High pressure hot water washing machine repair and maintenance
High Viscosity Pump,Pump For High Viscosity Fluid,Pumps For Viscous Liquids,Viscosity Pump Hengshui Yuanhan Trading Co.,Ltd , https://www.hengshuiyuanhanpump.com
1, the working principle of high temperature and high pressure washer maximum pressure up to 200 bar, the maximum temperature of 140 degrees Celsius. In order to realize the high temperature and pressure of the water, the washing machine first uses tap water (water pressure not less than 1 bar) driven by a three-phase motor to pressurize the high pressure to a high pressure after three stages, and then heated by a fuel (diesel) heater, finally It is ejected by a high pressure spray gun.
2, the structure of high-temperature high-pressure cleaning machine structure shown in Figure 1.
Figure 1 High-temperature and high-pressure cleaner structure
1 Trademark; 2 water inlet; 3 rear wheel; 4 cleaning agent nozzle; 5 high pressure water pipe; 6 power cord; 7 temperature control switch; 8 power switch; 9 high pressure water gun; 10 shield; 11 front wheel; 12 chassis; Motor, High Pressure Pump Assembly; 14 Heater; 15 Fuel Injector, Ignition Electrode Assembly; 16 Chimneys; 17 Handrails for Arms; 18 Fuel Tanks; 19 Gunstocks; 20 Fuel Filters; 21 Oil Pumps; 22 Fans; 23 High Pressure Ignition The coil is familiar with its structure and working principle. The cleaning machine is divided into the following components:
2.1 Waterway:
In the waterway, adjust the regulator pressure regulator knob to adjust the size of the return water to adjust the water pressure. The heating pipe is composed of a spiral steel pipe around the heater. When the burner ignites and burns, the flame heats the water in the pipe.
2.2 Oil Road:
In the oil circuit, the oil pump is a motor-driven planetary gear high pressure oil pump. When heating and burning, the solenoid valve is opened, high-pressure diesel is sprayed into the combustion chamber of the heater after being atomized by the nozzle, and is ignited by the electric spark between the high-voltage electrodes and burns and heats.
2.3 Wind Road:
Fans and oil pumps are generally driven by the same motor. Adjust the throttle size to adjust the combustion conditions.
2.4 Circuit:
The circuit is shown in Figure 2.
Figure 2 High temperature and pressure washer circuit
In the figure, the power switch (IG) has an overload protection function. When the cleaning machine breaks down and the current in the circuit increases, the power switch is automatically disconnected to ensure safety. The pressure switch (PR) is installed in the high pressure water pump. Only after the high pressure water pump is running and the cold water is pressurized to a certain temperature, the pressure switch contact is closed. Adjust the temperature control switch knob to adjust the outlet water temperature. When the water temperature reaches the set temperature, the temperature control switch contact (TC) is disconnected and the heating is stopped. The sensor probe of the temperature switch is installed at the water outlet. It can be seen from the figure that when the main power is turned on, the water pump motor (MP) operates to pressurize the cold water. Turn on the heating switch (IB), and the oil pump motor (MB) operates to pressurize the fuel and drive the fan to rotate. At this point, the primary high-voltage ignition coil (ELET) is energized, and the secondary generates high pressure. The high pressure causes ionization of the air between the ignition electrodes, resulting in cremation. The ignition frequency is the power frequency, ie, 50 Hz. At this time, whether there is fuel spray, depending on whether the pressure switch and the temperature control switch contact are closed, only two contacts are all closed, the fuel solenoid valve (EVG) is turned on, and the fuel is sprayed out so as to ignite and burn. When the water temperature is heated to the set temperature, the temperature control switch contacts are opened, the fuel solenoid valve is de-energized, the fuel path is cut off, and fuel injection and heating are stopped. After the water temperature is lowered, the temperature control switch contacts are closed again, and the fuel injection heating process is repeated, so that the high temperature and high pressure of the water can be obtained.
3. Routine maintenance In order to extend the service life of the cleaning machine, daily maintenance is critical and must be strictly implemented:
1) Check the level of the lubricating oil in the crankcase of the high pressure pump every day, and replace the lubricant once in three months;
2) Clean the influent filter once in two weeks;
3) Clean the fuel nozzle and ignition electrode assembly once a month;
4) Replace the fuel filter in March;
5) Wash and remove the high pressure oil pump in March.
4. Troubleshooting When using the cleaning machine, it is inevitable that there will be a failure. When a problem occurs, the cause should be carefully searched for based on different symptoms.
1) Spray gun does not spray water
a) The water inlet and the inlet filter are blocked.
b) The nozzle is clogged.
c) Plug the heated spiral tube and remove scale if necessary.
2) Unstable water pressure
a) Insufficient water supply.
b) The air intake line is caused by broken pipes, detergent not inserted into the cleaner, etc.
c) The nozzle is worn.
d) Leakage from the high pressure water pump seal.
3) Burner does not ignite and burn
a) Insufficient air intake and white smoke.
b) Dirty plugs of fuel filter, fuel pump, fuel nozzle.
d) Damaged solenoid valve.
e) The position of the ignition electrode changes and the spark is too weak.
f) Damage to the high voltage ignition coil.
g) Damage to the pressure switch.
The above problems occur in the high-temperature and high-pressure cleaners. Users can find out the causes and troubleshoot them. However, if there is a serious failure such as leakage of the pump body and leakage of the crankcase, the cleaning machine should be sent to a professional maintenance department with complete accessories and strong technical force to avoid unnecessary economic losses.