199 results about "Heat engine" patented technology

The invention provides a spindle constant-temperature AI closed-loop heat engine system, and relates to the technical field of numerical control machine tool control and heat management. The invention aims to solve the problems of response lag, uncontrollable thermal stress, single heating strategy and the like of the traditional spindle heat engine method. The system comprises a multi-dimensional thermal state sensing module used for constructing a multi-node discrete temperature field representing the overall thermal distribution of the main shaft; the real-time heat balance feedback module is used for judging the cold / hot starting state of the main shaft according to the initial temperature difference and executing a differentiated feedback control strategy; and an AI prediction forward compensation module that predicts a future cutting thermal load by pre-reading a machining instruction and generates a feedforward thermal compensation instruction. According to the method, the thermal stress is controlled by introducing the radial thermal gradient index as the safety constraint, negative precooling or positive preheating is achieved in combination with the AI predictive capacity, a feedback and feedforward composite control mode is formed, and the dynamic thermal stability and the machining precision of the main shaft under the complex working condition are improved.

The present disclosure provides a solution for a system and a method for converting heat into work. The solution makes use of a nozzle, in which pressurized heat transfer liquid (HTL) and a Liquid-Vapor-Phase-Changing (LVPhC) working fluid is about the same pressure are mixed to form a LVPhC-HTL mixture, which in turn undergoes evaporation and isothermal or quasi-isothermal expansion while flowing in the nozzle that results in acceleration of the mixture. The accelerated mixture is ejected from to thereby rotate a turbine and produce work from the generated kinetic energy. The LVPhC is separated from the mixture and condensed after its ejection from the nozzle and its pressure is elevated back to the working pressure in the nozzle. The present solution exploits the thermodynamic advantages of each phase of the LVPhC.

The present application relates to a flue gas low-heat recovery system based on reverse Brayton cycle heat pump energy storage and a control method thereof, and belongs to the technical field of heat pump energy storage peak shaving of heat engine units. The system comprises a boiler module, a high-heat cycle module and a low-heat cycle module, and realizes the hierarchical utilization of high-grade and low-grade flue gas low-heat through collaborative operation. The flue gas of the boiler module is coupled with the high-heat cycle module through a molten salt heat exchanger, and the low-heat cycle module utilizes the low-heat of the flue gas to generate power through an organic Rankine cycle. The high-heat cycle module stores electric energy and thermal energy during off-peak hours and releases energy during peak hours, thereby improving the peak shaving capacity of the system. The present application realizes the deep integration of efficient recovery of flue gas low-heat and energy storage technology, significantly improves the energy utilization efficiency, system flexibility and economy, and has environmental protection and sustainable development benefits.

The invention discloses an engine oil temperature control lubricating system for a hybrid electric vehicle, and belongs to the field of engine lubricating systems. Comprising a main oil duct, an engine oil pan, an engine oil pump and an oil duct pipe set, the engine oil pan is used for storing engine oil, the engine oil pump is used for pumping the engine oil in the engine oil pan, and the oil duct pipe set communicates with the engine oil pump and the main oil duct and comprises a first oil duct and a second oil duct which are arranged in parallel; the heater is opened to heat engine oil flowing through the first oil duct when the engine oil temperature is lower than a second preset temperature, and is closed when the engine oil temperature is higher than or equal to the second preset temperature; and the second oil duct comprises a second temperature control valve, and the second temperature control valve is opened when the temperature of the engine oil is larger than or equal to the second preset temperature, so that the engine oil further flows into the main oil duct through the second oil duct. When the engine of the hybrid electric vehicle is in cold start, the temperature of the engine oil can be rapidly increased through the heating piece, so that abnormal sound and abrasion of the engine when the temperature of the engine oil is too low can be well improved.

The invention relates to the technical field of cable production and manufacturing and automation control, in particular to an energy-saving cable extrusion production process control system, which comprises a data acquisition module for acquiring real-time working condition parameters of an extrusion production line; the rheological thermal coupling analysis module is used for resolving the shear heat contribution rate under the current working condition; the heat engine response decoupling module is used for determining a heat engine response lag time difference between mechanical shear heat and machine barrel heat conduction; the energy efficiency optimization calculation module is configured to generate a dynamic heat balance control strategy aiming at an unsteady state working condition according to the heat engine response lag time difference and a preset unit output ratio energy consumption target; the self-adaptive execution module is configured to output a cooperative control instruction for a heating and cooling system and a screw driving system based on the dynamic heat balance control strategy so as to realize minimization of system energy consumption; according to the method, the common energy confrontation phenomenon of alternate operation of heating and cooling in traditional control is solved, and the energy consumption in the transition process is greatly reduced.

An aircraft propulsion system includes a hybrid-electric power plant for delivering power to an air mover for propelling an aircraft. The hybrid-electric power plant includes a heat engine operatively connected to a first air mover, and an electric motor operatively connected to a second air mover. The second air mover is positioned on a wing of the aircraft outboard from the heat engine. A method for reducing trailing vortices includes powering a first air mover of an aircraft with a heat engine during a take-off stage, a climb stage, a cruise-stage and / or a descent stage. The method includes powering a second air mover of the aircraft with an electrical motor during the take-off stage and / or the climb stage. The method includes freewheeling the second air mover during the cruise stage and / or the descent stage to generate mechanical energy and reduce wing tip vortices.

There is disclosed a method of controlling a helicopter (1) comprising: at least one thermal engine (11); at least one rotor (3), which is operatively connectable to thermal engine (11) to be drive, in use, at a set rotational speed (ωSET); an emergency system (40) comprising: at least one electric motor (41), which is operatively connectable to rotor (3) and an electrical power source (42), which is electrically connected to electric motor (41); the method comprises the steps of i) operatively connecting thermal engine (11) to rotor (3) and keeping electric motor (41) disconnected by rotor (3) or idle, in a normal operating condition of thermal engine (11); ii) detecting if thermal engine (11) is in at least partial failure condition; iii) accelerating electric motor (41) up to when said current rotational speed (ω) equals set value (ωSET), in case of at least partial failure of said thermal engine (11); step iii) comprises the steps of iv) sensing a plurality of parameters (ω, ωERR, ϕ, ϕERR, IIT, ττ / S, τMGB, Powerτ / S, PowerMGB) of thermal engine (11) and rotor (3); and v) identifying an at least partial failure of thermal engine (11), on the basis of parameters (ω, ωERR, ϕ, ϕERR, IIT, τ, P.

The utility model discloses a Stirling heat engine teaching aid based on an auxiliary magnetic suspension system and a U-shaped liquid column, which comprises a support table, a glass U-shaped tube and a quartz tube, a high-frequency induction heater is arranged on the upper side of the support table, a heating induction coil of the high-frequency induction heater is sleeved on the quartz tube, the quartz tube is horizontally arranged, and the glass U-shaped tube is arranged on the quartz tube. A first sealing plug and a second sealing plug are respectively plugged at the two ends of the quartz tube, heat preservation steel wool is arranged at one section, close to the first sealing plug, of the interior of the quartz tube, and a heating iron ring is arranged in the center of the interior of the quartz tube and is positioned in a heating induction coil of the high-frequency induction heater. According to the utility model, through the design of the auxiliary magnetic suspension system and the U-shaped liquid column, the friction between the piston and the pipe wall is greatly reduced, the energy loss in the mechanical energy conversion process is effectively reduced, and the working principle of the Stirling heat engine and the application of the second law of thermodynamics can be intuitively displayed.

The present invention relates to a method for determining whether or not there is a fuel leak in a pressurized fuel system (1) of a vehicle equipped with a heat engine (2), comprising the step of measuring the pressure value in the system (1) at predetermined different points in time within a certain period of time after the vehicle's heat engine (2) has been stopped. This method, - A step of determining the two time points in time where the pressure values ​​are furthest apart from each other, - A step in which, if the absolute value of the difference between these two pressure values ​​is less than or equal to a predetermined pressure difference threshold, the conclusion is drawn that there is a fuel leak in system (1), - A step (230) to determine whether there are two time points in each period where the temperature difference exceeds a predetermined temperature difference threshold, and where the pressure values ​​at these two time points are below a predetermined pressure threshold and exceed the opposite value of this pressure threshold, - If it is determined that these two points in time exist, step (240) to conclude that there is a fuel leak in system (1) and This includes methods.

The application provides a device for testing a rotating part in a high-temperature environment, comprising: a test section for providing a simulated high-temperature environment for the rotating part, and provided with a first through hole and a second through hole; a first tension assembly for pulling an end of the rotating part extending out of the first through hole; a second tension assembly for pulling an end of the rotating part extending out of the second through hole; a first sleeve connected outside the first through hole and sleeved outside the first tension assembly, and provided with at least one first air inlet channel; a second sleeve connected outside the second through hole and sleeved outside the second tension assembly, and provided with at least one second air inlet channel; and an air pressure source connected to the at least one first air inlet channel and / or the at least one second air inlet channel and providing an air pressure greater than or equal to the environmental pressure in the test section. The application can accurately simulate the thermal-mechanical coupling loading environment in which the rotating part is in actual work, and effectively improve the reliability and accuracy of the test results.

A method for controlling a thermal and electrical power plant for setting in motion at least one rotary member of a rotorcraft, the power plant comprising at least one heat engine and an electrical system provided with at least one electric machine. The method comprises: selecting, with a selector, an operating mode chosen from several operating modes; determining a density altitude and comparing, with a controller, the current density altitude and a threshold density altitude; and controlling, with the controller, the at least one electric machine depending on at least the chosen operating mode as well as the comparison and a necessary power to be supplied to the power transmission system.

A heat engine in which heat is transferred from the fluid between the output of the generating turbine and the input of the condenser to the fluid between the output of the condenser and the input of

An electric propulsion system for an aircraft, comprising: - an electrical power source (1) including a synchronous generator (11) driven by a heat engine (12), - a first synchronous electric motor (3) connected to an output of the synchronous generator by an alternating current electrical circuit (2), - a rotating propulsion unit (7), characterized in that it comprises: - a direct current electrical circuit (4) comprising, from an input connected to the alternating current electrical circuit: a first alternating / direct current converter (41), a direct current electrical link (42) and a second direct / alternating converter (43), - a second electric motor (5) connected to an output of the direct / alternating converter, - a differential gear train (6) including a first input shaft (61) connected to the first synchronous electric motor,a second input shaft (62) connected to the second electric motor and an output shaft (63) connected to the rotating propulsion unit. Figure for the abbreviation: Figure 1,

The present invention relates to a tool for precision machining, for example for grinding valve seats of a heat engine. The tool according to the invention comprises a housing 2, a sleeve 3 provided with a spherical orientation nut 3a, mounted inside the housing, a one-piece machining shaft 6, mounted freely in rotation and translation within the sleeve, and a means for adjusting the height of the shaft 6, comprising a means for rotationally locking said shaft to a sleeve 17 movable in translation relative to the sleeve.

The application discloses a starting device for a marine methanol engine, which comprises a compressed air control unit, a compressed air starting unit, a supplementary combustion unit, a rotating speed signal sensor and a plurality of Hall sensors. The compressed air control unit comprises a pressure reducing valve, a first one-way valve and a first electromagnetic reversing valve. The compressed air starting unit comprises a first electromagnetic on-off valve, a second electromagnetic reversing valve, a first pneumatic reversing valve, a second one-way valve, a second pneumatic reversing valve and a silencer. The supplementary combustion unit comprises a second electromagnetic on-off valve, a common rail pipe, a supplementary combustion gas injection valve, a third one-way valve and a third electromagnetic on-off valve. The starting device can quickly realize the cold state starting and the hot state starting of the marine methanol engine by using a small number of valve combinations, has high automation degree and good integration degree, and conveniently and efficiently solves the difficult starting problem of the marine methanol fuel engine.

There is provided a heat engine 10 comprising a combustor 120 and a controller 290. The combustor 120 includes a fuel injection port 128 and a pilot 130. The controller 290 is configured to mitigate thermoacoustic instabilities in a gas flow A, B within the heat engine 10 by selectively energising 320 the pilot 130 to ignite fuel discharged from the fuel injection port 128. There is also provided a method 300 of mitigating thermoacoustic instabilities in a gas flow A, B within a heat engine 10 comprising a combustor 120 including a fuel injection port 128 and a pilot 130. The method 300 comprises selectively energising 320 the pilot 130 to ignite fuel discharged by the fuel injection port 128.

The invention discloses a multi-fuel generator set control system, a control method thereof and a generator set, which are applied to the technical field of generator sets, the multi-fuel generator set control system comprises a multi-fuel generator set and a control system, the control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a fuel gas supply electric control valve, a signal detection module, an ignition device and a control device; a gas fuel supply pipeline of the multi-fuel engine is connected with a gas inlet of the gas supply electric control valve, and a gas outlet of the gas supply electric control valve is connected with a gas fuel inlet of the carburetor. And the signal input end of the fuel type detection circuit is connected with the fuel change-over switch. The temperature sensor is used for detecting a cylinder body temperature signal of the fuel engine and compensating the injection amount of the gas fuel according to the cylinder body temperature signal of the engine. The temperature sensor is used for monitoring the temperature of the cylinder body of the engine in real time, the injection amount of the gas fuel is compensated according to the temperature of the cylinder body of the engine, and the combustion condition in the engine heating process of the engine is stabilized.

The reciprocating piston type heat engine comprises a cylinder body, a piston, a connecting rod, a crankshaft, a lever and a compensation shaft, the piston is arranged in an inner cavity of the cylinder body, one end of the connecting rod is hinged to the piston, the crankshaft is hinged to the connecting rod, the other end of the connecting rod is hinged to the lever, and the other end of the lever penetrates through a sliding way transversely arranged on the compensation shaft. The lever can slide back and forth in the slideway of the compensation shaft. The piston thrust can be converted into output torque as much as possible, the output torque is effectively increased, and the combustion efficiency of the reciprocating piston type heat engine is improved.

The invention discloses a near-service multi-parameter fatigue test system for a supercritical carbon dioxide container, and relates to the technical field of fatigue tests of pressure-bearing containers. The invention aims to solve the problems that most of fatigue test systems of pressure-bearing containers in the prior art can only simulate single mechanical load or thermal load, the thermal-mechanical cyclic load coupling effect is difficult to effectively simulate, and the coupling fatigue damage of the pressure-bearing containers under the thermal-mechanical cyclic load effect cannot be effectively detected. The system comprises a supercritical carbon dioxide circulating system, a temperature control system and a detection automatic control system, the ultra-transcritical carbon dioxide circulating system generates periodic pressure change and periodic temperature fluctuation by circularly inflating and deflating a pressure-bearing container test piece; the temperature control system controls and adjusts the temperature of the fatigue experiment system; a controller of the detection automatic control system is connected with a data collector, and the system is controlled to operate through collected parameters, so that pressure and temperature control and safety protection are achieved. The device is used for the fatigue test of the pressure-bearing container.

A hybrid power module for ship propulsion relates to the field of marine power technology. To address the problems of existing ship propulsion modules, which often employ electric motors, traditional heat engines, and parallel gearboxes for propulsion, resulting in large, complex systems with low space utilization and poor operational stability, this invention utilizes a highly integrated parallel reduction gearbox, a flexible coupling, and an electric motor. This achieves high power density and reduces the size by half compared to existing ship propulsion modules, improving hull space utilization. Furthermore, it can directly drive the propeller shaft without external power. With increased power, a diesel engine or gas turbine can be introduced to drive the propeller shaft in parallel with this module. The forward and reverse rotation of the propeller shaft can be achieved by engaging or disengaging forward and reverse clutches. This module enables operation and switching of six different main engine modes, providing high redundancy in the power system and ensuring operational stability. It has a wide range of applications. This invention is applicable to ships.

The application belongs to the technical field of ceramic materials, and discloses a method for improving the performance of a ceramic connecting piece by surface crystallization of a connecting interface and application thereof. The method comprises the following steps: spraying SiO2-TiO2 powder and MgO-Al2O3-SiO2 glass powder on the surfaces of two SiC ceramic blocks in sequence, respectively; connecting the two pretreated SiC ceramics to form a pre-connected ceramic block; and placing the pre-connected ceramic block in an induction heating furnace and heating to 1500-1600 DEG C to obtain a SiC ceramic connecting piece. The application can effectively promote the crystallization of glass in the connecting layer by covering TiO2 on the surface of the SiC ceramic, significantly improves the performance of the SiC joint, and the prepared joint can be widely applied in the fields of heat engines and nuclear energy.

The invention relates to an assembly comprising a heat engine equipped with a cylinder head (2) covered by a cylinder-head cover (4), which between them receive at least one camshaft having, on one side, a joining edge parallel to its axis, which is formed between two flat surfaces, and comprising a tool for adjusting the rotation of the camshaft, which tool fits into a bore in the cylinder-head cover, the adjustment tool comprising an attachment part (20) for attachment to the cylinder-head cover (4), and an independent rod comprising, at its end, a notch having two bearing faces which, in the fixed position of the tool, bear on the two surfaces of the camshaft on either side of the edge.

This invention discloses an intelligent calculation method for the thermal compression ratio of a diesel engine based on machine learning, comprising the following steps: S1, acquiring diesel engine thermal operation data and generating a state data sequence; S2, performing continuous-time state encoding on the state data sequence to construct a state representation sequence; S3, performing feature contribution analysis on the state representation sequence to generate a correlated feature sequence; S4, performing state correlation propagation and compression ratio optimization calculation on the correlated feature sequence to obtain a predicted compression ratio sequence; S5, constructing a theoretical pressure curve and an in-cylinder pressure curve based on the predicted compression ratio sequence, and calculating the curve deviation sequence; S6, performing feedback updates based on the curve deviation sequence and outputting the calculation results. This invention, combined with dual-state flow liquid neural networks, possesses advantages such as strong adaptability to thermal engine states, high accuracy in compression ratio calculation, high stability in complex operating condition analysis, and strong continuous dynamic optimization capability.

The utility model relates to a vehicle low-temperature energy storage management system which is in communication connection with an external temperature sensor of a vehicle and comprises a heating device, an electronic water pump, a first flow control valve, an electric control three-way valve, an engine air inlet air filter and an engine. The electronic water pump is connected with the first flow control valve, the first flow control valve is connected with an inlet of the electric control three-way valve and connected with an air inlet of the engine air inlet air filter through a first outlet of the electric control three-way valve, and an air outlet of the engine air inlet air filter is connected with a water jacket water inlet of an engine to form an air inlet system heating loop. A second outlet of the electric control three-way valve is connected with a water jacket water inlet of the engine, a water jacket water outlet of the engine is connected with a first water inlet of the heating device to form an engine heat engine heating loop, heat is provided for the engine and an engine air inlet air filter, the engine and the engine air inlet air filter are heated, and then a vehicle is started rapidly and timely.

A cryogenic carbon capture system includes a flue gas cooling device in fluid communication with a heat engine. The flue gas cooling device receives a fluid stream that is downstream from the heat engine and a cooled liquid coolant stream so that the fluid stream is cooled by the cooled liquid coolant stream and a cooled flue gas stream is formed. A cryogenic carbon capture unit receives at least a portion of the cooled flue gas stream and separates carbon dioxide from the first portion of the cooled flue gas stream so that a clean flue gas stream and a carbon dioxide stream are formed. A liquid coolant cooling device receives the clean flue gas stream and a liquid coolant stream and cools the liquid coolant stream using the clean flue gas stream so that the cooled liquid coolant stream is formed and provided to the flue gas cooling device. The heat engine is in fluid communication with the cryogenic carbon capture system and receives a portion of a split stream that is downstream from the flue gas cooling device as an exhaust gas recirculation stream and an air stream.

The utility model belongs to the technical field of cold and hot water units, and discloses a four-way valve cold and hot machine which comprises an outer box body, an upper cover is fixedly installed at the upper end of the outer box body through bolts, a main machine and an evaporator are fixedly installed in the outer box body, and a liquid inlet pipe and a liquid outlet pipe are installed on the side surface of the main machine. A mounting plate is fixedly arranged on the surface of the outer side of the main machine, a non-return mechanism is arranged on the upper surface of the mounting plate, and by preventing hot air from flowing back and communicating, heat loss is reduced, so that energy efficiency is improved, and efficiency is improved. According to the four-way valve cooling and heating machine, a linkage structure of the switching disc, the flow guide groove and the one-way valves is integrated in the non-return mechanism, accurate non-return and energy efficiency improvement are achieved through switching of the one-way valves with different damping characteristics, and dual protection of mechanical damping non-return and electric control path cut-off is formed in cooperation with on-off control over a liquid outlet path through an electromagnetic valve; and hot air is thoroughly prevented from flowing back and communicating through a gap between the four-way valve and the non-return box.

The application provides a Stirling heat engine and heat pump system, and the Stirling heat engine at least comprises: a shell provided with a containing cavity; a first heat exchanger arranged in a first end of the containing cavity; a second heat exchanger arranged in a second end of the containing cavity; a regenerator arranged in the containing cavity and located between the first heat exchanger and the second heat exchanger; a first piston arranged in the first end and located on a side of the first heat exchanger away from the regenerator, the first piston is sealingly arranged with an inner side wall of the first end, and a first compression cavity is formed between the first piston and the first heat exchanger; wherein the first piston is provided with a first buffer cavity, and a ventilation mechanism is arranged on a side of the first piston facing the first heat exchanger and communicated with the first buffer cavity and the first compression cavity respectively, and the ventilation mechanism and the first buffer cavity are used for adjusting the air pressure in the first compression cavity. In this way, the heat pumping efficiency and energy efficiency of the Stirling heat engine can be improved.

The invention belongs to the technical field of ceramic materials, and discloses a method for improving the performance of a ceramic connecting piece through surface crystallization of a connecting interface and application of the method. The method comprises the following steps: respectively and sequentially spraying SiO2-TiO2 powder and MgO-Al2O3-SiO2 glass powder on the surfaces of two SiC ceramic blocks, connecting the two pretreated SiC ceramics to form a pre-connected ceramic block, and heating the pre-connected ceramic block in an induction heating furnace to 1500-1600 DEG C to obtain the SiC ceramic connecting piece. According to the method, crystallization of glass in a connecting layer can be effectively promoted by covering the surface of SiC ceramic with TiO2, the performance of the SiC connector is remarkably improved, and the prepared connector can be widely applied to the fields of heat engines, nuclear energy and the like.

The invention relates to a method for determining the angular position of an irregularly toothed camshaft target. A sensor generates a signal at each tooth passage, creating significant cutting edges. A processing unit processes this signal to determine the time intervals between these edges, stores theoretical ratios, tolerance intervals, and confidence intervals. Suspicion counters are associated with each edge. By calculating actual ratios based on the measured intervals, the unit discriminates between candidate edges: edges not within tolerances are eliminated, those within confidence intervals reset the suspicion counter, and those outside confidence intervals increase the suspicion counter until they are eliminated. These steps are repeated until a single candidate edge is identified. The angular position of the target is then determined from this single edge.Figure for the abbreviation: Figure 2.