805results about How to "Run smoothly" patented technology

The invention discloses a test machine and a test method for real-time and dynamic observation of end surface torsion friction and abrasion of a friction interface. The test machine comprises a pressure applying device, a rotary platform, a friction interface observing device and an adjusting device, wherein the pressure applying device comprises a lever, a lever bracket and weights, the rotary platform comprises a motor, a shaft encoder and a worm and gear transmission mechanism, the friction interface observing device comprises a high-speed camera, a torque sensor and a pressure sensor, and the adjusting device comprises a level and a vertical adjustable rod element. The axial loading is applied to a lower specimen by the lever and the weights, the rotary platform drives an upper specimen to do reciprocating torsion, the high-speed microscopic camera is used for observing the friction interface, the torsion friction and abrasion tests under different external loads are simulated by the adding and reducing of the weights, the change of the torsion frequency and the like, then the friction coefficient, the abrasion shape and the abrasion chip real-time movement in the friction process are obtained, and the friction and abrasion performances of transparent material in the whole process are evaluated. The test machine has the advantages that the structure is simple, the operation is convenient, and the repetitiveness is high.

The invention provides a novel self-balancing two-wheeled electric vehicle which is provided with two basically parallel wheels which are arranged in parallel on the left and right and can independently rotate. In order to reduce the volume and weight, the frame is omitted, and a foot pedal also serves as a frame. The foot pedal consists of two parts which can independently tilt forward or backward respectively; two wheels are arranged below the foot pedal; the wheels are lower than the upper surface of the foot pedal; and the two wheels are controlled by an electronic self-balancing control system so that the foot pedal is kept at horizontal balance in the front-back direction. A driver standing on the foot pedal can control the vehicle to go forward or backward or turn simply by changing the center of gravity. Therefore, the two-wheeled electric vehicle is flexible in control and stable in operation; and moreover, the vehicle is very light and convenient and easy to carry, and can be applied to multiple fields.

The invention provides a cloth spreading machine with a manipulator cloth clamping mechanism. The cloth spreading machine comprises a making bed, a main machine, a cloth pressing mechanism above the making bed, and the manipulator cloth clamping mechanism arranged on the making bed in a sliding mode. The main machine is provided with a cloth making mechanism, a cloth releasing mechanism is arranged on one side of the cloth making mechanism, a cloth spreading mechanism is arranged on the other side of the cloth making mechanism, a front-positioning cloth spreading mechanism is arranged in front of the cloth spreading mechanism, a cloth feeding mechanism is arranged in front of the front-positioning cloth spreading mechanism, and a cloth cutting device is arranged below the cloth feeding mechanism; cloth materials enter from the cloth releasing mechanism to the cloth cutting device through the cloth spreading mechanism, the front-positioning cloth spreading mechanism and the cloth feeding mechanism, and the manipulator cloth clamping mechanism arranged on the making bed in the sliding mode is matched with the cloth cutting device to cut off cloth materials with setting lengths. The cloth spreading machine has the advantages that the manipulator cloth clamping mechanism is adopted to carry out single-pulling cloth folding, positioning is accurate, precision is high, the cloth is tidily folded, neatness of the two ends of the cloth can be effectively controlled, accuracy of cloth cutting is improved, and working efficiency is high.

The present invention discloses a method for producing magnesium sulfate heptahydrate by using desulfurization wastewater. The method comprises the following steps: (1) pulping, (2) carrying out desulfurization, (3) discharging the pulp, (4) filtering, (5) carrying out concentration, and (6) carrying out crystallization. With the method of the present invention, high value byproducts can be synchronously produced during a flue gas desulfurization process by using a magnesium oxide method. In addition, with the method of the present invention, a stable running characteristic is provided, and quality of the produced magnesium sulfate heptahydrate after desulfurization reaches standards.

The invention relates to a method for processing desulfuration and denitration simultaneously of smoke optical catalysis oxygenation and relative device, belonging to the smoke purifying technique. Said method comprises: guiding the coal-fired smoke into the reactor; filling optical catalyst into the reactor to be illuminated by light, while said optical catalyst is formed by carrier, and the titania and additive in 0.5% mass percentage; said carrier is quartz sand whose diameter is 4-6mm; said optical catalyst is the mixture of titania and the additive. The invention can complete the desulfuration and denitration simultaneously with high efficiency and stable operation, while it can apply the SO2 and NOx in different mass percentages, and the product can be used as muck; said desulfuration and denitration process will not generate pollution, with simple stricture and lower cost.

The invention discloses an overloaded manipulator of a ten-shaft double-gantry. The overloaded manipulator comprises a rack, a first gantry and a second gantry, wherein the rack consists of supporting legs, supports, racks and limit components, wherein first, second, third and fourth supports are connected end to end to form a four-sided frame, and the supporting legs are connected with the four-sided frame in a supporting way; a first rack and first and second mechanical limit devices in an X-axis direction are arranged on the first support, and a second rack and third and fourth mechanical limit devices in the X-axis direction are arranged on the third support; the third and fourth mechanical limit devices are positioned at the two ends of the second rack, and the first and second gantries are respectively arranged on the first and third supports; the first gantry is parallel to the second gantry, and the first gantry moves in X, Y and Z-axis directions to complete the moving of overloaded plates; and the second gantry moves in X, Y and Z-axis directions to complete the moving of small plates. The overloaded manipulator provided by the invention has the advantages of smooth running, low noise, high reliability and long service life, and provides a strong guarantee for the performance of the entire overloaded manipulator.

The invention discloses an inner detection system for submarine pipelines and a detection method thereof. The inner detection system comprises an electronic sealed cabin arranged in a supporting frame. The supporting frame is provided with a supporting roller array, an odometer wheel, a pressure sensor, a temperature sensor and a sound sensor, wherein the supporting roller array, the odometer wheel, the pressure sensor, the temperature sensor and the sound sensor are distributed in an annular mode. The detection method includes: the inner detection system is connected to an upper computer to download signals collected by the sensors, and filtering and noise reduction processing is performed on the signals; traveling mileage of the inner detection system and included angles of the axis of the inner detection system and a local geomagnetic field and local gravitational acceleration are calculated at any time t, and a direction vector of the axis of the inner detection system is obtained through the included angles; the position of the inner detection system at any time is obtained; and whether leakage exists is judged through comparison of processed sound signals, pressure signals and temperature signals, and leakage rate is estimated. The inner detection system for submarine pipelines and the detection method of the inner detection system achieve detection of little leakage, improve detection accuracy, reduce detection difficulty and cost, and shorten detection period.

The invention provides a tandem type oil-electric hybrid unmanned aerial vehicle. The oil-electric hybrid unmanned aerial vehicle comprises a vehicle body, a plurality of electric motors, a plurality of propellers, a fuel oil engine, an alternator, a rectifier, a battery, an accelerator servo and a control circuit, wherein the control circuit detects the electric quantity and charge-discharge status of the battery in real time and controls the rotating speed of the fuel oil engine in a closed manner, thereby controlling the electric quantity of the battery. The tandem type oil-electric hybrid unmanned aerial vehicle has high cruising ability, flies stably and can be applied to remote pipeline patrol and electric line patrol, small-scale express delivery, emergency and relief work which requires high-density takeoff and landing, large-area plant protection operation, long-time unmanned hang photographing, air surveillance, emergency locale information feedback and the like.

The invention discloses a wet-type purification treatment method and device for flue gas of a domestic garbage incineration power plant. An ammonia water quenching device, a power spray activated carbon device and a bag-type dust collector are sequentially connected through air ducts, the air inlet end of the ammonia water quenching device can be connected with the flue gas outlet end of the domestic garbage incineration power plant, and a compressed air system is further connected to the air duct between the ammonia water quenching device and the power spray activated carbon device; a compressed air system is arranged below a dust hopper of the bag-type dust collector, the dust hopper is connected with a flying dust bin through a pipeline, an outlet flue of the bag-type dust collector is connected with a washing and concentration section of a wet-type deacidifying tower through a pipeline, and the wet-type deacidifying tower comprises an absorption section, the washing and concentration section and an oxidizing section; spray nozzles capable of spraying ammonia water are arranged in the absorption section of the wet-type deacidifying tower, a flue gas exhaust pipeline of the wet-type deacidifying tower is connected with defogging equipment, the oxidizing section of the wet-type deacidifying tower is connected with an oxidation air blower, and an ammonia chloride and ammonia sulfate outlet of the oxidizing section of the wet-type deacidifying tower is connected with crystallizing equipment.

The invention discloses an insulator cleaning robot. The insulator cleaning robot comprises a crawling mechanism, a cleaning mechanism, a locking mechanism, a detection mechanism and a battery control system, wherein the crawling mechanism is of a closed circumferential structure, surrounds an insulator string and drives a robot body to continuously move along the insulator string; the cleaning mechanism is of a closed circumferential structure and surrounds the insulator string; the locking mechanism is evenly arranged on the crawling mechanism, and the crawling mechanism is connected with the cleaning mechanism through the locking mechanism; the detection mechanism is arranged on one side of the locking mechanism, and the battery control system is installed on the crawling mechanism. The insulator cleaning robot is simple in structure; due to the overall symmetrical structure, the stability of the robot is good; as the continuous type movement mode is adopted, the movement speed is high, the cleaning mode is simple, the cleaning speed is high, abrasion to coatings of insulators is small, locking is reliable, an adjustment mechanism can be suitable for insulator strings different in structural height and disc diameter, and electrification insulator string cleaning operation and insulator sheet quality detection can be carried out.

This invention discloses a selecting method of service quality route under the condition of dynamic network. The process includes: measuring measurement parameters of all communication links in the network and obtaining the property and the changing condition; determining the weight changing interval and the distribution function of plural service quality measurement parameter on each link based on the original topological structure of the network and the property and changing condition of the link parameter of any one of communication links in the network; determining the limiting value of each measurement parameter based on the service quality order of the connecting request; constructing a set of alternative paths, computing the interval of each measurement parameter of the alternative paths based on the property and the distribution interval of each link measurement parameter on the alternative paths; determining the distribution rule and the mathematical expression of the measurement parameter of alternative paths; computing probability of the alternative paths satisfied with the limitation and selecting the biggest path with the limitation satisfied with the probability as the working route. This invention has advantages of quick computing, stronger direction and direction and can be used for selecting the service quality route under the condition of dynamic network.

The invention discloses a method for designing a forest fire prevention early warning system. The method comprises the following steps that (1) monitoring terminals are distributed at all monitoring points of a forest so as to collect environment information around the monitoring points and then the environment information and position information of the monitoring points are sent to a remote monitoring center in a binding mode; (2) the remote monitoring center is provided with a monitoring data base server and a monitoring software platform and a forest fire alarm model which is set in advance is further stored in the monitoring data base server; (3) the monitoring software platform reads the environment information, newly received by the monitoring data base server, around the monitoring points and conducts data processing, then analysis and comparison are conducted on the forest fire alarm model and the processed environment information, if the forest fire alarm model is matched with the processed environment information, the situation that corresponding forest fire occurs to the monitoring point is judged, an alarming sound is emitted, meanwhile, warning information is generated and a pre-protocoled fire prevention measure scheme is sent to a forest fire prevention center. The method for designing the forest fire prevention early warning system is reasonable in design, low in erection cost, stable in running and reliable in monitoring.

The invention discloses an earth auger for agroforestry planting. The earth auger comprises a support plate, a motor, handles, hydraulic cylinders and supporting legs. Lower ends of the supporting legs are fixedly connected on piston rods of the hydraulic cylinders. Lower ends of the hydraulic cylinders are fixedly provided with shock pads. Lower surfaces of mounting bases are provided with several antiskid spines. The lower end of a spindle is fixedly provided with a tip. The spindle above the tip is fixedly provided with spirally-arranged digging vanes. The support plate is fixedly equipped with a water tank. The bottom of the water tank is communicated with a shower pipe which is provided with a solenoid valve. Left and rights ends of the support plate are respectively provided with the handles which are upswept. The upper end of each handle is provided with a control button which is connected to the solenoid valve through a lead. The device of the invention has a simple structure, operates stably and is convenient to carry. By the device, labor force is saved, and digging efficiency is raised. The device is time-saving and labor-saving, can be suitable for digging of dry and hard soil, has a wide range of application and has long life.

The invention discloses a full-automatic packing method. The full-automatic packing method comprises the following steps: a bag taking sucker of a bag taking mechanism sucks packing bags to position on a bag taking station; a conveying and clamping mechanism clamps the packing bags from the bag taking station, and transversely clamps and conveys the packing bags to a bag opening station; the conveying and clamping mechanism transversely clamps and shifts the packing bags from the bag opening station to a filling station in a bag opening state; a filling and unloading device fills the packing bags in the filling station; after filling is finished, the packing bags are transversely clamped and shifted to a transfer station from the filling station by the conveying and clamping mechanism; thetransfer mechanism clamps the packing bags from the transfer station, and shifts the packing bags into a vacuum cavity of a vacuumizing and sealing device for fixation; and the vacuumizing and sealing device hot seals the upper ends of the packing bags by a hot sealing module after vacuumizing of the packing bags through the vacuum cavity. The packing method is stable in operation, can effectively prevent equipment failures caused by splashing of food materials outside the bags, and greatly improves the packing efficiency.

The invention provides an aerator belonging to the technical field of water treatment, and aiming to solve the problem that in the existing aerator, foreign matters get into a pipeline easily and cause unstable operation of the aerator. The aerator provided by the invention comprises a mounting seat, wherein an inlet air cavity is formed in the middle of the mounting seat; an air inlet is formed in the bottom of the inlet air cavity; an air outlet is formed in the top of the inlet air cavity; a cutting component is arranged above the inlet air cavity; a vibrating diaphragm prepared from a rubber material is arranged at the air outlet and comprises a lamellar positioning part and an inclined sealing part; a supporting frame matched with the shape of the lower surface of the vibrating diaphragm is fixedly connected with the air outlet; the vibrating diaphragm is kept close to the upper surface of the supporting frame; on the supporting frame, an exhaust through hole communicated with the inlet air cavity is formed below the sealing part of the vibrating diaphragm; the positioning part of the vibrating diaphragm is fixedly connected to the supporting frame. Because the vibrating diaphragm is arranged at the air outlet to prevent cement from entering an air inlet pipeline, the aerator is relatively stable in operation.

The invention discloses a water-scavenger multifunctional environmental-friendly ship equipment and a method thereof, relating to a water-scavenger multifunctional environmental-friendly ship. The invention breaks fake vacuoles of blue-green algae cells by pressure so that blue-green algae loses necessary buoyancy so as to fast remove water-level blue-green algae and absorb the blue-green algae in kieselguhr organisms to be subsided to a lake bottom and absorbs nitrogen, phosphorus and organics contained in a lake to be automatically subsided to the lake bottom by a kieselguhr high-efficiency flocculant, so the purposes of fast lake water cleaning, denitrification and dephosphorization are achieved. The water-scavenger multifunctional environmental-friendly ship equipment has simple and compact structure, stable operation and high efficiency of blue-green removing at prows and denitrification and dephosphorization at sterns; the blue-green algae on a processed water body surface is obviously reduced; a water quality detection result shows that the invention can be used as an emergency measure when the blue-green algae is spread in large area; and in addition, a town lake water body repairing technology applying kieselguhr is a cheapest and most effective and efficient technology which has the best effect, fastest repair and effectiveness.

The invention discloses a one-axle multi-cylinder multi-dimensional ball hammer type micro-nano high-energy ball mill. The ball mill is characterized in that a round disk is driven through the rotation of an eccentric shaft driving system and an eccentric shaft support system, a plurality of cylindrical milling tanks are arranged on the round disk, the tank body is driven to regularly swing in a multi-dimension manner up and down, left and right, front and back through the synchronous rotation of the eccentric shaft and the eccentric shaft support system, the ball material in the tank body is thrown up to produce multi-dimensional hammer action, so that fierce impacting, chopping and grinding in multi-dimension can be achieved. Since the multi-dimensional impacting and grinding have no dead angle, the material can be ground into uniform micro-nano powder, the processing efficiency, the yield and the quality of the micro-nano powder are obviously improved; the ball mill has a stable structure, can be easily enlarged to form the scale production, and is suitable for the demand of nanometer application engineering.

The invention discloses a deep-sea anchor-system subsurface-buoy system based on satellite communication data real-time transmission. The deep-sea anchor-system subsurface-buoy system comprises a water-surface buoy system, a vertically-arranged plastic covered steel cable, a secondary floating body, an anchoring mooring part, a releasing unit, a primary floating body and a plurality of glass floating balls, and the deep-sea anchor-system subsurface-buoy system also comprises a frame body arranged between the main floating body and the releasing unit and used for carrying deepwater measuring apparatuses; a lifting adjusting mechanism for driving all the deepwater measuring apparatuses to move up and down along the plastic covered steel cable to measure measurement data of sections at different water-depth portions is arranged on the frame body. Through the lifting adjusting mechanism, continuous data monitoring of underwater preset depth distance sections can be achieved, and the void that continuous collection of section information under all temperature-salinit deepwater in different water depths cannot be carried out at present is filled; automatic control is achieved through a controller, the structure is reasonable, and running is stable; through an arranged lifting-adjusting auxiliary part, the resistance of the frame body in the ascending or descending process along the plastic covered steel cable is smaller, and running is more stable.

The invention provides a compound artificial wetland system and a pretreatment method for drinking water sources, which relate to a pretreatment system and a treatment method for drinking water and solve the problems of low removal efficiency of matters of micro organic pollutant, ammooinacal nitrogen, biotoxins, which exist in current raw water with large quantity, relatively high cost for deep treatment and still being difficult in mass deep treatment. The system of the invention is formed by connecting raw water, water transmission pipelines, a grit chamber, a subsurface artificial wetland with up and down baffling streams and a surface waveform artificial wetland. The method comprises the steps that: (1) an artificial wetland pretreatment system is used; (2) aquatic plants such as arundo donax var versicolor, etc. with higher COD and TN degradation efficiency are selected among current plants as wetland plants; (3) bacterias are evenly distributed in a filling layer; (4) part of water discharged from the grit chamber is input into the surface flow waveform artificial wetland and effluent water after the treatment of the surface waveform artificial wetland is input to a water tank. The system and the method has low investment, stable and reliable operation, simple operation and low cost for maintenance and operation.

The invention discloses a multi-cam self-adaptive multi-gear automatic transmission. The transmission comprises a box body, a power input shaft, a power output shaft, a self-adaptive variable-speed high gear assembly, a first gear assembly and a self-adaptive variable-speed n-gear assembly, wherein the output revolving speed of the n-gear assembly is lower than that of the high gear assembly and higher than the first gear assembly, and the n-gear assembly comprises a second gear, a third gear......and an nth gear. The multi-cam self-adaptive multi-gear automatic transmission has all the advantages of an existing cam self-adaptive automatic transmission, and is of a multi-cam multi-gear structure, therefore, sensitivity in the gear shifting process is ensured, jerking and jam during gear shifting are eliminated, driving comfort is improved, furthermore, energy is saved and consumption is reduced; the dynamic property, economical efficiency, driving safety and driving comfort of a vehicle are greatly improved. In addition, by means of the power output shaft, cams and the cooperative relationships among the cams, a cone clutch is locked after separation, elimination of the transmission gaps among transmission components is facilitated, transmission precision and efficiency are improved, and drive energy is saved.

The invention relates to a medium-long term forecasting method for wind power, which is characterized by comprising the following steps of: (1) collecting global large-scale meteorology forecasting field data, and providing an initial field and side boundary condition of 7 days for a WRF (Weather Research Forecast) mode; collecting topography, vegetation and sea temperature data for providing underlying surface information for the WRF mode; (2) building the WRF mode to calculate meteorology field information; (3) inputting the large-scale meteorology forecasting field data collected in the step (1) and the underlying surface information into the WRF model to obtain the wind direction and the wind speed forecasting data within the wind field range; and (4) solving the output power of each fan according to the forecasted wind speed by a fan power curve, and accumulating to obtain the total output power of the wind field. The medium-long term forecasting method can accurately forecast the wind power in future 7 days in the WRF mode, has long forecasting time, operation stability, flexible forecasting scheme and few limitation conditions, and does not need the historical operation data of the wind field.

A marinated washer, which is made of bearing, buffle tube, circular water pump, below aqueduct, heave mandril, strap transmission, dehydration electromotor, hydrocylinder, abstersion inner tube, superior capping, superior capping gemel, superior capping lock, superior aqueduct, below return pipe, drainpipe, drain valve, water control, hydraulic pump and so on elements. Its trait is the washer set wash tub(13), suppleness deflector rod(16), gimbals(23), floating type abstersion head(24), axial ratchet wheel institution(26), water storage tank (33), the gimbals(23) is on the superior capping(21) that is reduce the float when dehydrate. The floating type abstersion head (24) set below the superior capping (21) which is fixuped with superior capping lock (22) on the top of abstersion inner tube (14) by the superior aqueduct (20) that is support the floating type abstersion head (24). The wash tub (13) is set in abstersion inner tube (14). This washer lotion is high and the action reliability is high, save water.

A numerally controlled stereolocating instrument for insertion diagnosis and radiotherapy and chemicotherapy of tumor is composed of horizontal and vertical linear drive units, beam turning-over mechanism, the angle shift sensor, rotating mechanism, pitching mechanism and inclination sensor of the guide platform, the elastic locking mechanisms of laser pens for line and dot projections, electric control box, PC numeral control system and reference plate.

The invention provides a control method and device for the exhaust gas temperature of an air conditioner and the air conditioner. The control method for the exhaust gas temperature of the air conditioner comprises the steps that the exhaust gas temperature of a compressor is detected; the exhaust gas temperature is compared with a first preset temperature; if the exhaust gas temperature is greaterthan the first preset temperature, the air conditioner is controlled to enter a temperature control state; the refrigerant circulation quantity is obtained; based on the exhaust gas temperature and the refrigerant circulation quantity, the frequency of the compressor is adjusted. According to the control method and device, the situation can be avoided that due to the excessively low refrigerant circulation quantity, the exhaust gas temperature of the compressor cannot be lowered; it is guaranteed that the exhaust gas temperature can be lowered.

The invention discloses an automatic steel casing cutting device with a positioning function. The automatic steel casing cutting device with the positioning function comprises a work table and a carrier plate, and is characterized by further comprising a material stirring mechanism, a material overlapping induction mechanism, a cutting mechanism and a position limiting mechanism, wherein a slide rail used for material feeding of a steel casing material belt is arranged on the work table, the material overlapping induction mechanism is arranged at the rear of the work table and above the steel casing material belt, the material stirring mechanism which drives the steel casing material belt to advance is arranged at the front end of the material overlapping induction mechanism, the cutting mechanism is arranged at the front end of the material stirring mechanism, and the carrier plate is arranged beside the cutting mechanism. The automatic steel casing cutting device with the positioning function is simple in structure, convenient to use, high in machining precision and convenient in material feeding, can rapidly locate the material belt and the carrier plate, and facilitates induction of material overlapping of the material belt, and then can send an alarm.

The invention discloses a neurology department clinical training and massaging device and a use method thereof. The clinical training and massaging device comprises a base. A first electric push rod is arranged on the back side of a lifting seat. A fixing device is arranged at the upper end of the first electric push rod. A head nerve physiotherapy helmet is arranged at the lower end of the fixingdevice. A limiting slide groove is formed in the right portion of the base and internally provided with a threaded rod. A movable base is arranged on a threaded slider. A machine frame is arranged atthe upper end of the mobile base. The two ends of the machine frame are provided with training rotating plates. Leg nerve training and massaging devices are arranged on the training rotating plates.A supporting plate is arranged on the base and provided with a second electric push rod. The upper end of the second electric push rod is connected with a lifting training table. The upper end of thelifting training table is provided with hand nerve training and massaging devices. The neurology department clinical training and massaging device is stable in structure, convenient to use and adjust,diversified in function and stable in control, can achieve the training and massaging functions of leg nerves of a patient and the training and physiotherapy functions of hand nerves of the patient,and meets the use requirements for clinical training and massaging in the current neurology department.

The invention discloses a multifunctional roller coater which comprises a rack, a coating system, a roller adjustment system and a control system. The coating system comprises a roller set and a conveying mechanism, the roller adjustment system comprises a horizontal adjustment mechanism and a vertical adjustment mechanism, the horizontal adjustment mechanism is used for adjusting the distance, in the horizontal direction, between steel wheels and soft rubber transfer printing wheels, and the vertical adjustment mechanism is used for adjusting rollers to be vertically lifted. According to the multifunctional roller coater, the horizontal distances between the rollers and the positions, in the vertical direction, of the rollers can be conveniently and rapidly adjusted to achieve the aim that the coating thickness and the thickness uniformity are controlled; as the roller set and the conveying mechanism can be effectively assembled and matched, the whole coating system is stable in running, accurate in operation and long in service life, and meanwhile due to the fact that the steel wheels with patterns on the surfaces are adopted, a product can have multiple surface effects, coating is even, and the quality is good.

The invention discloses an arc core-pulling device for a die, which mainly comprises a movable die insert panel, a teeth row oil cylinder, a teeth row, a fixed gear, a movable gear, a U-shaped gear and a bending core, wherein the movable die insert panel is installed on a movable die, a rod end of a piston rod of the teeth row oil cylinder is connected with the teeth row, the fixed gear is rotatably installed on the movable die insert panel, and the U-shaped gear is installed in the movable die and located below the movable die insert panel; and the movable gear is rotatably connected with one end of the bending core, the outer teeth of the movable gear are respectively engaged with the outer teeth of the fixed gear and the arc inner teeth of the U-shaped gear, and the bending core is slidably connected to the interior of a bending groove of the movable die insert panel. Because the U-shaped gear is provided with the arc inner teeth, the movable gear engaged with the U-shaped gear moves along an arc inner teeth surface to drive the bending core to be stably pulled out from a die cavity. The fixed gear, the movable gear and the U-shaped gear are engaged with each other to realize power transmission as well as stable and reliable running.

The invention relates to a screw rotor end face tooth type for a double-screw pump and a twin screw compressor. The screw rotor end face tooth type is formed by multiple miscellaneous tooth curves, wherein each tooth curve comprises a cycloid curve, a circular arc, a circular arc envelope curve, an ellipse arc, an ellipse arc envelope curve and the like. The screw rotor end face tooth type has the technical characteristics that: the tooth curve on a screw rotor end face is formed by five sections of tooth curves which comprise a cycloid curve tooth curve abc, a circular arc tooth curve cde located on a dedendum circle, a circular arc tooth curve ija located on an addendum circle, an ellipse arc tooth curve efg, and an ellipse arc envelope curve tooth curve ghi by taking the ellipse arc tooth curve efg as a baseline; and a section of circular arc or two sections of circular arcs can be simultaneously added on the two sides of the ellipse arc respectively to form four different combination schemes. The screw rotor end face tooth type provided by the invention can realize strict (complete) seal, and a contact line generated through meshing is shorter; and the double-screw pump or the twin screw compressor produced by applying the invention has the advantages of high volumetric efficiency, high medium pressure capable of being delivered, and the like.

The invention relates to online adjustable exciting vibration equipment, which is applied to equipment which requires variable exciting force such as a vibration sieve, an activation feeder and the like. The equipment comprises an installation platform, a vibration exciter and servo motors, wherein the servo motors re controlled by a PLC (Programmable Logical controller) control system; two shortshafts which are bilaterally symmetrical and coaxial with each other are arranged in the vibration exciter; eccentric blocks are fixed on the short shafts; the two short shafts are connected with corresponding servo motors through shaft couplings respectively; and the servo motors are fixed on the installation platform. The entire set of equipment runs stably and has low noise; an include angle can be formed between the two eccentric blocks by controlling the phase angles of two servo motor shafts; the frequency and the magnitude of the exciting force can be adjusted conveniently without halting, so that the working efficiency is greatly increased, and the requirements of different exciting forces on different occasions can be met; due to the adoption of the PLC control system, adjustmentis more accurate and reliable; the vibration exciter has high internal airtightness, is flexible for disassembling and assembling, and is convenient for maintaining; and a plurality of installation and positioning ways are adopted for the vibration exciter, so that the concentricity of the two eccentric blocks is fully ensured.