How can hydraulic seal suppliers enhance hydraulic seals performance?

Simple Guide to understanding the function of hydraulic seals and its categories

Hydraulic applications are a serious challenge for seals. The hydraulic seal must not only prevent liquid from leaking from the cylinder. But also withstand the effects of high pressure in the cylinder, extreme temperatures and lateral forces. In these applications, the function of hydraulic seal suppliers and hydraulic seals goes far beyond preventing leakage.

Why hydraulic seal suppliers sealing is important for vehicles?

Sealing plays an important role in the reliability of ultra-high-pressure hydraulic technology. This article analyzes:

• the principle and particularity of ultra-high-pressureseals
• introduces the materials and selection principles of pressure seals
• and focuses on several types of hydraulic seals.

Hydraulic cylinder seals: high performance and durability

The sealing of the hydraulic system is achieved by a series of special seals. Similarly, the piston rod seal prevents liquid from leaking from the inside of the cylinder to the outside. While the hydraulic piston seal prevents liquid from flowing out of the cylinder head.

This causes pressure to build up at one end of the piston, allowing the cylinder to expand and contract.
The function of the wear ring is:

• to provide guidance and
• support for the piston and rod of the hydraulic cylinder
• as well as to absorb lateral loads.

At the same time, it can prevent metal contact between the moving parts of the cylinder. Moreover, it also optimizes the performance of the sealing system.

hydraulic seal suppliers install the dust ring and wear ring in the hydraulic cylinder. When the piston rod retracts into the system, it is used to:

• scrape off the dirt
• foreign particles debris
• and moisture on the piston rod to prevent them from contaminating the hydraulic medium.

Subsequently, it also prevents them from damaging the wear rings, seals and other components.

Why do hydraulic seal suppliers make hydraulic cylinder seal?

The hydraulic cylinder seal is a mechanism used to prevent the leakage of the sealing medium. Moreover, it also prevents foreign objects.

such as:

• air
• dust
• and water from entering the hydraulic cylinder during operation.

There are roughly four-cylinder seals for hydraulic cylinders.

1. one is the static seal at the cylinder head and cylinder body
2. the second is the dynamic seal for the piston and cylinder body
3. the third is the piston rod and cylinder head Dynamic seal
4. fourth is the dust seal at the outer end of the cylinder head

You can find these from various hydraulic seal suppliers.

What is the function of hydraulic oil cylinder?

Generally, the hydraulic oil cylinder is the executive power part of the hydraulic power system. The hydraulic oil cylinder is an energy conversion device.

Similarly, it can convert the pressure energy of the sealing liquid into mechanical energy. The structure of the hydraulic cylinder is simple and compact. Moreover, the work is reliable. And the processing, assembly and maintenance are relatively convenient.

What are the types of hydraulic dynamic seals? (according to hydraulic seal suppliers)

According to the role, hydraulic seal suppliers divide hydraulic dynamic seals into 5 categories. They are:

1. piston seal
2. piston rod seal
3. dust seal
4. rotary seal
5. and wear ring.
6. Piston seal

The role of the piston seal is to ensure that the liquid working medium in the hydraulic cylinder will not leak through the end of the piston.

Piston seals usually include unidirectional seals and bidirectional seals. One-way sealing, that is, the pressure acts only in one direction; two-way sealing. Simultaneously, the pressure acts in both directions of reciprocating motion.

2. Piston rod seal

hydraulic seal suppliers consider the piston rod seal is considered to be the most important part of the hydraulic cylinder seal configuration.

When the piston rod makes linear reciprocating motion, the rod seal can effectively prevent the working medium from leaking.

The rod seal is used in conjunction with a dust seal to prevent external dust and dirt from entering the cylinder.

3. Dust seal

In addition to the sealing function of the oil cylinder, the main purpose of the dust seal is to prevent foreign objects.

Such as:

• dust and
• dirt from entering the cylinder.

hydraulic seal suppliers and manufacturers use dust seals with other sealing components to produce a tight fit.

4. Rotary seal

Rotary seal is a bidirectional acting seal ring that can withstand the pressure of both sides. Furthermore, it uses to:

• seal rods
• shafts
• Pins
• rotary joints
• and other parts with rotating or swinging motion.

5. Why Wear ring is popular among hydraulic seal suppliers?

hydraulic seal suppliers use wear ring in the hydraulic cylinder. It can effectively maintain the concentration of the piston. Even the wear caused by the reciprocating movement of the oil cylinder, and apply stress distribution on the seal.

Note:  Piston rod and piston installations usually require wear rings.

Construction machinery is inseparable from the oil cylinder. And the oil cylinder is inseparable from the seal. A common seal is a seal ring, also called an oil seal.

It serves to isolate the oil and prevent the oil from overflowing or passing through.

The common seal rings used in hydraulic cylinders are the following types:

• dust ring
• piston rod seal ring
• buffer seal ring, guide support ring
• end cover seal ring
• and piston seal ring.

The snap-in dustproof ring is the most common in hydraulic seal suppliers. As the name implies, the dustproof ring is stuck in the groove on the inner wall of the end cover. Furthermore, it is used in less harsh environmental conditions.

The material of the snap-in dustproof ring is usually polyurethane. Similarly, there are many variations of the structural form. For example, the H and K-shape cross-sections are double-lip structures. But the changes are inseparable.

The press-in dust wiper is used under severe and heavy load conditions. And it is not stuck in the groove. But the polyurethane material is wrapped with a layer of metal to increase the strength.

There are many forms of press-in dust wiper. Moreover, also divided into single and double lips.

What is piston rod seal ring and why hydraulic seal suppliers make it?

Piston rod seal ring, also known as U-cup, is the main piston rod seal. It installs inside the end cap of the hydraulic cylinder to prevent hydraulic oil from leaking out.

The piston rod sealing ring is made of polyurethane or nitrile rubber. In some occasions, it needs to be used with a supporting ring.

hydraulic seal suppliers use the supporting ring to prevent the sealing ring from being deform under pressure. There are also many variants of piston rod seals.

The special sealing ring for the piston rod is the most critical seal in the hydraulic system. It designs to install at the position of the guide sleeve to prevent the fluid in the system from leaking out of the piston rod.

The leakage of the hydraulic system through the piston rod will greatly reduce the performance of its equipment. Moreover, serious leakage will also cause pollution to the environment.

The special sealing ring for the piston rod generally U-shape lip structure, and the inner lip is low and the outer lip is high.

hydraulic seal suppliers conclusion

The selection of good and reliable hydraulic seal suppliers is vital. The piston rod seal also needs to pay special attention to the problem of its cooperation with the dust ring. In short, choosing best quality hydraulic seal supplier not only saves time but also reduces maintenance cost.