33results about How to "Strong engineering realization" patented technology

The utility model relates to a double bypass ejector device for aero-engine, and the inner channel body is located in the ejector. The airflow inlet ends of each flow-stabilizing branch plate are respectively fixed on the inner surface of the shell of the middle section of the ejector, and communicate with the annular high-pressure gas source chamber on the middle section of the ejector; the closed end of each flow-stabilizing branch plate is located in the inner channel in vivo. The outer duct of the ejection device is formed between the inner surface of the ejector and the outer surface of the inner duct body, and the inner duct body of the ejection device is formed by the inner hole of the inner duct body. The invention changes the exhaust speed of the internal and external injection through the distributed variable Mach number nozzle, realizes the variable bypass ratio injection, and can carry out the power simulation of the turbofan engine, and the intake and exhaust positions of the internal channel of the ejector are located In the outer duct, the high-speed mixed ejection gas of the inner duct body can further eject the outer duct mixed gas at the outlet of the duct support plate, which realizes the secondary ejection of the duct, further improves the kinetic energy of the outer duct mixed ejection flow, and also improves the overall ejection efficiency.

A space multifunctional inflatable airtight cabin skin structure suitable for a manned environment, comprising: a wear-resistant layer, a radiation protection layer, an airtight layer, a pressure-bearing layer, a fragment protection layer, Heat insulation layer, anti-space environment layer and flame retardant layer. The present invention adopts a technical means composed of fully flexible materials for the structure of the airtight cabin, and through the optimized configuration and design of multi-layer materials with different functions, it plays the roles of airtightness, pressure bearing and protection for the cabin structure, and brings the airtight cabin Light weight, small folding volume and other effects can directly guide the design of the structure of the compressible and foldable inflatable expandable manned airtight cabin.

The invention relates to the field of aero-engine testing, in particular to a roller adapter that can be installed and locked vertically. The roller adapter includes: a slider seat, a front support roller, a rear support roller, and an adjustable holding part; The installation surface; the front support roller and the rear support roller are set on both sides of the holding part; among them, when the support part does not fully hold the beam, the roller adapter uses the part of the beam that can be held as a slide rail, using the front support roller and the rear support roller Roll on the slide rail to a suitable holding position to hold the beam.

The invention discloses a forced diversion control method which includes first conducting diversion nominal track design according to a designated diversion period, conducting subsection planning on a motor-driven path based on error boundary and adopting a single pulse control method based on C-W guidance rate in each section to achieve track tracking of the subsection planning route to form a single side limit cycle. The method completely utilizes diversion largest error boundary, plans movement track in an error boundary and controlled diversion track moving tread, achieves quick diversion, saves fuel consumption and has strong engineering practicalness.

The invention discloses a control method for the orbit and the attitude of a satellite, which is characterized by comprising the following steps of: determining disturbance moment for the control of the orbit; determining a control strategy for the attitude according to the disturbance moment, wherein the control strategy for the attitude comprises a control mode of air jet or a control mode of angular momentum exchange; determining an air jet strategy for the control of the orbit according to the control strategy for the attitude; and carrying out the control of the orbit and the attitude according to the air jet strategy. The method can be suitable for a satellite with large disturbance moment in the orbit-controlled air jet process.

The invention discloses a system for preparing a hydrogen-rich synthesis gas by employing iron ore catalytic reforming of bio-oil, belongs to a system for preparing a hydrogen-rich synthesis gas through catalytic reforming of the bio-oil, and aims at solving the problems of inactivation of a catalyst caused by an existing process for preparing the hydrogen-rich synthesis gas by employing iron-based catalyst reforming of the bio-oil and a low iron ore grade in China at present to achieve high values of the bio-oil and the iron ore. The system comprises a preheating device, a steam generator, a reforming reactor, a heating furnace, a purifying column and an air cooling chamber. The system is simple in formation, efficient, energy-saving, economic, and high in engineering realizability and wide in application range of raw materials; the added value of a product of a technology for iron ore catalytic reforming of the bio-oil is increased; and the method is suitable for high-value utilization of various biomass-based bio-oil products and grade improvement technologies of various low-grade iron ores.

The present application discloses a method and a converter for suppressing subsynchronous resonance of a doubly-fed wind turbine. The method includes: acquiring a stator current i of a doubly-fed wind turbine s_meas and rotor current i′ r_meas , calculate the subsynchronous current component i in the excitation current of the DFIG m_ss , and then through the amplitude and phase transformation to form the subsynchronous damping action u c_ss , to form the final action amount superimposed on the basic action amount of the doubly-fed wind turbine. The present application calculates the subsynchronous current component in real time based on the stator current and rotor current of the doubly-fed wind turbine. Compared with the detection of the subsynchronous component in the grid voltage, the engineering is simpler and more reliable, and there is no need to accurately identify the frequency point of the subsynchronous resonance. The damping control of subsynchronous resonance can be realized in a wide frequency band, thereby eliminating the risk of subsynchronous resonance when the doubly-fed wind turbine is connected to a specific power grid, and ensuring the safe and stable operation of the system after connecting to the power grid.