Self-priming pump attaches great importance to the use of science and technology

08 - 19

self-priming pump pay much attention to the use of science and technology of self-priming pump self-priming height, and before the impeller seal clearance, revolution of self-priming pump, separation chamber level and other factors. Before the impeller, the smaller the seal gap, self-priming pump self-priming height, the greater the generally take to 0. 3 to 0. 5 mm; Increase in clearance, in addition to the self-priming height decreased, self-priming pump lift and efficiency are reduced. Self-priming pump self-priming height increases with the impeller circumferential velocity u2, but by the time the largest self-priming height, turn the increase in the number and self-priming height is no longer increased, at this time just shorten the self-priming time; When the revolution down, self-priming pump self-priming height is falling. In the case of other conditions unchanged, self-priming height also increased with the increase of water height increase ( But not more than the best water separation room height) 。 To mix in the self-priming pump gets better water, impeller blade should be less, the pitch in the cascade increase; The self-priming pump and appropriate USES half open impeller ( Or wider impeller impeller slot) So that more convenient in backwater deeply into the impeller blade. Most with internal combustion engine self-priming pump, mounted on a mobile car, for field operation. Self-priming pump product characteristics: 1, the drainage ability: special impeller block design, ensure the self-priming pump efficiency and no blockage. 2, high efficiency and energy saving: the excellent hydraulic model, the efficiency is higher than general self-priming pump 3 ~ 5%. 3, good self-priming performance, higher than average self-priming pump self-priming height 1 meter, and with a shorter time. Self-priming pump adopts the axial liquid self-priming pump body structure. Self-priming pump body is composed of suction chamber, liquid storage chamber, coil vortex chamber, the liquid hole, and other components of the gas-liquid separation chamber, self-priming pump after the normal starting, the impeller of the suction chamber and inlet line of liquid air suction together, and can completely mixed within the impeller, the function of centrifugal force, and liquid with gas to the vortex flow volume outside edge, the impeller has a certain thickness is formed on the outer edge of the white foam belt and high-speed rotating liquid ring. Gas-liquid mixture into the gas-liquid separation chamber through diffusion tube. At this time, due to the flow rate suddenly drops, lighter gas is separated from the mixture of liquid and gas through the self-priming pump body spit continues to rise. Self-priming water pump after degassing of liquid to liquid storage chamber, and the reflux hole again into the impeller, and impeller with inhalation of gases from the inlet line mixed again, under the influence of the high-speed rotating impeller, and flow to the impeller outer edge. 。 。 。 。 。 。 As the process cycle, decreasing the air in the suction line, until all gas absorption, complete the self-priming process, self-priming pump is put into normal operation. In some of the self-priming pump at the bottom of the bearing body is equipped with cooling room. When bearing fever caused by bearing temperature rises more than 70 degrees, can be arbitrary in the cooling chamber through a cooling fluid pipe, liquid injection cooling circulating cooling. Self-priming pump to prevent fluid from high to low pressure area before and after the leakage of sealing mechanism is sealing ring, sealing ring before loading on the self-priming pump body, the ring is installed on the bearing body, when the self-priming pump after long-term operation sealing ring wear, and affect the efficiency and self-priming pump, self-priming performance should be given replacement. Installation of self-priming pump 1, self-priming pump and motor to drive straight league, attention should be paid to self-priming pump with the motor output shaft alignment; Self-priming pump installation accuracy of self-priming pump running stability and service life have great influence, so we must carefully install correction. 2, strong self-priming pump coupling must use nut, lock nut and watch the nut loose, otherwise easy to cause impeller channeling, cause mechanical failure. 3, to keep the self-priming pump body can maintain a certain liquid storage, in order to achieve good self-priming ability and mechanical seal to prevent dry friction, must make the import of self-priming water pump is higher than the self-priming pump shaft centerline. 4, the installation of the suction pipe should be paid attention to: A, suction installation height can't more than 5 meters, when conditions permit, suction installation height should be below the lowest water pool plane as much as possible, and try to shorten the length of the suction pipe, short-ship elbow, it is beneficial to shorten the self-priming time, improve the function of self-priming. B, in the suction pipe valves, flange, etc. Shall be protected from leakage or leakage of liquid in the suction line does not allow to have the air leakage phenomenon exists. C, should prevent self-priming pump suction in the body solid impurities, such as for suction filter should be set up on the road. The area of effective water filter should be 2 - suction pipe section Three times, the filter should be check regularly. D, suction pipe and spit out line should have their own support, self-priming pump body itself is not allowed to bear load of pipeline. 5, self-priming pump in the installation, should make the self-priming pump and pipeline electrostatic grounding resistance to achieve the requirements of the regulations. 6, when installation should strictly check the self-priming pump shell and pipe in the presence of stones, iron ore and other sundry. 7, correction of self-priming pump coupling and electric motor coupling installation clearance and alignment, it does not allow axiality deviation of 0. 1mm。 The height of the self-priming pump shaft and motor shaft general on foot pad copper or iron. 8, in the actual operation 3 - unit Four hours later, a final inspection, if there is no negative phenomenon, the main for the installation has been completed, check the shaft in the test run. 9, the self-priming pump bearing body every room is equipped with cooling device of the cooling water joint distribution of inner hole for 12 hose or plastic pipe, the thread sizes for M12x1. 75. 10, on the road at the outlet pipe of self-priming water pump, such as a one-way valve and in the process of imbibition cannot make self-priming pump discharge gas smoothly, should be added at the exit of the self-priming pump exhaust pipes and valves.

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