5results about How to "Improved thermal isolation" patented technology

The invention is suitable for the technical field of aero-engines, and provides a venturi tube structure, a swirler and a combustion chamber, the venturi tube structure comprises a venturi tube outer layer and a venturi tube inner layer, the venturi tube outer layer is provided with a containing cavity, a plurality of first protrusions are arranged on one side of the venturi tube inner layer in the circumferential direction at intervals, and a plurality of second protrusions are arranged on the other side of the venturi tube inner layer in the circumferential direction at intervals; the venturi tube inner layer is embedded in the containing cavity, the multiple first protrusions abut against the inner wall of the containing cavity so that a first cavity can be formed between the venturi tube outer layer and the venturi tube inner layer, and the multiple second protrusions abut against the inner wall of the containing cavity so that a second cavity can be formed between the venturi tube outer layer and the venturi tube inner layer; the first cavity and the second cavity are mutually independent and are used for preventing high temperature from being directly transmitted to the inner layer of the venturi tube. By means of the core structure design of the double-layer tube body and the independent cavities, the first cavity and the second cavity which are independent of each other are formed between the two tubes, direct conduction of high temperature from the outer layer of the venturi tube to the inner layer of the venturi tube is blocked by means of the air heat insulation characteristic, and the carbon deposition restraining effect is remarkable.

The utility model relates to the technical field of mobile power supplies, in particular to a power bank which comprises a columnar shell, a circuit board assembly, a winding disc and a columnar battery cell are sequentially arranged in the columnar shell in the axial direction, and the winding disc, the columnar battery cell and the columnar shell are coaxially arranged; a data line fixing groove is formed in the side portion of the columnar shell in the circumferential direction, and a cable access hole is formed in one side of the data line fixing groove; according to the utility model, the internal structural layout of the power bank is optimized through the layout mode of the columnar shell, the axial layering and the coaxial structure, and the space utilization rate is improved. According to the design, a larger mounting space is provided for the battery cell, the capacity of the battery cell is favorably improved, and the cruising ability of a product is further enhanced; meanwhile, the winding disc is arranged between the circuit board assembly and the battery cell, the physical heat insulation effect is achieved, the heat influence on the circuit board assembly when the battery cell works is reduced, the stability of a circuit system is guaranteed, and the use safety of a product is improved.

The invention relates to the technical field of optical communication, in particular to an optical chip capable of achieving thermal isolation and a manufacturing method of a micro-nano thermal insulation layer, and the optical chip comprises the micro-nano thermal insulation layer and a substrate; a chip working structure is arranged on the upper surface of the substrate, and the micro-nano heat insulation layer is arranged on the upper surface of the chip working structure. The micro-nano heat insulation layer is arranged on the upper surface of the chip working structure, the high porosity characteristic of the micro-nano heat insulation layer is utilized, the heat convection effect on the surface of the micro-nano heat insulation layer can be effectively reduced, the heat exchange capacity between the micro-nano heat insulation layer and the outside is reduced, the stress of the part is concentrated on the micro-nano heat insulation layer, the stress of the chip working structure is reduced, and the chip reliability is improved. The temperature difference between the upper surface and the lower surface of the working structure of the chip is reduced, so that the stability of the optical chip is improved, and the long-term working reliability and stability of the optical chip are improved.

The application provides an anti-corrosion and high-temperature-resistant railway signal cable, which comprises a plurality of cable core assemblies and a sheath assembly, any one of the plurality of cable core assemblies comprises a plurality of cable cores, the cable core comprises a conductor, an anti-corrosion layer and an insulation layer arranged in sequence from inside to outside, and the sheath assembly is arranged on the outer periphery of the plurality of cable core assemblies and comprises a wrapping layer, a heat insulation layer and an outer sheath structure arranged in sequence from inside to outside. In this way, the anti-corrosion layer arranged between the conductor and the insulation layer of the cable core improves the anti-corrosion capability of the cable. Meanwhile, the heat insulation layer arranged between the wrapping layer and the outer sheath structure of the sheath assembly can play a good thermal isolation role between the plurality of cable core assemblies wrapped by the wrapping layer and the external environment, so that the aging or failure of part of structures of the cable core assembly caused by long-term high-temperature work of the cable is avoided, the service life of the cable is improved, and the stability of signal transmission of the cable is ensured.

This invention discloses a mid-to-far-infrared narrowband light source for MEMS, comprising a substrate, a suspension support layer, a heating resistor layer, and a radiation functional layer. The substrate is a silicon substrate. The suspension support layer is fixed to the substrate by anchor points. The heating resistor layer is disposed on the suspension support layer, and the radiation functional layer is disposed above the heating resistor layer. The suspension support layer and the heating resistor layer have Y-shaped grooves forming a Y-beam suspension structure. The Y-beam suspension structure is connected to the substrate by anchor points to form thermal isolation. The surface of the radiation functional layer has a periodically arranged array of micro / nano structures. The period and size of the micro / nano structure array are on the same order of magnitude as the target infrared wavelength, forming an artificial interface with specific equivalent refractive index and resonance characteristics to achieve narrowband spectral output. This invention can reduce heat conduction from the radiation region to the substrate, reduce heat conduction loss, reduce heat leakage, improve thermal isolation performance, and reduce heat capacity, thereby enabling the beam to heat up and cool down rapidly.