The present invention discloses a seal and impact test system for a circular rusted pressurizing pipeline and an experimental method. The test system comprises a rusted test pipeline, a supporting seat assembly, a pressurizing assembly, a sealing assembly, a falling hammer impact assembly, a data acquisition assembly and the like; the rusted test pipeline is fixed on the supporting seat assembly; the sealing assembly comprises a pressurizing end sealing assembly and a measurement end sealing assembly; the pressurizing assembly is connected with one end of the rusted test pipeline through the pressurizing end sealing assembly, so that the pressurizing assembly and the one end of the rusted test pipeline can form an integrated body; and the data acquisition assembly is connected with the other end of the rusted test pipeline through the measurement end sealing assembly, so that the data acquisition assembly and the other end of the rusted test pipeline can form an integrated body. With the seal and impact test system adopted, an external surface-rusted pipeline can be plugged and pressurized fast, the collapse of local sections which is caused by the unevenness of radial compressive stress of sealed portions of the end portions of the rusted test pipeline can be effectively avoided, and the volume and shape change of the pipeline can be detected through detecting the change amount of the internal pressure intensity of the pipeline in real time. A rusted pipeline impact experiment based on the system can provide technical support for rusted pipeline performance tests.

Seal and impact test system for circular rusted pressurizing pipeline and experimental method

The invention discloses a calibration method for a force sensor. The calibration method comprises the steps that S1, a standard force sensor and the to-be-calibrated force sensor are arranged on the two sides of a hydraulic actuator correspondingly and configured to enable the magnitude of borne force applied by the hydraulic actuator to be the same; S2, the hydraulic actuator is controlled to conduct continuous actuation according to the designated applied force change trend, so that the standard force sensor and the to-be-calibrated force sensor bear the continuously-changed applied force; S3, the magnitude of the force borne by the standard force sensor in all applied force states is obtained, and the magnitude of the force borne by the to-be-calibrated force sensor in all the applied force states is obtained according to the calibration relation corresponding to the standard force sensor; and S4, the corresponding relation between input and digital quantity output of the force borne by the to-be-calibrated force sensor is established according to the calculated magnitude of the force borne by the to-be-calibrated force sensor in all the applied force states. The calibration method has the advantages of easy operation, low required cost, flexible application, high calibration efficiency, high precision and the like.

Calibration method for force sensor

The invention provides a liquid oxygen conveying pipe vibration test device and a test method thereof. The liquid oxygen conveying pipe is roughly a Y-shaped three-way pipe and has a first end, a second end and a third end, wherein the first end is fixedly connected to an upper support frame, and the upper support frame is fixedly connected below a top beam of a portal frame; the second end is fixedly connected with a tool, and the tool is fixedly connected on a vibration table; and the third end is fixedly connected to a side support frame, and the side support frame is fixedly connected to aside arm of the portable frame. The tool is elastically connected to the portal frame in the horizontal direction and the vertical direction by a suspension system. A low-temperature loading balancesystem conveys a low-temperature fluid medium to the liquid oxygen conveying pipe and keeps the pressure balance in the liquid oxygen conveying pipe. The liquid oxygen conveying pipe vibration test device can apply a low-temperature, high-pressure and high-magnitude vibration composite environmental load to a large-inner diameter liquid oxygen conveying pipe safely and effectively, and effectivelysimulate complex working conditions of the liquid oxygen conveying pipe in the process of flying on a rocket.

Liquid oxygen conveying pipe vibration test device and test method thereof

The invention provides a two-way brake actuator output force measurement calibration device and relates to the field of design of brake actuators. The device comprises a brake actuator, a support sleeve, two ball cap assembles, two S-shaped load cells, four guide strips and a base; the base is of a horizontally placed platy structure; the support sleeve is vertically and fixedly mounted at the center of the upper surface of the base in the axial direction; every two guide strips serve as a group, and the four guide strips are symmetrically mounted on both sides of the support sleeve and fixedly mounted on the upper surface of the base; the two S-shaped load cells are symmetrically disposed on both sides of the support sleeve, and each S-shaped load cell is sandwiched between the two corresponding guide strips in the corresponding guide strip group; the two ball cap assemblies are fixedly mounted on the tops of the two S-type load cells respectively; the brake actuator is mounted on thetop of the support sleeve. According to the device, the safety of the brake actuator to be tested and the accuracy of output force calibration are ensured, and meanwhile the calibration efficiency istaken into account.

Two-way brake actuator output force measurement calibration device

The invention discloses a low-temperature pressure hysteresis test device for a clamp The low-temperature pressure hysteresis test device comprises a gas source (1); the gas source (1) is connected with a buffer exhaust module (40); a clamp (20) requiring mechanics property detection is just arranged in front of the exhaust port of the buffer exhaust module (40); a low-temperature pressure sensor (19) is arranged between the clamp (20) and the exhaust port of a second low-temperature two-position two-way normally-closed solenoid valve (142); and the clamp is provided with a low-temperature force sensor (21) With the low-temperature pressure hysteresis test device for the clamp adopted, a testing operator can conveniently and reliably detect the mechanical property of the clamp at low temperature, test operation is convenient and fast, and the detection quality and efficiency of the clamp can be improved The wide protection application of the low-temperature pressure hysteresis test device can be facilitated The low-temperature pressure hysteresis test device is of great significance for production practice

Low-temperature pressure hysteresis test device for clamp

The invention discloses a low temperature force sensor performance verification device. The low temperature force sensor performance verification device comprises a fixation frame and a monitoring unit, wherein a hydraulic actuator is fixedly arranged on the inner side surface of the top of the fixation frame; an output shaft at the bottom of the hydraulic actuator is connected to a standard force sensor; the bottom of the standard force sensor is connected to a loading plate; a low temperature storage box with an opening on the top is arranged below the loading plate; a low temperature force sensor is arranged in the low temperature storage box and is located directly below the loading plate; a plurality of temperature sensors are uniformly distributed on the outer surface of the low temperature force sensor; and the monitoring unit is in electrical signal connection with the standard force sensor, the low temperature force sensor and the temperature sensors respectively. The low-temperature force sensor performance verification device is simple in structure, convenient to control, easy to install and maintain and low in detection cost, is capable of accurately, reliably and efficiently detecting the mechanical property of the low temperature force sensor in a low temperature environment, and is suitable for wide popularization and application.

Low temperature force sensor performance verification device

The utility model discloses a sluggish test device of low temperature pressure of clamp, including air supply (1), air supply (1) is connected with a buffering exhaust module (40), the gas vent dead ahead of buffering exhaust module (40) is provided with clamp (20) that need carry out mechanical properties and detect, the clamp (20) and be provided with low temperature pressure sensor (19) between second low temperature two for two normally -closed solenoid valves's (142) the gas vent, install on the clamp (20) one low temperature force transducer (21). The utility model discloses a sluggish test device of low temperature pressure of clamp, its can let experimental operating personnel convenient, detect at low temperature mechanical properties down the clamp reliably, experimental convenient operation, swift improves the detection quality and the efficiency of clinching, is favorable to extensive production application, has great production practices meaning.

Sluggish test device of low temperature pressure of clamp

The utility model discloses a low temperature hydraulic pressure collision test system for the inspection accumulator bears the strength property of big magnitude hydraulic shock under the low temperature circumstances, this system mainly forms by falling bounce table, support, bellows pressure chamber, heat preservation system, pressure monitoring unit etc And the pressure chamber is separated for exocoel and inner chamber by a bellows, the exocoel part and the glass steel hub connection of this pressure chamber, and this exocoel directly soaks in the heat preservation system that is full of the liquid nitrogen, the inner chamber is full of the liquid nitrogen to communicate with the accumulator The utility model discloses utilize bounce table cooperation bellows to realize the impact under the low temperature medium to through the effectual gasification phenomenon of liquid nitrogen in the pipeline of having solved of simple method, simulated real operating mode, can realize the anti collision test of low temperature of accumulator effectively, and the accurate set pressure impact amplitudes of working parameter such as accessible settlement bounce table height and band -type brake time, thereby satisfy different test demands

Low temperature hydraulic pressure collision test system

The invention discloses a low-temperature hydraulic impact test method. The method is used for testing a strength characteristic of an accumulator bearing a lot of hydraulic impact under a low temperature condition and the method is realized mainly based on a low-temperature hydraulic impact test system. The system is mainly formed by a falling impact bench, a support, a corrugated pipe pressure chamber, a thermal insulation system, a pressure monitoring unit and the like. The pressure chamber is divided into an external cavity and an internal cavity by one corrugated pipe. An external cavity portion of the pressure chamber is connected to a glass steel shaft. The external cavity is directly immersed into the thermal insulation system which is filled with liquid nitrogen. The internal cavity is filled with the liquid nitrogen and is connected to the accumulator. In the invention, the impact bench is cooperated with the corrugated pipe so that impact under a low temperature medium is realized; through a simple method, a gasification phenomenon of the liquid nitrogen in a pipeline is effectively solved; a real condition is simulated and a low-temperature impact resistance test of the accumulator can be effectively realized; through setting work parameters of an impact bench height, internal contracting brake time and the like, a pressure impact amplitude is accurately set so that different test demands are satisfied.

Low-temperature hydraulic impact test method

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