3059 results about "Dieseling" patented technology

The present invention relates to the technical field of railway locomotive diesel engine adaptive health diagnosis systems, in particular to a railway locomotive diesel engine adaptive health diagnosis system based on human-in-the-loop. The system performs algorithm classification on time sequence signals collected by sensors deployed on a locomotive diesel engine, and comprises four modules a working condition segmentation module, a deduplication detection module, a model training module and an anomaly detection model module, and two steps an offline training process and an online inference process, so as to complete identification and classification of features of anomaly signals, thereby satisfying the requirements of operation and maintenance engineers for health diagnosis and monitoring of health states of subsystems. In addition, the present invention can associate anomaly signals with original sensor data to conveniently check fault reasons, and for faults with various influence factors and unknown reasons, the accuracy of health diagnosis after model construction is completed can be higher. The present invention has the possibility of the health diagnosis model evolving from a fault identification function to a fault classification function, thereby reserving a direction of development for higher requirements of followup intelligent operation and maintenance.

The invention provides a reinforced diesel engine friction pair on-line wear detection device and a wear detection method. The reinforced diesel engine friction pair on-line wear detection device comprises a wear calculation terminal, an NI-PXIe8115 acquisition instrument, a sampling detection circulating oil path, a cylinder pressure sensor, a rotating speed sensor, a vibration sensor, an acoustic emission sensor, a six-in-one lubricating oil physical and chemical sensor, an abrasive particle sensor, an abrasive particle visual sensor and a CAN / USB / RS485 communication interface. The method has the beneficial effects that the load of a friction pair of the strengthened diesel engine is large, the process from symptoms to failure is extremely short, and serious fault events are difficult to control, the device can quickly warn an abnormal state after being implemented, gives a corresponding action instruction to a user, and provides a reliable identification means for strengthening research, development and operation safety of the diesel engine.

The present invention relates to the technical field of railway-locomotive diesel-engine fault diagnosis systems, and particularly relates to a railway-locomotive diesel-engine fault diagnosis system based on a knowledge graph. The system comprises a data collection module, a transmission module, a preprocessing module, an algorithm application module, a storage module and a front-end display module, wherein one end of the data collection module is used for performing signal collection by means of a sensor, and the other end thereof is connected to the preprocessing module by means of the transmission module; the preprocessing module performs diagnosis and positioning on a specific faulty part in combination with a fault classification algorithm of the algorithm application module; and an original signal collected by the data collection module and algorithm diagnosis information are scheduled and stored in the storage module by means of back-end management software, and display interaction materials are then provided for the front-end display module. The present invention retains the previous operation mode of an expert knowledge base in terms of fault diagnosis so as to ensure the basic accuracy of cause analysis, and a neural network intelligent algorithm is introduced to reduce the manual workload and individual difference of people in terms of professionalism.

The invention provides a marine diesel engine shafting longitudinal-torsional coupling vibration calculation method. The method specifically comprises the following steps: S1, calculating crankshaft longitudinal-torsional coupling rigidity; s2, calculating torsional vibration excitation at the propeller by using a CFD method; s3, establishing a ship propulsion shafting coupling free vibration kinetic equation through the calculated longitudinal-torsional coupling stiffness; s4, calculating a longitudinal-torsional coupling inherent frequency and a vibration mode of the ship propulsion shafting through a coupling free vibration kinetic equation of the ship propulsion shafting; and S5, substituting the propeller excitation calculated in the step S2 into the ship propulsion shafting coupling forced vibration kinetic equation to calculate the longitudinal-torsional coupling forced vibration response of the ship propulsion shafting. According to the marine diesel engine shafting longitudinal-torsional coupling vibration calculation method, the crankshaft longitudinal-torsional coupling rigidity is calculated based on a material mechanical deformation energy method, and related exciting force considering the crankshaft longitudinal-torsional coupling effect is obtained by combining related formulas of marine diesel engine shafting dynamics; and finally, ship shafting longitudinal-torsional coupling vibration inherent characteristics and ship shafting longitudinal-torsional coupling forced vibration response are obtained through calculation.

The invention discloses an unmanned platform electromechanical system fault early warning method based on a Transform-BiGRU cross attention mechanism, and belongs to the technical field of fault early warning. The method comprises the following steps: acquiring parameters, and performing time sequence alignment and key feature screening; secondly, designing a parallelization spatio-temporal feature extraction framework: on one hand, capturing a long time sequence dependency relationship through a multi-layer Transform encoder, on the other hand, realizing bidirectional context modeling of a sequence by adopting a bidirectional gating circulation unit, and introducing an interpretable global attention mechanism to perform feature weight dynamic allocation on a BiGRU hidden layer state; and a cross attention feature fusion module is constructed for a Transform and BIGRU fusion problem, and cooperative characterization of a time sequence dynamic feature and a space correlation feature is realized through interactive attention calculation of a spatial-temporal feature tensor. By means of the method, advanced early warning from diesel engine lubricating oil pressure abnormity to whole ship electric power system cascade faults is achieved.

The invention provides a diesel engine misfire fault diagnosis method based on a GRU and a PINN. The diesel engine misfire fault diagnosis method comprises the following steps of diesel engine multi-source data acquisition, data preprocessing and model sample generation; designing a gating circulation unit, introducing a physical constraint embedding module, constructing a misfire fault diagnosis model, and fusing the misfire fault diagnosis model with a long-short term memory model and a physical neural network; performing joint training and optimization on the misfire fault diagnosis model in the step S2 by using the samples in the step S1; and deploying a misfire fault diagnosis model and performing real-time diagnosis. The method has the beneficial effects that the time sequence data-physical model dual-drive diagnosis of the misfire fault of the diesel engine is realized; the accuracy of misfire diagnosis is improved; and the false alarm rate of complex working conditions is effectively reduced.

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 belongs to the technical field of mechanical test tool equipment, and particularly relates to an electro-hydraulic speed regulator test testing device. Comprising the steps that a virtual diesel engine model generates a signal and supplies the signal to a rotating speed controller, an alternating current power supply supplies power to a frequency converter to drive a motor to operate, and the rotating speed of the motor is transmitted to an electro-hydraulic speed regulator through a first coupler to drive a main pump in the electro-hydraulic speed regulator to build pressure; a hydraulic bridge circuit in the electro-hydraulic speed regulator acts to drive the output shaft to rotate, the output shaft transmits an output signal back to the virtual diesel engine model through the flywheel, the magnetic powder brake and the angle sensor, and the virtual diesel engine model feeds back the signal to the magnetic powder brake through the brake controller; and the output torque of the electro-hydraulic speed regulator is ensured to meet the operation requirement and is confirmed by the torque sensor. The electro-hydraulic speed regulator test device has the advantages that the electro-hydraulic speed regulator test device is provided with the outer circulation oil way, and the test requirements of various electro-hydraulic speed regulators can be met.

The invention discloses an intelligent peak regulation method with optimized combination of energy storage and conventional peak regulation means, and the method comprises the following steps: building a holographic situation awareness layer: capturing the voltage, current phase angle and frequency deviation of a power grid, and monitoring the pressure fluctuation in a diesel engine cylinder; data transmission and preprocessing: encrypting data of the miniature phasor measurement unit and the quantum sensor by using a quantum key distribution technology; the self-adaptive decision engine is used for performing Nash equilibrium calculation by utilizing a federal reinforcement learning architecture, through a local Agent based on a power generation / energy storage unit state autonomous optimization control strategy and in combination with a digital twin platform, solving multi-target conflicts of economy, reliability and carbon emission, and generating a global optimal scheduling instruction; the execution control layer is used for tracking resonance points and dispersing harmonic energy spectrums; dynamic topology reconstruction: a harmonic source is positioned by using a digital twin platform, and the topology of the energy storage system is automatically switched according to the harmonic frequency and position; continuously optimizing the digital twin platform; and full-process closed-loop feedback and self-learning are carried out.

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.

The invention discloses a welding tool and method for a lubricating oil pipe of a torsional vibration damper of a low-speed diesel engine, the tool comprises bottom base I-shaped steel, side base I-shaped steel, a side base transverse plate and a bottom base transverse plate, the bottom base I-shaped steel is placed on the ground, the side base I-shaped steel and the bottom base transverse plate are welded on the bottom base I-shaped steel, and the included angle between the side base I-shaped steel and the bottom base transverse plate is 90 degrees; a positioning hole is formed in the upper surface and is used for positioning a lubricating oil pipe flange; the welding method comprises the steps that a flange is pre-connected, a lubricating oil pipe is hoisted to a tool transverse plate datum plane, and a positioning pin locking hole position is inserted; and the included angle between the axes of the left flange and the right flange of the lubricating oil pipe is calibrated to be 90 + / -0.5 degrees, full welding is completed through the TIG segmented welding technology, the deformation is controlled to be smaller than or equal to 0.15 mm, and finally assembly welding of the torsional vibration damper lubricating oil pipe is completed. The positioning device solves the positioning problem of the lubricating oil pipe before welding, error accumulation is avoided, the working efficiency and precision are improved, the sealing performance of lubricating oil pipe parts is guaranteed, and the positioning device has the advantages of being simple in structure, convenient to install, reliable in positioning, high in precision and high in efficiency.

The invention discloses a two-stage optimization method for carbon constraint micro-grid energy management. The method comprises the following steps: establishing power balance constraints of various components in a micro-grid, an economic-low carbon joint objective function, optimization solution of diesel engine power, grid transaction, a load strategy and energy storage scheduling; the system-level CVaR tail risk index is decoupled to a short-time-period CVaR value according to the probability distribution of the system-level CVaR tail risk index and the time window area proportion, and the short-time-period CVaR value serves as a carbon over-quota emission risk constraint boundary and is transmitted to the intra-day level; actually measured wind and light load data are fed back to the prediction model for real-time correction in each period; constructing a robust optimization model to dynamically adjust conservative coefficients; the risk budget is used as a hard constraint, and the expected value of the excess carbon emission condition in the window is calculated in real time; a closed loop is formed. The intra-day rolling optimization provided by the invention is based on an ultra-short-term prediction technology, and the prediction error of the intra-day rolling optimization is only slowly increased in a finite time window, so that the prediction precision at the same time point is obviously superior to that of a day-ahead optimization result.

The invention belongs to the technical field of diesel generating sets, and particularly relates to a low-noise diesel generating set. Comprising a base; the soundproof box is arranged on the base, a fan, a diesel engine and a generator are arranged on the base, the diesel engine is provided with and communicates with an intake manifold and an exhaust pipe, an input shaft of the generator is fixedly connected with a first connecting seat, and the first connecting seat is slidably connected with sliding shells which are evenly distributed; a first spring is arranged between the sliding shell and the first connecting base, an output shaft of the diesel engine is fixedly connected with a second connecting base, the second connecting base is connected with a sliding ring in a sliding mode, and the sliding ring is fixedly connected with evenly-distributed sliding columns. When the rotating speed of the diesel engine exceeds the rated value, connection between the diesel engine and the generator is automatically disconnected, the generator is prevented from being affected by excess power, and therefore the generator is protected against damage, and stable operation of an electrical system is guaranteed.

The invention discloses a high-performance heterogeneously-welded special-shaped combustion chamber piston and a preparation method thereof, a special-basin-shaped combustion chamber and an oil duct structure are directly formed through a rolling process, and heterogeneously-connected between a head part and a skirt part of the piston is realized in combination with a nitrogen protection friction welding technology. The piston head is made of low-silicon high-chromium ferrite-based alloy, the skirt is made of quenched and tempered steel, non-quenched and tempered steel or nodular cast iron, and the welding face is designed to be in a wave shape so as to enhance the bonding strength. The preparation process comprises vacuum smelting, multi-pass rolling, precise welding and surface treatment, the combustion efficiency, the lightweight level and the reliability of the piston are remarkably improved, and the piston is suitable for high-load working conditions such as diesel engines and natural gas engines.

The utility model relates to a periodic modification structure of a reciprocating mechanical transmission gear, which comprises a transmission gear, a non-meshing surface of the transmission gear is modified to form a meshing clearance, and the meshing surface is gapless. The gear backlash on the meshing side of the gear is eliminated to prevent the gear from being knocked in the return stroke due to the alternate change of positive and negative torque, the non-meshing side is shaped to form the backlash to prevent the interference seizure phenomenon in the gear transmission process, and the gear transmission can achieve the states of more stable operation and lower vibration noise after being changed. The transmission gear is especially suitable for transmission gears of piston connecting rod reciprocating motion machines such as Stirling engines and diesel engines.

The invention discloses an armored vehicle diesel engine digital twin model reduction method and system, and the method comprises the steps: building a diesel engine twin model which is a high-dimensional nonlinear system and comprises a thermodynamic equation of a diesel engine; operating the diesel engine twin model under different working conditions, collecting input and output data of variables, and performing standardization processing on the input and output data of the variables to obtain simulation data; a neural network is used for constructing a nerve differential equation model, simulation data is used for training the nerve differential equation model to obtain a reduced-order model, and the output of the diesel engine is predicted based on the obtained reduced-order model. Through Simulink modeling, neural network training, incremental learning and real-time data updating, a dynamic model of the diesel engine is effectively simplified, and it is ensured that high-precision prediction capacity is kept under different working conditions and operation environments. The system architecture supports real-time monitoring, online learning and self-adaptive adjustment, and high efficiency and stability of the diesel engine control system in practical application are guaranteed.

The invention discloses a diesel engine connecting rod structure parameter optimization method which specifically comprises the following steps: (1) obtaining load values, weights and stress values which can be borne by an oil extraction machine connecting rod under different connecting rod body structure parameters through finite element analysis, and taking the load values, the weights and the stress values as samples; (2) completing the training of a Kriging agent model based on the constructed sample; and (3) searching an optimal connecting rod body structure parameter in a feasible space based on a particle swarm algorithm by taking the connecting rod body structure parameter as a position code, taking a maximum load value which can be borne by the connecting rod and a lightweight design requirement as constraint conditions and taking a minimum stress value as a target function. The trained Kriging proxy model is used for stress values, bearable load values and weight corresponding to connecting rod body structure parameters of all position codes in the particle swarm algorithm, and then the maximum load value is found quickly, and the connecting rod body structure parameters corresponding to the minimum stress value are found under the lightweight design requirement.

The invention relates to a diesel engine oil pan engine oil supply device and method, and relates to the technical field of diesel engines, the device comprises a filter element rotationally arranged in an oil pool body at one end of the bottom of an oil pan, a first driving mechanism is arranged above the filter element, and the first driving mechanism is used for driving the filter element to rotate through rotation of a crankshaft in an upper crankcase; purifying the engine oil through centrifugal separation; the device further comprises an oil supply pipe, one end of the oil supply pipe extends to the position below the filter element, the other end of the oil supply pipe extends to the crankshaft, and an oil supply pump used for conveying purified engine oil into the lubricating system is arranged on the oil supply pipe. The device further comprises a particle storage ring sleeving the upper part of the filter element. According to the oil supply device, the functions of lubricating additive particle storage, discharging, adding and the like are integrated in the oil pan and are tightly combined with the engine oil purification function, an efficient oil supply system is formed, the working efficiency and reliability of the whole lubricating system are improved, and the lubricating performance of engine oil can be greatly improved by adding the lubricating additive particles.

The present invention discloses a Beidou positioning self-loading and unloading lifting walking platform high-efficiency diesel generator set, which relates to the field of generator technology, including a bottom plate and a top plate, a lifting adjustment mechanism is provided between the bottom plate and the top plate, the lifting adjustment mechanism is used to adjust the height of the top plate, and a diesel engine and a generator are installed on the top of the top plate. The present invention sets the diesel storage tank on the bottom plate, which greatly reduces the overall center of gravity of the equipment compared to placing all diesel on the top plate, reduces the diesel load on the top plate, reduces the workload of the lifting adjustment mechanism, and improves the operating efficiency of the equipment; a transfer storage tank is installed on the top plate, which maintains the same height as the diesel engine. The diesel storage tank first temporarily supplies diesel to the transfer storage tank, and then the transfer storage tank supplies oil to the diesel engine, ensuring a stable supply of diesel, thereby ensuring continuous and stable power generation of the generator, and avoiding the problem of unstable power supply due to changes in oil supply pressure.

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.

The invention particularly relates to an integrated simulation test system and method for a diesel engine speed regulation system, and belongs to the field of diesel engine speed regulation system testing. The system comprises a diesel engine analogue simulation module which is used for simulating and outputting the working mode of a diesel engine, responding to and entering an off-line test working mode or an on-line monitoring working mode, and providing off-line test working parameters or on-line monitoring working parameters for a diesel engine speed regulation system; and the diesel engine speed regulation system analog simulation test module is used for responding to enter an off-line test working mode or an on-line monitoring working mode and acquiring off-line test working state parameters or on-line monitoring working state parameters of the diesel engine speed regulation system in real time. According to the method, the simulation test of the diesel engine speed regulation system is carried out by using the device. The off-line test function verification of the diesel engine speed regulation system is realized, the function verification cost and risk of the diesel engine speed regulation system are reduced, the comprehensive test of the diesel engine speed regulation system is realized, and the usability and reliability of the functions of the diesel engine speed regulation system are improved.

The invention discloses a diesel engine global working condition self-adaptive power control method which comprises the following steps: S1, acquiring multi-source heterogeneous signals including a hydraulic pressure pulsation signal, a spatial position signal and a multi-way valve opening gradient signal; s2, constructing a spatial-temporal feature fusion model based on the multi-source heterogeneous signal; and S3, identifying a working condition intention through the spatial-temporal feature fusion model. The method has the advantages that the torque response speed is high, the power interruption risk is reduced, and the torque loss compensation rate under the high-altitude working condition is high.

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.

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 relates to a reliability test method and device for an emergency diesel engine of a nuclear power plant and a storage medium, and the test method comprises the following steps: obtaining the operation condition information of the emergency diesel engine, and obtaining the estimated total use time of parts of a connecting rod power assembly of the emergency diesel engine based on the operation condition information; structural information of a connecting rod power assembly of the emergency diesel engine is obtained, a dynamic calculation model of the connecting rod power assembly is constructed based on the structural information and the operation condition information, and the dynamic calculation model is used for simulating operation of the connecting rod power assembly in preset time; obtaining a wear coefficient of the part, and inputting the wear coefficient and the estimated total use duration into the dynamic calculation model to obtain the part wear loss of the connecting rod power assembly and the maximum wear loss of the cylinder sleeve; and determining the reliability of the emergency diesel engine according to the part abrasion loss and the maximum abrasion loss of the cylinder sleeve. The test method can guarantee reliable operation of the emergency diesel engine.

The invention discloses a bevel angle transmission marine gear transmission device, which relates to the technical field of gear transmission, and comprises a box body, an input component, a transmission component and an output component, an ahead running transmission gear is fixed to an input shaft of the input component, and an ahead running driving gear with a clutch and a piston is installed on the input shaft in an empty sleeving mode. And a reversing transmission gear is fixed on a transmission shaft of the transmission part. The invention belongs to the breakthrough of the prior art, and can meet the requirements of inclination of an input shaft, a reversing shaft and an output shaft of a gear box by utilizing the displacement principle of gears with different center distances and the meshing transmission principle of crossed shaft gears. Gears on the three shafts can be mutually meshed and effectively work, the requirement that the high-speed boat inclines relative to the water surface when advancing on the water at a high speed is met, the diesel engine and the gear box are horizontally arranged in the cabin, the output shaft of the gear box outputs at a certain oblique angle, the structure is reliable, the process is easy to implement, and the high-speed boat has the advantages of being reasonable and compact in structural arrangement, high in transmission efficiency, low in cost and the like. And the weight is light.

The utility model relates to the field of ship maintenance, in particular to a marine diesel engine crankshaft thrust disc machining device which comprises a crankshaft body, a mounting frame, a movable frame and a milling head, a fixing frame is arranged above the crankshaft body, the mounting frame is fixed to the lower end of the fixing frame, a rotating ring is fixed to the interior of the mounting frame, and the milling head is fixed to the lower end of the mounting frame. The rotating ring is rotationally connected with a main shaft of the crankshaft body, a height-adjustable moving frame is arranged on one side of the mounting frame, and a position-adjustable milling head is arranged at the lower end of the moving frame. According to the device, the surface of the crankshaft thrust disc can be quickly and conveniently milled by conveniently adjusting the positions of the X axis and the Z axis of the milling head, and the problems that an existing machining device for the crankshaft thrust disc of the marine diesel engine is short of an effective and convenient surface quick machining function, and consequently the machining device needs to be disassembled when being maintained; and a lot of time is wasted and loss can not be repaid.

The invention discloses a continuous passing type quenching conveying device for diesel engine camshafts in the technical field of diesel engine camshaft machining. The quenching conveying device comprises a first conveying mechanism, a plurality of camshaft fixing mechanisms and a plurality of quenching mechanisms, wherein the camshaft fixing mechanisms and the quenching mechanisms are arranged on the first conveying mechanism. Wherein the quenching mechanism comprises a bearing frame connected with the first conveying mechanism, a driving device arranged on the bearing frame and a split type induction coil connected with the driving device, and the split type induction coil comprises two sets of symmetrically-arranged arc-shaped coils and a driving part used for driving the two arc-shaped coils to move face to face or back to back. According to the quenching mechanism, the split type induction coil is driven by the driving equipment to move in the axial direction of the diesel engine camshaft main body for quenching work, the diesel engine camshaft main body does not need to be repeatedly clamped, transferred and reset, the quenching treatment work efficiency of the diesel engine camshaft main body is greatly improved, and the production efficiency is improved.

The invention discloses an efficient diesel generating set, and belongs to the technical field of diesel generating sets. Comprising a rack, a diesel engine and a generator are fixedly connected to the rack, a rotor of the generator is fixedly connected with a power shell, the power shell is rotationally connected with a transfer shell, the transfer shell is fixedly connected with a bearing shell, a crankshaft of the diesel engine is fixedly connected with the bearing shell, and an embedding unit used for guaranteeing transmission safety is arranged on the power shell; the embedding unit comprises first embedding pieces which are distributed in a circumferential array mode, the first embedding pieces which are distributed in the circumferential array mode are fixedly connected to the power shell, and second embedding pieces which are distributed in the circumferential array mode are slidably connected to the transfer shell. According to the invention, through the cooperation of the first embedding piece and the second embedding piece, when the crankshaft or the rotor is suddenly blocked, the power connection between the crankshaft of the diesel engine and the generator is completely disconnected, so that irreversible damage to the crankshaft or the rotor caused by the blocking condition is prevented.

The present invention provides an energy-storage emergency power supply and driving control method and apparatus for a mine induction motor hoist. The method comprises: acquiring working states of a mains power loop 1 and a mains power loop 2 in real time; on the basis of abnormal working states of the mains power loop 1 and the mains power loop 2, determining whether to disable a mains power supply mode and enable an emergency power supply mode; enabling the emergency power supply mode, and switching the hoist from mains power supply to emergency power supply; starting hoist auxiliary units and a hoist electric control unit, and determining whether the hoist meets an operation condition; receiving a hoist operation instruction, and on the basis of the operation instruction, controlling the hoist to operate; and exiting an emergency working mode, and switching the hoist from the emergency power supply to the mains power supply. The present invention uses a combination of new energy storage and conversion to replace the original diesel engine power generation system, solving the problem of emergency power supply of a control system for a mine induction motor elevator, allowing for rapid establishment of an emergency rescue hoisting channel, and providing a safety guarantee for mine workers and production.