57results about How to "Meet life requirements" patented technology

In a turbine bucket having an airfoil portion and a root portion with a substantially planar platform at an interface between the airfoil portion and the root portion, a platform cooling arrangement including a cavity extending along the forward portion of the platform, and at least one inlet bore extending from a source of cooling medium to the cavity, and at least one outlet opening for expelling cooling medium from the cavity.

The invention provides a service life evaluation method for bus electrolytic capacitors of a motor driver. The method comprises the steps: testing the core temperature of each bus electrolytic capacitor of a driver and the working environment temperature by means of a temperature-sensitive technology, selecting the highest core temperature rise [Delta]T among the electrolytic capacitors, and calculating the core temperature T2 of the electrolytic capacitors when the driver is running in a condition with the upper limit environment temperature. The service life of the bus electrolytic capacitors is calculated according to the difference between the highest allowed core temperature and the T2 as well as correction coefficients of bus voltages, so the service life of the driver can be evaluated. According to the method, the influence brought by the difference between an actual temperature upper limit for a driver and a test environment temperature, the influence of bus voltage when the driver is in use and the influence of uneven temperature rises among bus electrolytic capacitors are all taken into consideration. Aspects are comprehensively considered by the method, and an evaluation result is reliable.

An analog device with parallelly connected redundant inputs is composed of a frame consisting of three panels perpendicular to each other, an analog platform, at least three interface modules connected perpendicularly to said three panels, and the drivers relatively connected to said interface modules. The said interface module is a mechanical one consisting of guide track, slide table, connecting rod and driver. Its advantages are simple structure, easy control and long service life.

The invention discloses an electric steering engine capable of resisting large bending torque. The electric steering engine capable of resisting the large bending torque comprises a harmonic speed reducer, an output shaft and a connection assembly, wherein the output shaft is fixedly connected with an output steel wheel of the harmonic speed reducer, and the connection assembly is arranged between the output shaft and a load, used for transmitting torque and fixedly connected onto an elastic body. According to the electric steering engine, the connection assembly additionally arranged between the output shaft and the load is used for transmitting the torque and fixedly connected onto the elastic body, so that the connection assembly bears the bending torque from the output shaft. By utilizing the elastic body to unload the bending torque, separation of a carrying object of the bending torque of the electric steering engine is achieved, and the output shaft is only responsible for transmitting the torque. Therefore, the electric steering engine has the advantages of being resistant to the large bending torque, high in reliability and strong in bearing capability, avoids radial displacement of the output shaft under the effect of the being torque, and meets the requirement for long service life of middle-long distance high-altitude air vehicles. The invention further discloses an air vehicle applying the electric steering engine capable of resisting the large bending torque. The air vehicle is high in reliability, long in service life and especially suitable for middle-long distance flight.

The invention relates to a parallel-type six-dimensional-output twenty-eight-input redundant fault-tolerant driving simulator which comprises a working platform, three panels, four four-input single-output redundant driving mechanisms and two six-input single-output redundant driving mechanisms. The three panels are mutually perpendicular pairwise, one end of each four-input single-output redundant driving mechanism is fixed on a panel, the other end of each four-input single-output redundant driving mechanism is fixed on the working platform, one end of either six-input single-output redundant driving mechanism is fixed on the panel, and the other end of either six-input single-output redundant driving mechanism is fixed on the working platform. The invention has simple structure and easy control, can obtain greater power by utilizing parallel input, and each interface has the redundance of 4-6 redundant motors so that each motor has lowered power requirements and can differentially output to reach great power and multiple redundant interfaces. Because of adopting the modularized design, the extendibility is strong.

The invention provides an electromagnetic shielding method of satellite cables. The method includes the steps that first, electromagnetic wave shielding fabric and a bonding material are tested; numbers of the cables in which shielding processing is needed and a number of an electric coupler are recorded; the electromagnetic wave shielding fabric is tailored according to different cables, and the bonding material is bonded on the edge of the electromagnetic wave shielding fabric; the electromagnetic wave shielding fabric is bonded on a bunch of cables, so that a cable segment shielding layer is formed; the electromagnetic wave shielding fabric and Teflon thin films are manufactured into an electric coupler template according to the size of the electric coupler; the electric coupler template is wound outside the electric coupler to form an electric coupler shielding outer layer; the electromagnetic wave shielding fabric coating the electric coupler is erected on the outer layer of the bunch of cables; the Teflon thin films are wound outside the electric coupler coated with the electromagnetic wave shielding fabric and outside the bunch of cables, and the cable assembly after being coated is tested. The electromagnetic shielding method of the satellite cables has the advantages of effectively lowering the weight of satellite borne cables, and improving the EMI performance and reliability of the satellite cables.

The invention belongs to the field of aero-engine fuel oil systems, and relates to a piston device with a speed response mechanism. The piston device comprises a shell and a piston mounted in the shell, the shell is provided with a work oil path inlet and a work oil path outlet, the piston is provided with an annular work oil path channel, the piston comprises a piston head and a flow adjusting type piston base fixedly connected with the piston head, an adjusting oil path inlet and an adjusting oil path outlet are formed in the shell, the adjusting oil path inlet communicates with the adjusting oil path outlet through the flow adjusting type piston base, when the adjusting oil path outlet is closed, the piston head can move in the shell in the axial direction of the shell, the work oil path inlet communicates with the work oil path outlet through an annular work oil path channel, when the adjusting oil path outlet is opened, the piston head moves in the shell in the axial direction ofthe shell, and the work oil path inlet and the work oil path outlet are disconnected. The oil supply rate of a product during the ignition period can be ensured, and after ignition, normal work is achieved.

The invention provides a drive axle for a suspension type monorail vehicle bogie. The drive axle comprises a motor, a coupler, a main speed reducer, a differential mechanism, a wheel transmission device, a drive axle shell and an accessory; the motor is connected with the coupler, the coupler is connected with the main speed reducer, the main speed reducer is connected with the differential mechanism, and the differential mechanism is connected with the wheel transmission device; power input by the motor is transmitted to the main speed reducer through the coupler to be coupled to amplify the torque, and then is output to the wheel transmission device after the differential mechanism balances the rotating speed torque; a wheel hub drives a vehicle. The drive axle for the suspension type monorail vehicle bogie provides large power, large torque and high rotating speed, is resistant to strong impact and extreme environments, low in weight and high in reliability, and has the service life of 30 years.

The invention discloses a backlight control method of an instrument. The method includes a first step of conducting a power-on self-test and storing health state data, produced through the self-test result, of each LED lamp, a second step of selecting the LED lamps for use according to the self-test result in the first step, and a third step of conducting working process monitoring, conducting real-time monitoring on the LED lamps in a working state, and storing the monitoring data. The invention provides the control method with the long service life for instrument backlight design, the service life of an LED is made to meet the requirement for product service life, the reliability of backlight is also guaranteed, and the poor performance that the LED lamps flicker in a backlight situation can be effectively avoided.

The invention discloses a one-dimensional silver cluster coordination polymer. The molecular formula of the one-dimensional silver cluster coordination polymer is [Ag(CS<0.5>N<0.25>H<1.25>)<4>]<n>, wherein n is a positive integer, and CS<0.5>N<0.25>H<1.25> is a 4-pyridine protonated thiol ligand. The invention also discloses a preparation method of the one-dimensional silver cluster coordination polymer. The one-dimensional silver cluster coordination polymer is prepared through in-situ synthesis of a soluble silver salt and 4,4'-dithiopyridine ligand under microwave reaction conditions, has the advantages of usage of easily-available raw materials, simple and feasible reaction operation, no need for inert gas shielding, high reaction yield, capability of realizing batch production and thelike, and is expected to be applied to luminescent materials in luminescent devices.

The invention discloses a preparation method of a magnesium oxide secondary emitter. The method is characterized in that metal nickel, silver and a silver-magnesium alloy are used as target materials and are alternately sputtered on the surface of an emitter to obtain a composite transition layer, the matrix emitting electrode of the composite transition layer and an evaporation source made of a volatilizable organic magnesium salt and alumina powder are put into vacuum equipment respectively, after vacuumizing, the evaporation source is heated to 200-300 DEG C, the matrix emitting electrode is heated to 600-900 DEG C, then oxygen and nitrogen are filled to sensitize the composite layer on the surface of the emitting electrode in an oxygen atmosphere, and the magnesium salt is decomposed on the surface of the emitting electrode and reacts with the oxygen to generate magnesium oxide which is directly attached to the surface of the matrix, so that the magnesium oxide secondary emitter is prepared. According to the manufacturing method of the secondary emitter of the electron multiplier for the cesium-beam tube, the manufactured magnesium oxide film is more compact and firmer, and the electron multiplier assembled with the secondary emitter can meet the requirement for long-time continuous use of the cesium-beam tube and the requirement for the service life of the cesium-beam tube.

The invention discloses a high-reflection high-barrier solar cell backboard film which comprises a middle PET base film, a first coating and a second coating, wherein the first coating and the second coating are arranged on the upper surface and the lower surface of the PET base film respectively, the first coating comprises fluorine resin doped with Ag-MOFs material coated titanium dioxide, and the doping amount of the Ag-MOFs material coated titanium dioxide accounts for 30-40wt% of the mass of the first coating layer. The high-reflection and high-barrier solar cell backboard film is good in overall performance consistency and not prone to local defects, the film layer of the high-reflection and high-barrier solar cell backboard film not only has high reflectivity and high water vapor barrier performance, but also has excellent performance of high temperature, weather resistance, wear resistance, impact resistance and the like, and the service life requirement for long-term use in severe environments is met.

The invention discloses a protection method and device for a drilling tool mark. According to the protection method and device for the drilling tool mark, a marking groove is machined on the outer circle of a high-strength section of a drilling tool in the axis direction through a common standard rod milling cutter, and the drilling tool mark is printed on the groove bottom; the drilling tool mark is covered with a sealing piece corresponding to the marking groove in shape, and a leaf spring with teeth at the two ends is clamped into the marking groove so as to prevent the sealing piece from falling off. By means of the protection method and device for the drilling tool mark, drilling tool information can be conveniently printed, and the original information of the position of the mark can be preserved for a long time. The requirement for the service life of all drilling tools and tools composing a drilling stem system can be met. The sealing piece can perform the action of preventing abrasion and slurry corrosion, and thus the original information in the marking groove is better protected. The accuracy of use records is ensured. Safe use of the drilling stem system is ensured to the maximum, the occurrence rate of drilling failures is reduced, and additional drilling cost caused by handling drilling failures is reduced. The device can be reused.

The invention provides a rolling bearing reliability design method based on a stress-strength interference model, which considers the dynamic behavior of a rolling bearing, processes the load into a random process, converts the reliability index into the allowable range of the equivalent dynamic load of the rolling bearing based on the stress-strength interference model, and improves the reliability of the rolling bearing. And according to the reasonable value of the allowable range of the equivalent dynamic load, bearing parameters are optimized in combination with a bearing design formula, so that the requirements of the target service life and the reliability are met under the working condition. Dynamic reliability emphasizes that the operation evolution of a mechanical product is a dynamic behavior, damage can influence the dynamic characteristics of the mechanical product, and the dynamic behavior inevitably influences the reliability or failure rate of the mechanical product. The dynamic characteristics of the rolling bearing are considered, so that the dynamic reliability design of the rolling bearing is more accurate, and optimization is more effective.

The roller bearing comprises an outer ring, two inner rings, tapered rollers and a metal sealing check ring, an annular convex cone is designed on the inner side of the outer ring, the two inner rings are the left inner ring and the right inner ring respectively, annular roller paths inclining inwards are designed on the outer sides of the left inner ring and the right inner ring respectively, and the outer side of the outer ring is provided with an annular convex cone; tapered rollers are filled between the outer ring and the left inner ring as well as between the outer ring and the right inner ring; metal sealing check rings are mounted on two sides between the outer ring and the left inner ring as well as between the outer ring and the right inner ring; and the outer ring and the metal sealing check ring are fixedly mounted together through a check ring for a hole. The invention has the advantages that the design is ingenious, the structure is compact, the two groups of relatively inclined full complement tapered rollers do not use a retainer, and the assembly quantity is maximized, so that the maximum load bearing capacity is realized; the position of the inner ring can be kept through the hole check ring and the metal sealing check ring, and it is guaranteed that the double-row full-complement tapered roller bearing cannot be separated before installation; and meanwhile, good sealing of the roller bearing is realized.

The invention relates to a movable suction box, and belongs to the technical field of dust collection equipment. The movable suction box comprises a box body (1), wherein the front end of the box body (1) is sealed, and a connection opening (7) is formed in the rear end of the box body (1); a linear guide rail (2) is arranged in the box body (1) along the horizontal direction; a sliding air pipe (3) is arranged on the linear guide rail (2); the front end of the sliding air pipe extends out of the box body (1) and is provided with an annular suction nozzle (4); a cylinder (5) is arranged between the box body (1) and the sliding air pipe (3) or the annular suction nozzle (4) in a connection manner; under the action of the cylinder (5), the sliding air pipe (3) can do reciprocating motion on the linear guide rail (2). The movable suction box disclosed by the invention is simple in structure and can meet the requirements on pipeline sealing during quick moving of the suction nozzle and the service life.