Grader adjust head work and the hydrostatic testing results!
In the process of grading machine, sometimes the actual head is greater than the need to lift the extra lift this grader mostly consumed in the partially closed gate valve resistance, wasting a lot of electricity, such as prolonged operation in this case , you should adjust the lift.
Multistage centrifugal classifier, can be taken to reduce the the waterwheel number approach to adjust forthcoming after the removal of the water wheel, with a length equal to the water wheel hub spacer sleeve instead of the location of the water wheel, but was unable to withdraw a waterwheel, can not be continuously sprinkled several water wheels, the The interval sets face should be parallel, to avoid the end of the impeller hub axis distort. This practice may be lower than the original classifier efficiency of 3-5%, but waste head loss much more economical than not withdraw impeller.
Conditions permit, can also be taken to direct the removal of several middle shorten the way to reduce the head of the grading machine axis, the effect is significant. Special circumstances, can also be taken the car small impeller diameter ways to reduce lift.
Centrifugal classifier overhaul after hydrostatic testing should be carried out to check the pump combination of rigor and quality of the pump body. Average test pressure should be 1.3 to 1.5 times working pressure for the grader to use more manual Strut hydraulic press test tools in the mines. Before the test should suction nozzle, suction, the drainage side cover shaft hole, as well as throughout able permeable hole closed or blocked, irrigation drains mouth full with lid closed, all closed, all must be tight, and thenwith the the installation gauge wire drain holes, plumbing fittings connected to the hydraulic press, to actuate hydraulic press body pressurized water pump to the classification, hydrostatic testing. Towel in the testing process, should be timely check the pump body withstand voltage situations, and for the record, can be used until it reaches the pressure until the requirements, such as the old pump, pressurized to working pressure the 1.15 -1.2 times when there is no leakage.
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