Analyze the problem of valve heating of small excavator

Analyze the problem of valve heating of small excavator

2020-11-02 10:40:47  edit:xiaoli

Today we will take a look at the impact of valve heating on small excavators.

Analyze the problem of valve heating of small excavator

Cause Analysis of Overheating Failure of Oil Pump, Oil Pump and Oil Cylinder Valve of Small Excavator

1. The pressure of the small excavator system is too high.

2. The small excavator is short of oil.

3. The pressure adjustment height of the unloading valve causes overheating of various valves of the wheel excavator oil pump, oil motor, and oil cylinder.

4. Low efficiency of oil pump for small excavator.

5. There is a problem with the oil cooling system, which leads to overheating of various valves of the wheel excavator oil pump, oil motor, and oil cylinder.

The application field of small excavators is expanding

1. Restart the approval of urban rail transit projects. The rise of multi-rail transit construction boom

One year after the closure, the approval of urban rail transit projects restarted in July. Recently, relevant departments held a board of directors, and the remaining funds were settled by domestic banks; the planning period is from 2018 to 2023. In addition, the total investment in the third phase of the Suzhou urban rail transit project is about 95 billion yuan. It is reported that the Hangzhou Airport Express is awaiting approval and will be approved at the end of August, and construction will begin before the end of the year. The approval of the third phase of the Xi'an Metro project is also in full swing. At the same time, Hangzhou, Chongqing, Nanchang, Shijiazhuang and other cities are speeding up subway construction, and some recently approved projects have also started.

2. Equipment replacement Generally speaking, the service life of construction machinery equipment is about 8 years, and the final sales peak is still in 2011. Starting in 2018, the field of construction machinery will enter the phase of equipment elimination. At the same time, due to strict environmental protection policies, equipment owners will further update their equipment to meet the new emission standards. The new market space will further stimulate the demand for micro-drilling equipment.

Tell you how to judge the resistance encountered by a small excavator when driving?

The main reason for the increase in suction resistance during operation is contamination of the inlet filter, cyclone filter and air filter. Cyclone filters and intake filters are easy to clean and clean in time, but air filters are not easy to choose because they cannot be obtained directly from the engine manufacturer. Other dealers are not able to determine whether the air filter purchased meets the engine's requirements. If the engine directly reduces the engine life and does not directly meet the requirements that affect the reliability of the engine, then you must understand the paper filter by understanding the functions and parameters related to the engine and the air filter. You need to know the filter accuracy of the paper you need to know. It is very important to understand the filtration accuracy and suction resistance requirements of the air filter. The 5um accuracy of the domestic diesel engine intake filter requires an 80m fine filter. The accuracy of the air filter is generally less than 30 m paper feeding accuracy. The air inlet of the 2 m fine filter is less than 20M, so the selected air filter must be the same as the original engine Match the output, economy, and reliability of the filter paper, and the filter paper should have thickness, tensile strength, original resistance, filtration accuracy, etc. If the temperature of the valve of a small excavator is too high, measures should be taken to lower the temperature first, while paying attention to safety.

Copyrigh: MINI Excavators&Crawler Hydraulic Excavator