3286 results about "Hydraulic control" patented technology

The invention relates to the technical field of compression molding of carbon fiber prepregs, in particular to a partitioned pressurization control method and system for compression molding of the carbon fiber prepregs and a molding process. S2, initial pressure calculation; s3, gradient pressurization control; s4, dynamic pressure adjustment; and S5, a global pressure maintaining stage: when the resin curing degree alpha reaches 0.6-0.8, switching to a full-screen pressure maintaining mode, and maintaining the pressure of each region to be 90%-95% of the current maximum pressure value until curing is completed. The invention provides a zoning pressurization control method and system for compression molding of carbon fiber prepreg and a molding process, and realizes the compression molding method and system with accurate zoning pressure regulation and control and directional discharge of volatile components. And by integrating intelligent sensing, multi-channel hydraulic control and a data driving optimization algorithm, the limitation of a traditional process is broken through, and a technical support is provided for efficient forming of the high-performance carbon fiber composite material.

The invention relates to the technical field of civil engineering construction, in particular to a precise positioning civil engineering pile foundation construction system which comprises a multi-source space sensing and positioning module, a space-time multi-dimensional data fusion module, a three-dimensional guiding and correcting module, a hydraulic control module and a closed-loop feedback optimization module. The multi-source space sensing and positioning module obtains pile machine position and attitude information through the Beidou / GNSS high-precision positioning unit, the inertia high-precision navigation unit and the laser horizontal measurement unit, and the space-time multi-dimensional data fusion module processes and fuses the information to generate unified space position data. The three-dimensional guiding and correcting module compares the data with preset pile position coordinates, if the deviation exceeds a threshold value, a correcting instruction is generated, the hydraulic control module executes the instruction and adjusts the position and the posture of a pile machine, the closed-loop feedback optimization module collects the data in the correcting process and optimizes a correcting strategy, all-weather centimeter-level precision space positioning is achieved, and the positioning precision is improved. And the accuracy and efficiency of pile foundation construction are improved.

The invention discloses a radial forging machine chuck rotation oscillation braking electro-hydraulic control system and method, and the control system comprises a position detection encoder installed on a hammer head of a forging main machine, a hydraulic servo motion controller, a high-frequency servo valve, an oscillation braking oil cylinder with the same area as an A cavity and a B cavity, and an oscillation braking device with a worm gear and a worm. The pressure sensor and the displacement sensor are integrated on the oil cylinder to form a closed-loop control loop; the control method comprises the following steps: activating an oscillation braking function and collecting hammer phase, oil cylinder pressure and displacement signals in real time; a sine control signal synchronous with the forging frequency is generated based on the brake phase of 270-360 degrees; a brake oil cylinder is driven to push the worm to axially move, and the rotating speed of the chuck is modulated through the helix angle characteristic; and the amplitude is dynamically adjusted through a displacement-pressure feedback signal, and 25MPa overrun protection is executed. The purposes of reducing the brake response delay rate, the forge piece distortion rate and the equipment impact load are achieved, and 90-620 times / min wide-frequency-domain forging is supported.

The invention provides an underground coal mine air and water pumping switching electro-hydraulic control system and method, the electro-hydraulic control system comprises an air supply control module, a water supply control module, a negative pressure control module and an oil supply module, and the method adopts a remote control system to control the underground coal mine air and water pumping switching electro-hydraulic control system. According to the underground coal mine air and water pumping switching electro-hydraulic control system, air and water pumping electric control rapid opening and closing and rapid switching of different functions are achieved, the automation degree of air and water pumping switching is improved, and the air and water pumping switching time is shortened; and meanwhile, when dangerous working conditions that gas accumulation exceeds the limit due to hole blocking behind the drill hole or carbon monoxide gas appears in the drill hole and the like, rapid and automatic response processing can be achieved. The air and water pumping conversion efficiency is improved, the labor intensity of workers is relieved, and key technical support is provided for coal mine underground automatic drilling whole-process operation.

The invention provides a hydraulic control system of an asymmetric hydraulic cylinder, and relates to the technical field of hydraulic control, the hydraulic control system comprises a bidirectional hydraulic pump, a hydraulic motor and an energy accumulator, the bidirectional hydraulic pump is in transmission connection with a first servo motor, and a first oil port and a second oil port of the bidirectional hydraulic pump are connected with a rod cavity and a rodless cavity through a first oil way and a second oil way respectively; a first one-way valve is arranged between the second oil port and the rodless cavity; the hydraulic motor is in transmission connection with the generator which is connected with the electric energy storage unit. The hydraulic motor is connected with the first one-way valve in parallel; the energy accumulator communicates with the first oil way and the second oil way through a second one-way valve and a third one-way valve correspondingly. Four-quadrant seamless switching can be achieved, the structure is simpler, the complexity of a pipeline in a hydraulic system is remarkably reduced, energy collection can be conducted on oil discharged by a rodless cavity, and energy consumption is further reduced.

The technical scheme of the invention relates to the technical field of control and adjustment, in particular to a crawler-type articulated vehicle braking system applied to a low-temperature environment. Through multi-module collaborative optimization and a closed-loop control mechanism, the problems of unbalanced dynamic distribution of braking force, insufficient redundancy fault tolerance and signal distortion under the low-temperature working condition are solved. The data acquisition module is used for acquiring a hinging angle, an inertial measurement unit attitude, a braking temperature and a vehicle state signal in real time; the optimization control module performs multi-objective optimization on the dynamic weight coefficient, the redundancy switching threshold value and the fuzzy rule parameter based on a genetic algorithm to generate a weight distribution scheme of a hinge angle compensation mode and an inertial measurement unit dominant mode; the adjusting module generates a brake pressure reference value through temperature self-adaptive analysis and synchronizes hydraulic control units of a front vehicle and a rear vehicle, and all the modules remarkably improve the dynamic stability and the low-temperature working condition fault-tolerant capability of a brake system through full-link cooperation of environment perception, parameter iteration and redundancy execution.

The invention discloses a multi-scale wear fatigue joint simulation method and system for a valve element and a valve sleeve of a servo valve, and relates to the technical field of hydraulic control. A geometric model is designed according to structural parameters of a valve structure, and the geometric model is divided into multiple assemblies; defining material parameters of each component, and correspondingly associating the material parameters with each component; defining a wear model of the contact surface of the valve core and the valve sleeve; defining a nonlinear mechanism of the fatigue model; defining a coupling model of a coupling relationship between the wear model and the fatigue model; performing grid division on the geometric model by adopting a dynamic grid updating model, and taking all grid units as simulation analysis objects; performing simulation analysis on the coupling model; according to the simulation result, the wear fatigue coupling failure behavior of the valve element and the valve sleeve is predicted, and the design of the valve element and the valve sleeve is optimized. According to the method, the submicron wear depth prediction precision can be realized, the service life prediction error is reduced compared with that of a traditional method, and a quantitative basis is provided for reliability design and condition-based maintenance of a high-precision servo valve.

A first output end of a two-way hydraulic pump is connected with one end of a second oil way, one end of a third oil way and one end of a first auxiliary oil way, the other end of the second oil way is connected with a left end connector of a shuttle valve, the second oil way is communicated with the third oil way, and a first hydraulic control one-way valve is installed in the third oil way; the other end of the third oil way is connected with a rodless cavity of the hydraulic cylinder, and the other end of the first auxiliary oil way is matched with one end of the second hydraulic control one-way valve. A second output end of the bidirectional hydraulic pump is connected with one end of a fourth oil way, one end of a fifth oil way and one end of a second auxiliary oil way, the other end of the fourth oil way is connected with a right end connector of the shuttle valve, the fourth oil way is communicated with the fifth oil way, a second hydraulic control one-way valve is installed in the fifth oil way, and the other end of the fifth oil way is connected with a rod cavity of the hydraulic cylinder. The other end of the second auxiliary oil way is matched with one end of the first hydraulic control one-way valve. According to the invention, the vehicle door can be automatically opened or closed.

Low-pressure oil enters an inlet of a proportional overflow valve, the pressure of a low-pressure system is controlled by the proportional overflow valve, pressure oil on the low-pressure side acts on a plunger control cavity of the hydraulic control overflow valve through a pressure stabilizing damper and a one-way valve, and hydraulic pushing force generated by a plunger is transmitted to an overflow valve steel ball through a disc spring; when the force obtained by multiplying the ultrahigh pressure of the inlet of the hydraulic control overflow valve by the action area of the steel ball is equal to the pushing force of the plunger, the steel ball of the overflow valve is opened to start overflowing, and the overflow pressure of the ultrahigh pressure system can be controlled by adjusting the pressure of the proportional overflow valve of the low-pressure system. The external control type ultrahigh-pressure proportional pressure regulating valve can be used for pressure regulation of a hydraulic system with the pressure being 200 MPa or above and can be used as a proportional overflow valve of an ultrahigh-pressure hydraulic system. By arranging a hydraulic loop of two auxiliary oil ports of the external control type ultrahigh pressure proportional pressure regulating valve, the pressure rising one-way proportional regulating function, the pressure unloading function and the pressure rising / falling two-way proportional regulating function of an ultrahigh pressure system can be achieved.

A winch hydraulic control system includes a hydraulic oil tank, a hydraulic pump, and an electric motor. The hydraulic pump's oil inlet is connected to the hydraulic oil tank, the electric motor is connected to the hydraulic pump, and the hydraulic pump's oil outlet is connected to both port P of the main reversing valve assembly and port P of the control valve assembly. Ports A and B of the main reversing valve assembly are connected to port A of the first shuttle valve, port A of the balancing valve assembly, and port B of the control valve assembly, respectively. Port X is connected to port B of the second solenoid reversing valve. Ports B and C of the first shuttle valve are connected to port B of the balancing valve assembly and port B of the second shuttle valve, respectively. A third pressure reducing valve is connected in parallel with the second solenoid valve. Port P of the second solenoid reversing valve is connected to port X of the control valve assembly, port A of the second shuttle valve, and port SP of the balancing valve assembly. Port C of the second shuttle valve is connected to the rod chamber of the brake. The brake is connected to the hydraulic motor, and the oil outlet of the control valve assembly is connected to the oil inlet of the balancing valve assembly. This design can maintain constant wire rope tension and stable operation.

The present invention provides a hydraulic valve control method, system and device to flexibly, quickly and simply implement hydraulic valve control. The above-mentioned hydraulic control device includes a controller and a hydraulic valve. The method includes: the controller loads a modular program; wherein, the modular program at least includes: at least one general function module, the call sequence of each general function module, the input-output relationship between general function modules, and the connection relationship between the interface of the hydraulic valve and the general function module; each general function module encapsulates multiple functions; each general function module provides at least one pin externally; the pin internally encapsulates the definition of multiple variables and the function operation on the variables; the input-output relationship includes: the connection relationship of pins between modules; the controller executes each general function module in the modular program according to the call sequence, input-output relationship and connection relationship to perform data interaction with the corresponding interface of the hydraulic valve.

The utility model discloses a non-impact type electro-hydraulic control one-way valve which comprises a valve body, a control piston is arranged at the position, close to one side, in the valve body, a limiting rod is fixedly connected to the center of one side of the control piston, a rubber block is fixedly installed at one end of the limiting rod, and an ejector rod is fixedly connected to the center of the other side of the control piston. According to the non-impact type electro-hydraulic control one-way valve, through rubber blocks, a connector, a first spring, a movable block, a buffer block, a rubber ball, a second spring and a third spring, after a piston is controlled to complete actions and reset, the rubber block at one end of a limiting rod is tightly attached to the inner wall of the valve body, and impact generated when the piston is reset is further buffered through elasticity of rubber; in the moving process of the ejector rod, the buffer block stably moves towards the cone valve element, the rubber ball on the buffer block serves as a flexible part making contact with the cone valve element firstly, and the impact force and noise generated when the rubber ball makes contact with the cone valve element are effectively reduced.

The application relates to the technical field of liquid control check valves, and discloses a plug-in type large-flow liquid control check valve structure with an adjustable pilot ratio, which comprises a pilot valve block and a main valve core, the pilot valve block is provided with a protective cap, one end of the protective cap is provided with a first base, a limiting rod is movably connected in the first base, a guide plunger is in contact connection with one end of the limiting rod, a top rod is in contact connection with the bottom of one end of a rotating lever, a steel ball is in contact connection with the bottom of the top rod, the steel ball is movably connected in the second base, the second base is provided with a third return spring, the pilot valve block and the main valve core are composed of two-stage structures, the pilot valve block adopts a unique mechanical structure, the control pilot ratio of the liquid control check valve is changed by adjusting the limiting rod, the main valve core adopts a two-way plug-in valve, the characteristics of high flow capacity of the two-way plug-in valve are fully utilized, the problem of large flow is solved, and the designed flow of the application can reach 5000 L / min.

The invention discloses a low seam few-person fully mechanized coal mining face mining system and method, the system comprises a coal mining machine automatic control system and a hydraulic support electrohydraulic control system, the coal mining machine automatic control system realizes position information transmission and height adjustment of a coal mining machine; the hydraulic support electro-hydraulic control system achieves hydraulic support pulling, pushing and sliding, machine following and support moving and automatic control over actions of the hydraulic support, and the remote control system conducts three-machine linkage control over key production equipment of the fully mechanized coal mining face, automatic control, locking, sudden stop, fault diagnosis, automatic liquid supplementing and data information transmission on the hydraulic support. Coal face equipment has the functions of coal wall video monitoring and the like, and the production process is automatically completed; the coal mining process is intelligent, data transmission is informationized, and on-site operators operate and produce with few persons, so that manual intervention is reduced as much as possible, and high-yield, efficient and safe production is ensured.

The invention relates to the technical field of tractor heat dissipation, in particular to a modular integrated tractor heat management method which comprises the steps that an engine radiator, a condenser, an engine oil radiator and a hydraulic radiator are arranged on the air outlet side of a cooling fan with the fan blade angle adjustable in a centralized mode; when the tractor operates in a working condition state, actual temperature data of an engine heat dissipation module, a transmission system heat dissipation module, a hydraulic system heat dissipation module and an air conditioning system heat dissipation module are collected; preset temperature difference data and preset fan rotating speed data corresponding to the working condition state are obtained; calculating an actual temperature difference value corresponding to the preset temperature difference value; and judging the actual temperature difference value of each item and the corresponding preset temperature difference value in real time, and controlling the wind direction and the rotating speed of the cooling fan in real time according to the judgment result. The invention further provides an electro-hydraulic control heat dissipation system applying the thermal management method. Heat dissipation and reverse blowing cleaning self-cleaning are carried out on all radiators of the tractor, the power loss is reduced, and the energy loss is reduced.

The invention relates to the technical field of injection molding machine hydraulic control, in particular to an injection molding machine hydraulic pump control system and a control method thereof, and aims to solve the problems of high energy consumption, high cost or poor temperature control of a traditional hydraulic scheme. The system comprises a hydraulic oil tank, a driving unit and an oil way control module. The driving unit comprises a driving motor, and a fixed displacement pump and a plurality of swash plate type variable displacement piston pumps which are driven by the driving motor, and swash plates of the variable displacement pumps can be switched between negative and positive angles so as to adjust the displacement or actively suck oil; the oil way control module is provided with a flow collecting valve set capable of switching flow collecting / independent states of oil outlet ways of the constant displacement pump and the variable displacement pump, the integrated cooling unit forms an independent cooling filtering loop, the temperature and pressure adjusting assembly is combined with a temperature sensor to control temperature and adjust pressure, and the pressure limiting protection valve set is connected with the constant displacement pump and the variable displacement pump. And the pressure limiting protection valve is matched with a pressure sensor to realize overpressure protection. According to the invention, cost and energy saving are both considered, precise temperature control and pressure protection are realized, and system stability and plastic part forming precision are improved.

According to the impact-cutting composite rock breaking hydraulic system and method for the mining heading machine, hydraulic damping and impact hammer collaborative operation are integrated, and the problems that a traditional heading machine is low in rock breaking efficiency, poor in stability and insufficient in adaptability are solved. The system comprises a cutting arm hydraulic damping system and an impact hammer hydraulic impact system, and multi-parameter closed-loop regulation and control are achieved through a controller. The device is characterized in that a double overflow protection mechanism is adopted, a proportional overflow valve and an external control overflow valve cooperate with each other, a hydraulic control one-way valve is combined for compensating an oil path, and the pressure difference of a hydraulic cylinder is dynamically kept stable; the impact hammer system adjusts the pressure of an energy accumulator through a proportional pressure reducing valve and is matched with a hydraulic control switch valve to realize variable impact energy control; based on feedback of a vibration sensor and a pressure sensor, damping and impact parameters of the cutting arm are adjusted in a self-adaptive mode through a nonlinear algorithm, and intelligent rock breaking operation under different rock stratum hardness is achieved. According to the system, the impact resistance stability, the rock breaking efficiency and the operation intelligence level of the heading machine are remarkably improved.

The embodiment of the invention provides a hydraulic control system of a garbage compression truck and the garbage compression truck, and relates to the field of garbage compression trucks. The hydraulic control system of the garbage compression truck comprises an oil cylinder, a first oil cylinder set, a second oil cylinder set, a double pump, a first multi-way valve set, a second multi-way valve set, a first oil inlet channel, a second oil inlet channel, an unloading loop and an adjusting piece, and the adjusting piece is arranged between the second oil inlet channel and the first oil inlet channel. The first oil inlet channel is used for disconnecting the second oil inlet channel from the first oil inlet channel and communicating the second oil inlet channel with the unloading loop, so that the hydraulic control system is in a shunting state; the second oil inlet channel is in one-way communication with the first oil inlet channel, and the hydraulic control system is in a confluence state. The garbage compression truck provided by the invention comprises the garbage compression truck hydraulic control system. The hydraulic system can be suitable for two kinds of mainstream garbage compression trucks and is good in universality, and the acquisition cost of the hydraulic system can be effectively reduced.

An additive manufactured (AM) hydraulic control assembly includes a first AM hydraulic passage having a first tubular wall defining a first fluid passage, a second AM hydraulic passage integrally formed with the first AM hydraulic passage and having a second tubular wall defining a second fluid passage, and an AM wall integrally formed with the first and second AM hydraulic passages and fluidly separating the first and second fluid passages. At least one of (i) a hydraulic control orifice is formed in the AM wall and configured to regulate fluid flow and pressure between the first and second fluid passages, and (ii) a ball seat is formed in the AM wall and a check ball is disposed in one of the first and second fluid passages and configured to selectively seal against the ball seat to facilitate preventing fluid flow therethrough.

The utility model discloses a novel supporting leg control valve which comprises a control module assembly and a plurality of oil cylinder supporting legs, and two hydraulic pipes are installed between the control module assembly and the oil cylinder supporting legs in a communicated mode. The hydraulic control one-way valve is additionally arranged on the hydraulic pipe of the rod cavity, the hydraulic control one-way valve is of a cone valve structure, internal leakage is small, oil pressure of the rod cavity can be effectively kept, the hydraulic control one-way valve is slightly different from a device without a hydraulic control one-way valve in the prior art during normal work, but after the device is stored for a period of time, the hydraulic control one-way valve is not damaged. The hydraulic control one-way valve with a rod cavity can play a role in keeping, so that a piston rod cannot extend out due to leakage of an oil cylinder, the problem is generally solved in an electric control mode in the prior art on an aerial work platform with supporting legs, and the defect is that the problem of time delay occurs during walking. The problem that the oil cylinder leaks and stretches out is solved in a hydraulic mode, and walking can be achieved without the landing leg contraction action in the walking process.

The invention discloses an anti-seepage repairing device for a silt dam and a leaking stoppage method, and relates to the field of seepage repairing devices. An anti-seepage repair device for a silt dam comprises repair liquid grouting equipment and a hydraulic elevator, and further comprises a grouting repair pipe, a hydraulic control system and a hydraulic control system, the grouting repair pipe is installed at the lifting end of the hydraulic elevator, and the liquid inlet end of the grouting repair pipe is communicated with the liquid outlet end of the repair liquid grouting equipment; the first nozzle is arranged on the grouting repair pipe and used for injecting liquid into the crack; the mounting ring is fixedly connected to the grouting repair pipe; the first filling air bags are fixedly connected to the grouting repair pipe at equal intervals; the crack is cleaned in a sectional mode, residual sludge in the crack can be effectively cleaned, then during follow-up grouting repair, the influence of the residual sludge on repair can be effectively reduced, the effect and quality of immediate repair are effectively improved, and use of seepage prevention repair of the silt dam is facilitated.

The invention relates to the technical field of tractor hydraulic control, in particular to a tractor hydraulic lifting system capable of achieving automatic limiting and a tractor. An oil inlet of a lifting electromagnetic valve communicates with a port P of a multi-way output valve, and an oil outlet of the lifting electromagnetic valve communicates with an oil inlet of a lifting oil cylinder; an oil outlet of the lifting oil cylinder is communicated with an oil inlet of the descending electromagnetic valve, and an oil outlet of the descending electromagnetic valve is communicated with a port R of the multi-way output valve; an oil inlet of the pressurizing electromagnetic valve is communicated with a port P of the multi-way output valve, an oil outlet of the pressurizing electromagnetic valve is communicated with an oil inlet of the limiting rod oil cylinder, an oil outlet of the limiting rod oil cylinder is communicated with an oil inlet of the floating electromagnetic valve, and an oil outlet of the floating electromagnetic valve is communicated with a port P of the multi-way output valve. The hydraulic limiting three-point suspension system has the beneficial effects that the automation degree of the tractor is greatly improved, the three-point suspension stability of the tractor in the transition process, the turning-around process and the like is greatly improved, and therefore the comfort degree of the whole tractor is improved.

The present invention provides a hydraulic system and a hydraulic control method for a self-propelled mowing and rolling machine. The hydraulic system of the self-propelled mowing and rolling machine includes: an integrated hydraulic valve block, a cutter bar lifting oil cylinder, a cutter bar tilting oil cylinder, a plurality of roller gap adjustment oil cylinders, and a pair of floating oil cylinders. The cutter bar lifting oil cylinder, the cutter bar tilting oil cylinder, the plurality of roller gap adjustment oil cylinders, and the pair of floating oil cylinders are all connected to the integrated hydraulic valve block through pipelines. Multiple groups of hydraulic control valves are integrated in the integrated hydraulic valve block, and the integrated hydraulic valve block is used to control the cutter bar lifting oil cylinder, the cutter bar tilting oil cylinder, the plurality of roller gap adjustment oil cylinders, and the pair of floating oil cylinders to perform corresponding operations, which facilitates the operation of the hydraulic system, simplifies the pipeline structure, reduces the hydraulic pipelines, improves the integration degree, and is convenient for the installation and maintenance of the hydraulic valve block.

The invention discloses a test device and a test method for a vibration and dislocation double-input lower span tilting-sliding fault tunnel. The test device comprises a test box body, a hydraulic actuator, a loading unit, a covering layer soil body, a tunnel physical model and a sensor monitoring system, wherein the test box body consists of a movable steel plate and a fixed steel plate; the loading unit consists of an angle adjusting module and a hydraulic control system; a bed rock model, a covering layer soil body and a tunnel model are arranged through a modular construction method, and data are collected in real time through soil pressure, microseismic and strain sensors and displacement meters. According to the invention, the failure mechanism of the cross-fault tunnel under the coupling action of bed rock dislocation and pulse seismic oscillation can be accurately simulated, the damage rule of the combined action of fault dislocation and seismic waves to the tunnel structure is revealed by qualitatively and quantitatively analyzing the strain, displacement, soil pressure and seismic oscillation response of the tunnel, and a test basis is provided for the aseismic design of the cross-fault tunnel.

The invention discloses a self-adaptive control method for a proportional valve, and particularly relates to the technical field of hydraulic control, and the method comprises the steps: recognizing behavior deviations such as response imbalance, inertia abnormality or environment sudden change by obtaining multi-dimensional operation data in the hydraulic control in real time, and judging whether to enter an evaluation process or not; after entering the process, extracting control behavior characteristics, calculating a dynamic structure compression degree and a control energy spectrum dispersion rate, inputting the dynamic structure compression degree and the control energy spectrum dispersion rate into a pre-training machine learning model, and outputting a control effectiveness score; respectively triggering parameter reconstruction, strategy replacement or control logic correction according to a grading threshold interval in which the score is located, so as to realize intelligent and self-adaptive regulation and control and performance maintenance of a proportional valve control strategy; preposed perception and risk judgment of control behaviors of the proportional valve are achieved, structured indexes are constructed to evaluate control adaptability, a fuzzy inference device is combined to output scores, parameter reconstruction, strategy replacement or logic correction are triggered according to risk levels, and intelligentization, self-adaptive regulation and control and stable maintenance of a control strategy are achieved.

The utility model relates to the technical field of all-steel-ball type electromagnetic multi-way valves of harvesters, and discloses an all-steel-ball type electromagnetic multi-way valve of a harvester, which comprises a composite hydraulic control plunger, the composite hydraulic control plunger comprises a second steel needle, a sealing element and a second guide column, the sealing element comprises a third steel ball and a second ball seat, and the second steel needle is connected with the second steel needle. A second ball seat is connected into the second guide column, one end of the second ball seat is connected with a third steel ball, one end of a second steel needle is connected with the third steel ball, the third steel ball is used for blocking the opening A1, the other end of the second steel needle is connected with a combined hydraulic control plunger, the combined hydraulic control plunger is slidably connected into the control chamber f, and the oil inlet chamber h is communicated with the oil return chamber g. The opening A1, the cavity j, the oil inlet chamber h, the oil return chamber g and the oil return channel T1 are sequentially communicated. According to the all-steel ball type electromagnetic multi-way valve of the harvester, all reversing valves are composed of double-ball type pilot valves and steel ball type hydraulic control one-way valves. The anti-pollution capacity is extremely high, and the reliability is high.

The invention relates to the technical field of special vehicle hydraulic control, in particular to a special vehicle hydraulic lifting process control system and method, and aims to solve the problems that in the prior art, a hydraulic system and a vehicle dynamics model cannot be deeply fused, load identification prediction and reinforcement learning optimization cannot be combined, system control precision and self-adaptive capacity are reduced, and system reliability is high. And safe, efficient and intelligent operation of the special vehicle under variable loads cannot be ensured. A hydraulic system and a vehicle dynamics model are deeply fused through the intelligent load regulation and control module, load recognition prediction and reinforcement learning optimization are combined, the system control precision and the self-adaptive capacity are remarkably improved, the module achieves accurate response to complex working conditions, the energy utilization efficiency and the operation stability are effectively improved, the system robustness is enhanced, and the system reliability is improved. And safe, efficient and intelligent operation of the special vehicle under variable loads is ensured.

The invention provides an impact rotary drilling hydraulic control system of a dinting machine, which belongs to the technical field of hydraulic control systems and comprises a variable pump, a pilot oil source control valve group, a proportional multi-way valve, a shuttle valve I, a one-way pressure reducing valve, a shuttle valve II, a drilling machine pilot handle group, an impact rotary drilling machine, a bidirectional hydraulic lock and a drilling machine feeding oil cylinder. According to the hydraulic control system for percussive rotary drilling of the dinting machine, the percussive rotary drilling machine can perform stepless speed regulation between two speeds, high-frequency percussive or low-frequency percussive operation can be flexibly used according to rock stratum and geological working conditions, the application range of equipment is greatly widened, and the hydraulic control system can be used for rock stratums with high hardness, weathered rock stratums and hard and brittle geology. And during low-frequency impact operation, one-key linkage operation can be realized, namely, the functions of feeding, rotating and impacting of the drilling machine can be completed by operating the impact pilot handle.

The utility model discloses a hydraulic logic control system for a sidesway distance adjusting fork. Comprising an oil pump, a safety valve, a first reversing valve plate, a logic control valve block, a first hydraulic control one-way valve, a first three-way pipe, a right pallet fork distance adjusting oil cylinder, a left pallet fork distance adjusting oil cylinder, a first overload valve, a second hydraulic control one-way valve, a second three-way pipe, a third three-way pipe, a third hydraulic control one-way valve, a throttling valve, a second reversing valve plate and a second overload valve. The logic control valve block comprises a second hydraulic control one-way valve, a third hydraulic control one-way valve, a throttling valve and a second overload valve, and the second hydraulic control one-way valve, the third hydraulic control one-way valve, the throttling valve and the second overload valve are communicated through pipelines. And the first reversing valve plate is communicated with the second reversing valve plate. According to the hydraulic logic control system for the laterally-moving distance adjusting fork, the purpose of hydraulic oil way regulation and control is achieved through the arrangement of the structure.

The invention relates to the technical field of hydraulic control one-way valve testing, and discloses a hydraulic control one-way valve testing method which is used for solving the problem that the real performance of a hydraulic control one-way valve under actual complex working conditions is difficult to comprehensively reflect due to the fact that an existing testing method is single in working condition, insufficient in data acquisition dimension and lack of dynamic modeling capacity. A programmable working condition loading module is introduced, a hydraulic test environment with dynamic characteristics is constructed according to a pressure and flow change curve in practical application, and high-precision and multi-dimensional synchronous acquisition of the whole opening and closing process of the hydraulic control one-way valve is realized by combining a high-frequency displacement sensor, a micro-flow sensor and a vibration sensing unit; according to the scheme, the defect that a traditional testing method is difficult to restore the real dynamic working condition is effectively overcome, the authenticity of valve performance testing and the detail integrity of response data are remarkably improved, and powerful support is provided for accurately evaluating the dynamic behavior of the hydraulic control one-way valve under the complex working condition.