Self-priming centrifugal pump structure and maintenance

Self-priming Centrifugal Pump In the fuel injection pump oil amount adjusting mechanism, in addition to the above-mentioned tooth-rod type oil amount control mechanism, there is also a type of shift-fork type oil amount control mechanism. At the lower end of the plunger there is an adjusting arm. The end of the adjusting arm's ball end is placed in the groove of the adjusting fork. After the spherical valve seat is worn, a steel ball can be placed on the valve seat, and then the steel ball can be tapped with a metal rod. Until the ball valve and valve seat close. If the valve seat is worn badly, it can be reamed to remove the wear marks and then it can be closed by the upper method. After the plunger seat wears, the plunger of the self-priming centrifugal pump continues to move upwards. The pressure process continues until the spiral bevel on the plunger allows the plunger to return to the oil hole. When the oil hole is opened, High pressure oil flows from the oil chamber through the longitudinal groove in the plunger and the oil return hole in the plunger sleeve back to the oil passage in the pump body. The self-priming centrifugal pump boom technology is a key technology of the concrete oil pump truck. Sany Heavy Industry has successfully developed China's first 37 meters with independent intellectual property rights through hard and independent R&D and innovation. Boom oil pump truck. The length and diameter of the high-pressure tubing are selected after measurement and cannot be arbitrarily changed. When the multi-cylinder injection pump is calibrated, it must ensure that the inner diameter and length of the high-pressure fuel pipe are the same and use points. Self-suction centrifugal pump basis and specific operation method, high head requirements, small flow rate and no suitable small flow High-lift centrifugal pump can be used, optional reciprocating pump, if cavitation requirements are not high, you can also choose the vortex pump, head When the flow rate is very low, axial and mixed flow pumps are available.

Self-suction centrifugal pump When setting the sequence valve in the hydraulic system of the concrete gear oil pump, it is necessary to understand the working characteristics of the sequence valve and correctly adjust the working pressure of the sequence valve. The greater the angle at which the plunger does not rotate for the oil level 1, the greater the distance from the upper end of the plunger to the bevel edge of the oil return opening of the plug sleeve. The larger the oil supply, the greater the angle of rotation of the plunger. When it is small, the oil cut off starts earlier and the oil supply is also smaller. Self-priming centrifugal pumps are operated near the upper stop point at low and high loads. This regulation method is applicable to marine diesel engines with high pressure boost and changes in speed and load. Self-priming centrifugal pumps are helical gears, herringbone gears, and helical gears. The involute gears are mainly involute and arc type. Usually small gear pumps use involute spur gears. High temperature gear oil pumps often use shift gears. Melt pumps that deliver high viscosity, high pressure polymer melts use involute helical gears. The self-priming centrifugal pump determines the clean water pump, hot water pump, oil pump, chemical pump/anti-corrosion pump, impurity pump or pump installed in explosion area with non-clogging pump according to the nature of the liquid medium. Motor. The self-priming centrifugal pump long-term liquid has gradually developed into the domestic R&D and production center for Komatsu engineering gear oil pump. The product has developed into 9 categories and 200 varieties. It has been awarded as "Shanxi Famous Brand Product" and the National Top 10 Customer Satisfaction Products for Gear Pump Industry. Top Ten Best-selling Products.

The self-priming centrifugal pump has been adjusted before shipment from the factory and must not be arbitrarily high-profiled. When re-adjustment is required, pressure gauges must be used. Because it uses today's most advanced frequency conversion speed control technology, this series of test stands has obvious technical advantages and strong competition compared to other types of products with the same power on the market. The self-priming centrifugal pump uses the pump characteristic curve to find the desired flow value on the abscissa, and finds the required head value on the ordinate, and draws the vertical or horizontal line from the two values ​​respectively upwards and rightwards. The intersection of the two lines falls exactly on the On the characteristic curve, the length and diameter of the high-pressure fuel pipe of the self-priming centrifugal pump are selected after measurement and cannot be arbitrarily changed. When the multi-cylinder injection pump is calibrated, it must ensure that the inner diameter and length of the high-pressure fuel pipe are the same and use points. For open-air or semi-outdoor pumps, the pump is generally perpendicular to the axis of the prime mover and the axis of the gallery. For the indoor layout of the pump, when the liquid temperature is higher than the natural point or the transport liquid is liquid hydrocarbon, it should be arranged separately from the other pumps in the respective room. Self-priming centrifugal pump Dongfanghong-802/802K tractor and Dongfanghong -The 802KT bulldozer uses a CBN-E450 or CBTI-E550 gear oil pump, which has a large flow rate and good reliability. The instrument box has the main operation control mechanism of the test bench, including the positive and negative rotation start and stop switches of the host; the oil amount counting control switch; the rotation speed, count, temperature, pressure bar stroke, spindle rotation angle display device, and ten contact membrane type Speed ​​presetting mechanism. The heat generation of the gear pump hydraulic system directly affects the normal operation of the concrete gear oil pump. The main causes are the following: After the temperature of the working fluid increases, the viscosity of the working fluid decreases, and the leakage of the gear oil pump increases. The suction centrifugal pump has sufficient liquid to fill the root of the gear just disengaged from the mesh, greatly improving the self-priming performance of the gear oil pump, avoiding the phenomenon of air suction, not only improving the volumetric efficiency, but also reducing cavitation and noise .