2104 results about "Hydraulic control" patented technology

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.

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 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 discloses an electrical control device for high-pressure protection in a hydraulic control system, which relates to the technical field of hydraulic control and comprises a high-pressure detection module for monitoring pressure data of the hydraulic system in real time and transmitting the pressure data to a control processing core through an analog quantity input module. Two-channel independent control logic is adopted through the redundancy protection unit, even if a single loop breaks down, the other loop can still independently execute a safety instruction, the risk of single-point failure is eradicated, meanwhile, the intelligent control unit achieves advanced and accurate pressure adjustment and trend suppression through a high-frequency-response electro-hydraulic servo valve and a proportional valve and depending on bus communication, and the safety performance of the system is improved. The high-voltage risk is eliminated in the bud, the leap from passive response to active protection is achieved, high system integration and intelligent management are achieved through the intelligent valve terminal, remote monitoring and diagnosis are supported while wiring is simplified, and maintainability is enhanced.

The invention discloses a land leveler automatic control and guidance method and system based on Beidou high-precision positioning. The method comprises the following steps: acquiring comprehensive state information of a land leveler including a three-dimensional position, a course, an attitude and a real-time elevation of a scraper knife; outputting future state parameters of a scraper knife elevation adjusting mechanism and a machine body steering mechanism of the land leveler in the rolling time domain through a preset land leveler kinematics model on the basis of the comprehensive state information and the current target working plane design information; based on the future state parameters, determining an optimal pre-control instruction sequence for a scraper knife elevation adjusting mechanism and a fuselage steering mechanism through a multi-objective optimization mode; and the optimal pre-control instruction sequence is sent to an electro-hydraulic control system to drive an execution mechanism to act. Complex factors such as topographic changes and fuselage dynamics coupling can be effectively coped with by predicting future states by adopting a kinematic model and prospectively generating a coordination control instruction, and the accuracy and smoothness of scraper knife control in the dynamic operation process are ensured.

The invention discloses an intelligent forming system for gradient forming of a photovoltaic support. The intelligent forming system comprises a gradient stiffness optimization module, a sectional type hydraulic control module, a springback prediction compensation module and a temperature compensation module. The gradient stiffness optimization module realizes variable thickness optimization design of the bracket in the length direction through a variable cross-section beam theory and a discretization optimization method; the sectional type hydraulic control module achieves accurate tracking of pressure and displacement in the sectional forming process through synchronous coordination control of a plurality of hydraulic cylinder units. The springback prediction compensation module predicts elastic springback in the forming process based on residual stress analysis and a geometric deformation theory and carries out real-time compensation; the temperature compensation module corrects material parameters and dynamic characteristics of the hydraulic system by monitoring the environment temperature and the mold temperature in real time. The four algorithm modules achieve deep coupling through parameter interaction and feedback control, an integrated intelligent forming technical scheme is formed, and the bearing capacity, the forming precision and the production efficiency of the photovoltaic support are remarkably improved.

The invention discloses an electro-hydraulic control underground adjustable angle device and an adjusting method thereof. A translation assembly and a rotating assembly in a shell assembly are sequentially arranged from outside to inside, a sliding sleeve of the translation assembly slides in the axial direction of a shell of the shell assembly, and a spiral rod of the rotating assembly is matched with the sliding sleeve through a spiral key to achieve rotating movement and axial movement of the spiral rod; the lower end of the rotating assembly is meshed with the rotating joint assembly through a spherical gear to realize rotation of a rotating joint; the lower end of the shell is connected with the rotary connector through a gear ring, and the included angle between the axis of the gear ring and the vertical axis of the shell is larger than 0 degree. The device has the advantages of being simple in structure, convenient to operate, reliable in performance and high in structure bending angle adjustment control precision; the bend angle is adjusted underground, the requirement for track control of a well with a complex structure is met, and the purpose of completing drilling track control of the well with the complex structure with low cost, high efficiency and high precision is achieved.

The invention provides a deepwater semi-submersible drilling platform pressure control drilling MPD control system which comprises a platform rotary table face. A platform wellhead flow divider, a marine riser expansion joint, a marine riser tension ring, a marine riser rotation control pup joint, an MPD hydraulic control pup joint, an MPD marine riser annulus sealing device, a marine riser four-way joint, a drilling marine riser, an underwater blowout preventer set and a seabed underwater wellhead are sequentially connected to the platform rotary table face from top to bottom. The MPD hydraulic control pup joint is connected with a rotary control pup joint power unit through an umbilical cable I, an umbilical cable roller frame I and a cable hose, and the rotary control pup joint power unit is connected with a deepwater MPD electro-hydraulic control system main control station; the MPD marine riser annulus sealing device is connected with the annulus sealing device and the buffer manifold hydraulic power unit through an umbilical cable II, an umbilical cable roller frame II and a cable hose and is connected with the deepwater MPD electro-hydraulic control system master control station; the throttling hydraulic power unit is connected with the deepwater MPD electro-hydraulic control system master control station. According to the system, pressure regulation and control, equipment management and operation safety guarantee in the deepwater pressure-controlled drilling well are realized.

The invention relates to the field of aircraft hydraulic control element machining, and particularly discloses an aircraft hydraulic kinematic pair valve element lubricating structure laser surface texturing method which comprises the steps of lubricating spherical crown texture design, texturing machining path, protection cleaning, laser parameter testing, laser machining pretreatment, test piece texturing and texturing effect inspection. Machining of the micro-nano structure on the surface of the valve element of the hydraulic kinematic pair of the airplane is achieved through high-energy and short-pulse femtosecond laser, machining precision is high, controllability is high, environmental pollution is small, and compared with the prior art, abrasion of the matching face of the valve element and the cylinder sleeve kinematic pair can be reduced to a great extent; and meanwhile, high-pressure shock waves induced by femtosecond laser are utilized to form residual compressive stress on the surface of the valve element, so that oil and scrap storage and surface lubrication wear resistance of the surface of the valve element are synergistically improved, and the overall service life of the aircraft hydraulic control element is prolonged.

The invention relates to the technical field of hydraulic control, and discloses a hydraulic motor constant torque self-adaptive PID (Proportion Integration Differentiation) control system which comprises a controller and a hydraulic driving unit, the controller performs frequency domain separation on the pressure signal by using a signal preprocessing module, and extracts an average pressure difference representing the driving force and a ripple amplitude representing the fluid rigidity; the state observation module estimates an instantaneous volume elastic modulus based on the ripple amplitude, corrects a compression item in a flow continuity model by using the elastic modulus, and calculates an instantaneous leakage coefficient of the motor in real time; the self-adaptive control module establishes dynamic mapping of PID gain and physical parameters, the proportional gain is adjusted by using a leakage coefficient to match system damping, the integral gain is adjusted by using a volume elastic modulus to adapt to inherent frequency, and a control instruction is synthesized by combining feedforward compensation. According to the method, the problem of model mismatch caused by oil characteristic change and motor abrasion is effectively solved, and the whole-life-cycle control precision of the system is improved.

The invention relates to the technical field of hydraulic valves, and discloses an integrated safety hydraulic control one-way valve integrated with a tail beam telescopic cylinder, which comprises a valve body, a through main channel arranged in the valve body and a valve core assembly arranged in the main channel, the valve core assembly comprises a joint valve sleeve, a valve core spring, a valve core, a valve seat, a liquid inlet valve sleeve, an ejector rod spring and an ejector rod, the valve seat is arranged between the connector valve sleeve and the liquid inlet valve sleeve, the valve element is arranged in an inner cavity of the connector valve sleeve in a sliding mode, and the ejector rod is arranged on the axis extension line of the valve element. The valve element is of a primary-secondary valve structure and comprises a main valve element and a pilot valve element coaxially arranged in the main valve element, an axial guide inner cavity is formed in the center of the interior of the main valve element and comprises a damping cavity and a conical surface plugging cavity, and a pilot valve channel is formed in the wall of the damping cavity. The problem that a valve element of a traditional hydraulic control one-way valve rapidly moves at the hydraulic control opening moment to generate severe mechanical impact is solved, and the service life of a valve set is prolonged.

The invention relates to the technical field of design of an air suction prevention scheme for a hydraulic rocker gear oil cooling circulating pump of a coal mining machine, in particular to an air suction prevention method for the hydraulic rocker gear oil cooling circulating pump of the coal mining machine and the coal mining machine. Aiming at the problem of air suction damage of a circulating pump caused by change of the inclination angle of the rocker arm, oil suction ports are formed in the lowest liquid level positions of the positive and negative inclination angles of the rocker arm respectively, the inclination angles are monitored in real time through an angle sensor, and an electric control box controls an electric proportional reversing valve to act according to inclination angle signals and drives a hydraulic control reversing valve to be switched to a corresponding working position. And the gear oil circulating pump is always communicated with the current lowest liquid level oil suction port. According to the scheme, the pumping air corrosion risk is thoroughly eliminated, the service life of the pump body and the gear set is prolonged, and meanwhile system energy consumption is reduced. According to the preferable scheme, the filter and the cooler are integrated to form a closed-loop purification cooling loop, and the cleanliness and the thermal stability of the oil are further guaranteed. According to the invention, the adaptability defect of the fixed oil suction port under the dynamic dip angle working condition is overcome, and reliable guarantee is provided for high-load continuous operation of the coal mining machine.

The invention discloses a closed-loop control method for a hydraulic control butterfly valve of a PCCP (prestressed concrete cylinder pipe) long-distance high-pressure water conveying pipeline, and belongs to the technical field of long-distance high-pressure water conveying pipeline control. The problems that in the prior art, due to manual scheduling or single-point PID control, a long-distance PCCP water conveying system has response lag and lacks global cooperation, the water attack risk is difficult to effectively deal with, and the optimal overall energy consumption of the system cannot be considered are solved. According to the invention, by constructing a hierarchical control architecture in which a distributed measurement and control network is coordinated with a central supervision control and data acquisition system platform, a variable-parameter PID control algorithm is built in an equipment PLC, so that millisecond-level identification and active suppression of a sudden water attack working condition are realized; a hydraulic simulation model and a multi-objective optimization algorithm are deployed in a central supervision control and data acquisition system master station, and a whole-line optimal pressure set value is solved through iterative calculation and is issued to each PLC for execution, so that the system energy consumption minimization is realized on the premise of ensuring the pipeline safety.

The invention discloses a harvester header height pre-judgment type adjusting system and method and a harvester, and relates to the technical field of harvester header height adjusting.In the system, a look-ahead sensing module is used for detecting terrain data in real time and generating a terrain profile map according to the terrain data in front of the harvester; the multi-parameter acquisition module is used for acquiring the vehicle speed of the harvester and the crop density and crop humidity data in front of the harvester in real time; the central control module is used for receiving and performing multi-parameter fusion and pre-judgment control on the terrain profile map, the vehicle speed, the crop density and the crop humidity data to generate a hydraulic control instruction; the hydraulic execution module is used for receiving the hydraulic control instruction and adjusting the header height of the harvester according to the hydraulic control instruction. According to the method, the problems of sensing range limitation and hydraulic delay are solved through terrain change pre-judgment and multi-parameter fusion control, and the harvesting quality and the operation efficiency under the complex working condition are improved.

The invention discloses a new material plastic bucket tensile yield strength detection device, and relates to the technical field of new material plastic bucket detection, the new material plastic bucket tensile yield strength detection device comprises a workbench and a positioning assembly, the top of the workbench is provided with a rack, the top of the rack is provided with a hydraulic cylinder, and the bottom of the hydraulic cylinder is provided with a driving rod; the positioning assembly is arranged on the outer side of the middle of the driving rod and comprises a fixing ring, the fixing ring is fixed to the outer side of the middle of the driving rod, and a limiting plate is arranged on the peripheral face of the fixing ring. In the process that the driving rod is hydraulically controlled to apply force, self-locking clamping operation of the top of the barrel body can be synchronously triggered, a pressure sensor and an infrared distance sensor cooperatively monitor displacement deformation of the bottom of the barrel, mechanical characteristics of a yield point and a fracture point are accurately captured, and automatic detection of the yield strength and the tensile strength of the plastic barrel is achieved through the design; meanwhile, the clamping operation of the plastic bucket is automatically relieved along with resetting of the hydraulic cylinder, and the tensile yield strength detection efficiency of the new material plastic bucket is remarkably improved.

A hydraulic circuit includes a first oil path, a second oil path, a hydraulic control circuit, a third oil path, a check valve, and a relief valve. The first oil path links to a discharge port of a first oil pump. The second oil path links to a discharge port of a second oil pump. In the hydraulic control circuit, a first regulator valve is disposed downstream of a confluence point of the first oil path and the second oil path. The third oil path connects a suction port of the first oil pump and a strainer. The check valve is provided in the third oil path and restricts a movement of oil toward the strainer side. The relief valve is provided in the third oil path and discharges oil in the third oil path to an outside when a pressure in the third oil path exceeds a reference pressure.

The application provides a two-position five-way pneumatic reversing valve, and relates to the technical field of hydraulic control valves.The valve body is provided with a first air outlet hole, an air hole and a second air outlet hole from left to right on the lower side, and the inner cavity of the valve body is provided with a valve core.The left end of the valve body is provided with a front baffle, and the right side of the valve body is provided with a piston assembly, which is in contact with the right end surface of the valve core.The valve body is provided with a first annular protrusion, a second annular protrusion, a third annular protrusion, a fourth annular protrusion and a fifth annular protrusion corresponding to each hole.The outer side of the air hole is provided with a plug A, and the air hole is connected with the piston assembly through a pipeline arranged in the valve body.The pipeline is internally provided with a plug B.The electromagnetic structure of the application is integrated, and the parts have better coaxiality during production and assembly, effectively ensuring the service life of the product and the extremely low product failure rate.Compared with the existing split structure, the application has higher electromagnetic conversion efficiency and can effectively reduce the power consumption of the product.

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 embodiment of the invention provides a battery pack connecting structure and an automobile. Relates to the technical field of automobiles. The battery pack connecting structure comprises a battery pack and a plurality of connecting assemblies, wherein a mounting beam is arranged on the battery pack; the connecting assembly comprises a first connecting piece, a second connecting piece, a hydraulic control piece and at least one limiting piece, the first connecting piece is used for being connected with the vehicle body, the second connecting piece is used for being connected with the mounting beam, part of the first connecting piece is inserted into the second connecting piece, and the limiting piece is slidably connected to the first connecting piece and is configured to be connected with the hydraulic control piece. The first connecting piece can be partially moved out to be clamped with the second connecting piece; the hydraulic control piece is connected with the first connecting piece and used for adjusting the limiting piece to be separated from the second connecting piece when the battery pack is subjected to thermal runaway. By means of the battery pack connecting structure, damage to people on the vehicle when the battery pack is in thermal runaway is reduced.

The invention belongs to the technical field of seismic exploration, and particularly relates to a coal mine underground hydraulic hammering type controllable seismic source vehicle device. The device comprises a crawler, a rotating platform and a hydraulic hammering system, the rotating platform, a four-column type lifting hydraulic support installed on the rotating platform and a hydraulic support in the hydraulic hammering system are hydraulically controlled, and the hydraulic hammering system can conduct 360-degree horizontal rotation, height stepless adjustment and horizontal stretching and retracting. And meanwhile, the crawler-type vehicle body and remote control operation are adopted, so that the crawler-type underground coal mine hammering vehicle is suitable for a complex walking environment in an underground coal mine, and the construction efficiency and the safety are improved.

The invention discloses a crane falling and amplitude variation control method and device, electronic equipment and a storage medium. The crane falling and amplitude changing control method comprises the steps that current working condition information of a crane is obtained; on the basis of a pre-generated four-dimensional feed-forward control model, a feed-forward control current value is calculated according to the current working condition information, and the four-dimensional feed-forward control model represents the mapping relation between the working condition information and the main arm descending valve control current of the crane in the constant-speed descending state; the actual descending speed of the main arm of the crane is obtained and compared with the set expected descending speed, and a closed-loop correction current value is calculated through a closed-loop control algorithm based on the speed error; and superposing the feedforward control current value and the closed-loop correction current value to obtain a total control current, and outputting the total control current to a main arm descending valve of the crane so as to control the descending speed of the main arm of the crane. According to the invention, the descending process of the main arm is stable and constant in speed, and the stability and safety of the hydraulic control crane in the amplitude variation action are improved.

The technical scheme belongs to the technical field of wood splitting devices, and particularly relates to a wood splitting machine which comprises a rack, a baffle, a wood splitting axe, a two-way rapid oil cylinder and a power unit. The two-way quick oil cylinder and the baffle plate are arranged on the rack; the wood breaking axe is installed at the driving end of the two-way rapid oil cylinder, the wood breaking axe is S-shaped, wood can be split more easily, and a working space used for containing the wood is formed among the rack, the baffle and the wood breaking axe; the power unit is integrated on the rack to provide oil pressure for the two-way rapid oil cylinder; the hydraulic control switch valve and the control valve are stacked and integrated into a whole through the two-way rapid oil cylinder. The main beam is arranged on the machine frame, the tail end of the main beam is bent and upwarped, the tail plate is embedded and welded to the tail end of the main beam, the reinforcing plates are arranged on the two sides of the tail plate, the main beam is formed by cutting an integral sectional material, and compared with a traditional main beam formed by welding three plates, machining procedures of the main beam are reduced; and the bent guide plate is additionally arranged between the baffle and the sliding rail on the main beam, so that the strength of the baffle is improved while residual wood grid chippings are conveniently cleaned.

The invention relates to the technical field of casting post-processing, and provides a variable-diameter metal mold and casting separation device which comprises a base assembly, a clamping assembly, an ejection assembly and a hydraulic control assembly, the clamping assembly comprises a clamping plate, a clamping oil cylinder and a rotating shaft, the rotating shaft penetrates through a rotating shaft hole in the clamping plate, a cylinder body of the clamping oil cylinder is hinged to the base assembly, and the ejection assembly is arranged on the base assembly. A first piston rod on the clamping oil cylinder is hinged to a hinge seat on the clamping plate, the hydraulic control assembly controls the clamping oil cylinder to drive the clamping plate to rotate around a rotating shaft so as to achieve opening and closing to clamp or loosen a casting mold, and the ejection assembly is arranged on the base assembly and controlled by the hydraulic control assembly so as to eject and separate a casting from the casting mold. Rapid and stable clamping of metal casting molds with different diameter specifications and stable and efficient ejection and separation of castings can be achieved, operation is convenient and fast, and adaptability is good.

The numerical control surface grinding, chamfering and rounding all-in-one machine comprises a machining all-in-one machine, a machining bin is formed in the upper left corner of the front end of the machining all-in-one machine, a bin door is connected to the upper side of the front end of the machining all-in-one machine in a sliding mode, and the bin door can slide to the front end of the machining bin for shielding. Storage mechanisms are arranged on the left side and the right side of the inner wall of the lower end of the machining bin correspondingly, a plurality of chamfering and rounding grooves with different inner diameters are formed in the cylindrical outer wall of a chamfering and grinding wheel, and the edge of a silicon wafer can be chamfered and rounded at different angles; chamfering rounding grooves with different inner diameters can be adjusted to be clamped at the two ends of a silicon wafer to meet different machining requirements, stretching and retracting between a clamping telescopic rod and a telescopic sliding sleeve are controlled through a hydraulic control mechanism, the clamping position and tightness can be controlled according to the radius of the silicon wafer, the chamfering rounding device is suitable for machining of the silicon wafers with different radiuses, the machining range is widened, and the machining quality is improved.

The invention provides a coal mill oil way plate and a reversing control device thereof, and relates to the technical field of coal mill oil way plates, the coal mill oil way plate comprises a valve block body, a proportional overflow valve, a duplex electromagnetic reversing valve group, a working oil way group, two hydraulic control one-way valve groups, two energy accumulators, a safety overflow valve, an online particle counter and a spiral cooling flow channel. The redundancy design of the duplex electromagnetic directional valve group improves the reliability of the system, so that the system can still be operated when a single valve fails, the hydraulic control one-way valve group realizes mechanical locking of an oil cylinder and can prevent a grinding roller from falling off during power failure, and the energy accumulator is connected with a working oil duct through a connector to absorb pressure impact and compensate leakage, so that the stability of loading pressure is maintained, and the reliability of the system is improved. The on-line particle counter gives an early warning of oil pollution in real time, hydraulic faults can be reduced, the spiral cooling flow channel is matched with the semiconductor temperature control piece to adjust the oil temperature, and the problem of pressure drift caused by oil viscosity fluctuation under high and low temperature working conditions is solved.

The invention provides a bearing load real-time monitoring and hydraulic pressure self-adaptive adjusting system and method, and the system comprises a signal sensing unit which is used for collecting a bearing vibration signal, a hydraulic system pressure signal and a main shaft rotating speed signal; and the signal processing and calculating unit is connected with the signal sensing unit and is used for processing the collected signals, estimating the bearing load based on a pre-trained soft measurement model and generating a hydraulic control instruction. The dependence of traditional bearing load monitoring on an expensive force sensor is broken through, and by integrating operation signals such as vibration, hydraulic pressure and rotating speed which are easy to obtain, the bearing load monitoring precision is improved. According to the method, the incidence relation between signals and loads is established through off-line modeling, non-intrusive load real-time estimation is achieved, meanwhile, feed-forward and feedback composite control is adopted, hydraulic pressure is adjusted in a self-adaptive mode according to the estimated loads, traditional empirical fixed setting is replaced, monitoring, adjusting, early warning and maintenance prompting functions are integrated, and real-time monitoring is achieved. The technical problems that a traditional scheme is high in cost, blind in adjustment and dispersed in function are effectively solved.

The utility model discloses an integrated bidirectional hydraulic pump station for a car arrester in a tank, which comprises a valve block, a bidirectional hydraulic pump, a motor, an oil tank, a car arrester driving oil cylinder, overflow valves and one-way valves, a left oil way and a right oil way are arranged in the valve block, the left oil way is provided with a first overflow valve, a first one-way valve and a fifth one-way valve, and the fifth one-way valve is a hydraulic control one-way valve. A second overflow valve and a second one-way valve are installed on the right oil way, and the second one-way valve is a hydraulic control one-way valve and is controlled by the oil pressure of the left oil way; an oil port A1 of the two-way hydraulic pump is connected with a piston cavity oil port of the car arrester driving oil cylinder through a left oil way, and an oil port B1 of the two-way hydraulic pump is connected with a piston rod cavity oil port of the car arrester driving oil cylinder through a right oil way. The left oil way is connected with the oil tank through a fifth one-way valve, and the fifth one-way valve is used for releasing additional backpressure generated in a piston cavity in the process that the two-way hydraulic pump drives a piston rod of the car arrester driving oil cylinder to retract. According to the utility model, the power consumption is reduced, the energy is saved, and the reliability of the system is improved.