2375 results about "Thermal protection" patented technology

The heat insulating composite aerogel material consists of silica aerogel, titania as infrared opacifier and reinforcing fiber in the weight ratio of 1 to 0.1-0.7 to 0.7-3. Its preparation process includes compounding sol with silanolate, surface modifier, titanolate, alcohol solvent, acid catalyst and alkaline catalyst in certain proportion; soaking fiber felt or prefabricated fiber part in the sol; and supercritical fluid drying. The material of the present invention has high blocking effect on solid heat transfer, air heat transfer and infrared radiation heat transfer, excellent hydrophobicity, simple preparation process, low cost, mechanical strength over 2 MPa, and wide application range, and may be used in strict heat protection condition in aeronautics, astronautics, military and civil uses.

The functionality of electronic convertors for low voltage filament lamp applications, such as halogen lamps, can be increased by including auxiliary circuits. Such auxiliary circuits may include gate drive resistors; a charge pump for sustaining the DC supply; open circuit protection; short circuit protection; thermal protection; extended resetting time; latched shutdown; self-dimming; a digital (DALI) interface; and line voltage compensation.

Method and Apparatus for efficiently applying coating systems to a surface that can survive the thermal gradient that is encountered in high temperature, high heat flux environments such as a rocket engine or like using vapor or cluster deposition process such as a directed vapor deposition (DVD) approach. Method and Apparatus provides electron or other energetic beam technique to evaporate and deposit compositionally and morphologically controlled bond coats at high rate while providing a highly strain tolerant thermal barrier coating that has an improved porosity morphology between columnar grains.

A composite material of sandwich structure integrating loading, heat insulation and ablation and the manufacturing method are characterized in that an integrated pre-forming body is acquired by puncture and suture of the reinforcing material of a bearing layer, the reinforcing material of an ablating cover, and a heating insulation layer positioned between the two layers; an epoxy resin system and a phenolic resin system are injected simultaneously into a vacuum-pumped mould, in which the integrated forming body is pre-placed, by two sets of RTM injection systems respectively, then, the reinforcing materials of the bearing layer and the ablating layer are soaked by epoxy resin and phenolic resin respectively; and the composite material of sandwich structure integrating loading, heat insulation and ablation can be obtained by solidified molding after mould filling. The invention has the advantages that the composite material of sandwich structure integrating loading, heat insulation and ablation is put forward and can be integrally formed by one-time operation, the function of the interlayer between every layer of the composite material is enhanced greatly, the integrality is good; the stratifying and peeling of the composite can be reduced effectively, and the products have good designable property and can be widely applied to the structural parts of aerospace which need heating insulation and thermal protection.

The invention provides a thermal protection voltage-sensitive resistor module used for surge protection, which consists essentially of a metal oxide voltage-sensitive resistor, a thermal response switch, a set of thruster with a compression spring and a wedge-shaped quencher and a case. Thermal coupling exists between the thermal response switch and the metal oxide voltage-sensitive resistor. When the metal oxide voltage-sensitive resistor is overstressed, the resistor emits heat, the thermal response switch can immediately sense the heat and soften the welding point of solder with low melting point, then the welding point is forced to be quickly disconnected and part of the wedge-shaped quencher is inserted into the clearance at the breakage place of the welding point under the joint effect of the thruster with the spring and the wedge-shaped quencher and the resilient conductive connection arm, thus the quenching effect is enhanced.

The present invention relates to systems and methods for maintain the active power production of a fluid turbine and regulating the temperature of an electrical generating component by controlling the reactive power production. A thermal parameter of the electrical generating component is monitored. If the electrical generating component exceeds a thermal parameter the reactive power production of the turbine is reduced. A fluid turbine may be de-rated to further reduce an electrical generating component's thermal parameter. A fluid turbine may shut down to further reduce an electrical generating component's thermal parameter. A fluid turbine's power production is re-started when the electrical generating component returns to an acceptable thermal parameter.

The invention discloses an ultrasonic ground experimental wind tunnel used for knocking combustion research, and the wind tunnel provided by the invention comprises an ultrasonic premixing heater, an experimental section and a vacuum chamber, wherein the ultrasonic premixing heater comprises an injector 6, a preheating combustion chamber 1, an array nozzle module and a mixing section 3. The preheating combustion chamber adopts three components for combustion, and supplements oxygen or air after combusting hydrogen and air; and the preheating combustion chamber is designed to be in a colliding injection mode. The technique has the advantages that the combustion local high temperature can be effectively reduced, the thermal protection difficulty is reduced, the uniformity of flow field parameters such as gas mixture temperature, components and the like can be ensured, and the content of the oxygen in the gas mixture can be freely adjusted. The vacuum chamber is connected to the back of the experimental section, so that the back pressure of the experimental section can be reduced, and the design range of ultrasonic stream Mach numbers in the experimental wind tunnel is expanded.

Methods and systems for thermal protection of a voice coil of a loudspeaker. The method involves driving the loudspeaker based on an input signal received at an input terminal and monitoring both a voltage applied to the voice coil and a current flowing through the voice coil. From the monitored voltage and current, an estimate of temperature of the voice coil and an estimate of power dissipation in the voice coil is determined. The method includes estimating the voice coil resistance based on the monitored voltage and current and at least the estimate of temperature is determined based the estimate of resistance. A gain control signal for modulating a gain applied to the input signal is generated as a function of both the estimate of temperature of the voice coil and the estimate of power dissipation in the voice coil. This means that high power dissipation, which would over long periods lead to overheating, can nevertheless be permitted when the voice coil temperature is low enough, while at high voice coil temperatures any gain modulation applied for thermal protection can be reduced if the power dissipation level drops.

The invention belongs to the field of inorganic materials, particularly relates to a thermal protection coating with component gradient change and a preparation method. The thermal protection coating comprises two components of M1 and M2, wherein the M1 is selected from one of YSZ, lanthanum aluminate, mulite or BSAS, the M2 is selected from one of Ln2Zr2O7, Ln2Ce2O7, Ln2SiO5, Ln2Si2O7 or MoSi2, and Ln is selected from rare earth elements the atom coefficients of which are 57-71, Y or Sc. The thermal protection coating has the characteristics of good coating compactness, high bonding strength with a substrate, low thermal conductivity and the like and has favorable thermal shock resistance.

Protective insert plates (54, 56) installed on a working gas face (42) of a turbine vane platform (26) provide replaceable portions of a turbine shroud for improved maintenance. The plates act as tiles, and may be formed of ceramic materials for thermal protection. Two cages (58, 60) in the vane platform slidably receive the two insert plates (54, 56) from opposite circumferential sides (36, 38) of the platform. The plates slide into the cages up to the pressure and suction sides (32, 34) of the vane airfoil (22). The plates may have proximal edges (62, 64) shaped to fit the respective pressure and suction sides of the vane airfoil. A retainer plate 66 may be attached to a flange (72) on the cooled face (48) of each platform, and may contact each insert plate with a locking device (74, 76) to prevent sliding of the plate in the cage.

A loudspeaker protection system includes a filter arrangement for defining one or more frequency bands of an audio signal, controllable amplifier/attenuator combinations coupled to the filter arrangement, and a processing arrangement coupled to control the amplifier/attenuator combinations, such as to determine audio power in at least one of the frequency bands representing relevant loudspeaker protection information used for selective audio power control in the at least one frequency band. This system has the features for a fast and/or slow thermal protection, as well as for a cone excursion protection, all for a loudspeaker in such a system.

The invention provides a silicon-aluminum aerogel composite material which comprises silicon-aluminum composite aerogel (1) and an inorganic fiber material (2), wherein the silicon-aluminum composite aerogel is prepared from a silicasol aqueous solution. The invention also provides a method for preparing the silicon-aluminum aerogel composite material, which comprises the steps of preparing the silicon-aluminum composite aerogel, dipping sol, gelatinizing, ageing, overcritically drying and the like. With excellent high-temperature resistance, good mechanical property and low thermal conductivity at high temperature, the silicon-aluminum aerogel composite material can meet the high requirement of thermal protection in the fields of aviation, aerospace and military affairs and can also be applied to the field of civil heat insulation.

The invention provides a keeping warm flocculus which is prepared from raw material by weight including 56%-85% fine denier fibre and/or super fine denier fibre, 0-30% hollow fibre, 5-30% felt fibre. The preparing method includes steps as follows: loosing and mixing various fibre raw material; then combing, lapping for forming fibre net; then processing disorder drafting to the felt net for forming solid net shape crossing struture; then heating and baking the felt net, at least melting surface of the felt fibre for felting surrounding fibre. The fine denier fibre can increase content of still air in the keeping warm flocculus, reduce heat quantity conduction, and can divide space in the keeping warm flocculus into smaller space for avoiding or reducing air convection, accordingly increase warm keeping property of the keeping warm flocculus; the hollow fibre can increase filling power and compress rebound property of the warm keeping flocculus; filling power and compress rebound property of the warm keeping flocculus are increased after being disorder draft.

A self-wrapping, non-woven sleeve for routing and protecting elongate members includes a non-woven elongate wall having an outer surface with opposite sides extending along a longitudinal axis of the sleeve. The sides self-wrap about the longitudinal axis to provide a tubular cavity in absence of an externally applied force. The sides are extendable away from one another under an externally applied force to expose the cavity for insertion of the elongate members, wherein the sides return to their self-wrapped configuration upon removal of the externally applied force. Further, an outer reflective layer is attached to the outer surface of the self-wrapping wall to provide enhanced thermal protection to the elongate members in the cavity.

The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and continuous functions, so as to reduce the temperature of the ballast while continuing to operate it.

A thermal protection material is provided. The material includes a non-woven nanotube sheet, a substrate material adjacent to the non-woven nanotube sheet, and an adhesive material positioned between the non-woven sheet and the substrate material. The thermal protection material can further include a coating that can enhance strength and oxidation protection. An apparatus for collecting the non-woven nanotube sheet and method for manufacturing the thermal protection material are also provided.

A charger (1) includes a connecting portion (5) provided in an upper case (3) of the charger. The connection portion (5) includes a pair of guide rails (6) to which a battery pack (40) is slidably attached. The charger further includes between the guide rails (6) a terminal block having various terminals (12–14) as well as a slide cover (21) linearly slidable in parallel with the direction in which the battery pack slides on the charger. Under normal operating conditions, the slide cover (21) is biased to a rear position in which the cover (21) is located over and protects a terminal block (11). When the battery pack (40) is set on the charger, the battery pack abuts and slides the slide cover to a forward position in which the terminal block (11) is exposed.