Seal adjustment device for an operating pump
Inactive Publication Date: 2016-11-24
WEIR SLURRY GRP INC
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The patent describes a seal adjustment system for a centrifugal pump that can compensate for angular misalignments and provide accurate and proper alignment of the seal elements. The system includes a movable arm and an adjustment mechanism that articulates with the arm to effect axial movement of a portion of the seal mechanism. The system can be retrofitted to existing pumps and provide improved seal adjustment. The technical effects of this patent are improved seal adjustment accuracy and alignment, as well as improved pump performance and efficiency.
Problems solved by technology
However, an excessive amount of leakage is undesirable and can result in dissipation of limited fluid resources and environmental pollution.
Adjustment of the seal elements while the pump is in operation provides certain concerns and difficulties.
Serious injury can occur if contact is made by humans with the rotating drive shaft and other rotating elements of the pump.
As a result, pump efficiencies are sacrificed leading to poor operation, excessive consumption or loss of lubricating fluid and early deterioration of the seal mechanism.
Of further concern is the fact that seal adjustment devices have, to date, proven to be insufficient for, or incapable of, making accurate adjustment of the seal elements.
While known seal adjustment devices can cause some movement of, or can adjust, the seal elements (e.g., static seals in a mechanical seal arrangement or packing seals), the movement is often not axially accurate and misalignment of the seal elements with other elements of the seal or pump can produce failure of the seal.
For example, misalignment of a static seal and a dynamic seal can cause the seal faces to join improperly and thus be subject to premature wear, or can result in incomplete sealing and undesirable leakage at the seal face.
Additionally, conventional seal assembly adjustment devices are limited in the amount of adjustment they can provide.
Conventional seal adjustment devices are limited, by virtue of their design, in the amount of axial adjustment that can be provided to the seal assembly.
Method used
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[0069]FIG. 1 provides an initial understanding of the general positioning and functioning of a seal adjustment system in accordance with this disclosure. In FIG. 1, the drive side of a centrifugal pump 10 is shown, and more specifically, the exterior of the pump casing 12 is shown. Centrifugal pumps are well known in the industry and are not discussed in detail herein for that reason; however, those elements of the pump that are necessary for the understanding of the embodiments and aspects of the disclosure are described.
[0070]In certain centrifugal pumps, and as shown in FIG. 1, the pump casing 12 comprises two halves that are joined about the periphery of the halves. One half of the pump casing is a suction side casing (not shown) and the other half is a drive side casing 14 as shown in FIG. 1. The two halves that form the pump casing 12 generally define a pump chamber (not shown) which accommodates an impeller therein for rotation. The suction side of the pump casing (not shown)...
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A seal adjustment system for a centrifugal pump includes a movable arm having two opposing ends, one end being positioned relative to a sealing mechanism of a pump and the other end being arranged for connection to a portion of the pump spaced from the sealing mechanism, and an adjustment mechanism having a first end positioned for attachment to a portion of a pump and a second end connected to the said other end of the movable arm in articulating engagement therewith, wherein activation of the adjustment mechanism provides movement of the movable arm to effect axial adjustment of a portion of the sealing mechanism of the pump.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a non-provisional application that claims priority to U.S. provisional application Ser. No. 62 / 163,771, filed May 19, 2015, the contents of which are incorporated herein in their entirety.TECHNICAL FIELD[0002]This disclosure relates, in general, to centrifugal pumps and, in particular, to improved apparatus for carrying out the adjustment of elements of a seal mechanism of a centrifugal pump while the pump is in operation.BACKGROUND OF THE DISCLOSURE[0003]Centrifugal pumps conventionally include an impeller that is positioned within a pump chamber for rotation. The pump chamber is generally formed within outer casing elements which, in combination, form a pump casing having a suction inlet and a pump discharge. A drive shaft extends into an opening in the pump casing to engage and be secured to the impeller for rotation of the impeller. The drive shaft is attached to a drive means, such as a motor, and is typically supported by a ...
Claims
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Login to View More IPC IPC(8): F04D29/10F04D17/08F04D29/056F04D29/043F04D29/053F04D29/046F04D1/00F04D29/42
CPCF04D29/106F04D1/00F04D17/08F04D29/102F04D29/056F04D29/426F04D29/043F04D29/053F04D29/046F04D29/4206F04D15/0077
InventorBOURGEOIS, RONALD J.
OwnerWEIR SLURRY GRP INC