1983 results about "Diesel engine" patented technology

The invention discloses a digital twin intelligent test run system based on a marine medium-speed diesel engine and a monitoring method, relates to the technical field of monitoring, and is used for solving the problems of degeneration identification lag and low emission early warning precision of an oil injector. The system comprises a multi-source heterogeneous data preprocessing module and a running state intelligent diagnosis module. The multi-dimensional data acquisition module is used for acquiring in-cylinder pressure, crankshaft torsional vibration and transient air-fuel ratio signals to construct multi-dimensional data vectors, and the multi-dimensional data acquisition module is used for analyzing combustion fluctuation characteristics based on an attention mechanism LSTM (Long Short Term Memory) network, identifying early deterioration of an oil injector and outputting an oil injection consistency coefficient and a fault type identifier. The method comprises the steps that according to an oil injection consistency coefficient, electromagnetic valve response delay and combustion parameter correlation are tracked, a degradation trend is predicted, and emission early warning is generated; and according to prediction and early warning results, fuel injection compensation parameters are dynamically adjusted in the digital twinborn model, a recursive least square method is adopted to identify combustion parameters and feed the combustion parameters back to an electric control unit, and self-adaptive optimization and closed-loop control in the test run stage are achieved.

The invention relates to the technical field of ship propulsion power generation system control, in particular to a constant-power rotating speed control method and system for a ship shaft generator, and the method comprises the following steps: obtaining operation state parameters and ship environment parameters of a ship propulsion power generation system; based on the operation state parameters and the ship environment parameters, the influence of the adjusting action of the shaft generator on the rotating speed of a main propulsion diesel engine and the influence of the adjusting action of a main propulsion diesel engine speed adjusting device on the output power of the shaft generator are pre-judged, and an interactive pre-judgment result is obtained; according to the interactive pre-judgment result, jointly deciding and generating a first adjusting instruction for adjusting an axle generator and a second adjusting instruction for adjusting a main propulsion diesel engine speed adjusting device; by introducing an interactive pre-judgment and joint decision-making mechanism, the negative interaction between the shaft generator and the main propulsion diesel engine speed regulation device can be effectively identified and eliminated, and the operation stability and safety of the ship under the severe sea condition are improved.

A center hole is formed in a base, the lower end of a guide sleeve is coaxially fixed to the upper end of the base, a lower die is installed in the guide sleeve in a matched mode, and the lower end face of the lower die makes contact with the upper end face of the base. The conical section at the upper end of the valve rod and the lower half portion of the large-diameter section are matched with a lower die hole in the upper end of the center hole of the lower die, the upper die is arranged in the guide sleeve in a matched mode, an upper die hole in the lower end of the center hole of the upper die is matched with the large-diameter section of the valve rod, and the upper end of the upper die extends out of the guide sleeve. And the upper end of the valve rod is deformed and turned inwards until the belleville spring and the maximum-diameter position of the lower end of the valve head are completely wrapped in the stepped hole of the large-diameter section of the valve rod. According to the utility model, the technical problem that the valve rod assembly of the indicator valve cannot be directly assembled is solved, the problem that the valve head is arranged in the inner hole of the valve rod and the stroke of the valve is ensured by accurately controlling the length of the inner cavity when the valve head, the valve rod and the belleville spring of the indicator valve are assembled is effectively solved, the valve rod assembly is ensured to be smoothly assembled, and the assembling quality and the processing efficiency are ensured.

Disclosed are an apparatus for a simulation test of diesel engine fuel spray in an alpine environment and a test method, the apparatus comprising a fuel storage and pretreatment device, a fuel injection system, an optical visualization system, an environment chamber, and a spray pretreatment system. In alpine environmental conditions, the apparatus can achieve high-pressure injection of liquid, separate injected atomized mist into fine droplets and impinge same on a wall surface by means of a multi-droplet generation apparatus and a wall surface apparatus, and observe and record the whole process by means of an optical visualization path. According to the present invention, the problem of difficulty in distinguishing droplets due to the coalescence of spray into a sheet is avoided, the costs of a traditional spray and droplet test solution can be significantly reduced, and the problem of a high level of dependence on a control program in a constant volume vessel solution is solved. According to the present invention, simulation of spray test in an alpine environment is possible, and the test apparatus has a simple structure. Moreover, it is possible to conduct regular research on free spray, multi-droplet wall impingement, spray wall impingement, and development characteristics thereof under conditions such as different altitudes and different temperatures.

A diesel engine crankshaft residual stress and deformation relation prediction method belongs to the technical field of internal combustion engine key component manufacturing. The method comprises the steps of dynamically correcting a finite element model through multi-stage measured data, performing high-precision reconstruction of a crankshaft residual stress field, establishing a quantitative relation between stress distribution and deformation, and combining numerical simulation and response surface method optimization to realize high-precision residual stress distribution prediction. And further analyzing the release and redistribution rules of the residual stress in the material removal process. Residual stress distribution is actively controlled to prolong fatigue life, and stable production of high-precision and long-life crankshafts is ensured. The grinding feeding rate is reduced through active control over residual stress in the grinding process so that the tensile stress peak value in the layer depth direction can be reduced, and meanwhile it is guaranteed that the surface roughness is within a proper interval. A gradient cooling strategy is adopted, the cooling liquid flow is increased in the initial grinding stage, and surface layer thermal stress accumulation is restrained. And the grinding wheel linear speed is controlled, and grinding efficiency and residual stress inhibition requirements are balanced.

The utility model discloses a gearbox for an oil-electricity double-engine ship. The gearbox comprises a box body, the diesel oil input component comprises a first input shaft, a first driving gear is sleeved on the first input shaft, and the first input shaft is provided with a first transmission gear and a first clutch; the reversing shaft part comprises a reversing shaft, a second driving gear is sleeved on the reversing shaft, the reversing shaft is provided with a second transmission gear and a second clutch, and the second transmission gear is meshed with the first transmission gear; the motor input component comprises a second input shaft, the second input shaft is sleeved with a third driving gear in an empty mode, the third driving gear is meshed with a first driven gear, the second driving gear is fixedly sleeved with the first driven gear, and the second input shaft is provided with a third clutch; the output shaft component comprises an output shaft and a second driven gear, and the second driven gear is meshed with the first driving gear and the second driving gear. According to the scheme, the diesel engine or the motor is independently used for driving, intelligent switching of the diesel engine and the motor can be achieved at any speed, oil consumption is reduced, and power performance is improved.

The invention aims to provide a marine diesel engine operation parameter anomaly detection method based on spatial-temporal feature fusion, and belongs to the field of diesel engine detection. The method comprises the following steps: collecting time sequence data of multiple sensors under a normal working condition of a diesel engine, and dividing the time sequence data into a training set and a verification set; multi-sensor monitoring data of the diesel engine in an abnormal state are collected to form an independent test set. And establishing an MsBTC-Net formed by a diesel engine operation parameter predictor and an operation parameter anomaly detector, inputting the verification set into an MsBTC-Net predictor model, obtaining a predicted value of the verification set at each time step of the diesel engine monitoring parameter, and calculating a predicted residual by combining an actual value of the monitoring parameter. And then a Mahalanobis distance threshold value is calculated, and an MsBTC-Net operation parameter anomaly detector is constructed. According to the method, the multi-dimensional operation monitoring parameters of the diesel engine are predicted, the performance of abnormal detection of the operation parameters of the diesel engine is effectively improved, the detection sensitivity of early fault weak signals of the diesel engine is remarkably enhanced, and the method has engineering application value.

The invention relates to the technical field of hybrid power system power distribution, and provides a hybrid power operation platform power distribution method suitable for narrow lane operation. A state acquisition module, a fuzzy preprocessing unit, a particle filter estimation unit, a model prediction control unit and a self-adaptive control unit are designed, vehicle inclination angle, load and wheel speed data are acquired in real time, and terrain uncertainty factors are output through fuzzy logic processing; estimating hidden state variables such as the wheel slippage rate and the energy margin by adopting a particle filtering algorithm; performing multi-stage power distribution optimization by applying a model predictive control technology to realize coordinated control of the diesel engine and the electric pump; and finally, self-adaptive feedback and switching are executed, wherein the power modes are switched according to the uncertainty factors, inclination angle and load safety protection is implemented, and braking energy is recycled. The terrain adaptability, the power distribution precision and the energy utilization efficiency of the working platform in the narrow lane complex environment are effectively improved, and meanwhile the operation stability and the environment friendliness are enhanced.

The invention provides a diesel engine cylinder fault diagnosis method and system based on MMFE-PSO-KELM, and the method comprises the steps: S1, collecting a vibration signal of the surface of a cylinder cover of a diesel engine cylinder and a rotating speed signal of a crankshaft, and carrying out the preprocessing of the vibration signal; s2, an MMFE algorithm is adopted to analyze and process the preprocessed vibration signals, and MMFE feature vectors rich in high-frequency and low-frequency fault mode information are constructed; s3, optimizing a regularization parameter C and a kernel function parameter sigma of the KELM model by using a PSO (Particle Swarm Optimization) algorithm, and searching an optimal parameter combination which maximizes the classification accuracy by taking the classification accuracy as a fitness function; and S4, constructing a KELM diagnosis model based on the optimal parameter combination, and performing fault diagnosis on the diesel engine cylinder by taking the high-frequency and low-frequency fault mode information extracted by the MMFE algorithm as input. According to the method, strong noise interference can be effectively inhibited, fault feature information can be comprehensively reserved, KELM key parameters can be optimized, and the accuracy and reliability of fault diagnosis of the diesel engine cylinder are improved.

The invention provides a vehicle diesel engine bench simulation emission test method, system, device and medium, and belongs to the bench test technology field, a test bench and a test device are configured, a flowmeter and an analyzer are calibrated through a linear regression equation, and a mapping relation between a measured value and an output quantity is established; an engine transient working condition model is constructed based on real vehicle data, and mapping of the rack control process and the real vehicle operation working condition is achieved; configuring the rotating speed, the torque, the air inlet temperature and the air inlet humidity controlled by the rack as boundary conditions, evaluating the control following performance through a correlation coefficient calculation mode, and verifying the environmental parameter consistency based on a mean value deviation; calculating the exhaust flow, and configuring measurement data based on the intake flow and the fuel consumption; executing a transient test, and obtaining real-time data of an engine running state and discharged pollutants; and under the condition that the double boundary condition constraints are met, carrying out equivalence analysis on a rack and a real vehicle emission result.

According to the off-grid energy management method, the real-time state of charge (SOC) of an energy storage battery is compared with a preset high electric quantity threshold value and a preset low electric quantity threshold value, and a diesel engine priority mode set by a user and real-time load and power conditions are combined; and dynamically selecting an optimal solution from a plurality of preset operation conditions. Through multi-source cooperation and intelligent scheduling, start-stop and working modes of the photovoltaic module, the diesel engine module and the inverter module can be intelligently controlled, seamless switching and optimal distribution among different energy sources are realized, power supply continuity and economy are ensured, and the service life of energy storage equipment is effectively prolonged.

The invention relates to the technical field of oil cylinder detection, and discloses a movable engine unit protection mute shell and an engine unit, the movable engine unit protection mute shell comprises a cabinet body, a door body is arranged on the front side of the cabinet body, a mute plate is embedded in the inner wall of the cabinet body, an electric sliding rail is arranged in the cabinet body, and a sliding plate is slidably connected to the upper side of the electric sliding rail; a diesel engine unit is fixedly installed on the upper surface of the sliding plate, a cooling mechanism is arranged in the cabinet body, a heat exchange pipe is filled with cooling liquid, when the diesel engine unit works, generated heat enables the cabinet body to be filled with high-temperature gas, and at the moment, the cooling liquid in the heat exchange pipe and the high-temperature gas in the cabinet body generate a heat exchange effect; the temperature in the cabinet body is reduced, heat in the cabinet body is eliminated, and the technical problems that an existing generator set can generate some heat in the working process, and if the heat in the closed cabinet body cannot be eliminated, the heat can damage the cabinet body and generator set equipment are solved.

The invention relates to the technical field of internal combustion engine superchargers, and discloses a time window dynamic adjustment method and system for fault diagnosis of a diesel engine supercharger, and the method comprises the steps: extracting time sequence data of key characteristic parameters of the diesel engine supercharger through mechanism analysis when the fault diagnosis of the diesel engine supercharger is carried out based on deep learning; after preprocessing, inputting into a fault diagnosis model; and adaptively adjusting a time window of the fault diagnosis model based on the principal component analysis result, so that the time window is adjusted according to the fluctuation change of the feature data. According to the method, the time window of the turbocharger in the actual working condition data can be dynamically adjusted, the concept of time domain-feature domain double closed-loop control is utilized, principal component analysis is improved from a traditional dimension reduction tool to a dynamic system regulator, a quantitative mapping model of the window length and the working condition data is established, and on the premise that feature information is guaranteed, the real-time performance of the turbocharger is improved. And the data processing amount of the window can be effectively reduced.

The invention relates to a vibration control design method for a ship low-speed motor direct propulsion long shafting, and the method comprises the steps: determining the position of a low-speed motor output flange and the central position of a propeller, determining the positions of a thrust bearing, an intermediate bearing, a tail pipe bearing and the like, arranging the span of the bearings, arranging the number of the bearings, and calculating the shafting strength. Torsional vibration calculation of the long shaft system of the low-speed motor, torsional vibration calculation result analysis, centering calculation of the long shaft system of the low-speed motor, cyclotron vibration calculation of the long shaft system of the low-speed motor, longitudinal vibration calculation of the long shaft system of the low-speed motor, fatigue analysis of a thrust bearing, verification of whether the thrust bearing meets the load requirement or not, shaft system jacking verification, and the like. And finally verifying the shafting vibration control design effect through a navigation test. Different from conventional diesel engine propulsion and high-speed motor propulsion shafting design, the method starts from the characteristics of a low-speed motor direct propulsion shafting, and analysis is carried out through shafting strength design, torsional vibration, centering, rotation, longitudinal vibration, installation and other systems, so that the risks of shafting load imbalance and abnormal vibration are avoided.

The invention discloses a diesel engine piston material, a diesel engine piston casting method and a diesel engine piston, and relates to the technical field of composites.The diesel engine piston material comprises, by weight, 12.0%-12.5% of Si, 5.6%-5.8% of Cu, 3.0%-3.4% of Ni, 0.1%-0.3% of Mg, 0.1%-0.3% of Mn, 0.4%-0.6% of Fe, 0.10%-0.14% of Ti, 0.10%-0.14% of V, 0.10%-0.14% of Zr, 0.02%-0.06% of Cr and the balance Al and alkali metal impurity elements. The high-strength and heat-resistant aluminum alloy material special for the diesel engine piston is obtained by taking the aluminum alloy as a base body and coordinating multiple alloy elements and accurately regulating and controlling the proportion of all the alloy elements, the material meets the long-term service requirements of the high-load diesel engine piston at the high temperature of 350 DEG C and under the explosion pressure of 20 Mpa of 107 times or above high-frequency reciprocating loads, and the service life of the high-load diesel engine piston is prolonged. And the working conditions of high detonation pressure and thermal load of the diesel engine piston are met, so that the high-temperature mechanical property, long-term service reliability and safety stability of the piston are improved.

The invention aims to provide a marine engine lubricating oil system fault diagnosis method based on multi-source domain transfer learning, and belongs to the field of engine fault diagnosis. Comprising the following steps: carrying out multi-working-condition signal acquisition and pretreatment on the marine engine lubricating oil system; constructing a multi-source domain transfer learning model; performing multi-source domain transfer learning model training and optimization to obtain a diesel engine fault diagnosis model based on multi-source domain transfer learning; and performing cross-working-condition fault diagnosis on the diesel engine to obtain a fault diagnosis result. According to the method, multi-source domain data collected under different working conditions are integrated, and deep feature extraction and fusion of the monitoring signals of the lubricating oil system of the engine are realized. According to the method, feature distribution between each source domain and the target domain is effectively aligned, and common fault features in multi-source-domain data are fully mined and utilized, so that the diagnosis model has relatively high cross-working-condition diagnosis capability while realizing fault prediction.

The invention relates to the technical field of diesel engine connecting rod surface treatment equipment, in particular to a conveying device for diesel engine connecting rod surface treatment. Comprising a hanger rail, a rack, a tackle and a suspension mechanism, the hanger rail is arranged above the rack, a treatment groove is formed in the upper side of the rack, the tackle is slidably installed on the hanger rail, the suspension mechanism is connected with the tackle through a lifting driving piece, and the lifting driving piece is used for driving the suspension mechanism to move up and down; the suspension mechanism further comprises an elastic oscillation starting piece and oscillation starting rails installed on the two sides of the rack, the output end of the lifting driving piece is elastically connected with the suspension mechanism through the elastic oscillation starting piece, and a plurality of evenly-distributed conical protrusions are arranged on the oscillation starting rails. It is ensured that the whole surface of the connecting rod is processed under the more consistent condition; therefore, more uniform dissolution rate and surface smoothness are obtained; defects such as stripes, pitting corrosion and cloud spots caused by bubble retention or uneven current are obviously reduced in a moving state.

The utility model discloses a diesel engine flywheel gear ring gap detection device, which comprises a base, a rotating shaft, an inner gear, an outer gear and a measuring instrument, the base is detachably arranged at the connection position of a flywheel housing and a starting motor, the rotating shaft is arranged on the base through a bearing, and the inner gear is arranged at one end of the rotating shaft, extends into the flywheel housing and is meshed with a flywheel gear ring. The outer gear is installed at the other end of the rotating shaft, located outside the flywheel housing and close to the measuring instrument, the inner gear and the outer gear rotate synchronously, and the measuring instrument detects rotation of the outer gear. During measurement, the base is installed on the flywheel cover shell, the meshing state is fed back to the outer gear through meshing of the inner gear and the flywheel gear ring, then the clearance of the gears is reflected through rotation of the outer gear, the clearance amount of the inner gear and the flywheel gear ring can be clearly measured, and the measurement accuracy and convenience are improved.

A transportation vehicle capable of realizing a cleaning function of an exhaust gas purifying device while suppressing increase in the weight and costs. The transportation vehicle comprises: a diesel engine; a generator; a traveling motor; a grid box that converts the electric power generated by at least one of the generator or the traveling motor into heat to consume the electric power; an exhaust gas purifying device, and a controller configured to, in a case of causing the generator to generate load necessary to increase a temperature of the exhaust gas to a cleaning temperature, if determining that additional electric power additionally generated by the generator can be consumed by the grid box, cause the generator to additionally generate the additional electric power to remove the harmful substances deposited on the exhaust gas purifying device, and causes the grid box to additionally consume the additional electric power.

The invention relates to the field of monitoring, sensing and early warning, and discloses a marine diesel engine alarm system which comprises a data acquisition module used for acquiring various physical parameters in the operation process of a marine diesel engine; the data preprocessing module is used for carrying out denoising, normalization and time synchronization processing on the physical parameters; the state modeling module is used for constructing a mathematical model reflecting the running state of the diesel engine based on the preprocessed physical parameters; the feature extraction module is used for extracting feature information reflecting a fault trend or disturbance from the mathematical model; the alarm judgment module is used for generating an alarm signal according to the feature information extracted by the mathematical model; and the alarm output module is used for outputting the alarm signal, recording alarm information and feeding back the alarm information to a system management end. According to the invention, through multi-dimensional parameter fusion and a self-adaptive alarm mechanism, the accuracy and response speed of fault early warning of the marine diesel engine are improved, and false alarms and missing alarms are reduced.

The utility model belongs to the technical field of mechanical structures, and particularly relates to a hybrid power system of a combine harvester, which comprises a master controller, a battery component, a generator, a threshing mechanism, a header conveying mechanism, a diesel engine, a traveling mechanism, a fan device and an auger vibrating screen mechanism. The battery assembly and the generator are electrically connected with the master controller. The diesel engine is electrically connected with the master controller through the engine controller; the threshing mechanism and the header conveying mechanism are electrically connected with the master controller through the electric drive unit. The power output end of the diesel engine is sequentially connected with the fan device, the walking mechanism and the generator, and a clutch I is arranged between the walking mechanism and the diesel engine; and the auger vibrating screen mechanism is in transmission connection with the power output end of the fan device. According to the technical scheme, energy utilization and economical efficiency are both considered, pollutant emission is reduced, endurance and operation efficiency is improved, power transmission control is flexible, mechanism driving modes are diversified, and many disadvantages of a traditional power system are overcome.

The invention relates to the technical field of welding, in particular to a fixing mechanism of a welding machine for a diesel engine fuel tank, which comprises a first station, a second station and a third station, the second station and the third station are movably arranged on the rack and are controlled by the first driving structure to move on the rack; the sealing heads are placed on the first station and the third station, the barrel is placed on the second station, the first driving structure controls the second station and the third station to be close to each other and synchronously moves towards the first station till the two ends of the barrel are attached to the sealing heads, and assembling is completed. Therefore, the welding efficiency is ensured.

The invention belongs to the technical field of diesel engine cylinder cover cleaning, and particularly relates to a diesel engine cylinder cover machining cleaning device which comprises a base, an ultrasonic generator is fixed to the left side of the upper portion of the base, a cleaning cavity is fixed to the right side of the ultrasonic generator, and converters are fixed to the front portion and the rear portion of the inner wall of the cleaning cavity. The ultrasonic generator is electrically connected with the converter; a through hole is formed in the bottom of the cleaning cavity, a lifting cavity is fixed in the through hole, a hydraulic plate is slidably connected to the inner wall of the lifting cavity, a hydraulic rod is fixed to the upper portion of the hydraulic plate, a placement plate is fixedly connected to the upper end of the hydraulic rod, the placement plate is located in the cleaning cavity, and the cleaning cavity is filled with a cleaning agent. By means of the device, the problems that when an existing diesel engine cylinder cover is machined and cleaned, the cleaning effect is poor, the efficiency is low, and cylinder covers with different cleaning difficulties cannot be cleaned through one cleaning device are solved.

The invention is suitable for the technical field of press-fitting, and provides press-fitting equipment for a diesel engine cylinder cover and a working method thereof.The press-fitting equipment comprises a workbench, a transferring assembly and a press-fitting assembly, the transferring assembly and the press-fitting assembly are installed at the top of the workbench, and a cylinder cover assembly and a placing assembly are installed at the top of the transferring assembly. In order to solve the problems that in the prior art, a worker needs to use tweezers and other auxiliary tools for alignment, the labor hour consumption is large, the initial placement position of a valve lock sheet is prone to deviation due to the fact that the auxiliary tools leave, and the valve lock sheet needs to be manually adjusted when being ejected out when a valve spring rebounds, the device is provided with an auxiliary mechanism, and the valve lock sheet is pre-filled before press fitting; during press fitting, the auxiliary mechanism moves downwards, the valve rod extrudes the positioning rod to contract, the ring body blocks the valve lock pieces, the valve rod is inserted between the two valve lock pieces, and the protrusion is clamped into the annular groove; the auxiliary mechanism moves upwards, the valve rod pulls the lock plate, finally press fitting is completed through separation, manual errors are reduced, and the situation that the valve lock plate deviates or is brought out due to lubricating oil is avoided.

The invention belongs to the technical field of hybrid power vehicle energy management, and relates to a thermal management energy consumption coupling hybrid power tractor energy optimization method which considers interaction of a thermal management system and a driving system. Comprising the steps of constructing a hybrid tractor system model; establishing a hybrid power tractor power system thermal management cost model; on the basis of an equivalent consumption minimum strategy, under the constraint that boundary conditions are met, the influence of thermal management on performance at high temperature is comprehensively considered, and the operating states of a diesel engine and a motor are reasonably adjusted through optimization, so that equivalent fuel consumption is minimum under multi-objective optimization, and instantaneous optimal diesel engine and battery output power and thermal management power consumption are obtained; and based on the output result of the above steps, the thermal management cooling system and the power system are coupled through a logic interface, and the energy consumption required by battery cooling is transmitted to the cooling equipment.

The invention relates to a diesel engine cooling mechanism which comprises a cooling tower, a heat exchange assembly, a stirring assembly, a limiting assembly and a condenser, the heat exchange assembly, the stirring assembly, the limiting assembly and the condenser are installed in the cooling tower in a matched mode, the stirring assembly is used for stirring cooling liquid in the cooling tower, and the limiting assembly is used for limiting the horizontal relative position of the lower portion of the stirring assembly and a stirring main shaft; the outer wall of the cooling tower is sleeved with a heat exchange assembly, and the heat exchange assembly communicates with the interior of the cooling tower and is used for increasing the path through which the cooling liquid passes in the same space, so that the problem that in the prior art, a stirring mechanism is difficult to stir the cooling liquid with different volume depths is solved; the diesel engine cooling mechanism can adapt to diesel engine cooling mechanisms of various specifications.

The invention discloses an optical storage diesel micro-grid based on analog quantity control and a dynamic load tracking control method. The power grid comprises a photovoltaic power generation unit, a diesel power generation unit, an energy storage cluster, a sampling and signal processing module, an analog quantity control interface module and an energy management system. The energy management system is configured to control the energy storage cluster to perform discharge compensation under the condition that the power change rate is greater than a preset positive threshold value; under the condition that the power change rate is smaller than a preset negative threshold value, the energy storage cluster is controlled to carry out absorption charging; controlling the energy storage unit to correct the output power according to the deviation between the average charge state of the energy storage cluster and the charge state of the energy storage unit; and controlling the diesel power generation unit to stop when the total charge state of the energy storage cluster is greater than the first charge threshold percentage, and controlling the diesel power generation unit to start when the total charge state of the energy storage cluster is less than the second charge threshold percentage. Therefore, power fluctuation quick response, energy storage SOC balance and efficient starting and stopping of the diesel engine are achieved.

The invention discloses a design method of a lightweight offshore booster station diesel generator system, and belongs to the technical field of offshore booster station design. Comprising the steps of determining an island operation mode of the offshore booster station; under the island operation mode of the offshore booster station, calculating the calculated load of a diesel generator in a diesel generator system, the rated capacity of an oil storage tank, the size of a diesel engine room and the size between diesel tanks; calculating the rated power of the diesel generator; determining an arrangement mode between the diesel engine room and the diesel tank; according to the rated capacity of the oil storage tank, the rated power of the diesel generator and the arrangement mode between the diesel engine room and the diesel tank, the design result of the lightweight offshore booster station diesel generator system is obtained. The island operation mode can be determined, the rated power of the diesel generator can be accurately calculated, the capacity of the oil storage tank can be accurately calculated, the size between the diesel engine room and the diesel tank and the equipment arrangement scheme are optimized, and the reliability, economy and space utilization rate of the system are improved.

The invention relates to the technical field of welding, in particular to a welding machine for a diesel engine fuel tank, which comprises a frame, a welding mechanism, a three-dimensional moving mechanism and a fixing mechanism, the three-dimensional moving mechanism and the fixing mechanism are mounted on the frame, and a welding gun of the welding mechanism is fixed on the three-dimensional moving mechanism and can be controlled to move. The fixing mechanism comprises a first station, a second station and a third station, the first station is fixed to a rack, and the second station and the third station are arranged on the rack in a movable mode and controlled by a first driving structure to move on the rack; the sealing heads are placed on the first station and the third station, the barrel is placed on the second station, the first driving structure controls the second station and the third station to be close to each other and synchronously moves towards the first station till the two ends of the barrel are attached to the sealing heads, and assembling is completed. Therefore, the welding efficiency is ensured.

The invention relates to the technical field of diesel engine tail gas treatment, in particular to a mining explosion-proof diesel engine tail gas treatment device which comprises a treatment box body, a tail gas inlet and a tail gas outlet are formed in the two sides of the treatment box body respectively, a splitter plate is arranged in the treatment box body, and a plurality of splitter holes are formed in the splitter plate. According to the device, the entering tail gas is uniformly shunted through the shunting plate, so that the treatment effect of the subsequent purification step is favorably improved. Tail gas often contains impurities such as oil stains and carbon deposition particles, and shunting holes are prone to being blocked after long-time operation. The through mechanism arranged in the device can be automatically started when blockage is detected, the flow dividing hole is physically dredged through the dredging rod, the airflow channel is effectively recovered, the continuity and stability of the tail gas treatment process are guaranteed, the equipment shutdown time caused by blockage is shortened, and the overall operation efficiency is improved.