65results about How to "The test process is stable and reliable" patented technology

The invention provides an electric propulsion spacecraft plume parameter acquisition method. In a condition of simulating a spacecraft orbit environment, plasma potential, plasma density, electron temperature, plasma ion energy spectrum, electric propulsion plume pollutant deposition and the like, and distribution of space parameters around a thruster are tested; due to use of an oil-free vacuum system, a thin gas atmosphere and a clean environment condition are provided for the method, accuracy of measured data during the test process is greatly enhanced, and an electric thruster test operation risk is reduced; and pollution data in electric thruster multi-parameter diagnosis equipment are measured and acquired, electric propulsion spacecraft plasma plume parameter distribution and a spacecraft in-orbit performance degradation condition in a simulated space environment condition can be estimated, and guidance and basis are provided for research on the electric propulsion spacecraft and service life estimation. The method of the invention is applied to electric propulsion spacecraft engine plume feature test and can be applied to scale test.

The invention belongs to experimental and testing devices for mechanical parts, and specifically relates to a torque force testing device for a large-sized bolt. The device comprises a clamping and fixing part and a twisting part; the clamping and fixing part is formed by the way that two guide rails (22) are arranged on a pedestal (17), left and right guide sleeves (21) are arranged on each guide rail (22), a sliding pull base (28) is formed on the four guide sleeves (21), a bolt pull sleeve (7) is placed in an opening cavity of the sliding pull base (28), and two sides of the bolt pull sleeve (7) are sleeved in sliding rails (8) at two sides of the opening cavity of the sliding pull base (28) via sliding sleeves (6); a front end of a tensioning screw (2) is connected with the bolt pull sleeve (7); a locking screw disc (3) is sleeved on the tensioning screw (2); a rack (25) is arranged on the pedestal (17); and a shaft (19) of a wheel gear (24) engaged with the rack penetrates into the sliding pull base (28). The twisting part is orderly composed of a nut sleeve head (10), a rotary special-shaped head (11), a universal coupling (12), a torque sensor (13), a coupling (14), a reducer (15) and a motor (16). The torque force testing device is steady, reliable, accurate, safe and convenient in the test procedure, and can implement automatic test and improve the speed, the efficiency and the accuracy of the test.

The invention provides an automatic sorting machine for lithium batteries, which includes a control unit and a feeding mechanism electrically connected to the control unit, a code-spraying scanning mechanism, a testing mechanism, a sorting mechanism, a discharging mechanism and a conveying trough. The feeding mechanism is located at the head end of the conveying trough, the testing mechanism is set on the conveying trough, the code-spraying and scanning mechanism is set on the side of the conveying trough and between the feeding mechanism and the testing mechanism, the discharging mechanism and the testing mechanism Arranged side by side, the sorting mechanism is erected above the testing mechanism and the discharging mechanism, and the sorting mechanism will correspondingly pick up the lithium batteries that have been tested on the testing mechanism and place them on the corresponding receiving trough of the discharging mechanism . The invention can not only perform scanning test sorting fully automatically, improve work efficiency, but also can test multiple lithium batteries at the same time, with high test efficiency, stable and reliable test process, and no need for manual coding, and the consistency of lithium battery sorting is also high. higher.

The invention discloses a carbon fiber gas cylinder detection line and a carbon fiber gas cylinder detection method. The detection line includes, in a front-to-back arrangement manner, a water pressure test apparatus, a water pressure auxiliary test apparatus and an air tightness test apparatus. The water pressure test apparatus includes a test rack, a test operation bench, a pressurizing apparatus, a test case installed on the test rack, and test trolleys for stably placing a plurality of to-be-tested gas cylinders. The water pressure auxiliary test apparatus includes a gas cylinder fixture, a transporting trolley, and a gas cylinder water-pouring-away and drying device. The air tightness test apparatus includes an air tightness detection apparatus and a second air supply apparatus for supplying air to the to-be-tested gas cylinders. The air tightness test apparatus is in a cabinet structure or a ground trough structure. The detection method includes the steps of 1) water pressure test; 2) water pouring-away and drying treatment; and 3) air tightness test. The detection line is reasonable in design and simple in operations, is good in use effects, and can easily and quickly complete water pressure test and air tightness test for a plurality of carbon fiber gas cylinders.

The invention discloses a stretching device for rubber swelling property testing and a testing method. The stretching device comprises a frame, a movable plate arranged in the frame, and a rotating mechanism for driving the movable plate to move back and forth. A first clamping mechanism and a second clamping mechanism for clamping the two ends of rubber respectively are correspondingly arranged on the frame and the movable plate. By means of the structure, the position of the movable plate is regulated through the rotating mechanism, and then the distance between the first clamping mechanism and the second clamping mechanism is adjusted to obtain the stretching amount and deformation amount needed by the rubber. Due to the fact that the frame is adopted for restraining the movement locus of the movable plate, the movement stability and reliability of the movable plate are guaranteed, and the reliability of rubber swelling testing data is ensured.