925 results about "Heat engine" patented technology

The invention provides an engine internal damage identification method and system based on target detection, and the method comprises the steps: obtaining the distribution of thermal stress and mechanical stress under different working conditions through finite element analysis for typical working conditions of high temperature, high pressure and heat engine coupling load according to the structural characteristics and fault modes of an engine cylinder; processing an ultrasonic guided wave signal through a synthetic aperture focusing algorithm, reconstructing a three-dimensional shape of a crack by combining a three-dimensional geometric model of the cylinder body and guided wave propagation characteristics, and determining a crack propagation rate so as to analyze crack propagation of the cylinder body; the residual service life of the cylinder body under the given working condition is predicted according to the crack size, the crack growth rate and the high-risk working condition parameters in combination with the material mechanical property parameters of the fracture toughness; and according to the crack instability critical length, the cylinder body crack propagation analysis result and the high-risk working condition judgment result, the engine operation working condition is optimized, the occurrence frequency of the high-risk working condition is reduced, the service life of the cylinder body is prolonged, and the crack detection and recognition precision is improved.

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 power plant can have a structure; an output shaft connectable to a load, the output shaft rotatable about an axis relative the structure; a thermal engine secured to the structure, the thermal engine having a thermal engine shaft; an electric motor having a stator and a rotor shaft, the stator secured to the structure; an epicyclic gearing having a sun gear coaxial to a ring gear, a plurality of planet gears meshed between the sun gear and the ring gear, and a carrier coaxial to the sun gear and to the ring gear, the sun gear, carrier, and ring gear being rotatable relative the casing structure, the output shaft and the rotor shaft both coupled to the carrier, and the thermal engine shaft coupled to sun gear and the carrier; and an overrunning clutch operable to prevent the rotation of the ring gear in one angular direction.

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 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 discloses a combustion chamber wall surface pit array structure design method and a combustion chamber. The method comprises the following steps: extracting a three-dimensional fluid model and carrying out bench test; establishing and verifying an in-cylinder combustion and emission simulation model; performing temperature field bench test on the cylinder cover, the piston and the cylinder sleeve; establishing and verifying a heat transfer simulation model; establishing a heat engine coupling simulation model; parameterization design is conducted on the pit array structures on the piston, the cylinder sleeve and the cylinder cover, a collaborative optimization mathematical model of pit array structure design is established, an optimal solution set is obtained, and typical solutions are selected; key parts in the typical solution are machined, an installation test is carried out, and the optimal pit array structure design scheme is obtained through the test. According to the pit array structure obtained through the collaborative optimization design method, the weight of components can be reduced, a turbulent layer can be formed on the near wall face of the combustion chamber to promote oil-gas mixing, then nitric oxide and particulate matter are reduced, and the combustion performance of an engine is improved.

The invention discloses a clutch thermal load evaluation method and system considering a spline friction pair. The evaluation method comprises the steps that the axial contact pressure attenuation coefficient of a friction element is obtained; calculating the average surface pressure of each friction pair of the clutch based on the axial contact pressure attenuation coefficient; based on the average surface pressure, friction torques and temperature fields of all friction pairs of the clutch are obtained; calculating the single spline tooth torque and the in-plane bending moment of each friction pair based on the friction torque and the temperature field of each friction pair; calculating a critical value of heat engine coupling failure based on the size characteristics of the dual steel disc; and evaluating the thermal load of the clutch based on the single spline tooth torque and the in-plane bending moment of each friction pair and the critical value of the heat engine coupling failure. According to the method, the real-time torques and temperatures of the friction elements at different positions can be solved, the friction torques and radial temperature fields of the dual steel discs at different moments and different positions are obtained, and failure evaluation is carried out.

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.

A method and system for controlling an intelligent switch cabinet are provided. The method includes: obtaining running states of a heat engine unit, and performing a matching analysis with a safety measure content of a corresponding heat engine and a DCS marking state, determining first heat engine devices and second heat engine devices; determining a first allowable operation item and a second allowable operation item, determining required operation items in combination with a current actual situation; setting a first work task to an electrical five-prevention system and setting a second work task to an electrical work ticket system, and setting an operation authority to the elements to be operated of the intelligent switch cabinet after the setting is completed; performing the power-off operation on the first heat engine devices of being associated and performing the power-on operation on the second heat engine devices of being associated.

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 present invention relates to saddle-ride type vehicle, motorcycle or motorbike, comprising a frame (2), at least a steering wheel (3) rotatably connected to the frame and a single driving wheel (4). The vehicle further comprises a motor assembly (10) and a transmission unit (T) that mechanically connects the motor assembly (10) to the driving wheel. The motor assembly comprises a thermal engine (MT) including a crankshaft (11), an electric machine (E) including a stator (S) and a rotor (R), and a clutch (C) including a driving shaft (C1) and a driven shaft (C2). The motor assembly (10) further comprises a gearbox (G) provided with an input shaft (111) and an output shaft (112). According to the present invention the crankshaft (11) of the thermal engine (MT), the rotor (R) of the electric machine (E) and the two shafts (C1, C2) of the clutch are coaxial so as to rotate around a common rotation axis (101) which is parallel to a longitudinal direction (Y) of the vehicle and parallel to the rotation axis of the output shaft (112) of said gearbox (G).

A method for regulating the speed of a propulsion device of an aircraft including: the propulsion device and a gearbox MGB; the heat engine and at least one electric motor, mounted in parallel on the MGB, the heat engine having a fuel circuit; main and backup regulation systems, and a regulation system, each capable of regulating the speed of the heat engine or the electric motor, respectively; a control system of the aircraft, capable of sending a speed or power setpoint to each of the regulation of the heat engine and the electric motor. The method includes: sending a speed setpoint NM2ref to the regulation system of the electric motor, the regulation system sending a power command PM2*, to obtain an instantaneous power PM2m; simultaneously, sending a speed or power command to the backup regulation system of the heat engine, the backup regulation system sending a selected fuel flow command QCarbAux* to the fuel circuit of the heat engine.

An energy harnessing system comprising a solar collector, a solar-energy heat circulation system, a heat engine, and a refrigerant circulation system. The solar-energy heat circulation system includes a first heat exchanger 11 associated with the solar collector and communicated with at least two second heat exchangers 18a, 18b, 18c, 18d. The heat engine has at least two carbon-dioxide-sublimation-and-deposition chambers 17a, 17b, 17c, 17d, a turbine 30, and an expansion chamber 32. Each carbon-dioxide-sublimation-and-deposition chamber 17a, 17b, 17c, 17d contains one of the second heat exchangers 18a, 18b, 18c, 18d. The refrigerant circulation system is configured to cool the expansion chamber 32 and each sublimation-and-deposition chamber 17a, 17b, 17c, 17d.

The system for storing and using thermal energy has a first closed-loop cycle arrangement which comprises two main storage tanks: a first tank to store heat-storage fluid at low temperature and a second tank to store 5 heat-storage fluid at high temperature. The system comprises also a second thermodynamic cycle arrangement and a third thermodynamic cycle arrangement which can work respectively as a heat pump, to heat in a first heat exchanger the heat-storage fluid at low temperature by consuming electrical energy and store it in the second tank, and as a heat engine, to produce 0 electrical energy by cooling in a second heat exchanger the heat-storage fluid at high temperature and store it in the first tank.

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 present disclosure relates to a propulsion assembly (4) for an aircraft (1) and to a method for the thermal management of such a propulsion assembly (4). The propulsion assembly (4) comprises a first engine (5a) with a heat exchanger (16a) through which an air duct (15a) passes, a second engine (5b), which is a heat engine, and an air interconnection duct (21) connecting the air duct (15a), downstream of the heat exchanger (16a) of the first engine (5a), to the second engine (5b). The thermal management method comprises the steps of heating, in the heat exchanger (16a) of the first engine (5a), an air flow circulating in the air duct (15a) passing through the heat exchanger (16a) of the first engine (5a), and diverting the heated air flow downstream of the heat exchanger (16a) of the first engine (5a), through the air interconnection duct (21), to the second engine (5b).

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.