5results about How to "Achieve pressure control" patented technology

The utility model discloses a biscuit packaging quality detection device which comprises a detection table and further comprises a detection assembly arranged on the detection table and used for detecting the sealing state of biscuit packaging, and the detection assembly is provided with a control assembly for pressure control in the detection process. According to the biscuit package quality detection device, in the process of detecting the sealing quality of the biscuit package, the biscuit package to be detected is extruded and subjected to pressure maintaining treatment through the detection assembly and the control assembly, whether the sealing quality of the biscuit package is qualified or not is judged, and in the pressurizing process, the biscuit package is subjected to pressure maintaining treatment; when the internal pressure of the detection cylinder rises to a certain degree, the internal pressure does not continue to rise, so that pressure control in the detection process is realized, and the pressurization pressure in the detection process is ensured and the detection effect is ensured while the to-be-detected biscuit package is prevented from being extruded and damaged due to overlarge pressurization pressure.

The invention provides a full-size low-temperature medium outflow test system and an outflow test method. The system comprises a control system, an end socket, a storage tank, a conveying main pipeline, a pressure accumulator, a discharge pipeline, a filling pipeline, an air sealing pipeline, a pressurizing pipeline, a pressurizing tank, a liquid nitrogen filling tank car, a flow meter, a filling port, a regulating valve, a stop valve and an air sealing port. According to the system, a full-size test platform is built, low-temperature liquid nitrogen is used for replacing a low-temperature propellant, the working states of the pressurized conveying system under different flows and pressures are simulated, and the requirement that the system obtains the flowing performance closer to the real working condition through test examination under a low-temperature medium is met.

An air bearing assembly comprises a main shaft, the periphery of the main shaft is sleeved with a thrust plate and a shaft sleeve, a thrust piece is arranged between the thrust plate and a bearing shell, the bearing shell is arranged on the periphery of the shaft sleeve, a bearing seat is arranged on the periphery of the bearing shell, and a first air channel for providing radial loads is arranged between the shaft sleeve and the main shaft. A second air channel for providing axial load is arranged between the thrust plate and the side face of the bearing shell, and a displacement sensor for sensing the position of the thrust plate is arranged on the side face of the bearing shell. According to the air bearing assembly, the gap between the thrust plate and the thrust piece is detected through the displacement sensor, so that the air pressure of the first air channel and the air pressure of the second air channel are adjusted, and the high-speed and stable rotating performance of the air bearing assembly is improved.

The utility model relates to gas storage equipment technical field especially relates to a kind of gas storage system, it includes: double-layer gas storage membrane, membrane pressing device, fastening device, air inlet device and exhaust device.Double-layer gas storage membrane includes: inner layer membrane and outer layer membrane two parts.Outer layer membrane is located the outside of inner layer membrane, and air inlet and exhaust are equipped on outer layer membrane.Membrane pressing device is located the outside of double-layer gas storage membrane, and membrane pressing device has assembly hole on it;Fastening device passes through the assembly hole of membrane pressing device, to be fixed in mounting surface by membrane pressing device with double-layer gas storage membrane;Exhaust device and air inlet device cooperate and adjust the pressure between inner layer membrane and outer layer membrane.The utility model relates to a kind of gas storage system, by the cooperation of air inlet device and exhaust device, realize the pressure regulation and control between inner layer membrane and outer layer membrane, protect outer layer membrane;Membrane pressing device and fastening device are cooperated, realize its fixed on mounting surface, replace the fixing mode of installation embedded part in prior art, save construction period, reduce cost.

The present invention relates to a reaction chamber vacuum control system and method and a pressure control valve used therein, and relates to semiconductor equipment. The pressure control valve is improved from a single fan-shaped opening valve to a design of multiple grid-shaped blades, and the movement direction is improved from horizontal opening to a mode in which every two adjacent grid-shaped blades rotate in opposite directions to open, thereby achieving symmetry in the direction of exhaustion, realizing pressure control, improving the uniformity of plasma in the reaction chamber, and improving the uniformity and symmetry of chamber etching.