4results about How to "Affect operating efficiency" patented technology

The utility model relates to the technical field of locomotive handrails, and discloses a locomotive handrail, which comprises a flange plate, an elbow pipe and a handrail pipe, and is characterized in that at least one pin hole I radially penetrating through a central hole of the flange plate is formed in the peripheral surface of the flange plate; mounting holes which are annularly distributed by taking the center of the flange plate as a circle center are axially formed; the elbow pipe is provided with a first end and a second end, the first end is a sleeve end connected with the center hole of the flange plate in an inserted mode, and the sleeve end is provided with a second pin hole corresponding to the first pin hole; the elbow pipe further comprises anti-disengaging pins, the anti-disengaging pins with the corresponding number are sequentially inserted into the first pin holes and the second pin holes, the outer ends of the first pin holes are welded and sealed, and connection of the elbow pipe and the flange plate is achieved. According to the scheme, a pin connection mode is adopted to replace a traditional rigid welding mode, the risk that fatigue cracks are prone to being caused by the welding position and rapidly expand is eliminated, the structural strength of the handrail is improved, the service life of the handrail is prolonged, and the situation that crew members are injured due to crack damage of the handrail and the operation efficiency of a locomotive is affected by handrail maintenance can be avoided.

This invention discloses an adaptive parameter optimization control method and system for frequency converters under voltage sags, relating to the field of frequency converter parameter optimization control technology. It solves the technical problems in existing technologies where it is impossible to simulate voltage sag environments for frequency converters, thus hindering targeted parameter control and increasing the impact of voltage sags. Specifically, it includes a voltage sag prediction unit that predicts voltage sags in the operating environment of the frequency converter; a voltage sag parameter analysis unit that analyzes the impact of voltage sags on frequency converter parameters and sets control strategies for frequency converter parameters based on the analysis; and an optimization identification control unit that simulates voltage sag environments for the frequency converter and infers the impact of voltage sag parameters on the frequency converter during operation based on the simulation.

This invention discloses a highly efficient plant protection machine for controlling major pests of cowpeas, belonging to the field of plant protection equipment technology. It includes a housing; the top of the housing is equipped with a blower assembly for blowing off diseased, withered leaves and insect-infested flowers from cowpeas; one end of the housing is equipped with a sweeping assembly for cleaning diseased and withered leaves from furrows and ridges; and the interior of the housing is equipped with a suction and crushing assembly for collecting the diseased and withered leaves after sweeping. In this invention, the blower can blow diseased and withered leaves attached to cowpea plants into furrows and ridges. Because the blower is fixedly connected to a vertical plate by a second spring, it generates a certain vibration amplitude during startup, causing it to swing. When the swinging blower touches the first springs on both sides, a reaction force is generated, causing it to return to its original position. This cyclical change in the blower's angle allows the airflow to cover a wider area of ​​the cowpea plant.

This application provides a brush assembly and a motor, relating to the field of brush technology, aiming to solve the problem that current high-current brushes cannot be adapted to small commutators. The brush assembly includes: a brush body and a brush braid; the brush body has a wide end and a narrow end connected together, the narrow end slidingly contacting the commutator, and the width of the narrow end is smaller than the width of the wide end in the circumferential direction of the commutator; the wide end is connected to a brush braid with a preset length. When the narrow end is completely worn, the brush braid keeps the wide end of the brush body spaced apart from the commutator. A thinner narrow end is provided at the end of the brush body to accommodate small commutators; a thicker brush braid is provided at the wide end of the brush body to carry high current; at the same time, the thicker brush braid is designed to a preset length to ensure that the wide end of the brush body does not contact the commutator after the narrow end is completely worn, preventing the brush body from contacting the commutator too wide, causing current circulation, overheating, and sparking that could damage the commutator, while also preventing the brush braid from entering the commutator gap.