48results about How to "Efficient and stable output" patented technology

The invention discloses a crushing, grading and separating device for kaolin raw ore, which comprises a casing, the upper end of the casing is provided with an upper cover, the middle part of the upper cover is provided with a feeding hopper, and the casing is provided with a left rotating shaft, a right rotating shaft, and a left crushing wheel. , right crushing wheel, concentrated guide plate, fixed grinding protrusion, grinding disc, rotating protrusion, vertical shaft, primary screen filter, first vibration motor, fine screen filter, second vibration motor, tailing deflector, The third vibrating motor is provided with a driving gear and a driven gear on the periphery of the left and right shafts, a first motor is provided at the end of the left shaft, and the right wall of the housing is provided with a primary sieve discharge pipe, a primary sieve collection box, a first return pipe and The tailings discharge pipe, the left wall of the shell is provided with a fine sieve discharge pipe, a fine sieve collection box and a second return pipe, and the lower end of the shell is riveted with a second motor, a support rod, a support sleeve, a damping spring and a shock absorber filling. The invention can efficiently grind and pulverize the kaolin and sieve and classify it.

The invention discloses a reaction technology for converting an oxygen-containing compound into aromatic hydrocarbons by using a moving bed process. The technology comprises the following steps: preheating the oxygen-containing compound and a diluent, carrying out mixing preheating, reacting in the presence of an aromatization catalyst in an aromatization reactor in order to generate a mixed effluent, sending the mixed effluent to a cooling separation unit, carrying out dehydration and oxide removal, separating to obtain main products comprising benzene, toluene, xylene and other byproducts; circulating the other byproducts, benzene and toluene to the aromatization reactor as return hydrocarbons for a reaction; removing carbon-deposited aromatization catalyst particles from the aromatization reactor when the conversion rate of the oxygen-containing compound under the catalyst in the aromatization reactor is lower than 99%, regenerating in a regenerator, and adding the regenerated catalyst to the aromatization reactor. The technology improves the stability and the activity of the catalyst, and improves the selectivity of the aromatic hydrocarbons especially xylene through recycling product hydrocarbons.

The invention discloses an integrating sphere type light-catalyzed reaction measuring system which is originally designed aiming at the problem that the most basic evaluation parameters respectively represent apparent quantum yield in the light-catalyzed reaction process and can theoretically research and solve the actual efficiency evaluation in the light-catalyzed process. According to functions, the system mainly comprises a light system part and a hydrogen system part which are organically coupled, wherein in the light system part, a light inputting and measuring system comprises a light source, a light path, a monochromator and an integrating sphere and a spectrometer; in the hydrogen system part, a light-catalyzed reaction and measuring system comprises a reaction vessel, a liquid storage vessel, a peristaltic pump, a gas differential detector and the like. The system realizes the synchronous measurement of reactive light absorbing property and the performance for producing hydrogen by light catalysis and can deeply research the light-catalyzed reaction process.

The invention relates to an ozone discharging tube, an ozone discharging chamber and a vertical type ozone generating device. The ozone discharging tube comprises a discharging medium tube and a high voltage electrode rod arranged in the discharging medium tube, wherein the discharging medium tube is a titanium quartz glass tube, a chromium layer is coated on the outer wall of the quartz glass tube, and a spring piece is supported between the discharging medium tube and the high voltage electrode rod so as to form a ring-shaped discharging gap; the ozone discharging chamber comprises an upper honeycomb end plate, a lower honeycomb end plate and a plurality of ozone discharging tubes; and the vertical type ozone generating device comprises an air inlet cavity, an air outlet cavity and the ozone discharging chamber. The vertical type ozone generating device has the advantages of high ozone production efficiency, high operation reliability, simple structure, convenience in assembly and low production cost and can be used for manufacturing a large-scale ozone generator; therefore the industrial production of the vertical type ozone generating device can be realized very easily.

The invention relates to a full sold serial pump laser, belonging to the technical filed of laser. In the prior art, the scheme that two pump sources pump two laser gain mediums in a composite cavity in a point-branching mode, thus having the disadvantages of complex structure, high price and difficult debugging, and serious gain competition exists in a single gain medium and double-wavelength resonance scheme, thus efficient and stable double-wavelength resonance is difficult to obtain. The laser is formed by compounding two resonant cavities, the first resonant cavity is composed of a first reflecting mirror and an output coupling mirror, and a first laser gain medium is arranged in the first resonant cavity; the second resonant cavity is composed of a second reflecting mirror and the output coupling mirror, and a second laser gain medium is arranged in the second resonant cavity, meanwhile, the second reflecting mirror and the second laser gain medium are arranged between the first laser gain medium and the output coupling mirror; the two resonant cavities use one output coupling mirror; a pump source pumps the first laser gain medium; and a frequency crystal is arranged between the second laser gain medium and the output coupling mirror. The scheme can obtain coherent radiation within the waveband from 480 nm to 510 nm.

The invention discloses a terahertz gyrotron gallery mold backward wave interaction circuit and a control method thereof. According to the circuit and the control method, two gradation structures areled into a main cavity body, so that the nonuniformity of the circuit is improved; the cut-off frequency of a main high angular index competition mode is higher than that of an operating mode, so thata start oscillation characteristic of the circuit is that the circuit is particularly sensitive to a nonuniform circuit in a single-cavity oscillation state; a start oscillation current curve is greatly improved and effectively inhibited; and single-mode stable high-efficiency output of a high-order gallery operating mode is achieved. The circuit can specifically inhibit mode competition nearby the high-order gallery mode in a terahertz gyrotron backward wave oscillator; the operating stability and the operating efficiency of the gyrotron backward wave oscillator can be improved; and the significance from microwave and millimeter wave bands to a terahertz wave band is important for the gyrotron backward wave oscillator.

The invention relates to the field of sodium-ion batteries and discloses a perfluoro sodium polymer electrolyte, a preparation method and an application of the perfluoro sodium polymer electrolyte, anall-solid-state sodium-ion battery and a friction nano-generator system; the preparation method of the perfluoro sodium polymer electrolyte comprises implementing ion exchange between perfluorinatedsulfonic acid resin and a Na+ containing solution. The provided all-solid-state sodium-ion battery comprises the above perfluoro sodium polymer electrolyte, and in addition, compared with a battery using a liquid electrolyte, the all-solid-state sodium-ion battery is excellent in safety and the energy density is higher.

The invention discloses a double-rotor unmanned aerial vehicle which comprises a vehicle body, a power system and a rotor system; the power system comprises two power output mechanisms fixed on the vehicle body, a synchronizing shaft in transmission connection with the power output mechanisms and a helicopter speed reducer; the helicopter speed reducer comprises a main box body, a rotor wing shaftcapable of rotating relatively and penetrating through the main box body up and down, a bevel gear fixedly arranged on the rotor wing shaft in a sleeving mode and a bevel gear shaft matched with thebevel gear; the power end of the bevel gear shaft is correspondingly and fixedly connected with the synchronizing shaft; according to the invention, the parallel operation of the two engines is realized by one parallel operation speed reducing mechanism, the total output power of the system is improved, and the two engines can work simultaneously or independently. A steering engine driving assembly, a tilting tray assembly and a total-moment sliding rod assembly are in modular design, so the structural complexity is reduced, and operation such as design, debugging and maintenance of the rotorsystem is simplified.

The invention discloses a three-wavelength laser device without gain competition and belongs to the technical field of laser. The prior art has the problems of intense gain competition between different transition spectral lines, large waste heat generation amount of the laser device, and high Stokes frequency shift and low Stokes efficiency of pump light photons and laser photons. The three-wavelength laser device consists of a long resonant cavity and a short resonant cavity, wherein the short resonant cavity is formed in the long resonant cavity; the long resonant cavity and the short resonant cavity share a light path and an output coupling mirror; a pump is positioned on the light path outside a total reflecting mirror of the long resonant cavity; a condensing mirror is positioned on the light path between laser crystals of the long resonant cavity and the short resonant cavity and outside the total reflecting mirror of the short resonant cavity; the pump is an 885nm semiconductor laser pump or an 888nm semiconductor laser pump; the laser crystal of the long resonant cavity is a non-bonded laser crystal and generates quasi-three-energy-level laser lambda 1; and the laser crystal of the short resonant cavity is a bonded self-Raman laser crystal and generates four-energy-level laser lambda 2 and self-Raman laser lambda 3. The three-wavelength laser device is used for obtaining three-wavelength laser, and the three-wavelength laser serves as fundamental frequency light to obtain new wavelength laser by frequency mixing.

The invention discloses a self power generation type environment-friendly gas stove. The self power generation type environment-friendly gas stove comprises a panel, a bottom casing, a gas mixing chamber, a storage battery, a pulse igniter and a power generation device, wherein the bottom casing is arranged at the bottom part of the panel; the interior of the bottom casing is provided with an accommodation space; the power generation device is arranged in the accommodation space; the power generation device comprises a temperature difference power generation fin unit, a cooling medium bin anda heat radiating fin unit, the output end of the temperature difference power generation fin unit is electrically connected with the input end of the storage battery to charge power for the storage battery, the output end of the storage battery is electrically connected with the input end of the pulse igniter, and a spark plug of the pulse igniter extends into the gas mixing chamber; the cooling medium bin is connected with the temperature difference power generation fin unit, so as to reduce the temperature of the temperature difference power generation fin unit; the heat radiating fin unit is connected with the cooling medium bin, so as to improve the heat radiating efficiency of the cooling medium bin. The self power generation type environment-friendly gas stove has the advantages thatthe temperature difference power generation fin unit is used for charging power for the storage battery, the charging efficiency is high, and the automatic charging function is realized; the storagebattery can be used for a long time without replacement, so as to avoid pollution to environment.

A device includes a first sensor configured to generate a first output signal corresponding to an energy of a portion of a forward beam transmitted by a mirror of a laser resonator system. The device further includes a second sensor configured to generate a second output signal corresponding to an energy of a portion of a return beam transmitted by the mirror. A ratio of the energy of the portion of the forward beam and the energy of the portion of the return beam corresponds to a measurement of a feedback ratio of the laser resonator system.

A grid-connected photovoltaic generation system taking regard of cloud shielding comprises a control module and an electrical module. The control module is connected with and is configured to control the electrical module; the electrical module is composed of a photovoltaic array, a switch matrix, a DC / DC converter, a grid-connected inverter and a transformer; the control module is the configuration control algorithm; the photovoltaic array is composed of a plurality of photovoltaic modules; the photovoltaic modules are connected with the switch matrix, the switch matrix is connected with the DC / DC converter, the DC / DC converter is connected with the grid-connected inverter, the grid-connected inverter is connected with the transformer, and the transformer is connected with the power grid; the power grid is connected with the grid-connected inverter and the DC / DC converter through an inverter control circuit; the switch matrix is connected with the DC / DC converter through an MPPT solar energy controller; the configuration control algorithm is connected with a plurality of photovoltaic modules; and the control module is connected with the switch matrix through the switch matrix driving circuit. The grid-connected photovoltaic generation system taking regard of the cloud shielding improves the disadvantage of the cloud shielding problem of a traditional photovoltaic power generation system to allow the photovoltaic generation system to keep stable and efficient output in the condition of cloud shielding.

The invention discloses a fuzzy PID control method of an inverter power supply, relates to the field of new energy grid-connected power generation for smart grids, and is mainly applied to the inverter power supply. According to the control method, a fuzzy PID control algorithm is adopted, a DSP (digital signal processor) controller serves as the core, a high-frequency inverter, a high-frequency transformer, a full-bridge active rectification module, an active clamping block, a low-frequency inverter, an output filter module and other modules are controlled by calling the fuzzy PID control algorithm and according to a corrected SPWM control signal and a 50 Hz pulse signal, and expected 220 V / 50 Hz sine alternating current is obtained. The control method is simple in structure, reliable in work, high in efficiency and widely applicable to the new energy grid-connected power generation field.

The invention relates to the field of spraying devices, in particular to an automatic large-range pesticide spraying device and application. The automatic large-range pesticide spraying device comprises a portal frame used for advancing, and driving equipment used for driving the portal frame to advance in the pesticide spraying process is arranged on the portal frame. The device further comprises a spraying mechanism which is used for spraying pesticides to tobacco plants in a large range and is arranged on the portal frame. A speed-adjustable driving mechanism is arranged on the portal frame and is in transmission connection with the spraying mechanism. The portal frame is further provided with a filtering mechanism used for purifying and filtering liquid medicine, the filtering mechanism is in transmission connection with the speed-adjustable driving mechanism, and the filtering mechanism is communicated with the spraying mechanism and a pesticide storage box through pipelines. According to the automatic large-range pesticide spraying device, large-area pesticide spraying management on crops is achieved, the defect that an existing spraying device is poor in spraying effect is overcome, and the filtering mechanism can filter and purify pesticide liquid and play a role in stirring.

The invention provides a fuel cell flow field plate and a fuel cell, relates to the field of fuel cells, and is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells. The flow field plate comprises an air inlet, an air outlet, a flow channel, a ridge, a groove and a boss, wherein the groove and the boss are formed in the bottom of the flow channel, are distributed at the bottom of a flow channel ditch along the flow channel direction and are respectively positioned on two polar plates. According to the flow field plate, the grooves and the bosses are arranged on the wall surfaces of the bottoms of the flow channels of the two polar plates respectively, and when the fuel cell is assembled, the grooves and the bosses are meshed with each other, so that the two polar plates cannot move relatively. The groove and boss structures in the flow channels divide the interface of the liquid drop and the wall of the flow channel, so that the effective contact area of the liquid drop and the wall of the flow channel is reduced, liquid water is prevented from forming a continuous water film, the discharge of the liquid water is facilitated, and the flooding phenomenon is relieved. And meanwhile, due to the existence of the groove and boss structures, airflow disturbance is further enhanced, the convective heat exchange area is increased, and the mass transfer and heat exchange capacity of a flow field is improved.

The invention discloses a helicopter rotor wing operating device. The helicopter rotor wing operating device comprises a steering engine drive subassembly, a swash plate subassembly and a total torqueslide bar subassembly, wherein the steering engine drive subassembly comprises three linear steering engines having tail ends rotatably connected with an engine body, and three L-shaped operating arms which are correspondingly disposed with the linear steering engines and whose one ends are hinged with output ends of the linear steering engines and middle parts are rotatably connected with the engine body; the swash plate subassembly includes a swash plate and a swash plate rotating shaft sleeved in the swash plate; swash plate support arms are respectively installed in the traverse rolling direction and the pitching direction of the swash plate and are hinged with the other ends of the L-shaped operating arms; the total torque slide bar subassembly includes a central joint bearing disposed at the lower end of a total torque slide bar and a side joint bearing correspondingly disposed at the lower end of a long pull rod; a ball joint of the center joint bearing and the side joint bearing is fixedly connected with the swash plate rotating shaft through a traverse connecting rod. The self-stability and safety of an unmanned helicopter can be improved.

The invention discloses a self-generating environment-friendly fuel gas heating and hot water heater. The fuel gas heating and hot water heater comprises a fuel gas heating and hot water heater body,a coaxial type smoke discharging pipe, a sealing chamber, an inverted U-shaped combustion chamber, a heat exchanger, a circulating water pump, a fan, an expansion water tank, an oxygenerator and a heat absorption and heat dissipation power generation module group. In the using process of the fuel gas heating and hot water heater, a storage battery used by the fuel gas heating and hot water heatercan be automatically charged, so that the service life of the storage battery is prolonged, and the use of a dry battery by a traditional fuel gas heating and hot water heater is effectively reduced,so that the pollution of the dry battery to the environment is greatly reduced; and meanwhile, the concentration of the oxygen in the sealing chamber can be determined, the oxygen can be supplementedto the sealing chamber in real time according to the oxygen concentration, sufficient combustion of the fuel gas is ensured, and generation of poisonous gas such as CO is prevented.

The invention provides a multi-membrane combined double-circulation bioreactor, a multi-membrane combined double-circulation biological treatment system and a low-carbon-nitrogen-ratio organic wastewater treatment method, and belongs to the technical field of wastewater treatment. The multi-membrane combined double-circulation bioreactor is reasonable in structural arrangement and can realize double internal circulation, and when the multi-membrane combined double-circulation biological treatment system based on the multi-membrane combined double-circulation bioreactor is used for treating low-carbon-nitrogen-ratio organic wastewater, a carbon source and a phosphorus removal agent are not added, and an advanced treatment unit is not additionally arranged; meanwhile, under the conditions of low energy consumption and low residual sludge yield, stable and efficient nitrogen and phosphorus removal effects can be realized; in addition, the suspended sludge amount and transmembrane pressure difference in the treatment process can be reduced, the reduction of membrane flux is delayed, the service life and the working period of the membrane are prolonged, and the investment and operation maintenance cost of a treatment system is saved.

The invention relates to a single-frequency laser, in particular to a multi-channel acousto-optic frequency shift module and a single-frequency fiber laser capable of hopping frequency. The multi-channel acousto-optic frequency shift module comprises a light splitting device used for receiving an optical signal and forming at least two paths of light splitting signal output according to the optical signal, an acousto-optic modulation device and a coupling device; the acousto-optic modulation device comprises at least two paths of acousto-optic modulators, the input ends of the acousto-optic modulators are connected with the light splitting device, and the acousto-optic modulation device is used for receiving one path of light splitting signal and processing the light splitting signal to form a processing signal; and the input end of the coupling device is connected with the acousto-optic modulation device, and the coupling device is used for carrying out coupling processing on the processing signal.

The invention relates to the field of decision tree purchase management, and provides a decision tree-based supplier purchase management method and system, and the method comprises the steps: S1, obtaining the index information of enterprise suppliers, and integrating and storing the index information into a database; s2, extracting a sample data set in the database, and constructing a decision tree through the sample data set; s3, compiling an expected index according to the purchasing scheme of the supplier, and obtaining a decision result through the expected index and the decision tree; s4, judging whether the decision result meets a preset requirement or not, if yes, entering the step S5, and if not, outputting prompt early warning information and ending the process; s5, obtaining the sample update quantity of the database, if the sample update quantity reaches a preset threshold value, returning to the step S2 to reconstruct the decision tree, and pruning the current decision tree according to the hit rate set of the historical decision tree; otherwise, returning to the step S3. The decision-making tree can be dynamically refreshed, and the decision-making tree is more and more accurate along with more and more sample data, so that purchase management always keeps high accuracy.

The invention provides a crude oil heating system with a heat storage function. The crude oil heating system comprises a solar collector, a heat medium storage tank and a crude oil heat exchanger. The crude oil heat exchanger comprises a heat exchange unit and a heat storage unit. An outlet of the heat medium storage tank is divided into two paths, one path of the outlet of the heat medium storage tank is connected with an inlet of the solar collector through a pipeline, an outlet of the solar collector is connected with a heat medium inlet of the crude oil heat exchanger through a pipeline, and a heat medium outlet of the crude oil heat exchanger is connected with an inlet of the heat medium storage tank; and the other path of the outlet of the heat medium storage tank is connected with a heat medium inlet of a heat storage unit through a pipeline, and a heat medium outlet of the heat storage unit is connected with the heat medium inlet of the crude oil heat exchanger through a pipeline. The invention further provides a crude oil heating method with the heat storage function. By the adoption of the crude oil heating system, the utilization efficiency of solar heat can be increased, and meanwhile the output stability of the solar heat is improved.

The invention relates to an ozone discharging tube, an ozone discharging chamber and a vertical type ozone generating device. The ozone discharging tube comprises a discharging medium tube and a high voltage electrode rod arranged in the discharging medium tube, wherein the discharging medium tube is a titanium quartz glass tube, a chromium layer is coated on the outer wall of the quartz glass tube, and a spring piece is supported between the discharging medium tube and the high voltage electrode rod so as to form a ring-shaped discharging gap; the ozone discharging chamber comprises an upper honeycomb end plate, a lower honeycomb end plate and a plurality of ozone discharging tubes; and the vertical type ozone generating device comprises an air inlet cavity, an air outlet cavity and the ozone discharging chamber. The vertical type ozone generating device has the advantages of high ozone production efficiency, high operation reliability, simple structure, convenience in assembly and low production cost and can be used for manufacturing a large-scale ozone generator; therefore the industrial production of the vertical type ozone generating device can be realized very easily.

The invention provides an automatic circular wafer rewinding mechanism. The automatic circular wafer rewinding mechanism comprises a rack, a first rewinding portion, a second rewinding portion and a transmission device. The first rewinding portion and the second rewinding portion are oppositely isolated and arranged on the rack, and the transmission device penetrates the first rewinding portion and the second rewinding portion and is configured to transmit a circular wafer. The automatic circular wafer rewinding mechanism solves the defects of manual operation of basket rewinding with the samepitch and the same specification and avoids the problem of the metal pollution generated by the wafer basket of a cleaning area and the wafer basket of a metal area, allows the wafer baskets of the cleaning area and the metal area to be completely isolated, avoids metal pollution of the wafer baskets of the cleaning area and achieves stable and efficient production.

The invention relates to the technical field of batteries, in particular to a vehicle ternary battery pack low-temperature control module which comprises a battery pack control system connected with a vehicle control system, and the vehicle control system is connected with a communication transmission unit and an instrument display unit. The battery pack management and control system comprises a management and control unit, a thermal management control unit, a signal detection unit and a battery monitoring unit, the management and control unit is connected with the thermal management control unit and the battery monitoring unit, and the battery monitoring unit is further connected with the signal detection unit. The condition of the battery pack is divided through the battery detection unit, it is guaranteed that the battery is charged and discharged under the safe condition, then it is guaranteed that the temperature of the battery pack under the low-temperature condition is raised, and it is guaranteed that the battery pack is in stable and efficient output.

The present invention relates to the field of spraying devices, in particular to an automatic large-scale pesticide spraying device and its application, including a gantry for traveling, and the gantry is provided with driving equipment for driving it to advance during the spraying process; A spraying mechanism for spraying pesticides on tobacco plants in a large range. The spraying mechanism is set on the gantry; A filtering mechanism for purifying and filtering the liquid medicine, the filtering mechanism is in transmission connection with an adjustable-speed driving mechanism, and the filtering mechanism is respectively connected with the spraying mechanism and the medicine storage box through pipelines. This kind of automatic large-scale spraying device realizes the spraying management of crops in a large area, solves the defect of poor spraying effect of the current spraying device, and the filtering mechanism can also filter and purify the liquid medicine and play a stirring role.

The invention discloses HDPE plastic pipe forming equipment and relates to the technical field of pipeline processing. The HDPE plastic pipe forming equipment comprises a machine barrel, a heating clamping sleeve I, a heating clamping sleeve II, a heating clamping sleeve III, an extrusion die and a guide device. The machine barrel is provided with a feed inlet. The heating clamping sleeve I, the heating clamping sleeve II and the heating clamping sleeve III are installed outside the machine barrel. The machine barrel is divided into a preheating section, a heating section and an insulation section. Temperatures of the heating clamping sleeve I, the heating clamping sleeve II and the heating clamping sleeve III are all controlled by independent temperature control devices and heat sources,and thus the temperatures of the preheating section, the heating section and the insulation section are all different. An end outlet of the machine barrel is connected with the extrusion die through aconnection pipe. The HDPE plastic pipe forming equipment has the beneficial effects that plastifying banburying is conducted on raw materials through two screws, the plastifying banburying effect isensured through step-type heating temperatures, when the material temperature does not reach the set threshold value, the raw materials can enter the machine barrel again to be plastified through switching of a valve, and thus quality of finished products is ensured.

The invention discloses a method for setting parameters of an LCCL‑LC wireless power transmission system. The method selects suitable transmitting and receiving coils according to the requirements of transmission power, and calculates the ratio of the inductance by determining the relationship between the inductance of the primary transmitting coil and the resonant inductance Specific value, so as to determine the value of resonant inductance, through the circuit resonance relationship, determine other compensation capacitors. The present invention has the effect of quickly and accurately determining the parameters of the LCCL-LC wireless power system. The LCCL-LC system designed by the method has the advantages of constant voltage output, high transmission efficiency, and stable and efficient work within the full load range; through this method, it can be based on the actual The transmission power needs to quickly design system parameters to meet the needs of engineering applications.

The invention discloses an automatic medicine plate feeding device which comprises a push rod and a push structure which are combined together. According to the automatic medicine plate feeding device, a medicine plate is automatically dropped down under the action of gravity, the push rod is driven by the push mechanism to make horizontal reciprocation movement along the bottom of a medicine plate tank, furthermore medicine plates on a lowest layer of the medicine plate tank to an appointed position, and then automatic conveying of the medicine plates is achieved; the packaging machine is simple in structure, stable in operation and low in maintenance cost, medicine plates can be efficiently and stably output, the working efficiency is greatly improved, the device is applicable to medicine plates of different specifications, the applicability of the packaging machine is improved, and very high popularization values can be made.

The invention discloses a rotor system of an unmanned aerial vehicle. The UAV rotor system comprises a helicopter rotor wing control device and a seesaw type rotor wing. The helicopter rotor wing control device comprises an inclined disc assembly and a total-moment sliding rod assembly; the inclined disc assembly comprises an inclined disc, a rotor wing shaft is tubular, a total-moment sliding rodand a long pull rod penetrate through the rotor wing shaft, and the upper end is in corresponding transmission connection with a propeller clamp assembly. A steering engine driving assembly, the inclined disc assembly and the total-moment sliding rod assembly are in modular design, so the structural complexity is reduced, and operation such as design, debugging and maintenance of the rotor systemis simplified. Three linear steering engines of the steering engine driving assembly of the rotor wing control system are used in parallel, the space utilization rate is increased, and the structuralcomposition is simplified.

The invention discloses a pneumatic motor side polishing base. The base comprises a mounting base, a first baffle, a second baffle, a first rotary clamping part, a second rotary clamping part and a driving part; the first baffle is arranged at one end of the mounting base; the second baffle is arranged at the other end of the mounting base; the first rotary clamping part is arranged on the first baffle; the second rotary clamping part is arranged on the second baffle; the first rotary clamping part and the second rotary clamping part are oppositely arranged; and the driving part is connected with the second rotary clamping part and drives the second rotary clamping part to rotate. The pneumatic motor side polishing base is reasonable in structure, good in polishing appearance effect, stable in surface removing amount, high in production efficiency and high in yield.