611 results about "Heat engine" patented technology

The invention relates to the technical field of bearing detection, and particularly discloses a deep groove ball bearing clearance assembly error detection method and system.The method comprises the steps that dynamic parameters of a deep groove ball bearing in each assembly stage in the assembly process under preset assembly parameters are obtained, and the dynamic parameters comprise vibration spectrum data, temperature distribution data and shaft diameter displacement; obtaining a dynamic clearance error value according to the plurality of continuous dynamic parameters; and obtaining stress gradient distribution data at a plurality of time nodes in each assembly stage according to the dynamic clearance error value. The deep groove ball bearing assembly quality evaluation and analysis method has remarkable beneficial effects in the aspects of deep groove ball bearing assembly quality evaluation and analysis. Through a series of closely associated steps, the actual state of the bearing is comprehensively and accurately reflected by comprehensively considering multiple parameters to accurately calculate local stress and judge the stress area from accurate judgment of a thermal-mechanical coupling stress area, obtaining of an external dynamic deformation comprehensive index and calculation of a total assembly error value and a clearance comprehensive evaluation index.

The invention discloses a multi-axis high-low-cycle composite heat engine fatigue test device and a test method, and relates to the technical field of fatigue test.A clamping swing mechanism and a high-cycle loading mechanism in the device are located on two planes perpendicular to each other, a low-cycle load acts on a test piece through a fatigue testing machine, and a high-cycle load acts on the test piece; the high-cycle load acts on the clamping swing mechanism through the high-cycle loading mechanism, so that high-cycle loading and low-cycle loading of different paths are achieved, and multi-axis loading of the vibration load is achieved due to the asymmetry of the clamping swing mechanism. According to the fatigue test device and test method for the multi-axis high-low-cycle composite heat engine, the real load environment of a blade material is considered, engineering practice is fitted, and a basis is provided for life evaluation.

The invention provides a rotary table bearing-torque motor thermal vibration coupling modeling method, and relates to the technical field of machine tool reliability analysis. Comprising the steps of calculating bearing restoring force, torque and elastic rigidity; giving a dynamic balance equation of the main shaft system; unbalanced magnetic pulling force and unbalanced mass excitation are calculated; a displacement field is solved, and load changes caused by the displacement field are transmitted to the thermal model; the contact force borne by the bearing is updated by considering the load effect related to displacement, and the friction heat generation of the bearing and the heat generation of each part of the motor are calculated; calculating thermal deformation and thermal displacement of the bearing; thermal resistance among nodes is calculated, and a temperature field equilibrium equation is given through a thermal resistance network to achieve rapid thermal-mechanical coupling analysis; the thermal equilibrium equation is solved to calculate temperature response; importing the latest temperature into the kinetic model; lubricating grease viscosity and bearing thermal deformation are updated; and repeating the steps to finally obtain the main shaft displacement field and temperature field response. The method is high in accuracy, high in universality, low in test cost and high in test efficiency.

A hybrid powerplant is provided for an aircraft. This hybrid powerplant includes a housing, an electric machine, a machine fluid circuit, a heat engine and a geartrain. The housing includes a machine containment zone and an engine compartment outside of the machine containment zone. The electric machine is arranged within the machine containment zone. The machine fluid circuit services the electric machine. The machine fluid circuit extends in the machine containment zone and is arranged outside of the engine compartment. The heat engine is arranged within the engine compartment. The geartrain is operatively connected to the electric machine and the heat engine.

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.

A rotary heat engine 100 comprises a rotor 200 rotatable relative to a stator 300. The stator defines a radially inner surface 304 which faces a radially outer surface of the rotor. The rotor radially outer surface defines at least one rotor combustion chamber 210, and the stator radially inner surface defines at least one stator combustion chamber 310. The number of rotor combustion chambers is not equal to the number of stator combustion chambers. The or each rotor combustion chamber may extend radially inwardly at a leading edge 212 to define a rotor step 216 and reduce in depth towards a trailing edge 214. A rotor surface base wall 218 may face the stator and extend from the leading to the trailing edge of the rotor combustion chamber to define a rotor combustion chamber convex surface 220 extending at least part of the way from the leading to the trailing edge of the rotor combustion chamber.

The invention discloses an engine oil temperature estimation method and device, electronic equipment and a storage medium, and is applied to the field of automobiles. According to the engine oil temperature estimation method and device, the current running state of an engine is obtained firstly, the running state comprises the shutdown state, the engine warming state and the engine heating state, then the method for estimating the engine oil temperature is determined based on the running state, the method for estimating the engine oil temperature comprises target factors, and the target factors are determined according to the running state. And finally, estimating the engine oil temperature by using the method. The invention further discloses a device for estimating the engine oil temperature. The accuracy of estimating the engine oil temperature of the engine is improved.

A method for controlling a hybrid power plant of a vehicle provided with a heat engine and at least one electrical unit comprising an electric machine, an electrical energy source, and a power management unit, the heat engine and the at least one electric machine being mechanically connected to input shafts of a gearbox. After acquiring parameters of the at least one electrical unit, and receiving a mechanical power requirement of the vehicle, a usable electrical power that can be used by the electrical unit and at least one operating setpoint of the electrical unit are determined as a function of the parameters and the mechanical power requirement. Finally, the heat engine and the electrical unit are controlled as a function of the at least one operating setpoint in order to meet the mechanical power requirement.

The invention discloses a geological battery energy storage system and an operation method. The system comprises a medium and low temperature heat storage module, a high temperature heat storage module and a heat engine circulation module. In the heat storage process, low-grade waste heat can be pumped to the medium temperature to be stored in the medium-low temperature heat storage well, or a solar heat collector, an air source heat pump and the like are used for conveying medium-low temperature heat sources to be stored in the medium-temperature heat storage well. In the charging process, a heat source of the medium-low temperature heat storage module is upgraded and stored in a high-temperature heat storage well by using electric power to drive heat pump circulation; in the discharging process, heat engine circulation is adopted to convert stored high-grade heat energy into electric energy. According to the invention, multiple types of underground spaces can be fully utilized to promote new energy consumption, the stability of a power grid is improved, and meanwhile, concealment and safety are achieved.

The invention relates to the technical field of industrial robot control, in particular to a feed-forward control industrial robot dynamic friction force model and a measuring method. The method comprises a joint friction force model, and the joint friction force model is divided into a low-speed section speed-friction torque cubic polynomial fitting model and a high-speed section speed-friction torque cubic polynomial fitting model; the method comprises the following steps: robot joint speed interval division and maximum speed percentage calculation; robot joint friction torque measurement in a heat engine state; fitting a speed-friction torque curve by adopting a low-speed and high-speed segmented cubic polynomial; and determining the optimal time shift of the theoretical curve and the actual curve after the friction torque is added into the kinetic model. According to the method, all data of the whole constant-speed section are utilized, so that the friction torque result at the corresponding speed is more accurate, and finally, the model well describes the friction torque performance of the robot in the low-speed section and the high-speed section.

The application discloses a brake interface wear and fatigue crack prediction method based on complete thermal-mechanical coupling, comprising the following steps: S1, establishing a finite element model, and discretizing total analysis time into multiple time periods; S2, starting finite element analysis, and calculating interface node contact pressure and node slip rate; S3, performing transient thermal-mechanical coupling analysis; S4, calculating node wear depth and wear direction, and updating grid information by using ALE technology; S5, judging whether the interface contact state is stable convergence; S6, ending analysis, unloading brake load, and obtaining brake disc residual stress; and S7, presetting a crack at the maximum residual stress, simulating crack propagation behavior, calculating stress intensity factor and brake disc fatigue life. The application can simulate tribological behaviors such as contact stress, temperature and wear, and realizes brake disc fatigue life prediction by taking residual stress after the thermal-mechanical coupling process as load input.

A hybrid electric engine control module (ECU) configured to be operatively connected to a hybrid electric aircraft powerplant having a heat engine system and an electric motor system to control a torque output from each of the heat engine system and the electric motor system. The ECU can be configured to receive a torque command and split output power between the electric motor system and the heat engine system. Additionally and / or alternatively, the ECU can be configured to balance a total torque against a second total torque of a second aircraft powerplant.

An internally heated engine, which comprises a Stirling engine and heating facilities (6, 7); the present engine, by means of altering a means of external heating of the Stirling engine, is provided with said heating facilities (6, 7) in a hot cylinder to push a piston to output power.

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 invention discloses a tail gas centralized treatment device and method in coconut shell activated carbon production, and relates to the technical field of tail gas treatment.The tail gas centralized treatment device in coconut shell activated carbon production comprises a base, a carbonizing machine is fixedly installed at the top of the base, and a heat exchange machine is fixedly installed at the top of the base; the tail gas centralized treatment device comprises a base, a heat exchanger is fixedly mounted at the top of the base, a gas conveying pipe fixedly penetrates through the bottom of the heat exchanger, a treatment barrel is fixedly mounted at the top of the base, and a cyclone separator is fixedly mounted at the top of the treatment barrel. At the moment, the cyclone separator is started and separates out large-particle impurities in the tail gas, so that equipment is prevented from being blocked and abraded, the service life is prolonged, the load on equipment parts can be reduced, the overall purification efficiency is improved, subsequent treatment is facilitated, and the situation that the large-particle impurities wrap reactants to affect the solid-liquid separation efficiency is avoided.

The invention relates to a variable-power scale-free boiler and topology heat transfer quasi-super Stirling ecological heat engine technology, in particular to a working principle of direct-current scale-free super heat exchange high power density reaching 8-16 times fuel oil stress application variable power in the ZL2012105664497.4 patent achievement innovation field of the inventor, and the working principle is applied to normal low pressure, middle high pressure, critical pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure and high pressure. Various types of boilers are free of scale obstruction, super in heat exchange, high in power density, ultra-low in cost rate, and safe in multi-module unit combination of less than 30-90L; a boiler heat exchange heat output'boiler 'system formed by connecting ten to hundreds of congruent module (tube panel) units in parallel is integrally matched with a magnesium catalysis water-based combustion-supporting combustion science'boiler' system of a '8-16 times fuel oil stress application 'Stirling'heat engine', and meanwhile, a new era of human cosmic rock planet carbon dioxide and carbon rock particle energy ecological metallurgy is created. The invention relates to a Stirling ecological heat engine, in particular to a variable-power scale-free multi-module once-through boiler and a topology heat transfer Stirling ecological heat engine, wherein the variable-power scale-free multi-module once-through boiler and the topology heat transfer Stirling ecological heat engine are used for gathering metamorphosis heat radiation and a three-guide interlining heat transfer and exchange body heat output system under the constraint of extreme-effect

The invention provides a double-rotor direct-drive coaxial reverse-propeller electric ducted fan, which is characterized in that a single motor with an inner rotor and an outer rotor directly drives two pairs of blades, an intermediate transmission device and an inner rotor excitation group to generate a rotating magnetic field, and a first-stage propulsion component and a second-stage propulsion component with the same rotational inertia are driven under the action of electromagnetic torque with the same acting force and counter-acting force; one-way rotation deflection torque is balanced, and coaxial reverse propeller movement is achieved; the rectification duct reduces the induced resistance of the blades and improves the propulsive efficiency, the convergence and expansion guide sleeve and the motor frame body dissipate heat to form circulating heat dissipation of the Brayton heat engine, meanwhile, air is heated, expanded and ejected out to generate thrust, the efficiency is high, and the thrust is large. The dual-rotor motor direct-driven coaxial reverse propeller ducted fan propulsion unit is simple in mechanism, light in structure, large in power-to-weight ratio, high in reliability, beneficial to use in a narrow space and vertical take-off and landing, especially suitable for an EVTOL (electric vertical take-off and landing aircraft), and capable of promoting popularization of small aircrafts and vertical take-off and landing urban transportation carriers.

A method for converting heat to mechanical work includes providing incoming heat transfer liquid (HTL) at a first temperature to a plurality of mixing chambers, providing incoming compressed gas at a second temperature to the plurality of mixing chamber, enabling the gas and the HTL to mix, producing a gas-and-HTL mix, enabling the HTL in the gas-and-HTL mix to heat the gas and isothermal expansion of the gas in the gas-and-HTL mix, limiting volume of the gas-and-HTL mix, thereby increasing pressure of the gas and causing acceleration of a flow of the gas-and-HTL mix, causing the gas-and-HTL mix to eject through a plurality of nozzles, thereby converting the heat of the HTL to kinetic energy to cause movement of the plurality of nozzles; and using the kinetic energy to produce mechanical work.

The present invention discloses a high and low temperature cold and hot shock test device and method for hydrogen fuel cells, the device includes: a flushing channel for clamping a sample to be tested; a first refrigerator and a second refrigerator connected in series, a first control valve is provided between the two, used to control the timing and flow rate of the medium flowing from the second refrigerator into the first refrigerator, the first refrigerator, the second refrigerator and the flushing channel form a cold shock circuit; a first heating machine and a second heating machine connected in series, a second control valve is provided between the two, used to control the timing and flow rate of the medium flowing from the second heating machine into the first heating machine, the first heating machine, the second heating machine and the flushing channel form a thermal shock circuit. The present invention controls the input and output of the flushing medium by setting a multi-stage cooling / heating mechanism, separates the reflux medium from the flushing medium, and realizes the alternating stable flushing of the medium below ‑20°C and the medium above 80°C, without causing temperature instability due to the influence of the reflux medium.

The invention relates to a motor vehicle comprising a heat engine, an exhaust line, and a thermal protection system which comprises: - a means for evaluating the temperature of the exhaust line (M1); - a means for evaluating temperature criticality (M2) between a low level 1 without risk of degradation of the components of the exhaust line; an intermediate level 2; and a high level 3 with said risk; - a means for cooling (M3) the heat engine above level 2 so as not to degrade the performance of the heat engine; and - a limiting means (M4) limiting the heat engine above level 3, by limiting the torque of the heat engine in the event of overheating of the exhaust line. The invention also relates to a method and a program based on such a vehicle. Figure 1

The invention provides a clutch pressure plate thermal deformation simulation method, system and device and a medium, and belongs to the technical field of automobile clutches. A three-dimensional model of a dry diaphragm spring clutch is obtained, and a clutch heat engine coupling deformation finite element model is established; setting a constraint set point at a preset position; calculating the density of heat flow applied to the friction surface of the pressure plate; respectively calculating a pressure plate temperature field simulation result and a pressure plate thermal mechanical coupling deformation simulation result; outputting a calculation result as a simulation result file; and configuring the thermomechanical coupling deformation simulation result of the pressure plate to the temperature distribution cloud chart of the pressure plate, respectively extracting and analyzing the axial displacement of the inner side and the outer side of the friction surface of the pressure plate, and calculating to obtain the thermomechanical coupling deformation of the pressure plate. According to the method, multiple aspects such as heat flow density application, heat conduction, mechanical load application and heat engine coupling are comprehensively considered, the actual working condition of the clutch can be reflected, and the design and optimization requirements of the clutch are met.

The utility model discloses a vamp heat pressing machine which comprises a mounting base, a hot pressing frame is arranged on the rear side of the upper portion of the mounting base, a mounting frame is arranged on the mounting base, a containing plate is arranged in the mounting frame, limiting strips are arranged on the two sides of the containing plate, and limiting rails are arranged on the two sides of the interior of the mounting frame. A hot-pressing frame is arranged on the upper side of the placing plate, a pushing plate is arranged on the inner side of the hot-pressing frame, a hot-pressing plate is arranged at the bottom of the pushing plate, the hot-pressing plate is in butt joint with the placing plate, a protective frame is arranged in front of the hot-pressing frame, and a transparent plate is arranged on the inner side of the protective frame. The motor drives the threaded rod to rotate, so that the placing plate is moved into the hot-pressing frame, after hot-pressing is completed, the motor rotates reversely, so that the placing plate is driven to move out of the hot-pressing frame, namely, the hot-pressed vamps are recycled, workers do not need to manually place the vamps at the hot-pressing position, and the workers can be effectively prevented from being scalded.

A closed working fluid type heat engine (100) for power generation in the environment of a nuclear fusion power system (200). The heat engine includes a primary heat exchanger (102) connected to a primary heat source (106) and a secondary heat exchanger (108) connected to a secondary heat source (110). The secondary heat source is thermally independent of the primary heat source, and the temperature of the primary heat source is higher than that of the secondary heat source. The heat engine also includes a main turbine (104) and an auxiliary turbine (116). The turbines are arranged in fluid parallel, and a parallel shunt point is arranged between the primary heat exchanger and the secondary heat exchanger. The main turbine receives the working fluid heated by the secondary heat exchanger and the main heat exchanger, and the auxiliary turbine receives the working fluid heated by the secondary heat exchanger. The heat engine also includes a first regenerator (124) configured to thermally connect working fluid flowing out of the main turbine with working fluid flowing into the main heat exchanger. Suitable nuclear fusion power systems and methods of operation thereof are also described.

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 air cooling machine power enhancement potential quantitative estimation method, and belongs to the technical field of engine power estimation. The air cooling machine power strengthening potential quantitative estimation method comprises the steps that air cooling machine performance parameters, a heat engine state reverse dragging cylinder pressure curve and a heat release rate curve are obtained; a one-dimensional simulation model of the air cooler is established, and thermodynamic cycle gas state parameters of the air cooler are obtained; establishing a three-dimensional combustion simulation model, and calculating the thermodynamic state of gas in a combustion chamber in a compression stage after an intake valve is closed; establishing a three-dimensional structure simulation model of the air cooling machine cylinder part; the three-dimensional combustion simulation model is adopted for oil gas chamber optimization, heat-mechanical load verification is carried out on all parts, and the optimized heat release rate is obtained; and inputting the optimized heat release rate into a one-dimensional simulation model, and quantitatively calculating the power strengthening potential of the air cooling machine. According to the quantitative estimation method for the power strengthening potential of the air cooling machine, the power strengthening potential of the air cooling machine is quantitatively estimated through the digital simulation technology, and the strengthening design efficiency is improved.

The hybrid aircraft power plant can have an output shaft connectable to a load, the output shaft rotatable about an axis; a thermal engine having a thermal engine shaft coaxial with the output shaft; an electric motor having a rotor shaft coaxial with the output shaft; a first clutch operable to engage the thermal engine shaft with the output shaft; a second clutch operable to engage the rotor shaft with the output shaft; a third clutch operable to engage the thermal engine shaft with the rotor shaft; the first clutch, second clutch and third clutch disposed axially between the electric motor and the thermal engine, relative to the axis.

The invention discloses a starting method, device and equipment of a fuel cell engine and a storage medium. The starting method comprises the steps that when the fuel cell engine is in a cold engine starting state with the environment temperature larger than 0 DEG C, the fuel cell engine is controlled to execute a heat engine mode; when the pile cooling liquid outlet temperature reaches a first target temperature, obtaining an intercooler cooling liquid inlet temperature and an intercooler cooling liquid outlet temperature; and when the temperature of the intercooler cooling liquid inlet is lower than the temperature of the intercooler cooling liquid outlet, the fuel cell engine is controlled to enter a load pulling mode. According to the technical scheme, it is ensured that the temperature condition of the fuel cell engine rapidly reaches the target value before rapid load pulling, the fault that the fuel cell engine directly enters the load pulling mode and liquid water forms pile flooding due to current increase is avoided, rapid engine heating is achieved, and meanwhile normal work of the fuel cell engine is ensured.

The present invention provides a heat engine operating on a novel closed thermodynamic cycle. The primary characteristics of the heat engine comprise a boiler, condenser, liquid pump, and a regenerative expander in which heat is recovered from the expansion / work extraction process to be returned to the sensible heat addition process that occurs between the condenser outlet and the boiler inlet. The regenerative expander may be comprised of a novel turbine design described as part of the present invention. The primary characteristic of the turbine being a rotor consisting of a hub intersected by a plurality of narrow helical channels through which motive fluid is directed by a plurality of nozzles to induce rotation in the same direction as the helical path of the channels. The liquid pump of the heat engine may also be comprised of a novel design based on similar working principles to the above turbine.

The invention provides a turbojet engine starting control method and system based on artificial intelligence. The method comprises the steps that the oil way pressure of an ignition oil way of an engine, the environment temperature of the environment where the engine is located and the internal temperature of the engine are obtained; under the condition that the oil way pressure meets a preset condition and the environment temperature is smaller than or equal to a first temperature threshold value, an igniter is controlled to be started, a gunpowder starter is controlled to be started at a first time point, and the first time point is a time point which is delayed by a preset duration of the time point for controlling the igniter to be started; and under the condition that the oil way pressure meets the preset condition and the environment temperature is larger than a first temperature threshold value, or the oil way pressure meets the preset condition and the internal temperature is larger than a second temperature threshold value, the igniter and the gunpowder starter are controlled to be started at the same time. According to the self-adaptive control method, the starting reliability of the turbojet engine in the low-temperature environment is effectively enhanced, and meanwhile the requirement for quick starting in the normal-temperature or heat engine state is met.

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.