US3385224A - Controllable liquid conveying assembly - Google Patents

Controllable liquid conveying assembly Download PDF

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Publication number
US3385224A
US3385224A US536692A US53669266A US3385224A US 3385224 A US3385224 A US 3385224A US 536692 A US536692 A US 536692A US 53669266 A US53669266 A US 53669266A US 3385224 A US3385224 A US 3385224A
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United States
Prior art keywords
control element
pump
motor
housing
liquid
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US536692A
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English (en)
Inventor
Jaun Hermann
Moser Hans
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Micro Electric AG
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Individual
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Publication date
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Publication of US3385224A publication Critical patent/US3385224A/en
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    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
    • 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
    • F04D13/0666—Units comprising pumps and their driving means the pump being electrically driven the motor being of the plane gap type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0016—Control, e.g. regulation, of pumps, pumping installations or systems by using valves mixing-reversing- or deviation valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps

Definitions

  • a pump has a control element mounted within its pump housing. On this control element is mounted sealing means to seal the inlet and the outlet of the housing. The control element furthermore has passages for directing fluid within the housing to and from the pump impeller. The control element is adjustable between a position in which the inlet and outlet openings are sealed closed and a position in which these openings are in communication with the pump impeller.
  • the invention relates to a controllable liquid conveying assembly having an axially divisible housing whose component parts are designated in the following as pump housing and motor block housing, as well as a control element actuatable externally for controlling the conveying liquid radially flowing to and discharging from the pump housing.
  • liquid conveying assembly which permits the conveyance of liquids having a relatively high content of foreign bodies, in an unfiltered state, or which can be placed in operation again without difliculty even after long intervals of inoperativeness, such as, for example, a pump for hot water heaters with forced cycle.
  • control element is provided with sealing elements permitting the sealing of the pump housing in a liquid-tight manner, and wherein the pump impeller is combined structurally with the rotor of an axial electric motor, without the use of glands or stuffing boxes.
  • control element rotatably and coaxially to the pump motor axis and by giving this control element an outer surface movable as a seal in front of the liquid inlet and outlet openings.
  • FIGURE 1 is a partially cross-sectioned, longitudinal view of a controllable liquid conveying assembly according to the invention.
  • FIGURE 2 illustrates, on a larger scale, a partial view of the arrangement of FIGURE 1 showing in detail the construction of the conical bearing for the unit formed by the motor rotor and the pump impeller.
  • FIGURE 3 is a view of the pump housing and the control element shown in the direction of arrow A of FIGURE 1, after the motor block housing has been removed, together with the unit formed by the motor rotor and the pump impeller, the control element being illustrated in the closed position.
  • FIGURE 4 is a view of the control element in the direction of arrow B of FIGURE 3.
  • FIGURE 5 shows, on a larger scale, a partial cross section through a modified embodiment of the invention wherein the control element is axially displaceable and connectible with the pump impeller;
  • FIGURE 6 shows a section along line VIVI of FIG- URE 5.
  • the liquid conveying assembly of FIGURES 14 is provided with an axially divisible housing having a pump housing 1 and a motor block housing 2.
  • the stator of the axial motor mounted in the motor block housing is provided with an annular magnetic iron core 3, and excitation windings 4 supplied with current from the mains.
  • a screw bolt 7 is threadedly inserted into an axial bore 5 of a central boss 6 of the motor block housing 2.
  • a membrane 8 seals the motor block housing on the side facing the pump housing 1, in a fluid-tight manner; a seal 10 inserted in an annular body 9 sealingly engages the central, smooth section 11 of the screw bolt 7 and the membrane '8.
  • An axle 15 is threaded onto the end of the screw bolt 7 facing away from the boss 6 of the motor block housing.
  • the axle carries a shaft box 16 on the side facing the motor block housing on which the rotor of the axial motor, having an annular magnetic iron core 17 and a squirrel cage winding 18, is positioned.
  • the pump impeller 19 is fixedly connected with the rotor 17, 18 of the axial motor, for example by a threaded connection.
  • the impeller 19 is a centrifugal impeller and has open vanes 20.
  • the boss 21 of the impeller carries a bearing ring 22, seen in FIG. 2, which forms a conical bearing together with a cone-shaped bearing part 23 inserted into the end of the axle, facing away from the motor block housing.
  • the bearing ring 22 and the bearing part 23 are made of hard metal or other material resistant to wear and tear.
  • An annular flange 25 of the motor block housing encompasses the open end of the pump housing facing the motor block housing. Screws 26 which extend through radial flanged portions of the motor block housing and which are threaded into threaded bores 27 of lugs 28 of 3 the pump housing as seen in FIG. 3, hold the housing parts 1, 2 together in a detachable fashion. In this connection, a sealing ring 29 inserted between the front edge of the pump housing and the membrane establishes a fluidtight connection of the two housing portions 1, 2.
  • the pump housing has radial connecting studs 32, 33 which oppose each other diametrically.
  • the boss 35 of the control element 36 facing away from the motor block housing is rotatably mounted the boss 35 of the control element 36.
  • a handwheel 39 having the shape of a disk and being provided with grip-type teeth 38 is mounted by screws 37 at the end of the boss 35 extending beyond the front wall 34 to the outside.
  • a cup spring 40 pushed onto the boss abuts against the outer surface of the front wall 34 and the front edge of the boss 41 of the handwheel 39. The spring 40 attempts to press the control element 36 against the front wall 34 so that the shoulder 42 of the control element engages the sealing ring 43 and the inner surface of the front wall 34.
  • the control element 36 has a cylindrical outer surface 43 slidingly fitting into the bore of the pump housing.
  • the outer surface 48 of the control element is provided with a stepped liquid inlet opening 53 and the control element on the side of the impeller is provided with two tongue-shaped guide flanks 54, 55.
  • the guide flanks 54, 55 form an acute angle with the tangent on the circumference of the control element 36, this angle being preferably between and 75.
  • the mutual distance of the guide flanks 54, 55 corresponds, at the periphery of the control element 36, approximately to the width of the opening of the connecting pipes 32, 33 in the direction of their circumference.
  • the shaft box 16 In order to cool, during operation, the radial bearing formed by the axle 15 and the shaft box 16, and in order to lubricate same with conveying liquid, the shaft box 16 is provided with lubricating grooves which are not shown, and which run in the axial direction. These lubrieating grooves are hydraulically connected, via radial channels 61 of the motor rotor 17, 18, with the high pressure chamber 60. Upon rotation of the rotor, conveying liquid is constantly fed to the lubricating grooves.
  • the conical bearing 22, 23 is lubricated by an axial bore 62 of the impeller boss 21.
  • An annular protective shell 70 located on the membrane 8 prevents the flushing of larger particles of dirt into the channels 61, the motor air gap, and the bearing slots.
  • the control element 36 When the pump impeller 19 adheres tightly to the axle 15, for example, after a longer operating pause, and can not be detached by the starting torque of the axial motor, the control element 36 is placed in its closed position. If then the locking screw 45 is removed, a screw driver can be inserted through the aligned central bores of the hand-l wheel 39 and the hub 35 of the control element 36, and can be brought into engagement with the groove 63 on the free front side of the boss 21 of the pump impeller 19, in order to free the pump impeller by hand.
  • the pump housing 1 is again blocked against the liquid cycle with the aid of the control element 36. Then, the screws 26 are loosened, whereby the motor block housing 2, along with the unit formed by the motor rotor 17, 18 and the pump impeller 19, can be removed. The motor rotor and the pump impeller can be pulled off the axle 15 with one grip.
  • FIG- URES 5 and 6 differs from the previously described embodiment only in that measures are provided for deblocking the assembly.
  • the control element 36 is mounted, with its boss 35 in the front wall 34 of the pump housing 1, against the force of the cup springs 49, in an axially displaceable manner.
  • a tappetfollower 68 with a tappet nose 69 is fixedly inserted in the front face of the box 35 facing the pump impeller 19.
  • the opposite front face of the boss 21 of the pump impeller 19 is provided with a groove 67 suitable for receiving the tappet nose 69.
  • control element 36 is displaced axially toward the inside by means of pressure exerted upon the handwheel, and, if required, rotated at the same time until the tappet nose 69 engages the groove 67. By subsequently turning the handwheel 69 even further, the blocked pump impeller is loosened.
  • the motor rotor is provided advantageously with radial channels which are in communication with, on the one hand, the bearing slot space on the low-pressure side and, on the other hand, the outer rotor space on the highpressure side.
  • radial channels Through the radial channels, with the rotor rotating, a flow of liquid is constantly maintained which cools and lubricates the bearings of the unit formed by the motor rotor and the pump impeller.
  • the radial inlet and outlet openings of the pump housing are preferably positioned diametrically opposite to one another, so that the direction of flow of the conveying liquid through the pump can be reversed by turning the control element by
  • the pump housing can be provided, for the feeding and discharging of liquid, with several openings, for example, two inlets and one common outlet, which all cooperate with the control element. In this manner, the conventional mixing effects for several conveying liquid cycles can be obtained.
  • the unit formed by motor rotor and pump impeller is furthermore mounted on a fixed axle connected with the motor block housing and is rotatable; this fixed axle, in addition to being a radial mounting, forms a conical bearing serving as the axial bearing for the unit consisting of motor rotor and pump impeller.
  • a further radial bearing is not necessary.
  • the conical bearing keeps the frictional forces small which must be overcome by the motor.
  • the pump housing can be provided advantageously with an opening which is normally closed, through which opening the pump impeller can be manually rotated from the outside.
  • This construction makes it possible to free the pump in a simple manner, for ex ample, when the pump is blocked after rather long periods of inoperativeness because of calcium deposits from the conveying liquid or the like, so that the starting torque of the motor is insuflicient to initiate the operation of the pump.
  • the control element need only be placed in the closed position in order to separate the pump housing from the fluid cycle.
  • the opening of the pump housing which is normally sealed in a fluid-tight manner by a locking screw, for example, can be opened and a tool, for example, a screw driver, can be inserted through this opening with whose aid the unit formed by the pump impeller and the motor rotor is forcibly turned by hand.
  • a tool for example, a screw driver
  • control element not only rotatable, but additionally externally axially displaceable and connectible with the pump impeller. If the pump is blocked, the control element need only be coupled with the pump impeller, and then the impeller can be freed by turning the control element.
  • the coupling between the control element and the pump impeller can be flush or frictional coupling. A frictional coupling makes it possible to check the direction of rotation of the rotor when the motor is running.
  • the conveying efficiency of the pump can be improved, as has been discovered, with the other conditions remaining the same, by delimiting the liquid inlet opening in the outer surface of the control element in the eifective area of the egress of the impeller by means of guide flanks forming an acute angle with the tangent on the circumference of the control element, and whose outer peripheral spacing is approximately equal to the length of the periphery of the liquid inlet opening of the pump housing.
  • the liquid inlet opening in the outer surface of the control element is preferably provided with a cross-sectional aperture area which varies in the direction of the circumference.
  • the change in cross section can be continuous, or in one or several steps.
  • the stator of the axial motor provided in the motor block housing is, in a further embodiment of the invention, separated from the rotor by a fluid-tight membrane positioned in the dividing plane of the housing.
  • a fluid-tight membrane positioned in the dividing plane of the housing.
  • a controllable liquid conveying assembly for feeding and radially discharging liquid, devoid of stuffing boxes and glands, comprising: a common housing axially divisible into a pump housing (1) and a motor block housing; said pump housing having liquid inlet and outlet openings (32, 33); a control element adjustable externally of the housings for controlling the feeding and discharge of the liquid; the control element (36) provided with sealing elements (50, 51, 52) permitting a fluid-tight sealing of the inlet and outlet openings (32, 33) of the pump housing (1); a pump impeller; and an axial motor having a rotor operatively connected therein; said motor being mounted in said motor block housing and having a pump-motor shaft axis (15), said motor driving said pump impeller.
  • control element (36) situated coaxially to the pumpmotor axis, and provided with a cylindrical outer surface (48) movable to seal the liquid inlet and outlet openings.
  • Liquid conveying assembly according to claim 1, the liquid inlet and outlet openings of the pump housing facing one another diametrically, and means to reverse the direction of flow of the conveying liquid through the pump by turning the control element by 4.
  • Liquid conveying assembly according to claim 3 the pump housing provided with several openings for feeding and withdrawing the liquid, to cooperate with the control element.
  • Liquid conveying assembly according to claim 1, the motor rotor and the pump impeller forming a unit rotatably and removably mounted on a fixed axle con nected with the motor block housing.
  • Liquid conveying assembly according to claim 5 a conical bearing provided as the axial bearing for the unit formed by the motor rotor and the pump impeller.
  • Liquid conveying assembly according to claim 1, the pump housing provided with a normally closed opening, permitting turning of the pump impeller therethrough by hand from the outside.
  • Liquid conveying assembly according to claim 1 the control element axially displaceable from the outside within predetermined limits, and connectible with the pump impeller.
  • said outer surface (48) of the control element having a liquid inlet opening delimited in the eifective range of the egress of the impeller by guide flanks (54, 55) which form an acute angle with the tangent on the circumference of the control element, and which have an outer peripheral spacing approximately equal to the peripheral length of the liquid inlet opening of the pump housing.
  • liquid inlet opening in the outer surface of the control element having a cross-sectional area of its aperture, changeable in the direction of its circumference.
  • Liquid conveying assembly according to claim 1, the stator of the axial motor, provided in the motor block housing separated from the motor rotor by a fluid-tight membrane located in the dividing plane of the housing.
  • Liquid conveying assembly according to claim 11, a stator Winding chamber, the membrane on the side of the stator supported by an insulating layer filling the neighboring stator winding chamber.
  • Liquid conveying assembly according to claim 1 further comprising a low-pressure side bearing slot cham- References Cited UNITED STATES PATENTS 2,752,857 7/1956 White 103-87 2,846,951 8/1958 Metral et a1. 1()387 3,183,837 5/1965 Helliwell 103-97 X 3,194,165 7/1965 Sorlin 103-87 3,289,597 12/1966 Stehrenberger et al. 103-97 ROBERT M. WALKER, Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US536692A 1965-03-25 1966-03-23 Controllable liquid conveying assembly Expired - Lifetime US3385224A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0064655 1965-03-25

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US3385224A true US3385224A (en) 1968-05-28

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ID=7311186

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Application Number Title Priority Date Filing Date
US536692A Expired - Lifetime US3385224A (en) 1965-03-25 1966-03-23 Controllable liquid conveying assembly

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US (1) US3385224A (enrdf_load_stackoverflow)
AT (1) AT275331B (enrdf_load_stackoverflow)
BE (1) BE678340A (enrdf_load_stackoverflow)
CH (1) CH455525A (enrdf_load_stackoverflow)
DE (1) DE1528768A1 (enrdf_load_stackoverflow)
GB (1) GB1141205A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109630425A (zh) * 2018-11-05 2019-04-16 宁波沃力科技有限公司 高效高压大流量无堵转模块化多功能漩涡泵
US11085355B2 (en) * 2018-08-03 2021-08-10 Hyundai Motor Company Coolant pump, cooling system provided with the same for vehicle and control method for the same
US20230179055A1 (en) * 2021-12-08 2023-06-08 Hyundai Motor Company Electric water pump

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU195286B (en) * 1986-02-03 1988-04-28 Femtechnika Szivattyu Es Anyag In-line formation of pump case for self-priming rotary pumps
DE3727758A1 (de) * 1987-08-20 1989-03-02 Licentia Gmbh Heizungswasserumwaelzpumpe
DE19629843B4 (de) * 1996-07-24 2005-06-02 Laing, Oliver Notschmiervorrichtung für Kreiselpumpen
DE19909371A1 (de) * 1999-03-03 2000-09-07 Wilo Gmbh Kreiselpumpe mit Serviceschnittstelle
DE50006366D1 (de) * 1999-03-03 2004-06-17 Wilo Ag Serviceadapter für ein Heizungs-oder Kühlsystem
CN111677687A (zh) * 2020-07-28 2020-09-18 杭州木野机械科技有限公司 一种高效离心泵转子支撑端安装机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752857A (en) * 1950-06-08 1956-07-03 Howard T White Motor pump unit with axial gap motor
US2846951A (en) * 1955-09-13 1958-08-12 Emerjy Soc Circulator
US3183837A (en) * 1962-01-11 1965-05-18 Guy S Helliwell Pump
US3194165A (en) * 1962-02-28 1965-07-13 Sorlin Nils Electric motor pump
US3289597A (en) * 1963-01-16 1966-12-06 Rutschi Ag K Centrifugal pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752857A (en) * 1950-06-08 1956-07-03 Howard T White Motor pump unit with axial gap motor
US2846951A (en) * 1955-09-13 1958-08-12 Emerjy Soc Circulator
US3183837A (en) * 1962-01-11 1965-05-18 Guy S Helliwell Pump
US3194165A (en) * 1962-02-28 1965-07-13 Sorlin Nils Electric motor pump
US3289597A (en) * 1963-01-16 1966-12-06 Rutschi Ag K Centrifugal pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11085355B2 (en) * 2018-08-03 2021-08-10 Hyundai Motor Company Coolant pump, cooling system provided with the same for vehicle and control method for the same
CN109630425A (zh) * 2018-11-05 2019-04-16 宁波沃力科技有限公司 高效高压大流量无堵转模块化多功能漩涡泵
US20230179055A1 (en) * 2021-12-08 2023-06-08 Hyundai Motor Company Electric water pump
US12345266B2 (en) * 2021-12-08 2025-07-01 Hyundai Motor Company Electric water pump

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Publication number Publication date
DE1528768A1 (de) 1970-02-12
BE678340A (enrdf_load_stackoverflow) 1966-09-01
GB1141205A (en) 1969-01-29
AT275331B (de) 1969-10-27
CH455525A (de) 1968-07-15

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