469 results about "Local pressure" patented technology

The invention discloses an intelligent pressure self-adaptive anti-bedsore nursing mattress system which comprises a flexible pressure sensing layer configured on the surface of a mattress and used for monitoring pressure distribution data of all parts of the body of a lying person in real time; the multi-air-chamber dynamic adjusting structure comprises a plurality of independent air chambers capable of being inflated and deflated, and the air chambers are distributed in the mattress and used for adjusting the supporting pressure of the corresponding areas according to instructions; the edge intelligent control module analyzes data based on a preset artificial intelligence algorithm to predict a bedsore occurrence risk area, and generates a control instruction according to a prediction result to drive the multi-air-chamber dynamic adjustment structure to adjust the pressure of each air chamber; and the environment regulation and control system comprises a temperature and humidity sensor and a microenvironment regulation device. Through real-time body pressure monitoring, AI risk prediction, dynamic pressure regulation and temperature and humidity coordinated regulation and control, local pressure can be remarkably reduced, a high-risk area can be early warned in advance, and a local microenvironment is improved, so that bedsores are effectively prevented, and nursing dependence is reduced.

The invention belongs to the technical field of bridge engineering, and aims to eliminate the problem of systematic underestimation of web bearing capacity under the condition of standard effective loading length. The invention provides a method for correcting a local pressure bearing capacity calculation formula of a steel beam web, which comprises the following steps of: identifying and determining a key parameter ratio and an engineering application range thereof by carrying out sensitivity parameter analysis on a bending reduction coefficient; on the basis of the reference engineering case, fixed values are taken from part of parameters, and other geometric quantities are inversely calculated; based on a preset variable sequence, finite element models are established in Abaqus in batches, and the ultimate bearing capacity and the flange longitudinal stress level of each model are extracted; the standard calculation value is corrected according to a finite element result, the corrected ultimate bearing capacity of the steel beam web is calculated, and a corrected bending reduction coefficient is obtained accordingly; and finally, fitting a corrected formula about the regularized slenderness ratio on the correction coefficient by taking the specification parameter as an independent variable to obtain an expression capable of directly replacing the original specification. The method can significantly improve the calculation precision.

The invention provides a curved surface detection method and device for an ergonomic chair back and a storage medium, and relates to the technical field of irregular surface detection. Comprising the following steps that S1, a plurality of detection units abutting against the curved surface of the chair back are provided, and each detection unit outputs pressure according to the height of the curved surface; s2, the multiple detection units are adjusted to be in a standard state, and in the standard state, each detection unit abuts against the curved surface of the standard chair back; s3, enabling the plurality of detection units to abut against the curved surface of the chair back to be detected so as to output and upload pressure; and S4, processing the uploaded pressure, and judging whether the curved surface of the to-be-detected chair back is qualified or not. According to the application, the plurality of local pressures of the curved surface of the chair back are detected in combination with the plurality of detection units, the curved surface bending shape of the chair back can be accurately detected and whether the curved surface of the chair back is qualified or not can be judged by analyzing and processing the plurality of local pressures, and the technical deficiency in the aspect at present is made up.

The invention discloses an intelligent layering and guiding device for highway tunnel fire smoke and a control method, and relates to the technical field of tunnel fire safety, a smoke flow Froude number is introduced as a direct control target, the parameter represents the ratio of smoke flow inertia force to buoyancy force, the numerical value directly determines the stability of a layering interface, and the layering interface can be directly controlled. The Froude number of each subarea of the tunnel is calculated in real time through a sensing network and is compared with a critical value calibrated through an experiment, when a real-time value is lower than the critical value, it is indicated that inertia force is relatively insufficient, the buoyancy effect is dominant, and instability and entrainment are likely to happen to an interface between a smoke layer and lower cold air, and then according to a control algorithm, the smoke layer and the lower cold air are controlled. The micro jet fan applies directional inertia force to a smoke layer by adjusting the angle and the speed, the intelligent induction smoke outlet optimizes local pressure difference and flow by adjusting the opening degree and assists in maintaining flowing, the smoke flowing state is actively locked in a stable layered flow interval, and mixing and sedimentation caused by flow state instability are prevented.

The invention discloses a pressing device for rubber product processing, and relates to the technical field of press machines for rubber processing, the pressing device comprises a press machine rack, a press roller driving mechanism, a pressure adjusting piston, a main press roller, an auxiliary press roller, a pressure feedback piece, a magnetic compensation piece and a rubber contour prediction piece, the press machine rack is internally provided with a pressing chamber; a main compression roller and an auxiliary compression roller are installed through a supporting seat and driven by a compression roller driving mechanism to rotate, a pressure adjusting piston adjusts the overall pressure of the main compression roller, a pressure feedback piece on the main compression roller can dynamically detect the pressing pressure and generate a magnetic field, and a magnetic compensation piece of the auxiliary compression roller is matched with the magnetic field to achieve local pressure compensation. Compared with an existing press machine, the press machine has the advantages that the press fit quality and stability of rubber products can be improved through pretreatment detection, gradient pressure compensation and multi-parameter cooperative control, and the production efficiency is improved. And the universality and adaptability of equipment are enhanced.

The invention belongs to the field of target drone fuel oil systems, and particularly relates to a self-adaptive supersonic speed target drone fuel oil system and a control method thereof. The system comprises a machine body oil tank, a first electromagnetic valve, an overflow valve, a pressurization oil tank, a fuel pump, an engine pump, a monitoring module and a control module. The body fuel tank comprises a main fuel tank and an auxiliary fuel tank which are arranged in a fuel tank in the middle of the target drone body and located in front of and behind the theoretical mass center of the target drone respectively. The pressurization oil tank is additionally arranged in the fuel oil cabin, fuel oil in the engine body oil tank enters the pressurization oil tank for pressure maintaining after being pressurized by the fuel oil pump, and then oil is supplied to the engine from the pressurization oil tank, so that stable oil supply to the engine is achieved by establishing a local pressure environment instead of a large pressure environment of the whole fuel oil cabin, and therefore when a fuel oil system works, the fuel oil can be stably supplied to the engine. The oil supply flow and pressure are controlled in a closed-loop mode in real time through the control system according to the engine state.

The invention provides a machining tool for fixing a rotor room, and relates to the technical field of machine tool machining, the machining tool comprises a base, a supporting part and clamping parts, the supporting part is used for supporting the bottom of the rotor room, the multiple clamping parts are arranged at equal intervals in the circumferential direction of a preset axis, and the axis of the rotor room coincides with the preset axis; the clamping part comprises a support and two clamping plates, the clamping plates are made of elastic materials, the support is provided with a moving part and a middle part which are connected with the clamping plates, the two clamping plates are arranged on the inner side and the outer side of the side wall of the rotor room respectively, and the moving part enables the two clamping plates to be close to each other in the radial direction of the rotor room and abut against the side wall of the rotor room. And meanwhile, the middle part enables the clamping plates to generate deformation attached to the side wall of the rotor room so as to fully clamp the side wall of the rotor room in the radial direction, the supporting area of the clamping plates to the rotor room is large, the multiple clamping parts enable supporting points to be reasonably distributed, the local bearing pressure of the rotor room is reduced, elastic deformation or plastic distortion of the rotor room is reduced, and therefore the machining precision is guaranteed.

The invention discloses a steel ladle slag line magnesia carbon brick masonry positioning device, and particularly relates to the technical field of steel ladle slag line masonry, the steel ladle slag line magnesia carbon brick masonry positioning device comprises a supporting ring located above a steel ladle, a positioning masonry assembly is arranged at the bottom of the supporting ring, and the positioning masonry assembly comprises a first gear ring arranged at the bottom of the supporting ring; and the bottom of the first gear ring is fixedly connected with a reinforcing ring. A first motor drives a gear ring to transmit and drives a reinforcing ring to rotate, all hinge blocks drive a masonry pressing plate to deflect synchronously in the same direction by means of sliding fit of an inclined guide groove and a sliding column, the masonry pressing plate forms circumferential synchronous pressurization on a brick ring through an abutting arc plate, it is ensured that the brick ring bears uniform pressure in the whole circumferential direction, and the construction efficiency is improved. The problem that local pressure is not uniform in manual masonry is solved, a core foundation is laid for forming a stable self-locking structure for the brick ring, meanwhile, mechanization of pressurization operation is achieved, manual pressurization is replaced, and the labor intensity of foundation pressurization is greatly reduced.

The invention discloses a partial pressure type extensible medical elastic cap, and relates to the technical field of neurosurgery postoperative nursing instruments, the partial pressure type extensible medical elastic cap comprises a partition debugging assembly, the outer surface of the partition debugging assembly is provided with a connecting assembly, and the partition debugging assembly comprises an elastic cap body. According to the partial pressure type extensible medical elastic cap, in order to improve the practicability of the elastic cap for head pressure bandaging after the craniocerebral operation, the main body width of the elastic cap body is increased to 10 mm, the gradient pressure weaving technology is adopted, the central area is formed by processing a high-elasticity weaving layer, the low-pressure area is formed by processing a low-elasticity weaving layer, the cutting feeling can be reduced, and the elastic cap is more practical. The elastic cap can be prevented from being in contact with auricles, opening and closing of the elastic cap can be achieved through the combination of the two corresponding neodymium magnets, the purpose of locally pressurizing the head of a patient can be achieved by pressurizing the air bag, and the elastic cap is convenient to use. The problem that a traditional medical elastic cap in the prior art is simple in structure and low in practicability is solved.

The hot-pressing die comprises a workbench, the top surface of the workbench is fixedly connected with a base table, a top frame is fixedly arranged over the workbench, and a pressing table is vertically arranged between the base table and the top frame in a sliding mode; in addition to the main hydraulic cylinder, pressure control of different areas is achieved through the multiple auxiliary pressing plates, in cooperation with the array pressure sensor in the lower die plate, in the whole hot pressing process, local pressure is finely adjusted, the overall surface pressure is uniform, and the hot pressing effect is improved; cooling is achieved through a first spraying head arranged in the lower die structure and a second spraying head arranged in the upper die structure, different from traditional flow channel type cooling, spraying impact is directly achieved on the back of the lower die plate and the back of the upper die plate, the extremely high local heat exchange coefficient is achieved through liquid flow impact, and the heat exchange efficiency is improved. And the jet liquid flow can carry away tiny bubbles generated by local high temperature, cooling failure caused by'air resistance 'is prevented, and the cooling efficiency is improved.

The invention relates to the technical field of intelligent manufacturing equipment, in particular to a mold cavity pressure homogenization precision control method and system based on a two-way closed loop, and the method comprises the following steps: based on an injection mold cavity, completing the sudden change recognition and compensation of pressure data, the dynamic switching of a master closed loop path and a slave closed loop path, and the discrimination of the synchronous adjustment state of a driver in sequence; and setting a gain adjustment action in stages, and implementing closed-loop correction according to a feedback trend to obtain a dynamic offset correction amount. According to the method, continuous correction of the pressure state is achieved by correlating multi-point pressure collection, judging the pressure sudden change position in the cavity in real time and dynamically compensating local abnormal data, the motion state of the propelling device is combined, pressure adjusting strategies are switched according to different process stages, a linkage gain adjusting and controlling mode is adopted, dynamic adjustment of pressure distribution keeps high collaboration, and the control effect is good. Periodic trend closed-loop correction is carried out on feedback signals in the driving response stage, and forming errors and product defects caused by abnormal local pressure are remarkably reduced.

The invention relates to the technical field of machining, and discloses a punching device for manufacturing an engine end cover, which comprises a workbench, a workpiece moving mechanism, a positioning and pressing mechanism, a punching mechanism and a cooling nozzle, the positioning and pressing mechanism comprises a base plate fixedly connected to the top end of the moving table, a pressing assembly used for pressing end cover raw materials, a transmission assembly used for positioning the end cover raw materials and a limiting top cover, the inner edge of the bottom end of the pressing assembly is in threaded connection with the outer edge of the top end of the base plate, and the inner edge of the bottom end of the pressing assembly is in threaded connection with the outer edge of the top end of the base plate through the transmission assembly; the end cover raw materials of different sizes and shapes are adapted, the universality and practicability of the device are improved, meanwhile, the clamping force of the movable rods which are distributed in the circumferential direction and move synchronously on the end cover raw materials is evenly distributed, damage to the end cover raw materials due to too large local pressure is avoided, and the surface quality of workpieces is protected; machining errors caused by vibration or displacement are effectively prevented, and the positioning precision can be improved.

The invention relates to the technical field of warp knitting machines, in particular to a yarn tension control system of a warp knitting machine, which comprises an adjusting mechanism, the adjusting mechanism comprises a motor, the output end of the motor is rotatably connected with a first gear, the end face of the first gear is rotatably engaged with a second gear, and the surfaces of the first gear and the second gear are provided with first connecting rods; second connecting rods are rotatably connected to the surfaces of the first connecting rods, third connecting rods are rotatably connected to the surfaces of the second connecting rods, grooves are formed in the side walls of the mounting seats, springs are arranged on the bottom surfaces of the grooves, sliding seats are arranged at the top ends of the springs, and first yarn guide rollers are rotatably mounted on the side walls of the sliding seats. According to the yarn guide roller, the contact area is increased, the pressure on the area is reduced, abrasion and deformation of the yarn caused by too large local pressure are effectively reduced, after the contact area is increased, friction force between the yarn and the first yarn guide roller is distributed more evenly, and the problem of hairiness yarn breakage caused by too large local friction is avoided.

The invention discloses a cleaning device for barnacles on the surface of a ship, and relates to the technical field of barnacle cleaning. The cleaning device for barnacles on the surface of the ship comprises a barnacle cleaning device body, and a polishing assembly, a shoveling assembly and a guiding-out assembly are installed on the outer side surface of a cleaning power assembly; according to the barnacle stripping device, the single-direction stress requirement is lowered through the effect of composite force through the inclined auxiliary knives on the outer sides of the perching knives, energy consumption and blade abrasion are reduced, the multiple perching knives reciprocate side by side, local pressure concentration is avoided through covering type cleaning, the arc-shaped bottom ends of the perching knives are attached to the curved surface of a ship body, and it is ensured that barnacles are thoroughly stripped; the barnacle cleaning device has the advantages that the barnacles can be cleaned by the barnacle cleaning device, accordingly, liquid can be blown, shoveled barnacles can be blown away from the bottom end of the barnacle cleaning device in real time, residues can be prevented from scattering back to a cleaning area due to movement or gravity of the barnacle cleaning device, cutting blades are matched with limiting ring grooves through limiting blocks, stable rotating tracks can be kept, the barnacle cleaning device automatically adapts to unevenness of the surfaces of hulls, and deflection or vibration caused by local jamming can be prevented.

The utility model relates to the technical field of anti-cavitation horizontal type thick slurry foam pumps, in particular to an anti-cavitation horizontal type thick slurry foam pump which comprises a base, an impeller cover is installed on the top of the base, a three-stage stepped impeller for preventing overlarge local pressure difference caused by instant pressurization of a single-stage impeller is installed in the impeller cover, and the three-stage stepped impeller is installed in the base. The top of the impeller cover is connected with a feeding pipe, and the feeding pipe is provided with a low-pressure-preventing mechanism which is used for preventing a low-pressure area from being generated due to the sudden change of the flow speed when thick slurry raw materials directly enter the impeller, the thick slurry foam is pre-accelerated and rectified through the spiral flow guide plate, and it is ensured that the pressure of a suction cavity is always higher than the saturated vapor pressure of liquid; and meanwhile, under the action of the three-stage stepped impeller, fluid is pressurized step by step, the situation that the local pressure difference is too large due to instant pressurization of a single-stage impeller is avoided, residual bubbles are guided to a low-pressure area through the final-stage pressure relief hole to be slowly released, bubble collapse impact is reduced, and therefore the cavitation prevention effect is achieved.

The utility model provides a substrate holding device and vapor phase growth equipment. The substrate holding device comprises a bearing base. The upper surface of the bearing base is provided with a groove for bearing a substrate, the top edge part of the bearing base is a peripheral protruding part, and an arc-shaped surface of which the curvature radius does not exceed 20mm is arranged between the side wall and the bottom surface of the peripheral protruding part; the bearing base is internally provided with an air channel, a first end opening of the air channel is located in the bottom face of the groove, a second end opening of the air channel is led out from the arc-shaped face, and due to the fact that the top edge of the bearing base is the peripheral protruding part, when air flows through a narrow area between the peripheral protruding part and the inner wall of the cavity, the flow speed is increased, and local pressure is increased; when the substrate is bent, a low-pressure area is generated near the arc-shaped surface, and then a remarkable negative pressure effect is generated in the air channel, so that the substrate is adsorbed on the bottom surface of the groove, the contact force between the substrate and the bottom surface of the groove is increased, and the substrate is prevented from warping and separating from the bottom surface of the groove.

The invention relates to the technical field of curved surface forming of fiber composite materials, in particular to a fiber composite material curved surface multi-point flexible gas-assisted hot pressing pressure control method and system.The method comprises the steps that the fiber direction is obtained by obtaining a design mold, and a deformation mismatching area is determined according to the fiber direction and the obtained airbag deformation direction; according to the method, a deformation mismatch area is obtained, a mismatch dynamic control network is constructed to carry out adaptive adjustment on the deformation mismatch area, local pressure compensation is carried out according to obtained adaptive adjustment feedback, and finally, the mismatch dynamic network is controlled by collecting a mold gap and a gap fitting standard. The problem of deformation mismatch caused by elasticity modulus difference in the primary and secondary directions of the fibers is effectively solved, and the direction and position accuracy of the fibers in the forming process is ensured through dynamic adaptive adjustment of a deformation mismatch area, so that the structural integrity and the mechanical property of a formed object are improved, the pressure can be more accurately controlled, and the production efficiency is improved. The requirements of complex mold curved surfaces and fiber layout are met, and the forming precision is improved.

The utility model discloses a hollow composite insulator convenient to install, and relates to the field of hollow composite insulator devices, the hollow composite insulator comprises a hollow composite insulator main body and a support frame, and the hollow composite insulator main body is fixedly installed at the top of the support frame through an installation assembly. According to the hollow composite insulator, the supporting plate is installed at the bottom of the hollow composite insulator body, the contact area between the bottom of the hollow composite insulator body and the supporting frame can be increased through the supporting plate, the force distribution can be more uniform by increasing the contact area between the hollow composite insulator body and the supporting frame, and the connection stability is enhanced; when the core rod is subjected to external force, the force can be better transmitted to the supporting frame through the supporting plate, the situation that local pressure of the hollow composite insulator body is too large can be reduced through the supporting plate, and deformation or damage caused by local stress concentration of the hollow composite insulator body and the supporting frame is avoided. And the strength of the hollow composite insulator after integral installation is improved.

This invention provides a multi-angle implantation structure for keyboard key brackets, belonging to the field of keyboard manufacturing technology. It includes a feeding component, a transferring component, and an implantation component. It also relates to a method of using the multi-angle implantation structure, comprising the following steps: Step 1: Equipment debugging and parameter preset; Step 2: Keyboard positioning and fixing; Step 3: Automatic feeding of the key bracket; Step 4: Precise transfer of the key bracket; Step 5: Precise multi-angle implantation of the key bracket; Step 6: Real-time monitoring and anomaly handling; Step 7: Work completion and equipment maintenance. The beneficial effects of this invention are: multi-angle implantation of the key bracket is achieved through the implantation module, adapting to the production needs of keyboards of different models and key layouts, improving the versatility of the equipment, buffering the impact force during implantation, increasing the contact area with the key bracket, avoiding excessive local pressure leading to bracket deformation, adapting to different specifications of key brackets, and improving production efficiency.

The application relates to the technical field of axial flow pumps, in particular to an inclined axial flow pump with a composite lubrication anti-deviation wear structure, which comprises a pump shaft and a pump body assembly, the pump shaft penetrates through the pump body assembly, a guide vane pipe is arranged in the pump body assembly, a water guide bearing is rotatably arranged in the guide vane pipe, a harmonic reducer is arranged on the water guide bearing and is in transmission connection with the pump shaft through the harmonic reducer, an upper positioning ring is arranged in the guide vane pipe, and the upper positioning ring and the water guide bearing are provided with a power circulation mechanism which is matched with each other. The harmonic reducer is used for transmission and speed reduction, when the pump shaft is driven to rotate, the water guide bearing can be synchronously driven to rotate, the position of a bearing bush in the water guide bearing is periodically adjusted, local pressure concentration of the bearing bush is avoided, and wear aggravation is avoided; meanwhile, when the water guide bearing rotates, the power circulation mechanism can be synchronously driven to move, and lubricating and cooling medium is pushed to circularly flow in a lubricating and cooling flow channel of the water guide bearing.

The application discloses a template support structure of a seawall frame dike and a construction method thereof. The template support structure comprises a bottom foundation assembly, a middle support assembly and a top supporting assembly. The bottom foundation assembly comprises a stress dispersion pad layer arranged on the upper surface of a reinforced concrete bottom plate. The middle support assembly comprises support vertical poles. The bottom of each support vertical pole is supported on the stress dispersion pad layer. The stress dispersion area of the stress dispersion pad layer is larger than the pressure bearing area of the bottom of the support vertical pole. The top supporting assembly is arranged on the top of the support vertical pole. The construction method of the application comprises the steps of bottom plate construction, stress dispersion pad layer arrangement, middle support assembly erection, top supporting assembly arrangement, concrete pouring and template support structure dismantling. The application increases the contact area of the bottom of the vertical pole and the reinforced concrete bottom plate, reduces the concentrated stress of the bottom of the vertical pole, avoids the local pressure damage of the bottom plate, and improves the overall stability of the support system.

This invention discloses a loading device for synthetic sintered corundum. The loading device is used to transport bagged sintered corundum, and the feeding end of the loading device is aligned with the truck bed. The loading device includes an inclined conveyor, comprising a base belt and drive rollers on both sides of the base belt's transport surface. When the bag enters the baffle with the base belt, the suction unit uses negative pressure to suck up dust on the bag. When the bag moves to the convex plate and contacts the top bar, the top bar exerts local pressure on the bottom of the bag, causing the bag to open at the break point. The sintered corundum particles inside the bag fall out from the break, physically separating the broken bag from the material. This allows operators to accurately determine whether the bag is broken based on the falling sintered corundum particles, preventing broken bags from entering the truck bed.

The invention discloses a CNC machining clamping fixture for an LED box, and belongs to the technical field of clamping tools, the CNC machining clamping fixture comprises a first machining plate used for clamping the back face of a plate and a second machining plate used for clamping the front face of the plate, a plurality of first clamping pieces used for clamping the plate are installed on the top face of the first machining plate, and a plurality of second clamping pieces used for clamping the plate are installed on the top face of the second machining plate. A plurality of second clamping pieces used for clamping the plate and a plurality of first supporting pieces used for supporting the plate are installed on the top face of the second machining plate, each first supporting piece comprises a plurality of floating roof air cylinders, and the top ends of the floating roof air cylinders abut against the front face of the plate. According to the device, it can be ensured that the plates are always kept stable in the machining or storage process, and damage or deformation of the plates caused by too large local pressure is avoided.

The utility model relates to the technical field of paper diapers, in particular to a non-tightening-feeling paper diaper which comprises a diaper body, two leg surrounding openings are formed at one end of the diaper body, a water absorption bottom crotch is arranged between the two leg surrounding openings, an elastic waistline is arranged at the other end of the diaper body, pressure dividing pieces are arranged on the leg surrounding openings, one end of each pressure dividing piece penetrates into the elastic waistline, and the other end of each pressure dividing piece penetrates into the elastic waistline. The elastic waistline comprises a skin-friendly surface layer and a plurality of elastic ropes, the elastic ropes are located in the skin-friendly surface layer, and a first doubling thread group and a second doubling thread group are arranged in the skin-friendly surface layer in a manner of penetrating through the elastic ropes. The partial pressing piece is connected with the elastic rope through the first doubling thread set and the second doubling thread set, the partial pressing piece is fixed to the legs of a baby through the leg bandage at the other end of the partial pressing piece, the springback force of the elastic waistline is partial pressing towards the leg positions along the partial pressing piece, local pressure is reduced, and the tightening feeling is not prone to being generated.

The utility model relates to the technical field of welding clamps, in particular to a battery clamp which comprises a limiting shell and an elastic connecting piece, the limiting shell is connected through the elastic connecting piece, clamping force is provided for the limiting shell, due to the buffering characteristic of the elastic connecting piece, even clamping force is provided for a battery shell in a flexible clamping mode, and therefore the clamping force of the battery shell is improved. The clamping force is provided by the elastic connecting piece, deformation of the shell caused by overlarge local pressure is avoided, the problems that in a traditional rigid clamping mode, the clamping force is not uniform, and the shell is prone to deformation are effectively solved, the clamping force is provided by the elastic connecting piece, and a device for providing the clamping force does not need to be additionally arranged, so that the clamp is simpler in structure, fewer in parts, easier to maintain, smaller in size and more flexible to use.

The invention relates to the technical field of engine crankshafts, in particular to a split type two-stroke engine crankshaft which comprises a cylindrical front end shaft with one axial end being a free end and the other end extending in the axial direction; the second crank is of a disc-shaped structure, the end face of one side of the second crank is coaxially and fixedly connected with the end face of the extending end of the front end shaft, and the diameter of the second connecting rod journal is smaller than that of the second crank; and the vent holes adopt a double-hole design of which the aperture is 10mm and the vent holes are symmetrically distributed at 180 degrees in the circumferential direction, so that the crank case is effectively communicated with the inner spaces on the axial front and rear sides of the connecting rod journal. When the engine runs, the crankshaft rotates at a high speed, and the vent hole synchronously rotates along with the crankshaft to form a'dynamic flow guide channel ': when the piston moves downwards to increase the pressure of the cavity on one side, high-pressure gas can quickly flow to the low-pressure cavity through the vent hole, so that excessive accumulation of local pressure is avoided; when the piston moves upwards to form negative pressure, the low-pressure cavity can supplement gas from the high-pressure cavity through the air hole, and pressure dynamic balance under all working conditions is achieved.

This invention relates to the field of pickled mustard tuber production, and more particularly to a pickled mustard tuber head trimming machine with an adaptive contour-following leaf removal device. The technical problem to be solved is that existing equipment has limited functionality, typically only capable of performing one of the two operations: leaf removal or vegetable removal, and lacks integrated cleaning and pre-treatment functions, resulting in significant manual intervention in subsequent processes. Technical solution: A pickled mustard tuber head trimming machine with an adaptive contour-following leaf removal device includes a mounting frame and a discharge plate; the mounting frame is equipped with an inclined discharge plate for discharging material; this invention achieves adaptive contour-following wrapping, reducing damage: by setting lower and upper air bladders and using pneumatic control for their lateral expansion, it can adaptively contour-follow and fix the pickled mustard tuber head according to its actual shape. Compared to rigid clamps, the flexible air bladder structure avoids crushing or breakage caused by excessive local pressure, and is particularly suitable for irregularly shaped pickled mustard tuber heads, effectively reducing mechanical damage during processing.

The utility model discloses an aircraft part polishing tool, which relates to the technical field of aircraft part processing, and comprises an operation table, the upper side of the operation table is fixedly connected with a mounting cover, the exterior of the mounting cover is fixedly connected with a first motor, one side of the first motor is fixedly connected with a rotating column, and the rotating column is rotatably connected to the interior of the mounting cover; a fixing cylinder is fixedly connected to the tail end of the rotating column, multiple sets of external expansion mechanisms which are arranged at equal intervals and installed in a staggered mode are installed on the inner side of the fixing cylinder, an adjusting and positioning mechanism is installed in the fixing cylinder, and an electric push rod is fixedly connected to the upper side of the installation cover; the device is driven by a single motor to synchronously control all the external expansion plates to achieve radial adjustment and self-locking clamping, pipeline parts of different sizes can be rapidly adapted and clamped, and it can be guaranteed that clamping force is evenly distributed; and deformation of the thin-wall pipeline part caused by non-uniform local pressure in the polishing process is effectively prevented.

The utility model discloses a high-pressure sealing structure of high-temperature sterilization equipment for edible mushroom production in the field of high-pressure sealing, which comprises a sealing component, the sealing component comprises a sealing cover, the upper surface of the sealing cover is movably connected with a fixing bolt, and the outer surface of the sealing cover is fixedly connected with a first sealing ring; a second sealing ring is fixedly connected to the outer surface of the sealing cover, a spring column in the anti-leakage assembly is arranged, and when the second sealing ring extrudes the surface of a connecting pad, the spring column can eject a connecting plate upwards, so that the spring column adapts to size changes through elastic deformation of the spring column, and pressure on a sealing component is always kept; the sealing surfaces are tightly attached, so that the good sealing effect is maintained, meanwhile, pressure distribution can be automatically adjusted according to the actual conditions of the sealing surfaces, the problem that sealing is not tight due to the fact that local pressure is too high or too low is solved, and sealing reliability is improved.

The invention relates to the technical field of thermal management, in particular to a novel vortex electronic water pump for a thermal management system of an electric vehicle, which comprises a water pump main body and a buffer cylinder, a floating vortex cavity for converting shaking into vortex is arranged on the inner side surface of the buffer cylinder, and a piston for storing water and outputting pressure is arranged on the inner side surface of the buffer cylinder; the bottom surface of the pressure storage piston is provided with a flow stabilizing funnel which collects cooling liquid and does not affect water pressing of the piston, the bottom surface of the buffer cylinder is provided with a centrifugal liquid locking valve which is controlled to be opened and closed according to start and stop of the pump, and the bottom surface of the buffer cylinder is provided with a damping seat which reduces influence of self-vibration of the pump on a pipeline. And shaking kinetic energy is converted into local pressure stabilizing potential energy through liquid inertia and centrifugal force of vortex, air suction caused by instantaneous liquid level falling is eliminated, and the problem that in the using process, short-time air suction and cavitation of the circulating pump cause sudden reduction of condensation efficiency is solved.