109results about How to "Reduce fatigue damage" patented technology

The invention provides an active load shedding optimization control method, system and device of a wind power plant and a storage medium, and belongs to the technical field of active power control of the wind power plant, and the method comprises the steps: constructing and training an SAC intelligent agent through an SAC algorithm; acquiring a wind power plant state quantity; inputting the state quantity of the wind power plant into the SAC intelligent agent to obtain a vector # imgabs0 # composed of active power initial reference values of all wind turbine generators; inputting the # imgabs 1 # into a constraint controller for secondary calculation to obtain a vector # imgabs 2 # composed of active power optimization reference values of the wind turbine generators; the wind power plant executes # imgabs3 #; and repeating the steps, and adjusting the active power of each wind turbine generator in real time. The model is high in generalization, stability, reliability and learning efficiency, real-time online calculation of the equivalent fatigue load can be achieved, reasonable distribution of the active power of the wind power plant can be achieved under the condition that the active power constraint of the wind power plant is met, the equivalent fatigue load of the whole wind power plant can be reduced, and the maintenance cost can be reduced.

The invention provides an intelligent active suspension system of a centrifugal machine, which belongs to the technical field of centrifugal machines and comprises an air spring mechanism, an actuating mechanism arranged beside the air spring mechanism, a control mechanism arranged beside the actuating mechanism, and an air supply mechanism arranged beside the spring mechanism. An anti-toppling structure is arranged inside or outside the air spring mechanism, a sensor body is arranged inside the air spring mechanism, the air spring mechanism is composed of an air spring body, a spring upper mounting plate and a spring lower mounting plate, and the spring upper mounting plate is fixed to the top of the air spring body. The advantages can be fully exerted, the problems existing in an existing centrifugal machine vibration isolation technology are effectively solved, the overall performance and reliability of the centrifugal machine are improved, and more stable, efficient and safe technical support is provided for the centrifugal separation process in industrial production; and the use height and the vibration isolation effect of the intelligent active suspension of the centrifugal machine can be adjusted according to use requirements.

The invention belongs to the technical field of robots, and discloses a decoupling control method and system for a two-degree-of-freedom vibration suppressor of a robot, and the method comprises the steps: analyzing the structural characteristics of a robot system, and designing a decoupling control strategy through a structural invariance principle; coupled vibration of force applied in the X direction in the Y direction and coupled vibration of force applied in the Y direction in the X direction are effectively eliminated. Compared with a traditional vibration control method, the multi-degree-of-freedom vibration suppression method has the advantages that the influence of a pose related mode and a coupling mode of the robot is fully considered, multi-degree-of-freedom vibration suppression can be efficiently realized in real time in a complex load and dynamic environment, and the adaptability and the control precision are relatively high. The technology has wide application prospects in the fields of robot precision machining, assembling, carrying and the like, and the stability, precision and working efficiency of a robot system can be remarkably improved.

The invention discloses a self-adaptive settlement photovoltaic support structure and method, and relates to the technical field of photovoltaic support. The self-adaptive settlement photovoltaic support structure comprises a stand column; the hoops are arranged in a split mode and connected through connecting pieces, and the split positions of the hoops extend outwards to form first mounting positions; the oblique beam is located on the upper side of the stand column, and the bottom side of the oblique beam extends outwards to form a second mounting position; the supporting part comprises a first supporting rod and a second supporting rod; the connecting assembly extends into the first mounting position and the second mounting position and is connected with the hoop or the oblique beam, and the first supporting rod and the second supporting rod are hinged to the connecting assembly. Passive or semi-active compensation is achieved when a stand column is subjected to differential settlement or relative displacement caused by temperature and wind load through hinge and deformation design of a hoop-supporting rod-connecting assembly, resistance control of a nested sliding piece and an adjustable embedded block and a force transmission path of a traction piece and a flexible cable.

The present invention belongs to the technical field of elevator products, and specifically discloses an escalator device for a shopping cart, including an escalator truss and an escalator track, wherein an upward / downward running device is respectively installed on the escalator truss, and the running device includes a driving device, and a lower horizontal conveying chain, an inclined conveying chain, and an upper horizontal conveying chain that are symmetrically arranged with the escalator truss as the center and driven by the driving device, and each chain of the conveying chain is connected with a push rod structure that forms a conflicting contact with the upright column at the rear side of the shopping cart and can drive the shopping cart to move when the elevator goes up or down, and the horizontal projection of the inclined conveying chain partially overlaps with the end positions of the upper horizontal conveying chain and the lower horizontal conveying chain adjacent thereto, and the bottoms of the lower horizontal conveying chain, the inclined conveying chain, and the upper horizontal conveying chain are all provided with a rolling support structure supported on the escalator truss. The escalator device can effectively reduce the pressure generated by the conveying chain at the bending part, ensure the stable performance during chain transmission, and effectively improve its service life. At the same time, it is easy to disassemble and assemble, which is convenient for the maintenance and maintenance of the escalator.

The utility model discloses a kind of damping device of unmanned plane rotating shaft, it is related to unmanned plane technical field, including: unmanned plane body and damping protection piece, unmanned plane body has rotor support, the end of rotor support is equipped with rotor drive structure, the end of rotor support is located below rotor drive structure and is equipped with through mounting hole;Damping protection piece is connected in the outside of rotor drive structure by mounting rod through mounting hole, the connecting place of mounting rod and mounting hole has elastic damping part, the outside of mounting rod is formed with damping and protection structure.The utility model sets up mounting hole by being arranged at the end of rotor support, connects damping protection piece in the outside of rotor drive structure, and sets up elastic damping part at the connecting place of mounting rod and mounting hole, can effectively buffer the vibration and impact of rotor rotating shaft, improve the flight stability and reliability of unmanned plane under complex environment.

The invention discloses a transmission conductor damping device and method, and the device comprises a fixed part which is disposed on a transmission conductor; the rotating part is arranged outside the fixed part in a sleeving manner and is rotationally connected with the fixed part; the driving part is rotationally arranged at the end, away from the power transmission line, of the fixing part; the limiting part is arranged on the driving part; the telescopic rotating part is arranged on the driving part, the telescopic rotating part is separated from limiting of the limiting part in the plumb bob direction under the action of wind power and rotates to droop, so that the telescopic rotating part abuts against the rotating part to drive the rotating part to rotate, and then the rotating part generates upward acting force to balance vibration force; and the telescopic rotating piece is separated from the rotating part. The telescopic rotating part drives the rotating part to rotate to generate upward acting force by utilizing vertically downward vibration force of the power transmission conductor, so that the vibration force of the conductor is balanced, and the vibration of the conductor in the vertical direction can be effectively inhibited.

The invention relates to the technical field of packers, in particular to an anti-falling packer for oil production engineering, which comprises a packer, a rubber sleeve is fixedly connected to the middle position of the packer, a plugging and limiting mechanism capable of providing protection for the rubber sleeve is arranged on the packer, and the plugging and limiting mechanism comprises a plurality of sliding chutes, a guide groove and a limiting seat. Sliding grooves are formed in the top end and the bottom end of the limiting seat, movable plates are slidably connected to the interiors of the sliding grooves, symmetrically-arranged guide strips are fixedly connected to the movable plates, first supports are fixedly connected to the positions, in the sliding grooves, of the movable plates, linkage blocks are rotatably connected to the first supports, and two symmetrically-arranged supports are fixedly connected to the top end and the bottom end of the limiting seat; the packer has the beneficial effects that excessive radial expansion of the rubber sleeve can be limited, plastic deformation or tearing of the rubber sleeve due to high pressure is prevented, meanwhile, pressure borne by the rubber sleeve is evenly dispersed, the overall structural stability is improved, and the sealing reliability and the structural stability of the packer are further improved.

The utility model discloses a stainless steel flange plate which comprises two stainless steel plates and an elastic buffer plate, the elastic buffer plate is fixedly adhered between the two stainless steel plates, storage cavities are arranged in the stainless steel plates, damping liquid is stored in the storage cavities, a plurality of blocking holes are arranged on the elastic buffer plate, and the blocking holes are communicated with the elastic buffer plate. And the retarding holes are hexagonal. The shock-absorbing bolt is good in shock-absorbing performance, reduces fatigue damage caused by shock, and can prevent the bolt from loosening caused by shock.

The invention relates to the technical field of bridge engineering, and discloses a novel damping vibration attenuation intelligent bridge support which comprises a bottom plate, a top plate is arranged at the top of the bottom plate, and the bottom plate is connected with the top plate through a connecting rod; the damping assembly is arranged between the bottom plate and the top plate and used for conducting damping operation when the damping assembly is stressed; the extrusion plate is fixed at the bottom of the top plate and is used for generating a force effect on the damping assembly; the limiting frame is fixed to the top of the bottom plate and used for limiting the force application direction of the extrusion plate; the sensing assemblies are arranged in the limiting frame in an annular array mode and used for monitoring the state of the equipment in a multi-azimuth mode when the equipment is stressed. External impact force is effectively absorbed and dissipated layer by layer, the top plate is buffered for the first time, and then the extrusion plate and the damping assembly are used for buffering for the second time and the third time, so that equipment still keeps stable when bearing large loads and vibration, the overall damping effect of the bridge support is improved, the service life of the structure is prolonged, and the service life of the bridge support is prolonged. And the possibility of fatigue damage is reduced.

The invention provides an efficient and energy-saving magnetic suspension fan and an operation method, and relates to the field of magnetic suspension fans, the efficient and energy-saving magnetic suspension fan comprises a double-end impeller driving part, a first-stage air inlet pipe orifice, a positioning mounting plate, a first-stage air outlet volute, a second-stage air inlet pipe orifice, a second-stage air outlet volute and a shunt connecting pipeline; the primary air inlet pipe orifice is in bolted connection with the left side of the double-end impeller driving part; the first-stage air outlet volute is in bolted connection with the left side of the double-end impeller driving part; the secondary air inlet pipe orifice is in bolted connection with the right side of the double-end impeller driving part; the second-stage air outlet volute is in bolted connection with the right side of the double-end impeller driving part; the positioning mounting plate is fixedly connected to the inner side of the primary air inlet pipe orifice; the flow dividing connecting pipeline is fixedly connected to the front side of the second-stage air outlet volute. The occurrence probability of fan surge faults caused by filter element blockage is reduced, and the problem that fan surge is triggered after the air inlet density and the effective air inlet amount are easily affected by filter element blockage is solved.

The utility model belongs to the technical field of unmanned plane, concretely relates to a retractable landing gear, including containing frame, landing support, limiting component and telescopic push rod. The utility model discloses the rotation direction adjustment is toward the advancing direction of unmanned plane when the landing support is stored in the internal storage cavity of containing frame, and when the landing support rotates to the vertical state, limiting support is realized by utilizing limiting component, so that in the ground taxiing stage of unmanned plane, the reverse torque borne by the landing support will not be transmitted to the telescopic push rod, effectively reduces the abrasion and fatigue damage of telescopic push rod, guarantees its stability in the long -term use process, and then prolongs the service life, and reduces maintenance cost and replacement frequency.

This utility model discloses an automatic centering ball-distributing oscillator structure, belonging to the field of bearing assembly. The automatic centering ball-distributing oscillator structure includes an upper connecting seat, with a lower connecting seat at the bottom of the upper connecting seat. The upper and lower connecting seats are interconnected by a centering structure. This utility model solves the problems of traditional oscillating ball-distributing mechanisms, where a single soft rubber body directly connects to the ball distributor for rotational oscillation, or directly connects to an object for rotational oscillation. These mechanisms are prone to breakage of the connecting rubber body, resulting in a short service life, frequent replacement of parts, low production efficiency, and increased operating costs. More critically, when using a single soft rubber body structure, the concentricity of the oscillating component is poor, preventing automatic centering. When used in bearing production equipment, the poor concentricity of the oscillating component frequently causes it to bump against the bearing edge. This utility model patent solves all these problems, resulting in significant economic benefits.

The invention discloses a multi-head embroidery machine and a dual-drive-shaft clutch mechanism thereof, and belongs to the technical field of embroidery, an axial clutch piece moves in the axial direction in the clutch process so as to realize transmission separation of one of a first drive shaft and a second drive shaft and transmission connection of the other one; the driving shaft positioning structure is used for achieving circumferential positioning of the first driving shaft and the second driving shaft after transmission separation with the axial clutch piece so as to limit rotation of the first driving shaft or the second driving shaft. Therefore, one of the first driving shaft and the second driving shaft which are separated from the axial clutch piece can be circumferentially positioned, so as to ensure that convex teeth and tooth grooves between the axial clutch piece and the first driving shaft and between the axial clutch piece and the second driving shaft are meshed again during next clutch.

The utility model relates to heating furnace technical field, concretely relates to a kind of conveying slide of copper ingot heating furnace, including cooling pipe, the cooling pipe is installed in the bottom of sleeve pipe in U shape, cooling pipe includes two straight parts and the bend part of connecting two straight parts, which are arranged in parallel along the axial direction of sleeve pipe, two The straight part is used for sliding bearing copper ingot, and the end of two straight part away from bend part has liquid inlet and liquid outlet respectively, to input coolant into cooling pipe;By setting the cooling pipe of U shape in sleeve pipe, so that copper ingot can slide along the two straight parts of cooling pipe under the action of pusher equipment, avoid the case that copper ingot and sleeve pipe long-term friction contact cause sleeve pipe abrasion occur, and further reduce the maintenance cost of heating furnace;By passing into coolant in cooling pipe, the temperature of cooling pipe in heating furnace can be reduced, to prevent cooling pipe from overheat fatigue due to temperature is too high, improve the service life of conveying slide.

The utility model provides a water softener. The water softener comprises a resin tank; the salt box is provided with a first containing cavity, a mounting opening and a first limiting part, the first containing cavity is used for containing saline water and the resin tank, the mounting opening is located in the top of the salt box and communicates with the first containing cavity, and the first limiting part is located on the bottom wall of the first containing cavity and matched with the lower portion of the resin tank; the supporting middle shell is arranged on the salt box, covers the mounting opening and is provided with a second limiting part, and the second limiting part is arranged around the upper part of the resin tank; and the flexible part is arranged between the outer wall of the upper part of the resin tank and the second limiting part. The first limiting part arranged on the bottom wall of the salt box is matched with the lower part of the resin tank to limit the horizontal displacement; and meanwhile, the second limiting part of the supporting middle shell is combined with the flexible component to conduct surrounding constraint on the upper portion of the resin tank, horizontal movement is limited, vertical vibration is buffered, stable installation of the resin tank is achieved, and the loosening problem caused by machining errors or deformation is avoided.

The utility model relates to the technical field of ultrasonic welding, in particular to a novel ultrasonic welding wire harness which comprises a wire harness body, a first connecting shell and a second connecting shell are arranged on the outer sides of the two ends of the wire harness body, and circular ring bodies are fixedly connected to the outer sides of the first connecting shell and the second connecting shell; the thermal expansion pipes are fixedly connected to the outer side of the wire harness body; the fixing sheet is arranged on the outer side of the joint of the two groups of adjacent wire harness bodies; the grooves are formed in one side of the fixing piece. According to the utility model, the defects in the prior art are overcome, the expansion pressure of the wire harness can be relieved, the elastic support is provided, the thermal expansion difference is absorbed, and the temperature resistance of the wire harness is improved by arranging the spiral wire harness body and the outer thermal expansion tube, so that the aging and degradation risks of the wire harness are reduced, and the service life of the wire harness is prolonged; through the design of the circular ring bodies on the outer sides of the first connecting shell and the second connecting shell, the fixing pieces and the grooves, the stability and reliability of wire harness connection can be improved, and the possibility of loosening or breaking of the wire harness connection position is reduced.

The utility model provides a large -diameter high pressure anti -explosion hose relates to the field of hose, the utility model discloses the built -in hose and a plurality of connecting blocks are included to the built -in hose, the utility model discloses the anti -explosion device is set up, and the use of large -diameter hose is used in building engineering to carry out high pressure cleaning operation when using, and the strength of built -in hose can be enhanced with a plurality of reinforcing ribs and reinforcing wire mesh, and the pressure -bearing capacity is improved, so as to reduce the possibility of blasting, when built -in hose breaks, it will enter between the built -in hose and the built -in hose, increase the flow area, carry out the first step pressure -relief explosion -proof, if pressure still continues to increase, the pressure -relief mechanism on the built -in hose will carry out secondary pressure -relief treatment, thereby effectively reduce the problem of pipe wall fatigue damage, improve cleaning efficiency, avoid the disorderly injection of high pressure water flow to the operator cause physical injury, or the situation of damaging peripheral facilities occurs, reduce the security risk when using.

The invention discloses a plutonium-containing feed liquid continuous evaporation concentration and oxalic acid destruction method and system.The method comprises the steps that a manganese solution and nitric acid are added into the plutonium-containing feed liquid for seasoning, and mixed feed liquid is obtained; continuously adding the mixed material liquid into an evaporator, heating and maintaining a preset temperature, so that the mixed material liquid is evaporated and concentrated in the evaporator, and oxalic acid destruction is completed; when the concentration of the feed liquid in the evaporator reaches the required multiple and the damage of oxalic acid meets the requirement, the concentrated feed liquid starts to be continuously discharged to a concentrated liquid receiving tank, continuous feeding and discharging are achieved, the discharging speed is equal to the feeding speed / the concentration multiple, the feeding speed of the mixed feed liquid and the discharging speed of the concentrated liquid are adjusted, and the feeding speed of the mixed feed liquid and the discharging speed of the concentrated liquid are adjusted; and the liquid level is constant at the preset liquid level value. The method has the advantages of large concentration multiple, high oxalic acid damage rate, large working flux, small equipment fatigue damage, stable equipment, continuous operation and simple operation, can meet the operation requirements of a post-treatment plant, greatly reduces the treatment amount of a plutonium purification cycle flow, and reduces the wastewater amount.

The invention discloses a fixing structure and a fixing method for caisson dragging equipment, and relates to the related field of caisson dragging equipment.The fixing structure comprises a fixing steel frame, a rear plate is fixed to the back of the fixing steel frame, a U-shaped attaching block is embedded into the inner side of the rear plate, and the outer side of a stabilization mechanism acts on the outer side of a cable; the stabilization mechanism synchronously acts along with the locking mechanism through meshing transmission of the fixed rack and the rotating gear, and a rotating roller of the stabilization mechanism elastically clamps the cable so as to buffer shaking force. According to the fixing structure for the caisson dragging equipment and the fixing method, the U-shaped attaching block is matched with the anti-skid pad and is combined with the locking bolt to be fixed to the rear plate, it is guaranteed that the fixing steel frame and the caisson foundation are stably connected, and displacement is avoided; the locking mechanism is in linkage with the stabilization mechanism, and the sliding block moves to drive the fixed rack, the rotating gear and other components to operate, so that the rotating roller is synchronously attached to the cable, cable shaking in the dragging process is reduced, and damage caused by stress point change is avoided.

The application discloses an intelligent environment-friendly inflatable quick switch cabinet and a control method thereof, which comprises a gas tank and a vacuum circuit breaker pole arranged in the gas tank, and an insulation pull rod is arranged on the vacuum circuit breaker pole; the opening and closing of an arc extinguishing chamber contact is controlled through the insulation pull rod, so that the circuit is realized; a modular electromagnetic repulsion driving unit is mounted on the outer wall of the gas tank, and the modular electromagnetic repulsion driving unit is connected with the insulation pull rod through an output shaft penetrating through the gas tank; a capacitor group is connected with a coil, which is used for generating electromagnetic repulsion to push a repulsion disc after being electrified; the repulsion disc is rigidly connected with the output shaft, and is used for moving forward and backward under the action of the electromagnetic repulsion; the electromagnetic repulsion driving unit is isolated from the inside of the gas tank through the modular external hanging type setting, the physical breakpoint of the shell mounting interface blocks the conduction of high-frequency strain waves to the inside of the gas tank, the micro cracks of the insulation supporting part caused by mechanical impact in the environment-friendly gas environment are avoided, and the long-term insulation safety under the low dielectric strength is ensured.

This invention discloses a GH4169 alloy extra-large turbine disk skin structure and its design method, belonging to the field of metal material forming. The skin structure, with its forging surface radially along the center hole of the rough-machined turbine disk delivery part, includes a skin center section, a second transition section, and a first transition section connected sequentially from the inside to the outside. Both the first and second transition sections are conical surfaces, with rounded corners at their intersection. The angle between the generatrix of the first transition section and the vertical direction is θ1, and the angle between the generatrix of the second transition section and the vertical direction is θ2, where θ1 > θ2. The two-stage transition section design of the forging surface of the skin structure effectively disperses stress concentration in the central area of ​​the die during forging, significantly reducing local stress at the contact point between the die punch and the blank. The stress value can be controlled below 320 MPa, avoiding punch deformation or damage; reducing fatigue damage to the die under high stress, extending die service life, and reducing production costs.

The utility model relates to the technical field of buoy anchor chain, especially for a kind of buoy anchor chain anti-winding mechanism, it include: installation main body, the installation main body includes main disc body and the cover plate being installed in the middle part of main disc body upper surface by bolt, the inside of main disc body is equipped with inner groove, carousel, the rotatable connection between carousel and cover plate, buffer assembly, the buffer assembly is set to the lower surface both sides of carousel, buffer assembly and anchor chain end portion are connected;Counterweight, the lower surface of main disc body is fixedly connected with counterweight, the lower end of counterweight and anchor chain main body are cooperatively inserted, the utility model solves the problem that anchor chain is wound buoy or knotted itself due to complex external force in background art, the rotatable connection between carousel and installation main body, constitutes the first barrier of anti-winding, avoid the torque sustained accumulation to cause anchor chain winding.

The invention provides an intelligent building integrated construction platform and a construction method thereof. The intelligent building integrated construction platform comprises a movable platform, an auxiliary guide rail and a lifting mechanism. The mobile platform comprises a bottom plate and a guardrail, and the guardrail is arranged on the bottom plate; the top of the bottom plate comprises two cargo carrying areas and a manned area, and the two cargo carrying areas are located on the left side and the right side of the manned area correspondingly. Each cargo carrying area comprises four vertically-telescopic top supporting structures and a first top plate, the four vertically-telescopic top supporting structures are arranged on the bottom plate at intervals, the first top plates are fixedly connected between the tops of the top supporting structures, and the first top plates are made of flexible materials; according to the intelligent building integrated construction platform, local point loads of goods can be converted into surface loads, one first top plate is transmitted to a plurality of first top plates through hinging, and overload of a single area is avoided.

This utility model discloses a plate heat exchanger with a reinforcement device, comprising: a heat exchange core formed by stacking multiple heat exchange plates sequentially, a reinforcement device disposed on the outside of the heat exchange core, the reinforcement device comprising oppositely arranged reinforcement components, each set of reinforcement components comprising a transverse reinforcement member and a longitudinal reinforcement member, the transverse reinforcement member being disposed along the width direction of the heat exchange core and abutting against the edge of the heat exchange plate, the longitudinal reinforcement member being disposed along the height direction of the heat exchange core and having both ends connected to the transverse reinforcement member, the transverse reinforcement member and the longitudinal reinforcement member forming a reinforcement frame to apply radial constraint force to the heat exchange core. By the transverse reinforcement member and the longitudinal reinforcement member of the reinforcement device enclosing and forming a reinforcement frame, the radial constraint force applied to the heat exchange core can effectively resist the impact of fluid pressure fluctuations on the heat exchange core, reduce the overall shaking or dispersion of the core formed by stacking multiple heat exchange plates due to uneven force, and significantly improve the overall structural stability of the heat exchange core.

The utility model relates to the technical field of air conditioner air pipe installation, and discloses a heat insulation support of an air conditioner air pipe, which comprises two pipe bodies, buffer mechanisms are arranged at the tops of the two pipe bodies, supporting mechanisms are arranged at the tops of the pipe bodies, and the buffer mechanisms comprise two supporting plates. The outer portions of the two supporting plates are fixedly connected to the adjacent sides of the outer portions of the two pipe bodies correspondingly, supporting blocks are fixedly connected to the bottoms of the two supporting plates, rotating columns are rotationally connected to the interiors of the supporting blocks, and rotating plates are fixedly connected to the outer portions of the rotating columns. By means of the telescopic reset capacity of the buffer spring, vibration energy is absorbed, fatigue damage of the structure is reduced, the service life of equipment is prolonged, the adaptability and reliability of the support are further enhanced through the design of the connecting plate and the ejector block, the pipe body can be supported, stable operation can be guaranteed, and meanwhile the safety capacity is improved.

The invention discloses a mechanical energy storage and release device and a thread trimming device. The mechanical energy storage and release device comprises a base; the movable part can move relative to the base; the energy storage part acts between the base and the movable part and is configured to store mechanical energy for driving the movable part to move; the state switching type locking mechanism has a first mechanical state and a second mechanical state; wherein in the first mechanical state, the state switching type locking mechanism introduces geometric constraint on a force application path of the energy storage component, so that the movable part resists the acting force of the energy storage component and is locked; the state switching type locking mechanism can be switched from the first mechanical state to the second mechanical state by applying an external triggering effect; and in the second mechanical state, the geometric constraint is relieved, and the energy storage part is released and drives the movable part to move.

The invention provides a pre-stress rolling mill and relates to the technical field of metallurgical equipment, the pre-stress rolling mill comprises a rack, a roller system, a rack pre-tightening mechanism and a hydraulic control system, the roller system is rotatably mounted on a housing through a bearing seat, and the rack pre-tightening mechanism comprises a pre-tightening hydraulic cylinder matched with the bearing seat in an aligned manner; the output end of the pre-tightening hydraulic cylinder vertically penetrates through the memorial archway and is in threaded connection with the bearing seat, and the pre-tightening hydraulic cylinder applies pre-tightening force in the vertical direction to the roller system. The hydraulic control system is provided with a hydraulic pipeline and a pressure adjusting switching valve, the hydraulic pipeline is connected with the pre-tightening hydraulic cylinder, the pressure adjusting switching valve is arranged on the hydraulic pipeline, the pressure adjusting switching valve is provided with a first working position and a second working position, when the pressure adjusting switching valve is located at the first working position, first pressure is provided for the pre-tightening hydraulic cylinder, and when the pressure adjusting switching valve is located at the second working position, second pressure is provided for the pre-tightening hydraulic cylinder. And providing second pressure for the pre-tightening hydraulic cylinder, wherein the second pressure is higher than the first pressure. The pre-stress rolling mill can keep proper pre-tightening force in a roll gap adjusting stage and a rolling stage.

This utility model relates to the field of photovoltaic equipment technology, specifically to a double-layer multi-cable flexible tracking bracket driven by a rotary reducer. It includes a cable assembly comprising two parallel load-bearing cables and a stabilizing cable located below the load-bearing cables. Two end columns are provided at both ends of the cable assembly. At least one central column is provided along the extension direction of the cable assembly and between the two end columns. End rotating beam assemblies and central rotating beam assemblies are respectively arranged above the end columns and central column to support and maintain the two load-bearing cables and the stabilizing cable in parallel space. Multiple stabilizing frames are spaced along the length of the cable assembly to reinforce the parallel state of the two load-bearing cables and the stabilizing cable. Rotary reducers are provided between the end columns and the end rotating beam assemblies, and between the central column and the central rotating beam assemblies. This utility model has a reasonable structural design and can effectively solve the problems of uneven cable tension and insufficient wind resistance stability.

This utility model relates to a wellhead double-seal packer, belonging to the technical field of oil extraction equipment. It includes a packing box, lower sealing packing, an elastic compensation ring, a lower packing gland, an upper sealing packing, and an upper packing gland. The elastic compensation ring comprises an upper compensation ring and a lower compensation ring with conical pressing surfaces. Multiple guide posts are evenly distributed at the bottom of the upper compensation ring, and compensation rubber sleeves are fitted onto the guide posts. The upper and lower connecting flange rings are connected by locking bolts. This utility model, with its double-seal packing and elastic compensation ring, automatically compensates for gaps after wear, improving sealing reliability and reducing leakage rate by over 90%. The compensation spring and rubber sleeve work together to adapt to vibration and pressure changes under different well conditions. The guide posts, stepped holes, and limiting nut structure of the elastic compensation ring provide radial constraint and axial compensation movement space for the compensation ring, ensuring that the compensation force always acts axially on the sealing packing, avoiding force dispersion or uneven loading due to vibration.