Kaifeng diesel engine driven high-temperature and high-pressure cleaning machine

high-pressure washerThe service life and reliability of the plug seal of the column are of great concern to users, as it directly affects the performance and reliability of the complete equipment. Below, the editor will introduce the advantages and disadvantages of several plunger seals commonly used in cleaning machines. The plunger seal of high-pressure water jet cleaning machine belongs to reciprocating dynamic seal, and its sealing structure and form vary depending on the sealing medium, pressure and flow rate, generally including packing seal, gap seal, combination seal, etc.Kaifeng diesel engine driven high-temperature and high-pressure cleaning machine

1、 Packaging sealing

Packing seal is a sealing form that blocks the leakage channel with packing to prevent leakage. Filler seals are widely used in plunger seals of high-pressure water jet cleaning machines due to their simple structure, easy disassembly, low cost, and reliable performance.

2、 Gap sealing
Kaifeng diesel engine driven high-temperature and high-pressure cleaning machine

Gap sealing is achieved by throttling the small gap between the sleeve and plunger to create a significant pressure drop, thereby achieving a sealing effect. The throttling gap of the gap seal is not formed by mechanical processing, but by the elastic deformation of the initial gap between the sleeve and the plunger under high pressure. Due to the pressure difference between the inner and outer walls of the sleeve, the throttling gap is fixed and converges, achieving the effect of throttling and pressure reduction.

The key to gap sealing lies in the geometric design of the sleeve and plunger, which is crucial for ensuring a reasonable throttling gap under high pressure. So there are high requirements for the design, processing, and assembly of raw materials. The axial dimension of the plunger is long and difficult to process. It is rarely used for plunger sealing in cleaning machines with pressures below 100MPa, and is mostly used for plunger sealing in high-pressure cleaning machines or superchargers.

3、 Combination seal

The combination seal of the cleaning machine is a combination of gap seal and packing seal, that is, the gap and seal control the leakage of high-pressure medium through the pressure deformation of the floating sleeve in the high-pressure area, and the low-pressure area uses secondary contact seal to control the leakage.

Through reasonable structural design, combined sealing can integrate the advantages of gap sealing and packing sealing, achieving good sealing effect. Due to the fact that this sealing structure also inherits the disadvantages of gap sealing, combination sealing is generally used for plunger sealing in cleaning machines or water jet cutting equipment, but this sealing form is rarely used for plunger sealing in high-pressure cleaning machines

high-pressure washerThe service life is closely related to regular maintenance, and proper maintenance can increase the service life of equipment. How to maintain it? The following are common maintenance issues.

How to maintain the high-pressure cleaning machine in winter

1. Before using the cleaning machine in winter, the power equipment must be checked daily to ensure the normal supply of fuel, oil, medium, and cooling water. The belt should be properly tightened and free from damage such as peeling or cracking; All protective devices are safe, reliable, and undamaged. Control cables and prime mover control devices must be checked daily.

2. Before starting up, check the low-pressure inlet pipeline of the cleaning machine to ensure a certain water pressure and appropriate flow of water. During operation, there should be sufficient water supply from the water tank, and there should be no rust or dirt inside the water tank. The filter must be regularly inspected to ensure that it is not clogged or damaged. When inspecting and replacing the cleaning filter, take strict precautions to prevent solid particles from entering the pump and nozzle through the inlet pipe. The filtration accuracy and filtration area of the filter should be adapted to the requirements of the equipment for water quality and quantity.

3. Before installing the cleaning machine nozzle, rinse the equipment pipeline with water to ensure that the nozzle is not blocked or damaged, and that the nozzle connection thread is intact and undamaged.

4. Special protection should be taken for electrical equipment during the operation of the cleaning machine. Before each use, all electrical boxes, connectors, knobs, cables, instruments, and meters must be checked for damage. This inspection should be routine once a day to ensure that they will not be damaged by water or abrasive erosion during operation. All electrical connectors should be properly placed.

5. When the high-pressure cleaning machine is used in a cold environment, anti freezing measures must be added. The specific method is to remove the spray gun (nozzle), insert the water outlet pipe into the water supply tank, start the machine and circulate the anti freezing agent in the equipment pipeline. If the water in the pump or hose of the cleaning machine has already frozen, it must be de iced to ensure that there is no ice residue in the equipment before restarting.