YCB arc gear pump rely on the work of the pump cylinder and the meshing gear formed by the volume change and movement to transfer liquid or make the pressure booster pump external gear structure of the double gear pump a pair of intermeshing gear and pump cylinder The suction chamber and the discharge chamber are separated from each other, and when the gear rotates, the volume of the tooth between the suction side cavity teeth gradually increases and the pressure decreases, and the liquid enters the interdental space under the pressure difference. As the gear rotates, the liquid between the teeth is led to the discharge chamber, whereupon the volume between the teeth on the discharge chamber side gradually decreases to discharge the liquid, and the gear pump is suitable for conveying solid particles. Corrosive. Lubricating fluid with a wide range of viscosities. Pump flow up to 300 m3 / h and pressure up to 3 x 107 Pa. It is usually used as a hydraulic pump and transportation of various types of oil. Gear pump structure is simple and compact, Easy to manufacture, easy to maintain and self-priming, but with large flow and pressure pulsations and noises. Gear pumps must be equipped with safety valves to prevent damage to the pump outlet pressure beyond its allowable value for some reason, such as blockage of the discharge pipe Pump or prime mover I. Working principle: YCB circular arc gear pump is a type of positive displacement pump composed of two gears, the pump body and the front and back covers form two enclosed spaces. When the gear rotates, the volume of space on the side of the gear disengaging From small to large, the formation of a vacuum, the liquid inhalation, gear meshing side of the volume of space from large to small, and squeeze the liquid into the pipe to the suction chamber and the discharge chamber is by two gear mesh lines to separate. The pressure at the outlet of the gear pump depends entirely on the pump resistance Size. 二 .Operation and maintenance (1) Before starting to check all pipe flanges, joints of the seal. (2) Panning the coupling, no friction and collision sound. (3) The first start should be injected into the pump liquid (4) Start the valve should be fully open before inhalation and discharge of the pipeline, closed valve is strictly prohibited to start. (5) After verifying the direction of motor rotation, start the motor. 三 .YCB arc gear pump common failures and maintenance methods: ( 1) Symptom: The pump can not discharge. Cause of malfunction: a Reverse rotation direction: b Suction or discharge valve closed: c No inlet or low pressure at the inlet: d Viscosity too high, pump unable to bite countermeasures: a Check the direction of rotation: b Confirm the valve is closed: c check the valve and pressure gauge: d check the liquid viscosity, low-speed operation by the speed ratio of the flow rate is there, if the flow, then inflow. (2) Failure phenomenon: insufficient pump flow Failure causes: a Suction or discharge valve closed: b Inlet pressure is low: c Outlet line plugged: d Stuffing box leak: e Speed ​​is too low Countermeasure: a Make sure the valve is closed: b Check if the valve is open: c Verify that the discharge volume is normal d Fasten: A large number of leaks affect production, should stop running, disassembly inspection: e check the pump shaft Rotating speed