630results about How to "Reduce control difficulty" patented technology

The present invention discloses a glass substrate grinding device, which relates to the technical field of glass substrate processing, and comprises a grinding shell and an upper water knife, wherein a through groove suitable for allowing a single side of a glass substrate to pass continuously is formed on the grinding shell along a first horizontal direction; a grinding wheel is arranged inside the grinding shell; a negative pressure interface is arranged on one side of the grinding shell, and the negative pressure interface is used to connect an external device and make the interior of the grinding shell in a negative pressure state; an upper air knife is arranged on the grinding shell, and a first air outlet is arranged on the side of the upper air knife facing inward along a second horizontal direction, and the first air outlet is used to blow air to the single-sided upper surface of the glass substrate; a lower air knife is arranged on the grinding shell, and a second air outlet is arranged on the side of the lower air knife facing inward along the second horizontal direction, and the second air outlet is used to blow air to the single-sided lower surface of the glass substrate; the lower air knife and the upper air knife are arranged symmetrically at the two ends of the through groove in a vertical direction; and the upper water knife is used to spray water to the upper surface of the grinding area of ​​the glass substrate. The present invention can effectively block the grinding water inside the grinding shell.

The invention discloses an adjusting system for a gas helium cold screen in a vacuum tank and an application method, and particularly relates to the technical field of mechanical engineering, the adjusting system for the gas helium cold screen in the vacuum tank comprises an outer cold screen body and an inner cold screen body, and the outer cold screen body is formed by combining three outer cold screen single bodies. Through cooperation of the multiple positioning mechanisms and the multiple inner supporting mechanisms, the inner cold screen body can be limited and fixed in multiple directions, the positioning mechanisms and the inner supporting mechanisms can be rapidly separated from the inner cold screen body subsequently, the mounting and dismounting difficulty and the workload are reduced, the assembling efficiency is improved, and the assembling cost is reduced. Meanwhile, a trigger piece of the control mechanism can complete supporting and limiting of the inner cooling screen body, the trigger piece can conduct active switching control over the conveying state of the control mechanism, locking of the positioning mechanism and opening control over the inner supporting mechanism are completed, the control difficulty is reduced, meanwhile, multi-directional debugging and installation of the inner cooling screen body are completed through the control mechanism, and the debugging efficiency is improved. And the mounting precision is improved.

The invention relates to a hydraulic system of a steering mechanism, the steering mechanism and engineering machinery, the hydraulic system of the steering mechanism is used for controlling forward running steering and reverse running steering of a vehicle, and the hydraulic system of the steering mechanism comprises a hydraulic pump (1); the unloading valve group (2) is arranged on an oil supply path of the hydraulic pump (1), and the unloading valve group (2) is configured to release the pressure of the hydraulic oil; the proportional control valve group (3) is arranged on a working oil way of the unloading valve group (2), and the proportional control valve group (3) is configured to control the steering direction and the steering angle of the first steering axle (10) and the steering angle of the second steering axle (20); the flow amplification valve group (4) is arranged between the proportional control valve group (3) and the steering oil cylinder (5), the flow amplification valve group (4) and the steering oil cylinder (5) are both located on a working oil way of the proportional control valve group (3), and the flow amplification valve group (4) is configured to amplify the flow of hydraulic oil entering the steering oil cylinder (5).

The invention provides a preparation device and process of electronic-grade silane. According to the preparation device, a first disproportionation reaction is carried out on the basis of the first reactor, dichlorosilane is rectified and separated to serve as a raw material for a second disproportionation reaction, silane can be obtained on the basis of cheap trichlorosilane and a catalytic reagent, and electronic-grade silane can be obtained on the basis of traditional purification after rectification; based on heat exchange between tower top materials of the rectifying tower I and a tower kettle reboiler of the rectifying tower II, differential pressure thermal coupling integration is realized, condensing equipment and operation steps can be omitted, energy consumption is reduced, and the defects of high preparation cost and high energy consumption of a silane preparation device in the prior art are overcome.

The invention provides a high-toughness and high-temperature-resistant Al-Si-Cu-Mg series aluminum alloy as well as a preparation method and application thereof. The Al-Si-Cu-Mg series aluminum alloy is prepared from the following components in parts by weight: 6.5 to 9 parts of Si, less than or equal to 0.2 part of Fe, 1.5 to 3.5 parts of Cu, 0.1 to 0.5 part of Mn, 0.2 to 0.8 part of Mg, 0.05 to 0.2 part of Ti, 0 to 0.1 part of Sr, 0 to 0.2 part of Re, 100 parts in total, and the balance of Al. The preparation method comprises the following steps: (1) burdening according to the ratio, preheating and drying the raw materials, sequentially adding the raw materials into smelting equipment, and heating and melting to obtain an alloy melt; (2) refining and modifying the alloy melt; (3) the refined alloy melt is subjected to forming machining, and an aluminum alloy blank product is obtained; and (4) the aluminum alloy blank product is subjected to T6 heat treatment, and the aluminum alloy is obtained. The aluminum alloy material with high mechanical property and high-temperature-resistant stability can be obtained by only adopting an Al-Si-Cu-Mg'vegetarizing 'formula without adding various trace elements and without redesigning and adjusting a production process, and the aluminum alloy material is simple in process, low in cost and particularly suitable for large-scale industrial production.

The invention discloses a multi-parameter coordinated temperature control method and related equipment. The method comprises the following steps: acquiring historical parameter information of a drying system; analyzing the historical parameter information to obtain an influence rule among multiple parameters of the drying system; real-time operation parameters of the drying system are obtained, and a multi-parameter coordination control strategy of the drying system is determined based on the real-time operation parameters and the influence rule; and controlling the drying system based on the multi-parameter coordination control strategy so as to control the temperature of the drying system. The problems that an existing material drying device is basically in a pure manual control state, the complexity of the drying process is increased due to manual control, the control difficulty is high, and the drying efficiency is low are solved.

The invention relates to the technical field of electric vehicle heat management, in particular to an indirect heat pump type heat management system. Comprising an electric drive cooling liquid loop, a battery cooling liquid loop, a heating cooling liquid loop and a refrigerant loop. The heating cooling liquid loop comprises a first heating loop and a second heating loop; the first heating loop is connected in series with a warm air core body; the second heating loop exchanges heat with the battery cooling liquid loop through the battery heating heat exchanger; the refrigerant loop comprises a first refrigerating loop, a second refrigerating loop and a third refrigerating loop; the first refrigerating loop exchanges heat with the heating coolant loop through the water-cooled condenser; the second refrigerating loop exchanges heat with the battery cooling liquid loop through the battery cooling heat exchanger; an evaporator used for cooling the passenger compartment is connected to the third refrigeration loop in series. And the battery cooling liquid loop and the electric drive cooling liquid loop are mutually coupled and communicated. The indirect heat pump type heat management system can well meet the heating requirements of a battery pack and a passenger compartment.

The invention discloses a frequency control method and system for an offshore wind power flexible low-frequency sending-out system, and relates to the technical field of power system frequency supporting. The working condition parameters are subjected to power frequency coordinated optimization control through a power frequency side control model to obtain a power frequency control instruction and a target system frequency, and the target system frequency and the working condition parameters are subjected to low-frequency coordinated optimization control through a low-frequency side control model to obtain a low-frequency control instruction; and performing frequency support optimization control on the frequency of the wind turbine generator through the active frequency support control model to obtain an additional power instruction, and performing power control on the offshore wind power flexible low-frequency sending-out system by adopting a power frequency control instruction, a low-frequency control instruction and the additional power instruction. The technical problems that the actual frequency deviates from a rated working point and the system control difficulty is increased due to the fact that the frequency control of the system is realized through the flexible low-frequency grid-connected frequency coordination control system by offshore wind power in the prior art are solved.

The invention relates to the technical field of comprehensive treatment of industrial solid wastes, and particularly discloses a comprehensive utilization method of secondary aluminum ash, which specifically comprises the following steps: deoxidizing the secondary aluminum ash; carrying out hydrolysis treatment on the deoxidized secondary aluminum ash, and carrying out solid-liquid separation to obtain mixed gas, a hydrolysis slurry solid phase and high-salt-alkali ammonia nitrogen hydrolysate; separating and purifying the mixed gas to obtain hydrogen; carrying out at least two times of acid washing treatment and at least one time of alkali washing treatment on the hydrolyzed slurry solid phase to obtain a solid phase product for the concrete admixture; and carrying out ammonia-nitrogen separation on the high-salt-alkali ammonia-nitrogen hydrolysate, and carrying out gradient acidification treatment to obtain aluminum hydroxide and inorganic salt crystals. By implementing the method, high-added-value overall utilization of the secondary aluminum ash can be realized.

An electric pump pressure type liquid oxygen methane rocket main and auxiliary power integrated system adopts an electric pump to pressurize a low-pressure propellant in a rocket storage tank, the pressurized propellant can be controlled to enter an attitude and orbit control engine or return to the rocket storage tank through reversing of a reversing valve, and if the reversing valve continuously supplies the propellant into the attitude and orbit control engine, the propellant can enter the attitude and orbit control engine; continuous and stable work of the attitude and orbit control engine can be realized; if the reversing valve supplies propellants into the attitude and orbit control engine and then immediately switches to the rocket storage tank, pulse work of the attitude and orbit control engine can be achieved through circulation. The reversing valve can keep the electric pump in a normal circulation state at the downstream moment, and the electric pump can work normally and stably no matter whether the attitude and orbit control engine works stably or in a pulse mode. The cavitation pipe is installed in front of the reversing valve, when the attitude and orbit control engine works in a pulse mode, the rotating speed and the power of the electric pump are kept unchanged, the pressure and the flow behind the pump can be constant, the flow entering the attitude and orbit control engine is constant, and it can be guaranteed that thrust generated by the attitude and orbit control engine in each pulse work is constant.

The invention provides a method for forming a groove and semiconductor process equipment, and the method comprises the steps: executing a first etching step, carrying out the downward etching of a to-be-etched film layer of a wafer to a preset depth to form a groove, and enabling the preset depth to be smaller than the target depth of the groove; alternately and circularly executing the first deposition step and the second etching step, and modifying the base angle of the groove into a round angle; wherein in each cycle, the first deposition step is executed to form a passivation layer on the side wall of the groove, the second etching step is executed to etch the groove, and the etching rate of the bottom of the groove is greater than the etching rate of the bottom angle of the groove. According to the scheme, the control difficulty of the groove bottom angle morphology can be reduced, and the control precision can be improved.

The invention relates to a low-cost composite metal catalyst which is a CuO / ZnO / Al2O3 composite metal catalyst, and the molar ratio of CuO to ZnO to Al2O3 is (6-4): (3-4): (0.5-1). The composite catalyst is prepared by the following steps: adding carbonate into a mixed salt aqueous solution of copper salt, zinc salt and aluminum salt for co-precipitation, grinding a filter cake, and roasting at high temperature. According to the catalyst, 1, 12-dodecanedioic acid dimethyl ester which is low in price and easy to obtain can serve as a raw material, 1, 12-dodecanediol is prepared through catalytic hydrogenation under the milder condition compared with the prior art, high yield and low cost are achieved on the premise that the process condition control difficulty is greatly reduced and the process safety is improved, and the problems that in the prior art, 1, 12-dodecanedioic acid dimethyl ester is synthesized, and the cost is low are solved. The technical problems of high energy consumption, expensive catalyst, harsh reaction conditions and difficult realization of industrial production in the reaction process of 1, 12-dodecanediol in the prior art are solved.

The invention discloses an adjustable deck supporting device for floating mounting of a maritime work platform, and belongs to the technical field of ocean platform mounting, the adjustable deck supporting device comprises a supporting base plate, a supporting platform, a bearing hydraulic cylinder, a universal butt joint mechanism, a butt joint device and a three-degree-of-freedom adjusting balance cylinder set, and a via hole is formed in the center of the supporting platform; the bearing hydraulic cylinder is correspondingly arranged in the center of the supporting base plate. The universal butt joint mechanism is correspondingly hinged to the top end of a hydraulic rod of the bearing hydraulic cylinder, and the universal butt joint mechanism penetrates through the via hole and extends out of the supporting platform; the butt joint device is correspondingly arranged at the top end of the supporting platform and is spherically hinged to the universal butt joint mechanism; the three-degree-of-freedom adjusting balance cylinder sets are evenly distributed in the circumferential direction of the bearing hydraulic cylinder, and the supporting platform and the structure on the supporting platform are allowed to be adjusted in a space in a multi-angle rotating mode. The device can bear upper modules with large weight, has the wave compensation capability, improves the floating mounting and butting efficiency, improves the working efficiency of load transfer, and reduces the offshore operation time.

The invention relates to the technical field related to drilling machines, in particular to a mining drilling machine and a drilling rod assembling and disassembling method. Comprising a lifting frame and a drill rod box, a plurality of containing grooves are formed in the drill rod box, a clamping unit is arranged, the clamping unit comprises a transverse moving assembly, a lifting assembly and a transfer manipulator, the transverse moving assembly and the lifting assembly drive the transfer manipulator to move in the transverse direction and the vertical direction correspondingly, and the vertical projection of the transfer manipulator is located in the drill rod box; the transfer manipulator is used for clamping the drill rod and can rotate; the lifting frame comprises a lifting sleeve, and a through hole allowing a drill rod to penetrate through is formed in the lifting sleeve. An overturning mechanical arm is arranged on the side, away from the transfer mechanical arm, of the lifting frame, the clamping center of the overturning mechanical arm is opposite to the through hole, and the overturning mechanical arm is used for driving the drill rod to rotate to the coaxial line of the driving drill rod. According to the mining drilling machine, the width of the drilling machine can be reduced.

The invention discloses a polymerization drying control method and related equipment, and the method comprises the steps that a drying tower parameter set of a polymerization drying system is obtained, and the drying tower parameter set comprises operation parameters with labels; training the initial time sequence model by using the drying tower parameter set to obtain a target drying model; acquiring real-time operation parameters of the aggregation drying system and attribute parameters of the to-be-dried object; the attribute parameters and the real-time operation parameters are input into a target drying model to be processed, and target operation parameters are obtained; and controlling the aggregation drying system based on the target operation parameters so as to perform aggregation drying on the to-be-dried object. The problems that an existing material drying device is basically in a pure manual control state, the complexity of the drying process is increased due to manual control, drying variable coupling is serious, the control difficulty is high, and the drying efficiency is low are solved.

The invention relates to the technical field of precision and ultra-precision machining, and provides a hydrostatic pressure guide rail device which comprises a guide rail and a sliding block which are in sliding connection. A sliding block body oil inlet channel and a sliding block body oil return channel are arranged in the sliding block; the sliding block comprises a sliding block body and a pair of bearing strips, an opening groove is formed in the bottom end of the sliding block body, the guide rail and the pair of bearing strips are located in the opening groove, one side of each bearing strip is fixedly connected with the sliding block body, and the other side of each bearing strip is slidably connected with the guide rail; the combination faces of the sliding block body, the bearing strip and the guide rail are matched, and a gap between the bearing strip and the guide rail forms an oil film bearing area. After the sliding block is designed in a split mode, the sliding block body plays a role in installation, the bearing strips play roles in static pressure supporting and oil film gap adjustment, the difficulty in manufacturing, measuring, assembling and adjusting the static pressure sliding block is lowered, the sliding block bodies with different opening sizes and the bearing strips with different thicknesses can be freely arranged, and therefore the static pressure sliding block can be conveniently assembled and disassembled. The precise adjustment of the oil film gaps is realized, and the consistency of the oil film gaps between the sliding blocks is ensured.

The invention discloses a display screen with a metal frame and a gluing device thereof.The display screen with the metal frame comprises a bottom shell and a screen body assembly, the bottom shell comprises the metal frame, the inner wall of the metal frame is provided with a supporting protruding edge extending towards the inner side, the screen body assembly is placed in the bottom shell and supported by the supporting protruding edge, and the top face of the supporting protruding edge is provided with a glue groove; the metal frame comprises a first side edge and a second side edge which are oppositely arranged, the outer wall of the first side edge is provided with a glue injection hole communicated with the glue groove, the outer wall of the second side edge is provided with an exhaust hole communicated with the glue groove, the exhaust hole is obliquely formed, the end, away from the glue groove, of the exhaust hole is an exhaust opening, and the lower edge of the exhaust opening is higher than the top face of the supporting protruding edge. The depth of the glue groove is gradually increased from the area communicating with the glue injection hole to the area communicating with the exhaust hole, and the glue groove is used for pouring glue liquid making contact with the bottom face of the screen body assembly. The display screen with the metal frame is low in glue injection amount control difficulty and convenient to produce.

The invention discloses a welding device. The welding device comprises a frame body; the first moving module is mounted on the frame body and can move in the first horizontal direction; the second moving module is installed on the first moving module and can move in the second horizontal direction perpendicular to the first horizontal direction; the third moving module is mounted on the second moving module and can move in the vertical direction perpendicular to the first horizontal direction and the second horizontal direction; and the welding module is installed on the third moving module and can move along with the first moving module, the second moving module and the third moving module, the welding module is suspended outside the frame body, and the first moving module is arranged in the inner cavity of the frame body so as to reduce the distance between the welding module and the frame body. Therefore, the welding device has good rigidity and stability, and the welding precision can be improved. In addition, the welding flux device adopts modular design, the moving structure is simplified, the control difficulty is reduced, and the welding flux device can be suitable for various production lines.

The invention belongs to the technical field of unmanned aerial vehicles, and discloses a reconfigurable antenna array based on a combinable and separable unmanned aerial vehicle group, the antenna array is carried on the unmanned aerial vehicle group, and the unmanned aerial vehicle group comprises a plurality of carrying antenna transmitting systems, antenna receiving systems and a plurality of unmanned aerial vehicle units which do not contain antenna sub-arrays but carry other functions. Through three arrangement modes of the antenna array, multi-functionalization of the airborne antenna array of the unmanned aerial vehicle is realized, such as high-resolution two-dimensional imaging, high-resolution three-dimensional imaging, accurate positioning of a specified target, tracking of the specified target, monitoring of a specified airspace and the like. The first unmanned aerial vehicle group is linearly arranged in a single layer, and an antenna array forms a synthetic aperture radar antenna in the movement of the unmanned aerial vehicle group, so that a high-resolution two-dimensional imaging function can be realized; the second type of unmanned aerial vehicle group is arranged in a single-layer two-dimensional array, and the specified target can be accurately positioned when the unmanned aerial vehicle group hovers.

The present application discloses a regulating valve, a humidifier and a fuel cell system, wherein the regulating valve comprises: a core cavity and a first flow channel, a second flow channel and a third flow channel respectively connected to the core cavity are provided in the valve seat, a first valve seat opening connected to the first flow channel, a second valve seat opening connected to the second flow channel and a third valve seat opening connected to the third flow channel are provided in the valve seat, and the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; a valve core is rotatably arranged in the core cavity, and a first valve opening and a second valve opening are provided in the valve core that are connected to each other, and the valve core rotates relative to the valve seat so that the first valve opening is connected to the first flow channel or the second flow channel correspondingly, and the second valve opening is used to connect to the third flow channel. Two flow channels that can be adjusted to be on and off are formed in the valve seat, and the first valve seat opening and the second valve seat opening are connected to the humidifier at different positions, and the cathode reaction gas flows through different lengths of the path, so that the cathode reaction gas has different transmission efficiencies with the humid and hot tail gas, thereby achieving the adjustment of the humidity of the cathode reaction gas.

The invention relates to the technical field of industrial robots, in particular to a simple industrial robot and a working method thereof.The simple industrial robot comprises a first sliding rail, a second sliding rail, a manipulator assembly and a rack assembly; the rack assembly comprises a rack, a spring and a check block, the rack is slidably arranged in the second sliding rail, one end of the spring is connected with the end of the rack, and the other end of the spring is connected with the check block. The manipulator assembly comprises a base, a rotating shaft, a gear, a mechanical arm and a limiting block, and the gear is meshed with the rack; the stability of the position of the rack is kept before extrusion through proper selection of elasticity modulus in the front stroke, so that rotation of the gear is achieved, linear movement of a workpiece rotating in place to a matched structural body can be completed along with synchronous movement of the rack and the gear in the rear stroke, and based on the mechanical linkage, angle transfer of the workpiece can be conducted as needed; and the cost is effectively reduced in a production line scene of reaching an assembly position through a linear path after transferring, and the control difficulty can also be effectively reduced through a mechanical linkage mode.

The invention discloses a bidirectional six-switch buck-boost topology circuit and a control method thereof, and belongs to the technical field of power electronics. According to the scheme, two switch tubes and one inductor are additionally arranged on the basis of a four-switch buck-boost circuit, and an input negative electrode and an output negative electrode are separated through the additionally arranged switch tubes and inductor, so that the problem that when different input source outputs are connected in parallel, a negative bus is directly connected to form circulating current is effectively solved; a loop does not need to judge an input and output voltage relation, the duty ratio of a power switch tube is automatically adjusted directly according to the set voltage, current and energy transfer direction, and the boost-buck state of the topology is determined according to the calculation result of the duty ratio, so that the control on the energy transfer direction is realized; the on / off of the synchronous rectifier tube is determined by the magnitude of the output current. By adopting the scheme of the embodiment of the invention, the circulating current problem caused by multi-path input difference can be solved, the topology control difficulty is reduced, and the control error-tolerant rate is improved.

The embodiment of the invention provides a smart home management method and device, electronic equipment and a storage medium, and relates to the technical field of smart home, and the method comprises the steps that edge equipment obtains first equipment data of smart home equipment, carries out the analysis processing of the first equipment data, and obtains first visual data corresponding to the smart home equipment; the AR device receives first visual data sent by the edge device, displays a management interface corresponding to the smart home device in an augmented reality scene according to the first visual data, and obtains operation data corresponding to a control operation in response to the control operation for the smart home device; the edge device analyzes the operation data, generates a target control instruction for the smart home device, and sends the target control instruction to the smart home device; and the smart home equipment executes the equipment operation corresponding to the target control instruction, so that the control real-time performance and the control efficiency of the smart home equipment are ensured, and the control difficulty is reduced at the same time.

The utility model discloses a conversion stator module, a magnetic drive conveying line and a magnetic drive conveying system. The conversion stator module comprises a shunt stator body, a plurality of first guide assemblies and a plurality of second guide assemblies. The shunting stator body is provided with a converging end, a first shunting end and a second shunting end; each first guiding assembly comprises a first guiding piece and a first driving piece used for driving the first guiding piece to ascend and descend, the first guiding pieces extend in the first direction and are used for guiding the mover module to move between the converging end and the first shunting end in the first direction, and the multiple first guiding assemblies are arranged in the first direction; each second guiding assembly comprises a second guiding piece and a second driving piece used for driving the second guiding piece to ascend and descend, the second guiding pieces extend in the second direction and are used for guiding the mover module to move between the converging end and the second shunting end in the second direction, and the multiple second guiding assemblies are arranged in the second direction. The conveying efficiency of the magnetic drive conveying system can be improved.

According to the disclosed exoskeleton robot joint mechanism with the maintaining function, one end of a connecting rod is fixedly connected to the output end of a driving motor, and the other end of the connecting rod is fixedly connected with a support; a plurality of ratchets are fixedly arranged on the side face of a machine shell of the driving motor, a pawl is arranged beside the ratchets, the tail portion of the pawl is hinged to a support, the middle of the pawl is fixedly connected with a protruding block, the protruding block is connected to the support through a tension spring, and under the tension of the tension spring, the pawl portion of the pawl can be clamped between every two adjacent ratchets. An electromagnet is arranged beside the protruding block and fixedly connected to the support, the protruding block can be attracted by the electrified electromagnet, the tension spring can be further stretched, and the pawl part of the pawl can be away from the ratchet. The base is installed on a machine shell of the driving motor, the circular cover shell and the connecting rod are arranged on the two sides of the driving motor respectively, the circular cover shell is rotationally connected to the base, and the circular cover shell is further fixedly connected with a support of the connecting rod through the connecting cover shell. The joint mechanism is compact in structure, has a posture keeping function and operates stably.

The invention relates to a double-workbench full-automatic wire welding machine which comprises a welding head, a first manipulator, a second manipulator, a first workbench with a preheating function and a second workbench with a preheating function, the first workbench and the second workbench are arranged on the two sides of the welding head respectively, the first manipulator is arranged on the side, close to the first workbench, of the welding head, and the second manipulator is arranged on the side, close to the second workbench, of the welding head. The second manipulator is arranged on the side, close to the second workbench, of the welding head, the welding head is used for machining workpieces on the first workbench and the second workbench, the first manipulator is used for feeding and discharging of the first workbench, and the second manipulator is used for feeding and discharging of the second workbench. The production process is optimized, and the machining efficiency is effectively improved.

The utility model discloses a consumable extrusion rewinding assembly and a 3D printer, and relates to the technical field of 3D printing. The consumable extrusion rewinding assembly comprises a material disc, a driving device, a power transmission device and an extrusion assembly. The tray is used for loading consumables; the power transmission device is arranged between an output shaft of the driving device and the charging tray and drives the charging tray to roll back under the driving of the driving device; and the extrusion assembly is fixedly assembled on an output shaft of the driving device, supplies pass through the middle of the extrusion assembly, and drives the supplies to be extruded out or drawn back under the driving of the driving device. The power transmission device is a one-way power transmission device. The 3D printer comprises a consumable extrusion rewinding assembly and a printing head. By the adoption of the technical scheme, the single driving device controls extrusion, withdrawing and rewinding of the consumables, and the consumable rewinding device has the advantages that the consumables are not stacked during rewinding, the number of motors is reduced, a control circuit is simplified, and cost is reduced.

The invention discloses a magnetic suspension high-speed permanent magnet synchronous motor fault identification and adaptive protection method, and relates to the technical field of motor fault identification, and the method comprises the steps: constructing a full-rank reference variable model; acquiring electrical parameters of the magnetic suspension high-speed permanent magnet synchronous motor; motor parameters of the magnetic suspension high-speed permanent magnet synchronous motor are identified through a full-rank reference variable model, and real-time motor parameters of the magnetic suspension high-speed permanent magnet synchronous motor are obtained; compensation is carried out based on a magnetic suspension bearing control adjustment algorithm, and control errors, generated by motor parameter changes, on the magnetic suspension bearing are counteracted; and regulating and controlling a bearing-rotor dynamic system of the magnetic suspension high-speed permanent magnet synchronous motor based on the compensated control parameters. The method has the advantages that multiple parameter values such as motor stator resistance, inductance and rotor permanent magnet flux linkage amplitude can be accurately identified, magnetic suspension bearing controller algorithm compensation can be achieved, and the control difficulty of a magnetic suspension bearing is reduced.

The invention relates to the technical field of mechanical design and manufacturing, and provides a single-motor anti-backlash mechanical rotating platform. The rotating platform comprises a horizontal adjusting mechanism, a gear anti-backlash mechanism, a truss mechanism and an optical platform. The gear anti-backlash mechanism is arranged on the side face of the rotating base. The single-motor high-elasticity compensation gear anti-backlash mechanism is easy and convenient to control and low in cost, meanwhile, the influence of backlash backlash is solved, backlash errors and kick errors are reduced when an optical platform rotates in the forward direction and the reverse direction, transmission precision and stability are improved, and gear abrasion is reduced. Through the splicing type truss mechanism designed in a lightweight mode, the multi-unit optical platform and the adjusting mechanism, the mechanical rotating platform which is good in rigidity, high in plane precision and large in assembling space can be spliced, assembling is easy, and hoisting is convenient; the rotating platform is especially suitable for large precise instruments such as large telescopes and the like requiring large assembly space.

The invention relates to the field of automatic racks, and discloses a direct rotation type drill rod conveying system and a control method. The direct rotation type drill rod conveying system comprises a drill rod box used for storing drill rods and a transfer manipulator used for converting the axes of the drill rods to be perpendicular to the rotating plane of the rack; the drilling manipulator is arranged on the side face of the drill rod box in a sliding mode and provided with a drill rod positioning sensor, a lifting positioning sensor and a telescopic positioning sensor, through the special arrangement of the transfer manipulator, the drill rod positioning sensor is used for detecting the existence of a drill rod and measuring the height of a pile castellated position of the drill rod; the position of the clamping jaw is comprehensively judged through the lifting positioning sensor and the telescopic positioning sensor, the processor can conveniently judge the displacement of the clamping jaw needing to extend, the clamping process is more accurate, and the probability of drill rod sending collision is reduced.