13results about How to "Reliable start" patented technology

This application belongs to the field of turbofan engine starting design technology, specifically involving a turbofan engine backwind starting method, including: Step 1, identifying whether the turbofan engine is starting under high-speed backwind conditions by whether the low-pressure rotor reverses; if the low-pressure rotor reverses, the turbofan engine is identified as starting under high-speed backwind conditions; Step 2, after identifying that the turbofan engine is starting under high-speed backwind conditions, determining the wind pressure resistance PdX of the turbofan engine starting under high-speed backwind conditions by the low-pressure rotor reverse rotation speed and the correspondence between the low-pressure rotor reverse rotation speed and wind pressure resistance; Step 3, after the low-pressure rotor changes from reverse rotation to forward rotation under the starter motor, reducing the nozzle throat area A8, adjusting the nozzle exit area A9 and vector angle δA9 to shield the nozzle throat, increasing the ignition speed to ignite the turbofan engine, and increasing the fuel supply speed to supply fuel to the turbofan engine, thereby starting the turbofan engine.

This utility model relates to a flow meter calibration device with reusable functionality, belonging to the technical field of flow meter testing equipment. It includes a water storage tank and a metering tank. The water storage tank is connected to workshop production water, and an inlet pipe connects the workshop production water to the water storage tank. A pipeline centrifugal pump is installed between the water storage tank and the metering tank. A pumping pipe connects the pipeline centrifugal pump to the lower part of the water storage tank, and a calibration delivery pipe connects the pipeline centrifugal pump to the upper end of the metering tank. The calibration delivery pipe is equipped with a calibration table and a standard table. It features water conservation and environmental protection, high accuracy, high automation, compact structure, and good operational stability. By using a relatively fixed calibration device, the flow meter calibration process is simplified, achieving more accurate calibration results.

This invention discloses a multi-satellite mission planning system and method, belonging to the field of on-board mission planning. The mission planning module allocates at least one execution satellite for each specified mission based on the mission request, the current orbital information of each satellite, and current resource information, generating a mission planning scheme. When the cloud core node establishes communication with any execution satellite, it generates the corresponding mission instruction and sends it to the edge core node of that execution satellite. When the edge core node establishes communication with the ground terminal, it receives and parses the mission instruction from the ground terminal and registers the timing trigger information to the local timing scheduler. The edge core node, through the local timing scheduler, creates and runs the container image of the corresponding specified mission when the planned execution time arrives, to execute the specified mission. This invention overcomes the problem of mission triggering and timing control being impossible due to the inevitable interruptions and delays in satellite-to-ground communication.

The invention provides a system and a method for producing an organic fertilizer through solid waste three-section horizontal rotary fermentation recycling, and belongs to the technical field of agricultural waste recycling treatment. The problems that when the environment temperature of a traditional single tank is lower than-20 DEG C, the temperature rise of materials is slow, the microbial activity is low, a system seriously depends on high-energy-consumption electric auxiliary heating to maintain operation, and the operation cost is increased are solved. The system comprises a preheating starting tank, a drying deodorization tank, a decomposition deodorization tank and a heat recovery unit, the preheating starting tank, the drying deodorization tank and the decomposition deodorization tank are sequentially connected in the material conveying direction, and the heat recovery unit comprises a first heat exchanger, a second heat exchanger and a heat pump unit. The first heat exchanger is arranged between an air outlet of the preheating starting tank and an air inlet passage of the drying deodorization tank, the second heat exchanger is arranged on an air outlet passage of the drying deodorization tank, and an evaporator inlet of the heat pump unit is connected with the intersection of an air outlet of the second heat exchanger and an air outlet of the decomposition deodorization tank. The method is mainly used for agricultural waste treatment.

This utility model relates to a hybrid control system for a DC motor, comprising a control unit and a drive circuit. The input and output terminals of the drive circuit are electrically connected to the output terminal of the control unit and the DC motor, respectively. The system also includes a Hall effect sensor module and a current sampling circuit. The Hall effect sensor module includes three Hall effect sensors, and its signal output terminal is electrically connected to the first set of signal input terminals of the control unit. The current sampling module includes three sets of differential operational amplifier circuits, with their input terminals electrically connected to the output terminals of the drive circuit and their signal output terminals electrically connected to the second set of signal input terminals of the control unit. This system solves the problem of system failure caused by a single point of failure of the Hall effect sensor through an integrated fault detection and switching mechanism, thereby achieving a balance between reliable startup, high-precision operation, and high redundancy.

The invention provides a converter control method and device, control equipment and a converter, and belongs to the technical field of power supplies. The converter comprises at least one inversion module, and the inversion module comprises a negative direct current switch and a first buffer unit; the first buffer unit comprises a first buffer switch and a first buffer resistor which are connected in series; the left and right sides of the first buffer unit and the left and right sides of the negative DC switch are respectively provided with a first grounding branch and a second grounding branch, and the first grounding branch and the second grounding branch are provided with Y capacitors and are connected with the same reference ground. The method comprises the following steps: when an inversion module is controlled to work, controlling a negative direct current switch to be closed; and after the negative direct-current switch is detected to be closed, the first buffer switch is controlled to be closed. According to the invention, generation of large impact current can be avoided, reference ground voltage bounce caused by the large impact current can be avoided, stable and reliable starting of the inversion module can be realized, and the safety of each device in the inversion module is protected.

A life jacket for sea rescue belongs to the technical field of water rescue equipment and solves the problem of rescue delay caused by the fact that a traditional life jacket cannot automatically and accurately detect a drowning state and a user posture. According to the technical scheme, a water pressure sensor is arranged on a life jacket body, a buoyancy providing device comprises a front buoyancy cavity set, a rear buoyancy cavity set and a gas distribution valve, and an integrated control device processes sensor data through a microprocessor, starts a monitoring mode after detecting water entry and analyzes starting sequence inflation according to posture changes or active struggling; and automatic positioning is carried out and a distress signal is sent when the danger is continued. The device is mainly used for sea drowning rescue.

The application provides a high-compression-ratio ethanol fuel gasoline engine combustion system and a control method thereof, wherein the system comprises: a high-compression-ratio combustion structure with a compression ratio of 14-15, the combustion structure comprises a piston top with an omega-shaped shallow pit structure, and the surface of the piston top is provided with a silicon nitride ceramic coating; a cold start enhancement system comprising a PTC ceramic heating module and a high-energy ignition device; a fuel injection system comprising a high-pressure common rail system and a multi-hole swirl oil injector; and a control system comprising an ECU control unit and a UEGO wide-range oxygen sensor. The high-compression-ratio ethanol fuel gasoline engine combustion system and the control method thereof can realize high thermal efficiency, reliable start at low temperature, stable combustion and low emission.

The application belongs to the technical field of household appliances, and particularly relates to a starting control method of a heat pump water heater, the heat pump water heater and a storage medium, and is used for solving the technical problem of lacking the starting control method of the air source heat pump water heater in multiple different modes. The starting control method comprises the following steps: determining whether the starting condition of the set starting mode is met according to the preset target temperature and the corresponding actual temperature in the set starting mode; if the starting condition of the set starting mode is met, switching the four-way reversing valve to the corresponding communication state according to the set starting mode, and adjusting the first control valve, the second control valve and the third control valve to the preset opening degree. The application can improve the stability and reliability of the heat pump water heater when starting in multiple different modes.

This utility model discloses a filter bucket with a pull-out water-drawing mechanism, including a bucket body and a bucket lid. The bucket lid has an inlet and an outlet. A filter assembly is installed inside the bucket body. A water pump assembly is installed between the outlet and the filter assembly. A pull-out water-drawing assembly is installed between the inlet and the filter assembly for manually drawing water into the bucket body before the water pump assembly is started. The pull-out water-drawing assembly includes a cylinder. The upper end of the cylinder is connected to the inlet, and the lower end of the cylinder is connected to the filter assembly. A piston is installed inside the cylinder, and a one-way valve structure is installed at the piston. A push-pull rod extending out of the bucket lid is connected to the piston. This utility model has the advantage of being able to conveniently complete the water-drawing operation without disassembly.

The utility model relates to a stage lamp with a lamp holder self-preheating function, which comprises a support frame and a lamp holder pivoted on the support frame, the lamp holder is provided with a light emitting lens and a light source emitting light beams towards the direction of the light emitting lens, the lamp holder is also internally provided with a mounting plate, the mounting plate is provided with a light through hole positioned on the light beam path of the light source; the anti-dazzling screen is movably arranged in the lamp holder; the driving device is in transmission connection with the anti-dazzling screen; the driving device drives the anti-dazzling screen to cut into the light through hole so as to prevent the light source beam from emitting towards the light emitting lens; the driving device drives the anti-dazzling screen to cut out the light through hole so as to allow the light source beam to be emitted towards the direction of the light emitting lens. According to the stage lamp with the lamp holder self-preheating function, the self-preheating function in the lamp holder can be achieved, the driving motor in the lamp holder can be conveniently heated in advance in a low-temperature working environment, light rays are prevented from being emitted from the light emitting lens before the driving motor normally operates, and the lighting effect of the stage lamp is ensured.

The invention relates to a cold-resistant diesel engine fuel oil system which comprises a diesel engine, a main oil tank storing 0 # diesel oil and an auxiliary oil tank storing-35 # diesel oil. A fuel inlet of the cooling liquid heater is communicated with the auxiliary oil tank through an oil supply pipeline, and-35 # diesel oil is used as fuel; the diesel oil heater is arranged in the main oil tank and is used for heating 0 # diesel oil in the main oil tank; two ends of the heat conduction pipe are respectively communicated with a cooling liquid tank outlet and a cooling liquid tank inlet of the diesel engine, and are sequentially connected in series with the cooling liquid heater and the diesel heater; after the cooling liquid absorbs heat, the No.0 diesel oil is heated; -35 # diesel oil is used for supplying oil in the starting stage of the diesel engine; in the conventional stage, 0 # diesel is supplied to a diesel engine. The system only consumes a small amount of high-cost-35 # diesel oil in the starting stage, and uses low-price 0 # diesel oil in the main operation stage, so that the long-term use amount of high-grade diesel oil is greatly reduced, and the fuel oil cost is effectively saved.

The invention discloses a portable hinge type hook platform tool for a cargo oil tank. The portable hinge type hook platform tool comprises a supporting frame, a working platform hinged to the lower end of the supporting frame and a connecting assembly connected between the upper end of the supporting frame and the working platform. The supporting frame is provided with a hook with a locking mechanism, the working platform is provided with a sliding groove in the radial direction of the hinge, and a sliding block connected with the tail end of the connecting piece is arranged in the sliding groove in a sliding fit mode. The working platform is characterized in that the sliding groove is sequentially provided with a driving section, a damping section and a fastening section from the hinged end, a flexible rod penetrating into the sliding groove is arranged on the side portion of the supporting frame, and when the working platform is unfolded from the folded state, the flexible rod rebounds to push the sliding block to slide along the sliding groove; the damping section enables the sliding block to move stably and decelerate, and the fastening section is provided with an automatic locking mechanism which is triggered by the inclined face of the sliding block and composed of a check block and a reset spring. Automatic linkage of the whole process from platform unfolding to sliding block locking is achieved, and the deployment efficiency of local high-altitude operation in the cargo oil tank is improved.