In the field of modern engineering machinery, high performance and high efficiency have always been the development theme of engineering machinery. However, to achieve this goal, it depends on the quality of many core components, among which high-pressure hydraulic hose is an indispensable part. As an important part of engineering machinery equipment, the performance of hydraulic hose is directly related to the operating efficiency and safety of the equipment. This article will explain in detail the characteristics, applications and precautions when selecting high-pressure hydraulic hoses.

 

Definition of high-pressure hydraulic hoses

 

High-pressure hydraulic hoses are a flexible pipe used to transport hydraulic fluids and are widely used in many fields such as construction, mining, and agricultural machinery. In these applications, hydraulic hoses are responsible for transmitting the pressure generated by the hydraulic pump to the actuators of the engineering machinery to realize various mechanical functions. Its basic structure consists of an inner layer of rubber, an intermediate reinforcement layer (usually braided or wound with steel wire) and an outer layer of rubber.

 

Differences between steel wire braiding and winding technology

 

Hydraulic hoses are usually reinforced by steel wire braiding or winding to improve pressure bearing capacity. Steel wire braiding and steel wire winding each have their own unique advantages and application scenarios.

 

1. Wire braiding technology:

 

Wire braided hydraulic hoses are cross-woven with one or more layers of high-strength steel wire as reinforcement materials. Its advantages are simple structure, light weight, and good flexibility. In addition, since the braiding process can adapt to hoses of various sizes, its application range is very wide. Braided hoses are particularly suitable for medium and low pressure systems, and are favored by users for their fatigue resistance and anti-twisting characteristics.

 

2. Wire winding technology:

 

Compared with the braiding process, the wire winding hydraulic hose uses multiple layers of steel wire (usually 4 or 6 layers) to wrap at a specified angle, and alternately wind between the inner and outer layers of the hose, which is different from the braided cross structure. Its main advantage is that it has extremely high pressure resistance and wear resistance, and is suitable for use under high pressure and even ultra-high pressure conditions. Typical applications include hydraulic systems of heavy equipment.

 

Main performance characteristics of hydraulic hoses

 

When selecting and using hydraulic hoses, understanding their performance characteristics is a prerequisite for ensuring safety and efficiency.

 

1. Pressure resistance:

 

The pressure resistance of high-pressure hydraulic hose is one of its core features. Usually, its pressure resistance is determined by the quality of the inner rubber layer and the braiding or winding structure of the interlayer steel wire. In the actual application of construction machinery, it is crucial to choose the appropriate pressure resistance standard to cope with the specific working environment.

 

2. Oil resistance:

 

Oil resistance is an important performance indicator of hydraulic hose, which is directly related to the life and performance of the hydraulic system. Usually, the inner layer made of oil-resistant rubber material can effectively resist the corrosion and swelling of hydraulic oil and ensure the stability of the hydraulic system.

 

3. Anti-aging and corrosion resistance:

 

High-performance hydraulic hoses have excellent anti-aging and corrosion resistance. The outer rubber has good resistance to ultraviolet rays and oxidation, and can maintain long-term use without brittle cracking and deformation.

 

4. Working temperature range:

 

Due to the influence of the use environment and hydraulic medium, hydraulic hoses must have a wide working temperature range. High-quality hydraulic hoses can usually withstand working requirements from -40 degrees to 100 degrees or even higher temperatures.

 

Application of hydraulic hoses in construction machinery

 

Hydraulic hoses play an important role in construction machinery, including but not limited to excavators, loaders, bulldozers and other equipment. Its wide application is due to its excellent performance and reliable quality.

 

1. Hydraulic system of excavator:

 

In excavators, the hydraulic system is one of the core driving forces. Hydraulic hoses are responsible for transmitting pressure oil between the hydraulic pump and the actuator to achieve the lifting, extension and rotation of the boom, dipper, bucket and other parts.

 

2. Power transmission of loaders:

 

The hydraulic hoses in loaders are mainly used for the transmission of hydraulic power of the entire machine to ensure the smooth implementation of the loading, transportation and unloading functions of the bucket. In addition, its high pressure resistance and wear resistance are very suitable for the loader to operate continuously under complex terrain conditions.

 

3. Hydraulic control of bulldozers:

 

Bulldozers also rely on hydraulic hoses to achieve precise control of the blade. The pressure-resistant and oil-resistant properties ensure the stability and efficiency of bulldozers in long-term operations.

 

Key points to note when choosing high-quality hydraulic hoses

 

Choosing the right hydraulic hose is essential to extend the service life of the equipment and maintain operational safety.

 

1. Pressure rating:

 

Choose the right hose specification according to the working pressure required by the equipment, and ensure that its pressure rating is higher than the actual system working pressure. In addition, we should pay attention to the bursting pressure, and choose hoses with sufficient margin for pressure resistance for long-term work.

 

2. Inner diameter and outer diameter:

 

The inner diameter and outer diameter of the hose directly affect the pressure loss and flexibility of the liquid flow. Choose the size reasonably according to the installation space and operation requirements of the equipment.

 

3. Pay attention to the working environment:

 

Understand the working environment of the equipment and choose hoses with anti-aging, high temperature resistance, and UV resistance to cope with the test in different environments, especially when working in high temperature or cold areas outdoors.

 

Future development trend of hydraulic hoses

 

With the increasing demand of modern industry, the new technology research and development of hydraulic hoses will be committed to the use of higher molecular weight composite materials and more advanced fabric reinforcement technology to pursue more excellent pressure resistance, wear resistance, corrosion resistance and environmental protection performance. The new materials and new processes that are constantly developing will raise the upper limit of engineering machinery performance, burst out more potential, and provide new possibilities for future high-efficiency and energy-saving needs.

 

In summary, high-pressure hydraulic hoses are one of the key links in the efficient operation of modern engineering machinery. Through careful consideration of its materials, technology and performance, it can not only greatly improve the durability and reliability of the equipment, but also significantly reduce the maintenance cost and downtime of the equipment, bringing higher economic benefits and use experience to engineering machinery users.