Internal Gear Pump
Inactive Publication Date: 2015-05-21
VIKING PUMP
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The patent describes a pump with a bracket and a through hole that allows for easy access to the pump chamber. The bracket has an inboard end and an outboard end. The pump includes a shaft with an inboard end and an outboard end. The shaft passes through the bracket and the seal assembly. The pump also includes a dowel that is connected to the shaft and a head. The pump can be easily disassembled for maintenance by removing the head and rotor. The technical effects of this design include improved access to the pump chamber, simplified maintenance, and improved sealing.
Problems solved by technology
In either case, these pumps are expensive by virtue of their complexity and extensive and robust construction requirements.
This may be true because the fluid pathway of most gear pumps is not easily accessible for cleaning, even though the components of gear pumps may be fabricated from materials appropriate for sanitary use, such as stainless steel.
Further, external gear pumps are unsuitable for sanitary service because the bearings, which support the two gear shafts, are usually internal to the pump and in contact with the liquid being pumped.
Further, the bearings are not easy to access and clean, which is necessary for a sanitary application.
In the case of an internal gear pump, the European Hygienic Engineering and Design Group (EHEDG) guidelines do not permit the idler pin of an internal gear pump to be press-fit onto its head because EHEDG guidelines do not allow for a press-fit between any two metal components disposed in a sanitary pump chamber or that come into contact with the fluid being pumped.
All of these alternatives would significantly add to the cost of an internal gear pump so it could be used in sanitary applications.
Another problem associated with the use of gear pumps for sanitary applications is the need for heating or cooling of the fluid being pumped.
As a result, traditional heating / cooling methods are rendered inefficient because of air gaps between the heating / cooling system and the head.
Method used
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[0033]In FIG. 1, a pump 10 is disclosed that includes a bracket 11 that may be coupled to a case 12. As also shown in FIG. 2, the bracket 11 includes an inboard end 13 and an outboard end 14. Further, the case 12 also may include an inboard end 15 and an open outboard end 16 that may be coupled to a head 17. The head 17 may be sandwiched between the open outboard end 16 of the case 12 in a cover 18. The case 12 may further include inlet and outlet ports 21, 22. Referring to FIGS. 1-3 together, a tube 23 may encircle a central axis of the pump 10 between the case 12 and the bracket 11. As discussed in greater detail below and shown schematically in FIG. 3, the tube 23 may be in communication with a fluid reservoir 24 which, in turn, may be in communication with a pump 25 that is also in communication with the tube 23. The tube 23 may carry heat transfer fluid around the pump for purposes of maintaining a proper temperature for pumping. The cover 18 may be coupled to the case 12 and h...
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An internal gear pump with a field replaceable idler is disclosed that may be used for sanitary applications. Access to the idler mainly requires removal of the head. Access to the seal assembly disposed at the inboard end of the pump chamber is also fast and easy as removal of the head exposes a fastener that secures the rotor to the drive shaft. Removal of this fastener enables the rotor to be removed with a standard rotor pulling tool thereby exposing the pump chamber seal assembly which may be cleaned, serviced or replaced as needed.
Description
BACKGROUND[0001]1. Technical Field[0002]This disclosure relates generally to internal gear pumps. More specifically, this disclosure relates to internal gear pumps including: a field replaceable idler; a heating / cooling tube for maintaining proper pumping temperature; a seal assembly for the pump chamber that may be replaced, cleaned or serviced without removing the drive shaft; and an improved idler assembly that includes a polymeric idler, a ceramic bushing, and a dowel that are press-fit together.[0003]2. Description of the Related Art[0004]A positive displacement pump causes fluid to move by trapping fluid and then forcing or displacing the trapped fluid through an outlet. Positive displacement rotary pumps are pumps that move fluid using the principles of rotation. At the inlet to the pump, the rotation captures and draws the fluid into the pump chamber before trapping the fluid and passing it through the outlet. Various types of rotary pumps are available, including, but not l...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F04C15/00F04C2/08F04D29/12
CPCF04C15/0038F04D29/126F04C2230/60F04C2/08F04C15/0096F04C2/10F04C13/005F04C2230/70F04C2240/30
InventorRAMSEY, MIKEHALL, JOHN HOWARDMEESSMANN, JEFFREY SCOTTTHOMPSON, JOSEPH P.DUTCHER, III, JOHN A.BOHLEN, KELLY J.
OwnerVIKING PUMP