What is a seal ring?

The sealing ring is a ring seal with a notch, which acts as a seal on the inner hole wall of the stationary part by virtue of its elasticity after being pressed. The sealing ring is a ring seal with a notch, which is placed in the ring groove of the sleeve, the sleeve rotates with the shaft, and the sealing ring is pressed against the inner hole wall of the static part by the elasticity of the gap. Effect.

Common seal ring material

1. Rubber seal ring

Rubber sealing ring is a common sealing material. It has excellent elasticity and wear resistance, and can adapt to different working environments. There are also many types of rubber sealing rings.

2. Polyurethane (PU) sealing ring

Polyurethane sealing ring is a kind of high performance sealing material. It has extremely high strength and wear resistance, and is suitable for high temperature, high pressure and high speed working environments. Polyurethane seals have a longer service life than rubber seals.

3.Polytetrafluoroethylene (PTFE) seal ring

Polytetrafluoroethylene seal ring is a kind of sealing material with high chemical stability. It has excellent corrosion resistance and high temperature resistance and is suitable for sealing in acid and alkali environments and high temperature environments.

4. Metal sealing ring

The metal sealing ring is a sealing element made of metal material. It has excellent pressure resistance and high temperature resistance, suitable for sealing under high pressure, high temperature and strong corrosive environment. There are also many types of metal seals.

5. Ceramic sealing ring

Ceramic sealing ring is a kind of sealing element made of ceramic material. It has excellent corrosion resistance, wear resistance and high temperature resistance, suitable for strong acid, strong alkali and high temperature environment sealing.

6. Graphite seal ring

Graphite sealing ring is a sealing element made of graphite material. It has excellent corrosion resistance, wear resistance and high temperature resistance, suitable for strong acid, strong alkali and high temperature environment sealing.

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Advantages of sealing rings

1. It has good mobility and adaptability, can compensate for large tolerances and Angle deviations, can prevent internal grease or oil from leaking out, and can also prevent the intrusion of external splashing or dust.

2, with good sealing performance, and with the increase of pressure can automatically improve the sealing performance.

3, the friction should be small, the friction coefficient should be stable.

4, strong corrosion resistance, not easy to age, long working life

5, good wear resistance, after wear can be automatically compensated to a certain extent.

6, simple structure, easy to use, maintenance, correct maintenance can be used for longer.

7, the thermal shrinkage effect should be small, it should be easy to process and form, and it can maintain a precise size, does not corrodes the contact surface, and does not pollute the medium.

Requirements for making sealing rings

1. The sealing ring needs to have sufficient strength and stiffness.

It is not easy to damage under long-term working conditions, will not produce serious deformation, and can still maintain sealing when it is not very stable.

2. The sealing ring must also have corrosion resistance.

Because some media will have the ability to corrode the sealing ring, according to its chemical properties.

3. The sealing ring must also have good heat resistance and impact resistance. So the choice of materials has a good heat resistance.

4. The sealing ring must also have a small coefficient of friction and a certain lubrication ability, and the sealing ring material and the bee fluid must also have good infiltration. Dry grinding of the pump is not easy to damage such sealing rings.

Precautions for using sealing rings

1. Do not install the wrong direction and damage the lip.

If there are more than 50¦Ìm bruises on the lip, it may cause significant oil leakage.

2. Prevent forced installation.

Can not be struck with a hammer, but to use special tools to first press the seal ring into the seat hole, and then use a simple cylinder to protect the lip through the spline. Before installation, apply some lubricating oil on the lips to facilitate installation and prevent burns during initial operation, and pay attention to cleanliness.

3. Prevent overdue use.

The use period of the sealed rubber seal is generally 3000 ~ 5000h, and the new sealing ring should be replaced in time.

4. Replace the sealing ring with the same size.

In strict accordance with the requirements of the instructions, the sealing ring of the same size should be selected, otherwise the requirements of compression can not be guaranteed.

5. Avoid using old sealing rings.

When using the new sealing ring, it is also necessary to carefully check its surface quality to ensure that there are no holes, bumps, cracks and grooves and other defects and sufficient elasticity before use.

6. When installing, the parts of the open hydraulic system should be strictly cleaned first, and it is best to use special tools to prevent the metal sharp edge from scratching the fingers.

7. When replacing the sealing ring, strictly check the groove of the sealing ring, remove dirt, and polish the bottom of the groove.

8. In order to prevent damage resulting in oil leakage, it must be operated according to regulations, and at the same time, the machine cannot be overloaded for a long time or placed in a harsh environment.