412results about How to "Extend mechanical life" patented technology

The invention relates to a yaw control method for a large-sized wind powered generator unit. A current yaw angle reference value alpha reference is obtained according to a current wind direction, a current yaw angle practical value alpha practice is obtained by a encoder or a tachometer, a yaw angular error delta alpha is obtained by subtracting the yaw angle practical value alpha practice by the current yaw angle reference value alpha reference, and a corresponding yaw mechanism control rule is calculated by integrating the yaw angular error delta alpha and the variation tendency thereof by a fuzzy controller. Furthermore, an obtained electrical signal of the yaw mechanism control rule is sent to a yaw actuating mechanism to control a propeller pitch angle, and the yaw angle of the wind powered generator unit traces the yaw angle reference value alpha reference to enable the yaw angle practical value alpha practice and the yaw angle reference value alpha reference of the wind powered generator unit to be kept consistent. The invention obviously enhances the total precision, is favorable to increasing the year total generated energy of the wind powered generator unit, has high adaptability for complex and extreme cases, greatly enhances the operating effectiveness, furthest prolongs the mechanical life of the yaw actuating mechanism, and also has low remodel difficulty and low cost.

The invention discloses an intelligent control module of a permanent magnet contactor, which mainly comprises a microprocessor, a rectifier and filter, an internal working power circuit, a rechargeable battery control circuit, a closing operation module, an opening operation module, an energy-storage capacitor voltage detection circuit, a control voltage detection circuit, a power off detection circuit, and a key-press setting and display control circuit; wherein, the closing operation module consists of a first MOSFET driving protection circuit and a first MOSFET; and the opening operation module consists of a second MOSFET driving protection circuit and a second MOSFET. The intelligent control module can set delay time parameters of transient interference electricity through key-presses according to requirements of a customer, realizes delay disconnection of the permanent magnet contactor and can ensure the stable and continuous operation of equipment through staying away from influences of interference electricity; and as for conditions of requiring urgent opening operation, the intelligent control module can immediately cut off the contactor through key-press control, so as to ensure the safety of the operating equipment.

The invention discloses a preparation method of a high-strength and antioxidant rare-earth-based smoke denitration catalyst. The preparation method of the high-strength and antioxidant rare-earth-based smoke denitration catalyst comprises the following steps: by taking titanium dioxide and montmorillonite as carriers and ammonium metatungstate, cerous nitrate and lanthanum nitrate as active components, mixing, ageing, kneading, forming, drying and roasting with the accompanying of auxiliary materials. The auxiliary materials comprise ammonia water, lactic acid, citric acid, stearic acid, glass fiber, wood pulp, hydroxypropyl methyl cellulose, polyoxyethylene, monoethanolamine and water. The product prepared by the method is separated under a high SO2 smoke condition, nitric oxide in the smoke can be decomposed; meanwhile, the purpose of removing mercury and dioxin can be achieved. According to the preparation method of the high-strength and antioxidant rare-earth-based smoke denitration catalyst, the rare earth elements, namely cerium and lanthanum are used as the active components, so that the addition amount of vanadium is reduced, the toxicity of the product is reduced or the product is non-toxic product, the pressure of the post treatment of the product is reduced; the environmental protection pressure is reduced; the product is environmentally friendly; the product can be widely used in the field of thermal power plants, glass factories and chemical plants.

The invention discloses a flexible Rogowski coil used for detecting the direct-current system short-circuit current and a method for designing the same, the coil comprises a coil and a loop uniformly wound around an annular flexible framework with an opening, an outer layer insulating bush is sleeved outside the coil and the loop, a plug-type interface attached to the coil and the loop is installed on the opening of the annular flexible framework, the coil outgoing line is connected with a sampling resistance module after being educed through the hole of the plug-type interface, the sampling resistance module educes a signal and is connected with a post-integrating circuit. In the Rogowski coil loop winding technique adopted in the invention, the return wire and the coil winding are constituted by one wire. The head end and the tip end of the Rogowski coil are connected by the plug-type interface, which can improve the mechanical life of the Rogowski coil to a great extent, has the advantages of high reliability and convenience for disassembly and installation; the method for designing the Rogowski coil used for detecting the direct-current system short-circuit current can combine the short circuit physical circumstances and the field working condition of the direct-current system.

The invention provides a propeller pitch variation control method for a large-sized wind powered generator unit. The method comprises the following steps: a rotating speed error delta omega is obtained by subtracting the practical rotating speed omega practice of a current main bearing by the rotating speed expected value omega expectation of the current main bearing, a corresponding propeller pitch angle reference value beta reference is calculated by integrating a rotating speed difference delta omega and the variation tendency by a fuzzy controller, the propeller pitch angle reference value beta reference is transmitted to the wind powered generator unit which realizes the control of the propeller pitch angle for a propeller pitch variable actuating mechanism, and the pneumatic shape of a changed propeller pitch angle blade is changed so as to enable the bearing force of the changed propeller pitch angle blade to be changed and the rotating speed of the wind powered generator unit to trace the rotating speed expected value omega expectation. The propeller pitch variation control method obviously enhances the total precision, is favorable to increasing the annual total generated energy of the wind powered generator unit, has high adaptability for complex and extreme cases, greatly enhances the operating effectiveness, furthest prolongs the mechanical life of the propeller pitch variable actuating mechanism, and also has low remodel difficulty and low cost.

The invention discloses a catalyst used for synthesis of paraxylene through alkylation reactions between coking benzene and methanol and a preparation method thereof. The catalyst comprises carriers and active components, the carriers are HZSM-5 molecular sieves or SAPO-11 molecular sieves which have been subjected to a water steam heating treatment, and the active components are metal oxides. The molecular sieves are subjected to a high-temperature water steam heating treatment, thus active centers and acid-base properties of the molecular sieves are evenly distributed, and the acidity of the molecular sieves is reduced, so active components can be evenly loaded on the carriers, the catalyst is not easy to be poisoned or lose activity when the catalyst is catalyzing the alkylation reactions of coking benzene, the conversion rate of the alkylation of coking benzene is increased, and the service life of the catalyst is prolonged at the same time.

The invention discloses a manual and motor-driven integrated operating mechanism of a breaker. The manual and motor-driven integrated operating mechanism comprises a first fixing plate and a second fixing plate which are installed on a middle cover of the breaker, a movable separation plate is arranged below the first fixing plate, one end of the separation plate is connected with the first fixing plate through a locating pin, a manual/automatic switch is arranged at the other end of the separation plate, a motor is arranged on the separation plate, a gear is connected onto a main shaft of the motor, the second fixing plate is arranged on one side of the first fixing plate, a sliding plate is arranged on the second fixing plate, a rack matched with the gear is fixed on the sliding plate, and the sliding plate is in transmission connection with an operation handle through a linkage component. The operating mechanism of the breaker is installed on the middle cover of the breaker, and the handle can be operated by directly operating the breaker. The manual and motor-driven integrated operating mechanism is simple and reliable in mechanism, convenient to operate and small in size, can achieve automatic manual reliable switching and prolongs mechanical service life.

The invention relates to a direct-current rotary cultivator comprising a frame, a driving device supported by the frame, a cultivating device connected with the driving device through a transmission device, and a control device electrically connected with the driving device and the transmission device; wherein the frame comprises a machine body, a resistance rod and an armrest assembly; the driving device comprises a direct-current motor and a battery pack; the transmission device comprises a first transmission device and a second transmission device, and is connected with the cultivating device through a transmission shaft connected with the second transmission device; the cultivating device comprises a knife rest assembly and a rotary cultivating knife assembly; and the battery pack is arranged between the knife rest assembly and the axle line direction of the armrest assembly. The direct-current rotary cultivator has the advantages of small volume, high efficiency, long service life, easiness, convenience and safety for operation, and uniform cultivated soil particles, and has the functions of self-protection and early warning.

The present invention relates to a breaker interlocking device. It is applicable to mechanical and electric interlocking between two plastic shell breakers in duplicate supply switching device. Said breaker interlocking device includes a mounting base plate and a slide block whose middle portion is easy slide fit on the mounting base plate by means of slide mechanism and whose two ends are extended to the exterior of said mounting base plate. It is characterized by that on the end surface of every end of the above-mentioned slide block a projection is formed respectively, on the mounting base plate are set first signal switch and second signal switch which are correspondent to two projections of said slide block, so that said inter locking device can simultaneously implement mechanical interlocking and electric interlocking.

The invention relates to agricultural machinery, in particular to harvesting machinery for tuber crops of rootstalk crops such as potatoes, sweet potatoes and the like, concretely a turntable type potato harvesting machine, which mainly comprises a traction mechanism, a connecting turntable separation mechanism and a selection automatic sieving separation mechanism. The invention has a work mode that a tractor is connected with the traction mechanism for digging, in addition, the soil and the tuber crops are separated through the turntable separation mechanism, or the automatic sieving separation is selected. The invention fast and sufficiently separates the soil and the tuber crops, is not easy to cause machinery damage, prolongs the service life of the machinery, is not easy to cause soil adhesion, reduces the abrasion on the potatoes, and has safe use.

The invention discloses a driving mode control-based single-phase vacuum circuit breaker of a double arc-extinguishing chamber. The single-phase vacuum circuit breaker comprises a mounting panel, wherein a control box is arranged below the mounting panel; a vacuum arc-extinguishing chamber embedded pole is arranged in a vertical direction; two arc-extinguishing chambers are formed in the vacuum arc-extinguishing chamber embedded pole; the vacuum arc-extinguishing chamber embedded pole is connected with a mounting disc and fixed on the mounting panel; both arc-extinguishing chambers are connected with leading-out wires; moving contacts of both arc-extinguishing chambers are connected with an electrical connecting piece; all the moving contacts below nuts of both arc-extinguishing chambers are sleeved with a disc spring, a three-way part and a nut part; the three-way part is connected with an insulation pulling rod; the insulation pulling rod is connected with a permanent magnetism operating mechanism; and the permanent magnetism operating mechanism is connected with the control box. In the driving mode control-based single-phase vacuum circuit breaker of the double arc-extinguishing chamber, the arc-extinguishing chambers and the insulation pulling rod are sealed and insulated by the vacuum arc-extinguishing chamber embedded pole, the electrical connecting piece connects the moving contacts of the arc-extinguishing chambers to form a series-connected double-break form, and the disc spring is pressed in a piston type driving mode, so the mechanical life of the circuit breaker is greatly prolonged.

A fan controller reduces the percentage of time that fans used in a heat exchanger of an outdoor cabinet that houses electronics and power source must operate to provide required cooling to the electronics and power source. The fan controller can also reverse operation of a fan of the heat controller to help reduce clogging of air intakes as well as to clean the interior of the cabinet. In an embodiment, the controller operates the fans in the heat exchanger according to operating temperature ranges. Thermostats can be used to provide the operating temperature ranges. Depending on the state of the thermostats and the ambient temperature, the fan controller causes one fan to operate in the reverse direction while the other fan is idle, causes one fan to operate in the forward direction while the other fan is idle, or causes both fans to operate in the forward direction.

The invention discloses a wood processing production line with a waste recycling function. The wood processing production line comprises a worktable, an auxiliary conveying belt and a conveying frame, wherein the auxiliary conveying belt and the conveying frame are arranged on the left side and the right side of the worktable correspondingly. A polishing unit is arranged on the auxiliary conveying belt. A laser carving unit is arranged on the rear side of the worktable. A cross beam is arranged on the upper surface of the worktable. A bearing plate is arranged on the cross beam. A cutting unit and a clamping unit are arranged on the bearing plate. The conveying frame is provided with a transfer unit. A waste piece transfer unit is arranged on the front side of the worktable and is jointly composed of a base, a first rotating motor, a rectangular bracket, bearing tables, notches and vacuum suction cups, wherein the base is arranged on the front side of the worktable, the first rotating motor is arranged in the base, the rotating end of the first rotating motor stretches out of the base, the rectangular bracket is arranged at the rotating end of the first rotating motor, the bearing tables are arranged at the left end and the right end of the rectangular bracket, the notches used for containing plates are formed in the bearing tables, and the vacuum suction cups are arranged on the lower surfaces in the notches. The wood processing production line has the beneficial effects of being simple in structure and high in practicability.

The invention discloses an operating mechanism used for a three-station switch. The operating mechanism comprises partition plates, an output main shaft, a drive mechanism and a limiting mechanism, wherein the drive mechanism controls rotation of the output main shaft so that an output shaft connecting lever on the output main shaft can swing between the isolation station, the grounding station and the switch-on station, the drive mechanism comprises an operating main shaft, a grounding main shaft and a switch-on main shaft, and the operating main shaft drives the grounding main shaft and the switch-on main shaft so as to drive the output main shaft to rotate to the grounding position and the switch-on position. One end of the grounding main shaft and one end of the switch-on main shaft are respectively provided with a connecting lever and a spring, wherein the connecting levers and the springs can drive the output main shaft to rotate rapidly, and the limiting mechanism locks the output shaft connecting lever located in the isolation station or the grounding station or the switch-on station. The operating mechanism used for the three-station switch has good switching-on performance, the output main shaft can be accurately limited in the isolation position or the grounding position or the switch-on position, abrasion among all parts can be reduced, and the mechanical service life of limiting parts can be prolonged to the maximum.

A transfix member with a substrate, an optional conformable intermediate layer, and thereover an outer fluorosilicone layer, and a heating member associated with the substrate.

The invention provides an energy-saving automatic control device of a cloth-bag dust removal system and a control method for blast furnace dust removal. The energy-saving automatic control device comprises an input unit, a variable frequency drive unit, an execution unit and a PLC (programmable logic controller) control unit, wherein the input unit is composed of a fast acting fuse, a contactor and an electric reactor; the variable frequency drive unit consists of a rectification module and a capacitor, together with a braking unit, an inverter, a CPU (central processing unit) with a vector control function and a 220V power supply; the execution unit is composed of an electric reactor, a throttle rotary actuator and a throttle control device; the PLC control unit is composed of a PLC and an auxiliary circuit; the primary side of the rectification module of the variable frequency drive unit is connected with an output end of the electric reactor of the input unit and the secondary side of the rectification module is connected with the electric reactor of the execution unit through the capacitor and the inverter; the rectification module and the inverter are connected with the CPU through a bus, the CPU and the PLC are connected in a communication manner through a switching value and an analog quantity, and a throttle control end of the PLC unit is connected with the execution unit. Meanwhile, the device is used for controlling the blast furnace dust removal. By adopting the energy-saving automatic control device and the control method provided by the invention, the fan utilization can be improved, the accuracy control on the dust removal can be realized, the electric energy can be saved, heat productivity of the device can be reduced, the dust recovery rate can be improved, the cloth-bag damage rate can be reduced, and exhaust gas and dust emissions can be decreased.