2614 results about "Hydraulic motor" patented technology

The invention discloses a hydraulic motor fault diagnosis method and system based on heterogeneous asynchronous data fusion, and the method comprises the steps: collecting heterogeneous asynchronous data of a sensor network, carrying out the preprocessing of the data, inputting the data into a parallel dynamic pruning residual network, extracting features, and carrying out the preliminary fusion, thereby obtaining an initial feature plane; and inputting the initial feature plane into a multi-connection neural network, fusing data, extracting features, obtaining a final feature plane, using the fused feature data as a training set, and building a feature classification model to test and evaluate the performance of the feature classification model. According to the method, the limitation of a traditional fusion model in asynchronous processing of high-frequency vibration signals and low-frequency thermodynamic data of a hydraulic system is effectively overcome, the robustness of key fault features in a strong noise environment is remarkably improved, and rapid virtual-real mapping of bench test simulation data and online monitoring data is realized; typical faults such as plunger pair abrasion and valve plate cavitation of the hydraulic motor can be accurately supported, and safety guarantee is provided for equipment life prediction and safety control.

The invention discloses a hydraulic control system, which belongs to the field of hydraulic control, and comprises a power execution module, a control regulation module and a sensing feedback module, in the slurry manufacturing stage, data are collected through a sensor, the abnormal condition of the slurry temperature is detected to judge whether the slurry temperature is adjusted or not, and based on the real-time slurry viscosity, the rotating speed of a stirring shaft is adjusted in a self-adaptive mode by adjusting the hydraulic flow of a hydraulic motor of a stirring driver; acquiring driver data to monitor a control instruction implementation result, performing abnormality evaluation analysis on a driver through threshold judgment and abnormality score calculation, and generating an updated driver control signal after a driver instruction regeneration signal is received; monitoring abnormal conditions of data acquired by various deployed sensors, monitoring abnormal data of the sensors, and monitoring duration of the abnormal data so as to carry out abnormal early warning and generate abnormal early warning information; the problem that the slurry temperature of die-casting equipment under hydraulic control is difficult to adaptively adjust and disturb is solved.

The invention discloses a closed monitoring control system for a hydraulic motor. The closed monitoring control system comprises the hydraulic motor, a main pump, an oil tank, a control loop and a monitoring module, the main pump is suitable for pumping oil in the oil tank to the hydraulic motor so that the hydraulic motor can convert hydraulic energy into mechanical energy to be output. The monitoring module is suitable for detecting the working state of the hydraulic motor, and the control loop is suitable for controlling the displacement of the main pump according to the detection result of the monitoring module. The control method has the beneficial effects that the working state of the hydraulic motor is detected, and the working state of the main pump is controlled according to the detection result, so that when the hydraulic motor is abnormal, the output rotating speed of the hydraulic motor can be reduced in time or the hydraulic motor is directly shut down, and the operation safety of the hydraulic motor can be effectively guaranteed.

The invention discloses a universal multifunctional obstacle crossing vehicle body system for a deep-sea mining vehicle. The universal multifunctional obstacle crossing vehicle body system comprises a main vehicle frame, a hydraulic suspension system and an independent driving system. The hydraulic suspension system comprises a main supporting hydraulic push rod, an upper vehicle body and lower vehicle body connecting frame, an L-shaped driving system connecting frame, hydraulic steering push rods on the two sides, a steering wheel, a steering wheel bottom fixing piece, a spherical higher pair connecting shaft, a driving system universal connector and a corresponding hydraulic control loop. The independent driving system comprises a track system, a box body, a pitching hydraulic motor, a driving motor, an auxiliary bearing wheel and an auxiliary tensioning wheel set. Compared with a traditional crawler-type chassis, the universal obstacle crossing chassis provided by the invention has better obstacle crossing ability and flexibility, and can cope with more complex seabed conditions. And meanwhile, the universal chassis can adapt to different types of working environments by replacing different types of independent driving modules, so that the universal chassis has excellent multi-terrain adaptability. By means of the universal vehicle chassis, the passing rate and the working efficiency of various deep-sea mining devices in the complex seabed environment can be well improved.

A hydraulic vibration generation device or hydraulic motor is provided. The device includes a manifold having an inner volume with a pressure chamber formed in the inner volume, a fluid inlet orifice and a fluid outlet orifice. The device further includes a vibration generating member having a grooved drive and an off-center weight and retaining plates. The inner volume receives the vibration generating member within it. The vibration generating member rotates and generates vibration in response to hydraulic fluid flowing into the manifold through the inlet orifice and directed through the pressure chamber, relieves pressure upon exiting the pressure chamber into a pressure relief channel and out of the manifold through the outlet orifice. Also provided a hydraulic motor with a same manifold and pressure chamber, but with a power generating member having the same groove drive without an off-center weight. Rotation of the power generating member generates power.

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 invention relates to the technical field of film crushing, and discloses a film crushing device which comprises a box body, a feeding port is formed in the front face of the box body, two electric crushing rollers are arranged in the box body, a discharging port is formed in the bottom of the box body, and a dust removal mechanism is arranged at the top of the box body. The hydraulic motor drives the transmission shaft to rotate to drive the fan to suck flying dust generated by film breaking in the box body into the air outlet pipe and discharge the flying dust into a factory waste gas treatment system, so that the dust is prevented from overflowing to pollute the working environment. The filter screen prevents film fragments from entering the air outlet pipe, and normal operation of the waste gas treatment system is guaranteed. Meanwhile, when the transmission shaft rotates, a cam pushes a movable plate to drive a scraper to move left and right to clean film fragments adsorbed at the bottom of the filter screen; the spherical ejector block, the spiral sliding rail, the support and the first spring are matched with one another, so that the ejector pin is inserted into the filter hole to eject blocked impurities, smoothness of the filter screen is guaranteed, a good dust removal effect is maintained, and stable operation of equipment is guaranteed.

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 invention provides a hydraulic motor working state detection method and device and a storage medium, and relates to the technical field of fault detection.The method comprises the steps that a sensor cluster is arranged at key nodes of a hydraulic motor, and a multi-dimensional monitoring data set is constructed; calculating displacement data of a hydraulic motor and kinematic viscosity data of hydraulic oil according to the multi-dimensional monitoring data set to obtain a global monitoring data set; the actual leakage amount of the hydraulic motor is calculated based on the global monitoring data set, and an operation mode switching instruction is generated; receiving the load monitoring instruction or the shutdown maintenance instruction, starting multi-mode fault diagnosis, and obtaining a fault cause set of the hydraulic motor by using a Bayesian network model; and determining a maintenance scheme according to the fault cause set of the hydraulic motor. The technical problems that in the prior art, hysteresis exists, effective preventive detection measures are lacked, potential problems possibly existing in a hydraulic motor cannot be found in time, the maintenance cost is high, and the equipment recovery difficulty is large are solved.

A hydraulic motor output shaft vibration detection device disclosed by the present invention is characterized in that a limiting piece and a driving piece are sequentially installed in a detection box from top to bottom, a memory pointer is installed on the limiting piece, a main pointer is installed on the driving piece, and a contact rod is installed at the lower end of the detection box in an up-down sliding manner; the upper end of the contact rod extends into the detection box and is connected with the driving part, a limiting structure used for limiting the limiting part is installed in the detection box, an unlocking part is installed on the surface of the rear side of the detection box, and the limiting structure is in sliding connection with the unlocking part. The memory pointer is connected with the limiting structure through the limiting piece, the main pointer can detect the corresponding amplitude when the output shaft of the hydraulic motor rotates in real time, the memory pointer can record the maximum amplitude when the output shaft of the hydraulic motor rotates, instant recording of the amplitude is facilitated, and a recorder can clearly see the current vibration value and the maximum peak value at a glance.

The invention provides a hydraulic jet staged fracturing tool for a horizontal well, and belongs to the technical field of horizontal well fracturing tools. The multiple spraying assemblies are arranged on the peripheral wall of the oil pipe, and the spraying assemblies can be adjusted at any rotation angle around the peripheral wall of the oil pipe; a plurality of packers are fixed to the peripheral wall of the oil pipe, a hydraulic motor is fixed to the right end of the oil pipe, a rubber scraping disc is fixed to an output shaft of the hydraulic motor, and a crushing assembly is arranged on the rubber scraping disc. The device has the advantages of being capable of achieving large-scale perforation operation through a small number of jet holes and the like, and the problem that in the prior art, a device is inconvenient to conduct large-scale perforation operation is solved.

The invention discloses an integrated electro-hydraulic driving unit of a marine anchor and mooring machine. The integrated electro-hydraulic driving unit comprises an oil supplementing system, a main driving system, a control system, a safety system and a hydraulic motor, an oil supplementing pump in the oil supplementing system is connected with an oil drainage tank and communicated with a pressure oil tank in the main driving system, the pressure oil tank is communicated with a main pump in the main driving system through two third one-way valves, a port A and a port B of the main pump are communicated with a port A and a port B of a hydraulic motor respectively, and one ends of two safety valves in the safety system are connected with the port A and the port B of the main pump respectively. The other ends of the two safety valves are connected in parallel to a pipeline between the oil outlet of the pressure oil tank and the inlets of the two third one-way valves; a controller of the control system is in electric signal connection with the main motor; and an output shaft of the hydraulic motor is connected with an input shaft of the anchor windlass. Therefore, according to the design, the hydraulic pump station, the control valve and the hydraulic motor can be integrated, and the integration degree is high.

The invention relates to an underground engineering surrounding rock instability process simulation test system under a deflection stress field. The system comprises a base, a guide rail, a front cover frame, a rear cover frame, a servo loader, a loading frame, a loading plate, a hydraulic motor, a gear and the like. A plurality of hydraulic loading devices are arranged on the inner surface of a concentric-square-shaped loading frame in the test system, active loading in different directions is provided for a test model, and a chamber surrounding rock stress field is simulated. And a plurality of groups of loading devices are arranged along the inner surface of the loading frame to form a circular loading mechanism. The test model is a circular sample, the test model is driven by a motor to deflect through three surrounding hoops on the surface, the front cover frame and the rear cover frame are connected through a penetrating pull rod and a hydraulic nut, and front and rear face passive constraint is provided for the test model. The simulation test system can realize an underground engineering surrounding rock instability whole-process similar simulation test under stress deflection environment conditions such as different stress field intensities, different included angles between a stress main shaft and a chamber orientation, stress field stress main shaft static and dynamic deflection and the like.

The invention discloses a hydraulic motor abrasion monitoring method and system, and belongs to the technical field of abrasion fault prediction.The method specifically comprises the steps that multi-dimensional data signals of a hydraulic motor are collected in real time and preprocessed; the preprocessed multi-dimensional data of the hydraulic motor are processed, the early wear characteristics of the hydraulic motor are extracted, and the processing comprises decomposition of the preprocessed multi-dimensional data of the hydraulic motor, construction of a decomposition tree, reservation of nodes with preset frequency in the decomposition tree, and reconstruction, difference calculation and window moving average suppression of the reserved nodes; fusing the early wear characteristics of the hydraulic motor, and generating a comprehensive health index through a dimension reduction algorithm; judging whether the hydraulic motor has early-stage fine wear or not according to the comparison of the comprehensive health index and a dynamic threshold value, and giving an alarm according to a judgment result; according to the method, early-stage fine wear signs of the hydraulic motor can be found, a maintenance plan is made in advance, and production interruption caused by sudden equipment failures is avoided.

The invention relates to the technical field of industrial water treatment equipment, and discloses an intelligent flushing self-cleaning filter system for industrial water treatment. A dynamic suspended matter monitoring module of the system collects three-dimensional distribution data of deposits on the surface of a filtering medium in real time, and mixed deposition characteristics of suspended solids and oil stains are recognized through a multispectral imaging technology; the differential pressure trigger control module establishes a mapping relation between sediment thickness and fluid resistance according to the three-dimensional distribution data, and generates a cleaning trigger instruction when the real-time differential pressure data reaches a dynamic threshold interval; the spiral trajectory planning module analyzes the cleaning trigger instruction, and generates a composite motion trajectory containing a rotation angular velocity and an axial displacement rate in combination with the current position of a suction nozzle and a filter screen topological structure; the multi-mode flushing execution module synchronously adjusts torque output of a hydraulic motor and linear displacement of a piston cylinder based on the composite motion trail, so that a suction nozzle covers the whole effective filtering area of a filter screen along a spiral path.

The invention relates to the technical field of chassis, and discloses a crawler-type rotary drilling rig chassis which comprises a rotary drilling rig chassis right beam and a rotary drilling rig chassis left beam, and driving wheel mounting positions are arranged at one end of the rotary drilling rig chassis right beam and one end of the rotary drilling rig chassis left beam. Guide wheel mounting positions are arranged at the other ends of the rotary digging drill chassis right beam and the rotary digging drill chassis left beam; hydraulic motor mounting shaft holes for mounting hydraulic motors are formed in the surfaces of the driving wheel mounting positions; and the rotary drilling rig chassis center bracket is arranged between the rotary drilling rig chassis right beam and the rotary drilling rig chassis left beam. In the actual use process, under the non-working condition, the left telescopic beam and the right telescopic beam are contracted to the shortest state, the size of the chassis is reduced, vehicle migration and transportation are facilitated, the transportation cost is reduced, the transportation time is shortened, meanwhile, under the working condition, the left telescopic beam and the right telescopic beam stretch out, the vehicle ground contact area is increased, and the operation stability and the equipment stability are improved.

The utility model discloses a track snow removing device which is characterized in that a track trolley frame is used as a bearing platform, four traveling wheels are mounted at the bottom of the track trolley frame, and the track trolley frame is connected with a motor vehicle through a car coupler; a snow removing shovel is connected to the forefront portion of the rail trolley frame and is in a V shape. A snow throwing fan is arranged behind the snow removing shovel and integrated with a snow collecting auger, and the top of the snow throwing fan is connected with a snow throwing barrel. A snow sweeping rolling brush is installed behind the snow collecting auger, and two rail surface deicing devices are installed between the snow sweeping rolling brush and the rear shaft walking wheels. An electric control system is arranged on the rail trolley frame and is connected with the motor vehicle through a quick-connection plug to take electricity; the hydraulic pump station is connected with the snow throwing fan, the snow collecting auger and a hydraulic motor installed on the snow sweeping rolling brush through a hydraulic pipeline. According to the multifunctional snow remover, the snow removing mode design integrating pushing, shoveling, sweeping and throwing is adopted, multiple functions are integrated, and the small and comprehensive function design is achieved; and the capital cost is reduced, and the operation efficiency is improved.

The invention discloses a high-precision continuous pressing forming device and method for a powder metallurgy blank with an inner sinking groove, and relates to the technical field of pressing forming of the powder metallurgy blank with the inner sinking groove. The high-precision continuous pressing forming device comprises a hydraulic motor fixedly arranged on the bottom surface of a workbench, and an output shaft of the hydraulic motor upwards penetrates through the workbench; and a rotating table supported on the table top of the workbench is fixedly arranged at the extending end, and a pressing assembly B and a pressing assembly A which are used for pressing metal powder are arranged at the left end and the right end of the rotating table correspondingly. The powder metallurgy blank pressing device has the beneficial effects that the powder metallurgy blank pressing quality is greatly improved, and the powder metallurgy blank pressing forming efficiency is greatly improved.

The invention relates to the technical field of motion control, and discloses a shield cutter changing robot motion control method based on closed-loop servo hydraulic control, which comprises the following steps: recording the start-stop times and the start-stop interval of a hydraulic motor; friction compensation is conducted on the hydraulic motor based on the start-stop times and the start-stop intervals, and the friction torque of the hydraulic motor is obtained; working parameters of the hydraulic motor are collected; comprehensive disturbance compensation is conducted on the hydraulic motor based on the working parameters, and the disturbance equivalent moment of the hydraulic motor is obtained; acquiring an actual rotation angle of the load; calculating a control voltage amount of a hydraulic motor based on the actual rotation angle, the friction torque and the disturbance equivalent torque of the load; and controlling the movement of the hydraulic motor load based on the control voltage amount. Through friction compensation and comprehensive disturbance compensation, accurate control over movement of the hydraulic motor is achieved.

A device and a method for changing the drill bits, tricone bits or DTH bits of drill strings on a drilling platform is describe herein, the device comprising an arm element (1) moveable in a rotating, vertical or horizontal manner. A post or supporting element (5) is connected to one of the ends of arm (1) and it is connected to arm (1) in such a way that it moves the arm. Element (5) serves as a base for arm element (1) and includes a drive unit (6)) allowing arm (1) to retract and extend in a controlled manner. A drill bit storage and receiving element (3) is at the other end of the arm (1), and element (3) has a rotating surface, in addition to having a hydraulic motor (7) or other type of motor to move same.

The utility model belongs to the technical field of hydraulic systems, and discloses a one-way valve and a hydraulic system. The one-way valve comprises a valve sleeve and a valve element, the valve sleeve is provided with a cavity and an oil inlet channel which are communicated, the valve element is arranged in the cavity in a sliding mode and can block the oil inlet channel, the valve element is provided with a first boss, the first boss and the inner wall of the cavity are arranged in a spaced mode to form a first filtering channel, and the first filtering channel is used for oil liquid to pass through; and at least part of impurities in the oil can be prevented from crossing the first boss. The one-way valve is simple in structure, impurities in oil can be filtered out, the situation that the impurities enter a controller after passing through the one-way valve, and consequently a valve element of the controller is blocked can be avoided, it is guaranteed that the variable displacement of the hydraulic motor can be normally adjusted, and the normal function of the hydraulic motor is guaranteed.

The invention belongs to the technical field of coal mine drilling robot control, and particularly relates to a full-autonomous drilling control system and method for a coal mine drilling robot, and the system comprises the coal mine drilling robot, a drilling load sensing module, a drilling process controller, and a drilling system installed on the coal mine drilling robot. The drilling system comprises a drill rod rotation module, a drill rod feeding module and a drill rod clamping module; the drill rod rotation module comprises a hydraulic motor and a speed reducer, and the hydraulic motor is responsible for lifting power and controlling the drilling speed; the drill rod feeding module comprises a hydraulic cylinder and a guide rail. The drill rod clamping module comprises a front vice and a rear vice. The drilling load sensing module comprises a drilling pressure sensor, a rotary encoder, a drilling displacement sensor and a drilling load solver, the drilling load solver classifies and defines drilling loads based on a support vector machine, and then drilling load sensing under different coal rock conditions is achieved.

The utility model relates to the technical field of underground drill rigs, in particular to a crawler-type full-hydraulic underground drill rig convenient to position, which comprises a drill rig chassis, a fixing frame is arranged at the top of the drill rig chassis and close to the left end, an adjusting seat is slidably connected to the inner side of the fixing frame, and an adjusting mechanism is mounted on the fixing frame. A lifting frame is arranged above the adjusting seat, a lifting mechanism is arranged at the bottom of the lifting frame, a control mechanism is arranged above the lifting frame and comprises a control frame and a guide frame, a hydraulic motor is arranged at the top of the guide frame, a drill rod is connected to the left side of the hydraulic motor, an annular laser device is arranged on the outer side of the drill rod, and the annular laser device is connected to the left side of the hydraulic motor. Supporting mechanisms are arranged on the front side and the rear side of the drilling machine chassis. According to the drilling machine, the whole drilling machine can be prevented from being adjusted, the adjusting process is rapid and convenient, the drilling position of the drilling rod is positioned and indicated through the annular laser, and the drilling accuracy of the drilling rod is guaranteed.

The invention relates to the technical field of intelligent manufacturing equipment, in particular to a turning machine tool and a turning method of a hydraulic motor output shaft. The turning machine tool comprises a rack, a drill chuck assembly used for clamping and fixing a workpiece is rotationally installed on the rack, and the drill chuck assembly is driven by a driving device arranged on the rack to rotate; a tailstock is fixed to the machine frame, and an ejector pin which can linearly move, can rotate and is used for abutting against and limiting the end of a workpiece is installed on the tailstock. A tool rest bottom plate capable of linearly moving in the axial direction of a workpiece is arranged on the rack, a rotary cutter head is arranged above the tool rest bottom plate, and a tool turret is arranged above the rotary cutter head; a plurality of turning tools with the machining precision gradually increased are sequentially and fixedly clamped on the tool turret in the circumferential direction at equal angles. The turning method is efficient, precise and high in automation degree. And the bottleneck problems of low efficiency, poor precision stability, dependence on skilled workers and the like of multi-precision shaft parts such as output shafts of hydraulic motors in the traditional turning process are effectively solved.

A windrower implement includes an actuation system coupled to a rotating element of a crop conditioning system for controlling a position of the rotating element to define a processing gap. A first hydraulic motor is coupled to the rotating element. A merger attachment includes a driven roller rotatably supporting a conveyor. A second hydraulic motor is coupled to the driven roller. A controller is configured to determine a current value of a first fluid pressure of the first hydraulic motor and a current value of a second fluid pressure of the second hydraulic motor, and compare the respective fluid pressures to respective thresholds. When the current value of the either the first or second fluid pressure is greater than their respective threshold, the controller controls the actuation system to increase the processing gap to prevent plugging of the crop conditioning system.

The invention discloses a crawler-type double-arm hydraulic anchor rod drill carriage, and relates to the technical field of anchor rod drill carriages.The crawler-type double-arm hydraulic anchor rod drill carriage comprises a mounting shell, a crawler walking part is fixedly mounted at the bottom of the mounting shell, two sets of supporting hydraulic cylinders are fixedly connected to the left side and the right side of the crawler walking part through cross beams correspondingly, and the output ends of the four sets of supporting hydraulic cylinders are fixedly connected with supporting discs correspondingly; rotating bases are rotationally connected to the front side and the rear side of the left end of the interior of the mounting shell correspondingly, the upper ends of the two rotating bases penetrate through the top wall of the mounting shell and are fixedly connected with rotating tables correspondingly, drilling assemblies are installed above the two rotating tables correspondingly, and a first fluted disc is fixedly connected to the lower portion of the outer surface of the rotating base on the front side; a second fluted disc is fixedly connected to the upper portion of the outer surface of the rotating base on the rear side, and a double-station switching assembly is arranged at the position, on the right side of the rotating base, in the mounting shell. The invention has the advantages that: an independent hydraulic motor and an independent control system do not need to be configured for each drill boom, so that the overall structure is greatly simplified, and the production and maintenance cost is reduced.

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 discloses a hydraulic system and hydraulic equipment for self-adaptive buffering under impact. Comprising a hydraulic motor used for driving an execution element, a closed type pump set used for driving the hydraulic motor, and a first oil way used for connecting an oil outlet of the closed type pump set with an oil inlet of the hydraulic motor. The second oil way is used for connecting an oil outlet of the hydraulic motor with an oil inlet of the closed type pump set; the self-adaptive cushion valve set is used for weakening pressure impact of the oil way on the high-pressure side and avoiding pressure suction of the oil way on the low-pressure side; oil inlets and oil outlets of the two self-adaptive buffer valve groups are oppositely connected with the first oil way and the second oil way in parallel; the hydraulic closed system is ingenious in structure, the self-adaptive buffer valve group can weaken pressure impact of a high-pressure side oil way, meanwhile, the situation that the pressure of a low-pressure side is rapidly reduced or even air is sucked is avoided, normal work of the hydraulic closed system is guaranteed, and the service life of the hydraulic closed system and all elements can be prolonged.

The invention provides a full-row-spacing strip tillage machine and a method for realizing full-row-spacing seeding. A full-row-spacing strip tillage machine comprises a machine frame, a subsoiler, a subsoiler base, a lower suspension, a grass poking wheel, an adjusting land wheel, an upper suspension, a main gear box, an oil tank, a radiator, a pressing roller transmission box, a hydraulic motor, a pressing roller cover plate, a pressing roller, a pressing roller support, a side transmission box, a side plate, an adjusting land wheel installation base, a transmission shaft, a strip tillage cutter roller, a strip tillage cutter, a strip tillage cutter shaft and a hydraulic pump. According to the strip tillage machine, the two small strip tillage belts are adopted, the small leisure belt is clamped between the two small strip tillage belts, a large strip tillage belt and a large leisure belt of a traditional strip tillage machine are replaced, a farmer can find the corresponding sowing position on the strip tillage belt from 400-700 in the ridge distance, the problems that the ridge distance of the farmer is not uniform, and sowing is difficult are solved flexibly, and a foundation is laid for wide popularization of strip tillage protective tillage. By means of the machine tool and the method, full-row-spacing strip tillage operation can be achieved, full-ridge-spacing seeding operation is achieved on the basis, the problems that farmers are different in ridge spacing and difficult in operation are solved, and wide-narrow-row protective tillage is more operable.

The present invention discloses a ball plunger hydraulic motor comprising a housing, a stator fixedly mounted within the housing, a rotor rotatably mounted within the housing, a ball plunger structure mounted between the stator and the rotor, and a brake mounted within the housing for braking the rotor. Compared to the prior art, the present invention integrates the brake within the ball plunger hydraulic motor, eliminating the need for a brake in actual use. This significantly saves space and results in a more compact structure.