30results about How to "Lower Lifetime Costs" patented technology

The invention discloses a variable pitch system for an offshore high-power wind driven generator group and a control method for the variable pitch system. The system comprises independent variable pitch driving systems on each blade, a variable pitch control system, a limit switch, an angular coder and a sliding ring, wherein the variable pitch driving systems are arranged in a hub on the front part of a cabin; the communication and the motive power of the variable pitch driving systems are realized through the sliding ring connected with the main control system in the cabin; and the variable pitch control system is used for allocating instructions from the main control system in the cabin to drivers and feeding back related signals detected by the angular coder, a rotation coder, the limit switch and a blade root sensor to the main control system in real time. In the variable pitch system, the force bearing acceleration sensor is arranged at a blade root and is used for detecting different applied forces of blades at different positions and feeding back to the variable pitch control system, and the variable pitch control system is used for sending a corresponding instruction to the driving systems, so that the size of a pitch angle is separately corrected, and the variable pitch system is completely independent.

The invention discloses a compound deoxidation technology method of a nitrogen-containing duplex stainless steel, including a melting process by adoption of a duplex stainless steel induction furnace. The invention is characterized by using a deoxidizer ferromanganese and ferrosillicon for primary deoxidation after digging up oxidizing slags and entering the beginning of the reduction period, using the deoxidizer Si-Ca for secondary deoxidation before tapping, using the deoxidizer Si-Ca powder for third deoxidation in a ladle. By adopting the compound deoxidation technology method, the oxygen content can be reduced to 0.012 to 0.018 %; the obtained stainless steel has excellent marine corrosion resistance; in the 3.5 % of NaCl solution, the corrosion velocity can reach 2.0 to 8.0*10<-3>g / m<2>h; the method has wide application prospect in the industries such as seawater, sewage water, paper making, stack gas desulfurization in an electric power plant and the like.

The invention discloses an eddy current axial damper. The eddy current axial damper comprises a screw, a nut, a fixed drum, an inner rotating drum and an outer rotating drum. The fixed drum sleeves the outer side of the screw. The inner rotating drum is connected with the nut and arranged between the screw and the fixed drum in a sleeving mode. Magnets are arranged on the periphery of the inner rotating drum, and a conductor pipe is arranged on the inner wall of the fixed drum. The outer rotating drum is connected with the nut and sleeves the outer side of the fixed drum. A conductor pipe is arranged on the inner wall of the outer rotating drum, and magnets are arranged on the periphery of the fixed drum. According to the eddy current axial damper, two sets of module connection are formedbetween the inner rotating drum and the fixed drum and between the outer rotating drum and the fixed drum, the sizes are not mutually affected, the parts can be independently designed, and modularizedproduction and combination are achieved. By means of multiple combination modes such as inner and outer rotation, inner rotation and outer rotation, the requirements for the damper size limitation, the damping force inertia force change mode and the heat dissipation efficiency are met. The structure comprises a movement conversion mechanism and an eddy current damping generator. The eddy currentdamping generator is free of the frictional loss, after the service life of the damper ends, only the movement conversion mechanism needs to be replaced, the eddy current damping generator can continue to be used, and therefore the life cycle cost is reduced.

The present invention relates to a hot air balloon, in particular to a hot air balloon with high-temperature high-temperature gas inside, capable of suspending in the air at a certain height, and capable of controlling landing, which consists of the following parts: a capsule body; a structure network; several turbulators; a remote heating module; the remote heating module is installed inside the hot air balloon through a bracket; a gas nozzle; a state sensor and controller module; When the gas is in the air, the load capacity of the hot air balloon is the strongest. When the mass of light gas in the capsule is less and the temperature is lower, under the action of the air pressure outside the capsule, the capsule will deform and the volume will decrease. The load capacity is reduced.

The invention discloses a water-coupled charging blasting demolition method for a reinforced concrete beam or column. The process that blast holes are formed along the axis of the reinforced concrete beam or column and water is poured into the blast holes is adopted, and the aims of reducing resistance of deep hole charging, achieving accurate charging, efficiently utilizing water pressure blasting energy, effectively controlling the strength and amount of vibration of blasting, blasting flyrock, air shock waves and poisonous blasting gas and reducing blasting dust are achieved. According to the method, the process is simple, operation is easy, the application range is wide, and the method is an ideal construction method for demolition of the reinforced concrete beam and column.

The invention relates to a periodically arranged sparse array antenna and an arrangement method thereof. The array antenna includes S antenna periodic structures, and each antenna periodic structure includes N1 transmitting antennas and N2 receiving antennas. The N1 transmitting antennas are arranged in a first straight line, the N2 receiving antennas are arranged in a second straight line, the first straight line is parallel to the second straight line, and the first straight line is located above or below the second straight line. The S antenna periodic structures are sequentially arranged into an array antenna, the array antenna comprises M equivalent phase centers, and the M equivalent phase centers are arranged in an equidistant straight line, wherein a midpoint between any one of thereceiving antennas and any one of the transmitting antennas in the array antenna is an equivalent phase center, and 1-S(N1+N2) / M is larger than 0. The use of the periodic structures facilitates the formation of reusable standard modules, the improvement of product consistency is facilitated, maintenance parts are reduced, the maintainability is improved, and the full life cost of a product is reduced.