Abstract: A reciprocating shaft's sealing apparatus combined a ferrofluid seal with a C-slip-ring and a Yx-seal-ring, characterized in that the first O-ring (3), the first Yx-seal-ring (4) and the first C-slip-ring (5) are installed into the grooves of the first fixed base (2), respectively, the second O-ring (15), the second Yx-seal-ring (14) and the first C-slip-ring (13) are installed into the grooves of the second fixed base (16), respectively, the first fixed base, the first pole piece (7) installed with an O-ring, a magnet (10), the second pole piece (11) installed with an O-ring and the second fixed base are placed in series at the bottom of the charmer of the sealing base (1), the above parts are pressed tightly by the end cover by means of the bolts connected with the sealing base, and the ferrofluid is injected into the magnet before assembling. The apparatus solves the problem of leakage in the reciprocating type of compressors.

Abstract: A combined sealing device composed of a magnetic fluid seal and a C-type slip ring seal for a reciprocating shaft, characterized in that an internal circlip (2) with an O-shaped rubber seal ring, N pieces of seal assemblies, a C-type slip ring (7) provided on the external circlip, and an external circlip (8) with an O-shaped rubber seal are placed at the end of the sealed chamber (1) with an O-shaped rubber seal in order, and by connecting the external thread of the swivel nut (9) with the thread of the sealed chamber (1) with the O-shaped rubber seal, the swivel nut (9) is adapted to press above listed parts tightly, 1?N?20; every seal assembly is composed of a C-type slip ring (3), a pole piece (4) with an O-shaped rubber seal, a permanent magnet (5), and a pole piece (6), then the above-mentioned components are bonded together; before the combined sealing device composed of the magnetic fluid seal and the C-type slip ring for the reciprocating shaft is installed on the shaft, the magnetic fluid is injected

Abstract: A magnetic fluid sealing and packing ring sealing device for reciprocating shaft with the packing ring having three oblique mouths, characterized in that the first packing ring (2) with three oblique mouths, the first pole piece (3) with “O” rubber seal ring, the first permanent magnet (4), the second pole piece (5) with “O” rubber seal ring, the second packing ring (6) with three oblique mouths, the third pole piece (7) with “O” rubber seal ring, the second permanent magnet (8), the fourth pole piece (9) with “O” rubber seal ring, the third packing ring (10) with three oblique mouths, the fifth pole piece (11) with “O” rubber seal ring, the third permanent magnet (12), the sixth pole piece (13) with “O” rubber seal ring, the fourth packing ring (14) with three oblique mouths are placed at the end of sealed chamber (1) with “O” rubber seal ring in order, the sealed chamber (1) with “O” rubber seal ring is connected by the bolt (16) to press the above parts tightly.