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
  • F04D13/06—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
  • F04D29/00—Details, component parts, or accessories
  • F04D29/58—Cooling; Heating; Diminishing heat transfer
  • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
  • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D3/00—Axial-flow pumps
  • F04D3/02—Axial-flow pumps of screw type

Definitions

• the invention relates to a pump with the rotor of a drive motor arranged in a motor housing - and outside of the shaft bearing - of a pump shaft which passes through and which is ultimately provided with a pump impeller having blades.
• Such a pump is described in DE 15 28 640 B2 by the applicant;
• the motor housing is laterally connected to a pump housing and contains - on both sides of the drive motor - a shaft bearing with a sleeve surrounding a shaft journal and the bearing-encompassing O-ring.
• a disk is attached between the area of the pump shaft passing through the drive motor and the shaft bearing.
• One end of the pump shaft carries the pump impeller, which is rotatable in the pump housing, the circumference of which rotates in the area of the pressure side of the pump housing and which opens centrally towards the suction side.
• the bearing parts of the pump shaft and the pump housing that slide on each other consist of sintered single-material material (alpha-aluminum oxide) of high purity, which is particularly suitable for use in glandless heating circulation pumps.
• the inventor has set himself the goal of creating a novel pump concept in which the drive is integrated in the pump hub and built-in motor parts from series production can be used.
• the motor housing is surrounded at the radial distance by a pump housing, which surrounds the pump impeller with a so-called neck section, the latter being connected to the pump shaft by means of a hub delimiting the annular space to the longitudinal axis of the pump, and the blades of the pump impeller in protrude that annulus.
• a central connecting piece is to be integrally formed on the inside of the bottom of the bowl-like hub of the pump impeller for receiving one end of the pump shaft in order to form a common rotating unit with the latter.
• the pump housing tapers on both sides of a pipe section through a neck section each with a connection area that is inclined in the longitudinal section toward the longitudinal axis, the length of the connection area being able to correspond to approximately half the length of the neck section; the neck section ends with a region approximately parallel to the longitudinal axis, which is offset axially to that tube section.
• the inclined - preferably curved - connection area of the pump housing is opposite a correspondingly shaped end section of the motor housing and limits the annular space with it without significantly changing its longitudinal shape.
• the end section of the motor housing should also be attached to the hub of the pump impeller, ie the standing end section is adjacent to the rotating hub, the bowl wall of which is preferably flush with the end section.
• the annular space is divided into flow channels by axially parallel guide walls; these guide walls are radial ribs of a central tube of the motor housing and / or of the tube section of the pump housing.
• the pump shaft passes through roller bearings which are mounted in the axial connecting piece of the motor housing.
• These axial connections are each part of the end section of the motor housing and, according to another feature, each include a sealing insert and / or shaft seals and / or a shaft protection sleeve in addition to the rolling bearing.
• a sealing cover should be placed in front of the connecting piece and / or the sealing insert.
• the end section of the motor housing is firmly connected to the neck section of the pump housing by rod-like — preferably hollow and radial — struts; the latter are preferably formed in one piece with their end section and the neck section to form a unitary component.
• at least one of the struts contains a leakage channel which ends at the pump shaft.
• Such a leakage removal which can be monitored by means of a leakage sensor, is advantageously provided between the second and third radial shaft sealing rings.
• the end of the pump shaft which is remote from the pump impeller, is overlapped by a cover cap, which is attached to the end section of the motor housing adjacent to it; the free end of the pump shaft then preferably overlaps a final end cap.
• An additional two-stage version of the pump according to the invention has an elongated pump shaft, at each end of which a pump impeller is connected, ie the two-stage version contains a second pump impeller on its elongated shaft compared to the first pump impeller.
• a plane of symmetry for the pump in the axial center of the pump housing Both versions preferably have the same dimensions.
• the pump according to the invention is to be manufactured primarily with three different blade angles of 8 °, 12 ° and 16 ° and with two 4-pole motor variants (34 KW and 54 KW).
• the built-in motor consists of standard parts from standard motor production.
• FIG. 2 an enlarged detail from FIG. 1;
• FIG. 3 a longitudinal section corresponding approximately to FIG. 1 through a two-stage inline propeller pump according to line III-III in FIG. 4;
• FIG. 4 an end view of FIG. 3;
• Fig. 6 an oblique view of an impeller.
• a single-stage inline pump 10 with an exemplary length n of here 910 mm and an outer diameter d of 520 mm has a three-part pump housing 12 according to FIG - Neck sections 16 of length n 2 , each tapering concentrically to an axial length q through a cross-sectionally curved connecting section 16 a ; the wall area of its mouth ends runs approximately halfway along that length n 2 in a longitudinal section offset parallel to the longitudinal axis A of the pump housing 12.
• the housing sections 14 and 16 are otherwise joined together on radial flange ribs 15, 17.
• a pump shaft 20 is provided in the longitudinal axis A of the pump housing 12 and is mounted in the axial bearing or pipe socket 24 of a likewise three-part motor housing 30 by means of roller bearings 22.
• This axial bearing stub 24 is integrally formed on the inside of a collar-like end section 26 of the motor housing 30, which in turn is approximately parallel to that connecting section 16 a, and is connected to the adjacent neck section 16 by at least three radial struts 25, 25 a .
• the end section 26 is longitudinally inclined in accordance with that connecting section 16 a and detachably attached to the tubular central section 28 of the length z of the motor housing 30.
• the left-hand roller bearing 22 in FIG. 1 surrounds a shaft journal 21, which is delimited at one end by an annular step 21 a and which, according to FIG. 2, is followed by a sealing insert 32 and a sealing cover 34; the latter encompasses a shaft protection sleeve 36, to which a spacer ring 37 adjoins on the outside, followed by shaft sealing rings 38. Between these ends a leakage channel 39, which runs in a strut 25 a , which can be seen in FIG of the pump housing 12 is integrally formed. 40 is a key on the pump shaft 20 in FIG. 2.
• the left end portion 26 of the motor housing 30 in FIG. 1 is assigned a bowl-like part of a pump impeller 46 as its hub 42 of the outer diameter e with an outwardly directed bowl bottom 43, on the inside of which a connection piece 44 for the pump shaft 20 is formed; the impeller 46 having blades 45 is connected to the shaft journal 21 of the pump shaft 20 - among other things. connected by that key 40 - -.
• the other end of the pump shaft 20 is spanned by a final bearing cover 47, which a cover cap 48 with a spherical outer surface 49 overlaps at a distance.
• the outer diameter b of the motor housing 30 corresponding in its contour almost to that of the pump housing 12 is - thanks to the described curved connecting sections 16 a of the pump housing 12 - longer than the inner diameter at the end of the neck section 16.
• the motor housing 30 surrounds - with limitation of the flow to the pump impeller 46 annular space 50 of radial width a of approximately 49 mm - a drive or built-in motor 52 which comprises a rotor assembly 54 penetrated by the pump shaft 20 and a stator assembly 56 on the housing side.
• the electrical cables to the built-in motor 52 are led through an axial channel in one of the struts 25, not visible in the drawing.
• the drive is integrated into the pump hub 42, and parts of the built-in motor 52 from the usual series production can be used.
• a two-stage inline pump 11 which offers that length n of 910 mm and also the outer diameter d of 520 mm.
• Their longitudinal axis A crosses a radial plane of symmetry E, on both sides of which the mutually identical pump sections run. Since the pump shaft 20 a is of the same configuration on both sides, there are collar-shaped end sections 26 on both sides of that plane of symmetry E - starting from the cylindrical central tube or central section 28 of the motor housing 30 - in which the group of roller bearings 22, sealing inserts 32 highlighted in FIG. 2 are present and sealing covers 34 are provided, likewise a leakage channel 39 between the shaft sealing rings 38.
• An end bowl as a hub 42 with an impeller 46 is assigned to each of the end sections 26.
• the motor housing 30 surrounding the drive or built-in motor 52 is provided in the region of its central section 28 of length z with — here twelve — radially molded-on ribs 58 as guide walls or guide plates. These limit axially parallel flow channels 60 of the annular space 50. Radial ribs 62 also protrude from the central tube section 14 of the pump housing 12 on the outer surface - here: three.
• the drive is also integrated into the pump hub 42.
• Two impellers 46 are driven by the built-in motor 52.
• the flow through those baffles 58 is so calmed that a swirl-free flow against the respective downstream impeller 46 is ensured even if the liquid is moved into the second axial direction by reversing the polarity of the built-in motor 52 and reversing the conveying direction Direction is promoted.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Rotary Pumps (AREA)
• Reciprocating Pumps (AREA)
• Lubrication Of Internal Combustion Engines (AREA)
• Fertilizing (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7967008

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (3)

Citations (4)

• 2002
  • 2002-01-25 DE DE20201183U patent/DE20201183U1/de not_active Expired - Lifetime
• 2003
  • 2003-01-22 ES ES03731690T patent/ES2290467T3/es not_active Expired - Lifetime
  • 2003-01-22 AT AT03731690T patent/ATE366368T1/de not_active IP Right Cessation
  • 2003-01-22 DE DE10302177A patent/DE10302177A1/de not_active Withdrawn
  • 2003-01-22 EP EP03731690A patent/EP1468189B1/de not_active Expired - Lifetime
  • 2003-01-22 WO PCT/EP2003/000580 patent/WO2003062642A1/de active IP Right Grant
  • 2003-01-22 DK DK03731690T patent/DK1468189T3/da active
  • 2003-01-22 DE DE50307609T patent/DE50307609D1/de not_active Expired - Lifetime

Patent Citations (4)

Also Published As

Similar Documents

Legal Events