Gear pumps rely on the work of the pump cylinder and the meshing gear formed between the volume change and movement to transfer fluid or to make the pressure booster pump.
Outer meshing double gear pump structure. A pair of intermeshing gears and pump cylinders separate the suction chamber from the discharge chamber. When the gear rotates, the volume of the tooth between the tooth on the suction side and the tooth on the tooth side gradually increases and the pressure decreases, and the liquid enters the space between the teeth under the pressure difference. As the gear rotates, liquid between the teeth is brought to the discharge chamber. At this time, the volume between the teeth on the discharge side of the tooth on the side of the cavity is gradually reduced, and the liquid is discharged. Gear pump is suitable for conveying non-solid particles, non-corrosive, the viscosity of a larger range of lubricating liquid. Pump flow to 300 m 3 / hour, the pressure up to 3 × 107 Pa. It is often used as a hydraulic pump and delivery of various types of oil. Gear pump structure is simple and compact, easy to manufacture, easy maintenance, self-priming capacity, but flow, pressure pulsation and noise. The gear pump must be fitted with a safety valve to prevent damage to the pump or prime mover if the outlet pressure of the pump exceeds the allowable value due to blockage of the exhaust pipe for some reason.
(A) Working principle Gear pump is a kind of positive displacement pump, which consists of two gears, the pump body and the front and the back cover to form two enclosed spaces. When the gear rotates, the volume of the space on the side of gear disengagement increases from small to large to form a vacuum, Inhalation of the liquid causes the volume of the space on the meshing side of the gear to decrease from large to small, and squeezes the liquid into the pipe. The suction chamber and the discharge chamber are separated by the meshing line of two gears.
The pressure at the outlet of the gear pump depends entirely on the resistance of the pump.
(B) operation and maintenance (1) check before starting all flanges, joints tightness.
(2) Disc drive coupling, no friction and collision sound.
(3) The first start should be injected into the pump liquid.
(4) should be fully open before the start of inhalation and discharge of the valve in the pipeline, closed valve is strictly prohibited to start.
(5) After verifying the direction of motor rotation, start the motor
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