6results about How to "Reduce design pressure" patented technology

The application discloses a wide-angle frequency scanning antenna based on a dual-band coupling filter, comprising a power divider module, a dual-band filter module and an antenna radiation unit. The power divider module is used for power distribution of an input signal; the dual-band filter module is used for phase modulation of the output signal of the power divider; and the antenna radiation unit is used for signal radiation of the dual-band. The application adopts the dual-band filter to modulate the signal phase, realizes two groups of different phase distributions changing with frequency in the specified two frequency bands respectively, and covers different angle ranges in the positive and negative directions respectively, so that the wide-angle scanning from-60° to 60° is realized finally. The dual-band design reduces the design pressure of the single-band scheme. With the flexible bandwidth design function of the filter, the frequency scanning antenna can be customized according to the actual demand. The wide-angle frequency scanning antenna realized by the application has the advantages of large scanning range, small scanning gain fluctuation and customizable frequency band range.

This invention discloses a high-pressure hot water thermal energy storage phase change constant-pressure system and method for compressed air energy storage power stations, belonging to the field of compressed air energy storage. It includes an atmospheric pressure cold water storage tank, at least one high-pressure hot water storage tank, an energy storage heat exchanger, an energy release heat exchanger, a cold water circulation pump, and a constant-pressure system. A steam space is reserved at the top of the high-pressure hot water storage tank. The constant-pressure system includes a condenser and a high-pressure hot water buffer tank. The constant-pressure system maintains the pressure stability inside the high-pressure hot water storage tank by condensing steam and buffering pressure fluctuations. During energy release, the hot water is driven by the steam pressure inside the high-pressure hot water storage tank, eliminating the need for a hot water circulation pump. This invention, through cold and hot water separation, steam phase change constant-pressure design, and a pump-free design, significantly reduces the number and pressure levels of high-pressure hot water storage tanks, lowers equipment investment, and simultaneously improves thermal storage temperature and system efficiency, providing an efficient and economical solution for the large-scale application of compressed air energy storage power stations.

The application provides a method for suppressing sideband harmonics of a multi-rate staggered sampling NLM modulation VSC system. In the method, a plurality of sub-modules of each bridge arm are evenly divided into M independent sub-module groups; a specific time is sequentially offset relative to a global time reference to trigger the sampling of the modulation wave and the calculation of the number of sub-modules of each sub-module group; the number of sub-modules required by each group is independently calculated, and the corresponding sub-module is selected from the group according to the global capacitor voltage sorting result to perform the switching action. Through the staggered action of each group, the equivalent update frequency of the bridge arm total voltage is increased, the sideband harmonic frequency caused by the sampling-holding effect is shifted, and the amplitude is reduced. Without increasing the sub-module switching frequency, without changing the original control period and communication load, the low-order sideband harmonics in the bridge arm voltage are effectively suppressed, the AC side power quality is improved, and the filter design pressure is reduced.

The application discloses a compressed air energy storage power station vertical shaft and spherical tank combined heat storage constant pressure system and method, and belongs to the technical field of compressed air energy storage, wherein the system comprises a heat storage and heat exchange unit, a vertical shaft cold storage unit, a nitrogen temperature control and constant pressure unit and a nitrogen supplement unit; the method is realized based on the system and comprises energy storage, energy release, constant pressure stabilization and nitrogen supplement steps. The application stores low-temperature water in an artificial underground chamber vertical shaft, replaces traditional cold water spherical tanks, reduces the number of spherical tanks, reduces the design pressure of the spherical tanks through nitrogen temperature control and regulation, breaks through the heat storage temperature improvement bottleneck, can significantly improve the efficiency of the energy storage power station, reduces the initial investment and operation cost of the system, reduces pressure fluctuation and prolongs the service life of equipment.

The application provides a method for forming a calendered glass with a thickness of less than 2mm, and belongs to the technical field of calendering of glass. The method comprises the following steps: flowing a glass melt with a viscosity of less than 10 4 Pa·s into a closed container containing a metal liquid; when the viscosity of the glass melt increases to 10 5.3 -10 5.8 Pa·s, the glass melt is formed into a viscoelastic glass ribbon with a certain width and a thickness of H1 by horizontal drawing, and H1<4mm; when the viscosity of the viscoelastic glass ribbon increases to 10 5.8 -10 6.3 Pa·s, the viscoelastic glass ribbon is introduced between an upper calendering roller and a lower calendering roller through a guide roller; after being drawn and extruded by the upper calendering roller and the lower calendering roller, the viscosity of the viscoelastic glass ribbon is greater than 10 6.8 Pa·s, the thickness is H2, H1>H2, and H2≤2mm; and the viscoelastic glass ribbon is annealed and cooled to obtain a product. The method is used for producing calendered glass with a thickness of less than 2mm.

The present invention proposes a reinforcement mechanism and a method of using the same for stacked flat-panel satellites, and belongs to the field of space product structure and mechanism design. The problem of poor mechanical properties of existing flat-panel satellite assemblies is solved. It includes a first reinforcement mechanism and a second reinforcement mechanism, and the first reinforcement mechanism and the second reinforcement mechanism are alternately arranged around the outside of the satellite assembly. The first reinforcement mechanism includes a first recovery rod, a first steel belt fixing seat and an elastic steel belt. A plurality of first steel belt fixing seats are arranged axially at intervals on the first recovery rod, and two elastic steel belts are connected to both sides of each first steel belt fixing seat, respectively. A plurality of second steel belt fixing seats are arranged axially at intervals on the second recovery rod, and the first steel belt fixing seat and the second steel belt fixing seat are alternately arranged in the vertical direction. One end of the elastic steel belt is connected to the first steel belt fixing seat, and the other end is connected to the second steel belt fixing seat through a fixing rope. It is mainly used for the reinforcement of stacked flat-panel satellites.