The choice of high-pressure pump Because the pressure of the cleaning system working pressure provided by the high-pressure water pump, jet and other jet components have been standardized, the choice of cleaning pressure with the pump rated pressure close together. In ensuring the cleaning pressure at the same time, in order to increase the pump power utilization, the cleaning system is usually set slightly lower than the rated pressure of high pressure pump and rated flow level. Taking into account system pressure drop losses and system flow such as pipe loss, an alternative high pressure water pump is identified within the pressure selection range and the alternative cleaning pressure is determined. Considering the cost of equipment, cleaning efficiency, cleaning speed and other related factors, combined with relevant cleaning systems at home and abroad, the ultimate choice of cleaning pressure and high pressure water pump models. In theory, the high pressure pump rated pressure, converted to dynamic pressure and jet speed is also large, striking power is also large, the better the cleaning effect. However, as mentioned earlier, the dynamic pressure and dirt damage intensity related to the dynamic pressure reaches a certain value, and then increase the rated pressure of the pump, the cleaning effect is very small progress. We can see that for the continuous cleaning unit speed, want to get a good cleaning effect mainly by increasing the flow to solve. In general, the rated pressure of high-pressure pump election 7 ~ l0MP. Flow 8 ~ 10m3 / h nozzle selection nozzle diameter is determined by the flow rate, for the aluminum strip to be cleaned, because the board is wider, but also to select the appropriate jet angle and the number of nozzles. The general choice of pressure 2 ~ 275MPa liquid spray fan nozzle, spray angle 250,40 pseudo-appropriate. The size of the nozzle diameter d determines the size of the flow rate, so the nozzle can be selected according to the required flow rate. Nozzle placement The ideal angle of incidence of cleaning is a relatively independent parameter, determined by the material properties of the cleaning object, without affecting other parameter choices, and should be determined first. For the cleaning of rolling oil and soft aluminum viscous soft scales, water jet shear force plays a significant role, the use of a larger angle of incidence, increase shear, in order to facilitate cleaning. Therefore, the high pressure washer nozzle designed to be movable and rotatable form, easy to adjust the jet nozzle interval to make it in the basic section, while the nozzle angle of incidence adjustable, in order to achieve the best possible impact, improve the aluminum Material cleaning effect. In general, the direction of the jet and the surface to be cleaned into 75 sheets. A Best effect. 4 Conclusion Through the theoretical analysis of the high-pressure water jet striking force, that the choice of appropriate pump pressure and flow, in order to achieve the best impact, get a good cleaning effect. In general, the rated pressure of high-pressure pump is 7 ~ 10MPa. Flow 8 ~ 10m3 / h. Select the number of nozzles and jet angle according to the width of the board. Spout angle of 40 to 250 degrees is appropriate, the direction of the jet and the cleaning strip surface into the 75 to 83 degrees best. In order to improve the quality of cleaning, brushing roller device can be added to the pressure washer, and washed with hot water at 60 ~ 70 ℃, dried after cleaning. (Cleaning cycle system high pressure pump and nozzle selection)
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