The basic structure of our general self-priming centrifugal pump is composed of six parts respectively impellers , pump, shaft , bearings, seal rings , stuffing .
1 , is a core part of the centrifugal pump impeller , which is relatively large force , higher speed , blade impeller also play a major role in front of the impeller assembly through static equilibrium experiments. Inner and outer surfaces smooth impeller required to reduce flow friction losses .
2 , also known as the pump casing , which is the subject of self-priming centrifugal pump . Fixed play a supporting role , and connected with the installation of the bearing bracket .
3 , by the effect of the coupling shaft and the motor is connected to the torque transmitted to the motor impeller , it is the main part of mechanical energy transfer .
4 , the bearing sleeve is supported on the shaft member in the shaft , there are two rolling bearings and sliding bearings . Rolling use butter as a lubricant oil to the proper volume is generally too much heat up 2 /3 to 3/4 , there are too few sound and heat ! Sliding bearings is transparent oil as a lubricant , fuel oil level line. Too much oil to be leaking along the shaft and drift cheap , too overheated bearings also burned causing accidents ! Priming pump is running at the highest temperature in the bearing of 85 degrees is generally run at about 60 degrees , if necessary high find the cause ( if there are impurities , oil is black, if the water ) and timely manner !
5 , also known as reduced leakage sealing ring ring . Cause water pump high pressure area over the General Assembly of the impeller clearance of imports and the pump casing through the gap between the low pressure area , the impact of the pump out the water , reducing efficiency ! Gap is too small will cause the impeller and the pump casing friction and wear . To increase the leakage resistance is reduced at reflux , the delay of the impeller and the pump casing life , provided with a sealing ring in the pump housing and impeller aid junction edge seal gap is maintained between 0.25 ~ 1.10mm appropriate.
6 , stuffing mainly by packing, lantern ring , packing tube, packing gland , seal tube. The main role of the stuffing box to the closure gap between the casing and the shaft , the pump does not prevent water flowing out , it does not allow outside air into the pump. Always keep the vacuum pump inside ! When the shaft and packing friction generates heat seal the tube to rely on water to stay cool the filler seal circle ! Maintain the normal operation of self-priming centrifugal pump . So running the tour inspection process checks for a centrifugal pump stuffing is important to note ! Run 600 hours or so of filler should be replaced .