2543 results about "Mechanism (engineering)" patented technology

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

The invention provides an auxiliary device for steel pipe construction welding, and relates to the technical field of pipeline welding, and the auxiliary device comprises two arc-shaped bearing bodies, an auxiliary main frame, an aligning mechanism and a rotary driving system. The central angle of the arc-shaped bearing body is larger than 180 degrees, automatic centering of the steel pipes is achieved through the outer pressing supporting rod assembly and the inner positioning supporting rod assembly, and it is guaranteed that the two sections of steel pipes are concentric. And the welding head mounting seat is connected with the rotary driving piece through the arc-shaped movable clamping body to drive the welding head to continuously rotate around a welding seam, so that high-quality girth welding is completed. The device solves the problems of low centering precision and poor efficiency in traditional welding, has the advantages of high automation degree, high stability, convenience in assembly and disassembly and the like, and is suitable for quick welding of municipal steel pipe engineering.

The invention relates to the technical field of tensile tests, and discloses a building sealant stretching performance test device, which comprises a test box, a first clamp, a loading block, a linear driver and a driving mechanism, a door plate is mounted on the front of the test box; the first clamp is installed at the top in the test box, the loading block is arranged in the test box, located below the first clamp and driven by the linear driver to move up and down, a through loading channel is formed in the loading block, and a cylinder is arranged in the loading channel and driven by the driving mechanism to rotate; a through assembly channel is formed in the cylinder body, and a transversely-arranged guide rail body is installed in the assembly channel. According to the invention, by carrying out stretching, torsion, inclined stretching, tearing stretching, winding stretching and testing in a low-pressure environment on the sealant, the mechanical properties of the sealant under complex working conditions can be comprehensively evaluated, the testing precision and reliability are improved, the actual engineering requirements are met, and meanwhile, the testing safety and environmental protection property are ensured.

The invention provides an EMB sensorless clamping force estimation method based on multi-signal fusion and displacement compensation, and belongs to the technical field of vehicle braking, and the method comprises the steps: carrying out the modeling of an EMB system mechanical model; on the basis of the EMB system mechanical model established in the step S110, executing clamping force estimation; on the basis of the EMB system mechanical model established in the step S110, current-position information fusion is adopted to execute contact point detection; on the basis of the contact point detection result in the step S130, performing contact point detection position error compensation; on the basis of S140 position error compensation, a return stroke backlash compensation mechanism is introduced, the mechanical transmission gap error is further corrected, and the clamping force estimation precision is improved; and executing clamping force control scheme design based on the results of the steps. According to the method, a good clamping force estimation effect can be achieved, the system reliability is remarkably improved while the cost is reduced, and the method has good engineering application value.

The invention relates to the technical field of engineering construction, and particularly discloses a pavement flatness measuring device for engineering construction, which comprises an eight-wheel instrument for measuring the flatness of a pavement; the detection mechanism is installed in the eight-wheel instrument support, and the detection mechanism detects the friction coefficient of the road surface before the device runs; the road surface friction coefficient is detected in advance through the adjusting mechanism, the adjusting mechanism dynamically adjusts the position of a pressure sensor and the ground clearance of a detection wheel according to the friction coefficient, and a fixed motor is started to drive a rotating ring to rotate through a rotating roller and a synchronous belt to drive a second lead screw to rotate; the movement of the second moving member can drive the eight-wheel instrument supporting seat to move up and down, thereby adjusting the ground clearance of the detection wheel, effectively compensating the data deviation caused by the wear of the detection wheel, and improving the accuracy and stability of the measurement result.

The invention discloses a hot continuous rolling unit thickness detection and optimization method based on double closed-loop feedback control. In order to improve the problems of thickness control precision, response speed, a multi-rolling-mill cooperative operation mechanism and the like of an existing hot continuous rolling process, the comprehensive regulation and control method combining driving motor double-closed-loop speed regulation control, hydraulic cylinder pressing closed-loop control and thickness delay correction is provided. A multi-rolling-mill interconnection control system is constructed by coupling the rolling mills, the loops, the driving motors and the hydraulic cylinders, and high-precision dynamic adjustment of the tapping thickness is achieved. A double-closed-loop feedback control method is adopted, the rotating speed of a driving motor is adjusted by combining a rotating speed loop and a current loop, rolling force is dynamically adjusted through a hydraulic cylinder, and a thickness delay correction system is introduced to compensate thickness transmission errors between racks. According to the method, the thickness response time and overshoot of the hot rolling mill can be reduced, the thickness control precision and the system stability are improved, and the method has important guiding significance and engineering application value for high-precision hot continuous rolling production.

The invention discloses a permanent magnet synchronous motor joint simulation method, which comprises the following steps of: firstly, establishing a permanent magnet synchronous motor finite element model in Maxwell, and defining material nonlinear characteristics and motion boundary conditions; a motor drive control circuit is constructed in Simplorer, the finite element model is imported through a Twinbuild tool, and an electromagnetic-circuit joint simulation environment is established; creating a motor multi-body dynamic model and an external load model in Adams, and respectively exporting the motor multi-body dynamic model and the external load model into an FMU format and an Adamssub format; and finally, establishing an electromagnetic-circuit-mechanism joint simulation platform in the Simulink, and executing joint simulation. Compared with traditional joint simulation, according to the method, through electromagnetic-circuit-mechanism three-field real-time interaction, the motor can sense the load sudden change working condition, then the torque and current of the motor are rapidly adjusted through the PI controller, the problems that in engineering practice, the external load of the motor is not real, and the abnormal load is detected are solved, and the reliability of the motor is improved. And the crossing from an ideal load to an actual load is realized.

The invention discloses a cofferdam device for hydraulic engineering construction and an operation method thereof.The device comprises a cofferdam, buffering mechanisms arranged on the periphery of the exterior of the cofferdam, reinforcing mechanisms arranged on the periphery of the exterior of the cofferdam and driving control mechanisms arranged at the four corners of the cofferdam, and the cofferdam is composed of supporting columns and steel plates and forms a rectangular frame structure; the reinforcing mechanism is connected with a first fixing block and a second fixing block through a reinforcing rod to enhance the stability of the cofferdam, the driving control mechanism is composed of a forward and reverse motor, a sliding groove, a threaded rod and a sliding block and can automatically adjust the position of the buffering mechanism according to the change of the water level, and the buffering mechanism comprises a supporting rod, an arc-shaped first elastic plate, an arc-shaped second elastic plate and a first damper. Impact energy is absorbed through elastic deformation and damping force, and the cofferdam is protected against impact of water flow and floating objects. The position of the buffer mechanism can be automatically adjusted according to the water level condition, and it is ensured that the buffer mechanism is located at the optimal working position all the time so as to meet the buffer requirements under different water level conditions.

The invention relates to the technical field of mechanical engineering, in particular to a reciprocating type vertical lifting device.Two stand columns are fixedly connected to the top of a rail car, ejector rods are fixedly connected to the tops of the stand columns, a dynamic lifting mechanism is fixedly connected to the side faces of the stand columns, and a fixed side plate is arranged in the middle of the dynamic lifting mechanism; winding drums are arranged on the side faces of the two sides of the fixing side plate, a bearing mechanism is arranged in the middles of the two stand columns, a bearing table is arranged in the middle of the bearing mechanism, a balance mechanism is arranged at the bottom of the bearing mechanism, a balance base is arranged in the middle of the balance mechanism, and a balancing weight fixing base is arranged at the bottom of the balance base; a deceleration block is arranged on the side face of the balance mechanism, capsizing moment generated by goods deviation and position is counteracted, the deviation problem of the bearing mechanism is solved, friction between the bearing mechanism and the stand column guide rail is reduced, the stress of the root of the stand column is reduced, and the maintenance period is prolonged.

The invention discloses a self-adaptive parallel clamp and method suitable for a bush-disc test, and belongs to the technical field of mechanical engineering, the self-adaptive parallel clamp comprises a supporting mechanism, a parallelism adjusting mechanism is arranged in the supporting mechanism, the lower end of the supporting mechanism is connected with a clamping rod, the lower end of the clamping rod is provided with a sample clamping mechanism, and the sample clamping mechanism is provided with a clamping mechanism. And a movement mechanism is arranged at the lower end of the sample clamping mechanism. By adopting the self-adaptive parallel clamp suitable for the lining-disc test, the problem of parallelism error between the lining and the disc is solved, so that the horizontal load error and the friction force and friction coefficient measurement error caused by the error are reduced, and a more accurate surface-surface friction wear disc test is realized.

The utility model provides an adjusting device of a heavy load leveling mechanism of a track engineering vehicle, which comprises a jack, the bottom of the jack is rotatably connected with a rotating seat, the bottom of the rotating seat is fixedly provided with a bottom plate, the side surface of the bottom plate is fixedly provided with a side plate, the top of the side plate is fixedly provided with a threaded sleeve, and the threaded sleeve is fixedly provided with a threaded hole. The inner side face of the threaded sleeve is in threaded connection with a lead screw, a rotating handle is fixedly installed at the top of the lead screw, and a top plate is rotationally connected to the top of the rotating handle. The adjusting equipment of the heavy-load leveling mechanism of the rail engineering vehicle effectively solves the problems that due to the fact that the weight of leveling mechanism equipment and materials is large, the deflection change of a vehicle frame is large under the action of gravity, the positions of three installation bases and hinge pins are changed, the coaxiality of the hinge pins is out of tolerance, and the service life of the hinge pins is prolonged. And therefore, the leveling mechanism is blocked in rotation and even cannot rotate.

The invention discloses a compression type packer capable of being repeatedly set, and belongs to the technical field of oil production engineering equipment. A rubber barrel shaft is arranged on the outer circumference of a center pipe, a rubber barrel is arranged on the outer circumference of the rubber barrel shaft, a first sealing ring is arranged at one end of an upper pressing ring, an upper connector is arranged at the other end of the first sealing ring, a cylinder sleeve is arranged at the other end of the rubber barrel shaft, and an anti-resistance nail is arranged on the cylinder sleeve; and a plurality of setting valve core mechanisms and unsetting valve core mechanisms are arranged on the outer circumference of the second sealing ring on the outer circumference of the central pipe. The setting compression type packer is pressed to extrude the first medium container in the packer, hydraulic oil in the first medium container flows into the second medium container through the upper one-way constant-pressure valve element, the hydraulic oil in the second medium container is increased, the pressure is increased, and the internal hydraulic pressure is reduced by increasing the size of the second medium container; the second medium container extrudes the rubber barrel through the central pipe, the rubber barrel expands, the outer diameter is increased, a pipeline is packed, setting and unsetting of the compression type packer are achieved, and the actual production requirement is met.

The invention relates to an underground engineering surrounding rock instability process simulation test system under a deflection stress field. The system comprises a base, a guide rail, a front cover frame, a rear cover frame, a servo loader, a loading frame, a loading plate, a hydraulic motor, a gear and the like. A plurality of hydraulic loading devices are arranged on the inner surface of a concentric-square-shaped loading frame in the test system, active loading in different directions is provided for a test model, and a chamber surrounding rock stress field is simulated. And a plurality of groups of loading devices are arranged along the inner surface of the loading frame to form a circular loading mechanism. The test model is a circular sample, the test model is driven by a motor to deflect through three surrounding hoops on the surface, the front cover frame and the rear cover frame are connected through a penetrating pull rod and a hydraulic nut, and front and rear face passive constraint is provided for the test model. The simulation test system can realize an underground engineering surrounding rock instability whole-process similar simulation test under stress deflection environment conditions such as different stress field intensities, different included angles between a stress main shaft and a chamber orientation, stress field stress main shaft static and dynamic deflection and the like.

The invention discloses a reamer electromechanical driving mechanism and method capable of detecting the position state of a blade, and relates to the technical field of tools of petroleum drilling engineering, the reamer electromechanical driving mechanism comprises a power assembly, a lead screw assembly, an ejector rod, a locking assembly, a rotation detector and a displacement detector which are mounted in a drill collar; the power assembly is connected with the lead screw assembly, the lead screw assembly is connected with the ejector rod, the ejector rod is connected with the reamer blade, the power assembly rotates and drives the ejector rod to move up and down through the lead screw assembly, and the ejector rod moves up and down to drive the reamer blade to be unfolded or folded. The locking assembly is assembled on the ejector rod, and after the reamer blade is unfolded in place, mechanical self-locking is conducted on the ejector rod. The rotation detector is assembled beside the lead screw assembly to detect rotation of the lead screw assembly, and the displacement detector is assembled beside the ejector rod to detect up-and-down movement of the ejector rod. The opening and closing state of the cutter wing is measured and uploaded through the rotating detector and the displacement detector, the cutter wing is expanded in place, the underground condition can be judged easily, and controllable multiple reaming is achieved.

The invention belongs to the technical field of mechanical engineering, particularly relates to a self-adaptive grabbing mechanical arm, and provides the following scheme aiming at the problems that a clamping mechanism with a fixed shape is difficult to effectively fit an irregular outline of an object, so that the contact area of grabbing points is small, the stress is non-uniform, and the grabbing is unstable easily, the self-adaptive grabbing mechanical arm comprises a base; the rotating table is movably connected to the upper part of the base; the lifting hydraulic cylinder is fixedly connected to the upper end face of the rotating table; the main arm beam is fixedly connected to the driving end of the lifting hydraulic cylinder; and the sliding seat slides on the main arm beam. According to the self-adaptive grabbing mechanical arm, through the self-adaptive grabbing module, the self-adaptive grabbing mechanical arm can be bent in a self-adaptive mode to be attached to object contours of different shapes and sizes, a grabbed object is tightly wrapped in cooperation with the clamping air bag piece which is inflated and expanded, and flexible and stable grabbing of a target object with the complex outer surface is achieved; and the grabbing adaptability and convenience are remarkably improved.

The invention relates to the field of mechanical engineering, in particular to a multilevel screening speed reducer tooth matching method based on a standardized box body, which comprises the following steps of: acquiring basic parameters of an input gear speed reducer and parameters of each transmission stage, and acquiring derived parameter limit ranges of the basic parameters and the parameters; screening out a tooth matching scheme meeting user input constraint conditions, marking the tooth matching scheme as a candidate set # imgabs0 #, screening a serializable scheme based on general requirements of a serialized speed reducer on a final-stage gear pair, marking the serializable scheme as a candidate set # imgabs1 # on an existing standardized box body, designing a transmission system, and checking through tooth root bending fatigue strength to obtain a final-stage gear pair final-stage gear pair; and marking the tooth matching schemes meeting the strength requirement as a candidate set # imgabs2, performing serialized screening again based on the general requirement of the serialized speed reducer on the final-stage gear pair, and marking the schemes meeting the serialization as a final candidate set C1. According to the multi-layer screening mechanism, the tooth matching scheme meeting the strength requirement is rapidly matched for the serialized speed reducer.

The invention discloses an automatic system for brake spring force detection, which relates to the technical field of mechanical engineering and automatic control, and is characterized in that a multi-physics field coupling measurement module adopts a nested force sensor group (a strain gauge and piezoelectric quartz compound) and non-contact displacement measurement, and is combined with a thermal expansion compensation ring to correct temperature influence in real time; the environmental interference suppression module eliminates electromagnetic and thermal interference through an electromagnetic shielding cavity and a temperature control platform; the dynamic error compensation engine realizes drift prediction and physical field fusion by using six-dimensional attitude sensing and edge calculation (LSTM + GPR double-stage model); the self-calibration executing mechanism completes nanoscale positioning and micro-force control based on air flotation driving and the bionic clamping jaw. The method solves the problem of measurement misalignment caused by environmental interference, material thermal deformation and clamping errors in traditional detection, and is suitable for high-precision spring force detection under complex working conditions.

The invention discloses a capacitance method measuring device and method for the thickness of a lubricating oil film between mechanical friction pairs based on a dynamic correction model, and belongs to the technical field of electrical measurement. Wherein the point contact ball disc testing machine comprises a point contact friction pair formed by a conductive disc and a steel ball; the conductive disc is electrically isolated by arranging insulating rubber pads on the upper surface and the lower surface of the conductive disc, and the steel ball is electrically isolated by arranging an insulating ceramic ball bearing in a transmission mechanism where the servo motor is connected with the steel ball. The two independent servo motors respectively drive the steel ball and the conductive disc to rotate, so that test working conditions at different speeds can be realized. According to the invention, the capacitance distribution in the Hertz contact area can be effectively calculated, the problem of measurement errors caused by peripheral capacitance interference of the Hertz contact area in a traditional capacitance method is solved, and accurate measurement of the oil film thickness between common metal friction pairs in engineering is realized.

The invention discloses a highway bridge construction drilling platform which comprises a drilling platform body fixedly installed at the tail end of an engineering vehicle, an inverted-L-shaped frame, a lifting plate, a spiral drill rod and other key components, a knocking mechanism is arranged on the lifting plate, and the spiral drill rod is driven to do lifting reciprocating motion through transmission of a cylindrical sleeve, an inclined circular plate, an arc-shaped sliding block and a gear; and the platform is further provided with an adjusting mechanism, the drilling depth of the spiral drilling rod is accurately controlled through threaded connection matching of a threaded rod and a threaded sleeve block, and the drilling precision is enhanced. The dust falling mechanism atomizes and sprays a water source to a drilling hole through cooperation of a piston plate, a pull rod and a one-way valve, dust falling is achieved, a third gear at the bottom end of a fixing ring drives a bulldozing plate to conduct circular motion, crushed soil at the drilling hole is moved and transported, and drilling hole backfilling is prevented. And efficient, accurate and environment-friendly highway bridge construction drilling operation is achieved.

The invention belongs to the technical field of engineering hydraulic oil cylinders, and particularly relates to a hydraulic oil cylinder with a filtering mechanism for reducing pollutant accumulation. An air inlet pipe is directly connected with an external cold air source, cold air can be directly diffused in a device box and wraps a hydraulic oil cylinder body, and meanwhile a motor drives fan blades to rotate through a third rotating shaft; according to the oil cylinder cooling device, flowing of cold air in the device box body can be accelerated, the heat dissipation effect of the oil cylinder can be enhanced, heat accumulation caused by local retention of the cold air can be avoided, meanwhile, suspended dust generated by cleaning of the cleaning brush, small impurities which are not settled in the cold air and falling objects in the using process of the cleaning brush can be sucked, and the cleaning effect is improved. And the cleaning rod rotates under the rotation of the third rotating shaft, so that the impurities blocked by the second filter screen are cleaned, and the impurities enter a first collecting box through a connecting pipe.

The invention relates to the technical field of electric power engineering, in particular to a simulation method of a power station motor high-oil-pressure jacking hydraulic system, which comprises the following steps: building a high-oil-pressure jacking hydraulic simulation system which comprises a control module, a constant-pressure variable pump, a pressure release valve, a measuring element, an oil tank, an equivalent load, an equivalent hydraulic cylinder and a pressure release hole; the equivalent hydraulic cylinder is used for jacking up the equivalent load and simulating a real scene that the motor is jacked up by high-pressure oil; theoretical modeling is conducted on a frame and all parts of the high-oil-pressure jacking hydraulic simulation system; by establishing a linkage mechanism of the equivalent area, the pressure and the flow of the pressure relief hole, pressure fluctuation and compensation response during working condition conversion are accurately simulated; smooth transition between the static jacking state and the operation pressure maintaining state is achieved, and the stability and the self-adaptive capacity of the system under the variable rotating speed condition are effectively verified. Compared with traditional static simulation, the whole process of the hydraulic and mechanical coupling effect in actual operation is reflected more comprehensively.

The invention relates to an experimental device and method for testing the comprehensive mechanical property of a slender flexible cable, and belongs to the technical field of ocean engineering testing. The device comprises a main body frame, a tensile loading device, a bending load loading device and a torsional load loading device. The tensile loading device is not directly connected with the main body frame and is directly connected with the end part of the cable during an experiment. Through a modular integrated design, multi-axis coupling cooperative loading of stretching, bending and twisting is realized; a stretching actuator provides axial tension; the four-point bending actuator drives the slide rail and the roller to realize dynamic bending, and the bending radius is adjustable; the torsion actuator converts linear motion into torque through a gear-rack mechanism, and the supporting rollers eliminate axial interference. The device has the functions of pressure self-adaptive control and energy recovery. The device solves the problem that a traditional testing machine cannot simulate complex ocean working conditions, and is suitable for comprehensive mechanical property evaluation of flexible pipe cables such as submarine cables.

The utility model relates to the technical field of pipeline butt joint, in particular to a self-adaptive pipeline butt joint platform which comprises a butt joint base, and movable supports in sliding fit with the butt joint base are arranged at the two ends of the butt joint base. The butt joint base is provided with a synchronous driving assembly used for driving the two movable supports to move in the opposite direction and the relative direction. The movable support is provided with a clamping and supporting assembly used for fixedly clamping a pipeline, the movable support is provided with an auxiliary support matched with the clamping and supporting assembly, and the auxiliary support is provided with a lifting rope lifting assembly matched with the pipeline supporting assembly. By means of the unique technical scheme and mechanical mechanism design, the butt joint device has remarkable technical advantages and beneficial effects in the aspects of self-adaptability, butt joint efficiency, stability, intelligent control, cost effectiveness and the like, and powerful technical support is provided for efficient, accurate and safe butt joint in the field of pipeline engineering.

The invention relates to the technical field of damping energy dissipation and vibration attenuation, and provides a displacement amplification type variable stiffness self-resetting energy dissipation damper which comprises a composite energy dissipater, a first rotating rod and a second rotating rod are arranged at the front end and the rear end of the composite energy dissipater, and a liquid damper is fixedly connected to the side face of the composite energy dissipater. The first rotating rod and the second rotating rod are hinged to building structures on the two sides through connecting rods. A friction energy dissipation system and an SMA energy dissipation system are integrated in the composite energy dissipater, the liquid damper is welded to a cavity cam of the composite energy dissipater through a transmission rod, and the liquid damper is hinged and fixed to the second support. Through combination of multiple mechanisms of the liquid damper, the friction energy dissipation system, the SMA energy dissipation system and the second-stage displacement amplification system, effective vibration reduction and energy dissipation in a wide earthquake input range are achieved, and the energy dissipation performance and the self-resetting capacity are remarkably improved. The method is suitable for various structural engineering fields requiring high-efficiency seismic resistance, and has a good application prospect.

The utility model relates to the related technical field of plastic part processing, in particular to an engineering plastic part grabbing device which comprises a frame body, an adjusting mechanism is arranged on the top of the frame body, and a grabbing mechanism is arranged on one side of the adjusting mechanism. The grabbing mechanism comprises a driving air cylinder, a third driving motor, a first connecting disc, a connecting column, a connecting plate, a threaded column, a clamping arm, a second connecting disc, a movable block, a connecting block and a mounting piece, through the arrangement of the grabbing mechanism, the third driving motor drives the connecting column to rotate, the threaded column is made to move up and down, and then opening and closing of the clamping arm are controlled; the clamping range of the clamping arms can be flexibly adjusted according to plastic parts of different sizes, an adjusting mechanism is embedded in the inner wall of a first sliding groove through one end of a first sliding plate, one side of a second sliding plate is embedded in the inner wall of a second sliding groove, and by means of the design, sliding is more stable when certain pressure is borne; and the risk of grabbing failure or plastic part damage caused by shaking is reduced.

The invention relates to the technical field of hydraulic cylinder airtightness detection devices, and discloses an engineering vehicle hydraulic cylinder airtightness detection device which comprises a cross rod, a lower push rod is rotatably connected to the end of the cross rod, a driven cover is rotatably connected to the end, away from the cross rod, of the lower push rod, and a pull-down telescopic plate is fixedly connected to the bottom of the driven cover. Through the arrangement of the detection mechanism, when the hydraulic cylinder rotates, water is sprayed to the surface of the hydraulic cylinder through a spray head, so that a worker can conveniently observe whether the whole hydraulic cylinder leaks or not, if water bubbles appear, leakage occurs, and when the hydraulic cylinder rotates, a rotating disc can be driven to rotate on the inner wall of a circular groove, so that leakage is avoided; at the moment, the hydraulic cylinder can drive a conical sealing barrel to rotate on the inner wall of a sliding groove in the rotating process, meanwhile, a rubber sealing ring is driven to rotate, the hydraulic cylinder is effectively made to integrally rotate, water is sprayed to the surface of the hydraulic cylinder through a spray head, and therefore a worker can conveniently observe whether air leakage happens to the whole hydraulic cylinder or not.

The invention discloses frame steel cutting equipment for construction engineering construction, and relates to the technical field of cutting. The frame steel cutting equipment for construction engineering construction comprises a machine body, a machining mechanism and a notch formed in the side of the top of the machine body, a feeding mechanism is installed in the middle of the top of the machine body, the machining mechanism comprises an I-shaped base body and a rectangular inner cavity, and a hydraulic cylinder is fixedly installed on the side of the top of the I-shaped base body; a connecting flat plate is fixedly connected to the telescopic end of the hydraulic cylinder, a servo motor is fixedly installed in the middle of the bottom of the connecting flat plate, a strip-shaped hole is formed in the side, close to the servo motor, of the surface of the I-shaped base body, a cutting disc is fixedly installed at the output end of the servo motor, and a cutting guide assembly is installed in the middle of the bottom of the I-shaped base body. The purpose of stable cutting is achieved, frame steel vibration is reduced, protection is conducted, the situation that splashing hurts people is not prone to occurring, and cutting is convenient, accurate, safe and reliable.

The invention discloses a drill rod lowering control method, system and equipment of a rotary drilling rig and a medium, and belongs to the technical field of engineering machinery control. The drill rod lowering control method of the rotary drilling rig comprises the steps that if a drill rod lowering instruction is received, an electric main hoisting mechanism is controlled to lower a telescopic drill rod to a target drill hole; the current lowering depth of the telescopic drill rod is determined; the difference value between the hole depth of the target drill hole and the current lowering depth is set as the to-be-lowered depth; if the to-be-lowered depth is larger than the depth threshold value, the current lowering speed of the telescopic drill rod is set according to the current bearing weight, the power head height, the current lowering depth and the length of the sub drill rod; and if the to-be-lowered depth is smaller than or equal to the depth threshold value, a motor of the electric main hoisting mechanism is controlled to output reverse torque, and the motor of the electric main hoisting mechanism is controlled to stop rotating when a preset condition is met. The lowering speed of the telescopic drill rod can be reasonably controlled, and the service life of the rotary drilling rig is prolonged.

The invention discloses an amorphous alloy motor operation efficiency monitoring method and system based on artificial intelligence, and relates to the technical field of electrical engineering, the system is composed of a plurality of functional modules, and the system comprises a multi-dimensional data acquisition module for acquiring motor operation multi-field coupling parameters, environment condition data and motor operation multi-field coupling parameters; comprise electrical coupling parameters, thermal coupling parameters and mechanical coupling parameters; the edge calculation module is used for preprocessing motor operation multi-field coupling parameters and environment working condition data, introducing multi-field coupling features and extracting multi-dimensional features and multi-sensor time sequence features; and the cloud artificial intelligence analysis module constructs a dynamic mapping model based on historical motor operation data by adopting an improved LSTM and Attention mechanism and fusing a Transform architecture, inputs multi-dimensional features into the dynamic mapping model, outputs an energy efficiency level, and fuses multi-sensor time sequence features by using a graph neural network based on the energy efficiency level.