What is Y-shaped sealing ring？

Let’s briefly introduce the structure and function of the Y-shaped sealing ring, as well as the difference between the shaft and the hole.

Introduction

Y-shaped sealing ring is a commonly used seal. It adopts a cross-section design similar to the letter “Y”, which can effectively seal the sealing interface of mechanical equipment and ensure the normal operation of mechanical equipment.

The structural characteristics of a Y-shaped sealing ring

Structure

In the cross-sectional shape of the sealing ring, there are three sides which are the filling side, the compacting side and the inner bottom side. The filling side is used to fill the gap of the sealing groove, the compacting side can use external force to increase its sealing performance, and the inner bottom side is used to enhance the ability of the sealing ring to resist pressure and distortion.

The Y-ring is an annular sealing element made of rubber material. It usually consists of two main parts, the sealing lip and the support ring. The sealing lip is the inner side of the seal ring that makes contact with the shaft or bore and forms a seal. The support ring is the outside of the seal, which supports the sealing lip and maintains the shape of the seal.

The sealing lip of the Y-ring usually consists of two parts, the lip and the back. The lip is the inner side of the seal that makes contact with the shaft or bore and forms a seal. The back is the outer side of the lip, which is in contact with the support ring. The angle between the lip and the back is called the lip angle, and the larger the lip angle, the better the sealing performance of the sealing ring. A support ring usually consists of two parts, the base and the waist. The base is the inner side of the support ring, which supports the lip. The waist is the outside of the support ring, which is in contact with the shaft or hole.

Characteristic

The Y-shaped sealing ring has better sealing performance, high temperature resistance and wear resistance, and can also adapt to the requirements of high-speed rotation and has certain elasticity;

Two distinguishing criteria

According to different purposes, it can be divided into two types: shaft use and hole use.

The sealing ring for the shaft is usually made of elastic rubber material, which can well withstand external factors such as friction and vibration, and also has excellent sealing performance and wear resistance, which can effectively prevent the leakage of liquid and gas.

1. Y-shaped sealing ring for shaft

The Y-shaped sealing ring for the shaft (it can be called the Y-shaped seal, Y-shaped oil seal or diaphragm, diaphragm, etc.) refers to the Y-shaped sealing ring used on the shaft. Its lip is generally arc-shaped, the lip angle is small, and the sealing performance is good. The support ring has a wider base, which supports the lip and maintains the shape of the seal while preventing the seal from sliding or rotating on the shaft. The size of the shaft Y-type seal ring is usually determined according to the diameter of the shaft and the sealing requirements.

The sealing ring for the hole is usually made of elastic rubber or plastic material, which is suitable for many occasions such as pipeline sealing and piston sealing.

2. The Y-shaped sealing ring for the hole refers to the Y-shaped sealing ring used on the hole. Its lip is generally flat, with a large lip angle and poor sealing performance. The support ring has a wider waist, which supports the lip and maintains the shape of the seal while preventing the seal from sliding or rotating over the bore. The size of the Y-ring for the hole is usually determined according to the diameter of the hole and the sealing requirements.

Y-shaped sealing ring is an indispensable seal in modern machinery manufacturing. It has the advantages of simple structure, good sealing performance, high temperature resistance, and wear resistance. , More stable operation.

3. How to distinguish the Y-shaped sealing ring for the shaft and the hole

In practical applications, it is very important to distinguish the Y-shaped sealing rings for shafts and holes, because if they are used incorrectly, the sealing effect will be poor, or even unable to achieve the sealing effect.

A Distinguished by lip shape

The lip of the shaft Y-ring (also called Y-seal, Y-seal or diaphragm, diaphragm, etc.) is generally arc-shaped, while the lip of the hole Y-ring is generally flat. Therefore, the Y-ring for the shaft and the Y-ring for the hole can be distinguished by observing the lip shape of the sealing ring.

B Distinguished by the shape of the support ring

Y-rings for shafts have a wider back-up ring, while Y-rings for bores have a wider waist. Therefore, the Y-ring for the shaft and the Y-ring for the hole can be distinguished by observing the shape of the support ring.

C Distinguishing according to the installation location

The shaft is installed on the shaft with a Y-shaped sealing ring, and the hole is installed in the hole with a Y-shaped sealing ring. Therefore, the Y-shaped sealing ring for the shaft and the hole can be distinguished by observing the installation position of the sealing ring.

D differentiated by size

The Y-rings for the shaft and the bore are of different sizes. The size of the Y-ring for the shaft is usually determined according to the diameter of the shaft and the sealing requirements, while the size of the Y-ring for the hole is usually determined according to the diameter of the hole and the sealing requirements. Therefore, the Y-shaped sealing ring for the shaft and the hole can be distinguished by observing the size of the sealing ring.

In conclusion, it is very important to distinguish between shaft and bore Y-rings because of their different structures and functions. By observing the lip shape of the sealing ring, the shape of the support ring, the installation position and size, etc., it is easy to distinguish the Y-shaped sealing ring for the shaft and the hole. When selecting and installing the Y-shaped sealing ring, the appropriate sealing ring should be selected according to the actual use requirements and relevant standards, and installed and used correctly to ensure the sealing effect and the normal operation of the equipment.