30results about How to "Short transition" patented technology

Provided is a dye-sensitized solar cell including a flexible electrode. The dye-sensitized solar cell includes: first and second electrodes facing each other, and an electrolyte layer interposed between the first and second electrodes, wherein the first electrode comprises a structure formed of conductive fibers, a nano-particle semiconductor oxide layer formed on a surface of the structure of the conductive fibers, and dye molecules adsorbed in the nano-particle semiconductor oxide layer.

The invention discloses an engine exhaust manifold assembly. The front end mouth portion of each exhaust manifold is extended and is mounted at intervals on an air inlet flange, a three-way catalyst is cylindrical, the back end of each exhaust manifold is gathered together and connected with the front end of the three-way catalyst through a horn-shaped transition tube, the inner diameter of the horn-shaped transition tube is gradually increased from the front end to the back end, the air inlet flange is a casting part and is sleeved at the back end of the three-way catalyst, an included angle alpha of 20-80 degrees is formed between the front end face and the back end face of the air inlet flange, the inner diameter of the air inlet flange is gradually decreased from the front end to the back end, the back end of the three-way catalyst is inserted into the front end mouth portion of the air inlet flange and is welded with the air inlet flange, and the back end mouth portion of the air inlet flange extends outwards to form a flange mounting plate. The engine exhaust manifold assembly has the advantages of simple structure, low air discharging back pressure, good engine dynamic property, small heat loss, high cold starting property and the like, and requirements of national five emission standards can be met.

The invention discloses an energy-saving type hydraulic escalator which comprises a controller, a descending escalator part, an ascending escalator part, a first variable displacement motor, a second variable displacement motor and a reversing valve; the first variable displacement motor and the second variable displacement motor are each provided with a pump working condition and a motor working condition; the first variable displacement motor, the second variable displacement motor and the reversing valve form a hydraulic circuit; an output shaft of the first variable displacement motor is connected with a transmission shaft of the descending escalator part; an output shaft of the second variable displacement motor is connected with a transmission shaft of the ascending escalator part; when the descending speed of the descending escalator part is greater than a preset threshold, the reversing valve is positioned in a first station, an oil inlet of the reversing valve communicates with a pump working condition oil port of the first variable displacement motor, and an oil return port of the reversing valve communicates with a motor working condition oil port of the first variable displacement motor; and when the descending speed of the descending escalator part is less than a preset threshold, the reversing valve is positioned in a second station, the oil inlet of the reversing valve communicates with a motor working condition oil port of the first variable displacement motor, and the oil return port communicates with a pump working condition oil port of the first variable displacement motor. The gravitational potential energy of the descending escalator part is converted to pressure energy used for driving the ascending escalator part to operate, an energy conversion link is brief, the conversion efficiency is high, no additional space is occupied, and the cost is low.

A room temperature and low pressure test method for the sealing performance of polyethylene valves. On the premise of confirming that the valve end face is reliably sealed and the air circuit of the test bench has no leakage, the indoor air is used as the test medium, and the closed-loop control system of the test bench is used to automatically pressurize the valve test chamber and standard cylinder to the test standard pressure. Use the temperature sensor and differential pressure sensor to simultaneously detect the temperature of the valve test chamber and the test gas in the standard cylinder and the pressure difference between the two, obtain all the two-dimensional data during the pressurization test period or the period before the leakage alarm, and send it to the single-chip computer system Perform cross-correlation analysis. According to the sufficient and necessary condition of no leakage: any point on the fitting curve of the temperature difference and pressure difference of the medium on the same time axis has the same change gradient, and the temperature and pressure values ​​at any time have a single proportional relationship. The pressure drop gradient value of the valve gives the judgment of the sealing performance of the valve. This method does not require a constant temperature environment, and has the characteristics of high resolution, rapidity and high efficiency.

The present invention provides a delivery system for unmanned aerial vehicles, which includes a fixing component for suspending and fixing the unmanned aerial vehicle to be launched. The unmanned aerial vehicle includes a nose and two wings, wherein the suspension and fixing means: The fixing components are respectively connected with the nose and the two wings to form a three-point connection, and the nose is facing the ground, and the body is in a predetermined launching posture. Since the fixing assembly of the present invention is connected at three points with the unmanned aerial vehicle to be released, and the unmanned aerial vehicle is in the predetermined launching posture when it is fixed, it is easier to make it be in this posture when it is released, reducing the number of times to adjust the posture. It is beneficial for the aircraft to gain speed after release, helps the aircraft attitude to level off quickly, reduces the transition process, and ensures the safety of the aircraft. In addition, the structure of the invention is simple to realize, has high safety and reliability, and is convenient for engineering application.