39 results about "Plug nozzle" patented technology

The utility model provides a pressurization regulating valve and a moka kettle. The pressurization adjusting valve comprises a valve element, a valve bonnet, a pressing and blocking spring and an elastic pressurization plug nozzle. A liquid conveying flow channel is formed in the valve element. The valve bonnet covers the liquid outlet end of the liquid conveying flow channel, and an overflow gap is formed between the valve bonnet and the valve element. The elastic pressurizing plug nozzle is arranged in the liquid conveying flow channel and used for abutting against the peripheral wall of the guiding-out opening of the liquid guiding column. A pressure regulating middle cavity is formed between the valve cap and the elastic pressurizing plug nozzle; a liquid outlet of the elastic pressurizing plug nozzle is communicated with the overflow gap through the pressure regulating middle cavity; the pressing and blocking spring is arranged in the pressure regulating middle cavity; the valve bonnet is connected to the valve element in a threaded mode, the pressing and blocking spring abuts against the liquid outlet of the elastic pressurizing plug nozzle to close the liquid outlet of the elastic pressurizing plug nozzle, the pressure of the pressing and blocking spring on the liquid outlet of the elastic pressurizing plug nozzle is adjusted by twisting the valve bonnet, then the closing strength of the liquid outlet of the elastic pressurizing plug nozzle can be rapidly changed, and flowing coffee liquid can achieve different pressurizing effects.

The invention relates to a gas vane thrust vectoring device servo driving scheme of a plug nozzle engine, which is specifically divided into a gas vane, a fixing device of the gas vane and an integrated electro-hydraulic servo control system, so that the gas vane is fixed on the surface of a plug cone, and the gas vane can be controlled to act at a specified angle according to requirements. In order to enable the gas vanes to generate large axial force and to have small axial loss at the same time, the gas vanes are evenly arranged at the 50% length position of the plug cone in the circumferential direction. In order to solve the problems of feasibility and reliability of axial fastening of the gas rudder shaft on the curved surface of the plug cone, a split type design and dual-bearing fastening are used. In order to guarantee the transmission rotation stability and accuracy of the gas vane, a servo motor is used for driving a hydraulic cylinder, and a double-rocker mechanism is formed to achieve driving. In order to ensure the flexibility and reliability of the thrust vector of the engine, a unit integrated electro-hydraulic servo system is adopted, so that each gas vane can independently realize vector control. The invention has the advantages of high structural reliability, high control accuracy and high vector maneuverability.

A propulsion unit includes a gas turbine engine and an exhaust nozzle coupled to an aft end of the gas turbine engine. The exhaust nozzle is configured to interact with exhaust gases exiting the gas turbine engine in an aft direction. The exhaust nozzle includes an outer nozzle case and an inner plug that cooperate to define an exhaust flow path therebetween. The exhaust nozzle is configured to manipulate the exhaust gases to provide different thrust capabilities for the gas turbine engine.

The utility model provides a concrete small hole plugging gun which comprises a slurry pipe barrel and a gun rack. Wherein the slurry pipe barrel comprises a barrel body and a plugging nozzle; the two ends of the barrel are of an open structure, one end of the barrel is used for being filled with concrete slurry and connected with the plugging nozzle, and the other end of the barrel is connected with the gun rack. The gun rack comprises a handle, a pipe barrel groove, a force return device and a push rod; the handle drives the push rod to move in the direction of the pipe barrel groove. The return device is used for fixing the position of the push rod; a rubber plug is arranged at the end, close to the pipe barrel groove, of the push rod. And the rubber plug is movably connected with the slurry pipe barrel. By the adoption of the concrete small hole plugging gun, labor is saved, the discharge amount of slurry can be effectively controlled, waste of raw materials is avoided, labor of workers is effectively saved, and plugging quality and plugging efficiency are improved.

1. The name of the design product: bottle neck silica gel ring. 2. The use of the design product: used for bottle neck connecting ring, connecting bottle neck and bottle plug nozzle and other accessories. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

A plug-type vector nozzle structure for a solid rocket engine, which is used to solve the problems existing in the thrust vector control of plug nozzles. The existing plug nozzle structures and forms are all aimed at aeroengines or liquid rocket engines, without considering the application situation on solid rocket engines and are not applicable to the technical problems of solid rocket engines. The plug-type vector nozzle includes a plug cone, a ring throat shroud, and a combustion chamber, which realizes the adjustment of the nozzle profile inside the plug nozzle to achieve the purpose of thrust vector control. It has a simple structure, high reliability, a wide working range, high nozzle efficiency, a large lateral force, and a strong deflection ability.

The present invention belongs to the technical field of aircraft engine exhaust systems, and in particular, is a plug-type nozzle air film cooling enhancement device based on the Coanda effect. The plug cone of the binary plug-type nozzle is located in the nozzle, which makes the plug cone temperature very high. In order to protect the plug cone and improve the stealth capability, the plug cone must be cooled. The traditional air film cooling structure cannot avoid the separation of the cooling airflow downstream of the air film groove and the wall surface, resulting in low air film cooling efficiency. The following scheme is proposed, including a binary nozzle, the front section of the binary nozzle is a circular square section, the rear section is a binary section, a plug cone is arranged in the binary section, and the upper and lower sides of the plug cone are both provided with air film grooves and bosses, and the bosses are located downstream of the outlet of the air film groove. The present invention discloses a plug-type nozzle air film cooling enhancement device based on the Coanda effect, which suppresses the separation of the cooling airflow through the Coanda effect generated when the airflow flows through the boss, and can improve the air film cooling efficiency under the same cooling air flow rate.

The utility model provides a radiator sealing test device and a radiator production and processing system. The radiator sealing test device comprises a machine table; the fixing mechanism comprises a product connecting plate; the testing mechanism comprises a sealing air guide assembly, a pressure-maintaining air inlet connector, a plugging connector and a leak detector, the leak detector is externally connected with air supply equipment and is communicated with the pressure-maintaining air inlet connector through the sealing air guide assembly, the pressure-maintaining air inlet connector comprises a first connector body and an air supply nozzle, the air supply nozzle can be communicated with the air inlet end of the radiator to be detected, and the plugging connector is connected with the sealing air guide assembly; the plugging connector comprises a second connector body and a plugging nozzle which are connected with each other. The plugging nozzle can plug the air outlet end of the radiator to be detected. According to the utility model, pressure-maintaining air tightness detection can be carried out on the radiator in a sealed state, and compared with a conventional bubble detection method in the industry at the present stage, the pressure-maintaining air tightness detection device has the advantages of high detection precision, wide application range, high detection efficiency, strong compatibility and the like, and has a wide application prospect in the industry.

The application provides a rotary detonation vector propulsion device based on inner column swing, which comprises a driving rod, a movable combustion chamber inner column, a combustion chamber head and a tail nozzle. The movable combustion chamber inner column comprises a movable combustion chamber inner column front end spherical surface and a movable combustion chamber inner column rear end cylinder; the combustion chamber head comprises an injection structure, a combustion chamber head straight ring plate, a combustion chamber head curved ring plate, a high-temperature-resistant sealing ring and a cooling channel; the tail nozzle is a plug nozzle, which comprises a plug nozzle outer ring and a plug nozzle center cone. The case or the parts fixed on the case are connected with the driving rod front end through a rotary pair, the driving rod rear end is connected with the inside of the movable combustion chamber inner column front end spherical surface through a rotary pair, and the movable combustion chamber inner column front end spherical surface outer wall is matched with the inner wall of the combustion chamber head curved ring plate through a spherical pair. When the device works, the two rotary pairs are respectively driven to rotate by the motor at a certain angular velocity, so that the movable combustion chamber inner column swings and deflects, the rotary detonation wave intensity in the combustion chamber and the gas flow are uneven, and thus the rotary detonation engine generates a vector thrust. The application can be used in the fields of rotary detonation vector propulsion and the like.

The application relates to an additive printing tool head which comprises a mounting body, a first nozzle, a second nozzle and a wire channel; the mounting body is provided with a lifting mechanism, the first nozzle and the second nozzle; the lifting mechanism comprises a lifting motor; the lifting motor is mounted on the first side of the mounting body, and the lifting motor drives the first nozzle to lift; the tool head further comprises a plug nozzle mechanism which comprises a swing rod and a plug nozzle; one end of the swing rod is in transmission connection with the output shaft of the lifting motor, and the other end is provided with the plug nozzle; the plug nozzle is driven by the lifting motor to move and switch between the first nozzle and the second nozzle, so as to block the first nozzle or the second nozzle in a non-working state. The use of the plug nozzle mechanism can block the nozzle in the non-working state, thereby avoiding the accidental overflow of the wire, and improving the printing efficiency and effect.

The bionic hanging piece comprises a hook body with a containing area, and a bionic face part made of an elastic material is arranged on an opening plugging frame at the front end of the hook body in a matched mode. The bionic face comprises an upper abutting lip and a lower abutting lip which are in mirror symmetry, the lower abutting lip is located below the upper abutting lip, a gap between the upper abutting lip and the lower abutting lip is a plug nozzle, and the upper abutting lip and the lower abutting lip are provided with hollow arch backs capable of elastically moving. According to the towel hanging device, the corner end of a towel enters the containing area through the plug nozzle, the lower abutting lip and the upper abutting lip clamp the towel in the mode that the arch backs deform, bounce and abut against each other, and when the towel is pulled off, the arch backs are dragged to rebound and rapidly restore, so that the towel is firmly hung, and the towel is pulled off without damage and is convenient and fast to use. The problems that in the prior art, a colloidal sheet / strip with a plug hole cannot be restored to clamp a towel after being extruded and bent for a long time, and the tail end of the sheet / strip can accidentally clamp fingers are effectively solved. Meanwhile, the bionic hanging piece is vivid and high in decoration identifiability, the hook body can be used for containing objects, and application environments are diversified.

An exhaust nozzle includes an outer nozzle case having an outer surface and an inner surface, a nozzle plug, and a thrust reverser coupled to the outer nozzle case and including a first thrust reverser panel coupled to the outer nozzle case and an actuator system coupled with the first thrust reverser panel and configured to move the first thrust reverser panel between and including a stored configuration and a reverse-thrust configuration. In the stored configuration, the first thrust reverser panel and a portion of the actuator system provide a portion of an exterior surface of the exhaust nozzle.

The application relates to the technical field of lithium battery manufacturing equipment, and discloses an automatic suction nozzle feeding device, which comprises a base, a positioning unit, a transplanting unit, a feeding unit and a suction nozzle clamping module arranged on the base; the feeding unit comprises a vibrating disc, a direct-shaking feeder and a material taking table which are sequentially connected, and a material groove is sequentially connected between the direct-shaking feeder and the material taking table; the transplanting unit comprises a Y-direction moving module and a Z-direction moving module, the Z-direction moving module is in transmission connection with the suction nozzle clamping module; the suction nozzle clamping module comprises a mounting seat, a plurality of suction nozzle assemblies and an X-direction moving module, each suction nozzle assembly comprises a adapter plate and a clamping jaw, and the mounting seat is further provided with a driving unit for driving the clamping jaw to clamp or release the suction nozzle. Through cooperation of the structures, the suction nozzle can be accurately and automatically placed in a suction nozzle inserting tool, manual work only needs to store the suction nozzle in the vibrating disc, manual intervention and labor cost for placing the suction nozzle are reduced, and the automatic feeding function of the suction nozzle inserting tool is realized.

1. The name of the design product: quick plug nozzle (cleaning machine 1 / 4 type). 2. The use of the design product: for cleaning machine 1 / 4 quick plug nozzle. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses a passive pneumatic vector two-dimensional plug nozzle based on throat jet flow and a control method thereof.The nozzle comprises a nozzle barrel and a center plug cone, the top and the bottom of the center plug cone are each provided with an expansion face, the first end of each expansion face is a shrinkage wall face, the middle of each expansion face is a throat wall face, and the second end of each expansion face is an expansion wall face; the center plug cone is provided with bypass channels corresponding to the two expansion faces, inlets of the bypass channels are formed in the shrinkage wall faces of the corresponding expansion faces, and outlets of the bypass channels are formed in the throat wall faces of the corresponding expansion faces and face the nozzle throat. And a bypass control valve is arranged on the bypass channel. The thrust vectoring nozzle is applied to the field of aircraft control, control over the piston nozzle vector is achieved through the bypass channel and the bypass control valve, the thrust vector of the thrust vectoring nozzle comes from vector deflection of airflow and the pressure difference between the upper side wall face and the lower side wall face of the nozzle, the response speed is high, and the performance is obviously higher than that of a conventional mechanical thrust vectoring nozzle.

A propulsion unit includes a gas turbine engine and an exhaust nozzle coupled to an aft end of the gas turbine engine. The exhaust nozzle is configured to interact with exhaust gases exiting the gas turbine engine in an aft direction. The exhaust nozzle includes an outer nozzle case and an inner plug that cooperate to define an exhaust flow path therebetween. The exhaust nozzle is configured to manipulate the exhaust gases to provide different thrust capabilities for the gas turbine engine. The exhaust nozzle includes a thrust reverser configured to be retained by the inner plug.

The invention relates to a plug type nozzle steam ejector which comprises an ejector body, one end of the ejector body serves as a primary flow inlet end, the other end of the ejector body serves as a discharge end, the primary flow inlet end is provided with a primary flow inlet pipe communicated with a suction chamber of the ejector body, and the outlet end of the primary flow inlet pipe is connected with the inlet end of a nozzle. The nozzle and the ejector body are coaxially arranged, the suction chamber is further connected with a secondary inflow pipe, a nozzle plug is coaxially fixed in the nozzle and comprises a connecting part and a head part, the connecting part is fixed to the nozzle through a fixing piece, and the head part comprises an expansion section, an equal-area section and a contraction section which are sequentially arranged in the steam flowing direction. The expansion section corresponds to the contraction part of the inner surface of the end part of the nozzle, the equal-area section corresponds to the throat part of the inner surface of the end part of the nozzle, and the contraction section corresponds to the expansion part of the inner surface of the end part of the nozzle.

The utility model discloses an oil rail channel conduction detection device which comprises a lifting assembly, a top limiting assembly, an oil rail body, a detection plugging assembly and a pressurization assembly, the pressurization assembly is arranged at the center of the lifting assembly, and the oil rail body is arranged at the top of the pressurization assembly. The top limiting assemblies are arranged on the two sides of the top of the oil rail body, the lifting assembly comprises a base, an air cylinder, a workbench, a limiting sliding sleeve and a positioning rod, the pressurizing assembly comprises an air pump, a pressure tank and a plugging nozzle, and each top limiting assembly comprises a positioning seat, a limiting seat, a connecting rod, a first spring and a pressing plate. The conduction detection device of the oil rail channel has the advantages of being convenient to fix and good in foreign matter removing effect, and solves the problems that a detection device in the prior art is inconvenient to fix an oil rail, consequently, the detection time is long, and meanwhile blocked foreign matter cannot be removed through pressure.

An aerial vehicle engine is proposed which may be powered an adjustable, vortex-based virtual aerospike engine. The vehicle may also include a combustion chamber which may be coupled to the exit nozzle. The combustion chamber may include one or more gas inlets, one or more blanket inlets and one or more main inlets. The gas inlet may be configured to let in a column of gases into the combustion chamber in a direction parallel to the direction of the rocket with minimal angular velocity to prevent the column of gases from mixing with a vortex of propellants or gases. The one or more main inlets may be configured to spray fuel or oxidizer at a specific angle, where the angle may be adjustable for forming the vortex of propellants or gases. The one or more blanket inlets may be configured to spray fuel / oxidizer / (inert) coolant at a specific angle, where the angle may be adjustable and may or may form a vortex, a stagnant pocket of gases (acting as a blanket) or a stream of gases that exits through the exit nozzle. Further, the column of gases inside the combustion chamber leading up to the exit nozzle may form a virtual aerospike nozzle, the virtual aerospike nozzle may exit the gases to propel the vehicle, wherein the virtual aerospike nozzle may not require cooling.

The invention relates to a method for controlling a thrust vector of a solid plug nozzle by using a throat bolt, in particular to a control method for realizing the thrust vector of a plug nozzle engine by using the throat bolt to differentially adjust the thrust of an inner nozzle, which comprises a servo motor, the throat bolt, a unit combustion chamber, the inner nozzle and a plug cone. The device is characterized in that a servo actuating mechanism composed of a servo motor and a throat bolt is arranged at the tail end of the combustion chamber, and the throat bolt, the combustion chamber and the inner spray pipe are coaxially arranged; differential control is adopted for the servo actuation structure, the thrust of the inner spray pipe is adjusted by adjusting the expansion and contraction amount of the pintle, and the purpose of thrust vector control over the plug type spray pipe is achieved. Thrust vector adjustment of the plug type spray pipe is achieved through throat bolt differential control, damage of an actuating mechanism to the pneumatic shape of the plug type spray pipe can be effectively reduced, the flexibility of engine thrust vector control is greatly improved, the advantages of being rapid in response, remarkable in vector effect, simple in structure and the like are achieved, and the requirements for overall thermal protection and sealing of the plug type spray pipe are low.

The utility model belongs to the technical field of packaging bottles, and discloses a bottle with a breathable cap, which comprises a bottle, a plug nozzle, a support, a breathable film, an inner screw cap and an outer cap, the plug nozzle is sleeved in the bottle, the bottle is screwed with the inner screw cap, the periphery of the inner screw cap is fastened with the outer cap, the support is arranged between the inner screw cap and the plug nozzle, and the breathable film is arranged at the center of the upper end face of the support. The bottle comprises a bottle body, a bottle neck is arranged in the center of the upper end of the bottle body, an outer protruding rotating thread used for being in threaded connection with the inner screw cap is arranged on the outer side face of the bottle neck, and the bottle body is in threaded connection with the inner screw cap through the outer protruding rotating thread. The lower end of the side face of the inner wall of the inner screw cap is provided with an inner concave rotating thread used for being in threaded connection with the outer convex rotating thread, the inner screw cap is in threaded connection with the bottle through the inner concave rotating thread, the periphery of the outer wall of the inner screw cap is provided with a convex buckle ring used for being buckled with the outer cap, and the inner screw cap is buckled with the outer cap through the convex buckle ring. Appropriate exchange of gas inside and outside the bottle is achieved through the breathable film in the center of the upper end of the support, pressure is balanced, and bottle body expansion caused by gas accumulation is effectively prevented.

The invention belongs to the technical field of aero-engine exhaust systems, particularly relates to a plug nozzle air film cooling strengthening device based on a Coanda effect, and aims to solve the problem that a plug cone of a binary plug nozzle is positioned in a nozzle, so that the temperature of the plug cone is very high, and the plug cone must be cooled in order to protect the plug cone and improve the stealth capability. A traditional air film cooling structure cannot avoid separation of downstream cooling airflow of an air film groove from a wall face, and consequently air film cooling efficiency is low, according to the scheme, the air film cooling structure comprises a two-dimensional spray pipe, the front section of the two-dimensional spray pipe is a round-to-square section, the rear section of the two-dimensional spray pipe is a two-dimensional section, a plug cone is arranged in the two-dimensional section, and the upper side and the lower side of the plug cone are each provided with an air film groove and a boss. And the boss is positioned at the downstream of the outlet of the gas film groove. According to the plug nozzle air film cooling strengthening device based on the Coanda effect, separation of cooling airflow is restrained through the Coanda effect generated when the airflow flows through the boss, and the air film cooling efficiency can be improved under the same cooling airflow flow.

The invention belongs to the field of engine combustion chambers and combustion heater devices, and discloses a bubble and pintle coaxial injection design method and a nozzle. The bubble and pintle coaxial injection design method comprises the following steps: determining a technical scheme; determining the technical effect of each module; determining a flow requirement of each module; and determining the processing method of the bubble and pintle coaxial nozzle. The bubble and pintle coaxial nozzle comprises a bubble nozzle and a pintle nozzle which share the same central axis, the pintle nozzle is sleeved outside the bubble nozzle, and an outlet of the bubble nozzle is located in an inner cavity of the pintle nozzle. According to the bubble and pintle coaxial injection design method, compact layout partition type four-cavity design is adopted, and the obtained bubble and pintle coaxial nozzle is simple and reliable in structure and light in weight and has engineering practical value.

The patent is a kind of ring cluster plug engine layout scheme fusing multiple unit solid-liquid combustion chamber, which uses liquid propellant supply system to adjust the flow of multiple unit combustion chamber, has thrust regulation, thrust vector and multiple starting ability, and comprises liquid propellant, storage tank, storage tank valve, storage tank pipeline, electric pump, power supply and control module, plug cone, post-pump pipeline, flange, inner nozzle, combustion chamber, solid charge, injector, ignition device, combustion chamber pipeline, combustion chamber pipeline valve and liquid collecting ring. The electric pump, post-pump valve and combustion chamber pipeline valve work cooperatively to adjust the valve opening, change the liquid propellant flow into the combustion chamber, and realize the nozzle thrust regulation; the inner nozzles are uniformly arranged along the plug cone in a ring direction, each inner nozzle corresponds to a combustion chamber and a combustion chamber pipeline, the combustion chamber pipeline valve controls the opening, adjusts the combustion chamber pipeline valve to change the flow field of the plug nozzle engine, generates lateral force, and realizes the engine thrust vector; the liquid propellant is injected into the combustion chamber multiple times, the mixed solid-liquid propellant is ignited by the ignition device, and the nozzle realizes multiple start.

This invention relates to the field of petroleum development technology, and provides a downhole positive pressure self-retrieving hydraulic deblocking system comprising: a high-pressure pump; tubing connected to the high-pressure pump; a drill plug nozzle; and a self-retrieving sand string disposed between the tubing and the drill plug nozzle. The self-retrieving sand string comprises: a central tube, the inner wall of which defines a string cavity, the string cavity being in fluid communication with the tubing and the drill plug nozzle to form at least a portion of a high-pressure fluid flow channel; and an outer wall tube coaxial with and circumferentially surrounding the central tube. This deblocking system removes and cleans the wellbore inner wall using water jet technology, while simultaneously recovering and returning deblocking debris and sand particles through a self-retrieving sand device design, achieving integrated deblocking and sand retrieval operations in horizontal wells. This invention also provides a downhole positive pressure self-retrieving hydraulic deblocking method using this deblocking system.

The composite planetary reduction gearbox comprises an upper reduction gearbox body and an input shaft, the upper reduction gearbox body is movably connected with the input shaft in an inserted mode, the input shaft is sleeved with a bearing a, the input shaft is rotationally connected with a planet carrier bearing seat through the bearing a, and the upper portion of the surface of the input shaft is sleeved with an input end cover; a framework oil seal a is arranged on the input end cover, a fixed connecting seat is fixed on the outer side of the planet carrier bearing seat, a direct insertion nozzle is arranged on the fixed connecting seat, a fixed large gear is installed at the bottom end of the fixed connecting seat, and a slewing bearing is arranged at the bottom end of the fixed large gear; and a reduction gearbox lower shell is arranged outside the slewing bearing. According to the composite planetary reduction gearbox, the upper reduction gearbox is directly inserted into the input shaft, maintenance is convenient, cost input is reduced, the lower reduction gearbox is internally provided with a first-stage planet carrier for speed reduction, and the rotating speed is further stably reduced.

A propulsion unit includes a gas turbine engine and an exhaust nozzle coupled to an aft end of the gas turbine engine. The exhaust nozzle is configured to interact with exhaust gases exiting the gas turbine engine in an aft direction. The exhaust nozzle includes an outer nozzle case and an inner plug that cooperate to define an exhaust flow path therebetween. The exhaust nozzle is configured to manipulate the exhaust gases to provide different thrust capabilities for the gas turbine engine.

The utility model discloses a gear box screw plug surface cleaning assembly and a sand blasting machine, the gear box screw plug surface cleaning assembly comprises a bearing platform and a mounting support, a plurality of fixing columns are arranged around the surface of the bearing platform at equal intervals, screw plugs to be cleaned are inserted into the fixing columns through plug nozzles to complete fixation, and the mounting support is provided with an upper row of transverse rods and a lower row of transverse rods. A plurality of cleaning nozzles are sequentially arranged on the upper-row cross rod and the lower-row cross rod, the two rows of cleaning nozzles are sequentially arranged in a crossed mode, the cleaning directions of the two rows of cleaning nozzles are opposite, a crossed cleaning area is formed, and the bearing table is driven to rotate and the two rows of cleaning nozzles are driven to swing up and down through the rotary driving unit and the up-down driving unit respectively. And the surface of the screw plug is cleaned. The cleaning nozzles located on the upper transverse rod and the lower transverse rod deflect up and down to clean the plug screw located on the bearing table, oil stains and dust on the surface of the plug screw are rapidly removed, it is guaranteed that the later sand blasting process is conducted smoothly, and the sand blasting effect and the quality of the follow-up process are improved.

The invention belongs to the field of engine combustion chambers and combustion heater devices, and discloses a composite pintle nozzle and a wide-range efficient combustion method thereof. A double-layer circular tube structure with a closed bottom surface is arranged on the central axis of the combined pintle nozzle, a radial circular seam is arranged between an inner-layer circular tube and an outer-layer circular tube, a central straight hole is formed in the bottom surface of the inner-layer circular tube, and a radial hole is formed in the side wall, close to the bottom surface, of the outer-layer circular tube; a circular seam is further formed in the outer side of the outer-layer circular pipe; oxidizing agents are supplied to the circular seams. According to the wide-range efficient combustion method, the flow of fuel flowing through radial holes and a central straight hole is controlled by a cavitation pipe. According to the composite pintle nozzle and the wide-range efficient combustion method thereof, through an adjusting structure and a fuel supply scheme, the purposes that the flow changes in a larger range, the temperature distribution of a combustion outlet is more uniform, an oxidizing agent reacts more thoroughly, and the combustion efficiency is higher are achieved; the wide-range efficient combustion method is simple, reliable and high in distribution efficiency and has engineering practical value.

A propulsion unit includes a gas turbine engine and an exhaust nozzle coupled to an aft end of the gas turbine engine. The exhaust nozzle is configured to interact with exhaust gases exiting the gas turbine engine in an aft direction. The exhaust nozzle includes an outer nozzle case and an inner plug that cooperate to define an exhaust flow path therebetween. The exhaust nozzle is configured to manipulate the exhaust gases to provide different thrust capabilities for the gas turbine engine. The exhaust nozzle includes a thrust reverser configured to be retained by the inner plug.