World

Study Proves the Importance of Correct Selection of Excavator Cylinder Seals

Published

4 years ago

May 16, 2019

The working condition of the excavator cylinder is very hard. Challenges are as follows: the working pressure of the hydraulic system is large; the impact pressure is relatively high; the lateral load is large; the working temperature and the moving frequency are relatively high. Therefore, the performance of the excavator cylinder will have a direct impact on the quality of the entire machine.

Excavator cylinder components mainly include: a cylinder, piston, piston rod, bumper, external seals and standard parts.

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1. Piston seals

The seal of the piston is composed of a wear ring, an anti-pollution seal ring and a combined seal ring.

The wear ring can support and guide the piston to avoid eccentricity or scratching, and it has a certain effect on enhancing the durability of the seal. The support belt must be a product with high load carrying capacity.

Wear ring for the general use of cloth to strengthen the interlayer phenolic resin. It has good wear resistance and bearing pressure. The pressure of the phenolic cloth guide belt can reach 300Mpa, which is ten times that of the Teflon bronze guide belt. The anti-pollution sealing ring can effectively avoid the oil mixing in the cylinder. Impurities cause damage to the seal. And to provide a guarantee for the life of the seal.

The material of the anti-pollution sealing ring is a polytetrafluoroethylene resin with good immersion impurities. It has a slit and a hydraulic bypass groove in the structure, which can effectively avoid the accumulation of oil pressure.

Two-way combination seals are often used in cylinder piston seals because they save space.

2. Sealing of the piston rod

The sealing structure of the piston rod includes: a sealing ring, a buffer ring, a retaining ring and a dust seal.

The seal ring has the function of sealing hydraulic oil. There is a high demand for the choice of sealing ring material, which not only has good impact resistance, wear resistance and crush resistance but also has superior sealing properties. The buffer ring acts as a buffer for decompression of the high pressure oil in the high pressure oil, thereby further reducing the pressure of the main seal. There is a retaining ring at the bottom end of the seal, which has strong anti-squeezing ability, so it can effectively prevent the buffer ring from being squeezed. In addition, the pressure generated by the retaining ring and the main seal can lubricate between the piston rod and the guide sleeve. Friction, but this requires that the buffer ring must have a reflow property to prevent excessive pressure between the buffer ring and the main seal. Therefore, the material of the buffer ring must have good wear resistance and crush resistance. Impact resistance.

The dust ring not only effectively isolates the dust, it also protects the equipment, and it also protects against oil. The movement of the live rod in the guide sleeve requires a certain oil film to be lubricated. The outer lip of the dust ring is likely to cause the oil film to aggregate to form an external leak. Therefore, this requires the inner lip of the dust seal to have a certain anti-scratch effect, hinder the leakage of the oil film.

3. Static seals

Excavators are sealed with O-rings, using nitrile rubber as raw material, and Shore hardness is in the range of 75-90. Because of the high system pressure, the 0-ring needs to be added with a retaining ring to avoid the occurrence of the O-ring being squeezed into the fit gap.

Standard of the sealing performance:

(1) Clearance of the seal ring

In the piston seal and piston rod seal, there is a certain gap between the movements. Factors affecting the gap size include: system pressure, seal material and section thickness, dynamic edge diameter and environmental degree. If the gap is large, not only will the tearing of the sliding edge of the seal root and the stationary side cause the root to be squeezed out, causing the seal to fail. Therefore, the size of the gap has a direct impact on the sealing performance, service life and processing cost of the seal.

(2) Guide belt width

Depending on the use of the guide belt to allow deformation, the corresponding curve can be selected, and the smaller telescopic deformation can ensure the guiding effect. The minimum guide strip width can be determined from the corresponding values and formulas, and then the appropriate guide strip width can be selected.

(3) Assembly and inspection of oil cylinders

When assembling the cylinder, firstly, the parts of each part are separately loaded into the relevant components, and then installed from the inside to the outside.

It is important to choose the correct excavator cylinder seal. YBAS offers professional and high quality seal kits.

World

Five Benefits of Studying Disaster Management

Published

1 month ago

August 16, 2023

Jenny Jackson

Are you concerned about helping your fellow human beings, especially when they most need it? The pictures and news about floods, earthquakes, and other disasters are horrendous. Even worse is seeing the people in those areas deprived of the basic necessities of life. If you’re ready to help limit the negative impacts of such disasters, now is the best time to prepare!

A disaster management degree is one of the best ways to achieve this purpose. It will lead to a career choice that is very demanding but potentially very rewarding as well.

As a disaster management worker, you will help people most affected by disasters. You will also help disaster-prone groups to prepare and plan for future emergencies. Overall, one can say that this is a specialized area with specific requirements. You require both practical experience and academic qualifications to advance in this field.

However, is disaster management a suitable career? There are a few factors that influence the desirability of any career path. Personal growth, career growth, self-satisfaction, and a reasonable expected salary are all essential considerations. Without further ado, here’s a look at some of the motivations for studying disaster management:

1. Your Work is to Help People

Most people see the effect of disasters on their screens and question why go into disaster management? And you might be one of them now. But a disaster management degree helps you reach out to the affected people more effectively. Yes, everyone can send in donations, prayers, and other forms of aid. However, managing the relief campaigns and actively assisting victims is much more gratifying. This reward alone answers the question.

Helping victims gain some footing again

When a disaster strikes, many people can lose everything they have. They might not have their homes, loved ones, and means of living anymore. A disaster management worker can directly do a lot for such victims.

Their degree and experience can help people restore their lives to normalcy. Distributing food and other essentials is just one step. After that, disaster management also helps victims get some source of livelihood, shelter, and whatever they need to piece their life back together. Such efforts also go a long way in assisting victims to recover emotionally from a disaster.

2. It Counts as Highly Skilled Work

If you start working in disaster management with a relevant degree, you are a highly skilled worker. Here are a few reasons why this is so:

You are required to complete formal qualifications, along with technical training sessions
This career path appreciates technical skills as well as experience
Disaster management requires a high skill level that not everyone can achieve

What are the advantages of a highly skilled career?

The main advantages of such a career, including disaster management, include:

Further opportunities due to one’s technical knowledge and expertise
Enhanced experiences while working
Better pay than many other career paths
A feeling of satisfaction due to doing something worthwhile

3. An Exciting Path

Working within a crisis or inside a disaster zone is dangerous but exciting. There might be a lot of chaos sometimes, with extremely changeable situations.

It can also be very difficult to respond to disasters, so you might have to work on adrenaline half the time. It’s all very demanding, but an adventurous soul will probably relish the experiences.

Not everyone is not a perfect fit for this line of work. The stress and demands can get too much at times, adversely affecting the mental health of many workers. If you relish the idea of helping those in need no matter what, make sure to take a break when you need it.

4. Working in Different Locations

Getting stuck in a dead-end job is no fun. When you get a qualification in disaster management, your career will certainly not be boring.

Among other factors, one reason for this is that disaster management takes its workers to several different locations. You might visit a metropolitan city one day and a completely rural setting the next. Some disaster management careers might even take you out of your home country. It won’t be a vacation, but you will get exposure to many different cultures, lifestyles, work methods, and much more. Overall, you’ll probably get a rich and fulfilling experience that’s rare in any career choice.

5. Chances of Growth

With disaster management as your career choice, you have a lot of room for growth. This sector includes large industries operating all over the globe and in all kinds of settings. Many companies and teams always search for a qualified, sincere individual who wants to work in this line.

If you start at the bottom of the disaster management sector, you may get support and lower-level positions first. It is the perfect time to learn all you can and gain experience within the field.

As you grow within this sector, you can get better qualifications and experience in the technical areas. Eventually, you can rise in the field and start working on different projects.

If you work smartly, you don’t have to get stuck at a certain point in your disaster management career. You can work on the most well-known natural disasters as they happen or focus on lesser-known disasters and build your niche.

Conclusion

Studying disaster management and following a subsequent career might create a great path for many people. The education and experience here will show you how to help people in the worst situations. That path alone can make an individual feel satisfied and happy with their choices.

A disaster management degree will also put you in the highly skilled job category. It usually pays well, with some growth prospects to sweeten the pot. This career may also allow you to travel and get experience in new places. Overall, it seems like studying disaster management can be an exciting and sensible career option. If the above discussion seems interesting, why not check out some relevant courses today?