12 results about "Jet injection" patented technology

The invention relates to the technical field of automatic control, and discloses a pressure closed-loop self-calibration method for an ultrahigh-speed jet injection process, and the method comprises the steps: initializing a system, and building a pressure and temperature combined compensation model; a high-precision sensor is used for collecting real-time pressure and temperature data; by calculating a pressure deviation intelligent switching control strategy, PID is combined with feed-forward compensation in a steady state, and a deep reinforcement learning algorithm is switched to realize quick response in a transient state; automatically triggering closed-loop self-calibration according to operation time or a deviation threshold value, executing zero point and full scale calibration and updating compensation parameters; and carrying out residual analysis by using a digital twinborn model to realize fault diagnosis and early warning. According to the invention, the problems of low control precision and poor long-term stability of an ultra-high-speed jet flow process under nonlinear and large-lag working conditions are solved, and high-precision stable control and system self-adaptive calibration under a wide speed range are realized.

This invention provides a high-pressure jet injection lawn loosening machine, including a frame, wheel assembly, working unit, and control unit. The working unit includes an injection assembly, a water circuit assembly, and an air circuit drive assembly. The injection assembly includes an injection cylinder, a movable circular pressure plate sleeved on the lower end of the injection cylinder, and an injection tube fixed to the lower end of the injection cylinder and passing through the movable circular pressure plate. An elastic element is provided between the movable circular pressure plate and the cylinder seat of the injection cylinder. The water circuit assembly includes a water tank, a high-pressure pump, a high-pressure storage tank, and a switch valve. The outlet of the water tank is connected to the inlet of the high-pressure pump, and the outlet of the high-pressure pump is connected to the inlet of the high-pressure storage tank. The outlet of the high-pressure storage tank is connected to the injection tube via the switch valve. The air circuit drive assembly includes an air compressor, which is connected to the injection cylinder and used to drive the injection cylinder to move the injection tube in a reciprocating injection motion. This invention allows the site to be used immediately after operation without a recovery period and can be operated by a single person.

The utility model relates to the technical field of denitration equipment, and discloses a spray head for a flue gas SNCR denitration jet spray gun, which comprises a contraction section, a throat part, an expansion section and a spray plate which are communicated in sequence, a nozzle is arranged on the spray plate, the spray plate is fixedly connected with the expansion section, the diameter of the contraction section and the diameter of the expansion section are both larger than the diameter of the throat part, and the expansion section is fixedly connected with the expansion section. The connecting positions of the contraction section, the throat portion and the expansion section are in arc transition connection, a plurality of nozzles are formed in the spraying plate and evenly distributed on the spraying plate, the spraying plate is located on the inner side of the expansion section, and the diameter of the spraying plate is matched with the diameter of the expansion section. According to the scheme, atomized liquid drops are refined, dispersed and atomized through the nozzles, and the contact effect of a denitration agent and flue gas is improved; the particle size of fog drops is reduced while the flow rate of the denitration agent is guaranteed, the particle size distribution of the fog drops is uniform, and the flue gas denitration effect is better controlled; multi-angle spraying can be formed through the spraying plate and the spraying head, and the requirement for uniform dripping and spraying of a complex hearth structure is met.

The utility model belongs to the technical field of cleaning equipment, and particularly relates to a handheld cleaning device which comprises a cleaning disc assembly and a handheld frame fixedly connected with the cleaning disc assembly, a rotating joint is fixedly arranged in the middle of the cleaning disc assembly in a penetrating mode, and one end of the rotating joint is connected with a high-pressure hose in a penetrating mode. One end of the cleaning disc assembly is connected with a high-pressure hose, the other end of the cleaning disc assembly is connected with a cavitation jet injection pipe in a rotating mode, the cavitation jet injection pipe is communicated with the high-pressure hose through a rotating connector, the cavitation jet injection pipe is transversely distributed in the cleaning disc assembly, and cavitation jet cleaning nozzles are obliquely installed at the two ends of the cavitation jet injection pipe.

The present application relates to a kind of large-scale ramjet fuel injection design method based on boundary layer similarity, comprising: the basic configuration of ramjet is constructed, and by the scale variation of ramjet and the actual working condition and flow variation faced, the variation of boundary layer relative thickness in ramjet is qualitatively analyzed, and qualitative analysis result is obtained;Obtain flow field related information, capture characteristic quantity, and obtain characteristic scale information according to the basic configuration of ramjet;Boundary layer displacement thickness is calculated and corrected using scale effect phenomenon;According to general jet penetration depth formula, the corrected boundary layer displacement thickness and the jet penetration depth required for design are brought in, and fuel jet dynamic pressure ratio and jet orifice size are solved;The fuel jet dynamic pressure ratio and jet orifice size obtained are applied to the fuel injection design of ramjet, and the transverse jet injection correction scheme for the variation of boundary layer relative thickness is formed.

The application provides a jet ignition combustion chamber control method and device, a jet ignition combustion chamber, an electronic device and a storage medium. The combustion chamber comprises a pre-chamber and a main combustion chamber. A spark plug is arranged in the pre-chamber. A jet injection hole is arranged at the bottom of the pre-chamber. The pre-chamber and the main combustion chamber are communicated through the jet injection hole. The method comprises the following steps: obtaining the excess air coefficient of the pre-chamber; if the excess air coefficient reaches a preset threshold value, controlling the spark plug to ignite, so that the high-temperature jet generated by the pre-chamber enters the main combustion chamber through the jet injection hole, and the main combustion chamber is caused to occur multi-point spontaneous combustion. The technical scheme of the embodiment of the application can improve the thermal efficiency of the engine and reduce harmful gas emission.

The present application relates to a kind of oxygen-removing device low-temperature reheat steam source pressure regulating system, including entity equipment and control hub in the technical field of thermal power plant cogeneration and boiler bypass heat supply stable pressure regulation and control, entity equipment includes feedforward perception matrix, acoustic muffling flash device, residual waveform sensing node, pneumatic damping valve array and porous jet pipe network.System acquires parameters through feedforward perception matrix, utilizes evolution prediction module to output the space coordinates and pressure wave frequency band of unvaporized water droplet induced flash expansion.Stable pressure intervention module adjusts the physical volume of acoustic muffling flash device according to prediction result and activates microwave phase change excitation field, eliminates pressure pulsation and promotes water droplet instantaneous phase change.At the same time, calculate the antiphase compensation waveform to drive pneumatic damping valve array to implement fluid interference cancellation, smooth steam passes through porous jet pipe network self-excitation oscillation jet injection, eliminate vacuum negative pressure area, prevent oxygen-removing device internal transient water hammer.

The invention provides a multi-stage cavitation jet jetting device. The multi-stage cavitation jet jetting device comprises an inlet pipe, a first connecting pipe, an upstream nozzle, a second connecting pipe and a downstream nozzle. The inlet pipe is connected with the first connecting pipe, and the upstream nozzle is arranged at the joint of the inlet pipe and the first connecting pipe; the first connecting pipe is connected with the second connecting pipe, an inner cavity of the first connecting pipe is communicated with an inner cavity of the second connecting pipe, and a Helmholtz resonant cavity is formed by the first connecting pipe and the second connecting pipe; the downstream nozzle is arranged at the downstream end of the second connecting pipe; fluid sequentially flows through the inlet pipe, the upstream nozzle, the Helmholtz resonant cavity and the downstream nozzle and then is sprayed out; an organ pipe cavity structure used for inducing self-oscillation of fluid is arranged in the downstream nozzle. The problems that an existing cavitation nozzle is complex in internal structure, large in machining difficulty and high in manufacturing cost are solved, and the problems that a single cavitation mechanism adopted in the prior art is insufficient in cavitation strength and efficiency are solved.

This invention discloses a two-stage alternative fuel pre-combustion furnace system, relating to the field of pre-combustion furnace technology. It includes a first pre-combustion furnace body and a second pre-combustion furnace body stacked vertically, a connecting device, and a jet injection system. The top of the first pre-combustion furnace body has a first top cavity, which has a first alternative fuel inlet and a first conventional fuel inlet. The top of the second pre-combustion furnace body has a second top cavity, which has a second alternative fuel inlet and a second conventional fuel inlet. The bottom of the first pre-combustion furnace body is connected to the inlet of a decomposition furnace. The connecting device connects the first and second pre-combustion furnace bodies. The inner walls of the first, second, and connecting devices are all provided with stepped hearths. The jet injection system is located below the stepped hearths.

The invention relates to the technical field of medical apparatus and instruments, in particular to an inner cylinder type airflow rotating jet dosing device which comprises a medicine storage cavity used for storing medicine, and the medicine is a powdery substance or a liquid substance; the medicine storage cavity is provided with a medicine outlet; the rotational flow generating structure is communicated with the medicine storage cavity and is used for guiding air flow into the medicine storage cavity to form rotational air flow so as to drive the medicine to rotate; and the first gas conveying pipe is communicated with the rotational flow generating structure. The rotational flow generating structure is arranged in the medicine storage cavity, air flow is guided into the medicine storage cavity to form rotational air flow, then medicine is driven to rotate, and the medicine has sufficient angular momentum. The medicine with the angular momentum has the normal momentum and also has the angular momentum, and when the medicine is in contact with a wound surface, tangential friction force can generate a drilling effect, so that the medicine can be embedded into tissue gaps more easily, rebound is reduced, anchoring stability is improved, water absorption is faster, a better blood coagulation activation effect is achieved, a firmer physical barrier is achieved, and the optimal curative effect is achieved.

This invention provides a method for adjusting turbine flow capacity based on casing jet injection, belonging to the field of turbine technology. A jet injection channel is provided in the casing, located near the throat. Airflow from the high-pressure compressor passes through the jet injection channel and enters the guide vane passage. When no jet injection is applied, the fluid near the endwall migrates towards the suction side due to the lateral pressure gradient, forming a channel vortex. By injecting jet injection into the casing, a flow separation zone is generated on the inner surface of the casing. Simultaneously, the aforementioned migrating flow is enhanced, and a portion of the mainstream flow downstream of the jet injection point is entrained by the high-momentum jet flow. The two flows mix, causing premature and extensive separation in the guide vane corner region. The low-energy fluid regions generated by these two separations affect the effective flow area of ​​the mainstream flow, altering the guide vane's flow capacity. This invention avoids the difficulties of applying existing geometric adjustments to high-pressure turbines and the increased complexity of the internal cooling structure of the blades caused by aerodynamic adjustments.