Liaoning gasoline engine driven cold water high-pressure cleaning machine

The pressure changes of the high-pressure cleaning machine will affect other parameters of the system, and adjusting the corresponding pressure parameters appropriately can reduce the pressure loss during the process of obtaining good impact force. According to the formula N=16.7PQ/1000, it can be known that the energy loss of the high-pressure cleaning machine is proportional to the pressure. Therefore, the pressure loss of high-pressure cleaning machines can be mainly studied from three aspects, namely the pressure loss in the upper part of the high-pressure cleaning machine, the pressure loss and pressure in the high-pressure hose part, and the nozzle loss.

Liaoning gasoline engine driven cold water high-pressure cleaning machine

Pressure loss in the upper part of the high-pressure cleaning machine:

On the high-pressure cleaning machine, there is a section of high-pressure water pipe from the outlet of the high-pressure pump to the outlet of the drum, so this is called the pressure loss in the upper part of the high-pressure cleaning machine. This section of high-pressure hose has 4 to 5 joints and elbows, and the high-pressure water rotates rapidly, so the loss usually reaches 5% of the total loss of the cleaning system, which is about 15-20 bar. Although the pressure loss is not significant, when calculating the pressure loss of the high-pressure cleaning machine, the pressure loss at the upper part of the high-pressure cleaning machine should be considered.

Pressure loss of high-pressure cleaning machine nozzle:

Liaoning gasoline engine driven cold water high-pressure cleaning machine

The direct cleaning tool of a high-pressure cleaning machine is a spray gun, as the nozzle generates a high-pressure water jet. It is a tool that converts the pressure energy of a high-pressure pump into velocity energy. The nozzle pressure loss is mainly caused by the local pressure concentration of high-pressure water in the nozzle and sudden changes in dynamic pressure. Pressure loss of high-pressure water at the nozzle inlet; Pressure loss caused by significant changes in nozzle channel cross-section; The pressure loss caused by a sudden change in the direction of water flow in the nozzle; The pressure loss caused by the branching of a single water flow into multiple water flows; The outlet pressure loss caused by the high-pressure water jet formed by the outflow 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 high pressure loss may account for 60% of the total pressure loss of the high-pressure cleaner. The pressure loss of the nozzle part accounts for a large proportion of the total pressure loss of the high-pressure cleaning machine. To reduce the pressure loss of the nozzle, this goal can only be achieved through correct design and accurate production of the internal structure of the nozzle.

Pressure loss in the high-pressure hose section of the high-pressure cleaning machine:

The high-pressure hose section is a long hose that runs from the outlet of the reel to the inlet of the spray gun. The pressure loss of this part of the pipeline accounts for more than 50% of the total pressure loss of the high-pressure cleaning machine, and can even reach 2/3. The pressure loss of this section of the pipeline can be obtained in two ways, one through calculation and the other through experimentation. When calculating, the flowing high-pressure water should be considered as a turbulent state, as 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, the more turns it has, and the greater the pressure loss. In practical applications, if the selection or handling of high-pressure hoses is improper, it will greatly reduce the cleaning effect of high-pressure cleaning machines, and even fail to achieve the original intention at the time of purchase.