45 results about "Hydrodynamic pressure" patented technology

The invention discloses a method and system for predicting the grouting effect of foaming type grout based on PSO-BP, and belongs to the field of grouting repair engineering.The method comprises the following steps that bedrock fracture characteristics are collected to obtain fracture opening, fracture roughness and hydrodynamic pressure, meanwhile, grouting influence factor data are obtained, the grouting influence factor data comprise the grouting amount, the grout component proportion and the grouting pressure, and the grouting influence factor data comprise the grouting amount, the grout component proportion and the grouting pressure; the method comprises the following steps: dividing fracture opening, fracture roughness, hydrodynamic pressure and grouting influence factor data into a training set and a test set by using a PSO-BP neural network model, generating a grouting diffusion distance prediction model and a grouting water plugging rate prediction model, predicting the test set through the generated models, obtaining predicted values of the grouting diffusion distance and the grouting water plugging rate, and predicting the grouting diffusion distance and the grouting water plugging rate according to the predicted values of the grouting diffusion distance and the grouting water plugging rate. And according to the two groups of predicted values and measured values, calculating to obtain a mean square error, a mean absolute error and a decision coefficient corresponding to each group to evaluate the prediction effect of the slurry grouting effect. According to the method, accurate prediction of the grouting repair effect of the foaming slurry is realized through the PSO-BP neural network.

The invention relates to a stress calculation method, device, equipment and medium for a floating type draught fan foundation structure, and the method comprises the steps: carrying out the frequency domain potential flow water power analysis of a wet surface element model of a foundation floating body of a floating type draught fan, and obtaining the water power pressure distribution and a water power coefficient; boundary conditions are applied to the simulation model of the floating type wind turbine foundation structure, various working conditions are loaded, finite element analysis is carried out based on hydrodynamic pressure distribution, and various structural stress transfer functions are obtained; based on the hydrodynamic coefficient, performing linear processing on the fan aerodynamic force, the impeller pneumatic torque, the floating body hydrodynamic force and the mooring restoring force of the floating fan and the influence of a fan servo controller on the floating fan, and substituting a linearization result into a motion equation of the floating fan for calculation to obtain a plurality of dynamic response spectrums; and multiplying the structural stress transfer functions by the corresponding dynamic response spectrums, and adding a plurality of multiplied results to obtain a total stress spectrum. The method can improve the efficiency.

The embodiment of this specification relates to a position-controlled suspension centrifugal blood pump, which is a "pump-motor integrated" device. The blood pump includes: a pump housing, a rotor, an impeller, a servo motor, an inner magnetic core group, an outer magnetic ring group, and a position-control bearing; the rotor and the impeller are seamlessly connected. The rotor is arranged in the inner tube of the blood pump and is driven by the servo motor to drive the impeller to do work; the inner magnetic core group is composed of multiple round magnetic pieces and is built in the top end inside the rotor. The outer magnetic ring group is composed of multiple magnetic rings and is sleeved on the outer wall of the inner tube; the position-control bearing is composed of ceramic balls and ceramic sockets. The top end of the impeller blade has an inclined surface, which can generate hydrodynamic pressure when the pump is working. According to the technical solution of the present invention, the rotor and the impeller can be position-controlled and suspended in all directions, overcoming the friction effect of mechanical bearings. The internal structure of the pump is simple and smooth, which can greatly reduce hemolysis and thrombus complications; the blood pump is small in size and light in weight, with less surgical invasiveness, and can improve safety and practicability.

The invention provides a rectangular open channel automatic flow measurement method and system based on multi-flow-layer water flow pressure monitoring, electronic equipment and a storage medium, and the method comprises the steps: measuring the water level information of a to-be-measured drainage basin in real time through an ultrasonic water level gauge; dividing the flow section of the rectangular open channel in the to-be-detected drainage basin into a plurality of flow layers from bottom to top; according to the water level information, the hydrodynamic pressure value of each flow layer in the flow cross section is calculated, and the hydrodynamic pressure value is converted into the water flow velocity value of the corresponding flow layer; calculating the flow of each flow layer based on a flow velocity area method according to the water flow velocity value, and accumulating the flow of each flow layer to obtain the flow of the rectangular open channel; the method has the advantages that manual intervention is not needed, operation is easy, high applicability and real-time performance are achieved, cost is low, high-cost equipment does not need to be used, the measuring effect is accurate, and the method can be suitable for the complex fluid flowing environment; the method is suitable for the rectangular open channel flow measurement field.

The invention discloses a medical bone fracture plate ultrasonic magnetic ball magneto-rheological composite polishing machine which comprises a polishing groove, a first driving motor for driving the polishing groove to rotate, a polishing disc arranged in the polishing groove and a second driving motor for driving the polishing disc to rotate, a polishing piece is fixed to the bottom of the polishing disc, a permanent magnet is fixed to the polishing disc, and the permanent magnet is fixed to the polishing disc. A plurality of magnetic balls are arranged at the bottom of the polishing groove, magneto-rheological polishing liquid is arranged in the polishing groove, the polishing piece is immersed in the magneto-rheological polishing liquid, and the polishing groove is further connected with an ultrasonic vibrator. The invention further discloses a method for calculating the surface pressure of the polished part. The pressure is calculated through the pressure formed by ultrasonic vibration and the cavitation effect, the hydrodynamic pressure formed on the surface of the workpiece when the magnetorheological polishing fluid flows and the pressure formed on the surface of the workpiece by the gradient magnetic field. The polishing device has the advantage that the polishing efficiency and the polishing effect are remarkably improved.

The invention relates to a bridge foundation structure seismic oscillation water added mass test measurement method and device, and the method comprises the steps: driving a test structure to carry out an immersion transient motion test, and collecting the test pressure data of the surface of the test structure and the test acceleration data of the test structure; based on the test pressure data of the surface of the test structure, obtaining a resultant force integral result Pt (zj) of the dynamic water acting force at unit height of the test structure; and obtaining the dynamic water additional mass ma (zj) of the test structure based on the integral result Pt (zj) of the unit height dynamic water acting force resultant force of the test structure and the test acceleration data # imgabs0 # of the test structure. According to the method, the dynamic water pressure data of the surface of the test structure is calculated through an integral algorithm, the elevation distribution of the dynamic water acting force of the surface of the test structure along the structure is obtained, and the elevation distribution of the dynamic water additional mass of the test structure along the test structure is further obtained according to a structural kinetic equation; and the accuracy and reliability of the measured result can be improved according to the time-history measurement fluctuation and the dynamic water additional mass change rule.

This invention provides a method and system for stress analysis of subsea tunnel support structures, relating to the field of subsea engineering technology. The method includes: acquiring and comparing the differences between exploration data of the first geological layer after excavation and exploration data of the second geological layer before initial shotcreting of the tunnel cross-section to obtain fissure anomaly increment data; obtaining a first gain factor and a second gain factor affecting the formation of the water pressure field based on the first hydrodynamic pressure data and the fissure anomaly increment data; and continuously optimizing and adjusting the cumulative support strength corresponding to the corresponding support sub-process and the geological layer anomaly increment data corresponding to the second geological layer exploration data based on the first gain factor, the second gain factor, and the second hydrodynamic pressure data corresponding to each support sub-process in the initial support, to complete the stress reliability analysis of the initial support structure. The method and system provided by this invention can effectively ensure the safety of tunnel support.

The application discloses a kind of magnetic liquid double-suspension mixed-flow blood pump, comprising: pump shell, impeller, for driving impeller rotation drive motor, front magnetic bearing and rear magnetic bearing, pump shell is provided with pump outer tube, coaxially nested in pump inner tube in pump outer tube and is communicated in the pump cavity of pump inner tube lower end;Impeller includes the screw rod type impeller of front section and the vertical sheet type impeller of rear section, screw rod type impeller is coaxially arranged in pump inner tube, and vertical sheet type impeller is arranged in pump cavity;Vertical sheet type impeller has multiple vertical blades in radial, and the upper and lower end surfaces of multiple vertical blades are all provided with inclined surface, and two inclined surfaces on each vertical blade and the upper and lower two sides of the inner wall of pump cavity are all formed with wedge-shaped hydrodynamic pressure structure with big upcurrent port and small backflow port.The application magnetic liquid double-suspension mixed-flow blood pump adopts double-suspension mechanism of magnetic suspension and hydraulic suspension, can improve the stability and reliability of blood pump, and also greatly improves the work efficiency.

The invention discloses a seismic hydrodynamic pressure effect prediction method for a rectangular-section pier. The method comprises the steps of generating artificial seismic waves; drawing up the size and material parameters of the bridge pier; carrying out pier dynamic response simulation; determining a dynamic response increase rate; fitting a relation equation of the ratio of the water depth to the pier height, the section length-width ratio, the ratio of the upper structure mass to the pier mass and the dynamic response increase rate of the pier; determining a relation equation of a ratio of water depth to pier height, a section length-width ratio, a ratio of upper structure mass to pier mass and a dynamic response increase rate of the pier under different pier height-width ratios; and establishing a prediction equation of the dynamic response increase rate of the pier with any parameter. During anti-seismic design of wading piers such as sea-crossing and river-crossing, complex numerical simulation is not needed for the hydrodynamic pressure effect caused by an earthquake, the earthquake hydrodynamic effect can be considered only by multiplying the structural response by a corresponding amplification coefficient through a traditional non-wading pier anti-seismic design method, calculation is simple, efficiency is high, and the method is suitable for large-scale popularization and application. And the bridge aseismic design application is facilitated.

The invention provides a seal ring capable of maintaining parallelism between sliding surfaces. The seal ring (3) is provided with: a sliding surface (3a) provided with a dynamic pressure generation groove (36) that generates dynamic pressure by rotationally sliding relative to one of the shaft (1) and the housing (2) into which the shaft (1) is inserted; an installation surface (3b) that intersects the sliding surface (3a) and is provided on the other of the shaft (1) and the housing (2); the seal ring (3) is provided with a recess (37) on a surface facing the other of the shaft and the housing, the recess opening to the other of the shaft (1) and the housing (2).

The invention discloses a method for enhancing flowing and lubricating performance of lubricating oil of a rolling bearing, which comprises the following steps of: communicating a lubricating oil film convergence area and a lubricating oil film divergence area formed between a rolling body and two side surfaces of lintels by utilizing two slot gap type through cavities additionally arranged on each lintel; and the lubricating oil is driven to flow from the lubricating oil film convergence area of the lintel to the lubricating oil film divergence area through the slot-type through cavity by utilizing the pressure difference formed by the fluid dynamic pressure effect and the cavitation phenomenon, so that the flowing and lubricating performance of the lubricating oil is enhanced, and the extrusion jet between the rolling body and the lintel and the oil film cavitation degree are reduced. According to the method, the stable lubricating oil flowing self-enhancing effect near the friction surface can be achieved through the slot gap type through cavity additionally formed in the lintel, the extrusion jet and the oil film cavitation degree near the friction surface between the rolling body and the retainer are effectively reduced, and the lubricating oil near the friction surface can be organized more efficiently; friction resistance and abrasion conditions are reduced, and the heat dissipation capacity of the bearing is improved.

The application provides a dam-reservoir hydrodynamic fluid-solid coupling simplified efficient calculation method and application, the reservoir is discretized by SBFEM or FEM, and the hydrodynamic pressure additional mass matrix is calculated; according to the physical meaning and characteristics of the additional mass matrix, the hydrodynamic pressure additional mass matrix is simplified, the calculation time consumption is greatly reduced, and the calculation efficiency is improved under the premise of ensuring good precision, the simplified efficient calculation and analysis of the dam-reservoir hydrodynamic fluid-solid coupling under the condition of earthquake can be realized, the numerical calculation result has higher precision, the coupling calculation time consumption is greatly reduced, an accurate and efficient method is provided for the dam-reservoir hydrodynamic fluid-solid coupling analysis and anti-seismic safety evaluation, and technical support is provided for the application of the dam fluid-solid coupling analysis method in practical engineering or large-scale dam dynamic fine analysis.

The invention is suitable for the cross technical field of computational fluid mechanics and structural engineering, and relates to a nonlinear liquid sloshing proportion boundary finite element numerical simulation method, which comprises the following steps of: S10, tracking the motion of a liquid free surface by adopting a semi-Lagrange method, and deducing a nonlinear sloshing motion equation under pitching excitation by utilizing speed potential; s20, creating a nonlinear liquid sloshing model under a proportional coordinate system and establishing a proportional boundary finite element system equation; s30, performing time domain solution by using a second-order Runze-Kutta algorithm to ensure accurate time update of the physical variables and gradients thereof; and S40, simplifying the control equation and the boundary condition into a second-order ordinary differential equation by using a weighted residual method, obtaining the free liquid level elevation change by solving the equation, and calculating the hydrodynamic pressure on the liquid container by using a Bernoulli equation. The method is simple in process, the calculation process is convenient and efficient, and the prediction precision and efficiency of numerical simulation under the swing excitation working condition are effectively improved.

A method for measuring the hydrodynamic pressure of a bilge keel on a surface ship includes: 1. Determining the main structure and bilge keel structure of a ship model, with a scale ratio of λ, and determining the positions of n measurement nodes located on the lower surface of the bilge keel; 2. Modeling the ship model from step 1 and comparing the strain at each measurement node with the strain at the lower surface of the bilge keel by applying water pressure, and calculating the strain transfer coefficients C1 to C2 corresponding to the n measurement nodes. n 3. Construct the boat model from step 1, and conduct a water immersion test in the test tank to obtain the water velocities V1 to V at n measurement nodes. n The micro-strain με1~με at n measurement nodes was measured. n 4. Obtain the hydrodynamic pressure P at the measurement node of the ship model. i :P i =με i / C i , i = 1, 2, 3…n; V. Obtain the actual ship hydrodynamic pressure SP at the corresponding measurement node positions of the bilge keel on the actual ship. i And the actual ship's entry speed SV i SP i =λ×P i This allows us to obtain hydrodynamic pressure data for the bilge keel under different working conditions, which can be used to assist in bilge keel design and improve the reliability of the bilge keel structure.

The utility model discloses a dynamic water pressure measuring device. Comprising a shell, an end cover used for sealing the shell, a bearing plate located outside the shell and used for bearing dynamic water pressure, and a strain gauge arranged inside the shell and used for measuring the dynamic water pressure. The connecting rod is fixedly connected with the bearing plate, and one end of the connecting rod extends into the shell and is used for triggering the strain gauge; and the reset spring is arranged in the shell and is used for resetting the bearing plate. According to the utility model, the bearing plate is directly contacted with mud-containing water flow, the hysteresis effect caused by a permeable structure of a traditional water pressure sensor can be eliminated, the precision of a measurement result can be improved, the bearing plate does not influence the measurement result due to mud accumulation, and the overall practicability can be improved; according to the utility model, the reset spring is arranged, so that the bearing plate can be quickly reset, and the overall response speed and the measurement precision can be improved.

The invention discloses a stepped grinding and polishing processing method for regulating and controlling the removal scale of a plastic domain by a magnetic field, which comprises the following steps: starting an electromagnet device, regulating current to generate a magnetic field vertical to the surface of a workpiece, and enhancing the plastic domain range of the surface layer of the workpiece; the grinding depth of the grinding wheel is controlled to be larger than zero and smaller than the magnetic brittle-plastic transformation critical cutting depth, and grinding is conducted; the grinding depth of the grinding wheel is controlled to be zero, magnetic force rheological grinding and polishing liquid is supplied to a grinding area, and grinding-polishing combined machining is conducted on the surface of the workpiece; controlling the clearance between the grinding wheel and the workpiece surface to be greater than zero, and adjusting the magnetic field intensity according to the clearance to control the shear stress of the abrasive cluster; the abrasive clusters are formed by the synergistic effect of magnetic field force and a hydrodynamic pressure field; and the polishing depth is controlled to be smaller than the magnetic brittle-plasticity transformation critical cutting depth by adjusting the grinding wheel feeding depth, the rotating speed and the workpiece feeding speed, and the surface of the workpiece is polished. According to the method, the damage depth can be quantitatively controlled, positioning errors caused by secondary clamping are avoided, and the method is high in universality and easy to implement.

This invention provides a self-circulating flushing sealing assembly, method, and pump device, including a housing with a mechanical seal cavity, a rotating shaft, a sealing friction pair, and a partition structure. The rotating shaft is rotatably inserted into the housing and penetrates the mechanical seal cavity. The sealing friction pair includes a rotating ring disposed on the rotating shaft and a stationary ring disposed on the housing, and the rotating ring and stationary ring can fit and seal within the mechanical seal cavity. The partition structure divides the mechanical seal cavity into a communicating inner cavity and an outer cavity. The inner cavity is located outside the sealing friction pair. When the rotating shaft is rotating, fluid in the inner cavity can flow into the outer cavity under pressure and then flow back to the inner cavity to cool and / or lubricate the sealing friction pair. By placing the inner cavity outside the sealing friction pair, this invention allows the inner cavity to automatically generate stable hydrodynamic pressure when the rotating shaft rotates, thereby driving the fluid to form a self-circulating flow independent of external systems, continuously cooling and lubricating the sealing friction pair, and improving the working conditions of the sealing friction pair.

The application belongs to the technical field of hydraulic engineering, and specifically provides a rock scouring test device and method based on Bernoulli's law and considering dynamic water pressure, which comprises a scouring bin mechanism, the scouring bin mechanism comprising a shell, one end of the shell being provided with a transition shell, and the lateral wall of the shell being circumferentially provided with a plurality of extension holes; a plurality of pulling mechanisms, each pulling mechanism comprising a pulling rod, one end of the pulling rod being connected with a test piece clamp, the other end of the pulling rod being provided with an operating rod, the operating rod being arranged perpendicularly to the pulling rod, the end of the operating rod being provided with an external thread, a nut being arranged on the operating rod and matched with the external thread, and a limiting piece being arranged on the operating rod; a pulling adjustment mechanism, the pulling adjustment mechanism comprising a ring, a plurality of arc-shaped holes being arranged on the ring and corresponding to the pulling rods, the operating rod being limited by the nut and the limiting piece after penetrating into the arc-shaped hole; and a water supply mechanism for supplying water to the scouring bin mechanism. The device and method can simply and conveniently simulate the condition of water flow scouring the rock joint surface and are easy to operate.

The invention discloses a deep-sea large-diameter pile group foundation underwater vibration table test model design method, and relates to the technical field of civil engineering, and the method comprises the steps: determining a test scale ratio and a similarity ratio according to a prototype pile group foundation pile foundation and a test environment; obtaining an ideal material model after scale reduction according to the test scale reduction ratio and the similarity ratio; equivalently replacing the pile foundation and the bearing platform of the test model according to the ideal material model; mounting holes are reserved in the pile foundation and the bearing platform of the test model, the hydrodynamic pressure gauges are embedded into the reserved mounting holes, and the hydrodynamic pressure gauges are led out from the interior of the pile foundation of the test model or the reserved holes of the bearing platform to the top of the test model through wires and then connected into an acquisition system for data acquisition. According to the method, the underwater vibration table model suitable for the deepwater large-diameter pile group foundation is constructed through similar skills, the method is suitable for a pile group structure, the detection data quality is improved by embedding the hydrodynamic pressure gauges into the reserved holes, the deepwater large-diameter pile group foundation test model is constructed, an earthquake simulation underwater vibration table test is carried out, and a good effect is achieved.

The application belongs to the field of hydrodynamic pressure polishing, and discloses a high-speed micro-gap polishing online measurement and control method and a measurement and control system thereof, which comprises the following steps: step 1, mounting a workpiece on a workpiece disc of a lifting force suspension polishing device, and installing a gap measurement and control device on one side of the lifting force suspension polishing device, wherein a high-speed camera in the gap measurement and control device faces the work disc of the lifting force suspension polishing device from the side; step 2, starting the suspension polishing device and the gap measurement and control device, polishing the workpiece by the suspension polishing device, and detecting the gap between the workpiece and the airfoil polishing disc by the gap measurement and control device at the same time; and step 3, polishing is completed, the motor is turned off, and the workpiece is taken out after the motor stops rotating. The high-speed micro-gap polishing online measurement and control method can measure the size of the polishing gap in real time during the polishing process, and adjust the polishing gap, thereby improving the polishing efficiency and quality.

This invention provides a method for predicting linear wave loads in ship structural design, relating to the field of ship engineering structural design technology. Based on optimized Latin hypercube sampling and three-dimensional potential flow calculation, this invention constructs a dataset of hydrodynamic pressure fields and load components under regular wave conditions. It extracts the basis function system and establishes a linear mapping relationship between the combination coefficients and the loads. For irregular wave sea states, it interpolates to determine the state transition matrix and control matrix. Combined with the main wave disturbance force, it performs a time-series recursion of the combination coefficients, triggering local transient calculations at preset intervals, and performing sparse verification corrections on the recursive state. Finally, it outputs the load history in real time through the mapping relationship and statistically analyzes the extreme values ​​to generate a wave load design parameter table. This method replaces full-order solutions with low-dimensional recursion, triggering a small number of full-order verifications at preset intervals. While maintaining prediction accuracy comparable to full-order solutions, it significantly reduces computation time, providing efficient and reliable load input for ship structural design.

This fluid dynamic pressure bearing comprises a shaft, a sleeve, and a lubricant. An upper outer-peripheral surface and / or an upper inner-peripheral surface has an upper dynamic pressure fluid dynamic pressure bearing comprising upper dynamic pressure grooves that induce a fluid dynamic pressure in the lubricant during rotation. In a first upper dynamic pressure groove row, a plurality of upper dynamic pressure grooves, which are inclined to one side in a circumferential direction while proceeding upward in an axial direction, are arranged in the circumferential direction. A second upper dynamic pressure groove row is disposed adjacent to the first upper dynamic pressure groove row on the lower side in the axial direction, and a plurality of upper dynamic pressure grooves, which are inclined to the other side in the circumferential direction while proceeding upward in the axial direction, are arranged in the circumferential direction. A third upper dynamic pressure groove row is disposed adjacent to the second upper dynamic pressure groove row on the lower side in the axial direction, and a plurality of upper dynamic pressure grooves, which are inclined to the one side in the circumferential direction while proceeding upward in the axial direction, are arranged in the circumferential direction.

The application provides a soil dry-wet cycle device with hydrodynamic pressure regulation function and a test method, wherein the soil dry-wet cycle device comprises a test table, a support, a water pump, a water storage tank and an automatic dry-wet cycle mechanism, the automatic dry-wet cycle mechanism comprises a sealing top cover, a dry-wet cycle chamber, a dryer, a soil sample mounting unit and a controller, the soil sample mounting unit comprises a fixing structure, a microporous diaphragm bottom plate, a soil ring knife positioning sleeve frame and a microporous diaphragm top plate, the microporous diaphragm top plate and the microporous diaphragm bottom plate both have water-permeable and air-permeable structures, a first electromagnetic valve is installed on a water inlet pipe, a second electromagnetic valve is installed on a lower drain pipe, dryers are fixedly arranged at air inlets, and the controller is connected with the water pump, the dryers, the first electromagnetic valve and the second electromagnetic valve; and the application further provides a test method. The application can realize automatic quantitative research on the influence of dry-wet cycles on soil characteristics under different conditions in large quantities, and can also research the influence of different ions on soil characteristics in dry-wet cycles.

The application discloses a seabed slope model box for simulating seabed moving water pressure waves, which comprises a seabed slope model chamber, a moving water pressure wave device, a power equipment chamber and a weight lowering device. The weight lowering device can lift the moving water pressure wave device assembly to hit the water body at the bottom of the model box, so as to stimulate the moving water pressure wave generated by the fault dislocation caused by the seabed earthquake, and then the real marine water environment simulation around the seabed slope in the earthquake process is realized. The application has the advantages of simple structure, simple driving force provided by the weight stack, manual remote control of the moving water pressure wave stimulation time, and indoor seabed slope test conditions which are more in line with the actual working conditions and easy to observe the results.

This disclosure provides a method and apparatus for iterative coupled hybrid experiments on fluid-structure interaction boundaries, applicable to fluid mechanics, solid mechanics, numerical simulation, and engineering fields. The experimental method includes: decomposing an initial fluid-structure interaction structure into multiple substructures, including physical and numerical substructures; determining the influencing factors of the experimental convergence index based on the response error between the physical and numerical substructures, where the response error characterizes the error between the input response information of the physical substructure and the output response information of the numerical substructure, and the influencing factors include the iterative algorithm and the substructures; updating the input response information, output response information, and substructures based on an algorithm optimization strategy and parameter update strategy using the iterative algorithm when the response error does not meet a preset error threshold, thereby obtaining the target structure; and determining the hydrodynamic pressure time history and target motion results based on the target numerical substructure, the target physical substructure, and the preset response flow.

The present invention provides a novel bearing cage. The cage is a cylindrical structure composed of a left ring, a right ring, and multiple cross beams connected between the two rings. Pocket holes for placing rolling elements are provided between adjacent cross beams. Fluid grooves are symmetrically arranged at positions corresponding to the cross beams on the two side rings of the cage. The fluid grooves are evenly distributed along the circumferential direction of the two side rings on the inner ring surface or the outer ring surface of the side rings, and the opening area of the fluid grooves is larger than the bottom area. When the cage is externally guided, the fluid grooves are axially penetrating outer ring concave portions formed on the outer guiding surface of the cage side ring; when the cage is internally guided, the fluid grooves are axially penetrating inner ring concave portions formed on the inner guiding surface of the cage side ring. By utilizing the hydrodynamic pressure characteristics, when the bearing rotates at high speed, the present invention can make the cage float on the rotation axis of the bearing, reduce the vibration and noise of the bearing, improve the rotation accuracy, and extend the service life of the bearing.

Provided is a sliding member capable of improving lubricity. A sliding member (10, 20) having a pair of sliding surfaces (11, 21) that rotate relative to each other, the sliding member (10, 20) partitioning a space (S1) for fluid to be sealed and a leakage space (S2), the sliding member (10, 20) having, on at least one of the sliding surfaces (11): a dynamic pressure generating groove (13); a fluid recovery tank (14) that is provided further toward the leakage space (S2) side than the dynamic pressure generation tank (13), and that has a pressure generation section (143), which is a circumferential end section, a curved section, or a bent section, on the downstream side in the relative rotation direction; and a surrounding groove (15) provided between the dynamic pressure generating groove (13) and the fluid recovery groove (14) in the radial direction and extending in the circumferential direction.

This invention discloses a multi-media adaptable hydrostatic-dynamic coupling fluid suspension bearing assembly, system, rotating machinery, and operating method, belonging to the field of fluid suspension support technology. The bearing assembly includes a bearing body and a bearing housing forming a constant pressure fluid chamber. The working surface has axially arranged annular static pressure grooves and circumferentially distributed helical dynamic pressure grooves. At the intersection of their projections, fluid inlet micro-holes connecting to the constant pressure chamber are provided, forming a distributed matrix throttling network. The fluid inlet micro-holes include three forms: equal-diameter channels, classic Venturi, and simplified Venturi, flexibly adapting to conventional liquids, gas-liquid two-phase flows, and conventional gases. The bearing body has composite sealing components at both ends and an optional cooling system. This invention achieves multi-media compatible support through a unified core geometric framework and a mass-parameter adaptation system. Furthermore, the distributed micro-hole matrix and grid channel topology endow the bearing with parallel fault tolerance and passive flow pattern adjustment capabilities, significantly improving the bearing's adaptability to various operating conditions.

The present invention provides a sliding member capable of exhibiting a sufficient foreign matter discharge effect in any case of high-speed rotation and low-speed rotation. A first dynamic pressure generating groove (13) and a second dynamic pressure generating groove (14) are formed in at least one of the sliding surfaces (11), and the first dynamic pressure generating groove (13) communicates with the space on the leakage side. The terminal position of the sealed fluid side of the second dynamic pressure generating groove (14) is closer to the sealed fluid side than the terminal position of the sealed fluid side of the first dynamic pressure generating groove (13). Furthermore, the second dynamic pressure generating groove (14) is provided with an extension part (14c), and the extension part (14c) protrudes from the terminal part of the first dynamic pressure generating groove (13) to the sealed fluid side. Table surfaces (19) are formed between the extension parts (14c) of the second dynamic pressure generating grooves (14) adjacent to each other in the circumferential direction. A dynamic pressure generation region (15) comprising a plurality of minute recesses (16) that do not communicate with both the space (S2) on the fluid side to be sealed and the space (S1) on the leakage side is formed at a position closer to the fluid side to be sealed than the terminal ends (14b) of the second dynamic pressure generation grooves (14) adjacent in the circumferential direction.

The invention discloses a device and a method for simulating deep hydrodynamic pressure wave generation and water-rock interface propagation action, and the device comprises a gas source device which is used for providing gas with different pressure intensities; the stress pulse excitation device is used for exciting multi-waveform dynamic stress waves; the hydrodynamic pressure wave excitation and fluid-solid coupling action device is used for exciting and transmitting hydrodynamic pressure waves and realizing hydrodynamic pressure wave propagation and action under high stress of a water-rock interface; the initial water pressure loading device is used for storing a fluid medium and providing initial pressure for the dynamic water pressure wave excitation and fluid-solid coupling action device; and the monitoring device is used for monitoring the parameter state of the hydrodynamic pressure wave generation and water-rock interface propagation action process. According to the invention, the propagation environment of different hydrodynamic pressure waves in deep rocks can be simulated, and the energy transfer, action and attenuation characteristics of the hydrodynamic pressure waves under the action of fluid-solid coupling can be studied.