41results about How to "Rectification" patented technology

The invention discloses an energy feedback type magnetorheological fluid energy absorber. The energy feedback type magnetorheological fluid energy absorber is characterized in that the energy feedback type magnetorheological fluid energy absorber is composed of a controllable damping force mechanism, an energy feedback mechanism and a self-adaption power supply circuit; the controllable damping force mechanism is formed by coaxially assembling an excitation shell and a movement conversion mechanism, wherein the movement conversion mechanism comprises a conversion mechanism sleeve, a ball screw, an excitation rotor and a thrust bearing; the excitation shell is connected with an upper end cover and an energy feedback mechanism shell to form a closed space full filled with magnetorheological fluid; according to the energy feedback mechanism, in the energy feedback mechanism shell, an engine is formed by coaxially assembling an engine upper sleeve and an engine lower sleeve, and an engine is driven through a rotating connection sleeve so that energy feedback can be achieved; and electric connection of the self-adaption power supply circuit is achieved between the energy feedback output end of the energy feedback mechanism and the power supply input end of the controllable damping force mechanism. By means of the energy feedback type magnetorheological fluid energy absorber, efficient utilization of the magnetorheological fluid is achieved, and the self-adaption power supply function of the magnetorheological fluid energy absorber is achieved.

The present invention discloses an exhibit microenvironment monitoring system. The system comprises a frequency collection circuit, a separation calibration circuit and a frequency selection output circuit. The frequency collection circuit is configured to collect simulation signals of an input end of a signal transmission channel in a control terminal of the exhibit microenvironment monitoring system, the separation calibration circuit utilizes a variable resistor RW1, a variable resistor RW2, a capacitor C3 and a capacitor C4 to divide the output signals of the frequency collection circuit into two paths of signals, the frequency selection output circuit utilizes resistors R19-R21 and capacitors C13-C15 to form a frequency selection circuit to screen out signals with a single frequency for output so as to achieve real-time detection of the signal condition of the signal transmission channel in the control terminal in the exhibit microenvironment monitoring system and convert the signal frequencies to the compensation signals of the simulation signals of the input end of the signal transmission channel in the exhibit microenvironment monitoring system.

The invention relates to a rectifier circuit, comprising two inductors L1 and L2, a first switch element Q1, a second switch element Q2, a third switch element Q3, three diodes D3, D4 and D5, and two capacitors DC1 and C2, wherein one end of the inductor L1 is connected with a fire wire and the other end thereof is connected with the cathode of the diode D3, one end of the capacitor DC1 and one end of the third switch element Q3 simultaneously by the first switch element Q2; the other end of the inductor L1 is connected with the anode of the diode D4, the other end of the capacitor DC1 and the anode of the diode D5 simultaneously by the second switch element; the anode of the diode D3 and the cathode of the diode D4 are connected with the zero line simultaneously; the cathode of the diode D5 is connected with the other end of the third switch element Q3; furthermore, the inductor L2 is connected in series with the capacitor C2 and is then connected in parallel to the diode D5. The rectifier circuit can greatly reduce the harmonic current and improve the circuit power factor; furthermore, compared with the output voltage, the input voltage can be output in a reducing or boosting way.

The invention relates to a right-angle high-pressure electromagnetic flow meter which comprises a flow meter shell, a sealing end cap connected with the flow meter shell, a connection base and an electromagnetic flow converter. A metering cavity is arranged in the flow meter shell, and the connection base is respectively connected with the sealing end cap and the electromagnetic flow converter. The flow meter is characterized in that an electromagnetic flow sensor is further included and is located in the metering cavity, the electromagnetic flow sensor comprises a sensor shell, a measurement electrode, an excitation coil and a magnetic yoke, the measurement electrode is embedded into the outer wall of the sensor shell, the excitation coil and the magnetic yoke are located on the inner wall of the sensor shell, and the excitation coil and the magnetic yoke are connected with the electromagnetic flow converter through cables. The right-angle high-pressure electromagnetic flow meter has the advantages that the Faraday electromagnetic induction principle is adopted, the induction signal amplitude and the fluid flow speed are in direct proportion, the structure is simple, movable components do not exist, the service life is long, maintenance load is little, linear flow measurement is achieved, non-linear revision is not needed, measurement precision is high and the flow range is wide.

The invention discloses a mechanical rectification type friction nanometer power generation device which comprises a friction power generation assembly and a mechanical rectification assembly. The friction power generation assembly comprises a friction electrode assembly and a friction material which can rotate relatively; the mechanical rectification assembly comprises a commutation electrode assembly and an electric brush assembly which can rotate relatively, and the electric brush assembly abuts against the commutation electrode assembly. The reversing electrode assembly and the friction electrode assembly are annularly arranged, the reversing electrode assembly and the friction electrode assembly are relatively fixed, the commutation electrode assembly is electrically connected with the friction electrode assembly, and when the friction electrode assembly and the friction material rotate relatively, the commutation electrode assembly and the electric brush assembly rotate relatively at the same time. The friction electrode assembly and the friction material generate power through friction, and the electric brush assembly can output electric energy outwards. According to the mechanical rectification type friction nanometer power generation device, alternating current to direct current conversion is achieved without an external electrical rectification module, the power dissipation caused by the external electrical rectification module is avoided, and the energy conversion efficiency is high.

The invention provides a fin-type self-rotating anti-eccentric sucker rod capable of preventing abrasion to a rod and a pipe and pump clamping and prolonging the maintenance-free period of an oil and gas well. A three body and one rod structure is adopted for the first time, an oval spherical face is adopted for a rectifying body, and well liquid on the rod body can be rectified; a thrust body and the lower end step face of a turbine body form four oil wedges, and the oil wedges make friction with the well liquid to generate dynamic pressure thrust so that a fin type impeller gear can be driven to perform autorotation; converging type oil wedges are formed between the shaft body of a base rod and an oil pipe column, between the oval spherical face of the rectifying body and the oil pipe column, between the thrust body and the oil pipe column, between the conical surface of the turbine body and the oil pipe column and between a conical gear sleeve and the oil pipe column, dynamic pressure liquid films are generated, and it is guaranteed that the rod and the pipe are totally separated; the dynamic pressure liquid films on the inner layer and the outer layer of the conical gear sleeve of the turbine body form two layers of liquid films, separation between the rod and the pipe is facilitated further, and abrasion is avoided; a rod slips and a slips have the self-lubricating function, meanwhile, the liquid films generated between a slips liner and the oil wedges of the base rod can separate the turbine body and the base rod, and thus abrasion is avoided; the thrust body is rotated to stir well liquid, the flowing speed of the well liquid is increased in combination with the supercharging turbine body, and pump burying and pump blocking caused by sedimentation of sand particles can be prevented.

The invention discloses a four-quadrant explosion-proof frequency converter with a reactive compensation function. The frequency converter comprises an AC filtering unit, a controllable rectificationpower supply, a DC filtering unit, an inversion unit, a rectification controller and an inversion controller. The input end of the inversion unit is connected to the output end of the controllable rectification unit; the output end of the inversion unit is connected to a motor load, the rectification controller controls IGBTs in the controllable rectification unit to achieve rectification and reactive compensation, and the inversion controller controls the IGBTs in the inversion unit to achieve variable frequency speed regulation of the motor load. According to the frequency converter and thecontrol method, four-quadrant operation of rectification, inversion, inductive reactive power and capacitive reactive power in the true sense is achieved, the working conditions of load electric operation and feedback operation can be met, reactive power compensation can be considered, the problem of electric energy quality caused by reactive power can be solved while a motor load is dragged to operate normally, and the utilization rate of equipment is greatly increased.

The invention discloses a water-cooling textile air conditioning system. The water-cooling textile air conditioning system is composed of an air inlet chamber, a pressurizing chamber, an exchange chamber, a pressure reducing chamber and a balance chamber which are sequentially arranged; the air inlet chamber mixes workshop full return air with fresh air and then sends the mixed air into the pressurizing chamber; the pressurizing chamber pressurizes the mixed air by controlling an air outflow amount, tames air flow and sends the air flow into the exchange chamber; the exchange chamber conductsspraying washing and vaporization through spraying water; dirty, hot and dry air in a workshop is subjected to cleaning, cooling and wet washing and exchange and then is fed into the pressure reducingchamber; the air subjected to pressure reduction through the pressure reducing chamber enters the balance chamber; and finally the balance chamber evenly feeds constant-temperature and constant-humidity clean air into a needed working area. A dust removal fan commonly used by a traditional textile air conditioner is omitted, air return and dust removal are completed in the same system, workshop flying catkin and dust are effectively filtered, workshop air flowing is also increased, the workshop air exchange frequency can be reduced, and the purpose of saving energy is achieved while constanttemperature and humidification are achieved.

The invention provides a low-noise rotor-stator fan system, and belongs to the technical field of impeller machinery design. A motor, a stator fan assembly and a rotor fan assembly are sequentially arranged from back to front; the motor is fixedly connected to the rear face of a base of the stator fan assembly; an output shaft of the motor penetrates through a center hole of the base in the statorfan assembly and is fixedly connected with a center hole II of a coupling shaft in the rotor fan assembly B; the rear face of a support plate with a hole in a support is fixedly connected to the front face of an outer ring I in the stator fan assembly through a bolt; and the rotor fan assembly is located in a duct ring of the support. According to the low-noise rotor-stator fan system, a front edge and a tail edge wave sawtooth structure are designed on a stator fan, a bionic turbulent flow structure is designed on the front edge of a rotor fan, an inner sawtooth structure is designed on thetail edge of the rotor fan, and therefore the purpose of reducing rotor-stator interference noise of the rotor-stator fan system is achieved, the cooling efficiency of a large engineering vehicle heatdissipation system is improved, the rotor-stator interference noise is effectively reduced, and the purposes of saving energy and reducing noise are achieved.

The application discloses a FET-based rectifier circuit which includes an energy storage load and a plurality of voltage rectification units. Each voltage rectification unit includes a first output end and a second output end. The energy storage load is connected in series between the first output end and the second output end of each voltage rectification unit and is configured to be charged anddischarged. Each voltage rectification unit includes a first inverter, a second inverter, a first field-effect transistor, and a second field-effect transistor, and is configured to rectify an input voltage signal. Because the field-effect transistors rectify the input voltage signal instead of rectifier diodes, the electric power consumed by the rectifier circuit is reduced, the heat generation is reduced, and integration can be achieved to reduce the occupied area of the circuit.

A volumetric-flow measuring apparatus (1) is provided using a measuring funnel (4) and a flow straightener (6) from a foldable material, which is disposed in the measuring funnel (4), configured such that the measuring funnel (4) and the flow straightener (6) are convertible between a folded-up transport position and an unfolded use position.

The invention relates to a brand-new circuit topology, particularly relates to a chained double-bridge self-coupled stepdown topology, and aims at solving the disadvantage that the traditional stepdown DC converters are low in output power, large in volume, low in efficiency and low in reliability. According to the technology of the chained double-bridge self-coupled stepdown topology, two tubes are used for staggered driving, so that the output power can be enhanced by one time. The high-frequency transformers are designed into a coupling-free chained structure, so that the energy loss of coupling conversion is eliminated and the efficiency is improved. According to the chained double-bridge self-coupled stepdown topology, the stepdown power supplies can be provided with the following advantages under the requirement for same power and electric parameter: the volume is decreased by 50%, the output power is improved by one time, the efficiency is improved by 10% and the efficiency can be up to 96%.

The invention relates to a water supply and condensation water cooperative system of a direct air cooling unit based on a double-fed system. The water supply and condensation water cooperative system comprises an air cooling island, a water supply pump, a condensation water pump, a double-frequency double-fed generator, a cooperative driving steam turbine and the like. According to the water supply and condensation water cooperative system, the cooperative driving steam turbine and the double-frequency double-fed generator are additionally arranged, the double-frequency double-fed generator can output currents with two frequencies at the same time, and after the driving power consumption of the water supply pump and the condensation water pump is met, redundant electric energy is conveyed to a factory power grid at 50 Hz. Under the variable working condition of the unit, the rotating speed of the water supply pump and the rotating speed of the condensation water pump are increased and decreased at the same time, the variable-frequency current output by the double-frequency double-fed generator can be subjected to cooperative driving adjustment according to the operation requirements of the water supply pump and the condensation water pump, and the rotating speed of the pumps is changed so as to change the operation working condition points of the pumps. According to the water supply and condensation water cooperative system of the direct air cooling unit based on the double-fed system, the operation requirements of the water supply and condensation water system can be met, the adjusting efficiency and the adjusting safety of the direct air cooling unit under the high-frequency and wide-load application scene in the future are improved, and the energy-saving potential is huge.