Working principle of screw pump

Answer 1

Screw pump are turning to the use of screw liquid smoke platoon. Map express cutaway view of the three screw pump. The screw rod pump is attracts a row of liquid using the screw rod rotation. In the chart expresses three screw rod pump cutaway view. In the chart, the middle screw rod is the driving screw rod, by the prime mover impetus rotation, two side screw rods is the driven screw rod, makes the contra-rotation along with the driving screw rod. Lord, Follower threaded screw threads are double-headed. Because of the mutual engagement of the screw and screw with the lining of the tube wall, close co-operation at the pump intake and outlet between, it will be segregated into one or more enclosed space. With the screw rotation and meshing, the sealed space in the pump suction side evolving to inhalation chamber in close one of the liquid, and from inhalation of room along the screw axis moved continuously push from client, will be closed in the space continuous discharge of liquid, like a nut in the thread when he was constantly turning the situation to move forward, this is the basic working principle of the screw pump. Screw the working principle is: screw work, after being sucked into the liquid and pump threaded shell sealed by Wail Spaces, when the initiative rotary screw, the screw sealed volume under compression at snails tooth improve screw pressure and axial movement. Because the screw rod is constant speed revolving, therefore the liquid leaves flows the current capacity also is even.

The screw rod pump characteristic is: The screw rod pump loses slightly, the economical performance is good. The pressure is high and is even, the current capacity is even, the rotational speed is high, can and the prime mover straight association. The screw rod pump may transport the lubricating oil, the transportation fuel oil, transports each kind of oil class and the high polymer, uses in transporting mounts the thick liquid. Transportation macro viscosity medium: Different may transport the viscosity according to the pump size from 37000-200000 centipoises medium. Includes the pellet or the textile fiber medium: The pellet diameter may this 30mm (not surpass rotor eccentricity).The textile fiber long may 350mm (quite 0.4 rotor pitch). It's content in general up to 40% of medium cellar, if the medium of solids for the minor form of powder, the highest level of up to 60% or higher can also transfer. Stress and stability requirements of transportation, media love to undermine the inherent structure, the selection of a single screw conveyor is ideal