Squeeze seal
Under the action of liquid pressure, the seal is sealed tightly to the gap between the matching parts, such as the O-ring and the rectangular ring.
Lip seal
The lip of the seal is attached to the surface of the other part under the action of liquid pressure to form a sealing ring.
Compacting seal
Rely on external force or hydraulic pressure to compress the seal, so that it produces an interference amount to stick to the sealed surface to achieve sealing.
Gap seal
By strictly controlling the gap between the two cooperating parts to prevent oil leakage, sealing is achieved.
The sealing device can also be divided into fixed sealing, reciprocating sealing and rotary sealing according to different methods of use; According to different sealing materials can be divided into rubber, plastic, leather and metal seals. The main requirements of the sealing device have a good sealing effect under a fixed working pressure and temperature, and the leakage is small; The friction coefficient is small, the friction is uniform, and it will not cause crawling or sticking of moving parts; Good wear resistance, long life, to a certain extent can automatically compensate the wear of the sealed parts and geometric accuracy error; Does not damage the surface of the sealed part; Oil resistance, corrosion resistance, not easy to aging; Low cost, easy, easy to use, simple maintenance; Adopt standardized structure and size.
Process features uniform texture, high dimensional accuracy, easy, low cost and low cost, can obtain complex shape, good elasticity, can expand installation texture uniform, high dimensional accuracy, more complex, high hardness, poor elasticity, can not expand installation texture uneven, poor dimensional accuracy, trouble, high cost, can not expand installation texture uniform, high dimensional accuracy, simple, low cost, poor elasticity, Can not expand the installation size of high precision, complex, high cost, large leakage.