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Do you know what is the principle of Volvo excavator tank design?

2020-11-20 09:49:41
a

Hydraulic tank in excavator accessories plays a key role:
1. Static the oil mixed with gas to separate the gas
2, let the heat generated when the system works and the air heat exchange
3. Storage of oil required for circulation of the system
Because these elements let us be cautious in the design of Volvo excavator fuel tank, such as excavator accessories suction pipe end distance from the box wall should be greater than 1.5 times the pipe diameter, the partition must be installed in the tank and so on.So what do these blunt rules mean behind the words?Volvo construction machinery accessories Xiaobian combined with a real case to share with you.
Volvo excavator fuel tank
When loading, the use of excavator accessories internal gear pump (PGH5-21/063) will have an uncomfortable sharp noise, and the product has only a very short service life.Users are very distressed to find the problem, the need for professional technical services.


Volvo excavator fuel tank

Analysis of the field feedback indicates that it is highly likely that the pump has a suction problem
After analysis and troubleshooting system, the problem point was determined to be that the oil suction port and oil return port in the oil tank were too close to each other, and the suction pipe end and return pipe end were not isolated, resulting in the suction pump containing a large amount of gas and impurities of oil return.At the same time, because the distance between the suction pipe end and the return pipe end of the excavator fittings is close, the oil return velocity is high, resulting in the siphon phenomenon of the suction end, which leads to the oil suction is not smooth, and the oil suction pressure becomes negative pressure.
Why does proximity and lack of isolation between suction ports cause this problem?
Give me pause and listen to me.Hydraulic pump back oil is very large, mixed with a large number of gas and impurities......
The oil pump of the excavator parts inhales the return oil liquid containing a lot of gas and impurities, and the return oil has a fast flow rate. The oil absorption capacity of the pump is insufficient, which causes the noise of the pump emptiness and the life of the pump is too large and the life of the pump is short.
Reasonable tank layout, seemingly details, the crux of the problem in the above cases.From the professional point of view of Volvo excavator, this is the case for the general tank arrangement
In this way, the design in the oil tank of excavator fittings gives the oil back with sufficient time to precipitate impurities and time to precipitate air, and also provides a stable oil for oil absorption.To avoid the situation of suction and secondary pollution.



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