Experimental study of china slurry pump and future direction of improvement

Experimental study of china slurry pump and future direction of improvement

      With the PIV , LDV technology and ultrasonic technology matures , people can take advantage of these advanced technologies in the flow field tests without interference flow field of high-precision measurements.

Some of these advanced technologies have been studied using china slurry pump pump flow field in Canada, we can apply this issue PIV ( particle image velocimetry ) conducted experimental study , whose main content is the distribution of the pump when the determination of the different flow field flow and contrast when mixed phase and single-phase flow field in the china slurry pump similarities and differences.

Test procedure:

Using the density and viscosity of the crude oil of similar industrial white oil as a test medium , and white oil with a density close to GDX501 polystyrene beads as tracer particles . Strong light sheet using a 10W neon laser generator and the corresponding optical system as a result of the PIV camera lighting , and the use of video or photographic methods filming PIV images. For different conditions, respectively, under single-phase and two-phase flow conditions medium china slurry pump pump tube, valve , piston and other parts of the PIV image recording and photography, to prepare for further analysis and processing .

Experimental results and analysis:

As the study of deep-well pump fixed valve parts flow field has a corresponding research results, and gas-liquid two-phase PIV image processing program is not perfect, so here is focused on the analysis of the flow medium china slurry pump when traveling valve and single- phase fluid column Cypriot parts of the flow field .

Movement of china slurry pump

In the experiments, the movement of the valve and to live china slurry pump people know it is not exactly the same , in addition to its sports vertical linear motion , accompanied by two rotary motion . When the small piston velocity, the ball around a horizontal axis of rotation under ; When the piston velocity is larger, the ball ‘s rotation around the vertical axis and horizontal holes along the inner corners of that valve seat hole center axis of revolution . Angular velocity of the rotation speed of the plunger movement , the greater the speed of movement of the plunger , the greater the rotational angular velocity of the ball . Special form of exercise is mainly related to the impact of the ball particularity and fluid valve ball , valve seat structure related. china slurry pump pump valve is a ball valve , when the fluid flows around it in the rear part of the phenomenon will occur from the boundary layer , while generating a lateral force excitement . Due to the symmetry of the ball , this lateral force excitement around the ball along the ” equator ” cycle to move the valve ball is not always in the seat hole axis line, but deviates from a distance and close to the seat on the corner of rotation, which is the ” revolution ” phenomenon.

In addition , due to the instability of fluid flow and fluid ball deviations caused by the relative movement of the ball valve asymmetry of the ball will have some scratching move, so this is not a lateral force acting on the center of the sphere , but in the horizontal plane and a certain eccentricity , there is a ball valve rotating in a horizontal plane , i.e., ” rotation ” phenomenon. These conclusions are obtained in the case of pure liquid . When the gas-liquid mixed phase flow , due to the presence of bubbles , the flow field is more intense disturbance , and the bubble of the ball has a certain impact, this time the ball movement is more complex , in addition to rotary motion , as well as up and down the violent beating.

Concluded that china slurry pump done to deal with the following improvements :

( 1 ) the ball is one of the main components of china slurry pump pump , also wearing parts , which determines the efficiency of the pump and pump inspection cycle. Recommendations for mixed -phase flow china slurry pump pump eccentric spherical valve ball , the runner narrow china slurry pump using drop -shaped ball of sand pumping wells inlaid with a china slurry pump is sealed using a tapered rubber ball .

( 2 ) in the area to ensure maximum overcurrent conditions , the flow cross-section shape of the valve dome should be streamlined as much as possible to reduce the over- flow resistance .

( 3 ) the structure of the design of the plunger , the streamlined design should be considered or the lower end of the plunger -type suction bell mouth to reduce suction resistance . Plunger exit ensure maximum flow cross-section , while the outlet flow path of the plunger is designed to be streamlined to reduce the flow resistance of the plunger over the outlet.