How is the lubrication performance of hydraulic oil?

January 15, 2024

How is the lubrication performance of hydraulic oil?

Main body

As the lubrication medium of hydraulic system, hydraulic oil is widely used in construction machinery, automotive industry, aerospace, agriculture, construction and other fields, the quality of hydraulic oil is not only related to the operation of equipment, but also related to the efficiency and economic development of production operations in the industry, how to judge the lubrication performance of hydraulic oil? Depends on what the device says!

01 Equipment Noise

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The noise here mainly refers to mechanical noise, which is due to the friction, impact force or non-equilibrium force between the components when the mechanical equipment is running, so that the mechanical parts and the shell vibration and radiation noise. According to the different sound sources can be divided into three categories: aerodynamic noise, mechanical noise, electromagnetic noise.

Equipment noise is best below 85 decibels, there are special work occasions to wear protective equipment, and if the equipment has poor lubrication and other conditions, it will bring abnormal noise, which requires excellent performance of lubricating oil products to protect.

02 Equipment Wear

Equipment wear generally has two forms - visible wear and invisible wear. According to the loss of equipment, it can be compensated by different ways of equipment renewal or transformation.

(1) The physical wear of the equipment is also known as material wear, which is formed by the wear and loss of the equipment entity due to the force or natural force during the use or idling process of the equipment;

(2) The invisible wear of equipment, also known as mental wear, is caused by the continuous emergence of equipment with better performance and higher production efficiency due to scientific progress, so that the value of the original equipment is degraded.

High-quality and suitable hydraulic oil can make the equipment run smoothly, reduce wear, and ensure the stable and efficient operation of the equipment.

03 Oil change cycle

Oil change cycle is a core indicator, no matter the size of the equipment, we hope to be stable and reliable operation, but also hope that on this basis, the lubricating oil in the equipment will be used for a longer time. In addition to special oil occasions, the oil change cycle of general oil equipment has a certain commonality, therefore, in the case of normal maintenance and management of equipment, the oil change cycle also reflects the performance of the lubricating oil to a certain extent.

There are also many factors affecting the oil change cycle, from the initial equipment design, such as the size of the fuel tank, the type of lubrication system, the processing accuracy of the equipment and the rated power and load of the equipment, but also closely related to the actual operating load of the equipment, the use of conditions, the environment.

Therefore, the same oil product is applied in different occasions, such as load size, temperature, environmental quality, etc., which directly affects the length of the oil change cycle. You can control the same equipment, the same working condition, the operating environment, and choose different oil products, such as mineral lubricating oil, synthetic lubricating oil (PAO type, ester type, etc.), to see how the oil change cycle of the equipment is different.

It is worth reminding that it is not the higher the price of the product, the longer the oil change cycle concept, because it also involves the "compatibility" of the oil and equipment, specifically, the quality of the PAO type of product is better than that of the mineral type of product, but it is necessary to consider whether it can not consume or damage the equipment seals.

The extension of the oil change cycle brings about the overall reduction of oil costs, and also reduces the labor cost of oil change. Especially in some high-risk oil change points, greatly reducing the risk of oil change. The longer oil change cycle brings about the continuous and stable operation of the equipment, and is accompanied by comprehensive economic benefits and hidden profits.

04 Equipment Life

The life cycle of the equipment refers to the time experienced by the equipment from the beginning of putting into use to the withdrawal of the use process until it is technically or economically inappropriate to continue to use, which is mainly divided into three types:

(1) The material life of the equipment, also known as natural life. It refers to the time experienced by the equipment from the time it is put into use to the time it is discarded due to physical wear and tear that makes the equipment technically completely lose its use value;

(2) The technical life of the equipment, also known as effective life. It refers to the time experienced by the equipment from the beginning of putting into use to the appearance of new equipment with better performance and higher efficiency due to technological progress, so that the original equipment loses the use value before reaching the material life and exits the use process;

(3) Economic life of the equipment. It refers to the time experienced from the beginning of the equipment being put into use to the end of the use process until it is economically unreasonable to continue using the equipment due to the sharp increase in the cost of use due to the aging of the equipment.

From the point of view of the material life of the equipment, the failure rate of the equipment in the early use is relatively high, because there is a "running-in period" between the oil and the equipment, this period must be in accordance with the recommended lubricating oil quality oil in the equipment manual, in order to ensure the uniformity and effectiveness of the running-in, and greatly reduce the failure rate in the later effective life stage. The effective life stage after normal operation is more inseparable from a reasonable oil change cycle. A reasonable oil change cycle can keep the equipment running in a stable and low failure rate.

During the operation of the equipment, energy is lost when the transmission between the parts, so the transmission efficiency can never reach 100%, so how to improve the energy transmission efficiency is the problem faced by all walks of life.

Starting from the initial equipment, the manufacturing accuracy of the equipment is getting higher and higher, the strength is getting harder and harder, and the matching gap is getting smaller and smaller. From the production process, from the processing technology point of view, step by step to reduce energy consumption, step by step to improve energy transfer efficiency. Of course, there is still friction between the two contact surfaces that are smooth, and it is dry friction as we define it. The next task is to transform dry friction into liquid friction, which is related to the selection of lubricating oil. Excellent lubrication products can greatly reduce wear, improve transmission efficiency, and make the power more abundant.

In addition to the above indicators, you can also refer to the performance indicators and standards recommended by the manufacturer to judge the lubrication performance of hydraulic oil. In addition, regular monitoring and testing of hydraulic oil, such as oil quality analysis, viscosity measurement, acid value detection, etc., can comprehensively evaluate the lubrication performance of hydraulic oil, identify potential problems in advance and take appropriate maintenance measures.

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