4222 results about "Suction force" patented technology

The invention discloses a magnetic adjustment water lubricated bearing and a bearing support control method, which are applied to a large ship propulsion shaft system, and comprise a bearing shell, an electromagnetic excitation module, a batten, a sensor module, a power supply driving module and a control system, a plurality of mounting grooves are formed in the bearing shell; an electromagnetic excitation module is arranged in each mounting groove and generates a variable magnetic field with set intensity; a plurality of magnetically soft alloy segments are arranged on the batten, the magnetically soft alloy segments correspond to the electromagnetic excitation modules one to one, and a magnetic field acts on the magnetically soft alloy segments to generate electromagnetic attraction force; the control system independently controls the excitation current of each electromagnetic excitation module according to data of the sensor module, and generates magnetic fields with different intensities to act on soft magnetic alloy areas at corresponding positions, so that precise control of local supporting rigidity and lubricating gaps of the water-lubricated bearing is realized, unbalance loading and abnormal wear risks are effectively reduced, and the service life of the water-lubricated bearing is prolonged. And the adaptive capacity of the bearing under low-speed heavy load and dynamic disturbance is improved.

The speed-adjustable negative pressure drainage device comprises a drainage tube, a bottle body, a cover body and a negative pressure source connector, the cover body is rotated to drive a top ring cambered surface protrusion to jack up a bead body, a through hole is opened according to the angle gradient, external air enters dilution negative pressure, and linear speed regulation without negative pressure source adjustment is achieved; the bead body periodically opens and closes the through holes to form pulsating type instantaneous suction force, so that the adhesive force between blood clots and the tube wall is destroyed, and blockage is actively prevented; the gradient section of the drainage tube accelerates liquid flow through abrupt drop to generate local negative pressure to pull rear liquid flow; the upper convex hulls enlarge the sectional area of a pipe cavity before sharp drop, decelerate liquid flow and form a vortex region, so that blood clots are separated and deposited due to inertia, and liquid-solid layering is realized; the device has the functions of mechanical blockage prevention, precise pressure control and overload protection, the clinical blockage rate is reduced from 30% to 5% or below, power support is not needed, the device is suitable for postoperative drainage scenes such as the abdominal cavity and the thoracic cavity, and the medical operation load and the complication risk of a patient are remarkably reduced.

The utility model provides a self-propelled silage reclaimer, which relates to the technical field of reclaimers, and comprises a self-propelled silage reclaimer assembly, the self-propelled silage reclaimer assembly is provided with a dust collection assembly and an adjusting assembly, the self-propelled silage reclaimer assembly comprises a cutting reclaiming knife and a conveying belt, the dust collection assembly comprises a dust collection cover, and the dust collection cover is provided with a dust collection opening. And one end of the dust hood is connected with a conveying hose. The suction fan works to generate suction force, so that the dust hood sucks and removes flying dust generated during cutting and material taking, the sucked and removed dust and the like are conveyed to the collecting box through the conveying hose, the filter element is beneficial to preventing the dust and the like from entering the suction fan, and normal operation of the suction fan is guaranteed; and finally, the movable sealing plate moves in the sliding groove, so that the sucked dust and the like can be cleaned, the dust spreading in the working area is reduced, the dust attached to the surface of the machine is reduced, and an operator can more clearly observe the running state of each part of the machine.

A system and method to provide a suction device adapted to provide gripping and suction forces to pick up and move a wide variety of objects. This is accomplished through a primary grasping interface composed of a suction compartment, a membrane compartment, deformable membrane sealing said membrane compartment, and at least one pressure mechanism. At least one pressure mechanism is in fluid connection with the suction compartment and is configured to modify properties within the suction compartment to assist in providing gripping and attractive forces. The device will grasp an object with the primary grasping interface by positioning the deformable membrane adjacent to said object, modifying the deformable membrane to conform to and create a seal with said object, and then depressurizing the suction compartment vis the pressure mechanism, providing a suction force onto said object within that sealed area sufficient to grasp said object.

The invention discloses a thickness laser measuring device for corrugated paper packaging box production and a method thereof, and relates to the technical field of laser thickness measuring devices. The concave-convex part of the corrugated board can be extruded through rolling of an air bag of the measurement pretreatment mechanism, flattening is achieved, meanwhile, high-speed airflow generated by an air cylinder purges paper scraps on the surface through air inlet and outlet holes, suction force generated when a piston is reset subsequently can suck the residual paper scraps into a detachable dust collection cylinder, the paper scraps are prevented from blocking a laser light path, and measurement errors are reduced from the source; secondly, in the laser thickness measuring mechanism, a first laser thickness measuring assembly and a second laser thickness measuring assembly move in opposite directions and are matched with the movement of the paperboard along with the conveying belt, measuring point positions in a larger range on the surface of the paperboard can be covered, the contingency of single-point measurement is avoided, a touch switch of a laser thickness gauge can be triggered and starts to work only after the preprocessing mechanism completes the purging action, and the accuracy of measurement is improved. The problem that paper scraps raised during purging interfere with a light path is thoroughly avoided, and the data validity is further guaranteed.

The invention relates to an automobile windshield shelter removing method and system and an automobile, and belongs to the technical field of automobile active safety. The method comprises the steps that the surface of the windshield is monitored through a vehicle-mounted camera; when a shielding object is identified, calculating a view shielding coefficient based on the area, the position, the light transmittance and the type of the shielding object, and determining an initial influence level according to the view shielding coefficient; corresponding cleaning strategies are executed according to the influence levels, windscreen wiper cleaning is started at the low level, pneumatic suction generated by vehicle intersection is used for cleaning at the middle level, and negative-pressure airflow cleaning is induced through dynamic opening of a skylight at the high level; if the shielding is not removed, the influence level is increased step by step, and circulation execution is carried out until the shielding is removed or automatic parking is triggered. According to the method, grading, closed-loop and non-contact intelligent removal of different types of sheltering objects is achieved, and invalid or even harmful operation of a traditional windscreen wiper in a dry sheltering scene is effectively avoided.

The invention relates to the technical field of rotary cultivators, in particular to a rotary cultivator with a residual film recycling function. Comprising a front wheel; first rotating shafts are fixedly connected to one sides of the two front wheels, second rotating shafts are fixedly connected to one sides of the two rear wheels, a recycling machine shell is jointly and rotationally connected between the two first rotating shafts and the two second rotating shafts, and a tillage machine is arranged on one side of the recycling machine shell. Through cooperation of a water pump, a second threaded rod, a spraying bin and a spray head, broken films on a screen mesh plate can be dissolved, soil blocks can be decomposed, the problem that a large amount of time is spent on sorting residual films and straw by workers in the follow-up process is solved, a first motor, an air pump, a second motor and the water pump are controlled through a controller, and the working efficiency is improved. Complex residual film recovery and soil treatment processes are integrated into a highly automatic and intelligent operation system, the soil humidity, the residual film density and the impurity content are monitored in real time through a sensor, the suction force of an air pump and the water pressure of a water pump are intelligently adjusted, and soil moisture loss and energy consumption are reduced to the maximum extent while it is ensured that residual films are efficiently recovered.

The invention relates to the technical field of axial flow fans, in particular to an impeller with S-shaped blades and an axial flow fan applying the impeller. On the axial projection of the impeller, the peripheral contour of each blade is defined by a blade root edge, a blade front edge, a blade outer edge and a blade rear edge, and the blade root edge is connected with the hub; the blade front edge and the blade rear edge are both wavy curves, and the blade root edge and the blade outer edge are both arc-shaped lines with the axis O of the hub as the circle center. Each blade is provided with a pressure face and a suction face, the pressure faces and the suction faces are oppositely arranged, and on the radial projection of the impeller, the pressure faces are arranged in a wave shape in a protruding mode from one end of the blade root edge to one end of the blade rear edge towards the suction faces and then concavely arranged, so that the blades are of an S-shaped structure. The problem that a traditional blade structure cannot meet the use requirements of high efficiency and low noise can be solved.

The invention relates to the technical field of laser dimension detection, and discloses a laser dimension detection device for water pump accessory production, which comprises dimension detection equipment, and the dimension detection equipment is provided with conveying equipment for assembling a plurality of impeller bodies. Meanwhile, under the mutual cooperation of a laser detection assembly and an angle self-adjusting assembly, under the suction effect of an air pump, two suction cup bodies separated from the blade can be tightly attached to the blade, and then under the suction effect of suction cups, a rubber ring fixed to a reset sliding barrel is tightly attached to the blade; according to a traditional detection method, when facing blades with different distortion angles, manual equipment adjustment, clamp replacement or multiple times of measurement are needed to obtain complete data, the operations are time-consuming and labor-consuming, measurement errors are caused by human factors, and the detection accuracy is high. And the laser size detection device automatically adapts to different distortion angles.

The invention relates to the technical field of laser cutting machines, in particular to a grinding machine tool for grinding brake discs, which comprises a square casing, windows are arranged on two sides of the square casing, a parallel moving device is arranged on the inner side wall of the square casing, and a coaxial double-rotation grinding device is arranged on the parallel moving device. An automatic rotating and lifting brake disc integrated device is arranged in the square machine shell. A single motor for realizing rotation and lifting functions of the brake disc is used for driving, in a lifting driving state, a magnet exciting coil of an electromagnetic control device is electrified, a driving disc is attached to a driven disc by utilizing electromagnetic attraction, power is transmitted to a screw rod through belt transmission, and lifting of the brake disc is realized; when the automatic rotation state is switched, the friction plate is separated through power failure, the rotating shaft directly drives the gear column to drive the brake disc to rotate, and compared with traditional multi-motor driving, the number of motors and transmission parts is reduced, the equipment cost and energy consumption are reduced, meanwhile, the machine tool size is reduced, and the space utilization rate is increased.

The utility model discloses a water area propeller and water area movable equipment. The water area propeller comprises a machine body, an operation device and a locking module. A propelling device used for outputting propelling force for propelling the water area carrier to move is arranged at the end of the machine body. The operation device is rotationally connected to the end, away from the propelling device, of the fuselage body through a transverse connecting shaft, can be folded or unfolded with the fuselage body and is used for being operated by a user to control the water area propeller to operate. The locking module comprises a first locking unit and a second locking unit, and the first locking unit and the second locking unit are arranged in the operation device and the machine body respectively. The suction force between the first locking unit and the second locking unit of the locking module locks the operating device and the fuselage body at the position between the transverse connecting shaft and the propelling device, and the operating device forms a cantilever beam capable of loading the fuselage body between the transverse connecting shaft and the locking module.

The invention provides an intelligent control method and system for pressure of a gas collecting pipe of a coke oven, and particularly relates to the technical field of automatic control of the coking production process. According to the method, a coke oven gas collector pressure measured value and an air blower rear pressure value are obtained in real time, and the gas collector pressure change rate is calculated accordingly. When the pressure change rate exceeds a set threshold value, a feed-forward control amount for adjusting the blower speed or the backflow flap opening degree is generated based on the pressure change rate. Meanwhile, the front suction value of the primary cooler is obtained, and feedback control quantity is generated through a feedback control algorithm according to the deviation between the front suction value and the suction set value. And superposing the feedforward control quantity and the feedback control quantity to generate a final control instruction, and adjusting the rotating speed of an air blower or the opening degree of a backflow turning plate according to the final control instruction, so that the measured pressure value of the gas collecting pipe tends to a target pressure set value. According to the method, control delay caused by medium flowing is eliminated, instant and advanced adjustment is achieved, and the problem that control response is not timely is solved.

The invention belongs to the technical field of mixing, and particularly relates to a mixing device and method for flue corrosion protection agent production, the mixing device comprises a mixing barrel and an inner barrel fixedly arranged in the mixing barrel, a cover plate is fixedly arranged on the mixing barrel, a rotating barrel is rotationally arranged on the inner barrel in a sleeving mode, and tooth protrusions are arranged on the rotating barrel; magnetic strips with alternating polarities are fixedly arranged in the rotating barrel in an array manner; wherein a spline sleeve shaft of the telescopic rotating mechanism is combined with a reciprocating groove of a sleeve and a convex rod of an embedded assembly, so that the telescopic mixing paddle can be driven to do composite motion of rotating and lifting, and meanwhile, a movable plate of the telescopic mixing paddle does horizontal reciprocating sliding under the action of attraction force and repulsive force of a magnetic strip and a magnetic block and an elastic telescopic rod, so that three-dimensional composite stirring is formed; the rubber scraping plate moves along with the moving plate, raw materials attached to the inner wall of the inner barrel can be intermittently scraped off, caking of the raw materials is avoided, and when the mounting base synchronously moves along with the moving plate, the inclined sawteeth on the mounting base can effectively cut powder balls in the raw materials.

This invention discloses a laminating device for processing insulation boards, belonging to the field of insulation board processing. The laminating device includes a laminating chamber with three sets of feeding troughs on its side wall. Within each feeding trough, a driven roller, a first suction roller, a second suction roller, and a driving roller are rotatably connected from top to bottom. Three sets of top-loading telescopic rods are evenly spaced at the bottom of the laminating chamber. Guide rails are fixedly connected to both sides of the top of the laminating chamber. This invention utilizes the suction force generated within the suction disc by rotating suction blades, which removes dust from the bonding surface of the raw material board that has passed over the top of the first and second suction rollers, improving the cleanliness of the bonding surface and ensuring subsequent bonding effectiveness. Furthermore, a second pulley assembly agitates the adhesive liquid within the adhesive storage box, effectively preventing coagulation and sedimentation of the adhesive liquid and improving its usability.

The invention relates to a method for manufacturing a hollow turbine blade (10) for a turbine engine, the hollow blade (10) comprising a pressure side wall (16) and a suction side wall (18), an internal cooling channel (28) passing through the pressure side wall and the suction side wall, the invention relates to a method for manufacturing a blade (10), comprising at least a first moulding stage (PH1, PH '1) using a lost wax casting technique using molten metal, the first moulding stage (PH1, PH' 1) comprising at least one step b) of manufacturing a mould (34) made of a refractory material, the inner wall (36) of the mould being matched to the outer shape of the blade (10) to be manufactured, in which step b) the inner wall (36) of the mould (34) is matched to the outer shape of the blade (10) to be manufactured. A plurality of protrusions (52) are formed on an inner wall (36) of a mold (34) made of refractory material, the plurality of protrusions defining an outlet opening counter-shape (30) of an internal cooling channel (28).

The invention aims to provide a portable automatic adjustment negative pressure sputum suction device based on multi-parameter monitoring, which comprises a negative pressure sputum suction device main body used for generating adjustable negative pressure and connected to an airway of a patient through a sputum suction pipe; the respiratory rate sensor is mounted at the inlet of the sputum suction tube and used for monitoring the respiratory rate of the patient in real time; the sputum suction resistance sensor is mounted in the sputum suction tube and used for monitoring the resistance change in the tube in the sputum suction process in real time; the sputum viscosity sensor is arranged between the sputum suction tube and the sputum collection bottle and is used for monitoring the viscosity of sputum in real time; the control unit controls the negative pressure sputum suction device main body to output corresponding negative pressure; the sputum suction device aims at monitoring the respiratory rate, the sputum suction resistance and the sputum viscosity of a patient in real time, a dynamic negative pressure adjusting mode is adopted, the sputum suction efficiency can be improved, and meanwhile damage of excessive suction to an airway can be avoided.

To provide a powder supply device and powder supply method, which allow for supplying a tiny amount of powder.SOLUTION: A powder supply device 1 for supplying powder B is provided comprising a nozzle 2, a suction device 3 for applying negative pressure to the nozzle 2, a filter tip 4 attached to an opening 22 of the nozzle 2 and provided with an adsorptive surface 41 for adsorbing the powder B, a horizontal movement mechanism 52 for horizontally moving the nozzle 2, and a lifting mechanism 53 for vertically moving the nozzle 2. The adsorptive surface 41 of the filter tip 4 is exposed from the opening 22 of the nozzle 2.SELECTED DRAWING: Figure 1

The invention relates to the technical field of cleaning equipment, in particular to a blowing and sucking integrated dust suction device which comprises an airflow circulation part and a dust separation execution part, the airflow circulation part comprises at least two stages of venturi tubes which are sequentially connected in series and communicated, and the venturi tubes are covered with collecting covers; a collecting cavity is formed in the collecting cover, a collecting opening and a backflow opening which are communicated with the collecting cavity are formed in the collecting cover, a backflow pipeline is connected between the backflow opening and the Venturi tube located above the backflow opening, negative pressure is formed around after airflow is sprayed out from the spraying opening at a high speed, and negative pressure suction carries dust-containing gas to enter the collecting cavity from the collecting opening. Then the air flow sequentially passes through the backflow opening and the backflow pipe to re-enter the acceleration channel; a traditional'single-stage acceleration-separation 'open-loop mode is broken through, a'kinetic energy recovery-secondary acceleration-enhanced separation' closed-loop system is constructed through countercurrent coupling of the Venturi tube and the cyclone separator, the closed-loop system completely isolates dusty gas from leaking out, and dual improvement of the energy utilization rate and the dust removal efficiency is achieved.

The invention relates to the technical field of defect detection, in particular to a wind power blade internal defect detection robot which comprises a wind power blade inspection robot body and walking wheels, a mechanical arm set is arranged at the upper end of the wind power blade inspection robot body, and the output end of the mechanical arm set is rotationally connected with a defect detection holder. A multi-suction-cup redundant mechanism is adopted, suction cups are divided into a plurality of sets, the negative pressure value of each set is independently controlled, a plurality of sets of wall contact suction cups distributed in a scattered mode are integrated through a wind power blade inspection robot body, an adsorption-movement cooperative mechanism is formed, and the wall contact suction cups are combined with embedded negative pressure suction cups, so that the negative pressure value of the wind power blade inspection robot is controlled. Elastic deformation is utilized to adapt to the change of the internal curved surface of the wind power blade, air leakage is reduced, adsorption force is maintained, and the walking stability of the robot on the wall surfaces with different radians in the wind power blade is improved while the internal defect detection precision of the wind power blade is further achieved.

The invention discloses a mobile platform for DCM construction of a deep soft foundation in a swell sea area. The mobile platform comprises a suction bucket foundation, a track beam, a sliding system and a bearing platform. The suction bucket foundation is positioned below the track beam; the bearing platform is slidably arranged on the track beam through the sliding system, the suction bucket foundation comprises a suction bucket, a pumping and filling device and a buoyancy pile, the suction bucket is of a bucket-shaped structure with a closed upper end and an open lower end, one end of the buoyancy pile is fixedly connected with the suction bucket, and the other end of the buoyancy pile is used for supporting the track beam; water is pumped out of the suction bucket through the pumping and filling device, sinking and penetrating of the suction bucket foundation are achieved, air is inflated into the suction bucket through the pumping and filling device, floating of the suction bucket foundation is achieved, the suction bucket foundation is adopted, the platform foundation is suitable for deep and thick soft soil areas, rapid installation and pulling-out of the platform foundation can be achieved, recycling is achieved, and the material consumption is reduced. The influence of medium and long period surges on DCM equipment construction can be effectively reduced, the operation window is greatly improved, and the construction efficiency is effectively improved.

The utility model belongs to the technical field of centrifugal fans, and discloses a multi-wing centrifugal impeller and a multi-wing centrifugal fan, the multi-wing centrifugal impeller comprises an impeller disc, a plurality of blades and an impeller circular ring, the impeller disc and the impeller circular ring are connected to the two ends of the plurality of blades, each blade extends towards the circle center of the impeller disc, and the impeller circular ring is connected with the impeller disc. Each blade is provided with a front end and a rear end which are arranged at intervals in the radial direction of the impeller disc and a pressure face and a suction face which are arranged at intervals in the circumferential direction of the impeller disc, the front ends are arranged close to the circle center of the impeller disc, and sand dune type protrusions protruding towards the suction face are formed on the portions, close to the front ends, of the blades. The flow field uniformity and stability of the multi-wing centrifugal impeller are high, the flow channel shrinkage coefficient of the impeller is increased, and therefore the problem that the aerodynamic performance is poor when inlet impact loss and blade tail edge separation loss of airflow of an existing multi-wing centrifugal fan are large is solved.

The invention provides a brake comprising a stator assembly comprising a stator iron core and a coil winding, and the coil winding is arranged on the stator iron core; the hub assembly comprises a hub and magnetic steel, and the magnetic steel and a friction part are arranged on the side, facing the stator core, of the hub; the armature is arranged between the stator assembly and the hub assembly; when the coil winding is electrified, the armature is adsorbed on the stator iron core; and when the coil winding is powered off, the armature is adsorbed on the friction part under the action of the magnetic force of the magnetic steel to brake the hub. During power-off braking, the suction force of the magnetic steel to the armature and the counter-acting force of the hub to the armature are mutually counteracted in the brake and do not act externally, and the axial force of a traditional brake to a motor is eliminated.

The invention relates to the technical field of medical instruments, and discloses a lung cancer atomization device which comprises an atomization bottle body, an atomization outlet is formed in the outer wall of the atomization bottle body, an adjusting cover is arranged at the top of the atomization bottle body, and a liquid storage base is installed on the inner wall of the atomization bottle body. By pressing the air bag, the suction force of the air bag during rebounding enables the liquid inlet valve element to move towards the liquid inlet spring, liquid medicine enters the liquid inlet valve shell through the liquid inlet pipe and then enters the bottom connecting pipe, then the air bag is pressed, and the liquid medicine enables the liquid outlet valve element to move towards the liquid outlet pipe; liquid medicine enters the liquid outlet pipe through the liquid outlet groove in the liquid outlet valve element, then the liquid medicine in the liquid outlet pipe enters the atomizing bottle body, and therefore the problem that when liquid medicine is added into an existing atomizer, an atomizing mask worn on the head and an atomizing bottle need to be taken down, then the liquid medicine is added into the atomizing bottle, and the atomizing mask and the atomizing bottle need to be taken down is solved. And the atomization mask is worn on the face of the patient, so that the patient is more uncomfortable and painful in the process.

The invention discloses a plate flexible laser cutting production line and method integrating uncoiling, flattening and robot grabbing, and belongs to the technical field of metal plate machining. The plate flexible laser cutting production line comprises the steps that S1, an uncoiling and flattening mechanism, a gas-magnetic composite suspension bed and a sorting robot with a Bernoulli gripper are configured; s2, the coiled materials are fed into a suspension bed, the levelness is locked through permanent magnet attraction, and non-contact suspension and locking flat conveying of the plates are achieved in cooperation with the lifting force of a micropore air cushion; s3, laser head follow-up cutting is carried out, and plate local warping caused by thermal stress release is restrained through a permanent magnetic field; and S4, negative pressure lift force is generated through the Bernoulli effect, and when the lift force overcomes the resultant force of the magnetic attraction force, the gravity and the friction force, the workpiece is separated from the crawler belt and stripped from the framework. The air-magnetic composite suspension bed is constructed, the permanent magnet array is used for generating downward background magnetic attraction force, meanwhile, the high-pressure air bellow is used for spraying airflow through the micropore array to generate air cushion lift force, the plate is in a non-contact suspension state, and the risk of surface scratching is remarkably reduced.

A positive and negative pressure integrated dust removal device for a dust explosion area is provided with a dust hood, an exhaust fan, a negative pressure air duct, a positive pressure blowing pipe, a positive pressure comb-shaped blowing opening, a comb-shaped part arranged on the positive pressure comb-shaped blowing opening and a dust filter bag. According to the dust collection device, the exhaust fan is arranged to extract air in the first cavity, so that negative pressure is formed in the negative pressure air duct, dust is sucked, the comb-shaped part guides air in the positive pressure air blowing pipe to face airflow blown out of the positive pressure comb-shaped air blowing opening, and the air in the negative pressure air blowing pipe is blown out of the negative pressure comb-shaped air blowing opening. The dust suction hood is arranged in the second cavity, so that dust in the opening is blown by airflow and limited in the second cavity by the dust suction hood, an exhaust fan is matched to extract the airflow in the negative-pressure air suction pipe, and the dust is sucked into the dust filter bag along the negative-pressure air suction pipe, so that the suction force at the inlet end of the negative-pressure air suction pipe is improved, and the dust in the covering area of the opening is removed.

A pet toy and method for occupying a pet. In one embodiment, the pet toy comprises a cylindrical main body member including a top end having a top wall, a bottom end opposite the top end that is open, and an annular side wall between the top end and the bottom end. The pet toy further comprises a core member configured to insert into the bottom end of the cylindrical main body member, and having a treat container configured to contain a pet treat. The top wall of the cylindrical main body member includes a treat access hole facing toward the treat container when the core member is inserted into the cylindrical main body member, and further includes one or more vents that serve multiple functions including relieving suction forces during use and redirecting saliva into the pet toy to prevent unwanted mess.

The invention relates to metal powder gas atomization manufacturing equipment and method capable of inhibiting satellite powder, the metal powder gas atomization manufacturing equipment comprises a metal smelting system, an atomization cavity and an atomization gas injection system, and the atomization gas injection system is used for atomizing molten metal in the atomization cavity and forming an atomization cone; the device further comprises an energizing electrode, an attraction electrode and a material suction device, one of the energizing electrode and the attraction electrode is connected with positive electricity, the other one of the energizing electrode and the attraction electrode is connected with negative electricity, and the energizing electrode is arranged on a path before molten metal generated by the metal smelting system enters the atomization cavity and used for adding charges to the molten metal and used for adding charges to the molten metal falling from the metal bar. The attraction electrode is arranged in the atomization cavity, located around the atomization cone and used for attracting the charged metal particles; the material suction device comprises a powder suction opening formed in the periphery of the atomization cone and a suction mechanism used for enabling the powder suction opening to generate negative pressure suction force.

A cleaning device and a control method of the cleaning device are provided. The cleaning device includes a cleaner including a cleaner suction device that generates a suction force, a dust bin that collects dirt, a dust bin cover to open and close the dust bin, and a cleaner controller that controls an operation of the cleaner suction device; and a docking station, to which the cleaner is coupleable and decoupleable, to collect dirt in the dust bin based on the cleaner being coupled thereto, the docking station including a cover closing device provided to close the dust bin cover based on the predetermined cover closing condition. The cleaner control unit controls the cleaner suction device to generate a suction force to draw air into the dust bin based on the cover closing device closing the dust bin cover and the predetermined cover closing condition being met.

An extraction cleaner includes a suction nozzle having an inlet path and suction fan configured to provide suction. The inlet path brings liquid and air into the extraction cleaner. Suction fan has a fan entrance, a recovery tank is spaced from the fan entrance. A separator element configured to allow liquid to flow into the recovery tank, inhibit the flow of liquid out of the recovery tank, and inhibit liquid from reaching the fan entrance, or all three. The separator element may be a butterfly valve configured to selectively close the fan entrance. The separator element may be a funnel extending into the recovery tank to block liquid from leaving the recovery tank during inversion. The separator element may be a fan separator adjacent the suction fan, which directs liquid outward, away from the fan separator, within the extraction cleaner, such that liquid is moved away from the suction fan.

The invention provides an axial flow fan blade and a fan comprising the same. The axial flow fan blade comprises a hub and blades. Each blade sequentially comprises a plurality of base circle sections in the direction from the blade inner edge to the blade outer edge. The contour line SP of each base circle section is generated by a first multinomial function; the starting points of the contour lines SP are connected together to form a blade front edge, the blade front edge is a large-radian curved surface, and the blade front edge is generated by a second multinomial function; the chord length L of each contour line SP is generated by a third multinomial function; the suction surface and the pressure surface of the blade in the direction from the inner edge of the blade to the outer edge of the blade are both of a curved surface structure, and the curved surface is generated by boundary mixing of a fourth multi-term function; the end points of the contour lines SP are connected together to form a blade tail edge, and the blade tail edge is of a wavy curved surface structure and is generated by a fifth multi-term function. The blades and the trailing edge of the axial flow fan blade are both based on multi-frequency harmonic superposition collaborative optimization design, the operation power consumption of the fan blade is remarkably reduced while the requirement for the air volume is met, and noise is greatly restrained.