235 results about "Gas dynamics" patented technology

A new method for repairing turbine engine components is provided. The method utilizes a cold gas-dynamic spray technique to repair degradation on turbine blades, vanes and other components. In the cold gas-dynamic spray process particles at a temperature below their fusing temperature are accelerated and directed to a target surface on the turbine blade. When the particles strike the target surface, the kinetic energy of the particles is converted into plastic deformation of the particle, causing the particle to form a strong bond with the target surface. Post-spray processing is then performed to consolidate and homogenize the applied materials and restore integrity to the material properties in the repaired turbine component. Thus, the cold gas-dynamic spray process and post-spray processing can be employed to effectively repair degraded areas on gas turbine components.

A method for repairing a titanium alloy surface of a turbine component includes the step of cold gas-dynamic spraying a powder material comprising at least one titanium alloy directly on the titanium alloy surface. The method may further include the steps of hot isostatic pressing the cold gas-dynamic sprayed turbine component, and performing a separate heat treating step after the hot isostatic pressing. Thus, the cold gas-dynamic spray process and post-spray processing can be employed to effectively repair degraded areas on compressor turbine components.

The pulmonary oxygen flow control system delivers oxygen from a source of pressure to a nasal cannula worn by the patient. Between the source and the nasal cannula is a pendant flow structure which includes an orifice followed by a gas dynamic valve. When the downstream pressure in the cannula is high, the gas dynamic valve diverts the oxygen flow through the orifice to a flexible reservoir. Upon inhalation, the pressure at the cannula falls so that the gas dynamic valve delivers the orifice flow to the cannula and also utilizes a Venturi effect to withdraw oxygen from the reservoir and deliver it to the cannula. The cannula has nasal tubes which have angular faces and which are positioned farther into the nares to deliver the oxygen more efficiently.

A fire-extinguishing device includes a vessel containing a fire-extinguishing substance, a tank of pressurized gas, flexible pipe for connecting the vessel and the tank to each other as well as to a device that generates a directed flow of the fire-extinguishing substance mixed with the working gas, and a pressure regulator for the working gas. The device has a mixing chamber for the fire-extinguishing substance and the gas, with the chamber having a gas-dynamic nozzle mounted at its outlet. A profiled channel in the nozzle has a length equal to at least twice the diameter of the nozzle channel at its smallest section. The vessel and the tank may be fitted in a backpack. The nozzle may be made in the shape of ring and fitted with an annular channel for feeding additional working gas before a minimal section of its own channel. The central body of the annular nozzle may be made in the shape of a cone with its tip directed toward the nozzle inlet.

The invention relates to an establishment method for hydrocarbon source rock hydrocarbon production rate charts in petroleum resource assessment. The establishment method includes the steps of 1), collecting experimental samples and determining thermal simulation experiment data through experiments; 2), collecting materials; 3), calibrating kerogen generated oil, generated gas and oil-cracking gas kinetic parameters; 4), establishing sedimentary burial history and thermal-history models of hydrocarbon source rocks on a target stratum of a research area; 5), establishing constraint condition of hydrocarbon source rock hydrocarbon production rate; 6), establishing kerogen generated oil, kerogen generated gas, oil generated gas, clean and total gas conversion profile charts on the target stratum of the research area; 7), checking whether dynamics geological extrapolation results meet requirements or not; 8), putting forwards part of hydrocarbon expulsion mode adjustment coefficients, evaluating hydrocarbon production rate curves of the partial hydrocarbon expulsion model, and establishing the hydrocarbon source rock hydrocarbon production rate charts including three modes, namely the mode of complete hydrocarbon expulsion, the mode of partial hydrocarbon expulsion and the mode of no hydrocarbon expulsion. The shortcoming in an original calculating method and experiment simulated data of the hydrocarbon source rock hydrocarbon production rate is overcome, and the hydrocarbon source rock hydrocarbon production rate at the target stratum can be accurately and reasonably determined according to oil field exploration practice by oil field workers.

The invention discloses a coal and rock dynamic disaster multi-parameter wireless monitoring comprehensive early-warning technology and method. The technology and method involve a data acquisition unit, a data storage and processing unit and a comprehensive early-warning unit. According to the technology, on the basis of the advantage that an intelligent line supports a brand new wireless digital communication system with the high-precision positioning and wireless access capacity in a closed special environment by means of the internet of things and a communication technology, with a working face coal body physical signal as a basis, an underground coal mine gas concentration sensor, a coal body stress gauge, a top plate pressure monitoring system, a sound emitting and monitoring system, an electromagnetic radiation monitoring system, a microearthquake system and a sensor of the microearthquake system are in wireless docking with the intelligent line, an underground wireless monitoring early-warning associated equipment is researched, a coal and rock gas dynamic disaster wireless multi-parameter judgment method and coal and rock gas dynamic disaster wireless multi-parameter judgment indexes are established, a coal mine coal and rock gas dynamic disaster wireless multi-parameter remote monitoring and early-warning system is formed, and a coal mine coal and rock gas dynamic disaster wireless multi-parameter remote monitoring comprehensive early-warning platform is developed.

The present invention relates to a device for generating a gas-droplet stream, wherein the said device includes a gas-dynamic nozzle (1), which is connected to a chamber (2) for mixing gas and liquid and containing a liquid flow dispersion system (3). The chamber (2) is connected to a liquid and gas supply system through a controlled valve, wherein the said valve ensures an early inlet of a gas flow prior to that of the liquid when the device is turned on, and cuts off the liquid supply when the said device is turned off. The valve comprises two closure members (5,6) which interact with the seats provided on the walls of sealed chambers (8,9) and which communicate respectively with liquid and gas supply ducts (10,11). The member (5) is rigidly connected to a rod (7) so as to be brought in contact with the seat in the gas supply chamber (8), while the member (6) is coaxially mounted on the said rod (7) so as to be capable of displacement along the same upon interaction with a stop.

A portable gas dynamic cold spray gun eliminates many of the inherent limitations of the prior art by minimizing a scatter of operating parameters and improving its efficiency. According to one feature of the present invention, the powder flow rate is continuously measured so that the powder flow rate and/or the flow rate of the pressurized gas can be adjusted accordingly in order to control the deposition efficiency of the spray gun.

The invention relates to the cold gas dynamic spray technology and the laser technology, in particular to a cold gas dynamic spray method comprising laser irradiation, wherein, compressed gas which carries with metallic powder impacts against the surface of a plaque at supersonic speed to form a circular spray spot on the surface of the plaque; meanwhile, an elliptic irradiation laser speckle is formed directly ahead of the circular spray spot through laser beam irradiation; moreover, the elliptic irradiation laser speckle and the circular spray spot are partly overlapped. The invention can substantially reduce the particle critical speed during cold gas dynamic spray and increases splicing efficiency and strength to ensure structural stability of spray particles, thereby improving coating performance.

The invention relates to a coalbed gas dynamic effect simulation system. The system comprises a gas injection system, a sample loading system, a compaction system and an information acquisition system; the sample loading system comprises a high pressure cylinder body which is provided with a plurality of information sensors, one end of the high pressure cylinder body is provided with an exhaust valve and the other end is a sealed pressure plunger; a hydraulic oil chamber is arranged in the hydraulic plunger, a gas inlet tube penetrating the plunger is arranged at the middle part of the hydraulic plunger, and the gas inlet tube penetrates the other end cover; the gas injection system consists of a high pressure bottle, a relief valve, a tube valve fitting and the like, ,and supplies gas to the gas inlet tube; the compaction system comprises a hydraulic pumping station which injects oil to the hydraulic oil chamber arranged in the hydraulic plunger and provides oil pressure; and the data acquisition of the sample loading, compaction and gas injection processes is controlled by an information acquisition control system. The simulation system can reproduce migration and outburst processes of the coalbed gas, reproduce stress concentration and stress relief processes of coal rock, and can be applied to other related physical effect experimental studies.

The invention relates to methods and devices for the transport of ions generated in gases near atmospheric pressure into the vacuum system of a mass spectrometer. Instead of the single capillary customary in commercial instruments, the invention uses a multichannel plate with hundreds of thousands of very short and narrow capillaries, whose total gas throughput is no higher than that of a normal single capillary. The large-area take-up of ions in the gas flow greatly increases the transfer yield. If the channels are conductive, this prevents the inside surfaces becoming charged. An ion funnel can separate the ions from the gas flow in the vacuum and focus them. Gas-dynamic focusing in an electric decelerating field reduces ion losses caused by wall collisions and prevents very light ions (protons, water clusters) from entering the vacuum. Staged multichannel plates reduce pumping requirements.

The invention relates to the technical field of mixed gas separation, in particular to a method and a device for separating combined oxygen and nitrogen absorbed together by temperature change. The device comprises at least two absorption towers filled with absorbent, a heating and heat exchange device which heats and cools the absorbent in the absorption towers, pipelines supplying raw material gas to each absorption tower, a pipeline taking out the product gas from each absorption tower, a pipeline for recycling and exchange of gas components and energy between the absorption towers so as to transfer the gas kinetic energy and heat of the absorption tower which absorbs saturatedly to the other absorption tower, an oxygen and nitrogen product gas cushion tank, washing pipelines introducing the oxygen product gas to the feeding end of each absorption tower, and washing pipelines for introducing the nitrogen gas product to the discharging end of each absorption tower. The separating method provided by the invention can obtain two kinds of high-purity products, namely oxygen and nitrogen, at the same time by adopting a single absorption and separating process, and therefore meets the requirement of astronauts on the aerospace oxygen. The device system can be integrated highly, and the size and weight of the device system meet the requirements of the future aerospace craft on oxygen and nitrogen extraction development and the requirements of the onboard equipment.

The invention relates to a burner of cooking utensils and a preparation technology of a tray for combustion in the burner. The burner comprises a distributor, a tray for combustion, a base seat and an ignition device, wherein, the distributor consists of an external distributor and an internal distributor; the tray for combustion is provided with three rings of fire, three grooves for flame stabilization and four overall channels, has a maximum sectional drift diameter necessary for gas to enter into the tray for combustion and leaves four fan-shaped secondary air inlets at the bottom of the tray so as to ensure the secondary air supply to inner ring fire and central fire. Induction tunnels communicated with a gas pipe for main fire and a gas pipe for central fire are arranged on two staggered horizontal planes with independent gas intake, which greatly saves gas kinetic energy and reduces resistance in air intake by the induction tunnels. The burner can ensure enough primary air intake without yellow flame, flashback and blow-off for more full burning. The preparation technology provided by the invention can ensure high surface smoothness of the tray for combustion and high precision in dimension of an inner cavity, smooth flow of gas and reduction in loss of gas kinetic energy so as to improve the efficiency of gas combustion.

A method is provided for forming a graded coating on a surface of a substrate. The method comprises the step of cold gas-dynamic spraying powder mixtures on the substrate surface to form the graded coating thereon. The method does not distort the substrate and does not require the use of an apparatus that needs to be stopped and re-started each time the composition of the graded coating changes. Moreover, the method is generally inexpensive, efficient, and yields high quality graded coatings.

The invention discloses a coal rock gas dynamic disaster simulation device, which comprises a cylinder body assembly, a pressure relief device and a data monitoring system, wherein the cylinder body assembly comprises a piston rod, an upper cover, a piston, a rubber O-shaped ring for the piston, a cylinder body, a lower cover and the rubber O-shaped ring for the lower cover, wherein a square pressure relief opening is formed in the cylinder body; and the pressure relief device comprises an air compressor, a dynamic pneumatic cylinder, a supporting beam, a bracket, a pressure relief plate, a pressure relief opening sealing plate and a square rubber pad. The coal rock gas dynamic disaster simulation device can simulate dynamic disasters under the conditions of high stress, high gas and different surrounding rocks and is more practical in field engineering.

An apparatus and method for performing mass spectroscopy uses an ion interface to provide the function of removing undesirable particulates from an ion stream from an atmospheric pressure ion source, such as an electrospray source or a MALDI source, before the ion stream enters a vacuum chamber containing the mass spectrometer. The ion interface includes an entrance cell with a bore that may be heated for desolvating charged droplets when the ion source is an electrospray source, and a particle discrimination cell with a bore disposed downstream of the bore of the entrance cell and before an aperture leading to the vacuum chamber. The particle discrimination cell creates gas dynamic and electric field conditions that enables separation of undesirable charged particulates from the ion stream.

A coal gas dynamics simulation system for a steel enterprise belongs to the simulation technology field of metallurgical energy. The system consists of coal gas production and consumption process simulating computers, a coal gas scheduling emulator, a gaspipe network emulator and a monitoring and displaying device connected in an Ethernet local network. The coal gas production and consumption process simulating computers include four types referring to a coal gas production simulating computer, a coal gas consumption simulating computer for the main production process, a coal gas consumption simulating computer for the auxiliary processes and a coal gas regulation user simulating computer; the coal gas scheduling emulator (14) simulates the roles of production plans of the steel enterprise and coal gas balancing and scheduling; the gaspipe network emulator (15) realizes the dynamic simulation of coal gas in the internal pipe network of the steel enterprise; the monitoring and displaying device (16) conducts demonstration of the coal system dynamics of the steel enterprise in the form of figures. The invention has the advantage that simulation of related processes is based on production stages with the time granularity as fine as minute, thereby reflecting the dynamic property of the coal gas system and testifying the validity and the rationality of the scheduling algorithm.

The disclosed device comprises: a gas dynamic system, a water-filling exhausting system to fill the pressure media into the high-pressure device rapidly and exhaust gas, a pressure up-down system for compression, holding and release; a detection control system to monitor and control whole process and output data, and a security protection system to protect when over pressure. This invention fit to different test and analysis with stable pressure and well reliability.

A method of forming a coating deposits a material onto a substrate with high velocity thermal spray apparatus. The method comprises the steps of mixing of an oxidizer gas and a gaseous fuel in the mixing unit, igniting and combusting the oxidizer and gaseous fuel mixture in the combustion chamber, feeding products of combustion to the accelerating nozzle, introducing selected spraying material into accelerating nozzle to form a supersonic stream of hot combustion product gases with entrained particles of spray material, and spraying at high velocity onto a surface positioned in the path of the stream at the discharge end of the nozzle; and forming a non-clogging convergent-divergent gas dynamic virtual nozzle (GDVN) in the accelerating nozzle by annularly introducing a coaxial gas flow, through a narrow continuous slot of circumferential ring geometry in the vicinity of the entrance to the diverging outlet bore of the accelerating nozzle.

Ion transfer assemblies and methods for directing ions from an ionization source to a mass analyzer. A first partition element separates a viscous flow region from a transition flow region. A second partition element separates the transition flow region into a first transition flow chamber and a second transition flow chamber. A focusing element defines a cavity shaped to direct a portion of a gas flow including ions entrained in a background gas from a first aperture in the first partition element towards a second aperture in the second partition element based on gas dynamics. The cavity is shaped to direct the gas flow without requiring the application of external electrostatic fields. Vents or slits can be provided in or between the first partition element and the focusing element to provide for expansion of the gas flow in the transition flow region.

The invention discloses a self-sealing dynamic pressure gas radial ceramic bearing, which comprises a ceramic bearing outer sleeve, a ceramic bearing inner sleeve, a large sealing stop ring and a small sealing stop ring. Grooves and evenly distributed concave holes, the outer circle and both ends of the ceramic bearing inner sleeve have regular-shaped groove patterns, and the inner circle has evenly distributed grooves, and the ceramic bearing inner sleeve is located in the ceramic bearing outer sleeve , the large sealing stop ring is arranged at both ends of the ceramic bearing outer sleeve, and the small sealing stop ring is arranged at both ends of the ceramic bearing inner sleeve. The dynamic pressure gas radial ceramic bearing of the present invention is equipped with large sealing stop rings at both ends of the ceramic bearing outer sleeve, small sealing stop rings at both ends of the ceramic bearing inner sleeve, and processed at both ends of the ceramic bearing inner sleeve. With regular-shaped groove patterns, driven by the high-speed rotary shaft, the continuously generated dynamic pressure gas can be better kept in the matching gap between the two ends of the inner sleeve of the ceramic bearing and the large sealing stop ring and the small sealing stop ring. The air film required for the sealing function is formed to play a self-sealing role, thereby ensuring that the bearing has good stability and load capacity.

The invention relates to the technical field of electromagnetic bearings and particularly discloses a gas dynamic and static pressure mixed thrust protection bearing for electromagnetic bearing system. The protection bearing includes a gas static pressure thrust bearing, a gas dynamic pressure thrust bearing and a gas supply system. The gas static pressure thrust bearing and the gas dynamic pressure thrust bearing both generate axial forces, the direction of the resultant force of the axial forces is opposite to the direction of the force to be born, and the gas supply system provides high pressure gas to the gas static pressure thrust bearing. The inventive gas dynamic and static pressure mixed thrust protection bearing is simple in structure and easy to process and operate, can provide sufficient rigidity to support the rotor during idle rotation after the rotor drops, reduces contact and wear of the main shaft thrust disc and the protection bearing, reduces the negative influences of vibration and impact accompanied by rotor drop, prolongs the service life of the protection bearing, and improves reliability of the electromagnetic bearing system.