Principle of high pressure washing car

High-pressure cleaning vehicles use water as the working medium and consist of two major parts: a booster pump and a power drive unit. Usually, the power drive pump converts ordinary water into high-pressure, low-flow water by completing a suction and discharge process on the water, and then transports it to the high-pressure pipeline so that it reaches the high-pressure nozzle with a certain amount of energy. The aperture of the high-pressure nozzle is much smaller than the diameter of the high-pressure pipeline, so the water reaching the high-pressure nozzle must be accelerated to pass through the nozzle. In this way, the nozzle can convert high-pressure, low-flow water into a low-pressure, high-flow jet. There are three ways to control the size of the water flow rate, by increasing or decreasing the inner diameter of the pump head, by lengthening or shortening the stroke of the plunger. By increasing or slowing down the reciprocating speed of the plunger. Most high-pressure cleaning machines use a set of valves and pump heads to form a system. The plunger pulls water into the inlet valve and pressurizes it to pass through the outlet valve. The valve controls the water through the pump by preventing backflow. The valve consists of a spring and a bracket, and the pressure operation is completed due to the different pressure differences on both sides of the valve. When the pressure acting on the valve is greater than the capacity of the spring, the valve opens.In the reverse stroke, water will automatically squeeze the bracket against the valve seat, keep the valve closed and prevent backflow.

The jet of high-pressure water jets that tangentially or positively impacts the surface of the object (workpiece) being cleaned is called jet operation. High-pressure water jets are the simplest form of energy conversion and application. When the impact force of the high-pressure water jet is greater than the adhesion between the dirt and the surface of the object, the dirt will be peeled off and washed away, achieving a cleaning device that cleans the surface of the object.