8 results about "Friction sensitivity" patented technology

The present invention discloses a system for measuring the friction sensitivity of energetic materials, comprising a frame, a test structure disposed on the frame and capable of clamping a test piece, and a striking structure disposed above the test structure and used to apply a striking force to the test piece. A striking rod capable of aligning with the test piece and being transmission-connected to the striking structure is slidably disposed on the test structure. The beneficial effects of the present invention are as follows: the present solution utilizes the sliding movement of the striking rod to apply a striking force to the test piece, and can effectively control the movement accuracy of the striking rod, thereby ensuring the relative position accuracy of the striking rod and the test piece, avoiding deviations in the relative position of the striking rod and the test piece that affect the accuracy of the test; the striking rod is not directly connected to the drive structure, and can reduce the impact of vibrations generated by the drive structure itself on the accuracy of the test.

The invention discloses a preparation method of CL-20 / NTO eutectic explosive, and relates to the technical field of energetic materials, and the preparation method comprises the following steps: 1, respectively weighing CL-20 and NTO for later use; the molar ratio of CL-20 to NTO is (2-1): 1; step 2, dissolving CL-20 and NTO in a solvent, and stirring at room temperature for 30 minutes to obtain a uniformly mixed solution; step 3, carrying out spray drying on the solution in the step 2 to form a mixture of gas and CL-20 / NTO eutectic explosive particles; the gas is nitrogen; and step 4, collecting the CL-20 / NTO eutectic explosive particles prepared in the step 3. The spherical particles of the CL-20 / NTO eutectic explosive prepared by the preparation method disclosed by the invention are relatively lower in explosive sensitivity, more insensitive to outside stimulation, lower in friction sensitivity and impact sensitivity, better in safety and higher in preparation efficiency.

The invention discloses a pentazole non-metal salt safety assessment method, and belongs to the technical field of pentazole non-metal salt safety assessment, and the method comprises the following steps: S1, drying a pentazole non-metal salt sample in a drying oven; s2, measuring a 5s explosion point, vacuum stability, impact sensitivity, friction sensitivity and decomposition temperature of the pentazole nonmetal salt, and respectively calculating corresponding coefficients alpha 1, alpha 2, alpha 3, alpha 4 and alpha 5; s3, sorting alpha1-alpha5 from large to small and recording the alpha1-alpha5 as a, b, c, d and e; s4, calculating a coefficient alpha T and an eccentric distance h according to a, b, c, d and e; and S5, calculating the comprehensive sensitivity alpha of the pentazole nonmetal salt. According to the safety assessment method for the pentazole nonmetal salt, the problem that existing assessment is one-sided is solved, comprehensive assessment of the safety of the pentazole nonmetal salt is achieved, and scientific reference is provided for storage and use of the pentazole nonmetal salt.

The utility model discloses a pendulum bob lifting and releasing device which comprises an installation assembly, a pendulum bob assembly and a hook assembly, a rotation driving mechanism is horizontally and fixedly connected to the installation assembly, and a connecting piece is fixed to the output end of the rotation driving mechanism; the pendulum bob assembly comprises a swing arm with one end rotationally connected to the installation assembly and a pendulum bob fixedly connected to the other end of the swing arm. The hook assembly comprises a hook hinged to the connecting piece, a first linear driving mechanism used for pushing the hook to rotate to hook the swing arm and a second linear driving mechanism used for pushing the hook to release the swing arm, and the first linear driving mechanism and the second linear driving mechanism are both fixedly connected to the connecting piece. According to the utility model, the pendulum bob can be lifted to a certain height and then released, so that the pendulum bob can be automatically lifted and released for knocking, and the friction sensitivity can be automatically measured.

The invention discloses a force-heat coupling test device and a test method for friction sensitivity of an energetic material, and belongs to the field of safety evaluation and test of energetic materials. The device comprises a friction sensitivity tester, a thermal coupling system and a pressure control system, a sample loading assembly comprises a sliding column sleeve and a protective sleeve, and the protective sleeve is arranged on the outer side of the sliding column sleeve in a sleeving mode. An upper sliding column and a lower sliding column which are located over the punch are arranged in an inner cavity of the sliding column sleeve, and a charging cavity is reserved between the upper sliding column and the lower sliding column. The upper sliding column and the lower sliding column are detachably arranged in an inner cavity of the sliding column sleeve in a penetrating mode. The friction mechanism comprises a pendulum bob and a pendulum bob support, and an angle is engraved on the pendulum bob support and used for fixing the swing angle of the pendulum bob. The striking rod is fixed to the side end of the upper sliding column in the pressurized state. The thermal coupling system comprises a heating device and a heating coil. An accurate temperature field is applied to the energetic material, stable loading pressure is provided by adjusting the hydraulic pump, the upper sliding column is impacted by the striking rod, so that the lower surface of the upper sliding column rubs with the energetic material, and the friction sensitivity test is carried out.

The utility model discloses a sliding sleeve screw-down mechanism which comprises a frame body assembly, a guide sleeve, an ejector rod, a first linear driving mechanism, a second linear driving mechanism, an ejector column and a third linear driving mechanism. A guide groove is formed in the frame body assembly, and the guide sleeve is vertically connected into the guide groove in a sliding mode. According to the utility model, after the two sliding columns and the sliding sleeve are put into the pushing sleeve, the two sliding columns and the sliding sleeve can be pushed to a position right above the guide sleeve by the second linear driving mechanism; under the action of the first linear driving mechanism, the ejector rod can move upwards so as to enable the two sliding columns to move upwards, and meanwhile, the ejector rod can drive the guide sleeve to move upwards through the first spring so as to enable the sliding sleeve and the two sliding columns to move upwards together; and under the action of the third linear driving mechanism, the pressing plate can press the sliding sleeve downwards, so that the sliding column at the upper part is exposed out of the sliding sleeve, the sliding sleeve can be pressed downwards automatically, and the friction sensitivity can be measured automatically.

The application discloses a kind of gel-like energetic material continuous pushing device and its related system, device and method, the gel-like energetic material can be stably filled in water gap for a long time without shell and connect gap positive and negative electrode.Other ingredients do not contain explosive in dangerous goods item, common formula is the mixture containing nitromethane, aluminum powder, metal oxide, friction sensitivity and impact sensitivity are zero after test of initiating explosive, safety is extremely high.And formula component is not soluble or very difficult to dissolve in water, not fail, not decompose under long-time soaking in water, still can be normally initiated under the action of pulse current.Gel-like energetic material is filled in water gap and can generate fixed amplitude, impulse and energy shock wave under the driving of specific parameter pulse source, with excellent repeatability.Compared with original parameter, water gap discharge greatly improves the amplitude, impulse and energy of shock wave, with great engineering application prospect.

The application provides a friction sensitivity testing device under thermal coupling, and relates to the technical field of testing equipment. The testing device comprises a temperature control module, an electrostatic conducting workbench, a friction sensitivity device and a data acquisition and processing module. The temperature control module is used for controlling the sample temperature in real time in the friction sensitivity test, the electrostatic conducting workbench is used for quickly conducting away the static electricity accumulated on the surface of the sample and the static electricity on the operator, the friction sensitivity device is used for testing the friction sensitivity under the set condition, and the data acquisition and processing module is used for real-time monitoring of the rotating speed and transient power compensation. The application has the advantages of accurate data, high safety protection level, expandable temperature range, and obtainable friction sensitivity data under the coupling of heat and mechanical friction force. The application can be widely applied to the research, production, process optimization, storage and safe use of energetic materials, and is especially suitable for testing of the energetic materials sensitive to static electricity.