5717 results about "Hydraulic press" patented technology

The invention discloses hydraulic machine equipment suitable for die forging and blank making of various flanges and a forging method, and belongs to the technical field of flange production equipment.The hydraulic machine equipment suitable for die forging and blank making of various flanges comprises a base and further comprises a top plate, the top plate is arranged on the upper side of the base, and a guide column is arranged between the top plate and the base; the first hydraulic oil cylinder is fixedly arranged on the top plate, and a piston rod of the first hydraulic oil cylinder is connected with a pressure head; all positions of the forge piece are sequentially arranged on the lower side of the pressing head through the swing mechanism, all positions of the forge piece are conveniently and evenly forged, workers do not need to shake the forge piece back and forth by utilizing a clamp or a clamp on the side, and when the pressing head moves upwards every time, the die holder is automatically separated and is matched with the air spraying opening to blow away waste chips generated in the die holder during forging and pressing of the forge piece; and excessive scraps are prevented from being accumulated in the die holder and being matched with the forge piece gradually filling the die holder again, the follow-up processing time of the flange forge piece is shortened, and the flange processing efficiency is improved.

The invention relates to a split type electro-hydraulic direct-driven non-retractable fin stabilizer hydraulic system which comprises a hydraulic unit and an actuating mechanism which are independently arranged, and the actuating mechanism comprises fin rotating oil cylinders which are symmetrically arranged; a bidirectional hydraulic pump driven by a servo motor forms a closed fin rotating loop; the bidirectional hydraulic pump driven by the servo motor, the hydraulic unit and the actuating mechanism form an electro-hydraulic direct-drive fin stabilizer device; the control loop is composed of a gyroscope, a controller and an executing mechanism, and the gyroscope detects the rolling angular velocity of the ship and generates a fin rotating instruction signal; the controller compares the instruction signal with the fin angle feedback signal and outputs a servo motor rotating speed instruction; the servo driver controls the servo motor to rotate forwards and backwards, the bidirectional hydraulic pump is driven to adjust the displacement of the fin rotating oil cylinder, and therefore the fin is driven to rotate. A valve control or pump control type hydraulic system adopted by a traditional fin stabilizer is replaced, integrated optimization, light weight, high efficiency, high reliability and low noise of the fin stabilizer hydraulic system are achieved, and the occupied space of equipment is reduced.

The utility model relates to the technical field of model tests, and discloses a landslide damage simulation test device which comprises a model test box, a rainfall frame, a hydraulic assembly, a plurality of spraying assemblies, a water tank assembly and a constant temperature system. The angle of the landslide model box can be adjusted through the hydraulic machine so as to change the slope of a model test landslide soil body; the multiple spraying assemblies are arranged at the top of the rainfall frame and located over the model test box, the output ends of the spraying assemblies aim at a test soil body in the model test box, the influence of rainfall on landslide slippage is simulated by adjusting the spraying size, and the constant temperature system is arranged at the top of the model test box and used for regulating and controlling the temperature of the test soil body. The constant temperature system is used for measuring the influence of the dry-wet cycle effect on the landslide soil body.

The invention relates to the technical field of building shock insulation, and discloses a building shock insulation rubber support which comprises a bottom connecting plate and a top connecting plate, a damping rubber body is arranged between the bottom connecting plate and the top connecting plate, and a first through hole is formed in the middle of the damping rubber body; a plurality of fixing grooves are formed in the damping rubber body in the axial direction, and metal plates are arranged in the fixing grooves. By arranging the bottom connecting plate with the adjusting rod, one part of the adjusting rod is inserted into the damping rubber body, and one end of the adjusting rod is movably connected with the bottom connecting plate, after vibration is finished, if the damping rubber body cannot restore to the original shape, force is applied to one end of the adjusting rod through a hydraulic mechanism in a pushing or pulling mode, and the damping rubber body cannot restore to the original shape. Under pushing of the adjusting rod, resetting of the damping rubber body can be rapidly completed, and operation is convenient and rapid.

The invention relates to the technical field of frame type hydraulic machines, and discloses a machining device and process of a stand column for a frame type hydraulic machine. The device comprises a welding center, and the welding center is composed of a positioning mechanism, a welding mechanism, a reversing assembly, a driving assembly, a preheating assembly, a grinding mechanism and a plurality of auxiliary supporting mechanisms; the welding center is further provided with an outer circular pipe and an inner circular pipe, the positioning mechanism is installed in the inner circular pipe, the driving assembly is integrally assembled on the positioning mechanism, directional conveying of the steel component during welding is achieved, meanwhile, the steel component is pressed, the welding stress is reduced, and the reversing assembly is installed in the outer circular pipe and used for supporting and driving the inner circular pipe to rotate in the axial direction. According to the technical scheme, the assembly type inner framework can play a supporting role from the interior of the square tube during welding, the assembly type inner framework and the square tube form a whole after welding, the structural stability of the stand column during use is effectively improved, and meanwhile steel members can be pressed from the corners of the stand column to reduce welding stress.

The invention relates to the field of copper-clad plate press-fit processing, in particular to a copper-clad plate forming processing device and method.The copper-clad plate forming processing device comprises a supporting table of a hollow structure, a lower layer pressing plate is fixedly connected to the top of the supporting table, and a portal frame stretching across the front side and the rear side of the lower layer pressing plate is fixedly installed at the top of the supporting table; a hydraulic mechanism located above the supporting table is installed at the bottom of the portal frame, and a correction mechanism located on the side face of the lower pressing plate and a multi-stage laminating mechanism located on the top of the lower pressing plate are installed at the bottom of the hydraulic mechanism. According to the invention, the first-stage lamination mechanism and the second-stage lamination mechanism are matched to carry out multi-stage lamination on each layer of stacked copper-clad plates, and the second-stage lamination mechanism is firstly utilized to carry out multi-point pre-compaction on the copper-clad plates, so that air among the layers can be discharged from gaps among compaction points; and then the primary laminating mechanism performs high-temperature heating lamination on the copper-clad plate, so that bubbles are prevented from appearing in the copper-clad plate, and the firmness and quality of lamination molding of the copper-clad plate are improved.

The invention discloses a frame manufacturing method and a frame, relates to the technical field of frame production, and aims to solve the problem that a welding seam at the splicing position of an existing motorcycle frame is obvious. According to the technical scheme, the method is characterized by comprising the following steps that S1, a metal plate is provided as a raw material, and a frame blank is formed through cutting; s2, the frame blank is placed in a stretching die on a hydraulic machine to be subjected to pressure forming, deformation of the frame blank is controlled through a cavity of the stretching die, and a continuous streamline curved surface is formed on a frame body; and S3, laser cutting is carried out on the frame body based on artificial intelligence. The method comprises the following sub-steps that S3.1, actual three-dimensional point cloud data of the surface of the stretched and formed frame body are obtained through an optical scanning system. According to the method, dense welding seams of traditional multi-section splicing are thoroughly eliminated through the integrated streamline forming technology, intelligent prediction and self-adaptive correction are conducted on material springback and thermal deformation in combination with the AI dynamic compensation cutting technology, and precise adaptation of the frame contour and the motor interface is achieved.

The invention discloses a machine part manufacturing punching machine with a protection mechanism, and relates to the technical field of machine part manufacturing, the machine part manufacturing punching machine comprises a base, a positioning frame is fixedly mounted at the top of the base, and a protection door is rotatably mounted on the surface of the positioning frame; and the stamping assembly is used for forming and stamping the mechanical parts. According to the machine part manufacturing punching machine with the protection mechanism, a worker places a machine part material plate above a stable supporting assembly and adjusts the position between a clamping assembly and the material plate so that the two sides of the material plate can be positioned in a balanced mode, then the worker starts a hydraulic machine, and the hydraulic machine drives a punching assembly to move downwards to punch the material plate; when the stamping assembly stamps the material plate, the stable supporting assembly is extruded to sink downwards so as to buffer pressure generated by the stamping assembly, and a protective door arranged on the outer side of the positioning frame protects chippings generated by stamping, so that the situation that the chippings splash to injure workers is avoided.

The invention relates to a copper-aluminum composite heat dissipation plate forging and pressing manufacturing process and a copper-aluminum composite heat dissipation plate. The process comprises the steps that S1, assembling is conducted, specifically, an aluminum plate and a copper plate are stacked, and a double-layer plate is obtained; s2, welding is conducted, specifically, the aluminum plate and the copper plate are compounded in a diffusion welding mode, the junction position of the aluminum plate and the copper plate is welded to form a diffusion layer, and a double-layer welded plate is obtained; the double-layer welding plate is extruded and stretched through a hydraulic machine to form the copper-aluminum composite heat dissipation plate, forming holes are formed in a template, facing an aluminum plate, of the hydraulic machine, the aluminum plate is extruded through the forming holes, heat dissipation protrusions of an aluminum-clad copper structure are formed on the copper-aluminum composite heat dissipation plate, the width of the heat dissipation protrusions is larger than 1.5 mm, and the heat dissipation protrusions are arranged on the aluminum plate; and the thickness of the aluminum layer on the surface of the heat dissipation bulge is not less than 0.1 mm. The copper-aluminum composite heat dissipation plate is manufactured through the process. According to the technology, the copper-aluminum composite heat dissipation plate can be obtained through a simple manufacturing method, the high heat conductivity of copper and the corrosion resistance of aluminum are compatible, and connection at the copper-aluminum interface is reliable.

The invention relates to a method for controlling a hydraulic motor vehicle braking system comprising a first hydraulic subsystem (100) comprising a hydraulically coupled brake pedal (12) for pressure build-up in at least one first wheel brake (8a, 8b) and a first electrical pressure supply device (5) for driver-independent pressure build-up at the at least one first wheel brake (8a, 8b) and a second hydraulic subsystem (200) comprising a second electrical pressure supply device (2) for driver-independent pressure build-up at the at least one first wheel brake (8a, 8b), wherein in a fault-free case the pressure at the at least one first wheel brake (8a, 8b) is built up by the first electrical pressure supply device (5).In order to provide both good pedal feel and high deceleration, in the event of a fault in the first subsystem (100), the system switches to a half-by-wire mode or a hydraulic fallback mode, whereby the pressure in the at least one first wheel brake (8a, 8b) is built up without electrical amplification by the muscle power of a driver via the hydraulically coupled brake pedal (12) as long as a switching condition is not met, and when the switching condition is met, the system switches to an amplification mode in which the hydraulically coupled brake pedal (12) is disconnected from the at least one first wheel brake (8a, 8b) and the pressure in the at least one first wheel brake (8a, 8b) is built up by the second electrical pressure supply device (2).

The invention relates to the technical field of hydraulic machine oil cylinder assembling, in particular to an automatic oil cylinder assembling control system and an assembling process. Comprising an assembling platform, a clamping mechanism, a mounting mechanism, a visual monitoring system and an upper computer, the upper computer controls the clamping mechanism, the mounting mechanism and the visual monitoring system, through cooperation of all the mechanisms and a monitoring module, an oil cylinder is moved from one end of the assembling platform to the other end of the assembling platform, all parts are assembled in the moving process, and the assembling process is completed. The purpose of automatically installing the oil cylinder is achieved, the whole installation process can be monitored, and the purposes of reducing the number of reworking times, improving efficiency and improving the quality of the oil cylinder are achieved.

According to the powder forming hydraulic machine, a servo motor and an automatic control system are arranged, a gear disc is in transmission connection with the servo motor through a gear, the automatic control system can control the precision of vertical rotation of the gear disc, and therefore the precision of material adding and reducing of the hydraulic machine is guaranteed while automatic material adding and reducing are achieved through the hydraulic machine; the supporting rings are two opposite semicircular steel rings, the supporting rings are located in the circular grooves formed in the inner ring of the gear disc, the gear disc can move up and down to drive the supporting rings to move up and down, when the lower pressing head needs to be replaced, only the two semicircular supporting rings of the supporting rings need to be detached, then the core rod is removed, the lower pressing head can be separated from the female die plate, and the replacement time of the lower pressing head is shortened.

The utility model relates to concrete compression resistance testing equipment which comprises a body mechanism and a centering mechanism, the body mechanism comprises a base, a support is arranged at the upper end of the base, a hydraulic press is arranged on the support, a pressing plate is arranged at the lower end of the hydraulic press, and the centering mechanism is installed on the support and comprises a pressure bearing table. In the process that the two centering blocks push the concrete test block, the test block is provided with a free end and can rotate, so that the concrete test block can be prevented from being located between the centering blocks, concrete chippings can be prevented from splashing out of the device by arranging the protection window, the personal safety of workers is protected, and the magnetic protection window can be attracted to the support and is convenient to open and close; and the holes are formed in the pressure-bearing table, so that crushed concrete test blocks after the test can be conveniently recycled, and the difficulty of cleaning the device by workers is reduced.

The invention belongs to the technical field of rock drills, and discloses a rotary impact type hydraulic rock drill. The rock drilling bit group is arranged in one side of the rock drilling machine shell; the rotating mechanism is arranged at the top of the rock drill shell, and the rotating mechanism is located above one side of the rock drill bit set; according to the technical scheme, by arranging the hydraulic mechanism, the cooling and cleaning assembly and the driving assembly, when the hydraulic mechanism is started to make the output end collide with one end of the middle of the rock drilling bit set back and forth, the top of one side of the driving assembly is driven to move up and down back and forth; cold water in one side of the cooling and cleaning assembly can be pumped back and forth into the other side of the cooling and cleaning assembly, and then the cold water can be sprayed out through the other side, so that heat generated by the impact part of the hydraulic mechanism and the rock drilling bit group can be cleaned and cooled; the service life of parts in the rock drill shell is prevented from being influenced by high temperature.

The invention relates to the technical field of cubic hydraulic press monitoring, in particular to a cubic hydraulic press health monitoring method and system based on an intelligent sensor, and the system comprises a health monitoring terminal, a data sensing module, a data processing module, a health diagnosis module, a fault management module, a diagnosis positioning module, a cooperative influence module and a rear-end execution module. According to the method, the time domain, the frequency domain and the time domain-frequency domain combined features are extracted, meanwhile, the state change slope is quantified, early warning of the equipment degradation trend is achieved, a fault type-abnormal feature-weight mapping table is constructed, a fault core component and the specific position are accurately positioned, and the fault core component is accurately determined by matching with digital twinborn visual marks. And meanwhile, the internal relation between components is quantified by constructing a component incidence matrix, the health influence coefficient of the cooperative component is calculated in combination with a fault grade coefficient, key components affected by faults are recognized in advance, a cooperative damage list is formed, and operation and maintenance personnel are assisted to intervene in advance.

The invention discloses a hydraulic machine with a safety protection function, and relates to the technical field of hydraulic machines. Auxiliary stand columns are installed on the periphery of the outer surface of the supporting column set, springs are arranged on the outer surfaces of the auxiliary stand columns in a sleeving mode, fixing blocks and four-column frame assemblies are fixedly connected to the outer surfaces of the bottoms of the supporting columns, when the supporting columns operate downwards to apply pressure, a protection plate can slide downwards rapidly, and the outer surface of the protection plate is protected by irregular rubber bodies; when the supporting columns are extruded, scattered small parts can absorb kinetic energy through the irregular colloid on the outer surface of the protection plate, and the service life of the protection plate is effectively prolonged. The working table and the control table are arranged at the bottom of the supporting column assembly, the working table and the control table are integrated and detachable, and space is effectively saved. The safety of operators and a machine is guaranteed through the guard plate, the irregular rubber body and the brake when the hydraulic machine works, and normal operation of the hydraulic machine is guaranteed.

The invention relates to the technical field of mine construction, in particular to a cross-section layer large-dip-angle fully mechanized coal mining face wall caving prevention method which comprises a wall caving prevention equipment anti-skid cooperative system which is an integrated system composed of a hydraulic support, a scraper conveyor, an inclined anti-skid mechanism and an anti-skid hydraulic machine. The device is used for achieving anti-skid, anti-falling and posture cooperative adjustment of the device in the pseudo-inclined dip mining slope adjustment process. The hydraulic support is rigidly connected through the externally-arranged anti-skid hydraulic machine, the linkage influence of sliding-down of the scraper conveyor is counteracted, and the hydraulic support is prevented from toppling over; the built-in anti-skid hydraulic machine corrects the deviation of the connecting rod and protects the hydraulic support from being damaged; the anti-skidding, anti-falling and anti-caving effects of the fully-mechanized coal mining equipment in effective mining of the large-dip-angle working face are achieved through layout adjustment of the pseudo-dip dynamic adaptive fault and the fully-mechanized coal mining equipment anti-skidding system, the mining efficiency of the working face is improved, the equipment sliding-down possibility is reduced, and the technical problems existing in the large-dip-angle fully-mechanized coal mining process are solved.

The utility model relates to a spatial multilayer ultrahigh pressure belt type dehydration system which comprises a main rack, a material distributing and feeding device, a material distributing device, a filter belt, a filter belt traction machine, a filter pressing hydraulic machine, a hydraulic station and a controller, the material distributing and feeding device, the material distributing device, the filter belt traction machine and the filter pressing hydraulic machine are connected and mounted on the main rack; and the output end of the material distributing and feeding device is connected and mounted above the material distributing device. The dehydration method comprises the steps of equipment starting, material distribution, filter pressing dehydration and unloading. The organic waste dehydration device is higher in dehydration efficiency and lower in cost, and can be used as an organic waste dehydration device capable of reducing pollution and carbon.

The utility model discloses a flattening device for brake pad steel backing processing, which relates to the technical field of steel backing processing and comprises a base body, a mounting bottom plate is fixedly mounted at the top of the base body, a lower pressing tool is mounted at the center of the upper surface of the mounting bottom plate, and supporting columns are fixedly mounted at four corners of the mounting bottom plate. An oil press is fixedly installed at the top ends of the supporting columns, an upper pressing plate is fixedly installed at the output end of the oil press, and buffering assemblies are installed on the upper surface of the installation bottom plate and located on the two sides of the lower pressing tool. The piston rod drives the piston to the bottom of the piston barrel, gas in the piston barrel is squeezed into the gas outlet pipe and finally blown out through the gas blowing box, sweeps on the surface of the lower pressing tool are blown to fall into the collecting drawer, and after a period of time, an operator draws out the collecting drawer and cleans the sweeps in a concentrated mode. Scraps are prevented from being accumulated on the surface of the lower hold-down clamp to affect the follow-up flattening operation of the brake pad steel backing, and then the overall operation speed is prevented from being affected.

The utility model discloses a gate valve with improved bidirectional sealing performance, which comprises a valve body, baffle rings are symmetrically arranged in the valve body, the outer side surfaces of the baffle rings are fixedly connected with the inner wall of the valve body, a gate plate is arranged on the inner sides of the baffle rings, an auxiliary pipeline is arranged above the gate plate, and the auxiliary pipeline is fixedly connected with the side surface of the valve body. Annular grooves are symmetrically formed in the surfaces of the two sides of the gate plate, sealing rings are fixedly connected to the surfaces of the inner sides of the annular grooves, a guide pipe is fixedly connected to the upper surface of the gate plate, the lower end of the guide pipe communicates with the annular grooves, the upper end of the guide pipe penetrates through the auxiliary pipeline to be connected with a hydraulic mechanism, and a driving mechanism is installed at the upper end of the auxiliary pipeline. The connecting flange is fixedly connected with the valve body. The problem that in the using process of a traditional gate valve, abrasion of a sealing ring on the gate plate sealing face is more and more serious is solved, the situation that the gate valve leaks due to the fact that the sealing performance of the gate plate is reduced after long-time use is avoided, the using sealing performance of the gate valve is improved, and the service life of the gate valve and the gate plate is prolonged.

The utility model discloses a press fitting and riveting system for a bushing of an oil sprayer. The press fitting and riveting system comprises a feeding unit, a loading unit, a pre-mounting unit and a press fitting unit, wherein the feeding unit adopts an annular feeding conveying line, and a lining is placed on the annular feeding conveying line; the feeding unit adopts a mechanical arm, and a clamping jaw is installed on the mechanical arm and used for grabbing a lining and placing the lining into an oil sprayer lining bottom hole of an air cylinder cover. The pre-mounting unit comprises a positioning device for positioning the cylinder cover; the press-fitting unit comprises a press-fitting press and a riveting press which are respectively used for press-fitting and riveting the bushings; according to the utility model, all the assembly units are utilized to work efficiently and cooperatively, and the use of high-automation, high-precision and intelligent equipment in the whole assembly process reduces the use conditions of low efficiency and high energy consumption caused by manual assembly and hydraulic press fitting.

The invention is suitable for the technical field of powder metallurgy and advanced ceramic material sintering equipment, and provides an integrated flash sintering device for vacuum and a sintering method. The device comprises a power supply module, a high vacuum module, a first servo hydraulic machine, a second servo hydraulic machine, a third servo hydraulic machine, a mold rotation switching module, a vacuum feeding module, a green body pressing module, a demolding and mold cleaning module and a mold transfer module. According to the invention, an integrated gear tray design is adopted to integrate the functions of die installation, graphite paper treatment and green body pressing, and online synchronous cleaning of an electrode and a die is realized through die fixation and a cleaning brush arranged in a cleaning drum; therefore, full-automatic, high-efficiency and high-stability continuous production of flash sintering from powder filling to finished product collection is realized.

The invention relates to the field of sheet metal part machining equipment production, in particular to sheet metal part side edge bending and cutting equipment which comprises a machining table, two bending frames moving in the left-right direction are arranged at the top of the machining table, and a bending pushing frame moving in the left-right direction is arranged on one side of the top of the machining table. By arranging the synchronous butt joint assembly, cutting ultrasonic waves can follow the bending angle change of the sheet metal part in real time, the edge of the bent part is accurately cut all the time, the cutting accuracy is effectively improved, the product quality is guaranteed, bending and cutting are synchronously carried out, the step of manually transferring the sheet metal part is abandoned, and the production efficiency is improved. When the hydraulic machine is started to drive the bending pushing frame to conduct bending operation, the electric push rod is synchronously started to drive the cutting ultrasonic waves to conduct cutting, the machining time is greatly shortened, and the problem that the machining efficiency is low due to step-by-step operation in an existing manual operation mode is solved.

The invention relates to the field of building construction equipment, and discloses an intelligent material distributing machine of a tower building machine and a working method thereof.The intelligent material distributing machine of the tower building machine comprises a base fixed to the top of the tower building machine and further comprises a material distributing mechanism, a supporting arm, a rotary disc, a conveying pipe, a swing arm and a weight box; a pulling plate structure pulls a connecting rod to slide towards a first gear plate in a track plate, then the lower end of a supporting rod slides downwards in a track strip and then supports a guiding pipe, the guiding pipe rotating leftwards is supported, the influence of the gravity of the guiding pipe on a hydraulic press is reduced, and the situation that the hydraulic press is prone to being damaged due to the too large load is avoided. Impact force of concrete in the runner pipe is converted into stable supporting force of the buffer structure to the runner pipe, shaking of the runner pipe under the impact force of the concrete is reduced, the stability of concrete pouring of the runner pipe is improved, the stability of the discharging structure is enhanced, shaking caused by instability of the guide pipe can be avoided, and the load on a hydraulic press is reduced.

The invention discloses an anti-unbalance-loading sliding block active deviation correction method for a hydraulic machine sliding block, and the method specifically comprises the following steps: 1, unbalance loading detection: collecting displacement deviations [delta] x and [delta] y of the sliding block in X / Y directions in real time, installing a pressure sensor in a hydraulic cylinder oil path, detecting to obtain pressure data N, obtaining the pressure value of each supporting point, and calculating the deviation of the sliding block in the X / Y direction; calculating an offset center distance e and an offset load moment M according to the pressure data; the displacement deviation delta x and the displacement deviation delta y are compared with a preset threshold value, whether deviation rectification is triggered or not is judged, and if the deviation rectification is triggered, the mapping relation between the sliding block inclination angle theta and the hydraulic cylinder pressure compensation amount delta P is established through a mechanical model. According to the anti-unbalance-load active deviation correction method for the hydraulic press sliding block, displacement, pressure and dip angle data are combined, the unbalance-load recognition precision is improved, response is fast, PID parameters are adjusted in real time according to load changes, the accuracy of the position of the sliding block under different working conditions is adapted, and high-precision deviation correction is achieved.

The invention discloses a hydraulic mechanism for a water-cooled magnet structure with high mechanical stability. The hydraulic mechanism comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The water-cooled magnet has the advantages that axial stress application can be carried out on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, and the high mechanical stability of the water-cooled magnet is improved.

The invention discloses a fault early warning hub unit, and relates to the field of railway vehicle body parts, the fault early warning hub unit comprises a rim and spokes, the inner wall of the rim is provided with a plurality of positioning blocks along the circumference, the two ends of each positioning block are provided with contact switches, the contact switches abut against each other, the side walls of the spokes are rotatably connected with air deflectors, and the air deflectors are rotatably connected with the spokes. A hydraulic mechanism is movably connected between the air guide plate and the spokes, a mounting groove is formed in the middle connecting part of the spokes, an oil storage shell is arranged in the mounting groove, the hydraulic mechanism is communicated with the oil storage shell, and the oil storage shell is filled with hydraulic oil. Monitoring of deformation of the whole hub unit is achieved through the circle of positioning blocks on the rim, when the rim deforms, the positioning blocks can be relieved from the abutting state, the contact switch is turned on, the positioning blocks are powered on, a vehicle owner is reminded that the position is deformed, and the early warning and monitoring effect of the hub unit on hub deformation is effectively 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 a method for controlling a hydraulic motor vehicle braking system comprising at least one hydraulic wheel brake (8) which can be connected via at least one hydraulic valve (6) to a first (5) and / or a second pressure supply device (2), wherein the first pressure supply device (5) is a linear actuator and the second pressure supply device (2) is a piston pump. To meet high safety standards, the pumping capacity of the piston pump (2) is verified by connecting the pressure side of the piston pump (2) to the linear actuator (5) as a volume sink, operating the piston pump (2) to pump brake fluid, which is received by the linear actuator (5), wherein the volume received by the linear actuator (5) is determined based on the piston position, piston movement and / or pV characteristics and is used as a measured variable for verification.

The invention discloses a hydraulic drive hydrogen compressor based on electric servo EHA system control, and relates to the technical field of the electric servo EHA system control drive mode of an upper supercharger of the hydraulic drive hydrogen compressor, the compressor comprises a hydraulic mechanism and a pressurization mechanism, and internal oil flows into the hydraulic mechanism according to the requirement of the pressurization mechanism. An explosion-proof servo motor drives a servo pump to build pressure of oil liquid, the pressure of the oil liquid is maintained through a functional mechanism, then the oil liquid is cooled and filtered through a filtering mechanism, finally, the oil liquid is conveyed to a pressurizing mechanism and runs on one side of the pressurizing mechanism, hydrogen enters through air inlets of the superchargers, the two superchargers are driven by a hydraulic mechanism, the entering hydrogen is compressed, and the pressure of the oil liquid is increased. And discharging from the exhaust port.