1376 results about "Hydraulic equipment" patented technology

The invention discloses a device for intelligently monitoring interference assembly of a rotary table in real time and an assembly method, and relates to the technical field of interference mechanical assembly.The device comprises a working plate and further comprises a fastening device.An assembly frame is fixedly installed at the top of the working plate, and a stabilizing rod fixedly penetrates through the inner wall and the outer wall of the assembly frame; displacement equipment is slidably mounted on the circumferential surface of the stabilizing rod, hydraulic equipment is fixedly mounted on the front side of the displacement equipment, sensing equipment is fixedly mounted on the front side of the displacement equipment, a diamond block is arranged at the bottom of the hydraulic equipment, and the fastening device comprises a detection groove, a detection rod, a detection plate, a placement hole, a placement rod, a U-shaped rod and an elastic telescopic block. The U-shaped rod cannot continuously move in the direction close to the positioning plate, so that the placing rod cannot continuously move, the placing rod cannot continuously move, so that the output end of the electric push rod cannot continuously move, and the precision in the assembly process can be improved by ensuring that the clamping force is always in a proper range.

A power transmission device includes: a case that accommodates a power transmission mechanism; a strainer disposed to face a bottom wall portion in the case; a suction port for oil provided in a portion of the strainer facing the bottom wall portion; and a magnet disposed between the bottom wall portion and the strainer in the case. The magnet and the suction port are provided to be displaced from each other when viewed from a facing direction in which the strainer and the bottom wall portion face each other, and the suction port is provided with an opening facing a magnet side.

The invention discloses a slope stability test device and test method, and relates to the technical field of slope test.The slope stability test device comprises a test frame and further comprises a test adjusting device.A shielding frame is slidably installed on the inner wall of the test frame, a displacement sensor is fixedly installed on the front side of the shielding frame, and a slope model is arranged at the bottom of the inner wall of the test frame; a placing plate is fixedly installed on the inner wall of the test frame, the test adjusting device comprises hydraulic equipment, an L-shaped frame, an adjusting rod, a pressing plate, an adjusting gear, a U-shaped rod, a limiting frame and an elastic telescopic rod, and the pressing plate moves to make contact with the slope model and conducts a stability test on the slope model; meanwhile, the displacement sensor works to detect and record the displacement condition of the slope model in real time, external force mistaken touch is prevented through the elastic telescopic rod, it can be ensured that the angle of the pressing plate is kept stable in the test process, and therefore the real stability of the slope model is correctly reflected.

The invention discloses a production process and forging equipment for connecting a hollow variable cross-section oil cylinder with a large forge piece, and belongs to the technical field of forge piece forging. Forging equipment for large forgings connected with hollow variable-cross-section oil cylinders comprises a rack and further comprises a pressing head arranged on the upper side of the rack, and hydraulic equipment used for driving the pressing head to ascend and descend is arranged on the rack; the forging table is arranged on the rack and located on the lower side of the pressing head, and a rotating motor used for driving the forging table to rotate is arranged on the rack; the lifting mechanism is arranged on the side edge of the rack and used for driving the forging table to ascend and descend in the vertical direction of the rack. The forging table is automatically adjusted to move downwards and the forge piece is automatically adjusted to move upwards when the forge piece is controlled to be overturned, so that the forge piece overturning step is simplified, the forge piece overturning efficiency is improved, the distance does not need to be adjusted in one direction to leave an overturning space for the forge piece, the size of forging equipment is conveniently reduced, and then the forging cost is reduced.

An upper revolving structure (4) of an electric hydraulic excavator (1) includes a revolving frame (7), an operator's seat (10), an electric motor (15), a hydraulic pump (17) driven by the electric motor (15), an oil tank (18), and an exterior cover (20) disposed in the revolving frame (7) to cover electrical equipment including the electric motor (15) and hydraulic equipment including the hydraulic pump (17) and the oil tank (18). A partitioning member (25) that is disposed in the revolving frame (7) to partition an inside of the exterior cover (20) into an electrical equipment room (28) and a hydraulic equipment room (29). An electrical equipment cooling device (31) including an electrical equipment cooling fan (34) is disposed in the electrical equipment room (28), and a hydraulic equipment cooling device (35) including a hydraulic equipment cooling fan (37) is disposed in the hydraulic equipment room (29).

The invention discloses a multi-cylinder hydraulic equipment data interaction system based on digital twin drive, and relates to the technical field of industrial automation control. The problems that in the prior art, data acquisition and processing lack flexibility and pertinence, model construction and optimization are not perfect enough, and simulation optimization and real-time feedback are lacked are solved. Accurate perception and fault early warning of the equipment state are realized by optimizing the sensor layout and adjusting the acquisition frequency, the physical structure and the working principle of the equipment are accurately described by adopting a digital twin model, and the current and future running states of the equipment are scientifically evaluated and effectively predicted in combination with an evaluation index system of a state analysis unit. A basis is provided for advanced maintenance, the equipment fault risk is reduced, a digital twin model is used for simulating the implementation effect of a control strategy, a control instruction is optimized according to simulation evaluation, the execution effect is monitored in real time for dynamic adjustment, accurate control over equipment is ensured, the stability and reliability of equipment operation are improved, and the production efficiency is improved.

The invention discloses an equipment and facility operation and maintenance management system and method based on the Internet of Things, and relates to the technical field of equipment management. A control end classifies all valves according to health states, performs full-open adjustment on the valves which do not support operation, and then performs primary adjustment on the opening degree of each valve which supports operation according to the health states; the method comprises the following steps: acquiring a hydraulic value which needs to be output by hydraulic equipment, performing secondary adjustment on the opening degrees of all valves supporting operation by combining a valve classification result, performing weighted calculation on the health state data of all the valves by combining the relative importance of the valves in the hydraulic equipment after regularly acquiring the health state data of all the valves, and acquiring a management value of the hydraulic equipment. And judging whether the hydraulic equipment needs to be managed based on the management value. The management system adjusts the opening degree of the valve supporting operation twice, the hydraulic flow can be controlled more accurately, and the operation efficiency and stability of the hydraulic equipment are improved.

The invention provides a hydraulic equipment assembly regulation and control method and system based on image processing, and relates to the technical field of image processing, and the method comprises the steps: carrying out the multi-dimensional domain feature analysis of a historical assembly vibration signal, predicting a minimum vibration time point through an intelligent prediction model, obtaining a first historical collection image, and obtaining a second historical collection image; and introducing an image quality evaluation function to obtain a first image quality index, setting light, and performing assembly regulation and control of a first assembly link. According to the method and the device, the technical problem of low assembly alignment precision caused by low quality of the acquired real-time assembly image when the assembly regulation of the hydraulic equipment is performed based on the real-time assembly image in the prior art can be solved, the optimal image acquisition time is determined by analyzing the vibration signal during the assembly of the hydraulic equipment, and the accuracy of the assembly alignment is improved. And meanwhile, light setting during image acquisition is analyzed and optimized, so that a high-quality real-time assembly image is acquired, finally, accurate regulation and control of assembly alignment of high-precision hydraulic equipment are realized, and the technical effect of improving the assembly quality of the hydraulic equipment is achieved.

The servo valve comprises an outer shell, a valve assembly is arranged in the outer shell, the valve assembly is connected with a nested antler channel, and the nested antler channel is used for being connected with hydraulic equipment; the valve assembly comprises a rotary valve rod, a valve element and a valve sleeve, the axis of the rotary valve rod is perpendicular to the axis of the valve element, the valve element is coaxially and movably arranged in the valve sleeve, the bottom of the rotary valve rod is connected with a crankshaft, the crankshaft is sleeved with a first bearing, and the valve sleeve is arranged in the nested antler channel. A plurality of through holes used for being communicated with the nested antler channels are formed in the valve sleeve in the axial direction of the valve sleeve, a movable groove matched with the crankshaft is formed in the middle of the valve sleeve in the radial direction, a kidney-shaped mounting hole matched with the first bearing is formed in the valve element, and the length direction of the kidney-shaped mounting hole is perpendicular to the axial direction of the valve element. And at least one annular sleeve is fixedly arranged on the valve element and located on the two sides of the mounting hole in a sleeving mode, the annular sleeves are used for blocking the through holes in different positions, and the valve rod has the advantages that abrasion of the valve rod is reduced, and the service life is prolonged.

The invention discloses a composite reinforcement type suction barrel device based on microorganism induction and a use method thereof. The composite reinforcement type suction barrel device based on microorganism induction comprises a suction barrel model system, a microorganism cement reinforcement system and a test monitoring system. The suction cylinder model system comprises a suction cylinder, a grouting pipeline and hydraulic equipment, and the grouting pipeline is laid on the inner wall of the suction cylinder and used for injecting microorganism cement grout; the hydraulic equipment is connected to the suction barrel and used for controlling lifting and pressing-in of the suction barrel. The microbial cement reinforcement system comprises liquid storage equipment and negative pressure equipment, and the liquid storage equipment is connected to the grouting pipeline and used for storing and providing microbial cement grout for the grouting pipeline; the negative pressure equipment is connected to the suction barrel and used for applying negative pressure to the interior of the suction barrel in the grouting process, and permeation of microorganism cement grout is promoted. The test monitoring system is used for testing mechanical parameters of a soil body, monitoring the suction barrel and carrying out a loading test on the suction barrel.

The invention discloses a hot extrusion forming device and method for a large cylindrical forge piece, and belongs to the technical field of forge piece forming. A hot extrusion forming device for large cylindrical forgings comprises a rack and further comprises a die holder part, the die holder part comprises a lower die holder and an upper die holder, the lower die holder is fixedly arranged on the rack through a supporting rod, hydraulic equipment used for driving the upper die holder to ascend and descend is arranged on the rack, and the upper die holder is arranged on the upper side of the lower die holder and movably abuts against the lower die holder; the conveying part comprises a first conveyor and a second conveyor, a supporting base is arranged between the first conveyor and the lower die base, and the second conveyor is arranged on the side, away from the first conveyor, of the lower die base; according to the device, automatic feeding of forge piece blanks and automatic discharging of barrel forge pieces subjected to extrusion forming can be conveniently achieved, the automation degree is high, the forge piece extrusion forming efficiency is improved, an ejection mechanism does not need to be used for ejecting the forge piece blanks upwards, the forge piece blanks can be conveniently and rapidly demolded, and the extrusion forming quality of the forge piece blanks is guaranteed.

The embodiment of the invention discloses an energy-saving control method of a silage harvester and the silage harvester, and belongs to the technical field of equipment control. The silage harvester comprises a control handle, an engine and hydraulic equipment, and the energy-saving control method of the silage harvester comprises the steps that a received energy-saving mode request is responded, and whether an energy-saving mode of the silage harvester is a walking energy-saving mode or not is determined; under the condition that the energy-saving mode is the walking energy-saving mode, the real-time opening value of a control handle is determined; adjusting the real-time rotating speed of the engine to be a preset rotating speed according to the positive and negative values of the real-time opening value of the control handle; and under the condition that the real-time rotating speed of the engine is the preset rotating speed, the real-time rotating speed of the engine and the displacement current of the hydraulic equipment are updated based on the real-time opening value of the control handle and the output power of the engine. The silage harvester carries out power matching between the rotating speed of the engine and the hydraulic equipment in the running energy-saving mode, and the situation that the power of the silage harvester is excessive is avoided.

The utility model belongs to the technical field of film mulching seeding machines, and particularly relates to a multifunctional film mulching seeding machine which comprises a crawler head, a fixing frame is fixedly arranged on the tail portion of the crawler head, and two supporting wheels are symmetrically arranged on the two sides of the tail portion of the fixing frame. A traction frame which is driven by a hydraulic cylinder to swing up and down at the rear end is hinged to the middle of the fixing frame. The land leveling mechanism, the film breaking mechanism for cutting off the mulching film and lifting the cut-off head of the mulching film and the two soil covering mechanisms for covering soil on the cut-off head of the mulching film are only driven by one hydraulic cylinder instead of additionally arranged hydraulic equipment, so that the purpose of reducing the equipment cost is achieved.

The invention relates to a deep and large foundation pit supporting automatic monitoring early warning and dynamic adjusting system, and relates to the technical field of engineering monitoring, and the system comprises foundation pit supporting structure automatic monitoring devices which are disposed at the positions of all monitoring items of a foundation pit and are used for collecting real-time monitoring data; the monitoring data processing analysis and early warning platform is in communication connection with the monitoring device and is used for analyzing the real-time monitoring data and determining the risk level according to the displacement of the deformation value of the monitoring position exceeding the safety threshold value; the supporting structure automatic adjusting device is in communication connection with the early warning platform and comprises a control center and hydraulic equipment, the control center obtains risk data including the risk level, the risk position importance degree and the structure importance degree based on the deployment position of the monitoring device, and the hydraulic equipment controls and adjusts the length of the telescopic rod at the corresponding risk position in real time according to the risk data. The functions of real-time monitoring, early warning and dynamic adjustment of the supporting structure can be achieved, so that the safety and efficiency of foundation pit supporting construction are improved.

The invention discloses a hydraulic machine intelligent optimization control method based on big data analysis, and relates to the technical field of hydraulic machine intelligent control, and the method comprises the following steps: carrying out the real-time frequency domain analysis of pressure, flow and energy consumption signals during the operation of a hydraulic machine, constructing a load spectrum analysis module, extracting main frequency fluctuation characteristics, and building a corresponding spectrum template; and performing sliding cross matching on the control threshold change curve of the energy-saving mode switching and the frequency spectrum template, identifying a periodic coupling risk section, and labeling and recording the periodic coupling risk section. According to the invention, through frequency domain analysis and a self-adaptive lag mechanism, frequency resonance type oscillation in energy-saving control is effectively suppressed, and the operation stability and the response reliability of the system are improved; meanwhile, a strategy self-learning mechanism based on resonance labels and energy efficiency feedback is introduced, parameters and control strategies are dynamically optimized and judged, the adaptability and long-term robustness of the system to complex working conditions are enhanced, and intelligentization and high efficiency of energy-saving control of the hydraulic equipment are achieved.

The invention relates to the technical field of slag brick making equipment, and particularly discloses household garbage incineration slag recycling brick making equipment which comprises two fixing rods used for installing the brick making equipment and further comprises a lower die set fixedly installed on the fixing rods, and the lower die set is fixedly installed on the fixing rods. The lower die set contains an incineration slag mixture, and an inner cavity of the lower die set is enlarged and shrunk along with up-down movement. The upper module is in sliding connection with the lower module, a pressure source is applied to the upper module, and the upper module and the lower module work in a matched mode. According to the household garbage incineration slag recycling brick making equipment, after brick processing is completed, hydraulic equipment is started reversely, an extrusion plate is driven to move upwards to be combined with a bottom frame, then a movable cover is driven to move upwards, namely, a lifting plate is driven to move upwards through a lifting rod, the made bricks are made to be separated from a lower module, brick making integration is achieved, the production efficiency is greatly improved, and the production cost is reduced. Meanwhile, the bricks are suspended and convenient to take out.

The invention discloses a hydraulic mechanical transmission device control method based on optimal trajectory optimization, and relates to the technical field of equipment intelligent auxiliary operation and control, and the method comprises the following steps: S1, building a physical model of a hydraulic mechanical transmission device; s2, taking the shortest motion time, the most smooth trajectory and the minimum energy consumption as optimization objectives, and obtaining an optimal trajectory based on a trajectory planning algorithm combining an improved sparrow algorithm and a quintic non-uniform B-spline curve; s3, oil return control is optimized; and S4, oil inlet control is optimized, specifically, an oil inlet flow controller is optimized based on a time-varying secant obstacle Lyapunov function and an RBF neural network. According to the trajectory planning algorithm, the trajectory of the hydraulic transmission device can be optimized, oil return and oil inlet are optimized based on the optimal trajectory, and working trajectory planning and high-precision control over the hydraulic equipment executing mechanism are achieved.

The invention relates to the technical field of bent pipe forming processes, in particular to a 180-degree bent pipe forming device and a forming process. The 180-degree bent pipe forming device comprises a workbench, fixed pulleys are installed on the two sides of the upper surface of the workbench, hydraulic equipment is arranged over the workbench, and a stamping column is fixedly arranged in the center of the top of the hydraulic equipment; the limiting assembly comprises an arc-shaped plate fixedly arranged on one side of the surface of the workbench and a moving frame arranged right in front of the arc-shaped plate, an arc-shaped groove is formed in the top of the front end face of the arc-shaped plate, an arc-shaped guide rod is fixedly connected to the inner wall of the arc-shaped groove, and the outer wall of the arc-shaped guide rod is sleeved with a first sliding block and a spring; the front end face of the first sliding block is fixed to the rear end face of a movable frame, a first hand wheel is arranged in a gap in one side of the movable frame, and a first threaded rod is fixedly connected to the center of the end face of one side of the first hand wheel. According to the 180-degree bent pipe forming device, the pipe bending efficiency and quality can be improved, and resource waste is reduced.

The invention provides an oil pump which comprises an oil pump shell and further comprises a shell lower end plate at the bottom of the oil pump shell, a shell upper end plate is arranged at the top of the oil pump shell, two sets of pipeline connectors are connected to the outer side of the oil pump shell in a penetrating mode, two sets of heat dissipation mechanisms are arranged on the outer side of the oil pump shell, and a primary filtering mechanism is arranged on one side of the oil pump shell. According to the device, the hydraulic pressure and the flow of the oil outlet end of the oil pump are detected through the hydraulic sensor and the flow sensor, and the warning lamp is driven and triggered through flowing of oil liquid; a warning signal is transmitted to a remote receiving end through the signal transmission unit of the warning lamp, so that the oil leakage condition of the oil pump can be detected through double modes of the two sensors and the mechanical trigger structure, a detection result can be ensured in cooperation with a filtering structure, and therefore the practicability of the oil pump is greatly improved; and insufficient pressure of hydraulic equipment caused by oil leakage of the oil pump is avoided.

The invention provides a servo multi-section pressure closed-loop control closed-loop system, and belongs to the technical field of servo hydraulic equipment. Comprising a pressure execution module used for recording pressure value change and feedback signals in a pressure applying process in real time, a material change and hydraulic oil interference acquisition module, a servo equipment internal material change data set, a servo equipment external material change data set and a hydraulic oil microenvironment disturbance data set, and a pressure analysis module. The parameter evaluation module is used for establishing and evaluating an internal material change influence coefficient of the servo equipment, an external material change influence coefficient of the servo equipment and a hydraulic oil microenvironment disturbance coefficient, and the intelligent closed-loop control optimization module is used for self-adaptive compensation and stable optimization according to corresponding optimization instructions. Through multi-stage pressure setting and a real-time feedback mechanism and in combination with a high-precision servo driving system, stable and high-response pressure application to a target object in different stages is realized.

The invention relates to the field of drilling rotary guiding, in particular to a pushing type rotary guiding system which comprises a rotary cylinder and a drill bit installed at the lower end of the rotary cylinder. A supporting cylinder is hinged to the upper end of the rotary cylinder, an annular ring is arranged on the inner wall of the supporting cylinder, and a main shaft is rotationally arranged in the annular ring; when the main shaft rotates, the inner gear ring rotates along with the main shaft, and the transmission cylinder is driven to rotate through the transmission gear; the driving shaft in the transmission cylinder drives the driving gear to be meshed with the swing gear under the cooperation of the construction plate and the construction groove, so that rotation of the rotating shaft is achieved, and finally the drill bit is driven to swing, and therefore external hydraulic equipment is not needed, the complexity and the size of the system are reduced, and meanwhile the cost and the maintenance difficulty are reduced.

The embodiment of the invention discloses an energy-saving control method and device of a silage harvester and the silage harvester, and belongs to the technical field of equipment control. The silage harvester comprises a control handle, an engine and hydraulic equipment, and the energy-saving control method of the silage harvester comprises the following steps: determining an energy-saving mode type of the silage harvester in response to a received energy-saving mode request; determining a real-time opening value of the control handle; under the condition that the energy-saving mode is an operation energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time rotating speed of the engine is adjusted to the preset minimum rotating speed; when the energy-saving mode is an operation energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time rotating speed of the engine is adjusted to the preset working rotating speed; and under the condition that the real-time rotating speed of the engine is the preset working rotating speed, the displacement current of the hydraulic equipment is adjusted according to the power of the silage harvester.

Providing support devices for inspection and repair of bucket wheel stacker reclaimer hydraulic equipment. The system includes a base 1, a first connecting plate 3 is movably connected to the upper end of the base, a telescopic sleeve is fixedly connected to the center of the upper end of the first connecting plate, a second connecting plate 5 is attached to the upper end of the telescopic sleeve, a positioning plate 7 is attached to one side of the upper part of the second connecting plate via a hinge 6, and a mounting plate is fixedly connected to the upper part of the second connecting plate. The base is controlled to move to the internal inspection and repair area, and the angle of the first connecting plate is adjusted according to the supporting position, and the supporting direction of the positioning plate is adjusted, and at the same time, the screw is turned, the screw moves the positioning washer to move inward, the positioning washer presses the positioning plate to adjust the inclination angle of the upper end of the second connecting plate, and the positioning plate is inclined to support the bucket wheel stacker reclaimer.

The invention discloses a hydraulic equipment anomaly detection method and system based on artificial intelligence learning, and relates to the technical field of industrial automation and intelligent monitoring, and the detection method comprises the specific steps: data collection and preprocessing: collecting data in real time from a pressure sensor, a temperature sensor and a vibration sensor on hydraulic equipment, according to the method, the fuzzy logic and sensor data fusion technology is adopted, complementarity of pressure, temperature and vibration multi-dimensional sensor data in the hydraulic equipment is fully utilized, the fuzzy logic carries out fuzzification processing on the data, uncertainty and fuzziness in the sensor data can be effectively processed, and the accuracy of the sensor data is improved. And meanwhile, the comprehensive perception capability of the system on the equipment state is further enhanced through fusion of multi-sensor data, so that the anomaly detection is more robust, and stable operation can be realized under complex and changeable working conditions.

The present invention belongs to the technical field of hydraulic equipment, and in particular, relates to a stamping die for automobile parts that is convenient for replacing stamping dies, comprising a base, a through opening is provided on the base, a rotating motor is fixedly connected to the outer wall of the base, the driving end of the rotating motor extends through the through opening and is fixedly connected to a rotating block, lower dies of different specifications are evenly distributed on the surface of the rotating block, a stamping table is fixedly provided on the upper side wall of the base, an oil cylinder is fixedly provided on the stamping table, the driving end of the oil cylinder is fixedly connected to a punch plate vertically downward, and a supporting structure for supporting the rotating block is provided in the base. The present invention completes the replacement of the lower die by rotating the rotating block, and the fixing and releasing of the rotating block can be completed by rotating the rotating plate driven by a dual-axis motor. The overall replacement is more convenient than the traditional threaded fixing method, the efficiency of replacing the lower die is improved, and the cleaning work of the replaced lower die can be realized synchronously while replacing.

The present invention relates to the technical field of powder pressing and forming, and in particular to a powder forming hydraulic equipment with an adaptive pressure regulating function, comprising a vertical plate, a horizontal plate, a positioning cylinder, an extrusion plate, a pressing die, a hydraulic pump and an adjusting device; the present invention can solve the following problems existing in the prior art in the process of pressing and forming powder: the pressure applied to the powder cannot be adjusted, which has limitations and affects the pressing and forming effect; the powder cannot be spread flat, so that the powder raw material in the lower die forming device cannot be evenly distributed, and defects are prone to occur during the pressing process; the present invention can adaptively adjust the pressure according to powder raw materials of different materials and different forming requirements, and can be used in powder forming with a variety of different pressures, thereby improving the adaptability of the present invention; the present invention can evenly spread the metal powder by vibration, so that the metal powder is more uniform and compact, thereby ensuring the density and strength of the metal powder after pressing.

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 utility model relates to the technical field of hydraulic oil cylinder polishing, in particular to a hydraulic oil cylinder polishing machine for hydraulic equipment production. The hydraulic oil cylinder polishing machine comprises a polishing table, a guide rail is fixedly connected to the surface of the polishing table, a sliding block is slidably connected to the surface of the guide rail, and a movable seat is fixedly connected to the surface of the sliding block. A first motor is fixedly connected to the surface of the polishing table, a lead screw is fixedly connected to an output shaft of the first motor, a square nut is in threaded connection to the surface of the lead screw, a second motor is fixedly connected to the surface of the moving seat, and a rotating rod is fixedly connected to an output shaft of the second motor. According to the hydraulic oil cylinder polishing machine, the fixed base, the sealing base and the polishing head can be replaced, the inner surfaces of hydraulic oil cylinders of different specifications can be polished conveniently, time and labor are saved during operation of workers by optimizing the mode of replacing the fixed base, the sealing base and the polishing head, and the use efficiency of the polishing machine is greatly improved.

The invention provides a loading force control method for servo torque feed-forward and linear active disturbance rejection control, and belongs to the technical field of servo hydraulic equipment control. The method comprises the steps that a servo hydraulic tension pad dynamic model is constructed, and the servo torque feed-forward and linear active disturbance rejection control loading force is obtained based on the servo tension pad dynamic model and structural design parameters of a servo tension pad test bed; building a simulation model of the servo stretching pad; a simulation data set and an experiment data set are collected, the simulation data set and the experiment data set are combined, weighted and preprocessed, and a standardized feature matrix is obtained; constructing a servo feed-forward torque prediction model based on XGBoost, taking the standardized feature matrix as model input, and outputting a feed-forward torque; constructing a second-order system model of the servo stretching pad; and combining the feed-forward torque output by the servo feed-forward torque prediction model with the feedback torque calculated by the linear active disturbance rejection control to form a final torque instruction of the servo motor. According to the invention, the control precision and robustness of the loading force in the production process of the servo hydraulic stretching cushion are improved.

The invention relates to the field of material sampling and testing, in particular to a drilling and coring device for bridge pile foundation detection and a control method of the drilling and coring device. An infrared distance meter is mounted on a vertical rod of a sliding block on an annular guide rail on the base; the sampling barrel penetrates through the sleeve, the bottom end of the sleeve is connected with the base, a hydraulic cylinder of the hydraulic equipment is hinged to the base, a blocking piece hinged to the top end of a piston rod of the hydraulic equipment abuts against the top end of the sleeve, an annular groove is formed in the outer wall of the top end of the sleeve, and a pressure sensor is installed between the blocking piece and the annular groove. A processor is mounted in a box body on the base; in the drilling and coring process, the sliding block moves along the annular guide rail, the processor collects data output by the infrared distance meter and the pressure sensor and obtains the deviation direction and the deviation angle of the sampling barrel, and the pressure of the hydraulic equipment is adjusted according to the deviation direction and the deviation angle. The problem that the sampling barrel cannot automatically rectify deviation in real time when the solid material to be analyzed is sampled, drilled and cut is solved.