by mutual coupling and amplification of unstable heat release and acoustic waves, relates to various aspects such as fluid, combustion, heat transfer, acoustics and the like, and is generated in various power devices, and the serious destructive and strong noise of the power devices causes intensive research in various aspects.
In 1859, Rijke placed a hot wire mesh in the lower half of a pipe (i.e., a combustion chamber) that was open at both ends and was placed upright, and immediately inside the pipe, a strong acoustic oscillation was emitted. In the slow flow of air in the duct, there are two states of compression and expansion. If heat is supplied to the compression part during compression and heat is released externally during expansion, the compression and release states are strengthened continuously, and the sound wave oscillation is generated. This is typically an unstable sounding due to thermal, acoustic, fluid interactions. Therefore, the Rijke tube becomes a simple experimental device for researching the phenomenon of the instability of the thermoacoustic sound.
Researchers found in Rijke tube experiments that the intensity of the generated oscillating sound wave changes with the position of the heat source. The position of the heat source is effectively and accurately changed, and the method plays a vital role in researching the influence of the position of the heat source on the working result of the engine. The Rijke tube is slender, and the high temperature environment is during the work, and researchers do not conveniently get into the Rijke inside to adjust the heat source position. When the heat wire mesh is used as a heat source, the position of the heat source is usually adjusted by adopting a dragging mode, and the mode is not flexible and accurate enough and has great influence on the accuracy of an experimental result.
In the field of aerospace propulsion research, researchers often use burners to ignite combustible gas inside a pipeline to generate heat for experiments. The traditional gas pipe for supplying gas to the burner mostly adopts a folding mode, and the length and the position of a heat source are adjustable. However, the operation in the folding mode needs a large space to be completed, and in the Rijke tube experiment, the combustion chamber is slender and has a limited space, so that the mode is not applicable, and the flexible and accurate adjustment of the position of a heat source cannot be completed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a telescopic air supply pipeline for a slender combustion chamber, aiming at solving the problem that the length and the position of an air supply pipeline of a burner cannot be effectively adjusted due to the structural space limitation of the combustion chamber in a Rijke tube experiment, so that the position of a heat source cannot be flexibly adjusted. The invention can not only convey gas in a limited space for a long distance, but also continuously, automatically and randomly adjust the length and the position of the pipeline, thereby flexibly adjusting the position of a heat source.
The invention is realized by the following technical scheme.
A telescopic gas supply pipeline for a slender combustion chamber comprises an outermost pipeline, an innermost pipeline, a middle-stage pipeline, a pipeline sealing ring, a guide rod, a guide structure and a driving device. The driving device comprises a frequency modulation motor, a motor base and a gear. In order to ensure that the gas supply pipeline can stably convey high-pressure gas to the combustor, the gas supply device further comprises a fixing device, and the fixing device comprises a bearing end cover, a cylindrical roller bearing, a flange plate, a fixing rod, a sleeve, a bearing end cover sealing ring and a supporting rod.
Among the outermost pipe, the middle-stage pipe, and the innermost pipe, the outermost pipe has the largest diameter, and the innermost pipe has the smallest diameter. The three parts are mutually connected and matched to form a telescopic air supply channel structure.
As shown in fig. 4, at one end of the outermost pipe, the inner diameter of the port is smaller than that of the rest of the pipe, and the inner diameter surface of the port is provided with threads. A shaft collar and two shaft shoulders are arranged in a step shape in the middle of the outer surface of the outermost pipeline; a collar and a shoulder are provided on the outer surface of the other end.
As shown in fig. 6, at one end of the middle stage pipe, the inner diameter at the port is smaller than the inner diameter of the rest of the pipe, and the inner diameter surface of the port is provided with threads. The outer diameter of the port at the other end of the pipeline is larger than the outer diameter of other parts of the pipeline, a circle of groove is arranged on the outer surface of the outer diameter of the port, the outer surface of the port is not threaded, and threads are arranged on the outer surfaces of other parts of the pipeline. The number of the intermediate-stage pipelines can be selected according to experimental requirements, and the pore size of the pipelines can be adjusted correspondingly.
As shown in fig. 7, at one end of the innermost pipe, the outer diameter at the port is larger than the outer diameter of the rest of the pipe, a circle of groove is arranged on the outer surface of the outer diameter of the port, and the outer surface at the port is not threaded. The outer surface of the other end port of the pipeline is provided with threads, the outer surface of the middle part of the pipeline body is provided with threads, and the outer surface of one section of the pipeline body between the two sections of the threads is not provided with threads.
The sizes of the pipeline sealing ring and the bearing end cover sealing ring are respectively determined according to the sizes of the corresponding pipeline and the corresponding bearing end cover, and a standard O-shaped sealing ring can be specifically adopted.
The guide rods comprise a maximum diameter guide rod, a middle-stage guide rod and a minimum diameter guide rod.
As shown in fig. 8, the maximum diameter guide rod is a hollow cylinder, and the outer surface of one end port of the maximum diameter guide rod is provided with an external thread. The inner surface of the other end port of the guide rod is not provided with a groove guide rail, and the inner surface of the other part of the guide rod is provided with a groove guide rail (such as a cross groove).
As shown in fig. 9, the middle-stage guide rod is a hollow cylinder, a boss (e.g., a cross boss) is provided on the outer surface of the port at one end, a groove-free guide rail is provided on the inner surface of the port at the other end, and a groove-free guide rail (e.g., a cross groove) is provided on the inner surface of the other portion of the guide rod. The number of the middle-stage guide rods can be selected according to experiment requirements, and the guide rods only need to be correspondingly adjusted in aperture size.
As shown in fig. 10, the guide rod with the smallest diameter is a solid cylinder, and a boss (e.g., a cross-shaped boss) is arranged on the outer surface of the port at one end of the guide rod, and a thread is arranged on the outer surface of the port at the other end of the guide rod and connected with the guide structure through the thread.
The guide structure is used for realizing synchronous axial movement of the pipeline and the guide rod, limiting the innermost pipeline to be non-rotatable, supporting the whole pipeline and ensuring that the deflection of the pipeline is very small and the transmission fit of the screw threads of the lead screw is not influenced. If the degree of expansion and contraction of the pipeline is large (the number of the pipelines in the middle stage is large), the number of the guide structures can be increased according to the situation.
As shown in fig. 12, the bearing end caps include a first bearing end cap and a second bearing end cap. All adopt the through type bearing end cover, the internal surface of bearing end cover is equipped with the round recess for lay the bearing end cover sealing washer, realize with outside pipeline between sealed. And the size of the bearing end cover is determined according to the working requirement.
The flange plate comprises a first flange plate and a second flange plate. The first flange plate is of a step type, a boss with through holes (usually 4) is arranged in the middle of a circular surface on one side of the first flange plate, and a convex ring is arranged on the inner surface of the middle of a circular surface on the other side of the first flange plate and used for positioning the cylindrical roller bearing. Meanwhile, the outer edge side of the circular boss of the first flange is provided with internal thread through holes which are symmetrical with each other, and as shown in fig. 13, the guide rod with the largest diameter is fixed on the first flange through the internal thread through holes. The second flange plate has the same structure and different size as the first flange plate, but has no through hole with internal thread on its circular surface.
The cylindrical roller bearing comprises a first cylindrical roller bearing and a second cylindrical roller bearing, the first cylindrical roller bearing and the second cylindrical roller bearing are standard cylindrical roller bearings, and parameters such as the inner diameter and the width of the bearing are determined according to working requirements.
The fixed rod is a cylinder with threads at two ends, and the first flange plate and the second flange plate are connected and positioned through nuts.
The support rod and the guide structure form a support system together, as shown in fig. 15. The bracing piece main part is the cylinder, and one end passes through threaded connection with guide structure, through changing the thread engagement degree, changes whole braced system height, and a round wheel is connected to the other end, makes whole braced system move through the roll of round wheel, and is nimble convenient.
The second gear and the first gear are both standard spur gears, and parameters such as modulus, tooth number, inner hole size, key groove size, tooth width and the like are determined according to working requirements.
The frequency modulation motor is connected on the motor cabinet, and the motor shaft is directly connected with the second gear through key cooperation for transmission, and is simple and reliable.
As shown in fig. 16, the motor base is a flat plate as a whole, four round holes are formed in the middle of the motor base and used for being installed and positioned with bolts for a motor, bosses with through holes are arranged at four corners of the flat plate, a fixing rod can pass through the bosses conveniently, and the motor base is fixed between the first flange plate and the second flange plate.
The connection relationship of the components is as follows:
and a first gear, a sleeve, a first flange plate, a second cylindrical roller bearing and a second bearing end cover are sequentially arranged at the collar at the middle position of the outermost pipeline. The first gear is connected with the outermost pipeline through key matching, the shaft collar and the sleeve play a role in axially positioning the first gear, and the second bearing end cover is connected with the first flange plate through a bolt and plays a role in fixing and positioning the second cylindrical roller bearing. And a first sealing ring of the bearing end cover is arranged at the groove on the inner surface of the second bearing end cover to realize the sealing between the second bearing end cover and the outermost pipeline.
And a second flange plate, a first cylindrical roller bearing and a first bearing end cover are sequentially arranged at the shaft shoulder at the end side of the outermost pipeline. The first bearing end cover is connected with the second flange plate through bolts and plays a role in fixing and positioning the first cylindrical roller bearing. And a second sealing ring of the bearing end cover is arranged at the groove on the inner surface of the first bearing end cover to realize the sealing between the first bearing end cover and the outermost pipeline.
The first flange plate and the second flange plate are connected through a fixing rod. When the two fixing rods are connected, the two fixing rods penetrate through the round hole of the motor base to fix the motor base on the fixing rods. Meanwhile, the second gear is meshed with the first gear, so that the power of the frequency modulation motor is transmitted to the outermost pipeline through the first gear and the second gear.
As shown in fig. 18, the first pipe seal is installed in the groove of the intermediate-stage pipe, and the second pipe seal is installed in the groove of the innermost pipe. And screwing the innermost pipeline into the middle-stage pipeline through threads, and screwing the middle-stage pipeline into the outermost pipeline through threads. The end side of the innermost pipeline is connected with a guide structure through threads, and the guide structure is connected with two support rods through threads to form a support system. The height of the support system is changed by adjusting the threaded engagement degree of the support rod and the guide structure. The non-threaded end of the supporting rod is provided with a round wheel which is in contact with the combustion chamber, so that the supporting system can move flexibly.
As shown in FIG. 19, the guide rod with the smallest diameter is sleeved in the guide rod of the middle stage and is matched with the groove guide rail of the guide rod of the middle stage through a boss. The middle-stage guide rod is sleeved into the guide rod with the maximum diameter and is matched with the groove guide rail of the guide rod with the maximum diameter through the boss. The other end of the guide rod with the minimum diameter penetrates through the middle-stage guide rod and is connected with the guide structure through threads. The other end of the guide rod with the largest diameter is connected with the first flange plate through threads.
The working process of the gas supply pipeline comprises the following steps:
the first flange is connected with a working site (such as a cylindrical combustion chamber) through bolts or other methods, so that the whole telescopic pipeline is stably fixed on the working site. The thread engagement degree of the support rod and the guide structure is adjusted, so that the round wheel at the non-thread end of the support rod is in contact with a working site (such as a cylindrical combustion chamber), and the whole telescopic pipeline is supported.
And a port at one end of the outermost pipeline connected with the second flange plate is communicated with an air source, so that required air enters the telescopic pipeline from the port. And the port at one end of the innermost pipeline connected with the guide structure is connected with the combustor. The frequency modulation motor is started, the rotating number of turns or time required by the frequency modulation motor is determined according to the distance required to move by the telescopic pipeline in the experimental process, the outermost pipeline is driven to rotate through the first gear and the second gear, and the middle-stage pipeline and the innermost pipeline are further driven to axially move in a screw thread matching mode, so that the telescopic adjustment of the whole telescopic pipeline is realized, and finally the adjustment of the position of a heat source is realized.
Advantageous effects
Compared with the prior art, the invention has the following characteristics:
(1) the telescopic pipeline can be controlled on one side, continuous extension and shortening of the pipeline are realized in a limited space, and the structure is simple;
(2) the telescopic pipeline can realize telescopic at different speeds and quick stop switching, and the function switching is quick;
(3) the telescopic pipeline is in threaded transmission through the lead screw, and the telescopic feeding is accurate and reliable;
(4) the telescopic pipeline has good sealing performance and is suitable for operation and use in a high-pressure environment;
(5) the processing and manufacturing cost is low, the device can be simply modified, and the device is suitable for telescopic environments with different lengths;
(6) the invention has simple structure, stable operation and convenient maintenance, and can be suitable for working environments with different depths, lengths and spaces by simple modification, thereby saving investment.
Drawings
FIG. 1 is a schematic cross-sectional view of an assembly of a unitary structure according to an embodiment;
FIG. 2 is a top view of an assembly of the overall structure in an embodiment;
fig. 3 is a front view of the outermost pipe 1 in the embodiment;
fig. 4 is a cross-sectional view of the outermost pipe 1 in the embodiment;
fig. 5 is a left side view of the outermost tube 1 in the embodiment;
FIG. 6 is a cross-sectional view of an intermediate stage conduit 2 in an embodiment;
fig. 7 is a sectional view of the innermost pipe 3 in the embodiment;
FIG. 8 is a cross-sectional view of a maximum diameter guide rod 9 in an embodiment;
FIG. 9 is a cross-sectional view of a mid-stage guide rod 8 in an embodiment;
FIG. 10 is a cross-sectional view of a minimum diameter guide rod 7 in an embodiment;
FIG. 11 is a front view of a bearing cap in accordance with an embodiment;
FIG. 12 is a cross-sectional view of a bearing end cap in an embodiment;
FIG. 13 is a front view of the first flange 13 in accordance with an embodiment;
FIG. 14 is a cross-sectional view of the first flange 13 in an embodiment;
FIG. 15 is a schematic view of a support system according to an embodiment, including a guide structure 4 and a support rod 5;
FIG. 16 is a front view of the motor mount 12 in accordance with an embodiment;
FIG. 17 is a left side view of the motor mount 12 of the preferred embodiment;
FIG. 18 is a schematic diagram of the relationship between the stages of piping in an exemplary embodiment;
FIG. 19 is a schematic view of the guide rods of each stage in accordance with one embodiment;
FIG. 20 is a cross-sectional view of the guide rod mating relationship of the stages in an embodiment.
The method comprises the following steps of 1-outermost pipeline, 2-middle-stage pipeline, 3-innermost pipeline, 4-guide structure, 5-support rod, 6-sleeve, 7-minimum diameter guide rod, 8-middle-stage guide rod, 9-maximum diameter guide rod, 10-second gear, 11-frequency modulation motor, 12-motor base, 13-first flange plate, 14-first gear, 15-first bearing end cover, 16-second bearing end cover, 17-fixing rod, 18-bearing end cover first sealing ring, 19-bearing end cover second sealing ring, 20-pipeline first sealing ring, 21-pipeline second sealing ring, 22-first cylindrical roller bearing, 23-second cylindrical roller bearing and 24-second flange plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
A telescopic gas supply pipeline for a slender combustion chamber is structurally shown in figure 1 and comprises an outermost pipeline 1, a middle-stage pipeline 2, an innermost pipeline 3, a guide structure 4, a support rod 5, a sleeve 6, a minimum-diameter guide rod 7, a middle-stage guide rod 8, a maximum-diameter guide rod 9, a second gear 10, a frequency modulation motor 11, a motor base 12, a first flange plate 13, a first gear 14, a first bearing end cover 15, a second bearing end cover 16, a fixing rod 17, a first bearing end cover sealing ring 18, a second bearing end cover sealing ring 19, a first pipeline sealing ring 20, a second pipeline sealing ring 21, a first cylindrical roller bearing 22, a second cylindrical roller bearing 23 and a second flange plate 24. Fig. 2 is a top view of the overall structure of the pipe.
Among the outermost pipe 1, the middle-stage pipe 2, and the innermost pipe 3, the outermost pipe 1 has the largest diameter, and the innermost pipe 3 has the smallest diameter. The three parts are mutually connected and matched to form a telescopic air supply channel structure.
As shown in fig. 3 and 4, at one end of the outermost pipe 1, the inner diameter of the port is smaller than that of the rest of the pipe, and the inner diameter surface of the port is provided with threads. A collar and two shoulders are arranged in a step shape in the middle of the outer surface of the outermost pipeline 1. On the outer surface of the other end of the outermost pipe 1, near the port, a collar and a shoulder are provided.
As shown in fig. 5 and 6, at one end of the middle stage pipe 2, the inner diameter at the port is smaller than that of the other part of the pipe, and the inner diameter surface of the port is provided with threads. The outer diameter of the port at the other end of the pipeline is larger than the outer diameter of other parts of the pipeline, a circle of groove is arranged on the outer surface of the outer diameter of the port, the outer surface of the port is not threaded, and threads are arranged on the outer surfaces of other parts of the pipeline. The number of the intermediate-stage pipelines 2 is selected according to the experiment requirement, and the pore size of the pipelines is adjusted correspondingly.
As shown in fig. 7, at one end of the innermost pipe 3, the outer diameter at the port is larger than the outer diameter of the rest of the pipe, a ring of grooves is provided on the outer surface of the outer diameter of the port, and the outer surface at the port is unthreaded. The outer surface of the port at the other end of the pipeline is provided with threads, and the outer surface of the middle part of the pipeline body is provided with threads. The outer surface of the pipe body between the two sections of threads is not threaded.
The guide rods comprise a maximum diameter guide rod 9, a middle-stage guide rod 8 and a minimum diameter guide rod 7.
As shown in fig. 8, the maximum diameter guide rod 9 is a hollow cylinder, and the outer surface of one end port thereof is provided with an external thread. The inner surface of the other end port of the guide rod is not provided with a groove guide rail, and the inner surface of the other part of the guide rod is provided with a groove guide rail (such as a cross groove).
As shown in fig. 9, the middle-stage guide rod 8 is a hollow cylinder, and a boss (e.g., a cross boss) is provided on the outer surface of the port at one end, and a guide rail having no groove is provided on the inner surface of the port at the other end. The inner surface of the other part of the guide rod is provided with a groove guide rail (such as a cross groove). The number of the middle-stage guide rods 8 can be selected according to experiment requirements, and the hole diameters of the guide rods can be adjusted correspondingly.
As shown in fig. 10, the guide rod 7 with the smallest diameter is a solid cylinder, and a boss (e.g., a cross boss) is provided on the outer surface of the port at one end, and a screw thread is provided on the outer surface of the port at the other end, and is connected with the guide structure 4 through the screw thread.
And the guide structure 4 is used for realizing synchronous axial movement of the pipeline and the guide rod, limiting the innermost pipeline 3 to be non-rotatable, and simultaneously supporting the whole pipeline to ensure that the deflection of the pipeline is very small and the transmission fit of the screw threads of the lead screw is not influenced. If the degree of expansion and contraction of the pipeline is large (the number of the intermediate-stage pipelines 2 is large), the number of the guide structures 4 can be increased according to the situation.
As shown in fig. 12, the bearing end caps include a first bearing end cap 15 and a second bearing end cap 16. All adopt the through type bearing end cover, the internal surface of bearing end cover is equipped with the round recess for lay the bearing end cover sealing washer, realize with outside pipeline 1 between sealed. And the size of the bearing end cover is determined according to the working requirement.
And the flanges comprise a first flange 13 and a second flange 24. The first flange 13 is of a stepped shape, and a boss with through holes (usually 4) is arranged in the middle of a circular surface on one side of the first flange, and a convex ring is arranged on the inner surface of the middle of a circular surface on the other side of the first flange and used for positioning the cylindrical roller bearing. Meanwhile, the outer edge side of the circular boss of the first flange 13 is provided with internal screw through holes which are symmetrical to each other, and as shown in fig. 13, the guide rod 9 of the maximum diameter is fixed on the first flange 13 through the internal screw through holes. The second flange 24 has the same structure and different size as the first flange 13, but has no through hole with internal thread on its circular surface.
The cylindrical roller bearings comprise a first cylindrical roller bearing 22 and a second cylindrical roller bearing 23, standard cylindrical roller bearings are adopted, and parameters such as the inner diameter and the width of the bearings are determined according to working requirements.
The fixing rod 17 is a cylinder with threads at two ends, and the first flange 13 and the second flange 24 are connected and positioned through nuts.
The support bar 5, together with the guide structure 4, forms a support system, as shown in fig. 15. The main body of the support rod 5 is a cylinder, one end of the support rod is connected with the guide structure 4 through threads, and the height of the whole support system is changed by changing the thread meshing degree. The other end is connected with the round wheel, so that the whole supporting system can move flexibly and conveniently by rolling the round wheel.
The second gear 10 and the first gear 14 are standard spur gears, and parameters such as module, tooth number, inner hole size, key groove size, tooth width and the like are determined according to working requirements.
The frequency modulation motor 11 is connected to the motor base 12, and the motor shaft is directly connected with the second gear 10 in a key fit mode for transmission, so that the frequency modulation motor is simple and reliable.
As shown in fig. 16, the motor base 12 is a flat plate as a whole, the middle of the flat plate is provided with a plurality of round holes (4 in this embodiment) for installing and positioning bolts for the motor, and bosses with through holes are arranged at four corners of the flat plate, so that the fixing rod 17 can pass through the bosses to fix the motor base 12 between the first flange 13 and the second flange 24.
The sizes of the first pipeline sealing ring 20, the second pipeline sealing ring 21, the first bearing end cover sealing ring 18 and the second bearing end cover sealing ring 19 are determined according to the sizes of the corresponding pipeline and the corresponding bearing end cover respectively, and standard O-shaped sealing rings can be specifically adopted.
The connection relationship of the components is as follows:
at the collar at the middle position of the outermost pipe 1, a first gear 14, a sleeve 6, a first flange 13, a second cylindrical roller bearing 23 and a second bearing end cap 16 are mounted in this order. Wherein the first gear 14 is connected with the outermost pipe 1 by key fit, the collar and the sleeve 6 therein play a role of axial positioning of the first gear 14, and the second bearing end cap 16 is connected with the first flange 13 by bolts and plays a role of fixing and positioning the second cylindrical roller bearing 23. In the groove of the inner surface of the second bearing end cap 16, a bearing end cap first seal ring 18 is installed to seal between the second bearing end cap 16 and the outermost pipeline 1.
At the shoulder of the outermost pipe 1 on the end side, a second flange 24, a first cylindrical roller bearing 22 and a first bearing end cap 15 are mounted in this order. The first bearing cover 15 is connected to the second flange 24 by bolts, and serves to fix and position the first cylindrical roller bearing 22. At the groove of the inner surface of the first bearing end cap 15, a bearing end cap second seal ring 19 is installed to seal between the first bearing end cap 15 and the outermost pipeline 1.
The first flange 13 and the second flange 24 are connected by a plurality of fixing rods 17. At least two fixing rods 17 pass through corresponding round holes on the motor base 12 when being connected, and the motor base 12 is fixed on the fixing rods 17. Meanwhile, the second gear 10 is meshed with the first gear 14, so that the power of the frequency modulation motor 11 is transmitted to the outermost pipeline 1 through the first flange plate 13 and the second gear 10.
As shown in fig. 18, the pipe first seal ring 20 is installed in the groove of the intermediate-stage pipe 2. Similarly, the pipe second seal 21 is fitted in the groove of the innermost pipe 3. The innermost pipe 3 is screwed into the middle-stage pipe 2, and the middle-stage pipe 2 is screwed into the outermost pipe 1. The end side of the innermost pipe 3 is connected with a guide structure 4 through threads, and the guide structure 4 is connected with two support rods 5 through threads to form a support system. The height of the supporting system is changed by adjusting the threaded engagement degree of the supporting rod 5 and the guide structure 4, so that the supporting system is suitable for different working condition environments. Furthermore, the non-threaded end of the support rod 5 is provided with a round wheel which is in contact with the combustion chamber, so that the support system can move flexibly.
As shown in fig. 19, the guide rod 7 with the smallest diameter is sleeved in the guide rod 8 of the middle stage and is matched with the groove guide rail of the guide rod 8 of the middle stage through a boss. The middle-stage guide rod 8 is sleeved in the maximum-diameter guide rod 9 and is matched with the groove guide rail of the maximum-diameter guide rod 9 through a boss. The other end of the minimum diameter guide rod 7 passes through the middle stage guide rod 8 and is connected with the guide structure 4 by a screw thread. The other end of the maximum diameter guide rod 9 is connected with a first flange 13 through threads.
The working process of the gas supply pipeline comprises the following steps:
the first flange 13 is bolted or otherwise attached to the work site (e.g., a cylindrical combustion chamber) to secure the entire extension duct to the work site. The height of the supporting system is changed by adjusting the thread meshing degree of the supporting rod and the guiding structure, so that the supporting system is suitable for different working condition environments, the round wheel of the non-threaded end of the supporting rod 5 is in contact with a working site (such as a cylindrical combustion chamber), and the whole telescopic pipeline is supported.
And a port at one end of the outermost pipeline 1 connected with the second flange plate 24 is communicated with a gas source, so that required gas enters the telescopic pipeline from the port. At the end of the innermost pipe 3, which is connected to the guide structure 4, is connected a burner. The frequency modulation motor 11 is started, the number of turns or the time of rotation required by the frequency modulation motor 11 is determined according to the distance required by the telescopic pipeline to move in the experimental process, the outermost pipeline 1 is driven to rotate through the first gear 14 and the second gear 10, and the intermediate pipeline 2 and the innermost pipeline 3 are further driven to axially move through a screw thread matching mode, so that the telescopic adjustment of the whole telescopic pipeline is realized, and finally the adjustment of the position of a heat source is realized.
The above description is further intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above description is only an illustrative embodiment of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A telescopic gas supply pipeline for a slender combustion chamber is characterized by comprising an outermost pipeline (1), a middle-stage pipeline (2), an innermost pipeline (3), a guide structure (4), a support rod (5), a sleeve (6), a minimum-diameter guide rod (7), a middle-stage guide rod (8), a maximum-diameter guide rod (9), a second gear (10), a frequency modulation motor (11), a motor base (12), a first flange plate (13), a first gear (14), a first bearing end cover (15), a second bearing end cover (16), a fixing rod (17), a first bearing end cover seal (18), a second bearing end cover seal ring (19), a first pipeline seal ring (20), a second pipeline seal ring (21), a first cylindrical bearing (22), a second cylindrical roller bearing (23) and a second flange plate (24);
among the outermost pipeline (1), the middle-stage pipeline (2) and the innermost pipeline (3), the outermost pipeline (1) has the largest diameter, and the innermost pipeline (3) has the smallest diameter; the three parts are mutually connected and matched to form a telescopic air supply channel structure;
at one end of the outermost pipeline (1), the inner diameter of the port is smaller than that of other parts of the pipeline, and the surface of the inner diameter of the port is provided with threads; a shaft collar and two shaft shoulders are arranged in a step shape in the middle of the outer surface of the outermost pipeline (1); a shaft collar and a shaft shoulder are arranged on the outer surface of the other end of the outermost pipeline (1) close to the port;
at one end of the middle-stage pipeline (2), the inner diameter of the port is smaller than that of other parts of the pipeline, and the surface of the inner diameter of the port is provided with threads; the outer diameter of the port at the other end of the middle-stage pipeline (2) is larger than the outer diameters of other parts of the pipeline, a circle of groove is arranged on the outer surface of the outer diameter of the port, the outer surface of the port is not provided with threads, and the outer surfaces of the other parts of the pipeline are provided with threads;
at one end of the innermost pipeline (3), the outer diameter of the port is larger than the outer diameter of other parts of the pipeline, a circle of groove is arranged on the outer surface of the outer diameter of the port, and the outer surface of the port is not threaded; the outer surface of the port of the other end of the innermost pipeline (3) is provided with threads, and the outer surface of the middle part of the pipeline body is provided with threads; the outer surface of the pipe body between the two sections of threads is not provided with threads;
the maximum diameter guide rod (9) is a hollow cylinder, and the outer surface of one end port of the guide rod is provided with an external thread; the inner surface of the port at the other end of the guide rod is not provided with a groove guide rail, and the inner surface of the other part of the guide rod is provided with a groove guide rail;
the middle-stage guide rod (8) is a hollow cylinder, the outer surface of one end port of the middle-stage guide rod is provided with a boss, and the inner surface of the other end port of the middle-stage guide rod is provided with a guide rail without a groove; the inner surface of the other part of the guide rod is provided with a groove guide rail;
the guide rod (7) with the minimum diameter is a solid cylinder, a boss is arranged on the outer surface of the port at one end of the guide rod, a thread is arranged on the outer surface of the port at the other end of the guide rod, and the guide rod is connected with the guide structure (4) through the thread;
the guide structure (4) is used for realizing synchronous axial movement of the pipeline and the guide rod, limiting the innermost pipeline (3) from rotating, and simultaneously supporting the whole pipeline to ensure that the deflection of the pipeline is small and the transmission fit of the screw threads of the lead screw is not influenced;
the first bearing end cover (15) and the second bearing end cover (16) both adopt a through type bearing end cover, and the inner surfaces of the two bearing end covers are provided with a circle of grooves for placing bearing end cover sealing rings to realize sealing with the outermost pipeline (1); the size of the bearing end cover is determined according to the working requirement;
the first flange (13) is in a step shape, the middle part of the round surface at one side of the first flange is provided with a boss with a through hole, and the inner surface of the middle part of the round surface at the other side of the first flange is provided with a convex ring for positioning the cylindrical roller bearing; meanwhile, the outer edge side of the circular boss of the first flange plate (13) is provided with symmetrical internal thread through holes, and the guide rod (9) with the maximum diameter is fixed on the first flange plate (13) through the internal thread through holes; the structure of the second flange plate (24) is the same as that of the first flange plate (13), and the size of the second flange plate is different from that of the first flange plate, but the circular surface of the second flange plate (24) is not provided with an internal thread through hole;
the first cylindrical roller bearing (22) and the second cylindrical roller bearing (23) both adopt standard cylindrical roller bearings, and parameters such as the inner diameter and the width of the bearings are determined according to working requirements;
the fixing rod (17) is a cylinder with threads at two ends, and the first flange plate (13) and the second flange plate (24) are connected and positioned through nuts;
the supporting rod (5) and the guide structure (4) jointly form a supporting system; the main body of the support rod (5) is a cylinder, one end of the support rod is connected with the guide structure (4) through threads, and the height of the whole support system is changed by changing the meshing degree of the threads;
the second gear (10) and the first gear (14) both adopt standard spur gears, and parameters such as modulus, tooth number, inner hole size, key groove size, tooth width and the like are determined according to working requirements;
the frequency modulation motor (11) is connected to the motor base (12), and a motor shaft of the frequency modulation motor is directly connected with the second gear (10) in a key fit manner to perform transmission;
the motor base (12) is fixed between the first flange plate (13) and the second flange plate (24) through a fixing rod (17);
the sizes of the first pipeline sealing ring (20), the second pipeline sealing ring (21), the first bearing end cover sealing ring (18) and the second bearing end cover sealing ring (19) are respectively determined according to the sizes of the corresponding pipeline and the corresponding bearing end cover;
the connection relationship of the components is as follows:
a first gear (14), a sleeve (6), a first flange plate (13), a second cylindrical roller bearing (23) and a second bearing end cover (16) are sequentially arranged at a shaft ring in the middle of the outermost pipeline (1); the first gear (14) is connected with the outermost pipeline (1) in a key fit mode, the collar and the sleeve (6) play a role in axially positioning the first gear (14), and the second bearing end cover (16) is connected with the first flange plate (13) through bolts and plays a role in fixing and positioning the second cylindrical roller bearing (23); a bearing end cover first sealing ring (18) is arranged at the groove of the inner surface of the second bearing end cover (16) to realize the sealing between the second bearing end cover (16) and the outermost pipeline (1);
a second flange plate (24), a first cylindrical roller bearing (22) and a first bearing end cover (15) are sequentially arranged at the shaft shoulder at the end side of the outermost pipeline (1); the first bearing end cover (15) is connected with the second flange plate (24) through bolts and plays a role in fixing and positioning the first cylindrical roller bearing (22); a bearing end cover second sealing ring (19) is arranged at a groove on the inner surface of the first bearing end cover (15) to realize the sealing between the first bearing end cover (15) and the outermost pipeline (1);
the first flange plate (13) and the second flange plate (24) are connected through a plurality of fixing rods (17); wherein at least two fixing rods (17) pass through corresponding round holes on the motor base (12) when being connected, and the motor base (12) is fixed on the fixing rods (17); meanwhile, the second gear (10) is meshed and matched with the first gear (14), so that the power of the frequency modulation motor (11) is transmitted to the outermost pipeline (1) through the first flange plate (13) and the second gear (10);
installing a first seal ring (20) of the pipeline in a groove of the middle-stage pipeline (2); similarly, the second sealing ring (21) of the pipeline is arranged in the groove of the innermost pipeline (3); screwing the innermost pipeline (3) into the middle-stage pipeline (2) through threads, and screwing the middle-stage pipeline (2) into the outermost pipeline (1) through threads; the end side of the innermost pipeline (3) is connected with a guide structure (4) through threads, and the guide structure (4) is connected with two support rods (5) through threads to form a support system; the height of the supporting system is changed by adjusting the thread engagement degree of the supporting rod (5) and the guide structure (4), so that the supporting system is suitable for different working condition environments;
the guide rod (7) with the minimum diameter is sleeved in the middle-stage guide rod (8) and is matched with the groove guide rail of the middle-stage guide rod (8) through a boss; sleeving the middle-stage guide rod (8) into the maximum-diameter guide rod (9), and matching the middle-stage guide rod with the groove guide rail of the maximum-diameter guide rod (9) through a boss; the other end of the guide rod (7) with the minimum diameter penetrates through the middle-stage guide rod (8) and is connected with the guide structure (4) through threads; the other end of the guide rod (9) with the largest diameter is connected with a first flange plate (13) through threads;
the working process of the pipeline is as follows:
connecting the first flange (13) with a working site to ensure that the whole telescopic pipeline is stably fixed on the working site;
the port of one end of the outermost pipeline (1) connected with the second flange plate (24) is communicated with an air source, so that required air enters the telescopic pipeline from the port; the port of one end of the innermost pipeline (3) connected with the guide structure (4) is connected with a burner; open frequency modulation motor (11), according to the experimentation, the distance that flexible pipeline need remove, confirm the pivoted number of turns or the time that frequency modulation motor (11) need, through first gear (14), second gear (10), drive outside pipeline (1) and rotate, through lead screw thread fit, further drive intermediate level pipeline (2) and innermost pipeline (3) and realize axial displacement, thereby realize the flexible adjustment of whole flexible pipeline, realize the adjustment of heat source position at last.
2. Telescopic gas supply duct for elongated combustors, as claimed in claim 1, characterized in that the number of said intermediate stage ducts (2) and guide structures (4) is chosen according to the experimental requirements.
3. Telescopic gas supply duct for elongated combustors according to claim 1 characterized in that the number of the intermediate stage guides (8) is chosen according to the experimental requirements.
4. A telescopic gas supply duct for elongated combustors according to claim 1 characterized in that the grooved rail of the inner surface of the guide rod (9) of maximum diameter is a cross grooved rail; the boss on the outer surface of the middle-stage guide rod (8) is a cross boss, and the groove guide rail on the inner surface is a cross groove guide rail; the boss on the outer surface of the guide rod (7) with the smallest diameter is a cross boss.
5. A telescopic gas supply duct for elongated combustors as claimed in claim 1, characterized in that the support bar (5) has a round wheel attached to one end, so that the whole support system is moved by the rolling of the round wheel.
6. The telescopic gas supply duct for elongated combustors as claimed in claim 1, wherein the motor base (12) is a flat plate with a plurality of holes in the middle for mounting bolts for the motor, and bosses with through holes for the passage of the fixing rods (17) are provided at the four corners of the flat plate.
7. A telescopic gas supply duct for elongated combustors, as claimed in claim 1, characterized in that the first duct seal (20), the second duct seal (21), the first bearing cap seal (18), and the second bearing cap seal (19) are standard O-rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910610524.5A CN110319453B (en) | 2019-07-08 | 2019-07-08 | Telescopic gas supply pipeline for slender combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910610524.5A CN110319453B (en) | 2019-07-08 | 2019-07-08 | Telescopic gas supply pipeline for slender combustion chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110319453A CN110319453A (en) | 2019-10-11 |
| CN110319453B true CN110319453B (en) | 2020-05-12 |
Family
ID=68123085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910610524.5A Active CN110319453B (en) | 2019-07-08 | 2019-07-08 | Telescopic gas supply pipeline for slender combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110319453B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543984B (en) * | 2022-04-22 | 2022-07-05 | 北京航空航天大学 | Quantitative adjusting device and method for Rijke pipe boundary dissipation |
| CN115493143A (en) * | 2022-09-13 | 2022-12-20 | 北京泷涛环境科技有限公司 | Ultralow-nitrogen combustion device of natural gas boiler and use method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3559693A (en) * | 1967-05-05 | 1971-02-02 | Inst Francais Du Petrole | Windable flexible shaft capable of withstanding high tractive forces and torsional stresses |
| US7405361B1 (en) * | 2002-02-26 | 2008-07-29 | Electrolock, Inc. | Nested insulating tube assembly for a coil lead |
| CN102494095A (en) * | 2011-11-18 | 2012-06-13 | 北京工业大学 | Waterproof multistage retractable rod |
| CN203909455U (en) * | 2014-07-03 | 2014-10-29 | 哈尔滨鑫时空科技有限公司 | Electric type multi-section synchronous stretch and contraction rocker arm |
| CN205514697U (en) * | 2016-02-03 | 2016-08-31 | 北京积水潭医院 | A sleeve pjncture needle for computer navigation operation |
| CN107825460A (en) * | 2017-11-01 | 2018-03-23 | 浙江海洋大学 | A kind of concertina type composite machine arm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012137246A1 (en) * | 2011-04-04 | 2012-10-11 | 独立行政法人産業技術総合研究所 | Emergency rescue jack |
-
2019
- 2019-07-08 CN CN201910610524.5A patent/CN110319453B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3559693A (en) * | 1967-05-05 | 1971-02-02 | Inst Francais Du Petrole | Windable flexible shaft capable of withstanding high tractive forces and torsional stresses |
| US7405361B1 (en) * | 2002-02-26 | 2008-07-29 | Electrolock, Inc. | Nested insulating tube assembly for a coil lead |
| CN102494095A (en) * | 2011-11-18 | 2012-06-13 | 北京工业大学 | Waterproof multistage retractable rod |
| CN203909455U (en) * | 2014-07-03 | 2014-10-29 | 哈尔滨鑫时空科技有限公司 | Electric type multi-section synchronous stretch and contraction rocker arm |
| CN205514697U (en) * | 2016-02-03 | 2016-08-31 | 北京积水潭医院 | A sleeve pjncture needle for computer navigation operation |
| CN107825460A (en) * | 2017-11-01 | 2018-03-23 | 浙江海洋大学 | A kind of concertina type composite machine arm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110319453A (en) | 2019-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110319453B (en) | Telescopic gas supply pipeline for slender combustion chamber | |
| JP6816968B2 (en) | Systems and methods for tuning resonators | |
| US20160003162A1 (en) | Damping device for a gas turbine, gas turbine and method for damping thermoacoustic oscillations | |
| US2359108A (en) | Power generator | |
| BRPI0914905B1 (en) | combustion chamber of a gas turbine engine comprising at least one deflector | |
| US11536455B2 (en) | Combustor component, combustor, gas turbine, and manufacturing method for combustor component | |
| CN101737803A (en) | Fuel nozzle assembly for use with a gas turbine engine and method of assembling same | |
| JP2019090599A (en) | Fluid pressure balanced type two-stage injection nozzle with built-in drive motor and two-row gas refrigerator | |
| US11131216B2 (en) | Support unit for power unit, and turbine having the same | |
| CN104197144A (en) | Special expansion joint for pulverized coal guide | |
| US20200018350A1 (en) | Oil supply system for fluid film damper | |
| CN111043626B (en) | Nozzle, combustion chamber and gas turbine | |
| CN104213981A (en) | Novel minisize gas turbine | |
| CN106014648B (en) | Integrated dual-fuel delivery system | |
| CN109701791B (en) | Structure capable of adjusting nozzle position of ejector | |
| CN112211744A (en) | Cooling energy conversion aerospace engine | |
| CN218095929U (en) | Combustor convenient to dismouting | |
| KR102608433B1 (en) | Nozzle for combustor to reduce combustion vibration and gas turbine including the same | |
| CN211305450U (en) | Turbo generator spring unit top stretches device | |
| CN220957347U (en) | Pipeline installation structure | |
| CN109099461B (en) | Combustion chamber head device, combustion chamber and gas turbine | |
| CN219866877U (en) | Muffler for refrigerator | |
| CN220792405U (en) | Coupling mechanism of exhaust gas purification case and gas-supply pipe | |
| RU2493494C1 (en) | Gas turbine engine combustion chamber | |
| CN210069814U (en) | Gas boiler with expansion joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |