3155 results about "Supercharger" patented technology

The invention discloses an optimization control method for a target EGR rate, which comprises the following steps: entering EGR closed-loop enabling under the condition of meeting the closed-loop enabling of an EGR system, determining a filtering time coefficient of the target EGR rate according to the response time of a supercharger and the time of exhaust gas flowing from an EGR valve to an EGR exhaust gas convergence point, and calculating the change rate of the filtering time coefficient of the target EGR rate; obtaining filtering time according to a filtering time learning coefficient and the change rate of the filtering time coefficient of the target EGR rate; according to the filtering time and the target EGR rate, the filtered target EGR rate is obtained; and an EGR valve is controlled according to the filtered target EGR rate. According to the method provided by the invention, the target EGR rate can be optimized, the influence on engine knock deterioration when EGR enters is improved, and meanwhile, the supercharging control stability and the emission performance of the engine are improved.

The invention discloses a welding fixture for machining a turbine shell, which belongs to the technical field of turbocharger machining and comprises a turntable and adjustable welding clamping mechanisms uniformly distributed in the circumferential direction of the turntable, the adjustable welding clamping mechanism comprises a fixed rack, a movable machine base, an inner supporting type clamping assembly for clamping the turbine shell, an adjustable limiting assembly for positioning the end face of an air inlet of the turbine shell and an adjustable shifting assembly for pushing the turbine shell to rotate. According to the welding clamp for machining the turbine shell, automatic and rapid positioning of the turbine shell can be achieved so that a rocker arm can be welded conveniently, and the welding clamp can adapt to turbine shells of different models.

The invention discloses a surge valve control method and device, electronic equipment and a vehicle, relates to the field of engines, and aims to determine whether an engine is in a target working condition representing that a supercharger is liable to have a surge phenomenon or not. And on the basis of determining that the engine is in the target working condition, according to the intensity of the change of the operation state of the engine under the target working condition, when the engine is determined to be in a relatively strong transient working condition, whether a surge valve is opened or not is determined in time in combination with the opening degree of a throttle valve. And when it is determined that the surge valve is not opened, whether the surge valve is opened or not is further determined according to the air inlet flow of the engine and the opening degree of the throttle valve. Whether the surge valve is opened or not is judged according to the target working condition, the strong transient working condition and the surge flow of the engine in sequence, the multiple working conditions and operation conditions of the engine are synthesized, the opening condition of the surge valve is more accurately determined, the situation that the surge valve is opened abnormally can be effectively reduced, and therefore the situation that power of the engine is insufficient is effectively reduced.

The invention provides a marine engine turbocharger fault prediction method based on digital twinning. The marine engine turbocharger fault prediction method comprises the steps that operation parameters and vibration signals of a marine turbocharger are acquired; performing signal processing on the vibration signal; establishing a three-dimensional solid model of the supercharger; establishing a fluid excitation reconstruction model and a vibration response model according to the three-dimensional entity model; performing all-condition fault simulation based on the vibration response model to obtain fault data; constructing a full-condition fault data set and training a fault prediction model, and screening sensitive vibration characteristic parameter categories based on various vibration characteristic parameters; according to a data transmission relationship among the fluid excitation reconstruction model, the vibration response model and the fault prediction model, constructing a corresponding data twinborn model; and inputting the operation parameters and the sensitive characteristic parameters corresponding to the real-time vibration signals into a digital twinborn model, and obtaining an output fault type and a fault degree. According to the method, the fault type and degree of the supercharger are accurately predicted, and the reliability and safety of equipment are improved.

The invention relates to the technical field of engines, in particular to a turbocharger and an engine system. The turbocharger comprises a rotating shaft, an integrated bearing and a middle shell, the rotating shaft is sleeved with the integrated bearing, the integrated bearing is sleeved with the middle shell, an oil supply pipeline is arranged in the middle shell and comprises an oil supply inlet, a connecting pipeline, an oil storage chamber, a bearing chamber, an oil outlet pipeline and an oil return cavity which are sequentially communicated, and the integrated bearing is located in the bearing chamber. The oil supply inlet is higher than the bearing chamber, the oil storage chamber is lower than the bearing chamber, and the oil outlet pipeline is higher than the bearing chamber. According to the turbocharger, under the transient working condition, the oil supply amount of the bearing chamber can meet the use requirement; and under the cold start working condition, the oil supply time is short, the rotating shaft is prevented from being abraded, the service life of the rotating shaft is prolonged, and therefore the turbocharger has the long service life.

The utility model relates to a liquid hydrogen storage tank with a vaporizer. Comprising an inner shell used for containing liquid hydrogen; the pressurizing unit comprises a pressurizing pipeline, and a pressurizing valve, a pressurizer and a pressurizing and pressure regulating valve which are sequentially arranged on the pressurizing pipeline in the medium flowing direction; one end of the pressurizing pipeline is connected with the bottom end of the inner shell, and the other end is communicated with the gas-phase space of the inner shell; the pressurizing unit is used for maintaining the pressure of the inner shell at a first pressure; the air supply unit comprises an air supply pipeline, and an air supply valve, a vaporizer, a pressure reducing valve and a check valve which are sequentially arranged on the air supply pipeline in the medium flowing direction; one end of the gas supply pipeline is connected with the bottom end of the inner shell, and the other end is connected with external gas utilization equipment; the vaporizer is used for converting liquid hydrogen into hydrogen, and the pressure reducing valve is used for reducing the pressure of the gasified hydrogen to the pressure required by gas equipment; and the exhaust unit is communicated with the gas phase space of the inner shell and is used for exhausting the overpressure gas. According to the storage tank, gas supply parameters can be changed according to gas use requirements of users, and the applicability is high.

The invention provides a turbocharger performance evaluation method and system, and relates to the technical field of artificial intelligence, and the method comprises the steps of data collection, model establishment, model training, performance state output, performance state evaluation and the like. The system comprises a data acquisition module, a model building module, a model training module, a performance state output module and a performance state evaluation module, the performance of the turbocharger can be comprehensively evaluated based on the equipment aging condition through a built performance degradation model, and the accuracy of turbocharger evaluation is improved.

An apparatus and methods for a rotor pack are provided for a positive displacement supercharger that produces greater engine power output without loss of best seal between the rotors or between the rotors and an interior surface of an enclosing case. The rotors include relief zones and cupped portions at an intake airflow side of each lobe comprising the rotors. The relief zones allow additional airflow to enter the rotor pack while the cupped portions scoop additional airflow into the rotor pack during operation of the supercharger. Tapered radius portions of an enclosing case allow additional airflow to be dragged into the rotor pack. Pressure relief portions on a rotor bearing plate and angled portions on each lobe extend compression events during operation of the rotor pack. The angled portions reduce a margin of the lobes to sharpened edges without affecting the diameter of the margin.

The utility model discloses a cold isostatic press for graphite products, which comprises a base, four corners of the base are provided with supporting legs, the supporting legs are provided with a first supporting plate and a second supporting plate, the first supporting plate is provided with a working cylinder, an end cover capable of covering up and down is arranged right above the working cylinder, and the working cylinder is provided with a second supporting plate. The second supporting plate is provided with a hydraulic supercharger under the working cylinder, the base is provided with a movable static pressure main body, a first cavity is formed in the static pressure main body, and the end cover is matched with the working cylinder and then statically presses in the first cavity; when the cold isostatic press for the graphite product is used, graphite can be pressed into a solid body, the overall structure is stable under high pressure, the safety coefficient is high, the static pressing body is wide in application range, the graphite static pressing requirement is met, and the cold isostatic press is suitable for application and popularization.

A turbocharger device relates to the technical field of internal combustion engine supercharging devices and comprises a bearing body, an oil supply pipeline and an integrated bearing. The integrated bearing comprises a pressing end integrated bearing and a vortex end integrated bearing which are arranged in parallel in the axial direction, the bearing body comprises a bearing seat inner wall face, a supporting sleeve is rotationally arranged in the bearing seat inner wall face, and the pressing end integrated bearing and the vortex end integrated bearing are located on the two sides of the supporting sleeve; the pressure end integrated bearing and the vortex end integrated bearing are correspondingly connected with a first oil supply pin and a second oil supply pin which are communicated with inner cavities of the pressure end integrated bearing and the vortex end integrated bearing in the radial direction, and the first oil supply pin and the second oil supply pin are fixed to the bearing body. The split type bearing system is used for solving the problems that although a split type bearing system in the prior art avoids the influence of high temperature, engine oil consumption is large, inner oil film lubrication is insufficient, and cost is high; although an integrated bearing system realizes low cost and structure simplification, the key problems of sufficient lubrication of an inner oil film, high-temperature reliability of a thrust surface and oil control capacity of a gas compressor side are obviously short.

An exhaust turbocharger has a housing, in which a shaft is mounted by bearings, which carries a turbine wheel, on the one hand, and a compressor wheel, on the other hand. An electric machine has a rotor and a stator. The rotor is secured on the shaft for conjoint rotation therewith and the stator surrounds the rotor radially on the outside. A sleeve, which supports the rotor radially and axially, is arranged between the stator and the rotor. The sleeve has at least one fluid duct, by way of which a cooling fluid can be guided toward the bearings of the shaft.

To early activate a catalyst of a three-way catalyst device for purifying exhaust gas of an internal combustion engine, in a power device including the internal combustion engine using ammonia and ignition fuel as fuel.SOLUTION: A power plant 10 comprises a turbocharger 26 that turbocharges intake air of an internal combustion engine 12 to increase an intake pressure, and a throttle valve 24 that narrows a flow path of an intake pipe 22. When a catalyst in a three-way catalytic device 44 is inactive, a wastegate valve 50 of the turbocharger 26 is opened, or in addition, an intake flow path is narrowed by the throttle valve 24, to lower the intake pressure compared to that in normal time. The lowering of the intake pressure reduces a heat capacity of materials in a cylinder, increases a combustion temperature, and increases an exhaust temperature. High-temperature exhaust gas increases a temperature of the catalyst early, to accelerate activation.SELECTED DRAWING: Figure 1

The invention relates to the technical field of brazing equipment, in particular to welding equipment for automobile supercharger oil pipe machining. Comprising a machine body, a welding gun connected with the machine body is arranged above the machine body, and a mounting frame is mounted at the upper end of the machine body; through cooperation of a clamping plate and a clamping block, in the process that an electric push rod pushes the clamping block through the clamping plate to clamp an oil pipe, the clamping block making contact with the oil pipe is blocked by the oil pipe and extrudes a connecting spring to be close to the clamping plate, and the extruded connecting spring exerts pressure on a pressure sensor; the pressure sensor can detect the clamping force applied to the oil pipe by the clamping block, so that an operator can conveniently and accurately adjust the clamping force of the oil pipe according to a pressure value transmitted to detection equipment by the pressure sensor, the stability of the oil pipe is ensured, meanwhile, the damage to the pipe body of the oil pipe due to the too large clamping force is avoided, and the working efficiency is improved. And a lot of time is not needed to repeatedly try, so that the working time is saved, and the working efficiency and the production progress are improved.

The supercharger valve transmission shaft leakage detection system is applied to the turbine box assembly; the turbine box assembly includes a volute, a valve transmission shaft, a sleeve, a bleed valve and a rocker arm; the supercharger valve transmission shaft leakage detection system includes a plugging mechanism, a detection mechanism, an adjustment mechanism and a PC; the plugging mechanism includes a box body, a plugging plate and a top sleeve; the adjustment mechanism includes a heater, a pressure regulating valve and an actuator; the detection mechanism includes a pressure gas source, a gas flow meter, a temperature sensor and a pressure sensor; the PC is electrically connected to the gas flow meter, the temperature sensor, the pressure sensor, the heater, the pressure regulating valve and the actuator respectively. The utility model can simulate the motion state and working environment of the valve transmission shaft, detect the leakage of the valve transmission shaft, and thus realize the evaluation of the dynamic sealing performance of the valve transmission shaft.

The invention relates to the technical field of power energy and ship resistance reduction, and discloses an internal combustion engine compressed air and electric supercharger ship bubble resistance reduction air supply control system which comprises an internal combustion engine set, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger and an electric supercharger, and the internal combustion engine set serves as a power source of the whole system and generates excessive compressed air by delaying the closing moment of an intake valve during conventional operation; the gas-liquid separator is arranged on one side of the internal combustion engine set and used for separating liquid impurities of the compressed air and discharging the liquid impurities regularly; the filter is arranged on the side, away from the internal combustion engine set, of the gas-liquid separator and used for further filtering the compressed air; the first gas storage tank is arranged on the side, away from the gas-liquid separator, of the filter. Compressed air of the internal combustion engine and exhaust gas of the internal combustion engine are used for replacing traditional independent air compression equipment, the effect of reducing the requirement for additional compression equipment is achieved, the problem that a traditional ship bubble drag reduction air supply system is high in energy consumption is solved, the energy utilization efficiency of ship operation is improved, and the overall energy consumption cost is reduced.

The invention relates to the technical field of micro-pressure oxygen cabins, in particular to an intelligent integrated oxygen generation and coordinated regulation and control method for a micro-pressure oxygen cabin, which comprises the following steps: supplying air to a cabin body of the micro-pressure oxygen cabin by adopting an air compressor, stably increasing the pressure in the micro-pressure oxygen cabin and stabilizing the pressure at a preset treatment pressure of 30kPa-50kPa through an intelligent pressure regulation and control system, high-pressure air in the micro-pressure oxygen cabin body serves as an oxygen production source and is conveyed to the VPSA oxygen production main machine; the VPSA oxygen production main machine adsorbs nitrogen through a zeolite molecular sieve filled in the VPSA oxygen production main machine and collects oxygen; s2, pressurizing the oxygen collected in the step S2 to 0.1-0.4 MPa or above through a supercharger, conveying the oxygen back into the micro-pressure oxygen cabin body, and allowing the user to breathe through an oxygen supply device; an intelligent cooperative control system is constructed, integrated management is carried out on the whole process of pressure boosting, pressure stabilization, oxygen generation, oxygen supply, safety and environment regulation and control, the occupied area and the purchase cost of equipment are reduced, the human error risk is reduced, and the micro-pressure oxygen treatment requirement under multiple scenes is met.

The invention discloses an engine control method and a related device, and relates to the field of engines, an engine is provided with two EGR branches which are respectively connected with a large turbine runner and a small turbine runner, an engine controller determines a corresponding target EGR rate based on target performance parameters of the engine, a small runner EGR valve is controlled to be opened, and the small runner EGR valve is controlled to be closed. If the target EGR rate can be reached by only opening the small-flow-channel EGR valve, outputting a corresponding first target small-flow-channel EGR valve opening degree, and if the opening degree of the small-flow-channel EGR valve reaches the first set maximum opening degree and the corresponding EGR rate does not reach the target EGR rate, controlling the large-flow-channel EGR valve to be opened to reach the target EGR rate, and outputting a corresponding second target small-flow-channel EGR valve opening degree and a target large-flow-channel EGR valve opening degree. Two-way EGR gas taking is achieved by controlling the opening degree of the two-way EGR valve, the EGR rate is improved, meanwhile, the pumping loss and the rotating speed of the supercharger are reduced, and therefore oil consumption and NOx emission are reduced.

The invention relates to the technical field of diesel engine power control, in particular to a control method for reducing plateau power loss of a supercharged diesel engine through EGR. The working condition point of current operation is obtained through the engine rotating speed sensor and the accelerator position sensor, the electronic control unit corrects the main injection advance angle and the rail pressure according to the current altitude, and then the opening degree of the EGR valve is calculated and controlled according to the air amount demand value and the actual air inflow measured by the PFM air flow meter. When the altitude simulation test bench performs external characteristic tests under various altitudes, the main injection advance angle, the rail pressure and the air quantity demand quantity of the diesel engine are continuously debugged by combining the rotating speed of a diesel engine supercharger, the vortex front exhaust temperature and the smoke intensity value tested by the bench, and finally the EGR opening degree value and the external characteristic oil quantity value under the altitude condition are determined. And obtaining the maximum plateau power result under the altitude condition.

The invention discloses a crankcase air supply system, a crankcase air supply control method, a controller and a vehicle, and relates to the field of hydrogen internal combustion engines. The crankcase air supply system comprises a first air supply pipeline communicating with an air outlet of a supercharger and a first end of a four-way valve, and a second air supply pipeline communicating with an air outlet of a pressurized air storage tank and a second end of the four-way valve; the air outlet of the air filter of the hydrogen internal combustion engine is communicated with the third end of the four-way valve, the four-way valve is communicated with the air supply port of the crankcase, and when the hydrogen internal combustion engine is in a high-load and high-moisture state, the opening degree of the first flow adjusting valve is controlled to be larger than that of the second flow adjusting valve. The opening degree of the second flow adjusting valve is larger than that of the third flow adjusting valve. The method is implemented on the basis of the supercharger, the pressurized gas storage tank and the air filter, and the opening degree of each flow regulating valve is regulated, so that the inlet gas water content is reduced while the gas supplementing requirement of the crankcase is met, and the aim of improving the operation reliability of the hydrogen internal combustion engine is achieved.

The invention provides a control method and device for a mechanical supercharging clutch, the method is suitable for the technical field of control, and the method comprises the steps that the engine rotating speed and the circulating fuel injection quantity of an engine are collected, and the accelerator change rate and the actual excess air coefficient of the engine are calculated; according to the rotating speed of the engine, the circulating fuel injection quantity, the accelerator change rate and the actual excess air coefficient, the mechanical supercharging enabling state of the mechanical supercharger is determined; when it is determined that the mechanical supercharging enabling state is set to 1, whether the engine rotating speed is smaller than or equal to the rotating speed limiting value when a mechanical supercharging clutch is combined or not is judged; if the rotating speed of the engine is smaller than or equal to the rotating speed limit value, the mechanical supercharging clutch is controlled to be combined, impact abrasion to the combining surface in the combining process of the mechanical supercharging clutch caused by overhigh rotating speed is avoided, and the service life of the mechanical supercharging clutch is prolonged.

Provided is a downhole tool, a well system, and a method. The downhole tool, in one aspect, includes a mandrel, a sliding element positioned radially about the mandrel, and a pressure intensifier positioned radially about the mandrel and coupled to the sliding element. In one aspect, the pressure intensifier includes a first piston having a first pressure receiving end with a larger piston surface area (AL1) and a first pressure output end with a smaller piston surface area (AS). In one aspect, the pressure intensifier includes a second piston coupled to the first piston, the second piston having a second pressure receiving end with a larger piston surface area (AL2). In one aspect, a fluid chamber is defined between the first pressure output end and the second pressure receiving end. In one aspect, the pressure intensifier is configured to move the sliding element with an applied force.

The invention provides an in-cylinder braking power control method and device, a diesel engine and a diesel locomotive, and relates to the technical field of engines. The in-cylinder braking power control method comprises the steps that an activation result is obtained; when the activation result indicates that the in-cylinder braking function of the diesel engine is activated, the initial opening degrees of a supercharger bypass valve and an air inlet throttle valve and the initial inter-cooling post-pressure jointly corresponding to the initial opening degrees of the supercharger bypass valve and the air inlet throttle valve are obtained according to rack calibration data of the diesel engine; and when the initial post-intercooling pressure is not equal to the preset expected post-intercooling pressure, the initial opening degree of the supercharger bypass valve and / or the air inlet throttling valve is adjusted in a closed-loop mode, and the respective corrected opening degrees of the supercharger bypass valve and the air inlet throttling valve are obtained till first corrected post-intercooling pressure jointly corresponding to the respective corrected opening degrees is equal to the expected post-intercooling pressure. The problem that a diesel engine breaks down or is damaged or scrapped due to the fact that the braking power is not adjustable in the braking process in the existing in-cylinder braking technology can be solved.

The invention discloses turbocharger shell visual inspection equipment, and relates to the technical field of turbocharger shell detection, the turbocharger shell visual inspection equipment comprises a positioner, the positioner comprises a rack, first motors are installed on the upper areas of stand columns on the two sides of the rack, adjusting frames are fixedly installed at the output ends of the first motors, and the bearing area of each adjusting frame is of a hollow frame structure; supporting structures are welded to the short-diameter edges of the two sides of the hollow frame structure, the supporting structures are fixedly connected with the output end of a first motor, first rails are transversely and fixedly installed on the tops of the long-diameter edges of the two sides of the hollow frame structure, and two shell alignment assemblies are slidably connected to the first rails; the two sets of alignment assemblies each comprise two sliding supports connected to the first track in a sliding mode, a bearing rod is arranged between the two sliding supports, a supporting plate is welded to the surface of the bearing rod, a second motor is fixedly installed on the side wall of one sliding support, all-directional detection is conducted on the surface of the shell, and the situation that dead corners, bent positions and clamping positions cannot be detected is avoided.

The invention relates to the technical field of turbocharger welding, and discloses turbocharger machining automatic welding equipment which comprises a welding table and further comprises a driving clamping mechanism, an automatic welding mechanism, an automatic welding mechanism and an automatic welding mechanism. The two driven clamping mechanisms are arranged on the welding table, located on the two sides of the driving clamping mechanism and used for clamping the two turbines; the two sets of positioning mechanisms are arranged on the two sides of the welding table and used for positioning the turbine; wherein the driving clamping mechanism comprises two fixing seats. Through cooperation of the driving clamping mechanism and the driven clamping mechanism, automatic centering and positioning of a turbine shaft and a turbine are achieved, an adjusting ring in the driving clamping mechanism pushes a sliding rod through an arc-shaped hole, so that multiple clamping rods synchronously move in the radial direction, automatic centering and clamping of the turbine shaft are achieved, and due to the design of an arc-shaped extension clamping plate of the driven clamping mechanism, the clamping efficiency is improved. And when the turbine is clamped, accurate centering with the turbine shaft is completed, the clamping precision and efficiency are remarkably improved, and the error problem existing in traditional manual centering is effectively avoided.

The invention discloses a turbine service life prediction method, system and device and a storage medium, and relates to the technical field of engines, and the method comprises the steps: fitting a stress spectrum according to the actual working rotating speed spectrum of a turbine and the relation between the rotating speed and the stress; calculating the total fatigue damage at the blade root of the turbine blade after the target working duration based on the stress spectrum; calculating the total creep damage at the blade root of the turbine blade after the target working duration based on the stress spectrum, the rotating speed spectrum of actual operation and the temperature spectrum; and predicting the comprehensive life of the turbine according to the total fatigue damage and the total creep damage. According to the method, the fatigue creep comprehensive life prediction method under the given actual road spectrum is constructed, the working life of the supercharger turbine can be predicted more accurately by comprehensively considering various influence factors of the turbine under the actual working condition, and therefore the performance and safety of the turbine are improved, and stable operation of the turbine is guaranteed.

The invention provides a control device for an intercooling bypass and an EGR cooler bypass in an engine, and belongs to the technical field of engines, the control device comprises a multi-way butterfly valve provided with at least three airflow channels, and the input end of the multi-way butterfly valve is communicated with a supercharger; the EGR cooler is arranged on the EGR cooling branch, one end of the EGR cooling branch communicates with the EGR loop, and the other end of the EGR cooling branch communicates with the intake manifold; one end of the EGR bypass branch communicates with the EGR loop through a first airflow channel of the multi-way butterfly valve, and the other end of the EGR bypass branch communicates with the EGR cooling branch and is located between the EGR cooler and the intake manifold; one end of the inter-cooling bypass branch is communicated with the intake manifold, and the other end of the inter-cooling bypass branch is communicated with a second airflow channel of the multi-way butterfly valve; and one end of the intercooler communicates with the intake manifold, and the other end of the intercooler communicates with the third airflow channel of the multi-way butterfly valve. By additionally arranging the multi-way butterfly valve, the purpose of adjusting the cooling strategies of the EGR system and the intercooling system at the same time is achieved.

The turbocharger impeller comprises a first impeller disc and a limiting shell, a plurality of concave sliding grooves are formed in the upper surface of the first impeller disc, the interiors of the concave sliding grooves are connected with convex sliding blocks in a sliding mode, the upper surfaces of the convex sliding blocks are fixedly connected with impeller blades, and the lower surfaces of the convex sliding blocks are fixedly connected with the limiting shell. Inserting grooves are formed in the two sides of the upper surface of the limiting shell, bolts matched with the inserting grooves are fixedly connected to the two sides of the upper surface of the first impeller disc, and the surfaces of the bolts are sleeved with fixing nuts in a threaded mode. According to the device, the concave sliding grooves and the convex sliding blocks are arranged, so that the device can simply and conveniently disassemble and assemble the impeller blades, when a certain impeller is damaged in the using process of the turbocharger, the damaged impeller can be directly disassembled, and the limiting shell is arranged, so that the impeller can be conveniently disassembled and assembled. And the device can limit the impeller blades into the first impeller disc through the limiting shell, and dislocation of the impeller blades is avoided when the turbocharger works.

The invention relates to the technical field of locomotive diesel engine equipment, in particular to a method and device for predicting the service life of a rotating part of a diesel engine supercharger, and the method comprises the steps: obtaining the first remaining service life of the rotating part of the supercharger through accounting according to the turbine inlet temperature according to a first formula; according to a second formula, obtaining a second remaining service life of the supercharger rotating part accounting according to the rotating speed of the supercharger; according to a third formula, obtaining a third residual service life of the supercharger rotating piece accounting according to the pressure of the engine oil inlet of the supercharger; and obtaining the remaining service life of the supercharger rotating part according to a fourth formula. According to the method for predicting the service life of the rotating part of the supercharger of the diesel engine, the service life of the rotating part of the supercharger can be predicted in real time, necessary maintenance and overhaul can be carried out on the supercharger in time, the fault rate and the fault influence of the rotating part of the supercharger are reduced, and therefore the safety of the diesel engine is improved, and the operation and maintenance cost is reduced.

The invention belongs to the technical field of marine turbochargers, and discloses a marine turbocharger floating ring bearing rotor system lubrication model construction method, which comprises the following steps: S1, respectively carrying out physical modeling and mathematical modeling according to a real object of a three-blade and half-floating ring bearing of a marine turbocharger, and solving; s2, according to the oil film temperature-viscosity effect, the steady-state heat balance, the power consumption and the flow, a steady-state thermal fluid dynamic lubrication analysis model of the three-blade and semi-floating-ring bearing is constructed, and the static characteristics of the three-blade and semi-floating-ring bearing are obtained; s3, establishing a lubricating and wear characteristic theoretical calculation model in the starting process and the transient variable working condition process after starting, and obtaining the transient film thickness, the transient oil film force and the transient rough bearing force in the starting process; and the transient film thickness and the transient oil film bearing capacity after work starting are obtained. According to the method, a floating ring bearing rotor system lubrication model is constructed, the operation performance and safety of the marine turbocharger are improved, and the service life of the marine turbocharger is prolonged.

The invention belongs to the technical field of biomass energy power generation, and particularly relates to a decoupling type biomass gasification power generation system and a multi-parameter cooperative control method.The method comprises the steps that 1, biomass raw materials are fed into a vertical multi-section decoupling gasification furnace to be gasified, a gasifying agent and water vapor are introduced into the decoupling gasification furnace, and the biomass raw materials are gasified by adjusting the introduction amount of the gasifying agent and the water vapor; the temperature of a reduction zone is controlled to be 700-900 DEG C; 2) cooling a gasification product of the decoupling gasification furnace through a heat exchanger, performing primary filtration through a filter I, removing moisture through a steam-water condensation separator, pressurizing through a Roots blower, performing secondary filtration through a filter II, and feeding into an internal combustion engine for power generation; and (3) gas exhausted by the internal combustion engine is supercharged by an exhaust turbocharger, compressed by a compressed air generator and sent to the decoupling gasifier as a gasifying agent. The system has the advantages that in-situ high-temperature catalytic cracking of tar, efficient utilization of waste heat and stable operation of the system can be realized, the power generation efficiency is improved, and meanwhile, the equipment cost is reduced.