4results about How to "Strong engineering applicability" patented technology

The invention relates to a rapid charge supply device for spacecraft pulse charge emission, and belongs to the field of space charging and discharging. The bottom plate is of a plate-shaped structure which is horizontally arranged in the axial direction; the cathode is of a cylindrical structure; the cathodes are in coaxial butt joint; the anode is of a cylinder structure; the anode is coaxially arranged in the inner cavity of the cathode; the root of the anode is butted with the bottom plate; the working medium sleeves the outer wall of the middle part of the anode and is filled between the cathode and the anode; the spring is sleeved on the outer wall of the anode root; one end of the spring is contacted with the bottom plate; one end of the spring contacts with the working medium end face; the insulating assembly is arranged at the opening of the axial head end of the cathode; two poles of the energy compression module are respectively connected with the cathode and the anode; the power supply is connected with the energy compression module to charge the energy compression module; a charge self-consistent cavity is formed on the outer side of the opening of the axial head end of the cathode; when the device is used for spacecraft pulse charge beam output, rapid supply in the pulse is achieved, and the spacecraft is kept electrically neutral in real time.

This invention discloses an azeotropic phase change cooling rotor assembly, a Roots compressor, and a vacuum pump. The rotor assembly includes a main rotor with circumferentially shaped through-holes and an axially oriented internal through-hole on the rotor shaft. A first and a second auxiliary rotor are mounted at both ends of the main rotor. Rotor sealing plates are arranged on the inner sides of the two auxiliary rotors to seal the shaped through-holes and form a first azeotropic flow region. One end of the rotor shaft is connected to a drive motor, and the other end connects to a swirl cooling pipe with swirl fins on its outer wall, forming a second azeotropic flow region through end sealing. The first and second azeotropic flow regions are filled with an azeotropic phase change cooling medium. This invention is based on the azeotropic phase change heat transfer principle and combines a swirl cooling structure to achieve efficient heat dissipation. The overall structure is simple and compact, eliminating the need for complex cooling equipment, effectively suppressing rotor temperature rise during operation, and avoiding rotor jamming caused by high-temperature thermal expansion.

This invention discloses a self-sensing flange gasket for structural health monitoring of pipeline systems. The flange gasket consists of functional components and signal transmission circuit components. The functional components have a three-layer concentric ring contact structure, including a sealing inner ring layer, a leakage detection middle ring layer, and a sealing reinforcement outer ring layer, used to achieve the sealing and condition monitoring functions of the flange gasket. The signal transmission circuit components include an inner ring edge electrode layer and a middle ring planar interdigitated electrode layer, used to acquire and transmit electrical signals from the flange gasket. All components use flexible PDMS as the base material to ensure the elastic deformation sealing capability of the flange gasket, while the self-adhesive properties of PDMS are used to achieve seamless assembly between the layers. This invention, through a multi-functional layer modular design, utilizes multi-dimensional electrical signal changes caused by different physical parameters to achieve simultaneous detection of fastening pressure and leakage components, thus meeting the engineering requirements for condition monitoring of pipeline systems.

The invention belongs to the technical field of power electronic system control, and particularly relates to a bridge arm energy balance control method of a modular multi-level converter, which comprises the following steps: generating a direct current bus current reference value for representing the direct current side energy regulation requirement of the modular multi-level converter; in combination with the energy state of each bridge leg, generating a bridge leg current reference value corresponding to each bridge leg by using a bridge leg current reference value distribution strategy; generating mutually independent bridge leg common-mode voltage modulation signals of the bridge legs; based on a common-mode modulation signal energy rectification distribution strategy, performing energy rectification type distribution in the bridge legs, and generating common-mode voltage modulation signals corresponding to the upper bridge arm and the lower bridge arm; the differential mode voltage modulation signals are combined with differential mode voltage modulation signals generated by alternating current side control to generate bridge arm voltage modulation signals corresponding to the bridge arms; trigger pulses of all sub-modules in the bridge arm of the modular multilevel converter are generated through a modulation method, and controlled adjustment of the energy of the bridge arm is achieved.