42results about How to "Realize passive control" patented technology

The invention aims at providing a turbine with moving blades with pits at blade tops. The turbine comprises a case and a hub. The moving blades are uniformly installed along the circumferential direction of the hub. The hub and the moving blades are installed in the case. The pits are arranged at the blade tops of the moving blades. By designing the turbine blades with the pits at the blade tops, on one hand, the clearance leakage amount is reduced, the turbine efficiency is improved and the attack angle change applicability is good; on the other hand, the heat load on the surfaces of the blade tops and the heat transfer coefficient of local areas of the blade tops are reduced, the non-uniform extent of heat transfer of the blade tops is reduced and the service life of the blades is improved; the weight of the ends of the blade tops can be reduced, the rigidity produced when the blades rub the case is reduced and the working reliability of the gas turbine is improved.

The invention provides an automatic regulating device for spray lance balance. The automatic regulating device comprises a DC step motor, a fixing frame, a slide rail, a slider, a folding hydraulic cylinder, a height regulating rack, a height regulating hydraulic cylinder, a spray lance unit, a rotary shaft, a large gear, a small gear, a guide pulley, a guide pulley shaft, a distance measurer and a controller. When a sprayer operates, the distance measurer measures signals of distances from two ends of the spray lance to the crop canopy; the signals are sent to the controller; the controller controls the DC step motor to drive the spray lance so as to regulate the balance of the spray lance. The automatic regulating device allows vertical plane motion of the spray lance to be effectively controlled and horizontal plane motion of the spray lance to be effectively reduced; the automatic regulating device is suitable for slope operations and helps improve spray deposition uniformity.

The invention provides an intelligent running machine which comprises a runway platform, a motor for driving the runway platform to rotate, two supporting rods connected with the runway platform and extending towards the upper portion of the runway platform, and handrails. The tops of the two supporting rods are provided with an operation platform, and the handrails are connected with the operation platform. The operation platform is provided with an operation panel and a tablet personal computer. Accordingly, the heart rate is combined with the time, hang time, distance, speed and the like of a runner. Through gait tracking, the running posture and movement of the trainee are analyzed, and effective help is provided for scientific training. Real-time detection results are fed back to a control module, and the control module can adjust the speed of the running machine in real time, so that passive control over the running machine in the prior art is changed to be active control over the speed.

The invention discloses a stator permanent-magnet thin-type bearingless switch reluctance machine. The stator permanent-magnet thin-type bearingless switch reluctance machine comprises a stator and arotor, wherein rotor teeth are arranged at an edge part of the rotor, the stator comprises a stator core, first magnetic conduction bridges, permanent magnets and a second magnetic conduction bridge,the stator core is in an annular shape, a plurality of suspension teeth are uniformly arranged at an inner ring of the stator core, a plurality of torque teeth are uniformly arranged at the inner ringof the stator core between two adjacent suspension teeth, a suspension winding and a torque winding are respectively wound around the suspension teeth and the torque teeth, the rotor is coaxially arranged in an inner cavity of the stator core, the stator teeth, the suspension teeth and the torque teeth are arranged at intervals to form a radial working gap, a central hole is coaxially formed in the rotor, the second magnetic conduction bridge comprises a central post and a plurality of magnetic conduction arms, the plurality of magnetic conduction arms are uniformly arranged on the same circumference of the central post, each magnetic conduction arm is connected with the first magnetic conduction bridge by the permanent magnet, the first magnetic conduction bridges are attached onto the stator core, the central post is inserted into the central hole, and the central post and the central hole are arranged at intervals to form a central working air gap.

The invention discloses a hybrid reluctance type magnetically levitated linear motor with axial biased magnetic flux. An upper stator comprises a suspended iron core with an inverted U-shaped front-view projection and M-shaped left-side-view projection and right-side-view projection; suspended windings are wound on three vertical teeth of M-shaped structures on the left and right sides; an axiallymagnetized permanent magnet with opposite magnetic poles is interposed between the adjacent vertical teeth; a control iron core with an inverted U-shaped front-view projection and M-shaped left-side-view projection and right-side-view projection is arranged between two vertical rods of the front-view projection of the suspended iron core; and axial control windings are wound on the three verticalteeth of the M-shaped structures on the left side and right side. According to the hybrid reluctance type magnetically levitated linear motor with the axial biased magnetic flux provided by the invention, the magnetic resistance generated by electrifying the axial control windings in turn is used for realizing the axial linear movement of a rotor; the suspension control and the axial motion control are completely independent, thus the control is simple and the implementation is easy; and when the rotor is in a balance position, stable suspension of the rotor is achieved through the biased magnetic flux, and the power consumption is extremely low.

The invention provides a data sharing system for running machines for rehabilitation. Each running machine for rehabilitation comprises a rehabilitation platform and two bracing rods connected with the rehabilitation platform; an operating platform is arranged on the tops of the bracing rods, horizontal armrests connected with the operating platform are arranged, a vertical armrest is arranged to be connected with the corresponding horizontal armrest in a bent mode, and the bottom end of each vertical armrest is fixed at the tail end of the rehabilitation platform; a protection band is arranged on the horizontal armrests, the two ends of the protection band are connected with the horizontal armrests on the two sides of the rehabilitation platform respectively, the front end of the rehabilitation platform is provided with an elastic cushion, the bottom of the front end of the rehabilitation platform is provided with fixing parts, the upper end of each fixing part is connected with the bottom end of the corresponding bracing rod, a fixing rod is connected to the horizontal end of each fixing part, and the bottom end of each fixing rod is provided with a rubber type suction cup. A tablet personal computer judges the current rehabilitation state of a convalescent patient according to data sent by a joint motion data acquisition module and an electromyography data acquisition module and displays the rehabilitation state of joints and muscles on a touch screen, and the convalescent patient can know the physical state of his/her own more visually.

Disclosed is a beam end controllable energy dissipation plastic hinge. The beam end controllable energy dissipation plastic hinge comprises a mechanical hinge; disc spring self-resetting devices are arranged on the inner sides of the upper end and the lower end of the mechanical hinge; and friction energy dissipation devices are arranged on the front end face and the rear end face of the mechanical hinge. The structure can be induced to form a reasonable damage mechanism under the earthquake action, the anti-seismic performance of a fabricated concrete frame structure is improved, passive control over the structure under the earthquake action is achieved, the purpose that the structure function can be recovered is achieved, and rapid development of the fabricated concrete frame structure is promoted.

The invention relates to a refrigerating system cooling capacity control method and device, a controller and a refrigerating system. The refrigerating system cooling capacity control method comprises the steps of obtaining the total cooling capacity of the refrigerating system; determining the target cooling capacity of each refrigerating host in the refrigerating system; determining a flow value of each refrigerating host according to the target cooling capacity of each refrigerating host; and according to the flow value of the refrigerating host, adjusting the frequency of a water pump corresponding to the refrigerating host, so that the actual cooling capacity of the refrigerating host can reach the target cooling capacity. The control method adopts a principle that according to the optimal energy efficiency of the refrigerating host, the frequency of the water pump corresponding to different refrigerating hosts is adjusted. Passive control over the cooling capacity of a single refrigerating host is achieved, so that the refrigerating system can accurately control cooling capacity output matching of different refrigerating hosts, and the overall energy efficiency of the refrigerating system reaches the highest.

The invention provides self-powered hydrogen gas processing equipment. The self-powered hydrogen gas processing equipment comprises a heat-power conversion device, a catalytic compounding device, a high-voltage power supply generation circuit and a hydrogen gas ignition device, wherein the heat-power conversion device is provided with a low-temperature side and a high-temperature side, and a containing chamber is defined between the low-temperature side and the high-temperature side; a heat-power conversion module is arranged in the containing chamber; the catalytic compounding device is used for catalyzing hydrogen gas and oxygen gas flowing through the device so as to be subjected to compounding reaction to generate water and heat; the catalytic compounding device generating the heat is arranged at the high-temperature side and is used as a heat source; the high-voltage power supply generation circuit is electrically connected with the heat-power conversion device and is used for converting low voltage generated by the heat-power conversion device to high voltage; high-voltage power generated by the high-voltage power supply generation circuit is supplied to the hydrogen gas ignition device for carrying out hydrogen gas ignition. The invention provides the nuclear power station containment with the self-powered hydrogen gas processing equipment. With the adoption of the technical scheme provided by invention, the independence of the hydrogen gas processing equipment on an external power supply under an accident condition can be solved and the passive control on hydrogen gas risks in the containment is realized.

The invention provides a rehabilitation walking machine which comprises a rehabilitation platform and two supporting rods connected with the rehabilitation platform. An operating platform is arranged at the top of the two supporting rods; horizontal armrests connected with the operating platform and vertical armrests in bent connection with the horizontal armrests are arranged, and the bottom ends of the vertical armrests are fixed to the tail end of the rehabilitation platform. The horizontal armrests are provided with protective strips, the two ends of the protective strips are connected with the horizontal armrests on the two sides of the rehabilitation platform respectively, the front end of the rehabilitation platform is provided with an elastic cushion, the bottom of the front end of the rehabilitation platform is provided with a fixed part, the upper end of the fixed part is connected with the bottom ends of the supporting rods, the horizontal end of the fixed part is connected with a fixed rod, the bottom end of the fixed rod is provided with a glue sucker. The fixed rod is in inserted connection with a movable rod, and the fixed rod is fixedly locked with the movable rod through a plug pin. A convalescent patient stands on the rehabilitation platform, and the protective strips are wound around the waist; when buckles are buckled, both hands can be supported through the horizontal armrests; during the running of the rehabilitation platform, the convalescent patient slowly walks to achieve the effect of exercising lower limbs.

The invention discloses a CO2 trapping device, a CO2 conversion device and a carbon trapping split type air conditioning system. The CO2 trapping device comprises a box body, a fan and at least one CO2 catcher, wherein the fan and the at least one CO2 catcher are respectively arranged in the box body; the fan is used for sucking indoor air into the box body, so that the indoor air flows through the CO2 catcher; the CO2 catcher comprises at least one CO2 adsorption plate used for adsorbing CO2 in air flowing through the CO2 catcher and a heating piece used for heating the CO2 adsorption plate so that the CO2 adsorption plate can release the adsorbed CO2. According to the CO2 trapping device, passive control over CO2 in indoor air can be achieved, the indoor air quality is improved, meanwhile, the ventilation rate is reduced, and human health is facilitated.

The invention discloses a double sheet type five-degree-of-freedom bearing-free switched reluctance motor. The motor comprises a stator and a rotor, wherein the rotor consists of a rotating shaft androtor cores, rotor teeth are arranged on the edges of the rotor cores, the two rotor cores are arranged in parallel at an interval, the stator comprises two annular stator cores, four suspension teethare uniformly arranged on the inner ring of each stator core, a plurality of torque teeth are uniformly arranged on the inner ring, between two adjacent suspension teeth, of each stator core, and suspension windings and torque windings wind around the suspension teeth and the torque teeth respectively; outer rings of the two stator cores are uniformly connected with a plurality of magnetic conductive bridges, and the magnetic conductive bridges connected to the two stator cores are connected through permanent magnets in a one-to-one correspondence manner; the two rotor cores are coaxially arranged in inner cavities of the two stator cores respectively, and the rotor teeth of each rotor core and the suspension teeth and torque teeth of the corresponding stator core are spaced to form radial work air gaps.

A labyrinth seal (25,...,27), for sealing the annular interspace (11) between the rotor (12) and the stator (10) of a steam turbine or gas turbine, comprises a multiplicity of sealing strips (13) which are arranged in series in the axial direction, are fastened on the stator (10) and project into the interspace (11), which sealing strips interact, with sealing effect, with rotor-side sealing elements (14, 19) which are arranged in a staggered manner. With such a labyrinth seal (25,...,27), an improved sealing effect is achieved by the sealing strips (13) in the cold installed state being offset in relation to a symmetrical position, wherein the offset has the reverse direction and the same amount as the distance (29) by which the sealing strip (13) is displaced relative to adjacent rotor-side sealing elements (14, 19) as a result of thermal expansions of the stationary and rotating components and support structure when being heated from the cold installed state to a hot steady-state operating condition.

The invention discloses an air inlet ring assembly. The air inlet ring assembly comprises an air inlet ring with an axis and a pre-rotating device. The air inlet ring comprises a radial extending partand an axial flow guide part, wherein the radial extending part is annular around the axis, and the axial flow guide part is located on the radial inner side of the radial extending part and extendsalong the axis. The air inlet ring assembly is characterized in that the pre-rotating device comprises a first-stage pre-rotating mechanism, the first-stage pre-rotating mechanism is arranged on the first side, in the axial direction, of the radial extending part, the axial flow guide part is arranged on the second side, opposite to the first side, of the radial extending part in the axial direction, the first-stage pre-rotating mechanism comprises a first-stage shifting piece which is pushed by the pressure difference of the two sides, in the axial direction, of the radial extending part to rotate, and a rotating shaft of the first-stage shifting piece is parallel to the axis. The invention further discloses a fan system with the air inlet ring assembly and an extractor hood with the fansystem.

The invention discloses an exhaust-free two-way enhanced filtering method for a house. The exhaust-free two-way enhanced filtering method is characterized in that a two-way enhanced filtering system combining outdoor fresh air filtration and indoor return air filtration is adopted, the indoor micro-positive pressure is maintained by utilizing an exhaust-free internal circulation filtration technology, and therefore outdoor haze can be prevented from being infiltrated, and the rapid response to the heavy haze can be further realized. The invention discloses an exhaust-free double enhanced filtering system for the house, and the exhaust-free double enhanced filtering system for the house comprises an outdoor fresh air inlet pipe (1), an outdoor fresh air filter (2), an air-air heat exchanger(3), an indoor return air filter (4), an indoor return air inlet pipe (5), an indoor return air supply pipe (6), an indoor return air fan (7), a PM2.5 concentration sensor (8), an indoor return air fan controller (9), an outdoor fresh air fan (10), an outdoor fresh air supply pipe (11) and a composite installation box (12). According to the exhaust-free two-way enhanced filtering method and system for the house, the rapid response to the heavy haze can be realized, and the excellent indoor air quality can be effectively guaranteed.

The invention discloses a five degree-of-freedom bearingless switch reluctance motor. The five degree-of-freedom bearingless switch reluctance motor comprises a common stator and a common rotor; the common rotor is composed of a laminar motor rotor iron core and a laminar magnetic bearing rotor iron core which are connected to a rotating shaft, and rotor tooth is arranged on the circumference of the motor rotor iron core; the common stator comprises a laminar motor stator iron core and a laminar magnetic bearing stator iron core which are arranged at the radial outsides of the motor rotor ironcore and the magnetic bearing rotor iron core at intervals; suspending teeth is respectively arranged at the inner circumference of the motor stator iron core and the magnetic bearing stator iron core, a suspending winding is wound on the suspending tooth, and the torque tooth is further arranged between the adjacent motor suspending teeth; the suspension tooth is longer than the torque tooth, atorque winding is wound on the torque tooth, the outer circumferences of the motor stator iron core and the magnetic bearing stator iron core are respectively connected with a motor magnetic-conductive bridge and a magnetic bearing magnetic-conductive bridge corresponding to the motor suspending tooth and the magnetic bearing suspending tooth, and the motor magnetic-conductive bridge and the magnetic bearing magnetic-conductive bridge are connected in one-to-one corresponding way through a permanent magnet block.

The invention discloses a PI passive control method and system of a modular multilevel converter. The PI passive control method comprises the steps of: establishing a bridge arm average model based on a controlled source, and listing a differential equation represented by sigma-delta in a corresponding abc coordinate system; deducing a state space model of the MMC bridge arm average model according to the established differential equation; establishing a port controlled dissipation Hamilton model of an MMC system by using the state space model of the MMC bridge arm average model; utilizing the port controlled dissipation Hamilton model of the MMC system and utilizing a passive control theory to design a PI passive feedback controller of a closed-loop system, and realizing control over the modular multilevel converter through using the PI passive feedback controller. According to the PI passive control method, effective tracking of the expected trajectory of the MMC system can be realized, and the global asymptotic stability of the system can be ensured according to the Lyapunov stability theory, so that the robustness of the system is improved.

The invention discloses an outer-rotor five-degree-of-freedom non-bearing switch reluctance motor. The motor comprises a shared inner stator and a shared outer rotor, the shared inner stator is composed of a left stator iron core, a permanent magnet ring and a right stator iron core which are in serial connection with a magnetic insulation shaft in sequence, four suspension teeth are arranged at the edge of the left stator iron core in the x and y directions, and four suspension teeth are arranged at the edge of the right stator iron core in the x and y directions; multiple torque teeth are further connected between every two adjacent suspension teeth through magnetic insulation blocks, and suspension windings and torque windings wind the suspension teeth and the torque teeth respectively;the shared outer rotor is composed of a left rotor iron core and a right rotor iron core which are fixedly connected to a magnetic conduction shell, the left rotor iron core and the right rotor ironcore are coaxially arranged at the radial outer sides of the left stator iron core and the right stator iron core at intervals respectively, and multiple rotor teeth are arranged on the inner circumferences of both the left rotor iron core and the right rotor iron core.