3results about How to "Wide working pressure range" patented technology

The invention discloses an air cylinder end cover structure and an air cylinder, and the air cylinder end cover structure comprises an air cylinder end cover which is mounted at the end part of the air cylinder; the moving assembly penetrates through the air cylinder end cover in a sliding and sealing mode. And the adjusting unit is arranged on the air cylinder end cover and used for adjusting the axial displacement of the moving assembly. According to the designed air cylinder end cover structure, the clearance volume of the air cylinder is adjusted through movement of the moving assembly in the air cylinder end cover, then the pressure ratio of the air cylinder is changed, distribution of the pressure ratio of the air cylinder of a two-stage or multi-stage compression hydraulic drive piston compressor is achieved, and the working pressure range of the hydraulic drive piston compressor is widened.

The invention belongs to the technical field of pulse wind tunnel tests, and discloses a fast-response piezoelectric high-voltage sensor of a pulse wind tunnel and an assembly and installation method thereof. The outer layer of the sensor comprises a shell, an upper pressure-bearing seat and a lower pressure-bearing seat which are sequentially connected from top to bottom, a diaphragm is clamped at the top end, a force transmission block, an upper crystal plate, a conductive disc, a lower crystal plate, an insulating tube, an upper insulating seat and a lower insulating seat are sequentially arranged in an inner cavity from top to bottom, and a lead of the conductive disc penetrates through a central through hole of the sensor and is connected to the top of a contact pin. The assembling method comprises the steps of welding conductive disc leads; and the upper pressure-bearing seat, the lower pressure-bearing seat, the conductive disc, the lower crystal plate, the force transmission block, the upper crystal plate, the inner sleeve, the shell, the upper pressure-bearing seat, the lower pressure-bearing seat and the contact pin are sequentially assembled. The mounting method comprises the steps of machining external threads; installing a metal sealing ring; and installing and fixing the fast-response piezoelectric high-voltage sensor. The sensor is fast in response time, high in sensitivity, high in measurement precision, wide in working pressure range and small in environmental influence; the assembly method and the installation method are simple and reliable.

This invention belongs to the field of high-pressure fluid jet control technology, and particularly relates to a pressure stabilizing device and jetting method based on supercritical carbon dioxide high-pressure jet. It includes a carbon dioxide storage cylinder, a cold bath connected to the outlet of the carbon dioxide storage cylinder, a cold bath outlet connected to a liquid carbon dioxide storage tank, a storage tank outlet connected to a booster pump inlet, a booster pump outlet connected to a hot bath, and a hot bath outlet connected to a jet pressure stabilizer. One end of the jet pressure stabilizer has a nitrogen inlet pipeline, and the other end has a high-pressure supercritical carbon dioxide outlet pipeline. The high-pressure supercritical carbon dioxide outlet pipeline is connected to the jetting system. The jetting system also includes an impact force characteristic testing component. This invention solves the problems of low operating efficiency, poor cutting effect, and difficulty in accurately controlling the fluid jetting process caused by fluid pressure fluctuations and sudden drops in engineering. This pressure stabilization method is simple, easy to implement, and convenient to control, and has broad application prospects.