Explain the hydraulic excavator excavator after-treatment method

Excavator hydraulic pump after extreme put on we discover the purpose of the malfunction consistent with the subsequent 3 points, and the device to improve:

(1) take a look at the growth cylinder leakage situation. The simplest manner is to elevate the growth to look if there's a clean loose fall. If the whereabouts of apparent elimination of gasoline tank inspection, seals were worn need to be replaced.

(2) take a look at the manage valve. First smooth the protection valve , take a look at whether or not the spool put on, including put on and tear need to be replaced. If there's nevertheless no alternate after set up of protection valve, after which take a look at the manage valve spool put on, the space restrict of use is typically 0.06mm, extreme put on and tear need to be replaced.

(3) measuring excavator hydraulic pump stress. If the stress is low, then make adjustments, the stress remains now no longer adjustable, the severe harm to the hydraulic pump.

In general, the principle motive that the growth can't be lifted is:

a. Excavator hydraulic pump is seriously worn. The pump leaks severely at low speed. When the pump runs at excessive speed, the pump stress barely increases, however because of the pump put on and leakage, the volumetric performance drops considerably and it's miles hard to attain the rated stress. Hydraulic pump paintings for a long term has exacerbated the damage and tear, oil temperature, ensuing in put on and tear of hydraulic additives and seals aging, harm, lack of sealing ability, hydraulic oil deterioration, and ultimately result in failure.

b. hydraulic additives choice isn't reasonable. Boom cylinder specs for 70/forty non-general series, the seals also are non-general parts, excessive production prices and seal alternative inconvenience. Boom cylinder bore is small, the device is certain to set excessive stress.

c. Hydraulic system design is not reasonable. Control valve and full hydraulic steering gear for a single pump in series, safety valve setting pressure points 16MPa, and excavator hydraulic pump rated working pressure is also 16MPa. Hydraulic pump often at full load or prolonged overload (high pressure) work, and the system has a hydraulic impact, long-term oil does not change, the hydraulic oil contaminated, exacerbating the hydraulic pump wear and tear, resulting in hydraulic pump shell burst (was found Such failure).