Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D13/00—Pumping installations or systems
  • F04D13/02—Units comprising pumps and their driving means
  • F04D13/021—Units comprising pumps and their driving means containing a coupling
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D13/00—Pumping installations or systems
  • F04D13/02—Units comprising pumps and their driving means
  • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D13/00—Pumping installations or systems
  • F04D13/02—Units comprising pumps and their driving means
  • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use

Definitions

• Such pumps include, for example, tank pumps, which are used to pump media from a tank.
• the pump shaft is connected to a drive motor at the upper end and carries an impeller at the lower end, which helps pump the medium out of the tank.
• a drive motor at the upper end and carries an impeller at the lower end, which helps pump the medium out of the tank.
• the bearing housing and the pump housing are sealed against each other so that no medium can escape between the bearing housing and the pump housing.
• the detachable lock between the upper and lower shafts is designed as a bayonet lock. This allows for easy detachment of the lower shaft from the upper shaft, while simultaneously ensuring a secure, non-rotatable connection between the two shafts.
• the pump described below is connected to a drive 1 ( Fig. 1 ), which can be an electric motor or a compressed air-powered motor.
• the pump is compact and can be used both mobile and stationary, for example, to pump low- to medium-viscosity liquids.
• the pump is used for bottom-loading of containers, tanks, IBCs (intermediate bulk containers), and the like.
• the pump is primarily designed for use in hygienic applications and is particularly CIP (Clean-In-Place) and SIP (Steam-In-Place) compatible. Furthermore, the pump can be easily disassembled without tools, making it particularly easy and reliable to clean.
• the pump has a bearing housing 2 which is detachably connected to a pump housing 3.
• the coupling part 4 is provided with Fig. 3 upper end of a pump shaft 5, which consists of an upper shaft 6 and a lower shaft 7.
• the two shafts 6, 7 are connected to each other in a rotationally fixed manner.
• the upper shaft 6 is designed as a hollow shaft that extends into the coupling part 4 and has positive locking elements 8 at the upper free end. They interact with counter-positive locking elements (not shown) provided on a motor shaft of the drive 1.
• the positive locking and counter-positive locking elements form a rotationally fixed connection between the motor shaft and the pump shaft 5.
• the upper shaft 6 is rotatably mounted in the bearing housing 2 with at least one bearing, preferably with two bearings 9, 10 arranged at a distance from one another.
• the two bearings 9, 10 arranged at an axial distance from one another are roller bearings, in particular Ball bearings.
• Bearings 9 and 10 can also be designed as plain bearings, depending on the pump's design.
• the bearings 9, 10 are secured axially to the bearing housing 2 by retaining rings 11, 12. As shown, the retaining rings 11, 12 are located on the opposite sides of the bearings 9, 10, which are each axially supported with their other sides on a radial annular shoulder 13, 14 on the inner wall 15 of the bearing housing 2.
• the bearing housing 2 surrounds the upper shaft 6 at a distance.
• the end of the upper shaft 6 projecting upwards beyond the upper bearing 9 is provided with the form-locking elements 8, which are advantageously provided such that they do not project axially beyond the coupling part 4.
• the coupling part 4 surrounds the upper end of the bearing housing 2, which is connected to the coupling part 4 in a suitable manner.
• the bearing housing 2 has an axially projecting ring 16 at its upper end, which surrounds the positive-locking elements 8 of the upper shaft 6 at a distance.
• the ring 16 is advantageously designed such that it does not project axially upwards beyond the coupling part 4.
• the upper shaft 6 has a central receptacle 17 into which the lower shaft 7 partially projects.
• the receptacle 17 extends from the lower end of the upper shaft 6 to a base 18 that defines the receptacle 17.
• the base 18 is located at a distance below the upper bearing 9 and serves to support at least one compression spring 19, which is advantageously a helical compression spring.
• the upper end of the lower shaft 7 rests against the compression spring 19 such that the compression spring 19 is axially compressed and exerts a corresponding axial force on the lower shaft 7.
• the lower shaft 7 rests against the inner wall 20 of the upper shaft 6.
• the upper shaft 6 and the lower shaft 7 are connected to each other in a rotationally fixed manner by a quick-release fastener 21.
• the quick-release fastener 21 is formed by a bayonet lock.
• the lower shaft 7 is provided with a radial pin 22 that protrudes radially beyond the lower shaft 7 and engages a corresponding bayonet opening 23 at the lower end of the upper shaft 6.
• the lower shaft 7 projects downwards over the upper shaft 6 and carries an impeller 24 at its lower free end, which, during pump operation, sucks the liquid out of the container and conveys it radially outward through an outlet 25. It projects radially from the pump housing 3, with which it is advantageously formed in one piece.
• the impeller 24 which can be an axial or radial impeller, is arranged near a suction port 26, which is provided at the lower end of the pump housing 3 and widens conically.
• the impeller 24 is located in the area between the suction port 26 and the outlet 25.
• the impeller 24 is advantageously detachably connected to the lower shaft 7 so that it can be replaced if necessary.
• the impeller 24 is advantageously screwed onto the lower end of the lower shaft 7.
• the outlet 25 is provided at the free end with a pressure nozzle 27, advantageously formed in one piece with it.
• a seal carrier 28 is arranged, with which at least one seal 29 is held, which sealingly rests against the lower shaft 7 in the area outside the upper shaft 6.
• the seal 29 is a radial shaft seal in the exemplary embodiment, but can also be formed by a mechanical seal or other dynamic seal. Seal 29 forms a dynamic seal, which ensures that when the pump shaft 5 rotates, the medium to be pumped does not reach the area of the lower bearing 10.
• the seal carrier 28 has a cylindrical retaining part 30 that rests against the inner wall 15 of the bearing housing 2 near the lower end.
• a fastening part 31 of the seal 29 is attached, for example, glued, to the inside of the cylindrical retaining part 30.
• a disc-shaped sealing lip 32 protrudes radially inward from the fastening part 31 and, under elastic deformation, forms a sealing contact against the lower shaft 7 at the transition from the bearing housing 2 to the pump housing 3.
• the retaining part 30 of the seal carrier 28 merges at the lower end facing the impeller 24 into a radially outwardly directed annular flange 33, which bears against the inside of a radially outwardly widening conical end section 34.
• the conical end section 34 cooperates with a conical end section 35 of the pump housing 3 when the bearing housing 2 and the pump housing 3 are detachably connected to one another via a connecting ring 36 in a manner to be described below.
• a static seal 37 in the form of an O-ring is located between the annular flange 33 of the seal carrier 28 and the end section 35 of the pump housing 3. In the installed position, the O-ring is clamped and elastically deformed between the end section 35 of the pump housing 3 and the annular flange 33 of the seal carrier 28. In this way, the interface between the bearing housing 2 and the pump housing 3 is perfectly sealed by the static seal 37.
• a joint clamp 38, 39 is releasably attached to the pressure port 27 and the suction port 26. They are designed in the same way as the connecting ring. 36, which is also designed as an articulated clamp. Therefore, only the articulated clamp 36 will be explained in more detail below.
• the articulated clamp has two partially circular curved joint parts 40, 41, which are connected via a joint connection 42 ( Fig. 3 ) are connected to each other by hinges. In the Fig. 3 and 4 the articulated connection 42 is only visible for the articulated clamps 38 and 39.
• the two legs 47', 47" of the end section 47 are connected to each other by a bolt 49, which runs parallel to the pivot axes 43, 44 of the articulated connection 42 and on which a pivot lever 50 is pivotally mounted at one end.
• the pivot lever 50 has a thread over part of its length, on which a wing nut 51 is seated.
• the partially circular joint parts 40, 41 are provided on the inside with conical surfaces 52, 53, which run at opposite angles to one another and interact with corresponding conical surfaces 54, 55 on the outside of the end sections 34, 35 of the bearing housing 2 and the pump housing 3.
• the bearing housing 2 and the pump housing 3 are pulled axially toward one another via the conical surfaces 52 to 55, whereby the static seal 37 is elastically compressed.
• the connecting ring 36 is designed such that it almost completely surrounds the interface between the bearing housing 2 and the pump housing 3, so that the end sections 34, 35 of the bearing housing and the pump housing 3 are firmly pressed axially against one another in the clamped position.
• the compression spring 19 applies axial load to the lower shaft 7 such that the radial pin 22 of the lower shaft 7 is securely held in the bayonet opening 23. This ensures that the upper shaft 6 and the lower shaft 7 are securely connected to each other. Thus, the impeller 24 can be reliably driven by the drive 1 via the pump shaft 5.
• the lower shaft 7 extends into the upper shaft 6 over part of its length, a separate bearing for the lower shaft 7 is not required. Instead, it is reliably supported for rotation by the bearings 9, 10 of the upper shaft 6.
• the bayonet lock between the upper shaft 6 and the lower shaft 7 is released.
• the upper shaft 6 is secured against rotation, while the lower shaft 7 is rotated relative to the rotationally locked upper shaft 6 so that the radial pin 22 is released from the bayonet opening 23.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

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Citations (5)

Family Cites Families (4)

• 2024
  • 2024-03-28 DE DE102024001083.1A patent/DE102024001083A1/de active Pending
• 2025
  • 2025-03-13 EP EP25163665.0A patent/EP4624751A1/fr active Pending

Patent Citations (5)

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