In the pump industry, there is such a statement of centrifugal mud pump, but in fact, from the physics theory, in fact, the mud pump itself belongs to a centrifugal pump, and centrifugal mud pump from the industry explained, Generally refers to a device that converts electrical energy to kinetic and potential energy of a medium by a mechanism that increases the energy of the solid and liquid mixing medium by the action of centrifugal force (rotation of the impeller of the pump). Therefore, the name of the centrifugal mud pump is divided from the perspective of the transmission medium of a centrifugal pump. Centrifugal mud pump working principle and type Brief introduction Working principle: Centrifugal mud pump is commonly used piston or piston-type, driven by the power machine crankshaft rotation, the crankshaft through the crosshead and then drive the piston or plunger to reciprocate in the pump cylinder In the suction and discharge valve under the action of alternating, to achieve the purpose of pressure and circulating flushing fluid. Mud pump is the surface flushing medium ─ ─ water, mud or polymer flushing fluid under certain pressure, through the center of high pressure hose, faucet and drill pipe straight hole to the bottom of the drill bit, in order to cool the drill bit, will be cut down Rock removal and delivery to the surface of the purpose. Structure type: Take PN type centrifugal mud pump as an example. There are 16 types and 35 basic types for single type, end suction and cantilever type. For high-lift pump overcurrent part of the double-layer structure, the discharge diameter Product performance: Centrifugal mud pump performance of the two main parameters of displacement and pressure. Displacement in a few liters per minute discharge calculation, which is related to the diameter of the borehole and the required rate of flushing fluid from the bottom of the hole on the speed, that is, the larger the aperture, the greater the displacement required. Requires the rinse fluid on the back speed of the bit can cut the drill cuttings ﹑ rock punching timely from the bottom of the hole, and reliably carry to the surface. Geological core drilling, the general return speed of 0.4 to 1 m / min or so. The pressure of the pump depends on the depth of the borehole, the resistance of the passage through which the flushing fluid passes, and the nature of the flushing fluid delivered. The deeper the borehole, the greater the resistance of the pipe and the higher the pressure required. With the drilling diameter, depth changes, requiring the pump displacement can be adjusted at any time. In the pump mechanism with gearbox or hydraulic motor to adjust its speed, in order to achieve the purpose of changing the displacement. In order to accurately grasp the pump pressure and displacement changes, the mud pump to be installed on the flow meter and pressure gauge, at any time to make the drilling staff to understand the operation of the pump at the same time by pressure changes in the hole to determine the normal condition to prevent the occurrence of hole accidents . (Editor: Yunhai QQ:) Recommended reading: Acting Procurement 2016 Xiamen 98 CIFIT
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