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Building automation system services
15
2023
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05
The pressure loss in these components of a high-pressure cleaner will affect other parameters of the system
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The pressure change of the high-pressure cleaning machine can affect other parameters of the system, and appropriate adjustment of the corresponding pressure parameters can reduce the pressure loss during the process of obtaining the optimal impact force
The pressure changes in a high-pressure cleaner will affect other parameters of the system; appropriate adjustments to the pressure parameters can reduce pressure losses in the process of obtaining optimal impact force. According to the formula N = 16.7PQ / 1000, it can be seen that the energy loss of a high-pressure cleaner is proportional to the pressure. Therefore, the pressure loss of a high-pressure cleaner can be studied mainly from three aspects: pressure loss at the top of the high-pressure cleaner, pressure loss and pressure in the high-pressure hose section, and nozzle loss.
Pressure loss at the top of the high-pressure cleaner:
In a high-pressure cleaner, because there is a section of high-pressure water pipe from the outlet of the high-pressure pump to the outlet of the drum, this is called the pressure loss at the top of the high-pressure cleaner. This section of high-pressure hose has 4 to 5 joints and elbows, and the high-pressure water rotates sharply, so the loss usually reaches 5% of the total loss of the cleaning system, about 15-20 bar. Although the pressure loss is not large, the pressure loss at the top of the high-pressure cleaner should be considered when calculating the pressure loss of the high-pressure cleaner.
Pressure loss of the high-pressure cleaner nozzle:
The direct cleaning tool of the high-pressure cleaner is the spray gun. The nozzle is the first to bear the brunt because the nozzle produces a high-pressure water jet. It is the only tool that converts the pressure energy of the high-pressure pump into velocity energy. Nozzle pressure loss is mainly caused by the local pressure concentration of high-pressure water in the nozzle and the sudden change in dynamic pressure. Pressure loss of high-pressure water at the nozzle inlet; pressure loss caused by a large change in the cross-sectional area of the nozzle flow passage; pressure loss caused by a sudden change in the direction of water flow in the nozzle; pressure loss caused by the single stream of water branching into multiple streams; exit pressure loss caused by the high-pressure water jet formed by the high-pressure water flowing out of the nozzle.
The pressure loss caused by the high-pressure water flowing in the nozzle is very large. If the shape and inner hole structure of the nozzle are not properly designed, the maximum pressure loss may account for 60% of the total pressure loss of the high-pressure cleaner. The pressure loss in the nozzle section accounts for the largest proportion in the total pressure loss of the high-pressure cleaner. In order to reduce the pressure loss of the nozzle, this goal can only be achieved by properly designing and accurately producing the internal structure of the nozzle.
Pressure loss in the high-pressure hose section of the high-pressure cleaner:
The high-pressure hose section is a long section of hose from the reel outlet to the spray gun inlet. The pressure loss of this part of the pipeline accounts for more than 50% of the total pressure loss of the high-pressure cleaner, and can even reach 2/3. The pressure loss of this part of the pipeline can be obtained in two ways: one is through calculation, and the other is through experiment. During the calculation, the flowing high-pressure water should be regarded as a turbulent state, because turbulence is consistent with the actual situation.
When calculating the pressure loss of the high-pressure hose section, the winding loss of the high-pressure hose on the reel should also be considered. The smaller the curvature radius of the winding and the more turns, the greater the pressure loss. In practical applications, if the selection or handling of the high-pressure hose is improper, it will greatly reduce the cleaning effect of the high-pressure cleaner, and may even fail to achieve the original intention of the purchase.
Tianjin Harvest High Pressure Pump Co.,Ltd
Tel：+86 13389901626
E-mail：export01@tjhwst.com
Add：Zone B, Panzhuang Industrial Park, Ninghe District, Tianjin
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