227 results about "Hydraulic shock" patented technology

The invention relates to the field of electromagnetic valves, in particular to a valve body unit, an electromagnetic valve with the valve body unit and an electric control hydraulic shock absorber with the valve body unit. The hydraulic unit comprises a main valve assembly; the valve plate unit is arranged on the main valve assembly; the main valve assembly comprises a main valve shell. An oil channel is arranged on the main valve shell; the valve plate unit comprises a control valve plate; the control valve plate is arranged at the end part of the main valve shell; the control valve plate can deform; after the control valve plate is deformed, a communication channel is formed at the joint of the control valve plate and the main valve shell; through the arrangement of the control valve plate, after the current of the coil unit is cut off, overflow and discharge of hydraulic oil can be achieved through deformation of the control valve plate.

The invention belongs to the technical field of automobile shock absorbers, and particularly relates to a shock absorber assembly structure for an active hydraulic suspension. Liquid in the rod cavity and the energy accumulator can be pumped into the rodless cavity by regulating and controlling the two-way pump to achieve active jacking of the hydraulic shock absorber, liquid in the rodless cavity is pumped into the energy accumulator and the rod cavity to enable the shock absorber to be actively compressed, and then the lifting end of the shock absorber drives a vehicle body to synchronously move to achieve active adjustment of the height of the vehicle body. In addition, a first channel, a second channel, a third channel, a fourth channel, a first electromagnetic one-way damping valve, a second one-way damping valve, a third electromagnetic one-way damping valve and a fourth one-way damping valve are arranged on the base, and the first electromagnetic one-way damping valve, the second one-way damping valve, the third electromagnetic one-way damping valve and the fourth one-way damping valve are used for controlling the oil flow direction and damping force. An oil flow channel and a flow direction of a traditional shock absorber are changed, a plurality of valve bodies are integrally assembled, and assembly of the valve bodies and the shock absorber is facilitated.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing, which controls whether a liquid inlet hole is directly communicated with a main liquid cavity or not through an elastic valve plate, and controls whether the main liquid cavity is communicated with a liquid outlet hole or not through a pressurizing seat. The pressure of oil entering the liquid inlet must overcome the tension of the elastic valve block, the supporting force of the elastic supporting piece can push the elastic valve block and the pressurizing base to move in the direction away from the main valve body, then the oil can flow back to the shock absorber through the liquid outlet hole, and the resistance borne by the oil in the electromagnetic valve is increased. And large damping force is provided for the vibration damper. By arranging the pressurizing cavity, when the electromagnetic coil is powered on, the pilot valve element blocks the overflow hole, oil in the overflow hole applies pressure to the pressurizing base, the oil does not easily push away the pressurizing base and the elastic valve block in the direction away from the main valve body, and oil resistance is further increased. The electromagnetic valve consumes less electric energy, and the vehicle research and development test efficiency is improved.

The invention relates to the technical field of image processing, in particular to a damper valve system adjustment method based on an artificial intelligence technology, a product, equipment and a storage medium. The method comprises the steps that parameter combinations of all valve systems of the shock absorber are collected; performing data quantization on the parameter combination to obtain a feature combination; and inputting the feature combination into a neural network model to obtain a change curve of the damping force along with the piston speed predicted by the neural network. According to the method, the external characteristic functions of the passive hydraulic shock absorber under different valve system structures are predicted through the artificial intelligence algorithm, and the number of tests in the chassis adjustment process is reduced.

The invention discloses a vehicle oil damper and an intelligent monitoring system thereof, and relates to the technical field of vehicle suspension systems, the vehicle oil damper comprises a dustproof sleeve, the dustproof sleeve is made of high-strength steel, the top of the dustproof sleeve is fixedly connected with an upper sealing plate through welding, and a first sealing ring is embedded in the bottom of the upper sealing plate; the surface of the first sealing ring makes contact with the inner wall of the dustproof sleeve, and the bottom of the upper sealing plate is fixedly connected with an airtight ring. According to the invention, by integrating a multi-dimensional sensor network and a data fusion algorithm, real-time, accurate and deep perception and fault diagnosis of the working state and the health state of the shock absorber are realized; according to the intelligent processing unit based on the heterogeneous multi-core architecture, various faults such as nitrogen leakage, sealing failure, oil emulsification and abnormal wear can be warned in advance, and the damping characteristic is compensated through the performance self-adaptive adjustment module, so that the reliability, safety and riding comfort of a suspension system are improved.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing. A backflow channel communicated with an overflow cavity and a pressurizing cavity is arranged on a partition plate, a one-way valve leading to the pressurizing cavity is arranged on the backflow channel, so that oil flowing into the overflow cavity flows back into the pressurizing cavity to react on a pressurizing seat, and the oil in a main liquid cavity needs to have higher pressure when the pressurizing seat is pushed away from a main valve body; and the oil liquid pressure difference between the liquid inlet and the liquid outlet is further increased, the damping force of the oil liquid in the electromagnetic valve is increased, and the vibration reduction performance of the vibration damper is improved. Compared with an electromagnetic valve of a shock absorber in the prior art, when the power-on amount of the electromagnetic coil is certain, the electromagnetic valve provides larger damping force for the vehicle shock absorber; on the contrary, when the damping force needed by the vehicle shock absorber is fixed, the electromagnetic valve consumes less electric energy, the number of times of vehicle charging in the vehicle driving evaluation test process is reduced, the vehicle research and development test efficiency is improved, and electric energy is saved.

The invention relates to the technical field of fully-mechanized coal mining automation control, and discloses a hydraulic support lifting control method and device based on flow proportion and attitude feedback, and the method comprises the steps that a controller establishes a physical parameter model, and the controller calculates the target flow of a stand column oil cylinder and the target flow of a bottom lifting oil cylinder according to a kinematics coupling model; the controller executes a feedforward and fuzzy PID composite control strategy, the controller generates a feedforward instruction and combines the feedforward instruction with the feedback control quantity to synthesize a final valve control instruction, and the controller drives the electro-hydraulic control valve set to act; the controller monitors the synchronous error of the adjacent hydraulic supports and corrects a final valve control instruction, and the controller monitors the speed matching state and executes attitude priority deviation correction; the controller judges whether lifting is completed or not according to the displacement of the stand column oil cylinder, the displacement of the bottom lifting oil cylinder and the pitch angle of the hydraulic support, and the controller executes valve port smooth closing logic. According to the invention, the track tracking precision and the dynamic response speed of the lifting frame are improved, the action synchronism and the attitude stability are ensured, and hydraulic impact is eliminated.

The utility model discloses a damping single-phase electronic electric energy meter box, which comprises an electric energy meter box module, and the electric energy meter box module comprises a box body frame. The convenient disassembly and assembly module comprises a guide groove formed in the center of the front face of the inner wall of the box body frame, a guide block is slidably arranged in the guide groove, the front face of the guide block is sleeved with a mounting plate, sliding grooves are formed in the two opposite sides of the inner wall of the guide groove, and sliding blocks are fixedly arranged on the upper portions of the two sides of the guide block; the sliding rod extends into the sliding groove and abuts against the lower end; the device further comprises a damping module, the damping module comprises movable grooves symmetrically formed in the ends of the two opposite sides of the inner wall of the box body frame, micro hydraulic dampers are arranged at the rear ends of the inner walls of the movable grooves, one ends of the micro hydraulic dampers are sleeved with movable blocks, and movable plates are fixed to one ends of the multiple movable blocks. The electric energy meter can be conveniently disassembled and assembled at a low position, time and labor are saved, simplicity and convenience are achieved, use is convenient, requirements are met, and the use effect is improved.

We provide a piston-through hydraulic damping accumulator that absorbs or reduces hydraulic shock in real time, thereby smoothing the pressure in the hydraulic system. [Solution] A piston-through type hydraulic damping accumulator comprising a cylinder block 10 having a hollow cavity, a first hydraulic oil hole and a second hydraulic oil hole provided at both ends of the cylinder block 10, a floating spacer 20 dividing the cylinder block 10 into a damping chamber 1011 and a hydraulic oil chamber 1012 that are sealed and isolated from each other, a communicating member 30 for connecting the first hydraulic oil hole, the second hydraulic oil hole and the hydraulic oil chamber, the communicating member provided inside the cylinder block 10 along the central axis direction of the cylinder block 10, and the floating spacer 20 fitted so as to slide and seal to the outside of the communicating member 30. The accumulator can be installed in series with the hydraulic system to immediately capture and absorb hydraulic shocks in the hydraulic system.

The invention discloses a two-stage magnetic coupling hydraulic impact forming device and method. The two-stage magnetic coupling hydraulic impact forming device comprises a forming assembly, a first magnetic coupling assembly, a second magnetic coupling assembly and a control system. The forming assembly comprises a female die, a hydraulic cylinder filled with a liquid medium and a plunger part arranged in a sliding mode. One end of the hydraulic cylinder is in butt joint with the female die and a blank is placed. The first magnetic coupling assembly is arranged at the end, away from the female die, of the hydraulic cylinder and drives the plunger part to push the liquid medium through a coupling magnetic field to apply axial extrusion force to the blank. The second magnetic coupling assembly is arranged at the end, close to the female die, of the hydraulic cylinder and drives the blank to generate controllable radial deformation through a coupling magnetic field. The control system is in communication connection with the two magnetic coupling assemblies to achieve synchronous work. Through the synergistic effect of the axial extrusion force and the radial electromagnetic force, the blank is evenly stressed, excessive reduction of the wall thickness is restrained, the defects of stress concentration, cracking and the like are reduced, and the size precision of a formed part and the yield of finished products are remarkably improved.

1. Name of the product in this design: Airborne radial hydraulic impact drilling rig. 2. Purpose of this design: for tunnel construction. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention provides a construction method and system for eliminating water seepage points of a pool, and the method comprises the following steps: a drilling step: a percussion drill or a hydraulic percussion drill is adopted to drill the leakage points of the side wall of the pool, and the drilling depth is not less than two thirds of the thickness of the side wall of the pool; cleaning and mounting: washing and cleaning the drilled hole; high-pressure glue injection is conducted, specifically, high-pressure glue injection equipment is connected to the top of the expansion screw, and waterproof glue is injected into the expansion screw through high pressure; cutting: after the waterproof glue in the expansion screw is completely dried, cutting the expansion screw by adopting an angle grinder, so that the expansion screw is flush with the surface of the side wall of the pool; and an anti-corrosion treatment step: carrying out anti-corrosion treatment on the exposed expansion screw. According to the method, the leakage points on the side wall of the pool can be accurately treated, and the waterproof glue can fully fill water seepage gaps under the high pressure effect, so that the leakage points are effectively blocked, the waterproof performance of the pool is greatly improved, and reworking caused by improper treatment of the leakage points in the pool construction process is avoided.

Rock drilling machine (10) comprising a hydraulic percussion unit (11) including a percussion piston (12) for providing percussive impulses to a shank adapter (13) of the rock drilling machine (10) in a forward direction (Dfwd), the shank adapter (13) being configured to be connected to a drill string (6) during operation. A hydraulic damper unit (14) is arranged for damping the recoil movement of the shank adapter (13) in the backward direction (Drev), and a hydraulic extractor unit (16) is arranged for actuating the shank adapter (13) in the backward direction (Drev). The rock drilling machine comprises an inlet coupling (Cp) for connection to a pressure source (P) of pressurised hydraulic fluid and an outlet coupling (CT) for connection to a tank (T) for non-pressurised hydraulic fluid. Further, the inlet coupling (Cr) is connectable to both the hydraulic damper unit (14) and the hydraulic extractor unit (16). The disclosure also relates to a drill rig comprising such a rock drilling machine. (FIG. 4)

The utility model belongs to the technical field of automobile suspensions, and particularly relates to an air spring shock absorber assembly structure. According to the hydraulic shock absorber, a buffer column is arranged at the bottom of a lower cavity, and a buffer sleeve synchronously and axially reciprocates along with a piston is arranged on the piston, so that the buffer column enters and exits from an inner cavity of the buffer sleeve; when the buffer column blocks the lower end opening of the buffer sleeve, an annular cavity is defined by the outer wall of the buffer sleeve, the side wall of the buffer column and the side wall of the lower cavity, oil in the annular cavity enters the upper cavity through the throttling pipeline and the first throttling channel, the throttling pipeline limits the flow of the oil entering the upper cavity, the downward pressing damping force of a piston is increased, and the damping performance of the damper is improved. And when the buffer column shields the inner port of the throttling pipeline, the flow of the throttling pipeline is limited, the downward pressing damping force of the piston is increased again, and the damping performance of the damper is further improved. The air spring shock absorber assembly structure adopts the shock absorber, the structure is simple, the space of an air chamber of the air spring and the installation space needed by the air spring are reduced, and installation is convenient.

The utility model relates to the technical field of squeezing device discloses a squeezing device, the top of bottom support frame is fixedly connected with vertical rod, the top of vertical rod is fixedly connected with bearing top board, the top of bearing top board is fixedly connected with installation card frame, the inside joint of installation card frame has the hydraulic cylinder, the output fixedly connected with squeezing round plate of hydraulic cylinder. The utility model discloses the sliding connection design of setting up mobile sliding rail and moving wheel, makes squeezing sleeve freely in and out along the sliding rail, and the convenient loading, unloading and cleaning operation, the further promotion equipment stability of symmetrical distribution's sliding rail, prevents the inclination or the jamming of partial load, through setting up the screw thread cooperation of limiting rotation plate and limiting screw rod, can be through the axial fixed of rotating adjustment to squeezing sleeve, ensures the sleeve position stability in the squeezing process, avoids the displacement of hydraulic impact, and the balanced stress of symmetrical distribution's limiting component, prolongs the equipment life.

A groove (2) is axially formed in the inner wall of a barrel body base body (1), and when a piston valve system (3) moves to a groove area, a hydraulic oil medium of the shock absorber and the groove form a bypass oil way through a radial gap of a piston sealing ring. The groove is formed in the middle section of a piston stroke and the tail section of a compression or stretching stroke; the cross section of the groove is rectangular, semicircular, V-shaped or trapezoidal; the depth of the groove is 0.5-2 mm, and the width of the groove is The adjustment of the damping characteristic of the shock absorber can avoid the design change of a piston valve system, and the specific damping characteristic is flexibly realized; the damping force is effectively reduced under the low-speed and small-amplitude vibration working condition, and the riding comfort of an automobile is improved; under the working condition of high-speed large-amplitude vibration, the damping force of the shock absorber is maintained or enhanced, and the operation stability of an automobile is ensured. The invention is suitable for a single-cylinder or double-cylinder hydraulic shock absorber and a passive suspension system, and is compatible with an electromagnetic valve active control system.

The purpose of the present invention is to appropriately generate a damping force at the start of compression after a piston rod is completely elongated while alleviating shock when the piston rod is completely elongated with a simple structure. A hydraulic shock absorber (10) is provided with: a rod guide (21) that guides a piston rod (11) so that the piston rod (11), which advances and retreats in an oil chamber (14) in a cylinder (12), can slide freely, and that forms a rebound oil chamber (20) that generates a damping force when the piston rod (11) is fully extended; a rebound stopper (19) fixed to the piston rod (11); and a springback valve (23) that enters the springback oil chamber (20) when the piston rod (11) is fully extended. The spring-back valve (23) is mounted to the spring-back stopper (19) so as to be inching in the axial direction (D) of the piston rod (11), and includes a first flow path (P1) of oil for releasing the pressure of the spring-back oil chamber (20) at the start of compression after the piston rod (11) is completely elongated.

This utility model relates to the field of hydraulic cylinder technology and discloses a buffer sealing structure for resisting hydraulic shock. It includes a cylinder body with an oil inlet and an oil outlet sequentially installed from front to back on the top of the cylinder body. An oil chamber is formed in the middle of the cylinder body. A piston block is slidably connected inside the cylinder body, located in the middle of the oil chamber. A piston rod is slidably connected to the middle of the cylinder body, and the piston rod is connected to the piston block. A sealing ring is installed on the outer periphery of the piston block. A movable ring is slidably connected to the middle of the piston block, and a buffer pad is installed on the outer side of the movable ring. In this utility model, when the piston block slides in the oil chamber and approaches the end of the cylinder body, the buffer pad contacts the inner wall of the cylinder body end, thereby pushing the movable ring to compress the compression spring. The compression spring absorbs and reduces the impact force, while the buffer pad prevents further absorption and reduction of impact force and avoids wear caused by collision.

The utility model relates to the technical field of hydraulic impact hammers, in particular to an anti-corrosion shell of a hydraulic impact hammer, which comprises an anti-corrosion mechanism and a connecting mechanism, as well as a first connecting groove, a first connecting plate, a first preformed hole, a first connecting bolt, a second connecting groove, a second connecting plate, a second preformed hole and a second connecting bolt which are arranged through the connecting mechanism, the first protective shell, the second protective shell, the third protective shell and the fourth protective shell can be correspondingly connected into a cuboid, in the actual use process, the bottom end of a hydraulic impact hammer rod is wrapped in the cylindrical mounting groove, the sealing performance of the anti-corrosion shell is improved through the arrangement of a sealing gasket and a water stop sealing strip, and the assembled shell is easy to operate and convenient to use. Assembly and disassembly are convenient, and the operation efficiency is improved. And through the arrangement of the phenolic resin paint layer, the epoxy phenolic paint layer, the epoxy resin coating layer and the pyranoid resin paint layer on the anti-corrosion layer, the anti-corrosion effect of the anti-corrosion shell is improved, so that the use durability of the shell is improved.

The application discloses a railway wagon running device and relates to the technical field of running devices, which comprises two symmetrical bottom frame mounting seats, axle box assemblies arranged on the corresponding bottom frame mounting seats, wheel pairs connected between the two axle box assemblies through bearings at two ends, a brake device arranged between the two bottom frame mounting seats and fixed below a vehicle body bottom frame, a traction pull rod arranged between the axle box assemblies and the bottom frame mounting seats in cooperation, two suspension springs, a vertical hydraulic shock absorber and a transverse hydraulic shock absorber. The application has the advantages of compact structure, light weight, reduced self weight of the whole vehicle, improved vehicle operation benefit, stable vehicle operation ensured by the cooperation of the suspension springs, the vertical hydraulic shock absorber and the transverse hydraulic shock absorber.

The present invention circumvents a rapid pressure rise due to hydraulic shock while making it possible to maintain a good closed state.　The present invention comprises: a contact part 24a which is brought into contact with a valve seat; a deformation part 24b which is elastically deformed during opening and closing; and a plate-shaped part 25 which is formed from a material having a higher hardness than the contact part 24a and the deformation part 24b, and to which the contact part 24a and the deformation part 24b are attached. The plate-shaped part 25 is provided with a protruding part 25a that is inserted into a cylindrical part, the tip of which is provided with the valve seat. The contact part 24a is provided with an insertion hole 24ha through which the protruding part 25a can be inserted, and an annular projection 24p that surrounds the insertion hole 24ha, has a diameter smaller than the inner diameter of the cylindrical part, and projects in the seating direction of the contact part 24a with respect to the valve seat. The annular projection 24p has a projection length defined such that the insertion length into the cylindrical part when the contact part 24a is seated on the valve seat is shorter than the insertion length of the protruding part 25a into the cylindrical part.

The utility model discloses a guiding and conveying device for wire and cable production, which comprises a base, the upper end of the base is fixedly connected with a fixed limiting assembly, the upper end of the fixed limiting assembly is provided with a movable limiting assembly, and the two sides of the fixed limiting assembly and the two sides of the movable limiting assembly are respectively provided with an expansion assembly. The length of the fixed limiting assembly and the length of the movable limiting assembly can be expanded through the arranged expansion assembly, adjustment can be conveniently conducted according to needs, a screw can be driven to rotate by rotating an adjusting knob, and therefore the movable limiting assembly can be driven to move through a limiting rod; the distance between the movable limiting assembly and the fixed limiting assembly is adjusted, so that the distance between limiting wheels can be adjusted, the electric wire cable is conveniently clamped and limited through the limiting wheels, the electric wire cable can be guided and conveyed, and an arranged hydraulic shock absorber can play a role in buffering and shock absorption.

The invention discloses a flushing-reducing backwashing filter for a fully-mechanized coal mining hydraulic support of a coal mine. Comprising a main valve body, a first electromagnetic pilot valve arranged on the main valve body, a first valve element assembly arranged in a first valve cavity of the main valve body, a second valve element assembly arranged in a second valve cavity of the main valve body, a first filtering assembly arranged in a third valve cavity of the main valve body and a second filtering assembly arranged in a fourth valve cavity of the main valve body. The second valve cavity communicates with the fourth valve cavity, and the first electromagnetic pilot operated valve is arranged to be used for adjusting the opening degree of the first valve element assembly. Through cooperation of the first electromagnetic pilot valve and the first valve element assembly, the impact-reducing back-flushing filter for the fully-mechanized coal mining hydraulic support has the function of reducing the starting impact of a hydraulic cylinder, and when the filter is used in the fully-mechanized coal mining hydraulic support, the hydraulic impact generated when the hydraulic cylinder is started can be reduced, and the pressure and flow of a working oil port can be stabilized; and meanwhile, the valve element assembly and the filtering assembly are arranged in the same main valve body, so that the integration level is improved.

This invention discloses a sensorless multi-stage tower erection mechanism and its control method. The method includes: establishing a state machine with multi-stage action interlocking and setting a virtual position counting variable; when each stage of the multi-stage telescopic boom extends, the counting variable changes along a first direction and the hydraulic drive unit switches its speed accordingly each time the interval proximity switch is triggered, until the approach switch is triggered when the boom reaches its final position and stops; when each stage of the multi-stage telescopic boom retracts, the counting variable changes along a second direction and the hydraulic drive unit switches its speed accordingly each time the interval proximity switch is triggered, until the approach switch is triggered when the boom reaches its final position and stops. This invention utilizes only inexpensive proximity switches in conjunction with dual trigger blocks and counting logic to achieve a servo-like "slow-fast-slow" S-shaped speed curve, solving the hydraulic shock problem caused by the lack of a displacement sensor, eliminating the risk of disordered multi-stage action sequence, and achieving high safety.

This invention relates to the field of slewing drive technology, and discloses a sliding system, adjustment method, and engineering machinery. The sliding system of this invention is applied to the slewing mechanism of engineering machinery, including a hydraulic oil tank, a hydraulic motor, a first pipeline, a second pipeline, and a slewing control module. The hydraulic motor is connected to the hydraulic oil tank, and the two pipelines are respectively connected to its inlet and outlet ends. The slewing control module includes a slewing directional valve, a free-slide proportional valve, and two slewing balance valves. The slewing directional valve can switch between blocking and conducting positions. The slewing balance valve has a load feedback valve core. The free-slide proportional valve is connected in parallel to two pipelines and is connected to a bypass oil circuit and the main machine tilt sensor. Its opening degree is controlled by its current signal. The sliding system of this invention can achieve stepless speed regulation of slewing, reduce hydraulic shock, and prevent slippage by maintaining pressure through the slewing balance valve. Compared with mechanical speed regulation, it is smoother and can achieve independent control of forward and reverse rotation, improving operational safety and stability.

The utility model relates to the technical field of ground penetrating radars, and discloses a vehicle-mounted ground penetrating radar device which comprises a vehicle carrier and a second supporting connecting plate, the rear side of the vehicle carrier is connected with a detection mechanism in a sliding mode, the top of a support is fixedly connected with a damping assembly, and the damping assembly comprises a base. Two flange connectors are slidably connected to the top side of the interior of the base, connecting bases are fixedly connected to the tops of the flange connectors, hydraulic shock absorbers are fixedly connected to the tops of the connecting bases, and first springs are fixedly connected to the tops of the connecting bases. According to the utility model, the hydraulic shock absorber and the connecting seat at the bottom of the support are matched with the first spring to effectively absorb road bumping, the hydraulic shock absorber is matched with the second sucker through the first sucker to support replacement of the air pressure spring, improve vibration isolation effect and efficiency, save installation time, and dynamically adjust detection depth and enhance reliability during advancing; and the system performance is optimized.

This invention discloses a method and system for ensuring navigation safety in a multi-level water-saving ship lock based on digital twins. The method includes: collecting multi-source sensor data, generating an aligned data stream and quality assessment report, and updating the digital twin state; using the aligned data stream and quality assessment report, obtaining the mooring force probability distribution through non-contact observation and probabilistic fusion; identifying the hydraulic shock response based on the digital twin state and the aligned data stream, and generating a vibration-suppressing opening template using hydraulic phase-locked tracking; within the digital twin system, integrating the mooring force probability distribution and the vibration-suppressing opening template, performing sub-Bruker stochastic control barrier optimization, and outputting an executable valve trajectory. This invention can actively suppress water hammer oscillations and provide robust safety guarantees for uncertain mooring forces, effectively improving the navigation safety of large water-saving ship locks.

The invention relates to a hydraulic shock absorber (1) comprising a body (2), a rod (4) connected to a main piston (3), dividing the body (2) into a first (5) and a second (6) chamber and comprising a first housing receiving a first piston (8) sliding from a first rest position under the effect of an increase in fluid pressure in the first chamber (5), the main piston (3) comprising a first preload passage allowing unidirectional fluid communication, in a first direction of flow, between the first (5) and second (6) chambers, each first piston (8) comprising a first channel for progressively opening or closing a first preload passage depending on the position of the first piston (8), each first passage comprising blocking means for blocking the fluid in the first direction of flow when the pressure upstream of the first passage is less than a threshold pressure. (Figure 1)

The invention belongs to the technical field of hydraulic shock absorbers, and particularly relates to a vacuum-pumping oil injection system which is characterized in that an extraction opening of an extraction pipe of a vacuum-pumping system and an oil injection opening of an oil injection pipe of an oil injection system are communicated with a cavity of a hydraulic shock absorber, so that the hydraulic shock absorber completes vacuum-pumping and oil injection operation at the same station, and the production efficiency is improved; the pumping pressurizing device and the gas storage tank are arranged on the vacuumizing system, so that the hydraulic shock absorber is vacuumized, and pumped gas is stored in the gas storage tank; the oil storage tank with the internal oil storage cavity and the compressed air cavity isolated from each other is arranged on the oil injection system, so that oil is pre-stored in the oil storage cavity and then injected into the hydraulic shock absorber through the oil injection pipe; the compressed air cavity is communicated with the air storage tank, so that oil in the oil storage cavity is rapidly pressed into the cavity of the hydraulic shock absorber under the dual action of the vacuum cavity of the hydraulic shock absorber and high-pressure air in the air storage tank, the oil injection operation is rapidly completed, air in the cavity of the hydraulic shock absorber is reduced, and the response speed of the hydraulic shock absorber is increased.

The invention relates to the technical field of swing arm support assemblies, in particular to an automobile rear independent suspension swing arm mounting support assembly which comprises a rear mounting support assembly, and an independent supporting assembly is arranged in the middle of the rear mounting support assembly. The rear installation support assembly is provided with a push rod suspension, a limiting assembly, a swing arm piece, a hub base and an outer tire from the independent supporting assembly to the two sides. A hub bearing is installed at one end of the swing arm piece and connected with a hub base, an outer tire is installed on the outer wall of the hub base through a connecting bolt, the rear installation support assembly is rotationally connected with a hydraulic shock absorber, a push rod suspension is arranged on one side of the hydraulic shock absorber, and an anti-inclination push rod is rotationally connected to the outer wall of the push rod suspension. One end of the anti-inclination push rod is rotationally connected with a swing arm piece. The problems that an existing independent suspension swing arm installation support is out of control in inclination of a vehicle body and lacks an auxiliary supporting structure when a tire bursts are solved.