Y-ring Good Pressure, The Use Of A Wide Range Of Pressure
Y-ring interface Y-shaped, is a typical lip ring. The interface of the high and wide ratio of different, can be divided into wide narrow type, Yx type several categories. Y-ring can be divided into two kinds of shaft and hole. Y-ring is widely used in reciprocating devices, the service life is higher than the O-ring, Y-ring for the pressure is not greater than 40MPA, the working temperature of -30 ℃ to 80 ℃, the use of nitrile rubber production of 0.01 M to 0.6 m / s; fluorine rubber for the 0.05m to 0.3m / s; made of polyurethane rubber 0.01m to 1m. Y-ring sealing performance, service life and no duty cycle is the working pressure limit has been better than polyurethane rubber material.
Y-type sealing ring of the performance and characteristics:
1) reliable sealing performance;
2) Frictional resistance is small, smooth movement;
3) good pressure, the use of a wide range of pressure;
4) the organization is simple, low prices;
5) easy to install.
Y-type ring to rely on its open lip attached to the sealing sub-coupling surface, and linear contact, under the pressure of the medium to produce "peak" contact stress, the higher the pressure, the greater the stress. When the coupling member is relatively moved at the working speed, a sealing liquid film is formed between the sealing lip and the sliding coupling surface, thereby producing a sealing action. Seal lip wear, due to the role of medium pressure and have a certain degree of automatic compensation.
Install the Y-ring is the lip must be facing the side of the pressure in order to play a sealed role. In order to prevent the root of the Y-ring from being deformed by the material in the high-pressure state, the size of the mating gap between the slip couplings should be controlled. In order to protect the service life, The root is squeezed into the mating gap, the ring should be installed in the ring ring.
For wide Y-ring, the width of the cross-section is twice or more than the height. This ring will not be in the groove in the flip, twisted, can not install the support ring.
The main reference to the structural design of the Y-ring is that the working pressure and the different working pressure need to adjust the corresponding parameters in the design. The structural design parameters are as follows: the amount of the lip, the thickness of the lip, the outer lip The angle between the cylinder and the inner lip and the piston rod. Which lip design is very important, which is directly related to the Y-ring sealing performance.
Y-ring in the design according to the size of the cylinder diameter, so that you must contact with you there is a certain amount of interference, which can produce the initial sealing force. The amount of interference should not be too large design can not be too small, when the Y-ring inner lip greater amount of interference, will increase the lip and contact surface friction, resulting in excessive wear and tear lip. Although the Y-ring generally has a self-compensating function, but this time to reduce the overall life of the ring.
When the smaller amount of interference, the direct result is the lip and seal contact surface relaxation preload is not up to standard, poor sealing effect, the conditions for high pressure conditions will be more serious.
Y-ring in the pressure to withstand the smaller, the sealing force of the seal are generally only from the seal of the preload, but when the pressure to withstand the seal, this time in order to improve the sealing performance, can not just consider The amount of interference problems, but also need to consider the problem of the thickness of the lips, the thicker the stronger the ability to resist bending.
Y-ring of the lip can be removable molding or mechanical cutting way to shape, for the lip size is small or large size is usually used to form a molding method, there is another method, the use of cutting Processing methods Cutting lip, the need for specialized tire, and more than a process, the production cycle is longer.