63 results about "Pressure tuning" patented technology

The invention relates to a method of actively adjusting the balanced discharging of parallel connection tanks of a satellite two component propelling system. A simulation model of a propelling system is firstly established; the current system mixing ratio r0 is calculated according to the current system state data; then the pressure difference dpo1 of oxidant tanks (MON-A and MON-B) and the pressure difference dpf1 of incendiary agent tanks (MMH-A and MMH-B) are calculated through an optimization algorithm according to the target value of the balanced discharging of the parallel connection tanks; the target pressure of each tank is finally calculated through the optimization algorithm by taking the r0 as the target value and the dpo1 and dpf1 as the initial conditions; and the pressure of the tanks can be adjusted to the target pressure point by utilizing gas bypasses when a satellite is in orbit, so that not only is the balanced discharging of the parallel connection tanks adjusted, but also the system mixing ratio is not influenced.

The invention relates to a method and a device for testing the thermal physical property of a solid material with an independent probe by using a harmonic method. The device comprises the independent probe, a pressure adjusting part, a torque measuring part and a harmonic measuring unit, wherein the independent probe is positioned between two identical samples to be tested to form a sandwich structure and is arranged parallel to a sample fixing table; the pressure adjusting part is positioned and pressed on the upper end face of the first sample to be tested; the sandwich structure is arranged on the sample fixing table; the torque measuring part is sleeved on one end of the pressure adjusting part; the harmonic measuring unit is electrically connected with the independent probe; and a torsion value and contact thermal resistance between the independent probe and the two samples to be tested are fitted and calculated according to a harmonic measurement principle. In the test, the sandwich structure is arranged on a lug boss of the sample fixing table, the pressure adjusting part is adjusted until the torsion value is displayed to be the optimal torsion value, and then the thermal conductivity coefficient and the thermal diffusivity of the sample to be tested are tested by the harmonic method. Differences among thermal conductivity values of the samples to be tested under the condition of a plurality of torsion values smaller than the optimal torsion value are measured and calculated for obtaining the contact thermal resistances between the samples to be tested and the independent probe under the condition of the plurality of torsion values.

The invention provides an adaptive pressure testing method and device. The method comprises the following steps: concurrently sending a preset number of requests to a server in a system under test; detecting a plurality of performance indexes of the server; building a pressure testing model of the system under test according to the number of the requests and the performance indexes; and adjusting the number of the concurrently-sent requests according to the pressure testing model of the system under test until the pressure of the system under test reaches an extreme value, and outputting the number of the concurrently-sent requests at the moment to serve as a pressure testing result. The device comprises a request concurrent sending unit, a performance detection unit, a model building unit and a pressure adjusting unit. Through adoption of the method and the device, a pressure testing process can be effectively simplified, and the labor cost is lowered.

A sample separation apparatus (200) for separating a fluidic sample, the sample separation apparatus (200) comprising a first separation unit (204) for separating the fluidic sample, a first fluid drive (202) configured for conducting the fluidic sample to be separated through the first separation unit (204), a second separation unit (208), arranged downstream of the first separation unit (204), for further separating the fluidic sample after treatment by the first separation unit (204), a second fluid drive (206) configured for at least partially conducting the fluidic sample, after treatment by the first separation unit (204), through the second separation unit (208), and a fluidic valve (218) having fluidic interfaces (222, 224, 226, 228) fluidically coupled to the first fluid drive (202) and the second fluid drive (206) and being switchable for performing the separation of the fluidic sample, wherein the sample separation apparatus (200) is configured for adjusting a pressure at a predefined position to a predefined value, wherein the predefined position is in a fluidic path between an outlet (270) of the first separation unit (204) and an inlet (272) of the second separation unit (208) or in fluid communication with this fluidic path.

The invention discloses a constant-pressure ultrasonic auxiliary excircle grinding device of adhesive grinding materials, comprising a rack, an ultrasonic vibration acoustic system and a grinding pressure tuning mechanism, wherein the rack comprises a bottom plate which is provided with a vertical plate; the middle of the vertical plate is provided with a square groove; the ultrasonic vibration acoustic system comprises a conical variable-amplitude rod; the top of the variable-amplitude rod is connected with a transducer which is connected with an ultrasonic generator, and the bottom of the variable-amplitude rod is provided with a bending vibrating rod; the lower part of the bending vibrating rod is connected with a grinding tool; the grinding pressure tuning mechanism comprises a lead screw arranged at the upper part of the vertical plate; a square nut is arranged on the lead screw and is matched with the square groove in the middle of the vertical plate for guiding the direction; a sliding block is arranged on the lead screw at the lower part of the square nut; the upper part and the lower part of the lead screw on and below the sliding block are respectively provided with an upper spring and a lower spring; the sliding block is fixedly connected with a sliding plate which is connected with the vertical plate in a sliding manner; a supporting flange is fixedly connected on the sliding plate; and the variable-amplitude rod penetrates through the supporting flange and is fixedly connected with the supporting flange. In the constant-pressure ultrasonic auxiliary excircle grinding device, the adjustment is convenient, the processing accuracy is high and the efficiency is high.

The invention provides a pulse dynamic image information detecting device, aiming at synchronously detecting the pulse information of the cun part, the guan part and the chi part during pulsing under the different pulse-taking pressures at the cun part, the guan part and the chi part. A slide block (18) is arranged at the upper part of a vertical axis (19), a Z-axis coarse-tuning knob (16) is arranged on a ring (27) at the lower part of the slide block (18), a Y-axis tuning knob (17) is arranged in the middle of the slide block (18), and one end of an X-axis tuning slide block (6) is arranged on the slide block (18) which is opposite to the Z-axis coarse-tuning knob (16) by a Z-axis fine-tuning knob (20); the other end of the X-axis tuning slide block (6) is in parallel with the horizontal plane and is provided with a groove, one end of an elastic bridge arm (7) is respectively arranged in the groove by a pulse-taking pressure tuning knob (5), and the other end of the elastic bridge arm (7) is respectably provided with a detecting contact head (9); one end of a sensor bracket (4) is arranged on the X-axis tuning slide block (6), and the other end of the sensor bracket (4) is provided with a CCD (charge coupled device) sensor (3); and the detecting contact head (9) is a cylindrical component with a seal cavity (21), a cylindrical wall of the detecting contact head (9) is provided with an air inlet (10), the upper end of the detecting contact head (9) is sealed by a photo-permeable glass piece (8), the lower end of the detecting contact head (9) is sealed by a silica gel film (14) with grid texture, a light source (11) is arranged in the middle of the cylindrical wall of the detecting contact head (9), the seal cavity (21) is connected with an air pressure cushion cavity (26) by an air pipe (24), the air pressure cushion cavity (26) is connected with a pressure gauge (23) by the air pipe.

The invention provides a vacuum processing device for regulating pressure in a high precision, and vacuum processing method and storage medium. A processing container (20)in which a vacuum processing for something to be processed is performed is communicated with eight exhaust pipes (51), vacuum exhaust unit (52) is communicated with another end of the eight exhaust pipes(51), the processing container is configured for matching with four exhaust pipes (51)of the eight; based on pressure detection value and pressure set value, pressure control valve AV for controlling opening of the automatic control exhaust pipe (51) is matching with exhaust pipes (51) other than exhaust pipes (51) providing with the pressure control valve AV, gate valve GV is set to selected opening of exhaust pipes (51).

The invention relates to multifunctional heating pressurized extraction-trapping-chromatographic separation on-line combined equipment. The multifunctional heating pressurized extraction-trapping-chromatographic separation on-line combined equipment comprises four chromatographic pumps, three three-way mixers, two six-way switching valves, a heating pressurized extraction unit, a trapping column, a chromatographic column, a detector and the like. Through combined use of an on-line trapping-desorption-switching device and an extraction-chromatographic separation device, switching of the two high-pressure six-way switching valves and pressure adjustment of a back pressure regulator are controlled, the two extraction modes, including supercritical fluid extraction and accelerated solvent extraction, and the two chromatographic techniques, including supercritical fluid chromatography and high performance liquid chromatography, can be freely combined for use, functional diversity of the equipment is improved, and the multifunctional heating pressurized extraction-trapping-chromatographic separation on-line combined equipment can be effectively used for on-line extraction, trapping, desorption, separation and detection of trace objects in such complicated solid or semi-solid samples as environments, food, medicines and biology.

The invention relates to a method for automatically testing and recording a rated value for an SF6 gas density relay and includes a checking apparatus. The checking apparatus includes a gas source supplying mechanism with adjustable pressure, at least one pressure sensor, a temperature sensor, a computer data processing system and a display screen. The computer data processing system is provided with a relay action signal input port. The method includes the following steps: step 1, the indicating value of a test product is observed according to a pointer of the test product and the pressure is regulated just to a rated value of the test product, namely the pointer of the test product just points at the rated value Pe; step 2, a command key is tested according to the rated value; the checking apparatus automatically records a pressure value P and a temperature value T of the current pressure sensor and the temperature sensor; step 3, corresponding pressure value Pe test is converted automatically at 20 DEG C according to the pressure-temperature characteristic relation of the SF6 gas; step 4, the checking apparatus automatically carries out correcting on the tested Pe test according to the linear relation of the pressure sensor and the temperature sensor and stores the test result.

The invention discloses a nuclear magnetic high-pressure isothermal adsorption device. The nuclear magnetic high-pressure isothermal adsorption device comprises an air supply system, a pressure adjusting system, an isothermal balance system and a nonmagnetic nuclear magnetic cavity testing system, wherein the air supply system is used for supplying first gas and second gas; the pressure adjusting system is used for adjusting the pressure of the first gas and the pressure of the second gas; the isothermal balance system is used for utilizing the first gas to carry out an air tightness test at a preset temperature, vacuumizing a part of the first gas after the air tightness test and then receiving the second gas so as to balance the pressure and the temperature of the first gas and the pressure and the temperature of the second gas; the nonmagnetic nuclear magnetic cavity testing system is used for carrying out nuclear magnetic resonance on the first gas and the second gas after the pressures and the temperatures are balanced to test the adsorbing capacity of gas. The nuclear magnetic high-pressure isothermal adsorption device aims to solve the problems, in the prior art, that an experiment measuring area is deeply influenced by a room temperature environment, the temperature fluctuation is great, the test result is unstable and the experimental accuracy is poor and the problem that an existing isothermal adsorption experiment measuring tank is incapable of being used for measuring nuclear magnetic resonance.

The invention discloses a liquid level control display instrument and a using method thereof, and relates to liquid level display technology. The structural relation of the instrument is that: a gauge head is fixed on a fixing frame; one end of a lever of the gauge head is connected with an inner core of the gauge head, while the other end is connected with a transmission rod; a pressure adjustment spring is sleeved on the transmission rod and is positioned above a connecting body; the upper end surface of a pressure adjustment cap passes through the transmission rod and is sleeved outside the transmission rod and the pressure adjustment spring; the outside of the pressure adjustment cap is provided with an adjusting cavity; the lower end of the transmission rod is connected with an air bag through the connecting body; and the air bag and a gauge pipe are connected through an air transmission pipe; one end of a stroke opening/closing sheet is fixed on a normal contact, while the other end is positioned on a contact; one end of the stroke opening/closing sheet is integrated, and the middle part of the other end of the stroke opening/closing sheet is connected by a closed spring; and a vertical spring is arranged beside the adjusting cavity; the lower end of the vertical spring is fixed on the fixing frame; the upper end of the vertical spring is fixed in the middle of a pressure adjustment lever; one end of the pressure adjustment lever is fixed on the fixing frame; the other end of the pressure adjustment lever is positioned on tine of an eccentric wheel; and the eccentric wheel is connected to an eccentric wheel seat.

The invention discloses a one-dimensional simulation device of a development simulation experiment apparatus for natural gas hydrate. The device comprises a core simulation cavity and a displacement pressure supply chamber. High-pressure bushings are arranged on the inner wall of the core simulation cavity. The interior of the core simulation cavity is divided into a displacement chamber and a pneumatic pressure floating chamber through a floating inner piston. A core holder is installed inside the displacement chamber through a compensating core barrel. An open temperature maintenance deviceand a pneumatic pressure compensation device are arranged on side surfaces of the displacement chamber and the pneumatic pressure floating chamber respectively. Two pressure control tubes are arrangedat the top of the displacement chamber and are provided with compression valves and extension valves respectively. A damping tube is arranged between the two pressure control tubes. According to theone-dimensional simulation device of the development simulation experiment apparatus of the natural gas hydrate, more intuitive data is obtained through test, and through the open temperature controland the self-pressure adjustment, the temperature and pressure are always in a dynamic balance when passing a model test, so that the actual environment can be better simulated, and the testing effectis more accurate.

The invention provides a device and a method for correcting an acoustic logging tool through indoor frequency dispersion analysis. The method comprises the following steps: 1, mounting a centering device according to the design; 2, pushing the instrument sequentially from bottom to top joint by joint into a testing tube from one end provided with a jack; 3, mounting an upper plug and a lower plug;4, mounting a valve, a water pipe and a pressurizing pump; 5, injecting water and pressurizing, and regulating the pressure to 30kg; 6, connecting the instrument, switching on the instrument, and acquiring the data by using a dedicated acquisition system; 7, analyzing data, processing a correction value, and storing into a dynamic library; and 8, transferring logging data to an explanation centerwhen the instrument is logged and used, and directly correcting the data during processing. The device and the method for correcting an acoustic logging tool through indoor frequency dispersion analysis disclosed by the invention have the advantages that a testing instrument is corrected, the equipment performance is stable, a structure is simple, the device is convenient to transport, the manufacturing cost is low, maintenance is convenient, correction software is implanted into the dynamic library of the instrument, and the method can be applied to all acoustic amplitude measurement.

Improved methods for conducting solid acid-catalyzed, near- or supercritical heterogeneous chemical reactions (e.g., alkylation reactions) are provided which give enhanced product yields and permit longer processing runs. The preferred reactions of the invention are carried out in the presence of a solid macroporous catalyst having a surface area of from about 50-400 m²/g and a pore size of from about 70-150 Å. Product selectivity is enhanced by pressure-tuning of the reaction to promote production and separation of desired reaction products. In continuous processing, the chemical reaction may be interrupted before significant catalyst deactivation, followed by increasing reactor pressure and/or reducing reactor temperature to remove the accumulating coke; when the catalyst is regenerated, the original reaction conditions and reactant introduction may be resumed.

The present invention relates to an injection device comprising a fuel pump (20a), a pressure regulator (20b), an injector (20c) and an air adjuster (20d), characterized in that the fuel pump (20a), the injector (20c) and the air adjuster (20d) are integral components of an injection module (2), the pressure regulator (20b) is an integral component of the injector (20c) and the injection device comprises an intake chamber (30) which is an integral component of the injection module (2) and which is connected to a pump chamber (31) of the fuel pump by way of a first check valve (33), wherein a volume of the pump chamber (31) is smaller than a volume of the intake chamber (30) and wherein the intake chamber (30) comprises a gas-filled area (30a) and a fuel area (30b) for damping an intake pulsation in the intake chamber (30).

A dielectric filter with a low-pressure high-power threshold value comprises a filter cavity, an upper cover board, a pressing force adjusting screw, a metal pressing block, a thin cover board, a dielectric resonator, a frequency tuning screw, a locating dielectric block, a welding rod, a connector and a fastening screw. The adjusting structure of the pressing force adjusting screw, the upper cover board, the metal pressing block and the thin cover board is designed, the dielectric resonator is placed between a cavity limiting pit and the thin cover board, the dielectric resonator, the thin cover board and the cavity make good contact in different temperature, mechanics and vacuum environments through adjustment of a pressure tuning screw, and it is guaranteed that the working performance of the TM01 mode dielectric filter is reliable and stable in different environments. The mode that the locating dielectric block and a dielectric tuning screw are combined is adopted, an electromagnetic field in the dielectric resonator is slightly disturbed, and compared with a tuning screw made of metal, the low-pressure power threshold value of the filter is obviously increased.

The invention relates to an emulsification detonator charging trolley, including a working main arm hydraulic pressure control system and an emulsification detonator charging system, wherein the working main arm hydraulic pressure control system includes a hydraulic pressure gear pump, a scale valve set, an operation valve set, a safety valve and a hydraulic pressure meter. The hydraulic pressure gear pump builds a pressure oul feeding hydraulic pressure system; the scale valve set is arranged on the frame which hydraulically or manually operates the working main arm and performs the flux distribution and pressure adjustment to the hydraulic pressure oil; the operation valve set is arranged on the working nacelle which mainly uses the leading oil pressure control scale valve to operate the working main arm. The grain detonator charging trolley is changed into the emulsification detonator charging trolley, which solves the idle problem of the NT30/NBB 150 charging trolley with low cost, to be used again.

The invention discloses a test device for accurately measuring a static friction coefficient. The test device comprises a pressure loading assembly, a pressure sensor, a pressure adjusting assembly, a rolling bearing pair assembly, a temperature adjusting assembly, a thrust loading assembly, a thrust sensor, a thrust adjusting assembly and a base. The upper end of the pressure sensor is connected with the pressure loading assembly, and the lower end is connected with the pressure adjusting assembly; the lower end of the pressure adjusting assembly is connected with the rolling bearing pair assembly; a contact surface is formed between the rolling bearing pair assembly and the temperature adjusting assembly; the left end of the thrust sensor is connected with the thrust adjusting assembly, and the right end of the thrust sensor is connected with the thrust loading assembly; and all the assembliesare integrally mounted on the base. The device is convenient to operate, and can accurately measure the static friction coefficient between the contact surfaces of two objects under different temperature conditions.

The invention provides a pressure sensor calibration method and device and electronic equipment, and the method comprises the steps: obtaining the to-be-calibrated pressure data of a target pressure sensor at the current temperature if a data obtaining instruction of the pressure sensor is received; preprocessing the to-be-calibrated pressure data to obtain a real-time normal-temperature pressure coefficient of the target pressure sensor for pressure calibration; inputting the real-time normal-temperature pressure coefficient into a preset pressure sensor calibration model, and determining a simulated high-temperature pressure coefficient and a simulated low-temperature pressure coefficient corresponding to the real-time normal-temperature pressure coefficient; and determining calibrated pressure data of the target pressure sensor according to the real-time normal-temperature pressure coefficient, the simulated high-temperature pressure coefficient and the simulated low-temperature pressure coefficient. According to the method, pressure calibration is realized through the full-temperature-zone pressure adjustment coefficient, so that the calibration precision of the pressure sensor is improved.

A fuel cap easily realizes a function to warn the user that the pressure regulating valve is activated as backup means for the fuel tank pressure adjustment mechanism. The fuel cap includes a negative pressure valve that regulates the fuel tank pressure. An alarm mechanism is disposed upstream from the negative pressure valve. The alarm mechanism issues a warning that the negative pressure valve of the pressure regulating valve is activated as a backup for the fuel tank pressure adjustment mechanism by emitting sound via a whistle mechanism when air flow takes place due to the opening of the negative pressure valve.

The invention discloses an energy-saving control system based on a roots vacuum pump, and relates to the technical field of vacuum pumps. The energy-saving control system comprises a pressure sensor, a pressure adjusting module, a temperature sensor, a temperature adjusting module, an operation monitoring module and an alarm module; the pressure sensor is used for collecting the pressure of an exhaust port of the vacuum pump in real time, and the pressure adjusting module is used for controlling a corresponding overflow electromagnetic valve to be opened according to the pressure difference between the current pressure and a set value and adjusting the ratio of the power to the pressure difference of the vacuum pump to enable the power to be matched with the pressure difference to reach a balance point to ensure that the vacuum pump works under rated working current, so that overload phenomenon is avoided; and the temperature adjusting module is used for automatically controlling the temperature of cooling water flowing through the vacuum pump from a condenser, the mode that the temperatures are controlled to be different in the different internal and external temperature difference interval is adopted, the cooling heat dissipation speed of the vacuum pump in the high-load time period is increased, and energy consumption of the vacuum pump in the low-load time period is reduced, so that purposes of saving energy and improving the working efficiency of the vacuum pump are achieved.

The invention relates to an electronic stethoscope based on Bluetooth. The electronic stethoscope comprises a metal face shell, a Bluetooth module and Bluetooth sound listening equipment. A vibrating diaphragm is arranged on the bottom face of the metal face shell, the metal face shell is provided with a cavity, a sound pick-up based on Bluetooth communication is installed in the cavity, and the sound pick-up is in wireless communication with Bluetooth sound listening equipment. The electronic stethoscope based on the Bluetooth is characterized in that a pressure adjusting device is further arranged in the cavity, and the pressure adjusting device can adjust the contact area of the vibrating diaphragm and the human body and can feed back an adjusting result to an operator in time through the Bluetooth sound listening equipment.