48results about How to "Eliminate the risk of failure" patented technology

The present invention discloses a locomotive axle end permanent magnet synchronous generator. The locomotive axle end permanent magnet synchronous generator comprises a base, a stator pressed inside the base, a rotor and an end cover which is arranged at the tail end of the base; the base is fixedly connected with the axle box of a locomotive bogie; the rotor is arranged in the stator and is fixedly connected with the axle of a locomotive; the rotor adopts permanent magnet excitation and is of a hollow cup structure; and the base and the end cover can form a sealing structure for the stator and the rotor. When the locomotive is running, wheels rotate, and the axle rotates and drives the rotor to rotate, and the permanent magnet synchronous generator generates electrical energy. With the generator of the invention adopted, the technical problem that effective power source cannot be provided for a driver's cab in the de-energized transportation of the locomotive can be solved. The structure of the generator is greatly simplified, the weight of the generator is reduced, the malfunction risk of the bearing of the generator can be eliminated, and the generator is more reliable.

Disclosed is a GOA driving circuit. In screen awakening stage, the first global control signal (Gas1) controls the twelfth thin film transistor (T12) to be activated for realizing the All Gate On function, and meanwhile controls the eleventh thin film transistor (T11) to be activated to pull down the voltage level of the second node (P(n)); in reset stage, the reset signal (Reset) controls the first thin film transistor (T1) to reset the voltage level of the second node (P(n)), and to set the duration of the single pulse of the reset signal (Reset) to be at least the sum of durations of initial pulses of the first, second clock signals; in touch scan stage, the second global control signal (Gas2) controls the thirteenth thin film transistor (T13) to be activated to make the output ends of the GOA units of the respective stages output composite signals (CS).

The invention relates to a lighting unit for lighting airfields on an airport, in particular for delivering signals to an airplane. It comprises a light source, which has at least one light-emitting diode (4) for generating light to be emitted, electrical components (5) for supplying and actuating the light source, optical components (7) for influencing the light generated by the light source, and an outer housing (11, 12) for receiving the light source and the electrical and optical components, which has a light exit opening (14) through which light influenced by the optical components exits. According to the invention, the light source is arranged with the electrical and optical components (5, 7) in a cassette module (1) closed in a gas-tight manner. Said module is integrated in the outer housing, wherein the outer housing is likewise closed in a gas-tight manner, so that the components disposed in the cassette module have double sealing protection.

A power capacitor including at least one capacitor element enclosed in a container, wherein the container is of a material which substantially includes a first polymer material. Further, the container is cylindrical and provided in its surface with creepage distance extending protrusions of a second polymer material. The protrusions are formed with respect to their thickness and radial length so as to cool the capacitor. In a method for manufacturing such a power capacitor, a substantially cylindrical container is made of a material which substantially includes a first polymer material. The container is provided on its envelope surface with creepage distance-extending protrusions of a second polymer material and the capacitor elements are encapsulated in the container.

The invention discloses an IP address list matching method and device, and relates to the technical field of network communication. The method comprises the following steps of S1, obtaining an IP address list, wherein the IP address list is of a two-way chain table structure, and nodes in the two-way chain table are sequentially connected according to the size sequence of IP addresses; S2, conducting matching on the IP addresses to be matched and the IP address list to obtain the matching result. The IP address list is arranged to be of the two-way chain table structure, the nodes in the two-way chain table are sequentially connected according to the size sequence of the IP addresses, due to the fact that the nodes in the two-way link table are in a discontinuous memory, the memory use efficiency of network equipment is improved, and risks caused by failure distribution of large segment continuous memory space are removed.

The present invention provides an engine control method, which comprises: receiving an indication of the pedal position; pre-processing the indication of the pedal position to determine whether the received indication of the pedal position corresponds to the antisurge mode activation condition; in response to the received indication of the pedal position corresponding to the antisurge mode activation condition, using the boost pressure and the engine speed to look up the static control parameter lookup table to select a control parameter indicating an air flow requirement; and sending the selected control parameter to the ECU so as to control the engine using the air flow requirement indicated by said control parameter.

Device for automatically mounting and dismantling tools (10) on a robot (16), comprising means (1) for storing a number of identical fresh tools (10) and means (11) for centering one of these tools (10) in a position for automatic mounting on the robot (16), each tool (10) comprising an axial orifice for mounting on a rotating pin (15) provided on the robot (16).

The invention relates to a piston, and a piston copper bush installation method and installation device. The piston includes a piston body and a copper bush; pin boss holes and a pin boss crotch are formed in the piston body; clamping bosses are arranged on the copper bush; clamping grooves are formed in the pin boss holes; the clamping bosses and the clamping grooves are snapped onto each other; and the copper bush and the pin boss holes form an interference fit. The installation method includes: S1, performing cleaning and drying; S2, performing freezing; S3, performing positioning; S4, performing jacking and translating; S5, jacking the copper bush into a corresponding pin boss hole; S6: performing demounting; and S7: keeping a circulation from the step S3 to the step S6. The installation device includes a copper bush clamp, a copper bush positioning jacking member, a piston positioning member, copper bush pushing members and a rack; the rack includes two side plates, a bottom plate, an intermediate plate and a top plate; the piston positioning member is connected to the top plate; a stopping disc is arranged in the intermediate plate; the copper bush positioning jacking member is connected to the bottom plate; the copper bush clamp is positioned on the top of the copper bush positioning jacking member; and the copper bush pushing members are connected to the two side plates respectively. The installation device is unique, simple and reliable in structure, and can effectively eliminate failure risk due to falling of copper bushes.

The invention is applicable to the technical field of machines, and provides a bolt machining method and a bolt machined by the bolt machining method. The bolt machining method comprises the steps that A, a predetermined raw material to be manufactured into the bolt is subjected to cold heading machining so that the head of the bolt is formed and a rod part of the bolt is preformed, the first radius of a transition arc of the connection part of the head and the rod part of the bolt is increased, and thus a preformed bolt is manufactured; B, the heat treatment temperature is increased for carrying out heat treatment on the preformed bolt to improve the yield strength of the preformed bolt; and C, the preformed bolt subjected to the heat treatment is subjected to thread rolling machining sothat the rod part of the bolt is formed, the second radius of an arc of the root of the thread in the rod part of the bolt is increased, and thus the bolt is manufactured. By doing so, the service life of the bolt is prolonged to the stress-number of cycles N which is equal to 107.

The invention provides an active and passive combined planet vehicle automatic docking system. The system comprises a capturing end and a captured end which are arranged on the two sides of a planet vehicle. The capturing end comprises a capturing end connecting flange fixedly connected with the side face of the planet vehicle, a capturing end docking frame vertically and fixedly connected to thecapturing end connecting flange, and at least two capturing rod assemblies arranged on the periphery of the capturing end connecting flange; the captured end comprises a captured end connecting flangefixedly connected with the side face of the planet vehicle, a structure barrel vertically and fixedly connected to the captured end connecting flange, a docking flange in lap joint with the end of the structure barrel, a corrugated sealing barrel arranged outside the structure barrel in a sleeving mode and with the two ends fixedly connected with the captured end connecting flange and the end face of the docking flange respectively, and an elastic pull rod assembly. The capturing end actively implements docking, the driven end is used for passively receiving docking, the number of driving devices is small, and the manufacturing cost and the control difficulty can be effectively reduced; and the adaptability to topographic conditions is high.

The invention discloses a hydrogen elimination system of a nuclear power plant concrete containment. The system comprises the following parts: a hydrogen monitoring subsystem, which is for monitoring the concentration of hydrogen inside the concrete containment and sending an alarm signal when the hydrogen content reaches or exceeds a preset alarm value; an automatic hydrogen addition subsystem, which is for receiving the alarm signal from the hydrogen monitoring subsystem, adding hydrogen into an automatic hydrogen-oxygen recombination subsystem according to the alarm signal and sending an ignition signal; and the automatic hydrogen-oxygen recombination subsystem, which is for receiving the ignition signal and the added hydrogen from the automatic hydrogen addition subsystem, preparing for hydrogen-oxygen recombination according to the ignition signal, and reducing the hydrogen content in the concrete containment when the hydrogen content reaches blasting concentration through the controlled combustion. Compared with the prior art, the system automatically carries out elimination of hydrogen, controls the hydrogen content in the concrete containment in a safe range under the conditions of normal operation and basis accident, so as to avoid hydrogen blasting accident.

The invention relates to a device which prevents or displays the usage without permission or the stealing of electric vehicles, in particular to an anti-theft alarm of no power supply locks with batteries or without batteries of the electric bicycle. The invention solves the problems of battery loss, more complex installation and replacement and easy damage which are caused by an accumulator or an additional alarming cell required to be connected with the anti-theft alarm horn of the existing electric bicycle. The technical proposal of the invention comprises an accumulator which is inserted into and locked on a frame or under a saddle, a power lock which is arranged in the middle of the bicycle handle or beside the accumulator, an instrument disc which is arranged in the middle of the bicycle handle, regulating rotary handles and brake handles which are arranged at the two ends of the bicycle handle, a power controller which is arranged in the instrument disc or at the upper part of a middle shaft and a DC motor which is arranged on a bicycle wheel. The invention is characterized in that the power control box is also provided with an anti-theft alarming controller and an alarming horn which are connected by wiring harness and inserts.

The invention provides a micro-leakage detection method. The micro-leakage detection method comprises the following steps that S1, an area where micro-leakage possibly occurs in a product is judged; S2, a foaming agent is used for spraying the area before the sealing performance test; and S3, during sealing performance test, thermal imaging equipment is adopted to monitor whether a bubbling phenomenon exists in the spraying area in the whole process, and if the bubbling phenomenon exists, the product is judged to be unqualified. The method has the advantages that the foaming agent is used in cooperation, micro leakage which cannot be found by a traditional sealing performance detection technology can be detected, the failure risk of the micro leakage in the sealing piece is eliminated, the position where the micro leakage occurs can be accurately detected, and the direction is pointed out for follow-up production improvement.

Liquid injected screw compressor with an inlet valve (6) and blow-off valve (19); a liquid circuit (20) with injector (22); a controller (35) for the transition from unloaded to loaded, whereby when unloaded the inlet valve (6) is closed and the blow-off valve (19) is open, and when loaded the inlet valve (6) is open and the blow-off valve (19) is closed, and whereby during an aforementioned transition, when the injection pressure (p22) is below a minimum threshold, the inlet valve (6) remains closed and is opened with a certain delay (tB-tA) and that there are means to gradually increase the injection during this delay (tB-tA) and to open the inlet valve (6) when the injection pressure (p22) has reached the minimum threshold.

The invention provides a detection method and system of a function safety system, electronic equipment and a storage medium, and the detection method comprises the following steps: sending a preset detection parameter to a hardware test device through a software platform, wherein the hardware test device is connected with the software platform through a communication network; the hardware testing device receives the detection parameters and then sends the detection parameters to the function safety system, wherein a function module in the function safety system is electrically connected with the hardware testing device; one part of diagnostic data generated by the functional security system based on the detection parameters is fed back to the software platform by the hardware testing device, and the other part of the diagnostic data is fed back to the software platform by the functional security system; and the software platform analyzes the diagnosis data, generates a detection report of the functional safety system according to an analysis result, and further provides suggestions according to the detection report. Therefore, the potential failure risk in the functional safety system can be effectively eliminated, and the safety integrity capability of the system is improved.

The invention discloses a metal dot matrix reinforced ablative material sandwich plate structure which is characterized in that an integrally formed metal dot matrix sandwich plate is used as a framework, a force bearing structure and a heat-proof structure are organically combined, and a connecting interface between functional structures is eliminated; the force bearing structure adopts a metal dot matrix sandwich plate structure form, and provides more efficient mechanical properties than a traditional sandwich structure; a base body of the heat-proof structure is made of a low-density ablation-resistant high polymer material, and a reinforcing body is made of a metal dot matrix core, so that the mass ablation rate of the heat-proof structure can be effectively reduced; and the phase-change material is packed in the sandwich plate of the bearing structure, so that local high temperature caused by thermal short circuit of the metal dot matrix can be further relieved. On the premise of the same bearing capacity, a lighter structural form can be provided, and the risk of interface connection failure of the heat-proof structure and the force bearing structure under the pneumatic thermal scouring condition can be eliminated.

The invention discloses a liquid level control system and method for a nuclear power plant circulation water pump pit. The system comprises a main submersible sewage pump (1) with a first liquid levelswitch (11) and a standby submersible sewage pump (2) with a second liquid level switch (21), wherein the first liquid level switch is used for starting the main submersible sewage pump when the liquid level value in the pump pit is greater than or equal to a second liquid level value, or shutting down the main submersible sewage pump when the liquid level value in the pump pit is smaller than orequal to a first liquid level value, and the second liquid level value is greater than the first liquid level value; and the second liquid level switch is used for starting the standby submersible sewage pump when the liquid level value in the pump pit is greater than or equal to a fourth liquid level value, or shutting down the standby submersible sewage pump when the liquid level value in the pump pit is smaller than or equal to a third liquid level value, and the third liquid level value is smaller than the fourth liquid level value but greater than the second liquid level value. Accordingto the system provided by the invention, the liquid level in the pump pit is controlled by multiple gears, the situation that water flows into a bearing chamber of a circulation water pump when the liquid level in the pump pit is too high is prevented, and the risk of damage to the circulation water pump is eliminated.

The present invention relates to a self-locking rivet (1) for connecting dissimilar materials and a method for connecting dissimilar materials using the same. The self-locking rivet comprises a rivethead (1.1) and a cylindrical rivet leg (1.2) which extends out from one side surface of the rivet head to the far side. The self-locking rivet is characterized in that the rivet leg (1.2) is configured such that the outer side surface of the rivet leg (1.2) is inclined outward at least in one section in an extension from the root of the rivet leg to the free end of the rivet leg (1.2) such that there is a certain gap e between the root of the rivet leg and a upper layer connecting material (2).

The invention relates to a piston, and a piston copper bush installation method and installation device. The piston includes a piston body and a copper bush; pin boss holes and a pin boss crotch are formed in the piston body; clamping bosses are arranged on the copper bush; clamping grooves are formed in the pin boss holes; the clamping bosses and the clamping grooves are snapped onto each other; and the copper bush and the pin boss holes form an interference fit. The installation method includes: S1, performing cleaning and drying; S2, performing freezing; S3, performing positioning; S4, performing jacking and translating; S5, jacking the copper bush into a corresponding pin boss hole; S6: performing demounting; and S7: keeping a circulation from the step S3 to the step S6. The installation device includes a copper bush clamp, a copper bush positioning jacking member, a piston positioning member, copper bush pushing members and a rack; the rack includes two side plates, a bottom plate, an intermediate plate and a top plate; the piston positioning member is connected to the top plate; a stopping disc is arranged in the intermediate plate; the copper bush positioning jacking member is connected to the bottom plate; the copper bush clamp is positioned on the top of the copper bush positioning jacking member; and the copper bush pushing members are connected to the two side plates respectively. The installation device is unique, simple and reliable in structure, and can effectively eliminate failure risk due to falling of copper bushes.

A method for protecting a circuit is provided, wherein the circuit comprises a plurality of switch devices connected in series. The method comprises detecting a failure risk indicator of each switch device; determining whether each switch device has a failure risk based on the corresponding failure risk indicator; and making each of the switch device(s) having the failure risk in a constant on-state to eliminate the failure risk and prevent a failure of the switch device optionally if a number of the switch device(s) which have or had the failure risk is less than or equal to a preset value.

The invention belongs to the technical field of pressure suppression cooling systems and particularly relates to a pressure suppression cooling system suitable for a small reactor. The upper part of acontainment shell is a hemispherical steel dome, the lower part of the containment shell is a cylinder, and the upper part of the containment shell is isolated from the lower part of the containmentshell by a steel plate; the cylinder is internally provided with an annular water tank, the outer round edge of the annular water tank is hermetically connected with the inner wall of the cylinder, the inner circle of the annular water tank is concave downward to form a barrel-shaped space, and a space between the outer surface of the annular water tank and the lower surface of the steel plate forms a dry well; a space between the inner surface of the annular water tank and the bottom surface of the cylinder forms a wet well. A pressure vessel is placed in the barrel-shaped space, a pluralityof cooling boxes are arranged on the outer surface of the annular water tank, and ice is loaded in the cooling boxes. After the pressure of the dry well is increased, upper cover plates of the coolingboxes are opened to cool the dry well; after the ice melts, valves at the bottoms of the cooling boxes are switched on, cooling water in the wet well is injected into the bottom of the dry well to submerge the pressure vessel for cooling, and a reactor core is prevented from being melted.

The invention discloses a movable active air-inlet grille system which comprises a grille frame body, a cover plate and a driving mechanism, a grille body is arranged in the grille frame body, and the cover plate is installed on the front side of the grille body and can shield the grille frame body; the cover plate is connected with a driving mechanism, and the driving mechanism can drive the cover plate to open or close the grating frame. According to the active air inlet grille, opening or closing of the grille is achieved through integral movement of the cover plate, the situation that the air inlet area is shielded by the characteristics of a blade type structure is avoided, the air inlet efficiency of the active air inlet grille is improved, meanwhile, the failure risk of abnormal sound howling is eliminated, and the requirements of users for different shapes of the grille body can be met.

The invention discloses a photovoltaic array liquid cooling system. Assembly modules can be flexibly connected in series and in parallel by adopting independent modular liquid cooling plates, the flow channel resistance is small, installation and construction are easy, the operation and maintenance cost is reduced, and the purchase cost of parts is reduced through modularization and standardization; the heat-conducting silica gel pad is adopted to eliminate uneven cold and hot temperature of the photovoltaic module caused by the cooling flow channel, so that the performance of the module is stabilized and the generating capacity is improved; an independent centralized cooling water tower is adopted, no heat exchanger needs to be additionally arranged, the burden of an assembly square matrix is reduced, and the fault risk is greatly eliminated; the reservoir has a water purification function, so water quality is improved, blockage of a loop pipeline is avoided, and through scale generation of a liquid cooling plate, cooling power is reduced; and the independent photovoltaic power supply system can automatically and synchronously work with a cooling circulation system of a photovoltaic power station.

The invention relates to a method for determining the polarity of the poles of a rotor (3) of a rotating electrical machine (1) having an estimated position relative to the stator, said method comprising the steps of: a) applying an excitation voltage to said the stator to successively generate two different magnetic fluxes within the saturable magnetic region of said pole, one flux coincident with and the other flux opposite to that of the magnet, so as to cause the magnetic flux to at least one of said fluxes saturating the saturable magnetic region; and b) determining the polarity of the magnetic poles based on a difference in time evolution of currents generated in the stator by the two magnetic fluxes.

The invention discloses a supporting assembly used for supporting a central rotating shaft in a gas turbine, a front-stage wheel disc (7) and a rear-stage wheel disc (8) are assembled on the central rotating shaft (1) in the axial direction, the supporting assembly comprises a supporting body and an adjusting assembly used for adjusting the rigidity of the supporting body, and the supporting body is supported between the front-stage wheel disc (7) and the rear-stage wheel disc (8). The adjusting assembly is movably connected with the supporting body. When the frequency of the central rotating shaft (1) does not meet the requirement, the adjusting assembly can be adjusted to enable the supporting assembly to generate elastic deformation, so that the rigidity of the supporting assembly and the frequency of the central rotating shaft (1) are adjusted, and the vibration amplitude of the central rotating shaft (1) is reduced to meet the dynamic requirement of the gas turbine in the testing or operating process.

The invention belongs to the field of machine manufacturing, particularly relates to a heavy adjustable rotary mechanical arm for pressing and a method, and provides the following scheme aiming at the problem of insufficient means in the prior art: the heavy adjustable rotary mechanical arm comprises a base, a main arm, a support arm and a lock mechanism, the base comprises a support, a rotating shaft sleeve with an oil groove and a nut with a shoulder, the base is connected with one end of the main arm through a rotating shaft sleeve with an oil groove, the other end of the main arm is provided with a U-shaped opening, one end of the supporting arm and the lock mechanism are wrapped in the U-shaped opening of the main arm, the design of brand new technological equipment embodies the mechanical / non-mechanical interaction requirement, switching between a pneumatic locking mode and a mechanical locking mode is provided for the mechanical arm in the working state, and the mechanical arm is convenient to use. And the failure risk after the mechanical arm presses the workpiece is eliminated, and the manual operation risk in the workpiece machining process is reduced. The process equipment is obvious in effect after being used and verified in a workshop, and the manufacturing requirements of products are met.