Abstract: Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: The invention discloses a cooling device based on guidance and isolation for adsorption permanent magnet generators of generator sets, comprising a base, a generator cooling air duct body, an engine, a generator body, a reverse-suction heat conduction fan, a guiding isolation ring, an generator cooling air duct fixedly-connected annular plate, a volute air duct body for guiding and leading out the hot airflow and a soundproof shell, wherein the generator cooling air duct body is arranged on the base, an engine recoil starter is arranged at one end of the engine which is far away from the generator cooling air duct body, an air inlet is formed in the engine recoil starter, the guiding isolation ring is fixedly arranged on the generator cooling air duct body, and the generator cooling air duct fixedly-connected annular plate is fixedly arranged on the generator cooling air duct body.

Abstract: An energy-saving and durable linkage mechanism for electronic engine speed regulation of generator sets, comprises an inverter, a stepping motor, a buffer linkage assembly for engine speed regulation, and a carburetor shaft. The stepping motor is electrically connected to the inverter, and the buffer linkage assembly for engine speed regulation is provided between the stepping motor's output shaft and carburetor shaft. The buffer linkage assembly for engine speed regulation comprises a crank I, crank II, link, and buffer spring. Crank I's one end is fixed to the stepping motor's output shaft, and crank II's one end is fixed to the carburetor shaft's upper end. The crank I's free end is provided with link hook hole I and spring hook hole I, and the crank II's free end is provided with link hook hole II and spring hook hole II. The invention achieves throttle opening control and buffering function with long service life.

Abstract: An independent cooling structure for vibration damping muffler of generator sets, comprising a base, a soundproof cover, a baffle plate, a generator cooling air duct, an engine, a generator body, a cooling air duct for exhaust pipe of cylinder head, a muffler, a flexible hose for damping vibration and an exhaust pipe of cylinder head. The cooling air duct for exhaust pipe of cylinder head is arranged on the side of the generator cooling air duct. The cooling air duct for exhaust pipe of cylinder head is connected with the engine recoil starter. The exhaust pipe of cylinder head is arranged on the cylinder head of the engine. The exhaust pipe of cylinder head is located in the cooling air duct for exhaust pipe of cylinder head. The muffler is arranged in the cooling and heat-discharging cavity of the muffler. An exhaust pipe is arranged on the bottom of the muffler.

Abstract: A suspending release device for observing a drop vibration attitude change of a lander and a test method are provided. The device includes a bench system, a lifting system fixed to the bench system, a horizontal frame system, an attitude control system, and a suspending release system hinged to the attitude control system. The horizontal frame system may slide vertically on the bench system and may drive the attitude control system to slide horizontally. A test lander is fixed to a release sliding block. The release sliding block is locked with a main load bearing block. An attitude of the test lander when releasing is adjusted. The horizontal frame system is lifted to a predetermined height. Guide rods are indirectly driven to release the sliding block by a motor. The whole lander falls freely and touches the ground to collide, and the process is recorded by a high-speed camera.

Abstract: Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: Devices, systems, and methods to air-cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: Devices, systems, and methods to air-cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: A suspending release device for observing a drop vibration attitude change of a lander and a test method are provided. The device includes a bench system, a lifting system fixed to the bench system, a horizontal frame system, an attitude control system, and a suspending release system hinged to the attitude control system. The horizontal frame system may slide vertically on the bench system and may drive the attitude control system to slide horizontally. A test lander is fixed to a release sliding block. The release sliding block is locked with a main load bearing block. An attitude of the test lander when releasing is adjusted. The horizontal frame system is lifted to a predetermined height. Guide rods are indirectly driven to release the sliding block by a motor. The whole lander falls freely and touches the ground to collide, and the process is recorded by a high-speed camera.

Abstract: A computer-implemented method, medium, and system for global deadlock detection in a hybrid database for transactional and analytical workloads are disclosed. In one computer-implemented method, a daemon is launched on a coordinator segment in a massively parallel processing (MPP) database, where the MPP database is a hybrid database for both transactional workloads and analytical workloads. A respective local wait-for graph for each of a plurality of segments in the MPP database is collected periodically, where each of the plurality of segments includes the coordinator segment or a worker segment of a plurality of worker segments in the MPP database. A global wait-for graph that includes all collected local wait-for graphs is built. The global wait-for graph is used to determine that a global deadlock exists in the MPP database. The global deadlock is broken using one or more predefined policies in response to determining that the global deadlock exists.

Abstract: Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: Devices, systems, and methods to air-cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: Devices, systems, and methods to air-cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Abstract: Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.