What are the optimization methods for the lip size of the Y ring seal surface?

What is the optimization method for the "lip size" of the Y-ring seal surface? The pressure of Y-ring YXD for the standard hole of the mechanical part of Dongsheng seal is generally 40MPa, and the working conditions of the medium include hydraulic oil, flame retardant fluid, water and gas. Applications include standard cylinders, machine tools, and hydraulic presses.

After the Y-ring is installed, the lip sealing position and the contact table have a certain margin, and the default sealing force appears to achieve the sealing effect. The default surplus is too large, which will lead to an increase in the friction between the lip and the moving contact surface of the sealing ring, and the position of the lip is easy to wear, and the service life of the sealing ring will be shortened. The default turbulence is small, the preload between the sealing lip and the moving contact surface is small, and the sealing effect is not ideal, and even does not meet the ultra-ultra-high pressure seal. When the working pressure is small, it can be considered that the sealing ring product is used in a non-pressure state, and the sealing force at this time is only the contact preload between the sealing lip and the moving contact surface; When the pressure is high, it is necessary to consider not only the bias size of the sealing lip, but also the corresponding increase in thickness size, so as to improve the bending resistance of the sealing lip.

The sealing lip of the Y-ring can be formed by stamping or mechanical cutting. When the lip size is small or the size is particularly large, it is generally used for stamping. When the cutting method is applied to cut the lip, a special tool is required, and there is an additional process, and the production cycle is long.

The standard O-ring can be measured with a conical mold, put the O-ring on the cone, and use gravity to fall naturally, you can measure the inner diameter of the O-ring, as for the wire diameter, you can use the three-coordinate measurement, the original O-ring is elastic, the accuracy is not very high, the size changes greatly after stretching, if you feel that the vernier caliper measurement is not accurate enough, you can use the three-coordinate projector, but I personally don't think it's necessary.

Hello! The lip seal is commonly known as the skeleton oil seal!

The utility model relates to a seal, in particular a rotating shaft end face sealing ring. comprise a sealing body that is provided with an outer sealing lip and an inner sealing lip on one side, and is characterized in that: the other side of the sealing body is provided with an annular groove; The sealing body is set to H shape; The width of the sealing body is greater than the width of the annular groove that the bearing housing end face is arranged; After assembly, an interference fit is formed between the seal body and the housing end face.

It has the characteristics of being able to effectively prevent external dust or muddy water from entering the body, and can effectively prevent the grease in the body from leaking out of the body, and can be installed in the narrow space at the outer end of the bearing seat and shaft after the bearing is installed, and it has the advantages of simple structure, easy installation, and lower processing accuracy requirements for the mounting groove and sealing parts than other seals.

XB7331 This is the common material code of an automobile Yubi industry.

Rotation axis lip.

Sealing ring rubber.

Material. 1.Full tags:

Sealing ring land rental rubber XA8433 HG T 2811-19962Usual markings: (Ibid.).

3.Simplified tagging:

Sealing Rubber XA8433

4.Commonly used grades:

Class A nitrile rubber-based XA7453, XA8433, XA7441B class acrylic rubber-based: XB7331

Class C silicone rubber-based XC7243

Class D fluoroelastomer based XD7433, XD8423

The sealing ring is a kind of rubber ring with a circular cross-section, which is called an O-shaped sealing ring because of its O-shaped cross-section. It is one of the most widely used in hydraulic and pneumatic transmission systems.

It is widely used in the gearbox, drive axle and other components of construction machinery, such as the front and rear output shafts of the gearbox, the main reducer of the drive axle, the wheel side, etc., its function is to isolate the oil cavity from the outside world, seal the oil internally, and prevent dust externally.

1) Reliable sealing performance;

2) Small friction resistance and stable movement;

3) Good pressure resistance, wide range of applicable pressure;

4) Simple structure, low cost;

5) Easy to install.