280results about How to "Control rotation speed" patented technology

The invention discloses a hydraulic excavator flow rate control loop which comprises a hydraulic and electric control loop. The hydraulic excavator flow rate control loop is characterized by comprising two electromagnetic proportional valves and two or-gate type three-way shuttle valve, wherein the electric control ends of the proportional valves are respectively connected with the controller, the input end is connected with a pilot pressure pump of an excavator, the output end is connected with a input opening P1of one three-way shuttle valve, input openings P2 of the two three-way shuttle valves are respectively connected with a front negative feedback valve core and a back negative feedback valve of the excavator, and output openings A of the three-way shuttle valves are respectively connected with a front negative feedback regulator and a back negative feedback regulator. A method comprises the following steps of: receiving sensor signals by a controller; sending electromagnetic proportional valve electric control signals; opening proportional valve and shuttle valve paths; controlling the corresponding negative feedback regulators through the pressure of the proportional valves; and finally controlling the delivery capacity of the pump. The method realizes the limitation on the system delivery capacity through controlling the delivery capacity of the pump by using the electromagnetic proportional valves, so the flow rate maintains the normal state when a rotating or walking device works singly, and the damage to a motor caused by high flow rate is avoided.

The invention relates to a graphene coating aluminum foil coating machine. The machine comprises a base, and an aluminum foil coil, a front tension mechanism, a dust removing mechanism, a transmission mechanism, a vibration mechanism, a coating mechanism, a heating mechanism, a spraying mechanism, a drying mechanism, a back tension mechanism and a storage device arranged on the base; the dust removing mechanism, the transmission mechanism, the coating mechanism and the spraying mechanism are arranged rightly above the section of aluminum foil basal plate in a walking direction of the aluminum foil basal plate; the vibration mechanism and the heating mechanism are arranged below the section of aluminum foil basal plate; the vibration mechanism is perpendicular and corresponding to the coating mechanism and the spraying mechanism; and the heating mechanism is perpendicular and corresponding to the spraying mechanism. The machine is uniform in obtained product coatings, tight in contact with aluminum foil substrates, stable in performance, high in continuity of whole coating process and high in machining efficiency.

The invention belongs to the model facility of hydraulics experiment, and specifically relates to a device for stable, high-speed and variable-angle water entry experiment of rotating body, comprising a transparent water tank, a data acquisition system which the connection is controlled by the industrial personal computer as well as a release device of water entry objects arranged above the transparent water tank, the release device of water entry objects comprises an entry angle protractor and a gas guide rod under flexible connection with a horizontal bracing piece, the bottom sleeve connection of the gas guide rod is arranged with the rotary gear and rotating head motor under coordination with the rotary gear, the motor operation drivers the rotation of the water entry objects. The gas guide rod is under sealed connection with a gas supply device via the high-pressure windpipe, the gas supply device comprises a high-pressure gas cylinder with the electro-magnetic switch valve and a air compressor connecting to the high-pressure gas cylinder, negative or positive pressure is formed in the high-pressure gas cylinder by controlling the operation of the air compressor, so as to control absorption and high-speed release of the water entry objects. The device for stable, high-speed and variable-angle water entry experiment of rotating body can stably release different forms of water entry objects under high-speed rotation at high speed, and can accurately control the object entry angle.

The invention provides a method and device for metal powder preparation based on a controllable magnetic levitation melting technology. The method includes the following steps: one end of a metal wire passes through an electromagnetic field at a constant speed; the metal wire is warmed and melted in the electromagnetic field and forms metal droplets continuously; the metal droplets drop into a gas atomization area continuously; and the metal droplets are impacted, scattered and cooled by high-pressure and high-speed inert gas in the gas atomization area to form the metal powder. The device includes a vacuum cavity, a pair of rollers arranged in the vacuum cavity and a quartz glass tube with two open ends. The axial directions of the two rolls are parallel, the rotation directions of the two rollers are opposite, and a gap between rotation surfaces of the two rollers is matched with the diameter of the metal wire. One end of the quartz glass tube is connected with an outlet of the metal wire, and the other end of the quartz glass tube is connected with a gas atomization nozzle and a powder collector successively. A coil is wound around the quartz glass tube. The method and device for metal powder preparation based on the controllable magnetic levitation melting technology can stably control the flow rate of melting metal liquid and can satisfy industrial production requirements.

The invention provides an automatic polishing system for stainless-steel cups, which comprises a conveying mechanism, a feeding mechanism and an external polishing mechanism, wherein the conveying mechanism comprises a conveying frame, a conveying table unit and a pressing unit; the conveying table unit and the pressing unit are mounted on the conveying frame; the feeding mechanism is mounted on a bracket faceplate of the conveying mechanism and comprises a feeding frame and a motion control unit mounted on the feeding frame; the external polishing mechanism comprises a polishing frame, an abrasive belt control unit and a part motion control unit; and the abrasive belt control unit and the part motion control unit are mounted on the polishing frame. The automatic polishing system for the stainless-steel cups can completely replace manual operation, remarkably improves the working efficiency, lowers the labor cost and increases the automation level of enterprises. Meanwhile, the automatic polishing system for the stainless-steel cups realize accurate control of polishing parameters and can achieve more stable and favorable polishing quality.

The invention discloses a wire harness adhesive tape winding machine. The wire harness adhesive tape winding machine comprises the components of a body, an adhesive tape winding mechanism which is arranged on the body, an adhesive tape winding driving mechanism which drives the adhesive tape winding mechanism to operate, and a wire harness traction mechanism. The adhesive tape winding mechanism comprises an adhesive tape rack base, an adhesive tape shaft, an adhesive tape guiding bracket and a roller pair. The adhesive tape winding driving mechanism comprises a first motor and a belt conveying device. The wire harness traction mechanism comprises a second motor, a wire gland, a dynamic pressure bobbin and a static pressure bobbin. The wire harness is fed between the static pressure bobbin and the dynamic pressure bobbin and is output in the wire gland. The wire harness adhesive tape winding machine is suitable for performing wire harness packaging through diversified adhesive tapes and effectively prevents wire harness scratch. Furthermore a suitable wire gland is correspondingly changed according to the outer diameter of the packaged wire harness. The wire harness adhesive tape winding machine has advantages of effectively controlling movement range of the wire harness, reducing vibration, realizing adjustable and controllable winding process, replacing traditional semi-automatic winding operation, reducing labor intensity, improving production efficiency and obtaining high economic benefit.

The invention discloses a mechanical damping passive pay-off unit. The mechanical damping passive pay-off unit comprises a pay-off wheel and a center shaft, wherein the center shaft is located in thecenter of the pay-off wheel and penetrates through the pay-off wheel. Damping mechanisms are arranged on the two sides of the center shaft respectively. The mechanical damping passive pay-off unit isscientific and reasonable in structure, and safe and convenient to use; because of the damping mechanisms, friction is generated through contact between each damping fin and the corresponding rotary plate, the pay-off speed of the pay-off wheel can be controlled, and the pay-off wheel can carry out pay-off work stably; because of connecting rods, lead screws, threaded rods and nuts, the separationdistance between each threaded rod and the corresponding nut is adjusted by turning the corresponding lead screw to adjust the gluing force between the corresponding damping fin and the correspondingrotary plate, then friction is changed to achieve the effect of having control over the rotating speed of the pay-off wheel, pay-off is smooth and steady, and the tension of cables is kept as well; and because adjusting gears are driven by rotary shafts to rotate, then racks are driven to move upwards or downwards to enable each positioning toothed plate and the corresponding gear to be separatedor be in engagement connection, the gears can rotate freely when each positioning toothed plate and the corresponding gear are separated, and when each positioning toothed plate and the correspondinggear are separated, the gears are locked, the pay-off wheel is locked as well, and the mechanical damping passive pay-off unit is more convenient to use.

The invention aims to provide a hemispherical image acquiring box body of a 3D printer. The hemispherical image acquiring box body comprises a box body, an arranging platform, an image acquiring device and a light source, wherein the box body is a hollow hemisphere; the arranging platform is arranged inside the box body and positioned at the center of the hollow hemisphere; helical guide rails are arranged from top to bottom on the inner wall of the box body; the image acquiring device is mounted on the guide rails and can slide along the guide rails. The hemispherical image acquiring box body of the 3D printer can be used for shooting an object in all directions and is capable of preventing influences caused by human factors and improving the printing quality.

The invention discloses a production device of liquid nitrogen ice cream and a making technology thereof. The production device comprises a pedestal and a support which are fixedly connected. The top of the support is movably connected to a liquid nitrogen tank. A stirring container is arranged inside the pedestal. One side of the pedestal is provided with a motor bracket, the top of which is fixedly connected to a motor. A stirring device is fixedly connected on the motor. The liquid nitrogen tank is connected to the stirring device through a conduit. The invention has the following advantages: the ice cream production device is full-automatic; through cooperation of a PLC control module and a solenoid valve and the motor, addition amount of nitrogen and rotational speed of the motor can be accurately controlled, nitrogen and ice cream are mixed more uniformly, scattering of shaped ice cream due to too high rotational speed of the motor is avoided, ice cream and additives are mixed more fully, mouthfeel of ice cream is greatly improved, and the produced ice cream is externally crispy and internally soft and has unique mouthfeel; and due to addition of nitrogen during the stirring process, preservation performance of ice cream is better.

The invention discloses a circumferential seam single-pass electro-gas welding machine which is mainly composed of a walking track, a cantilever welding machine, an electro-gas welding head, a front side water-cooling slide block, a back-side forming device, a roller frame base, a driving roller frame and a driven roller frame. The cantilever welding machine is installed on the walking track; the electro-gas welding head and the front side water-cooling slide block are integrated to be installed on the cantilever welding machine; the driving roller frame and the driven roller frame are installed on the roller frame base; a barrel to be welded is placed on the roller frame; and the back-side forming device is installed in the barrel during welding. The circumferential seam single-pass electro-gas welding machine has the advantages that the problem of low efficiencies brought by a layer upon layer stacking welding process is solved so that efficiencies are improved; and simultaneously, welding qualities are high, welding control is accurate, and technological blank of the electro-gas welding machine is filled.

The invention discloses a method and device for generating a tightly-focused light spot array of a column polarized vector beam which can be rotated freely. Based on the generation of a column polarized vector beam in the prior art, the polarized direction of the column polarized vector beam is rotated in a way that the beam passes through two half wave plates. Finally, the beam is tightly focused through a microscope objective with a high numerical aperture to obtain array-type focused light spots. Through rotating the second half wave plate, the rotation speed of the focused light spot array is easily controlled. The method provided by the invention is easy to realize, the device provided by the invention has the advantages of simple structure, adjustment easiness and low manufacturing cost. Moreover, the device has good stability and does not need other special optical elements.

The invention discloses a combined type glue coating machine and a use method thereof. The combined type glue coating machine comprises a footswitch, a first control box, an air source FRL, a lower roller, a second control box, a safety protection cover, an upper roller, a supporting frame, a glue coating machine body, a glue coating machine clamp, a supporting rod with a bearing, a base and a supporting frame fixing lock, wherein the safety protection cover is fixedly connected with the top surface of the second control box, and is used for covering the upper roller, the lower roller and the supporting frame. The combined type glue coating machine and the use method thereof can reduce labor intensity of workers and improve the glue coating efficiency and glue coating quality.

This invention relates to one method to control cameral head rotation speed by terminal device, which comprises the following steps: user sets needed cameral head align value and stores the set by needs; the said terminal device is started to get the align value; in rotating of cameral head, the terminal device gets the cameral head rotation speed according to the cameral head speed and informs the speed to the cameral head through said communication interface to control cameral head rotation speed.

This invention discloses a method for ensuring the position deviation of a Hall sensor of a motor direct-drive washing machine applying a brush less DC motor characterizing that a microcomputer acknowledges the counter-electromotive force generated from rotating the rotor by man and the signal sensed by the Hall sensor to compute the potential sensed angle of the sensor and compute the difference between the sensed angle and the potential sensed angle of the Hall sensor on the primary stand and position, the above mentioned compute value of the sensed angle is considered to be stored as the initially acknowledged value.

The invention relates to a melt electrospinning nanometer twisted yarn preparing device and method achieving multi-needle rotary twisting, and belongs to the field of electrostatic spinning. The device mainly comprises a heating rod, a center shaft, a flowing channel, a corner handpiece, an extruding machine, a spreader plate, a rolling ball, a worm rod, a thin-walled container, a copper ring, a conical flow guider, multiple single-needle spray heads, a worm wheel, an acrylic board with a hole, an electrode plate, a high-voltage electrostatic generator, a receiving roller and the like. According to the device and method, the conical flow guider is in threaded connection with the center shaft and is arranged to be coaxial with the thin-walled container; the copper ring is arranged between the upper portions of needle heads and the flowing channel to serve as a sealing device; the single-needle spray heads are annularly arranged, so that the spinning efficiency is improved, and the spinning yield is increased; the single-needle spray heads are in threaded connection with a bottom plate of the thin-walled container, and therefore replacing and cleaning are convenient; by replacing the single-needle spray heads with needle head plugs, the fiber number can be controlled; a worm wheel and worm rod transmission device drives the single-needle spray heads to rotate, the twisting degree and the fiber number are controllable, the fiber diameter is uniform, the applicability of nanometer twisted yarn can be improved, and therefore the requirements in different fields are met.

The invention provides an electromachining method with controllable tool electrode rotating speed for micro-holes and a speed adjustment system, and belongs to the technical field of non-traditional machining. According to the electromachining method, neutral salt solution with the extremely low concentration serves as electrolyte, corresponding voltages are applied to two poles of the electrolyte, the gas film covering status of the surface of a tool electrode is adjusted through control over the tool electrode rotating speed, and if the tool electrode rotating speed is high, discharging reaction occurs when the gas film covering status meets the generation condition of the discharging reaction; if the tool electrode rotating speed is low, electrochemical reaction occurs; and controllable compounding of electrochemical machining and discharging machining is achieved through control over the tool electrode rotating speed. According to the electromachining method with the controllable tool electrode rotating speed for the micro-holes and the speed adjustment system, good surface machining quality and machining consistency can be achieved.

The invention relates to a connection rod type AGV lifting device. The connection rod type AGV lifting device comprises a power output device, a transmission mechanism, connection rods and a top plate; the power output device is in transmission connection with the transmission mechanism; the connection rods comprise at least one first connection rod and at least one second connection rod; the transmission mechanism is hinged to the lower end of each connection rod; the upper end of each connection rod is hinged to the top plate; the lower end of each connection rod moves in the horizontal direction under driving by the transmission mechanism; the lower end of each first connection rod is opposite to the lower end of each second connection rod in movement direction; and the top plate is driven by the connection rods to move in the vertical direction. An AGV provided with the lifting device can be applied to more occasions; and the connection rod type lifting device is stable and simplein structure, steady in transmission, convenient to install and low in manufacturing cost, and the connection rods are connected in a hinged manner so that transmission is more steady.

The utility model relates to an insect trap, include: a main bod. Insect passing part, set up in in the main part for make the insect pass through, air collection dirt portion, set up in the lower part of main part, inhale the fan, be located insect passing part with between the air collection dirt portion, the UVLED installation department, set up in insect passing part's upper portion to be provided with UV LED module, seizure portion, set up in the lower part of air collection dirt portion for catch the insect, wherein, the insect passing part include: a plurality of insect clearing holes can make insect optionally pass through. The utility model relates to a insect trap not only utilizes the ultraviolet ray to lure the insect, the temperature condition liked for the control insect moreover and produce heat or produce carbon dioxide to can further improve and lure the effect.

The invention discloses a stepping blade type robot joint. The stepping blade type robot joint comprises a left end cover, a rolling bearing, a central spindle, child blades, mother blades, an inner meshing gear pair, a needle bearing, a side plate, an oil distribution disc, a right end cover, a rotary oil distribution valve and a stepping motor; the inner meshing gear pair comprises an outer gearcapable of doing planar motion and an inner gear fixed to a central shaft; the central spindle is arranged in the outer gear, can not rotate and is provided with blade grooves and opening grooves; the right end cover is provided with oil ports of an oil supply way and an oil return way, and oil is supplied to oil cavities sequentially through the rotary oil distribution valve; the rotary oil distribution valve is driven by the stepping motor to rotate; and the oil ways sequentially supply oil to the oil cavities, an outer gear small gear is pushed to do planar motion, an inner gear large gearis driven to rotate, and power output is achieved. The stepping blade type robot joint has the advantages of being high in precision, large in output power density and compact in structure.

The invention relates to a word memory device, and particularly relates to an interesting word memory device for primary education. The technical purpose is to provide the interesting word memory device which is used for primary education and is capable of building up an active classroom atmosphere and attracting students' attention, so that the students have high enthusiasm. In order to achieve the above technical purpose, the interesting word memory device includes a bottom plate and the like. A left side plate is arranged on the left side of the top of the bottom plate, and a right side plate is arranged on the right side of the top of the bottom plate, a driving mechanism is arranged on the upper portion between the left side plate and the right side plate, and a display mechanism is connected to the bottom of the driving mechanism. According to the interesting word memory device, the display mechanism is driven to rotate by controlling the operation of the driving mechanism, so that the time for the students to memorize words is controlled, the interest in learning of the students is improved, the effects of building up the active classroom atmosphere and attracting the students' attention are achieved, and the enthusiasm of the students is high.