33 results about "Aviation medicine" patented technology

The invention discloses a method for detecting the diameter of an outer wall of a tapered case of an aviation engine on line. According to the method, a five-coordinate numerical control milling center with a Renishaw MP10 trigger-type measuring head is equipped, tapered case parts and a mounting seat on the surface of a tapered case are equipped; a fine adjustment ring gauge of the used measuring head is measured on line; a point contact-type measurement mode is adopted; a machine tool siemens control system Sinumeric 840 D on-line measurement technology is adopted; and an on-line measurement quick tool path amendment and error compensation generation technology is adopted. The method has a broad application prospect; and by the on-line measurement technology, a numerically-controlled machine tool is impelled to form a machining and detecting integrated numerical control machining unit. By the method, the traditional manufacturing mode that a design characteristic is equipped with a set of measurement tool in the current industry is changed, the manufacturing cost of the tool is saved, repair labor-hour is saved, and first-pass yield of product processing is improved, so that the development period and the production cost of new products are reduced.

The invention discloses a method for manufacturing a damping structural piece of an aviation engine supporting system; a shape memorizing alloy wire is manufactured into metal rubber through the combined processes of manufacturing an elastic wire at low temperature, heat setting, winding and full-constraint heat setting; and the damping structural piece which is manufactured through the method has a shape memorizing effect and a variable rigidity characteristic. According to the method for manufacturing the damping structural piece of the aviation engine supporting system, a damping material in the metal rubber structure is integrated with a shape memorizing alloy, and a novel metal structural functional material with the advantages of the metal rubber and the shape memorizing alloy is developed. The material has good damping performance, high deformation capability and high bearing capability, and has the advantages of active and controllable elastic modulus, strong environment adaptability and stable and reliable structure. Because the advantages of the metal rubber and the shape memorizing alloy are integrated, the method can be applied in aviation engine rotor supporting and a non-peak rotor can be realized.

The invention provides a detection device and a detection method for wide-range vibration amplitude of a blade of an aviation engine. The detection device comprises a power supply, a fixture, bridge circuit boxes, millivoltmeters, a reading microscope, a spiral lifting support and current probes, wherein two transverse fixing supports for fixing the current probes are arranged on the spiral lifting support. An output end of a first current probe is connected with an input end of a first bridge circuit box. An output end of the first bridge circuit box is connected with an input end of a first millivoltmeter. An output end of a second current probe is connected with an input end of a second bridge circuit box. An output end of the second circuit box is connected with an input end of a second millivoltmeter. The power supply is connected with a detected blade which is fixed on the fixture. The detection device and the detection method solve the problem of difficult monitoring of the wide-range vibration amplitude in a blade fatigue test, provide a completely novel test method for monitoring technology of blade and blade tip vibration amplitude in the vibration fatigue test, and expand test technology of vibration stress in the blade fatigue test.

This invention relates to aviation scout plane stable control method based on vestibular oculomotor reflex, which adopts human eye control system mathematical module and comprises the following steps: sensor measuring rotation parameters of aviation direction, forward and turning through A/D conversion, digital filter, standard conversion and control desk by control signal to drive scout platform motor rotation. The single machine can receive sensor data for simple computation to control scout plate at certain speed and angle to compensate aviation pose change and to keep the platform in fix direction.

The invention relates to a method for obtaining control value of temperature behind a turbine of an aviation engine at high altitude and high speed. The method comprises the following steps of (1) screening several parameters which are mostly related with the engine efficiency from an engine logbook; (2) on the basis of using the known control values of the temperature behind the turbines of morethan hundreds of engines at high altitude and high speed as a training set, establishing a nervous network, using the selected parameters as input nodes, and using the control value of the temperaturebehind the turbine as the target value to train; after training, obtaining a nervous network model for calculating the control value of the temperature behind the turbine of the aviation engine at high altitude and high speed.

The invention relates to a water flow rate testing device of a turbine blade of an aviation engine. The water flow rate testing device comprises a water tank, a coarse filter, a water pump, a pressure gauge, a fine filter, a main path voltage regulation valve, a blade clamp, a worktable, a bypass flow passage, at least two parallel measuring branch lines, a temperature sensor and a pressure sensor, wherein the bypass flow passage is provided with a bypass adjusting valve; a cutoff valve and a flowmeter are arranged on each measuring branch line from the water inlet end to the water outlet end; the flowmeters on the measuring branch lines have different ranges. The water flow rate testing device of the turbine blade of the aviation engine has the advantages that the water flow rates of flow passages and air film holes of different turbine blades can be measured by one testing device, and the measuring accuracy is improved.

A disclosed spiral tube heat exchanger suitable for an aviation engine comprises a mixing chamber and a stainless steel tube bundle; the mixing chamber comprises a first-order mixing chamber and a second-order mixing chamber; the first-order mixing chamber comprises two '-' type circular pipes and two Z-shaped bend pipes; the second-order mixing chamber comprises N circular pipes; two ends of each of a part of circular pipes are respectively communicated with the two '-' type circular pipes, and the other end of each of the two '-' type circular pipes is enclosed; and two ends of each of the other part of circular pipes are respectively communicated with the upper ends of the two Z-shaped bend pipes, and the other end of each of the two Z-shaped bend pipes is enclosed; the stainless steel pipe bundle comprises multiple stainless steel pipes which are spiral pipes, and the stainless steel pipes are arranged in a circular radial manner for forming the stainless steel pipe bundle; and the two parts of the circular pipes are vertically corresponding and are in communication via stainless steel pipes. The spiral tube heat exchanger has the heat exchange efficiency substantially improved compared with the heat exchange efficiency of a common civil tube-bundle heat exchanger. The spiral pipe is capable of avoiding damage to heat exchanger structure and welding spots by absorbing engine self shock and forced shock during practical running of the aviation engine.

The invention provides a rapid formation method of an X-ray detecting device for a blade of an aviation engine. The rapid formation method comprises the following steps: I, establishing a three-dimensional entity model of the X-ray detecting device according to the blade structure; II, slicing the model of the detecting device, and planning the laser scanning path of each layer; III, inputting the model on selective laser sintering equipment, setting the technological parameters of selective laser sintering, and adopting laser beams to scan powder material on each layer according to the planned scan path; IV, performing finishing treatment on the surface of a part after machining; V, enhancing the strength of a formed part; VI, after curing the part, removing the redundancy on the surface to obtain the X-ray detecting device. According to the rapid formation method, the technology is simple and easy to control, the operation is reliable, the production period is short, and the repeatability is high; the X-ray detecting device manufactured by adopting the rapid formation method is reliable in mechanical property, meets the operating requirements, and can realize rapid response manufacture according to different blade structures.

The invention relates to the technical field of laser application, and further relates to a preparation technology of a thermal barrier coating of a blade of an aviation engine. Picosecond laser is utilized for carrying out etching process treatment during a preparation process of a bonding layer-bonding layer interface of the thermal barrier coating, and an interface tenon-shaped staggering structure is obtained, so that the bonding strength between a plasma spraying ceramic layer and a bonding layer is improved. During a high-temperature cyclic oxidation process, a thermal stress distribution state of the coating interface is effectively adjusted, a concentrated stress mode of the coating is changed, a growth model of constant-speed and plane propulsion of thermally grown oxide (TGO) isbroken, and the damage of a thermal stress and the growth way of the TGO on a binding force of the bonding layer and the ceramic layer is reduced. Through a thermal shock property experiment, the service life of the thermal barrier coating impacted by the bonding layer is greatly prolonged. A thermal barrier coating interface structure adjusting method provided by the invention is simple in process, easy to operate and convenient to implement.

The invention belongs to the technical field of aviation medical rescue, and specifically relates to an infectious disease patient conveying and isolating unit capable of maintaining negative pressurefor long time. The infectious disease patient conveying and isolating unit comprises an isolation unit cabin, an air inlet filter, exhaust filters, air circulation control systems, a filter replacement additional mechanism and a medical material supplement buffer channel, wherein the air inlet filter is arranged at the head end of the isolation unit cabin, and the tail end of the isolation unit cabin is connected with the medical material supplement buffer channel; the exhaust filters are arranged at the other end of the medical material supplement buffer channel; and the filter replacement additional mechanism and two sets of air circulation control systems are arranged in the medical material supplement buffer channel. Long-time negative pressure continuous maintaining capacity, efficient pathogen gas filtering capacity and the capacity of medical aid materials outside the isolation unit entering the isolation cabin body under the aviation environment condition are achieved, and therequirement for long-time long-distance air transportation and back delivery of infectious disease patients is met.

The invention proposes a method for improving strength of an insulator at a discharging end of an ignition electric nozzle of aviation engine. The total length of the insulator and a central electrodeis maintained unchanged, the size of an insulator part and the size of a central electrode part are changed, and conical-surface matching between the central electrode and the insulator is changed tostraight-surface matching; with regard to the insulator, the discharging end of the insulator is changed to a straight surface to a conical surface, the wall thickness of an end part is increased by0.5 millimeter, the size of an inner hole of the discharging end is Phi 2.8 millimeters, the chamfer angle of the end part is 60 degrees, and the axial length of the chamfer angle at the end part is 0.5 millimeter; a straight table is additionally arranged at an outer circle of the insulator, and the situation that a bottom surface of the shell cannot be completely cleared to cause point contact is prevented; and with regard to the central electrode, the conical surface of the discharging end of the central electrode is changed to the straight surface, and the diameter of the discharging end of the central electrode is Phi 2.8 millimeters. The characteristics of ignition concentration and high efficiency of a sunken structure are maintained, meanwhile, the stress of a discharging end partof the insulator is reduced, the application requirement applicable to the engine environment is met, and a reliable main ignition electric nozzle is provided for the engine.

The invention provides a 3D imaging system and method of an industrial CT. The imaging system comprises an X-ray generator, an arc-shaped detector, a primary conveyer belt and a secondary conveyer belt, wherein the X-ray generator and the arc-shaped detector are opposite to each other; the primary conveyer belt and the secondary conveyer belt are arranged on the same axis; a gap is formed between the opposite ends of the primary conveyer belt and the secondary conveyer belt; the X-ray generator and the arc-shaped detector are arranged in a manner of rotating around the primary conveyer belt and the secondary conveyer belt by taking the gas as the circle center. Through longitudinal section type scanning of the 3D imaging system, relatively long objects such as long-columnar objects of dozens of centimeters to dozens of meters as well as internal materials, meters and elements such as water suction pumps, water conservancy generators, aviation undercarriages, aviation engines, diving gears, underwater searching and rescuing devices, bridge components, aerospace vehicles and underwater moving devices can be relatively easily checked by using the 3D imaging method.

The invention provides a quality control method for a degraded profile in a processing course of a blade of an aviation engine, and is used for solving the problem that profile quality control precision is low in an existing processing course of the blade of the aviation engine. The method comprises the following implementation steps: establishing a coupling prediction model for degraded profile error accumulation in the multi-stage processing course of the blade of the aviation engine; carrying out least square regression on the coupling prediction model for degraded profile error accumulation in the multi-stage processing course of the blade of the aviation engine; carrying out self-closing treatment on profile errors in the processing course of the blade of the engine by using a methodfor predicting residual errors ahead of time; carrying out least square regression on a residual equation of a node process k in the processing course of the blade of the engine; establishing a T2 control chart monitoring model based on clusters; and acquiring a degraded profile quality control result in the processing course of the blade of the aviation engine. The profile quality control precision of the processing course of the blade of the engine can be improved, and the method can be applied to profile quality control in the processing course of the blade of the engine in the field of aviation industry.

The invention discloses an aviation engine bearing nut locking structure. The aviation engine bearing nut locking structure is characterized in that a plurality of slots are formed in a bearing nut and a shaft neck; the aviation engine bearing nut locking structure includes a locking piece of a ring structure; inner and outer ring surfaces are provided with a plurality of internal teeth and external teeth; the internal and external teeth of the locking piece fit with the slots in the bearing nut and the shaft neck, so that the locking is completed; a retaining ring is also arranged in the bearing nut to fix the annular locking piece so that the annular locking piece can be prevented axial withdrawal. According to the aviation engine bearing nut locking structure, the problem that conventional locking pieces have low looseness prevention reliability is solved; compared with the conventional structural deformation locking pieces, the novel structural locking piece has no bending deformation during assembling and testing, the shearing areas are increased, and the ability of looseness prevention of the bearing nut is improved.

The invention belongs to the technical field of aviation medical rescue, and particularly relates to a disinfection device used in an infectious disease patient conveying and isolation unit. The disinfection device comprises a manual pressurizing device and a rotary spray head, wherein the manual pressurizing device is connected with the rotary spray head through a fastening mechanism. The deviceis compact in structural design, high in practicability, good in spraying disinfection effect, large in disinfection area and uniform in spraying range, the spray head rotates automatically, a disinfectant is sprayed in a mist shape, and the use requirement for uniform spraying disinfection at all positions in a buffer channel is met.

The invention relates to a test run worker training system based on aviation engine working condition simulation and a control method, and belongs to the field of engine online inspection. The training system comprises a training machine, a control machine, an engine throttle lever and an operation switch; the control method comprises the steps that 1, a test run worker operation procedure is built; 2, a trainer control system is built; 3, a test run worker operates on the training machine; 4, the trainer controls the system to obtain the training result. Due to the virtual simulation trainingfunction, the material object training operation risk is lowered, the material object training effect can be achieved, the operator master the engine test run skill proficiently, and the emergent processing capability is improved.

The invention relates to a four-rotating-arm multi-degree-of-freedom animal centrifugal machine which comprises a transmission supporting system, a four-rotating-arm system and a double-shaft rotating animal carrying table system. The transmission supporting system supports the four-rotating-arm system to rotate around the horizontal ground with a rotating main shaft as the circle center under the power effect, the four-rotating-arm system comprises a double-shaft rotating animal carrying table system, and a swing plate in the double-shaft rotating animal carrying table system can swing in a reciprocating mode around the axis of a short shaft under the effect of a stepping motor push rod. An electric rotating table is installed on the swing plate and can drive an animal fixing platform to rotate. Through composite superposition of the three motions, a real flight environment is simulated, the centrifugal acceleration and the centrifugal acceleration change rate required by an experiment are met, and the centrifugal machine has the advantages of being simple in structure, reliable in work, low in operation power consumption and the like, is used in experimental research of centrifugal treatment of animals, and is used for solving the animal centrifugal treatment problem in aeronautical medicine experiments.

The invention belongs to the technical field of aviation medicine rescue, and particularly relates to a power assisting opening medical garbage collecting device in a machine-mounted checking box. A medical garbage collecting inner barrel, a cabin door, an outer cabin and a damping spring hinge are included. The device is in a half cylinder shape, one face of the arc is a front face, and the backface is a plane. The medical garbage collecting inner barrel is in a half cylinder shape, one face of the arc is a front face, the back face is a plane, the front face is arranged towards the interiorof the outer cabin, and the back face is connected with the cabin door in a nesting hanging manner. The cabin door is arranged at the lower portion of the back face of the device through the dampingspring hinge. The power assisting opening medical garbage collecting device integrates a popup type garbage collecting device for clinic checking on an air transportation medical care evacuation airplane, the medical garbage collecting inner barrel is firmly fixed and is not prone to toppling, detachment can be rapid, garbage pouring is convenient, an ultraviolet disinfection lamp in the cabin canconduct disinfection and sterilization treatment on the medical garbage, and the pollution problem caused by medical garbage is solved.

The invention discloses an aviation engine thrust detecting device which comprises a base. The base is fixedly arranged on the ground. A test hole is arranged in the middle of the upper surface of thebase. A pressure device is arranged in the base. The pressure device is composed of a sliding member sleeved in the test hole, a pressure plate which is located in the sliding member and is slidablyconnected with the inner surface of the sliding member, pressure sensors which are fixedly connected with the lower surface of the pressure plate and are uniformly distributed under the pressure plate, and a signal connector which is located on the right side of a pressure sensor and is fixedly connected with the lower middle of the right surface of the pressure sensor. A fixation device is arranged above the pressure plate. A fastening device is arranged above the fixation device. The aviation engine thrust detecting device provided by the invention has the advantages of simple structure andhigh practicability.