1428 results about "Kinetic energy" patented technology

The invention discloses a bed load particle starting test method and device, and relates to the technical field of hydromechanics, the method comprises the following steps: laying sediment particles in a wave water tank, and adjusting the water flow rate through flow control until the bed surface shear stress is less than the critical shear stress; tracer particles are excited to emit fluorescence through a laser beam, and a camera array is used for synchronously collecting instantaneous flow velocity of a flow field and displacement data of sediment particles; analyzing spatial and temporal distribution characteristics of turbulence energy dissipation and pressure energy dissipation based on a turbulence burst process, and establishing a sediment particle starting mathematical model; experimental data and computational fluid mechanics numerical simulation are combined, and the mathematical model is verified and optimized. According to the technical scheme, the analysis precision and the experimental convergence speed of the sediment starting criterion under the complex hydrodynamic force condition can be remarkably improved, and full-chain efficient cooperation from micromechanical response to macroscopic engineering application is achieved.

This invention introduces a kinetic energy recovery wind-wave integrated system for offshore wind power generation. The system consists of a semi-submersible platform equipped with a fan and an internal wave energy device. The device includes a shell housing a Power Take-Off (PTO) system, featuring a permanent magnet synchronous linear motor and an active controller. The motor's stator is fixed inside the shell, while its mover is connected to a counterweight block outside the stator, linked to the shell's top via a spring. Limiters are installed at both ends of the shell to restrict the counterweight block's movement. This system utilizes the wave energy device to absorb kinetic energy, which otherwise affects wind turbine stability, and converts it into usable electrical energy via the PTO system. This enhances the stability and safety of offshore wind turbine power generation.

The invention relates to the technical field of automobile brake control, in particular to a self-adaptive brake kinetic energy recovery control method and system based on multi-sensor fusion. Tire wear and road surface feature data are collected through a multi-source sensing fusion unit, and a tire wear coefficient and a road surface friction coefficient are generated through an intelligent decision calculation unit; the method comprises the following steps of: integrating the nonlinear correlation of the multi-source sensing fusion unit and the self-adaptive control execution unit through a rule and data fusion algorithm, outputting a comprehensive friction coefficient, and dynamically adjusting the braking kinetic energy recovery force and response time by the self-adaptive control execution unit according to the comprehensive friction coefficient. The system comprises a multi-source sensing fusion unit, an intelligent decision calculation unit, the self-adaptive control execution unit and a closed-loop feedback calibration unit. The closed-loop unit corrects data deviation through cross validation of the laser radar and the motor torque inversion model, the problems of poor working condition adaptation and unreliable data are solved, and the kinetic energy recovery efficiency, the braking safety and the driving smoothness are improved.

The invention provides a torque control method, a vehicle and a computer readable storage medium. The torque control method comprises the steps that whether the vehicle is in a ramp running condition or not is judged; if yes, obtaining a target torque adjustment coefficient of each wheel of the vehicle and the maximum available torque of each wheel; obtaining a target output torque corresponding to each wheel according to the maximum available torque of each wheel and the target torque adjustment coefficient of each wheel; and distributing torque to the corresponding wheels according to the target output torque of each wheel. According to the method, the slip rate of each wheel of the vehicle is changed within an acceptable range, accurate control over the slip rate of each wheel of the vehicle is achieved, the problem that the stability of vehicle operation is affected due to large fluctuation of the slip rate is solved, the vehicle operation stability is enhanced, each wheel is kept at the target output torque, and the service life of the vehicle is prolonged. Therefore, vehicle kinetic energy waste is effectively reduced, and the endurance mileage of the vehicle is increased.

The invention provides an active-disturbance-rejection full-wind-speed power smoothing method based on kinetic energy of a fan rotor, and belongs to the technical field of wind power control. The technical problem that the output power of a traditional wind turbine generator is unstable due to random fluctuation of the wind speed is solved. According to the technical scheme, the method comprises the following steps that S1, rotor kinetic energy is calculated based on a wind turbine kinetic model, and the effect of the rotor kinetic energy in power fluctuation stabilization is analyzed; s2, designing a first-order linear active disturbance rejection controller for rotating speed loop control; s3, designing a second-order linear active disturbance rejection controller for variable pitch control; and S4, dynamically generating an active power reference value by combining the kinetic energy of the rotor and an active disturbance rejection control technology, and controlling by coordinating a rotating speed ring and a variable pitch. The method has the beneficial effects that power fluctuation can be remarkably reduced under wind speed fluctuation and complex working conditions, the smoothness of power output is improved, meanwhile, the anti-interference capability and the dynamic stability of the system are enhanced, and efficient and stable operation of the wind driven generator system is ensured.

The invention discloses an underwater glider attitude control method and system, and belongs to the technical field of AUVs, and the control method comprises the steps: S1, building a kinetic model based on a coordinate transformation relation, a Newton-Euler equation and a kinetic energy theorem; s2, on the basis of the dynamic model, a preset performance controller is designed through a backstepping method, and high-precision control over the pitching motion of the underwater glider is achieved.The underwater glider dynamic model with the three degrees of freedom is established, the particularity of the pitching motion of the underwater glider is considered, a periodic performance function is introduced, and the performance of the underwater glider is improved. A self-adaptive preset performance controller is designed for the body speed and the pitch angle of the underwater glider, the dynamic performance and the steady-state performance of the underwater glider in the angle switching process are considered, and the posture and the speed of the underwater glider are controlled within a preset range.

The invention discloses a multi-factor coupling action slope dangerous rock mass instability starting speed determination method which comprises the following steps: establishing a dangerous rock mass generalization mechanical model, simplifying a dangerous rock mass main control structural plane into two parts, namely a through section and a non-through main control structural plane, and controlling dangerous rock mass instability damage by a rock mass corresponding to the dangerous rock mass main control structural plane; carrying out stress analysis on the dangerous rock mass and the locking section rock mass based on the external load effect and the generalized mechanical model of the dangerous rock mass; the external load effect comprises horizontal and vertical earthquake force, frost heaving force, fracture water pressure or excess pore water pressure; determining elastic strain energy released by potential energy reduction in crack propagation of the main control structural plane of the dangerous rock mass based on a multi-factor coupling effect; and on the basis of the assumption that elastic strain energy released by reduction of potential energy in crack propagation of the main control structural plane of the dangerous rock mass is instantaneously released and converted into kinetic energy of dangerous rock mass movement, the instability starting speed of slope dangerous rock mass severe movement under the multi-factor coupling effect is determined. The invention further discloses a system, electronic equipment and a computer readable storage medium.

The invention discloses an automobile transmission shaft with a kinetic energy recovery function, and relates to the technical field of vehicle transmission. The problem of torque transmission vibration energy recovery is solved. The driving shaft is in transmission connection with a vehicle driving source, the driven shaft is in transmission connection with a vehicle driving wheel, the transition shaft is used for being in transmission connection with the driving shaft and the driven shaft, and the energy recovery part is fixed to a vehicle body. The opposite sides of the driving shaft and the transition shaft are each provided with a set of pawls. The driving shaft and the transition shaft are arranged, the driving shaft and the transition shaft are meshed and matched through the pawls, meanwhile, energy conversion is conducted through piezoelectric ceramics, so that second-order vibration energy in the forklift driving or forklift driving process can be absorbed and converted, energy recovery is achieved, meanwhile, a rubber cushion block is arranged, on one hand, vibration buffering can be conducted to a certain degree, and on the other hand, the energy recovery efficiency is improved. And on the other hand, the piezoelectric ceramics can be prevented from being damaged when being driven by a relatively large torque.

The invention provides a brake lamp control strategy for deceleration caused by kinetic energy recovery of a new energy vehicle. The brake lamp control strategy comprises a microcontroller (MCU), a vehicle speed sensor and a brake lamp control system. The MCU collects speed data in real time, calculates deceleration and judges whether a brake lamp is turned on or not. When the deceleration is larger than or equal to 0.1 G and the duration is larger than or equal to 0.5 second, the brake lamp is turned on; the brightness is 50% when the deceleration is less than or equal to 0.2 G, and the brightness is 100% when the deceleration is greater than 0.2 G. The brightness of the brake lamp can be dynamically controlled without stepping on a brake pedal, a rear vehicle is reminded in time, and the risk of rear-end collision accidents is reduced. The system is simple in structure, low in cost and suitable for the new energy automobile, and the driving safety and adaptability are improved.

The invention discloses a hydraulic machine with a safety protection function, and relates to the technical field of hydraulic machines. Auxiliary stand columns are installed on the periphery of the outer surface of the supporting column set, springs are arranged on the outer surfaces of the auxiliary stand columns in a sleeving mode, fixing blocks and four-column frame assemblies are fixedly connected to the outer surfaces of the bottoms of the supporting columns, when the supporting columns operate downwards to apply pressure, a protection plate can slide downwards rapidly, and the outer surface of the protection plate is protected by irregular rubber bodies; when the supporting columns are extruded, scattered small parts can absorb kinetic energy through the irregular colloid on the outer surface of the protection plate, and the service life of the protection plate is effectively prolonged. The working table and the control table are arranged at the bottom of the supporting column assembly, the working table and the control table are integrated and detachable, and space is effectively saved. The safety of operators and a machine is guaranteed through the guard plate, the irregular rubber body and the brake when the hydraulic machine works, and normal operation of the hydraulic machine is guaranteed.

The invention relates to the technical field of geological surveying and mapping, and discloses urban three-dimensional geological surveying and mapping equipment which comprises a placement table, three supporting legs are rotatably connected to the inner wall of the placement table, air pressure sleeves are arranged at the bottoms of the three supporting legs, and fixing rings are fixedly connected to the inner walls of the air pressure sleeves. An operator supports the surveying instrument through the supporting assembly, then rotates the air pressure sleeve to enable the air pressure sleeve to be perpendicular to the ground, finally places the extrusion assembly to descend, enables the piston rod to make contact with the ground, enables the piston rod to extrude air in the air pressure sleeve and enables the air pressure to be increased, and generated ground vibration can be transmitted to the piston rod when the surveying instrument conducts surveying around a large number of vehicles. Kinetic energy is absorbed and vibration is relieved through compressibility of high-pressure gas at the top of the piston rod, so that vibration borne by the surveying instrument is reduced, and frequent vibration of the surveying instrument and influence on surveying and mapping accuracy when the surveying instrument is used for surveying and mapping in an area with many running vehicles are effectively prevented.

The present invention relates to a manipulator control device and a robot based on kinetic energy recovery. The manipulator control device includes a motor, a motor drive module, a controller and an energy storage device; the motor drive module is connected to a power source, and controls the rotation of the motor through a control signal sent by the controller; the energy storage device is connected to the motor drive module, and receives the reverse current transmitted from the motor through the motor drive module and stores electric energy when the motor decelerates; and / or releases the stored electric energy to output a discharge current when the motor accelerates, and the discharge current is transmitted to the motor through the motor drive module. The manipulator control device based on kinetic energy recovery of the present invention, by providing an energy storage device, stores energy when the motor decelerates and releases energy when the motor accelerates, which can not only reduce the heating of the motor and improve the safety of equipment operation, but also save energy and reduce costs.

The invention discloses a control method of a hybrid power system, the hybrid power system and a hybrid excavator. The control method of the hybrid power system comprises the steps that the required power of a hydraulic system, the required power of an electrically-driven rotation system and the current electric quantity of an energy storage module are obtained; the total demand power of the system is calculated according to the demand power of the hydraulic system and the demand power of the electric drive rotation system; determining the working mode of the hybrid power system according to the size relation between the total demand power and a first preset value and the size relation between the current electric quantity of the energy storage module and an electric quantity limit value; when the hybrid power system is in the heavy load mode, the generator motor is controlled to provide power for the hydraulic system; and when the hybrid power system is in the light load mode, the generator motor is controlled to convert part of kinetic energy generated by the engine into electric energy to charge the energy storage module. The system reliability can be enhanced, energy consumption and emission are reduced, and efficient utilization of energy is achieved.

The invention discloses an anti-folding brake control method for a new energy tractor and a trailer, and belongs to the technical field of new energy vehicle braking. The method specifically comprises the steps that when braking is light braking, a tractor only starts electric braking, and a trailer starts slight air braking; when the braking is heavier braking, except for starting electric braking, all pneumatic brakes of the tractor provide corresponding braking air pressure according to calibration parameters, and the trailer provides corresponding pneumatic braking air pressure according to loads; when the braking is emergency braking, different braking air pressures are provided for each pneumatic brake of the tractor and the trailer according to pre-calibrated parameters, and then automatic adjustment is carried out according to wheel speed signals of all vehicles and signals fed back by a vehicle body stabilizing system. The braking force redistribution method is simple and is not limited by whether the trailer is provided with a power battery or not, the braking stability of the vehicle can be guaranteed, the kinetic energy of the vehicle can be recycled to the maximum extent, and the economical efficiency of the vehicle is improved.

The invention relates to the technical field of generator exhaust, and discloses a generator outlet exhaust pipe structure which comprises a connector and a vertical exhaust pipe, the bottom end of the connector is directly connected with the air outlet end of a generator, and the connector and the vertical exhaust pipe are connected through a metal bellow expansion joint. A vibration reduction component is arranged on the outer wall of the vertical exhaust pipe, and a temperature control component is arranged in the vertical exhaust pipe; the vibration reduction component comprises a fixed frame and a sliding frame, the fixed frame is connected with a wall and other fixed structures, thick springs and thin springs are used for forming a composite vibration reduction spring structure, and when the vertical exhaust pipe is subjected to low-frequency vibration, the displacement of the exhaust pipe is small, and at the moment, only the thin springs deform; when the vibration frequency rises and the displacement amount is too large, the thick spring starts to be connected with the thin spring in parallel for bearing, the variable stiffness characteristic is formed, the good vibration reduction effect is achieved, and meanwhile the damper works to absorb kinetic energy of vibration.

The invention belongs to the technical field of forging and pressing tools, and particularly relates to an automobile part forging and pressing tool which comprises a self-adaptive lifting mechanism, an energy storage type turnover mechanism, a self-resetting one-way liquid supply mechanism and a forging and pressing mechanism, the forging and pressing mechanism comprises a forging and pressing base, a forging and pressing hydraulic cylinder and a forging and pressing hammer head, and the forging and pressing hydraulic cylinder is arranged on an external rack. In order to realize driving of intermittent rotating motion by continuous reciprocating motion, on one hand, motion conversion is performed through a gear and a rack, and on the other hand, kinetic energy is stored and released through an energy storage torsion spring, so that the technical effects of kinetic energy accumulation during locking and rapid driving after unlocking are realized; in addition, in order to achieve automatic control over the hydraulic flowing direction, the invention further creatively provides a valve replacing assembly, and the liquid flowing direction is automatically controlled through longitudinal sliding of the lifting type sleeve.

The invention relates to the technical field of robots, in particular to a multi-angle adjustable high-speed manipulator which comprises a robot body mounted on a track, the robot body comprises a rack, a rotating base fixed to the lower surface of the rack and a manipulator fixed to the rotating base, and a walking structure attached to the track is arranged on the rack; a cleaning module for cleaning the track is arranged on the walking structure, and the cleaning module is composed of a mounting plate, a dust collection mechanism detachably mounted on the bottom side of the mounting plate, a knocking mechanism fixed to the left side and the right side of the mounting plate and an elastic pushing structure; and the elastic pushing structure deforms to drive the knocking mechanism to work, so that the knocking mechanism cleans stubborn impurities on the track. Multiple cleaning of the track is achieved through the cleaning module, movement kinetic energy of the mechanical arm is converted into cleaning action through linkage of the elastic pushing structure and the knocking mechanism, and comprehensive maintenance is completed in cooperation with a dust collection and lubricating system.

The utility model discloses a special tool clamp device for a full-automatic metal Charpy impact sample, which relates to the technical field of material detection, and is characterized in that when the special tool clamp device is used, the sample is placed on the upper surface of a sliding seat and is attached to the surfaces of two bosses of a countermeasure seat, and when a pendulum bob impacts, the sample is broken, so that the sample is not damaged. The residual kinetic energy of the pendulum bob impacts the surface of the buffer pad, meanwhile, the force unloading seat slides in the groove, the force unloading seat presses the first piston through the jacking column, the first piston presses liquid in the piston cylinder into the secondary energy absorption chamber through the bent pipe, and the second piston is driven to press the spring, so that the spring greatly buffers the instant impact force, and the impact force is reduced. Meanwhile, the hydraulic cylinder slides on one side of the frame plate during impact, so that the length of the tension spring pulled by the hydraulic cylinder is changed, kinetic energy of the pendulum bob can be absorbed, direct hard contact is avoided, large impact force can be absorbed and buffered through the structure, meanwhile, it can be guaranteed that the whole is not affected by impact, and good sample positioning precision is guaranteed.

The invention provides an energy recovery control method and device based on electro-hydraulic distribution, equipment and a medium, and relates to the technical field of vehicle control, and the method comprises the steps that when a vehicle meets the sliding energy recovery condition, the sliding recovery torque of the vehicle is obtained; when the vehicle meets the braking energy recovery condition, the braking torque and the torque recovery limit value of the vehicle are obtained; according to the first comparison result of the braking torque of the vehicle and the torque recovery limit value, the electric braking recovery torque and the hydraulic braking force are determined; actual hydraulic braking force of the vehicle is obtained; according to a second comparison result of the hydraulic braking force and the actual hydraulic braking force, the state of a braking controller and an electric braking compensation value are determined; and superposing the sliding recovery torque, the electric braking recovery torque and the electric braking compensation value as a target recovery request torque for energy recovery. According to the technical scheme, the braking relation between electric braking and hydraulic braking can be flexibly processed, braking safety is guaranteed, and the recovery rate of braking energy is increased.

The invention provides an electric drive control system and method for a new energy special vehicle, and relates to the technical field of vehicles. According to the method, current driving information, historical driving information and historical energy recovery information of a target vehicle are obtained, whether the driving front of the target vehicle is a downhill road section or not is determined according to the current position and the current driving path; and when the driving front of the target vehicle is the downhill road section, the current kinetic energy recovery level is determined according to the historical kinetic energy recovery level and the historical vehicle speed corresponding to the target downhill road section. As the new energy special vehicle generally works back and forth in a fixed path, the historical kinetic energy recovery level can be adjusted according to the historical kinetic energy recovery level and the historical vehicle speed to obtain the current kinetic energy recovery level, and the current kinetic energy recovery level is obtained by combining historical information. The accuracy of the kinetic energy recovery level during driving of the new energy special vehicle can be improved, shortening of the service life of a battery caused by frequent braking is avoided, and the effect of prolonging the service life of the battery is achieved.

The invention belongs to the technical field of buffers, and particularly relates to a mandrel type and piston type liquid-gas buffer which overcomes the conventional technical prejudice of technicians in the field (generally research and development are carried out in the direction of improving the machining precision of a conical structure), and a conical column structure is improved into an equal-diameter cylindrical structure. The diameter of the cylindrical structure is equal to that of an inner hole in the core shaft seat, a plurality of damping grooves are formed in the shaft rod, and the groove structure is gradually sparse. On one hand, the machining difficulty of the cylindrical structure with the equal diameter and the requirement for the machining precision are greatly reduced, the cost is relatively reduced, in addition, the cylindrical structure and the inner hole in the mandrel base are equal in diameter, the damping grooves are formed in the surface of the mandrel body, the buffering performance is better, the damping groove structure serves as an oil channel, buffering force can be evenly distributed, and the service life of the mandrel is prolonged. And when an impactor with larger kinetic energy impacts, the condition that the mandrel is stuck on the mandrel seat is avoided.

The present invention discloses a laser cutting route planning and control method and system in the field of emergency rescue, the method comprising: S1: preset laser cutting motion parameters; S2: based on the preset laser cutting motion parameters, construct the dynamic equation of laser cutting; S3: based on the constraints of laser cutting and the principle of minimum kinetic energy of the cutting head, construct the objective function of laser cutting; S4: using a particle swarm algorithm to optimize the objective function to obtain the optimal position, optimal speed and optimal rotation speed of laser cutting; S5: using a positioning sensor to obtain the real position of laser cutting, and adjusting the driving force and rotational force of the cutting head according to the deviation between the real position of laser cutting and the optimal position. The present invention combines the constraints of laser cutting and the principle of minimum kinetic energy of the cutting head to construct the laser cutting objective function, obtain the optimal cutting route through optimization and solve, calculate the cutting deviation in real time, adjust the driving force and rotational force of the cutting head, and realize real-time control of laser cutting.

The invention provides an automatic injection pen capable of slowing down injection speed, which comprises a shell, the shell is arranged along a longitudinal axis and is provided with a near end and a far end, a cavity for accommodating an injector is arranged in the shell, the injector comprises an injector body and a piston arranged in the injector body, and the piston is arranged in the cavity. An injection mechanism is arranged in a far-body-end containing cavity of the shell and comprises an injection push rod arranged at the bottom of the injector body in a sleeving mode and a driving mechanism driving the injection push rod to move axially, and a preset distance L is kept between the initial position of the injection push rod and a piston. The driving mechanism applies driving force to the injection push rod to enable the injection push rod to move in an accelerated mode and accumulate kinetic energy, the injection push rod breaks through static friction resistance when making contact with the piston by means of the kinetic energy, and injection can be completed as long as the driving force is larger than the dynamic friction resistance of the piston in the follow-up pushing process.

The diaphragm pump comprises a pump head, the pump head is provided with a liquid inlet, a liquid outlet, a liquid inlet cavity communicating with the liquid inlet, a liquid outlet cavity communicating with the liquid outlet and an extrusion cavity communicating with the liquid inlet cavity and the liquid outlet cavity, and the diaphragm pump further comprises a rolling turbulent flow piece arranged in the liquid inlet cavity and / or the liquid outlet cavity. The rolling turbulent flow piece can roll in the liquid inlet cavity and / or the liquid outlet cavity under the impact of water flow, and turbulent flow is conducted on the water flow; the utility model further discloses a water purifier which comprises the diaphragm pump. Through the arrangement of the rolling spoiler, when water flow moving at a high speed makes contact with and collides with the rolling spoiler, kinetic energy of water flow is converted into motion kinetic energy of the rolling spoiler, so that fluid with a slow flow speed does not cause large vibration of the cavity wall when the fluid collides with the cavity wall; meanwhile, friction noise generated when the water flow flows through the cavity wall is correspondingly reduced, and an excellent water flow noise reduction effect is achieved in a high-flow-speed machine according to the technical scheme.

A drive mechanism for use with an electric motor and a clutch mechanism includes a rotor shaft, a disconnect shaft, a disconnect mechanism, at least one damper element, and a part of a clutch. The rotor shaft and disconnect shaft have a longitudinal axis A. The disconnect shaft transmits torque between the rotor shaft and the clutch mechanism. The disconnect shaft comprises the part of the clutch and a shaft element. The disconnect mechanism is configured to move the disconnect shaft between an engaged position in which the part of the clutch is engaged with the clutch mechanism and a disengaged position in which the part of the clutch is not engaged with the clutch mechanism. The at least one damper element is configured to absorb at least part of any kinetic energy introduced into the disconnect shaft due to movement of the disconnect shaft.

The invention discloses a running power calculation method and device, and the method comprises the steps: obtaining the physiological information and position information of a user, the acceleration data and heart rate data of a running state, and obtaining the weather information of a current moment; gait information is extracted according to the acceleration data, and amplitude output power is obtained through physiological information and the gait information; kinetic energy output power, gravity-overcoming output power and wind resistance-overcoming output power are calculated in combination with the position information and the weather information; summing the amplitude output power, the kinetic energy output power, the gravity overcoming output power and the wind resistance overcoming output power to obtain the running power of the user. According to the method, the running power is calculated by using equipment with lower cost, and the method has good universality. Meanwhile, according to the positive correlation relation between the heart rate and the power, under the condition that the position information cannot be obtained, the output value of the power driving model is corrected according to the change characteristics of the heart rate, and the reliability of the output power is ensured.

The present invention discloses a globe valve applicable to low-temperature media, belonging to the technical field of valves. It is a structural improvement of the globe valve for transporting low-temperature media. Refrigerant is filled in the shock-absorbing cavity corresponding to the liquid inlet of the valve body by the valve seat and inside the valve seat to keep the pressure and temperature of the liquid inlet of the valve body relatively stable, and to avoid the deformation and generation of gaps in the sealing surfaces of the valve core and valve seat due to excessive temperature changes. After the valve is started, the valve core moves upward to maintain the normal opening degree, and the telescopic buffer structure and turbine blades arranged at the upper and lower ends of the valve core are relied on to reduce the strong pressure caused by the instantaneous hydraulic pressure on the valve core. Among them, relying on the reverse air compression effect of the telescopic air distribution sleeve rod, the turbine blade moves downward. When the opening degree of the valve core is the largest, the turbine blade is close to the valve seat, and the turbine blade is driven by the low-temperature medium to rotate, thereby consuming part of the kinetic energy in the medium, and reducing the impact force of the high-speed fluid medium on the valve core and the outlet pipe fitting by passive flow limiting.

The invention discloses a temperature field obtaining method of a transformer winding and related equipment, and relates to the field of simulation, and the method comprises the steps: calculating the current fluid flow velocity of a fluid in a three-dimensional simulation model after the fluid is affected by the temperature according to the current temperature field of the three-dimensional simulation model; determining the current kinetic energy and the kinetic energy dissipation rate of the fluid according to the current fluid flow velocity, and then determining the current temperature of the fluid and the current temperature of the transformer winding model in contact with the fluid; according to the temperature difference, the current heat flux is calculated to determine the current heat dissipating capacity; updating the current temperature field according to the current heat dissipating capacity; if the updated current temperature field and the current temperature field have a temperature difference value between at least one grid node at the same position, which is not smaller than a set threshold value, taking the updated current temperature field as the current temperature field, and recalculating the current fluid flow velocity; and otherwise, outputting the updated current temperature field as the temperature field in the current time step length. According to the method, the mutual influence of fluid and temperature is considered, and the temperature field with high accuracy can be obtained.

The invention discloses an energy-saving servo hydraulic control system, which relates to the technical field of hydraulic control, and comprises a controller used for receiving an external control instruction and outputting an adjusting instruction according to a feedback signal; the servo driving unit receives the adjusting instruction, and a servo driver adjusts the rotating speed and the torque of a servo motor; according to the hydraulic power module, a servo motor drives a variable hydraulic pump to output oil; the hydraulic executing mechanism is used for executing a power output action; the sensing feedback module is used for collecting the position, oil way pressure and execution speed data of the hydraulic execution mechanism; the energy recovery module is used for recovering potential energy and kinetic energy under the braking or descending working condition and converting the potential energy and kinetic energy into hydraulic energy to be stored and reused; and the control valve group is used for accurately controlling the on-off, the flow direction and the flow distribution of the oil liquid. Through flow-pressure on-demand matching and graded energy recovery, the problems that a traditional hydraulic system is large in throttling loss, low in control precision and poor in load adaptability are solved.

The utility model relates to the technical field of meteorological monitoring, in particular to a meteorological monitoring device for an electric power iron tower, which comprises a fixing plate, a supporting rod, a monitoring device body and a mounting plate, the supporting rod is hinged to the upper end face of the fixing plate, the monitoring device body is fixedly arranged at the top of the supporting rod, and push rods are hinged to two sides of the supporting rod. According to the device, kinetic energy brought by strong wind can be buffered and absorbed through a damping block and a compression spring, the wind resistance of the device is effectively improved, and a fixing plate and the like can rotate through an auxiliary wind blocking push plate and a wind blocking push plate, so that a push rod, a buffer plate and the like are parallel to the wind direction; and therefore, strong wind can be effectively buffered from the front side, and the buffering effect is better and more comprehensive.