48results about How to "Uniform thermal expansion" patented technology

The present invention is a gas turbine that prevents heat-related axial misalignment of the rotary shaft of a rotor, said gas turbine being provided with: a strut (23); outer diffuser (24); an inner diffuser (25); a strut cover (26); and a partition wall (28). The gas turbine is provided with: an inflow port (31) through which cooling air (W) is drawn in; a first flow path (R1) formed between a casing wall (21) and the outer diffuser (24); a second flow path (R2) formed between the strut (23) and the strut cover (26); a third flow path (R3) formed between the inner diffuser (25) and the partition wall (28); and an outflow port (51) provided on the inner diffuser (25).

Disclosed is an EL element in which the rigidity and thermal expansion of the whole EL element is homogeneous, the spacing between film substrates provided respectively on both sides of the EL element can be kept constant, and the whole EL element is flexible. The EL element comprises a first film substrate, an EL part, and a sealant layer, the EL part comprising a first electrode, an EL layer, and a second electrode and being provided on a part of a surface of the first film substrate, the sealant layer being provided to cover the EL part and to cover the EL part-free part of the surface of the first film substrate in such a manner that the sealant layer covering the EL part is contiguous with the sealant layer covering the EL part-free part of the surface of the first film substrate.

The invention discloses a highway composite acoustic panel material and a preparation method thereof, and relates to the field of acoustic panels. The highway composite acoustic panel material is prepared from the following raw materials in parts by weight: 20-30 parts of waste polypropylene plastic particles, 8-15 parts of polypropylene, 8-15 parts of vinyl-vinyl acetate copolymer, 6-12 parts ofglass bead, 15-20 parts of expanded perlite, 5-10 parts of mica powder, 4-8 parts of fiberglass, 3-6 parts of nano titanium dioxide, 3-6 parts of nano silicon nitride, 10-18 parts of lignocellulose, 3-5 parts of hydroxymethyl cellulose, 2.5-3.6 parts of silane coupling agent, 1.8-3.5 parts of antioxidant and 2.8-4.2 parts of flame retardant. The acoustic panel material is prepared by taking the waste polypropylene plastic particles as a main raw material, the waste is recycled, the production cost is low, the material is excellent in flame resistance, corrosion resistance, water resistance andsound insulation property, and the preparation method is simple.

The invention provides a bonding forming method of a silicone rubber soft mold pressing heat insulation layer. The method comprises the following steps: firstly preforming a required non-vulcanized heat insulation layer through a tool, wherein a shape, a structure, thickness and the like of the preformed heat insulation layer meet design requirements; pasting the preformed heat insulation layer ina housing of a combustion chamber, and performing pressing vulcanization under a temperature condition required by vulcanization of the heat insulation layer by taking a tool formed by a silicone rubber material with a high expansion coefficient as a pressing medium. The method can improve compactness of the heat insulation layer, ensures a high precision molding surface and thickness of the heatinsulation layer and lowers the production cost.

The invention provides a semiconductor device and a formation method thereof. The formation method comprises the following steps: providing a substrate; etching a first dielectric layer and a barrierlayer to expose a first metal layer so as to form a switch hole; etching and cleaning the switch hole, while the first metal layer exposed out of the switch hole is laterally etched; and forming an insulating layer which at least covers the surface of the switch hole and fills the area where the first metal layer is laterally etched. The area where the first metal layer is laterally etched is filled with the insulating layer, thus avoiding the formation of gaps and improving the stability and the reliability of the contact resistance in the switch hole. The insulating layer of the side wall ofthe switch hole separates the first metal layer of the bottom circumferential ring of the switch hole to prevent it from being damaged, and the insulating layer covers the side wall of the switch hole so that the flatness of the switch hole is high, the uniformity of film deposition in the switch hole and the metal layer filling the switch hole is improved and the thermal expansion and stress areenabled to be uniform.

The invention relates to a high-pressure module, in particular to a high-pressure module for a supercritical 350MW three-cylinder steam turbine. The problems that an existing high-pressure module of a three-cylinder steam turbine is complex in steam inlet structure, high in weight and low in cylinder efficiency, thermal expansion of an inner cylinder split flange is uneven, and field installation is inconvenient are solved. Two high-pressure main steam adjusting combination valves are directly connected with a high-pressure outer cylinder through flanges, a high-pressure inner cylinder is installed in the high-pressure outer cylinder, a high-pressure rotor is rotatably installed in the high-pressure inner cylinder, the end of the high-pressure inner cylinder is connected with a high-pressure inner cylinder positioning plate through bolts, a high-pressure outer cylinder positioning plate is connected with the end of the high-pressure outer cylinder through bolts, a high-pressure cylinder adjusting end steam seal and a high-pressure cylinder electric end steam seal are installed on the two sides of the high-pressure outer cylinder respectively, a high-pressure steam supplementing valve is installed on each high-pressure main steam adjusting combination valve, one end of each steam supplementing guide pipe is connected with a corresponding high-pressure steam supplementing valve, and the other end of each steam supplementing guide pipe is connected with a connecting pipe structure of the high-pressure outer cylinder. The invention is used in the supercritical 350MW three-cylinder steam turbine.

First and second multi-pair thermocouples (21, 22) are formed on the upper surface of a heat-sensitive member (10), and a thermally uniformizing member (30) is adhesively attached to a base portion (11) of the heat-sensitive member (10). The thermally uniformizing member (30) is formed of a heat-resistant and electrically insulating material having a higher thermal conductivity than the heat-sensitive member (10) and a linear expansion coefficient approximate to the linear expansion coefficient of the heat-sensitive member (10). For example, the heat-sensitive member (10) is formed of mullite, and the thermally uniformizing member (30) is formed of aluminum nitride, whereby damage caused by thermal expansion can be prevented and at the same time the base portion (11) of the heat-sensitive member (10) can be thermally uniformalized.

The invention proposes a method (2) for coating a turbine blade (1) comprising an airfoil (4) and at least one platform arranged at the end of the airfoil (4) (2), wherein the or each platform (2) has a contact region (6) and at least one planar raised region (8a, 8b) adjacent to the contact region (6), and the airfoil ( 4) terminating in the contact zone (6), with the following method steps: applying at least a first layer (22) of the coating (24) on the airfoil side on the platform (2), and applying the coating (24) ) of the at least first layer (22) remaining on the end face (10c) within the range of the contact zone (6), the at least first layer (22) of the coating (24) in the protruding zone (8a, 8b) are removed from at least one end face (10a, 10b) of the platform (2).

The invention discloses ardealite fireproof door core filler and a preparation method thereof, belongs to the technical field of door core filler processing, and aims at solving the problems that an existing fireproof door core plate is poor in mechanical property and tedious in door core plate installation. The preparation method comprises the following steps: weighing alpha type phosphogypsum, polyester fiber, redispersible latex powder, expanded foaming microbeads, fly ash microbeads, a waterproof agent, aluminum powder and lime according to component amounts, mixing to obtain composite phosphogypsum powder, mixing the composite phosphogypsum powder with water according to a mass ratio of 1: 2 to obtain a component A, mixing the aluminum powder with the lime to obtain a component B, mixing the component A with the component B according to a mass ratio of 1: 1 to obtain a liquid slurry filler, and mixing the liquid slurry filler with water according to a mass ratio of 1: 1 to obtain the waterproof material. And the liquid slurry filler is poured into the door plate cavity, the liquid slurry filler is naturally foamed for 1.5-2 h, and the liquid slurry filler is in a solid state after being foamed. The problems that a fireproof door core plate is poor in mechanical property and tedious in door core plate installation are solved, and the fireproof door core plate has the advantages of sound insulation, heat insulation, heat preservation, fire prevention, light volume weight and the like.

The invention discloses a condensing turbonator starting method. The method comprises the steps that at time of impulse starting, a unit vacuum breaking valve is adjusted when the rotor speed reachesa medium speed of 900-1000 r/min for warming-up, the exhaust steam temperature is increased uniformly to 60-70 DEG C with the speed increase not higher than 5 DEG C/min, warming-up is performed for 30-40min at the exhaust steam temperature, vibration is checked, and if the sound is normal, a unit surpasses a critical point at the speed of 200 r/min; after the unit surpasses the critical point, thespeed of the unit rises uniformly to 300 r/min from 100 r/min; after grid-connection is completed and the thermal expansion value reaches 70%-80% of the value at full load, the vacuum breaking valveis closed, it is noted that the exhaust steam temperature decreasing amplitude should not exceed 5 DEG C/min when the valve is closed, and at the moment, a condensing turbonator is started. By adopting the technical scheme provided by the invention, the exhaust steam temperature is high during warming-up of a turbine, unit thermal expansion is uniform, the differential expansion is small, the unitis free of severe vibration when surpassing the critical point, the unit vibrates stably in a loading process after grid-connection, and the load can become full in a short time.