Mechanical seal for rotating shaft
AssigneeA. W. Chesterton Company
InventorKeith R. Toal
Life of this patent
Estimating the term…
Abstract
An improved mechanical seal for a pump includes a seal cartridge slidably received inside an end plate. The cartridge includes an outer cylindrical stator member which is slidably received in the end plate and an inner cylindrical rotor which is rotatable within the stator member. The stator member is prevented from rotation in the end plate. The stator member includes a shoulder which extends outwardly over the end plate and is captured between the end plate and the housing of the pump. A clinching collar is fixed to the rotor member and retains the rotor member of the cartridge to the pump shaft. The clinching collar may pass through the end plate while attached to the rotor member and pump shaft. Lubricating passageways in the end plate allow lubricants to circulate past the seal cartridge bearing surfaces.
Claims20
A mechanical seal for a rotating shaft machine having a drive shaft extending therefrom, comprising
- a mounting flange having an opening therethrough,
- the mounting flange having an inboard face and an outboard face,
- a cartridge member slidably receivable in the opening of the mounting flange,
- the cartridge member comprising a stationary member and a rotational member,
- the stationary member nonrotatable within the opening of the mounting flange,
- the stationary member having an annular bearing face,
- the rotational member having an annular bearing face opposing the annular bearing face of the stationary member,
- the bearing face of the stationary member touchingly engaging the annular bearing face of the rotational member and rotatably slidable thereon,
- the rotational member axially rotatable relative to said stationary housing,
- the rotational member extending from said stationary housing,
- a drive clamp selectively fixable to the rotational member,
- the drive clamp receiving the drive shaft of the rotating shaft machine and selectively mountable thereto,
- the drive clamp spaced apart from the stationary member,
- the drive clamp having a diameter smaller than the diameter of the opening of the mounting flange,
- whereby the mounting flange may be removed from the rotating shaft machine and from the cartridge member and the drive clamp without detaching the drive clamp from the drive shaft.
A mechanical seal for a rotating shaft machine having a drive shaft extending therefrom, comprising
- a mounting flange having a cylindrical opening therethrough,
- the mounting flange having an inboard face and an outboard face,
- a cartridge member slidably receivable in the cylindrical opening of the mounting flange,
- the cartridge member comprising an outer stationary housing and an inner rotational member,
- the stationary housing having a cylindrical axial passageway therethrough,
- the rotational member slidably receivable within the cylindrical axial passageway of said stationary housing and axially rotatable therewithin,
- the rotational member extending from the outboard end of said stationary housing when the rotational member is fully received in the stationary housing,
- the rotational member having an inboard end and an outboard end and an annular extension fixed along the length thereof,
- the annular extension including a bearing face thereon,
- the stationary housing having a bearing face opposing the bearing face of the annular extension of the rotational member,
- the bearing face of the rotational member abutting the bearing face of the stationary housing when the rotational member is fully received in the stationary housing,
- said rotational member is selectively attachable to the drive shaft,
- the mounting flange removable from the cartridge without detaching the rotational member from the drive shaft.
A drive clamp for locking a mechanical seal to a drive shaft of a rotating machine comprising
- an integral cylindrical body having a cylindrical axial passageway therethrough,
- the cylindrical body having a single radially disposed gap extending therethrough from the passageway thereof to the exterior thereof,
- said gap having opposing first and second sides,
- a drawing member disposed to selectively urge the first side of said gap toward the second side of said gap,
- whereby the passageway of said cylindrical body may be effectively reduced in diameter.
Dependencies are inferred from the claim text.