39results about How to "Reduce exhaust velocity" patented technology

The invention relates to a method for preparing pure-phase gamma-AlON transparent ceramic powder by carbothermal reduction of gamma-Al2O3, and belongs to the field of preparation of transparent ceramic materials. According to the preparation method, nano-alpha-Al2O3 and activated carbon are taken as raw materials; powder is filled in a graphite crucible loosely, wherein an aluminum oxide plate is paved at the bottom of the graphite crucible; an air hole which penetrates through the powder is preformed at the aluminum oxide plate; a graphite cover provided with fine and dense air holes is used for covering the hole; the pure-phase gamma-AlON transparent ceramic powder is prepared by adopting a two-step heating process in a flowing nitrogen environment with a micro positive pressure. By the adoption of the preparation method, the vacuumizing difficulty can be effectively reduced, powder is prevented from scattering in a vacuumizing stage, the time required for discharging adsorbed gas can be greatly shortened, the vacuumizing speed is high, and the preparation efficiency of the gamma-AlON powder is greatly improved; the obtained gamma-AlON powder phase has stable and reliable compositions and can be used for pressure-less sintering preparation of AlON transparent ceramics with high transmittance; the process is simple and is easy to operate, and is suitable for industrial production.

The invention provides a temperature controlled and pressure controlled formation method of a lithium ion battery. The method comprises the step of performing a liquid injection and formation method on an assembled battery under the condition of controlling the temperature and pressure. The temperature controlled and pressure controlled formation method comprises multi-stage formation technologiesof low pressure formation, normal temperature formation and high temperature formation. The lithium ion battery acquired by the method is good in cycling life and high temperature stability.

The invention discloses a turbofan type vehicle engine. The turbofan type vehicle engine mainly consists of a fan, a low-pressure compressor, a high-pressure compressor, a combustion chamber, a high-pressure turbine, a low-pressure turbine, a spraying pipe, a high-pressure shaft, a low-pressure shaft, an inner duct and an outer duct, wherein the inner duct is supported on the outer duct through a front bracket and a back bracket; the high-pressure shaft and the low-pressure shaft are respectively supported in the inner duct through a front bearing and a back bearing; the high-pressure shaft is hollowed; the low-pressure shaft penetrates through the high-pressure shaft; the fan, the low-pressure compressor and the low-pressure turbine are mounted on the low-pressure shaft through a one-way bearing; and the high-pressure compressor and the high-pressure turbine are mounted on the high-pressure shaft through a one-way bearing. The turbofan type vehicle engine has such advantages as light mass, high output power, strong power and high thrust-weight ratio, and in particular, is suitable for such vehicles having higher requirements on speed as sports cars.

The invention discloses a high-low voltage power distribution cabinet with a temperature regulation and control intelligent system, which belongs to the technical field of power distribution cabinets.The high-low voltage power distribution cabinet comprises a cabinet body, an air cooling box is arranged at the top of the inner cavity of the cabinet body, the air cooling box comprises a mounting frame sleeved in the inner cavity of the cabinet body, a partition plate is arranged in the middle of an inner cavity of the mounting frame, a snakelike groove is formed in the outer wall of the top ofthe partition plate, and a snakelike pipe is clamped in the snakelike groove. In the case of cooling, condensed liquid is sucked by a circulating pump; then the condensed liquid is fed into the snakelike pipe through a condensed liquid inlet pipe; condensate in the inner cavity of the snakelike pipe can cool air on the top of the partition plate. The cooling box is matched with the circulating pump and the connecting pipe, low-temperature condensate circularly flows through an inner cavity, and water in the inner cavity of the water cooling box can be cooled. The air pump sends external air below the liquid level through the air pipe, the air enters the shell cover through the air supply pipe after being cooled by low-temperature water, the low-temperature air in the inner cavity of the shell cover enters the top of the partition plate, and the cooled air at the top of the partition plate enters the inner cavity of the cabinet body through the groove, the channel and the air outlet cover.

The invention provides a compressor and an air conditioner. The compressor comprises a main shaft, an air cylinder, a flange and a slip sheet, wherein the main shaft comprises convex parts, and the convex parts, the air cylinder, the flange and the slip sheet jointly form compression cavities, at least one main shaft exhaust port is formed in the position, corresponding to each compression cavity,of the convex parts, a flange exhaust port is formed in the flange, one ends of the main shaft exhaust ports communicate with the compression cavities, the other ends of the main shaft exhaust portscan communicate with the flange exhaust port in the rotating process of the main shaft so as to exhaust air, an exhaust valve assembly is arranged at the flange exhaust port, and the exhaust valve assembly can automatically exhaust the air according to the pressure in the compression cavities. According to the compressor and the air conditioner, the structural design of the main shaft exhaust ports, the exhaust valve assembly and the flange exhaust port, it is effectively guaranteed that the number and area of the exhaust port in each compression cavity are fixed, the exhaust port area is large, the exhaust speed is reduced, smooth exhaust of the compressor can be achieved, exhaust losses are effectively reduced, the exhaust mode is simple, and the working performance and reliability of the compressor are ensured.

The invention provides a tail gas pipeline capable of generating electricity efficiently. The tail gas pipeline capable of generating electricity efficiently comprises a mounting bracket, generators, a rotating shaft, vanes and a tail gas pipeline, wherein the vanes are obliquely arranged on the outer side of the rotating shaft and surround the rotating shaft for a circle; the generators are arranged on the two ends of the rotating shaft; the two ends of the rotating shaft are connected to the rotating shafts of the generators through a shaft coupler; the rotating shaft is located in the tail gas pipeline; the mounting bracket is sleeved on generator main bodies and is fixedly mounted on the generator main bodies through fastening pieces; the rotating shaft is mounted in the tail gas pipeline through the mounting bracket; a spiral gas guide channel is formed in the inner wall of the tail gas pipeline; the generators are connected to an electricity storage device through a connecting line. The tail gas pipeline capable of generating electricity efficiently can greatly improves power generation rate of the tail gas as power generation devices are arranged in the pipeline, the generators are vertically mounted in the tail gas pipeline, the vanes are arranged obliquely, and the spiral gas guide channel is formed in the pipeline, and achieves extremely good market foreground as a common pipeline can be reconstructed.

A pneumatic control device of auto door includes a first directional control valve configured to control a direction of a compressed air supplied to a door cylinder for opening and closing a door, a door detection sensor configured to detect an open/close state of the door, first and second exhaust lines respectively connected to first and second outlet ports of the first directional control valve, and second directional control valves installed in the first and second exhaust lines respectively to operably exhaust the compressed air exhausted from the first and second outlet ports according to an emergency stop signal, and capable of changing positions to reduce an exhaust speed of the compressed air in case that the door is not completely open or closed when an operation signal is generated after the emergency stop signal.

The invention discloses a parallel-shaft type aviation gas engine. An engine system is mainly composed of a compressor and a gas turbine, and the two parts are arranged in a U shape; a gas turbine connected with the compressor is omitted, a heat exchanger is additionally arranged in front of the compressor, a power output shaft drives a compressor shaft through a variable-speed gear or a multistage gearbox, the exhaust temperature and the exhaust speed are both lower than those of a turboshaft engine, and the gas engine is more suitable for being used for vertical take-off and landing airplanes, especially ship-based vertical take-off and landing airplanes, compared with the turboshaft engine; and the double shafts of the engine are arranged in the front of the engine in parallel, two fans can be mounted as well, the thrust power and efficiency of the engine are improved greatly, and the oil consumption is lowered remarkably.

The invention discloses an automatic pet dryer which comprises a main drying box, a plurality of feet and a fan heater with a timing switch. A cross partition screen is arranged in the main drying box, a plurality of air inlet holes are formed in the main drying box, the main drying box is provided with a side opening, a limit cylinder and a side door, a plurality of air outlets are formed in thetop of the main drying box, a limit piston is arranged in the limit cylinder, a piston rod penetrates an air cavity and is arranged on the limit cylinder, a reset spring is arranged in the limit cavity, a limit groove is formed in the bottom of the side door, the limit cavity, the air cavity an the limit groove are formed from bottom to top, the limit cavity, cylinder air holes, box air holes andan upper box cavity are sequentially communicated, an inner plate is arranged in the main drying box, and an ejector spring is arranged on the inner plate. The automatic pet dryer has the advantages that hairs of a pet can be effectively dried by the aid of hot air, the device has a timing function, supply of the hot air can be automatically stopped after drying processes are completed, and the pet can be automatically released and can freely break away from the drying box.

The invention discloses environmental protection purifying equipment for a coating machine. The equipment comprises a base plate, a technique chamber and a mounting plate are arranged on the top end of the base plate, and the technique chamber is located at one side of the mounting plate; a vibrating sensor and a door board are arranged on the top end of the mounting plate, a first vibrating sensor is located at one side of the door board, and an idler wheel is connected to the top end of the technique chamber through a rail; when an elevated working platform vibrates, an NUCNUC controller controls a motor to operate so as to compensate for the vibration of the elevated working platform, and the motor operates and drives the idler wheel to rotate; the idler wheel drives a sliding car to move, the sliding car drives a damping supporting rod to move, and a pulling spring at one side of the damping supporting rod pulls the damping supporting rod to be pressed at one side of the door board; the problems are solved that when a damping device of a fork lift truck is used, a damping rod of the damping device of the fork lift truck achieves damping process through a telescopic rod, long-term use of the telescopic rod easily causes spring aging, and the service life of the damping device of the fork lift truck is affected.

The invention discloses an exhaust port of a composite gear tooth compressor. The exhaust port (401) is formed in an exhaust end cover (4); the contour curve of the exhaust port (401) comprises: a left edge curve EF, a right edge curve GH, an upper edge curve EH, a lower edge curve FG, a left upper vertex E, a left lower vertex F, a right upper vertex H and a right lower vertex G; the left edge curve EF, the right edge curve GH and the upper edge curve EH are three circular arcs; and the lower edge curve FG is a partial curve of a first cycloid AB of a first tooth groove (101). The exhaust port (401) is large in area, low in exhaust velocity and small in exhaust pressure loss; power consumption of the compressor and leakage of high-pressure gas at the exhaust port at the end face of a rotor are effectively reduced; and clearance volume formed after the exhaust is finished is small, volume efficiency is high, and meanwhile the internal volume ratio of the compressor is larger.

The invention discloses an exhaust device. The exhaust device comprises a shell, a pressure balance ball and a support, wherein a first cavity and a second cavity separated from each other are formed in the shell; a first air inlet and a first air outlet communicating with the first cavity, and a second air inlet and a second air outlet communicating with the second cavity are formed in the shell; a third cavity and a fourth cavity which are separated from each other are formed in the pressure balance ball, one part of the pressure balance ball is placed in the first cavity and provided with a third air inlet and a third air outlet which are in communication with the third cavity, the third air inlet communicates with the first air inlet, and the third air outlet communicates with the first air outlet; the other part of the pressure balance ball is placed in the second cavity and provided with a fourth air inlet and a fourth air outlet which are in communication with the fourth cavity, the fourth air inlet communicates with the second air inlet, and the fourth air outlet communicates with the second air outlet; and the support is used for supporting the pressure balance ball. According to the exhaust device, the pressure pulse and exhaust velocity of engine exhaust can be effectively reduced, and exhaust damping can be achieved.