890 results about "Hydraulic drive system" patented technology

The invention relates to the technical field of hydraulic transmission, and provides a variable-speed variable-displacement electro-hydraulic power source control method and a hydraulic system.The method comprises the specific steps that the system pressure and the system flow at the current moment are obtained; the initial rotating speed of the servo motor at the current moment is detected, and the initial displacement of the two-way variable pump at the current moment is obtained; a genetic algorithm is used for obtaining the optimal displacement of the two-way variable pump and the optimal rotating speed of the servo motor; the servo motor is adjusted according to the optimal rotating speed of the servo motor, so that the two-way variable pump works at the combination point of the optimal displacement and the optimal rotating speed; and during the working period of the two-way variable pump, the steps are cyclically executed to realize real-time regulation and control of the electro-hydraulic power source. According to the method, the efficiency model and the dynamic response model of the electro-hydraulic power source are established, the intelligent optimization algorithm is used for conducting multi-target dynamic optimization on the efficiency and the response time of the electro-hydraulic power source, the rotating speed of the servo motor and the displacement of the two-way variable pump are controlled in a coordinated mode, and the electro-hydraulic power source works in a high-efficiency and high-response area.

The invention relates to a motion compensation type pile gripper perpendicularity adjustment control method which comprises the following steps: 1, mounting a tilt angle sensor and a displacement sensor on a pile gripper for detecting the tilt angle theta of a pile body and the position of a supporting arm in real time; step 2, acquiring a current inclination angle value theta c and a target value theta t through a control system, calculating a real-time perpendicularity deviation delta theta = theta c-theta t, and driving a servo mechanism to adjust the position of a supporting arm according to the perpendicularity deviation delta theta so as to perform motion compensation; and step 3, dynamically correcting the compensation process by using a closed-loop control algorithm until the condition that verticality adjustment is completed is met, namely delta theta is less than or equal to epsilon, and epsilon is an allowable error threshold. A high-precision inclination angle sensor and a displacement sensor are installed on the pile gripper, the inclination angle of a pile body and the position deviation of a supporting arm are detected in real time, and a control signal is dynamically generated through a closed-loop control algorithm to drive a servo mechanism to conduct adjustment. A dynamic parameter compensation mechanism is designed, control parameters are corrected in real time according to the inclination angle of the foundation and external force interference, the adjusting precision and stability under the conditions of complex terrains and dynamic external force are remarkably improved, a servo mechanism achieves precise action through a hydraulic driving system and a proportional control valve, the response time of the servo mechanism meets the engineering requirement, and the engineering cost is reduced. And the perpendicularity error of the pile body can be controlled within a preset range, the construction efficiency and the long-term stability are improved, and the problem that a traditional manual adjustment and mechanical auxiliary system is insufficient in precision is solved.

The invention belongs to the technical field of hydraulic transmission and control, and discloses a high-precision positioning control method and system of a servo electro-hydraulic actuator. Real-time operation parameters of a servo electro-hydraulic actuator under different working frequencies are obtained, a servo valve dynamic return difference characteristic curve is constructed, a return difference characteristic change mode is extracted, and a dynamic influence model of return difference characteristic change on positioning precision is established. Based on the model, a frequency self-adaptive compensation strategy is designed in combination with a pressure fluctuation value of a hydraulic system, and real-time correction of a servo valve control signal is achieved. According to the method, a differentiation strategy combining low-frequency feed-forward compensation and high-frequency feedback compensation is innovatively adopted, a smooth transition mechanism is designed, and the problem that the positioning precision fluctuates under the frequency change working condition in a traditional control method is solved. According to the invention, high-precision positioning control of the servo electro-hydraulic actuator in a full frequency band range is realized, and the positioning precision and stability of the system under a dynamic working condition are improved.

The invention relates to an intelligent oil containment boom mechanical arm device and a control method thereof. The intelligent oil containment boom mechanical arm device comprises a mechanical arm, a hydraulic driving system, a sensing system and a control unit. The mechanical arm comprises a transmission base, a steering stand column, a large arm, a small arm, an overturning head and a tail end grabbing hook assembly. The hydraulic driving system comprises a hydraulic pump station, a proportional reversing electromagnetic valve group and a plurality of execution oil cylinders; the sensing system comprises a gyroscope array and a camera array to form a distributed attitude sensing network and a distributed visual sensing network; the control unit identifies and positions an oil containment boom target based on a sea surface image acquired by the distributed visual perception network, performs motion planning on the mechanical arm, and controls the mechanical arm to move and grab the target; in the target positioning process, posture changes of all parts of the mechanical arm are sensed in real time based on the distributed posture sensing network, and dynamic compensation is conducted on the posture error of the mechanical arm. According to the device, the oil containment boom can be quickly, accurately, reliably and intelligently grabbed, and the laying efficiency and safety of the oil containment boom are improved.

The utility model belongs to the technical field of tire manufacturing, and discloses a post-inflation device and tire production equipment. The post-inflation device comprises a frame body, an upper cross beam mechanism, a lower cross beam mechanism, a lifting lead screw, a lead screw nut, a worm gear, a worm and a driving piece. Compared with a hydraulic transmission mode in the prior art, the transmission structure composed of the worm gear, the worm, the lead screw nut and the lifting lead screw has the advantages that stability and safety cannot be affected by oil leakage, pipe explosion and the like, so that the stability and safety of the post-inflation device are better, and the service life of the post-inflation device is prolonged. And potential safety hazards in the tire production process can be avoided. Comprising the post-inflation device is better in stability and safety, and then potential safety hazards in the tire production process can be avoided.

The invention discloses a mold closing driving mechanism and an injection molding machine with the same, relates to the technical field of injection molding machines, and aims to solve the technical problem of high cost of automatic cutting equipment. Comprising a machine tool, a hydraulic transmission system arranged at the top of the machine tool, a mold closing mechanism arranged at the output end of the hydraulic transmission system and provided with a cooling system, a molding assembly and a twisting-off assembly arranged in a machine cover, and a material distributing assembly arranged at the top of the machine tool. According to the mold closing driving mechanism disclosed by the invention, the functions of molding and sprue waste removal are integrated into the molding rod; in a traditional production process, molding and waste removal often need to be operated separately, however, through the ingenious design, after molding is completed, a molding rod can be directly used for treating sprue waste, the conversion time between procedures is shortened, and the production efficiency is greatly improved; compared with traditional automatic cutting equipment, only few structures such as the twisting-removing assembly are added, and cost increase is limited.

Methods and systems for detecting a torque transmission failure in an aircraft power plant are provided. The system comprises a hydrostatic transmission for transmitting torque between a first shaft and a second shaft using hydraulic fluid, an a failure detector including a sensor configured to detect a pressure change in the hydraulic fluid. The failure detector is configured to generate an output indicative of the torque transmission failure in response to the pressure change having crossed a threshold.

The invention provides an electro-hydraulic composite rotation control system, and relates to the technical field of hydraulic transmission, the system combines the speed control advantage of motor driving and the high power density characteristic of hydraulic driving, and the stability, high efficiency and high power output in the rotation process are considered; the system mainly comprises a driving motor, a main pump, a four-quadrant pump / motor and other components, dynamic response and closed-loop control between the motor and the hydraulic pump / motor are achieved through an electro-hydraulic composite coordination control strategy and an optimal torque distribution algorithm based on a genetic algorithm, the starting and braking time is effectively shortened, and the rotation efficiency is improved. In the rotary braking process, kinetic energy is converted into hydraulic energy or electric energy to be stored through the energy recovery function of the four-quadrant pump / motor and the electric power generation all-in-one machine, and the energy recovery efficiency is improved. In addition, the system has the capability of outputting torque by assisting the four-quadrant pump / motor under special working conditions, and the adaptability and stability of the system are further enhanced.

The invention provides a distributed electro-hydraulic driving system based on bucket rod independent oil supplementation and an electric excavator. The distributed electro-hydraulic driving system comprises a bucket distributed system assembly, a bucket rod distributed system assembly, a movable arm distributed system assembly and a hydraulic oil tank. Each distributed system assembly is provided with a driving motor to drive an open type variable pump to supply oil to the open type variable pump so as to independently drive a corresponding working oil cylinder to operate, and each bucket rod distributed system assembly is additionally and independently provided with a bucket rod oil supplementing motor to drive a bucket rod metering pump to supply oil to the bucket rod metering pump so as to solve the problems that when a bucket rod oil cylinder operates rapidly, the flow demand is large, and the operation is complex. And oil supply is insufficient. The system aims at achieving high-energy-efficiency distributed driving of multiple linear actuators of the electric excavator so as to solve the problems that a centralized hydraulic system of an existing electric excavator is high in energy consumption and low in energy efficiency.

In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a controller calculates target power to be consumed by the hydraulic pump on the basis of the capacity of the hydraulic pump, the delivery pressure of the hydraulic pump sensed by a pressure sensor, and a target revolution speed of the electric motor, and limits the target revolution speed of the electric motor in such a manner that the target power falls within a range of the maximum allowable power.

The invention discloses a double-push-rod hydraulic deviation rectifying device, and relates to the technical field of conveyor belt deviation rectifying, a mounting plate and a mounting frame rotationally connected to the mounting plate, two first mounting pipes are rotationally connected to each of the two sides in the mounting frame, and an adjusting pipe and a deviation rectifying adjusting mechanism are fixedly connected between the two first mounting pipes; according to the double-push-rod hydraulic deviation rectifying device, the multiple mounting plates are fixedly mounted on the conveyor, when a belt on the conveyor deviates, the belt drives the hydraulic transmission control mechanism to operate at the moment, then the hydraulic transmission control mechanism starts the electric hydraulic push rods to operate, the electric hydraulic push rods are driven by the belt to operate, and the deviation rectifying adjusting mechanism is driven by the electric hydraulic push rods to operate. The electric hydraulic push rod drives the mounting frame to rotate, so that the belt is driven to move, the belt inclines towards one side, meanwhile, the belt is driven to move through the adjusting roller, the belt moves towards the middle position of the mounting frame, and therefore automatic deviation correction of the deviated belt is achieved.

The drive system comprises a hydraulic pump and a hydraulic motor, both having an inlet port and an outlet port, the motor being a fixed displacement motor directly coupled to the cleaning fan for rotationally driving said fan, the pump being a variable displacement pump configured to produce a flow of hydraulic liquid to the motor. In a system according to the invention, the outlet port of the pump is coupled to the inlet port of the motor by a hydraulic line, wherein said line does not comprise a valve for regulating a flow of hydraulic liquid to the motor. In the system of the invention, the flow to the motor is not regulated through a flow regulating valve between pump and motor, but by changing the pump displacement electronically. To this aim, the pump includes an electronically actuated hydraulic control system for controlling the pump displacement regardless of the hydraulic pressure of the liquid in the hydraulic line between the pump and the motor. The pump and the motor are part of an open hydraulic circuit.

The invention discloses a motor temperature control method and system based on hydraulic transmission and fuzzy control. The method comprises the steps that current temperature data are collected in real time through temperature sensors arranged in a plurality of key temperature areas in a driving motor and preprocessed; predicting the temperature change trend of the key temperature zone by adopting a self-learning fuzzy control algorithm, and generating a hydraulic coarse tuning signal and an electromagnetic fine tuning signal; controlling a hydraulic actuating mechanism to adjust the flow of a cooling medium to realize preliminary cooling, and controlling an electromagnetic fine adjustment mechanism to adjust the flow of the cooling medium corresponding to a local area in the key temperature area to perform temperature compensation; and uploading the regulated current temperature data to a cloud platform in real time, updating control parameters, and feeding back the control parameters to a self-learning fuzzy control algorithm to form closed-loop control. According to the invention, real-time dynamic balance regulation and control of the temperature of each key temperature zone in the driving motor can be effectively realized, and local thermal load changes are quickly responded, so that the overall temperature of the driving motor stably reaches a preset standard.

The utility model belongs to the technical field of tire manufacturing, and discloses a post-inflation device and tire production equipment. The post-inflation device comprises a frame body, an upper cross beam mechanism, a lower cross beam mechanism, a lead screw, a driving nut, a driving assembly and a limiting assembly. Compared with a hydraulic transmission mode in the prior art, the transmission structure composed of the lead screw and the driving nut has the advantages that stability and safety cannot be affected by oil leakage, pipe explosion and the like, so that the stability and safety of the post-inflation device are better, and the post-inflation device is convenient to use. And potential safety hazards in the tire production process can be avoided. Comprising the post-inflation device is better in stability and safety, and then potential safety hazards in the tire production process can be avoided.

The invention relates to a digital twin modeling method and consistency optimization method of hydraulic forming equipment, and the method comprises the steps: building a digital twin model of the hydraulic forming equipment which comprises terminal forming equipment, a hydraulic driving system and a controller, the digital twin model comprises a multi-body dynamics simulation unit, a hydraulic system simulation unit and a control system simulation unit; operating data of the hydraulic driving system and the terminal forming equipment are acquired through the data acquisition system, and the operating data are input into the hydraulic system simulation unit and the control system simulation unit; the control system simulation unit generates a simulation control signal by adopting feedback control logic based on the operation data and sends the simulation control signal to the controller and the hydraulic system simulation unit; the hydraulic system simulation unit generates a simulation driving signal according to the operation data and the simulation control signal and sends the simulation driving signal to the multi-body dynamics simulation unit, and the multi-body dynamics simulation unit displays the motion condition of the terminal forming equipment based on the simulation driving signal.

The invention discloses a hydraulic crusher transmission device for mining, and relates to the technical field of hydraulic transmission, the hydraulic crusher transmission device comprises a cylinder body and a hydraulic system arranged in the cylinder body and used for driving an oil cylinder rod to move, and further comprises a drill rod used for crushing ores, and a nitrogen chamber used for containing compressed nitrogen is formed in the top of an inner cavity groove; the cylinder body is provided with an auxiliary energy mechanism for adjusting the impact acting force of the drill rod on a mining face, the auxiliary energy mechanism comprises an axial position ring which is located in the inner cavity groove and is coaxial with the oil cylinder rod, the axial position ring is provided with a cylindrical cavity channel for oil liquid to circulate, and the cylinder body is provided with a pressure speed assembly for adjusting the flow speed in the cylindrical cavity channel to change the flow speed of the oil liquid in contact with the axial convex part; by arranging the auxiliary energy mechanism, the impact force on the mining face can be improved by changing the sectional dimension of the cylindrical cavity channel, utilizing the Venturi effect and increasing the oil flow speed according to the change of the rock hardness in the actual mining process, so that the purpose of dynamically adjusting the impact force of the drill rod on the mining face is achieved.

The invention discloses a glass toughening bending forming device, and relates to the technical field of glass forming. The device comprises a device body, a high-temperature chamber is arranged on the left side in the device body, a forming assembly is arranged in the device body and is in hydraulic transmission, a forming auxiliary assembly is arranged on the upper portion in the device body, and the bottom of the forming auxiliary assembly is in an arc shape; a preparation frame is fixedly installed on the left side of the device body, a fixing plate is fixedly installed on the left side of the preparation frame, a double-head motor is fixedly installed on the side, away from the center of the preparation frame, of the fixing plate, and an arc groove rod is fixedly installed at the output end of the side, close to the center of the preparation frame, of the double-head motor. The surface of the raw glass sheet is uniformly brushed by the brushing plate, so that flaws caused by deep sinking of particles on the surface of the raw glass sheet during subsequent heating are prevented, and the strength of a finished product is prevented from being reduced.

The present invention relates to a vertical take-off and landing (VTOL) aircraft featuring a central fuselage and at least two power units. Each power unit is connected to at least two separate lifting rotors via transmission lines, ensuring that each power unit is linked to at least two rotors diametrically opposed relative to the centre of gravity of the aircraft. The lifting rotors might be driven by power transmission lines of hydrostatic type. The power units on either side might be housed in separate pods which might be incorporated into the main fuselage or arranged as separate pods. These separate pods might also function as floats / pontoons for the aircraft to land, take-off and manoeuvre on water.

The invention discloses a wheel-foot vehicle combining a wheel type mode and a foot type mode. The wheel-foot vehicle comprises bionic legs, a hydraulic driving system, non-pneumatic tires and an anti-rolling vehicle frame. The bionic legs comprise thighs and shanks to enhance obstacle crossing ability, the hydraulic driving system provides strong power and sufficient displacement for the three-stage hydraulic columns, the non-pneumatic tires are polyurethane flexible spoke type tires to reduce maintenance, and the anti-rolling frame guarantees safety of the vehicle and passengers. The designed wheel-foot vehicle aims at improving the trafficability and maneuverability of complex terrains, through an innovative wheel-foot conversion mechanism, the capacity of fast wheel-type running on a flat road surface and foot-type obstacle crossing on a rugged ground is achieved, and high adaptability and operation flexibility are achieved.

The invention discloses a rope-driven parallel mechanism for capturing of an underwater unmanned submersible vehicle, and belongs to the technical field of capturing of underwater unmanned submersible vehicles. A plurality of rope driving motors are fixedly arranged on a catamaran console of the catamaran navigation system, and motor pulleys are fixedly arranged on output shafts of the rope driving motors; the upper ends of the two shear type telescopic mechanisms are fixedly connected with the left side and the right side of the lower end of the catamaran navigation system, the hydraulic driving system is fixedly arranged between the upper ends of the two shear type telescopic mechanisms, and the hydraulic driving end of the hydraulic driving system is connected with the two shear type telescopic mechanisms. The two shear type telescopic mechanisms are driven by the hydraulic driving system to stretch or retract underwater; one end of a steel wire rope is connected with a motor pulley, and the other end of the steel wire rope sequentially bypasses a catamaran pulley on the catamaran navigation system, a shear-type pulley on the shear-type telescopic mechanism and a guide pulley to be connected with the capturing system to perform six-degree-of-freedom movement, so that the unmanned underwater vehicle is quickly and efficiently captured and recovered in a complex underwater environment.

The invention discloses an anti-overturning active control method and device for a single-column pier bridge and a medium. The method comprises the steps that a thundersight displacement monitoring system and a hydraulic driving system are deployed; leighting multi-mode fusion data are obtained, and the transverse overturning angle of a beam body is calculated; constructing a digital twinborn body for predicting the overturning state of the bridge structure, and predicting the overturning states of the bridge at multiple moments in the future; and constructing an intelligent agent, and controlling the hydraulic driving system to execute an anti-overturning action based on the predicted bridge overturning state. The device and the medium are both used for implementing the method. The beneficial effects of the invention are that the structure displacement monitoring method based on Reighting heterogeneous fusion is provided for a traditional mode of a single structure displacement detection means, interference factor identification and weighted fusion in different environments are realized, and the reliability of monitored structure displacement data is ensured.

The utility model relates to the technical field of hydraulic driving, and provides a hydraulic driving system. The hydraulic driving system comprises a hydraulic cylinder, a driving oil way and an electric driving structure. The hydraulic cylinder comprises a cylinder body with a cavity, a piston arranged in the cavity in a sliding mode and a piston rod connected to the piston. The piston and the piston rod jointly divide the cavity into a rodless cavity and a rod cavity. The driving oil path is communicated with the rodless cavity and the rod cavity; the electric driving structure is arranged in the rod cavity and comprises a permanent magnet and a winding, the permanent magnet and the winding are sleeved, one is arranged on the cylinder body, and the other is arranged on the piston rod or the piston. According to the hydraulic driving system provided by the invention, the response speed and the response range are improved and expanded through combination of two modes of hydraulic driving and electric driving, and the hydraulic driving system has higher safety redundancy.

The invention discloses a self-adaptive parameter control system and method for a halfpace field rice transplanter based on full-hydraulic transmission, particularly relates to the technical field of hydraulic parameter control, and aims to solve the technical problem of dynamic power competition between a walking system and a planting device when the full-hydraulic transmission rice transplanter works in a halfpace field. Working pressure signals of a walking motor and a planting device are monitored in real time, the divergence degree of envelope lines of the two pressure signals is calculated so as to recognize the power competition state of a system, and when power competition is detected, the required power of two execution mechanisms is dynamically calculated, and a hydraulic pump displacement distribution coefficient is generated; and then the interaction characteristics of the outlet pressure of the main pump and the output flow signal and the transmission characteristics of the pressure signal of the executing mechanism are fused, the dynamic balance degree of the system is generated, the displacement distribution coefficient is corrected, and finally the opening degree of the walking motor and the proportional valve of the planting device is synchronously adjusted based on the corrected coefficient. Accurate distribution and dynamic balance control of the power of the hydraulic system are achieved.

The invention discloses automatic feeding equipment for mobile phone frame wave band forging, and relates to the technical field of mobile phone frame forging. The automatic feeding equipment comprises a workbench, a positioning assembly is arranged at the top of the workbench, a feeding assembly is arranged on the right side of the workbench, auxiliary assemblies are arranged at the bottoms of the workbench and the feeding assembly, and a push plate is located below parts. According to the automatic feeding equipment for mobile phone frame wave band forging, through cooperative work of the feeding assembly and the auxiliary assembly, automatic feeding and automatic supplementing of parts are achieved, when a mechanical arm adsorbs the parts, a push plate moves upwards to push the parts out of a material box through a series of hydraulic transmission mechanisms by means of the downward pressing action of the parts, and the automatic feeding equipment is convenient to use. And after the parts are moved away, automatic resetting and hydraulic oil supplementing can be achieved, preparation is made for next-time feeding, the feeding efficiency is improved, the production interruption time is shortened, and therefore the overall production efficiency is improved.

The utility model relates to the technical field of agricultural implements, in particular to an automatic speed regulation type traction type hydraulic self-power driving rake which comprises a frame used for being connected with a tractor, a rake body connected to the periphery of the frame, a main power device installed on the frame, a hydraulic transfer case connected to the main power device and an oil pump installed on the hydraulic transfer case. An oil pipe is connected to the oil pump, a proportional valve used for adjusting the flow of liquid in the oil pipe is installed on the oil pipe, and a branch power device used for being connected with the oil pipe is installed on the rake body. Power is transmitted through hydraulic pressure, flexible driving is carried out, a machine tool can be well protected if hard sundries exist, an oil pipe can be made of a soft pipe so that assembly layout can be more convenient and reasonable, the size of the driving harrow can be conveniently increased according to requirements, and the rotating speed of harrow teeth can be adjusted more flexibly through hydraulic transmission; the increase and decrease of the liquid flow can be steplessly adjusted through the proportional valve, so that the adjustable range of the rotating speed is expanded to adapt to different soil environment requirements.

The invention provides an active yaw control method for a single-point mooring floating type draught fan platform, and belongs to the technical field of offshore wind power. A wind direction angle is obtained in real time through a wind direction sensor, and the deviation between the wind direction angle and the azimuth angle of a platform main shaft is judged; the system calculates the average wind direction in a set time window so as to suppress the influence of high-frequency wind direction disturbance. The controller dynamically calls a model predictive control (MPC) algorithm according to wind direction deviation, outputs a target rotation angle of the flow guide rudder, drives the flow guide rudder to adjust the direction of the flow guide rudder, generates a yaw moment acting on the platform, and guides the platform to rotate around a single-point mooring rotor to realize active wind facing; the guide rudder assembly and the hydraulic driving system are arranged between the vertical columns with the heaving plates in cooperation with the platform, accurate and rapid attitude control can be achieved, and the wind facing capacity and the structural stability of the draught fan are remarkably improved. According to the wind turbine platform, the wind facing posture can be adjusted in real time according to the change of the wind direction, so that the wind energy utilization efficiency is improved, and the power generation requirement under the deep and far sea complex environment is met.

The invention belongs to the technical field of metal material cold machining strengthening, and particularly relates to an omni-directional powerful numerical control rolling machine tool for axle strengthening, which comprises a machine tool body, and a spindle box, a radial feeding mechanism and a tailstock which are sequentially arranged on the machine tool body, opposite rotary tables are arranged above the radial feeding mechanism, and rolling devices are arranged on the rotary tables; the rolling device is internally provided with two rolling heads arranged back to back, and the rolling heads are switched through a rotary table. The invention further discloses an axle strengthening machining method which comprises six steps that three-dimensional space accurate positioning is achieved through the axial and radial numerical control seven-axis linkage interpolation technology, and the rolling device is pushed through the hydraulic driving system to apply high-strength acting force; the rotary table is adopted to drive the rolling heads to quickly switch the rolling heads for different shaft sections, so that the efficiency is improved; the device has the advantages of high automation, large rolling force, high reliability and the like, the roughness of the workpiece surface is remarkably reduced, the surface hardness is improved, the axle surface layer is strengthened, the wear resistance is improved, and the service life is prolonged.

An electric push control system for a vertically pivoted protective door. The electric push control system comprises: a protective door, the protective door comprising a door body; and an electric-cylinder-driven vertically pivoted door body opening and closing device, which comprises a driving electric motor module and a push rod in power connection with the driving electric motor module, with the electric-cylinder-driven vertically pivoted door body opening and closing device being hinged relative to a mounting base, and the push rod being hinged to the door body. In the present invention, the door body is driven by an electric cylinder structure to open and close, and the present invention achieves a small arrangement space and a large opening and closing torque; the electric-cylinder-driven vertically pivoted door body opening and closing device has a simple structure, reducing the complexity of maintenance and management; compared with a hydraulic driving system, the electric-cylinder-driven vertically pivoted door body opening and closing device does not require the periodical replacement of hydraulic oil, the cleaning of an oil path and the maintenance of hydraulic elements, thereby reducing the maintenance cost and workload, and providing a solution conforming to environmental protection and modern management. After being put into practical application, the present invention can solve problems in the prior art, such as inconvenient maintenance and a low level of operating safety, caused by using a hydraulic driving system in a protective door.

The invention relates to the field of rolling forming of metal plate parts, in particular to a plate-roller composite rolling forming method and device for plate parts with variable cross-section characteristics. The forming equipment comprises an upper roller, a lower die, a gear, a rack, a guide rail, a sliding block, a supporting seat, a first base, a second base, a supporting frame, a cylindrical roller bearing, a bearing cover, a mandrel, a fastening nut, a gasket, a hydraulic push rod and a hydraulic driving system. The forming method comprises the following steps: blanking, designing an upper roller and a lower die, adjusting the relative position of the upper roller and the lower die, heating a plate to a set deformation temperature, deforming the plate under the combined action of a convex die of the upper roller and a groove of the lower die, and rolling into a target plate part. The device is applied to forming of variable cross-section characteristic plate parts, and has the characteristics of high production efficiency, high finished product precision, high material utilization rate, simple assembly structure, convenience in realization of automation and the like.

The invention provides a robust hydraulic control and simulation system and method for a mechanical arm, and the method comprises the steps: determining the position and type of a kinematic pair based on a three-dimensional model, and building a multi-body dynamics simulation system of the mechanical arm; determining a transmission mode according to the hydraulic original drawing, and establishing a hydraulic transmission simulation system of the mechanical arm; and an action execution control algorithm is designed, and a feedback control simulation system of the mechanical arm is established. According to the simulation system, a joint simulation technology is adopted, intercommunication among a multi-body dynamics system, a hydraulic transmission system and a feedback control system is achieved, and a mechanical-hydraulic-control joint simulation platform is formed. On the basis, a robust hydraulic transmission system and a robust feedback control system are designed, and finally the performance of the mechanical arm in the complex environment is improved.