Split-ring seal

A split seal device for use with a rotating body and a stationary body, comprising:

• a rotational portion and a stationary portion, said rotational portion comprising a rotary body provided with means for mounting on a rotating shaft, said stationary portion comprising a stationary wear ring;
• a fractured split ring co-axially mounted, at least in part, within said rotary body, said fractured split ring having a contact face for contacting the stationary portion in frictional engagement with a wear ring of the stationary portion, said wear ring and said fractured split ring each being fractured along two diametrically opposite uneven fracture lines;
• and
• a flexible elastomeric insert fixedly bonded to at least a part of an outer circumference of the fractured split ring and fittingly engaged between said rotary body and said fractured split ring, said insert carrying a plurality of equidistantly spaced flexible lugs integrally formed on an exterior thereof and engageable with corresponding grooves made in the rotary body for securedly connecting the fractured split ring to the rotary body and for transmitting torque to the fractured split ring, while dampening any shock loading transmitted to and from the fractured split ring.

A split seal device for use with a rotating body and a stationary body comprising:

• a rotating drive sleeve adapted for co-axial mounting on at least a part of a rotating shaft, said drive sleeve being formed with an annular groove adjacent one of its ends, at least one drive key for transmitting rotational force to the rotary body and an outwardly extending shoulder adjacent an opposite end of the drive sleeve;
• a rotational portion comprising a rotary body having an outer lateral part, which is provided with a plurality of equidistantly spaced grooves, and a transverse web, which is provided with at least one notch for frictional engagement with said at least one drive key of said drive sleeve, a fracture seal ring co-axially mounted, at least in part, within said lateral part of the rotary body and an elastomeric flexible insert fixedly bonded to at least a part of an outer circumference of the seal ring and fittingly engaged between said rotary body and said seal ring, said flexible insert being provided with a plurality of flexible lugs integrally formed on its outer circumference for frictional engagement within said grooves of said lateral part of the rotary body and transmittal of rotational force to said seal ring, said insert being further provided with a plurality of raised riblets for providing a positive compressive static seal between the flexible insert and the rotary body, said seal ring being formed with an upwardly raised shoulder defining a removal groove for facilitating removal of the seal ring from the rotary body, when required, said rotational portion further comprising an annular cone spring mounted between said drive sleeve and said rotary body and fitted within a cutout formed in the rotary body and abutting said outwardly extending shoulder of the drive sleeve, said cone spring applying a compressive force on the rotary body through substantially entire section of the cone spring;
• a stationary portion, comprising a stationary wear ring, a flange means for attaching the device to a fluid containing vessel, said flange means comprising a pair of flange halves fixedly secured together and provided with an elastomeric flange seal mounted between said flange halves for accommodating possible misalignment of the flange halves, when joined together, and prevent fluid leakage between the flange halves, said stationary portion further comprising a plurality of setting plates, each setting plate being fixedly attached to a respective flange half, at least a portion of the setting plate being engageable in the annular groove of said drive sleeve, so as to provide compressive force on an inside diameter of said cone spring, said rotary body and said seal ring.