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 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 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 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.

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.