WO2024028907A1 - Electric pump or motor pump equipped with fixing device, and related fixing procedure - Google Patents

Electric pump or motor pump equipped with fixing device, and related fixing procedure Download PDF

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Publication number
WO2024028907A1
WO2024028907A1 PCT/IT2023/050177 IT2023050177W WO2024028907A1 WO 2024028907 A1 WO2024028907 A1 WO 2024028907A1 IT 2023050177 W IT2023050177 W IT 2023050177W WO 2024028907 A1 WO2024028907 A1 WO 2024028907A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
shaft
motor
keying
ball bearing
Prior art date
Application number
PCT/IT2023/050177
Other languages
French (fr)
Inventor
Alberto AFFETTI
Original Assignee
Affetti Pumps S.R.L.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Affetti Pumps S.R.L. filed Critical Affetti Pumps S.R.L.
Publication of WO2024028907A1 publication Critical patent/WO2024028907A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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

Definitions

  • the present invention refers to an electric pump or motor pump equipped with a suitable fixing device , in particular to a device for fixing the pump shaft of a rotary electric pump with the motor shaft of an electric motor, or to a device for fixing the pump shaft of a rotary motor pump with the motor shaft of an internal combustion engine or the like .
  • the present invention relates to a method for fixing the aforesaid electric pump or motor pump .
  • - IT-A-201800010750 which describes a motor unit designed to drive the rotating part of the electric pump, as well as a mechanical coupling between the motor shaft and the rotating part of the electric pump ;
  • Obj ect of the present invention is solving the aforementioned prior art problems , providing an electric pump or motor pump equipped with a suitable fastening device , and the relative fastening procedure , which allow in an optimal way the mechanical coupling between the motor shaft of an electric or internal combustion engine with the pump shaft of an electric pump or motor pump without making use of elastic or rigid couplings .
  • a further obj ect of the present invention is fixing the motor-shaft with the pump-shaft through a keying hole having standard measurements .
  • FIG . 1 shows a partially sectioned isometric view of an embodiment of a hori zontal electric pump equipped with the fastening device according to the present invention
  • FIG . 2 shows an enlarged, partially sectioned isometric view of the fastening device of FIG . 1 ;
  • FIG . 3 shows an isometric view, partially sectioned and enlarged, of a portion of the fastening device of FIG . 2 ;
  • FIG . 4 shows a partially sectioned isometric view of an embodiment of a vertical electric pump equipped with the fastening device according to the present invention
  • FIG . 5 shows an enlarged, partially sectioned isometric view of the fastening device of FIG. 4;
  • FIG. 6 shows an isometric view, partially sectioned and enlarged, of a portion of the fastening device of FIG. 5.
  • the electric pump or motor pump (100, 200) of the present invention is composed of a pump body (1) and a fixing device (10) , designed to make a connection of a pump shaft (3) contained in the pump body (1) with a motor shaft (4) of an electric motor (2) or an internal combustion engine, this connection taking place without elastic or rigid joints.
  • the electric pump or motor pump (100, 200) of the invention provides that the fastening device (10) comprises: at least one seat for a keying key (11) located on the motor shaft (4) ;
  • the keying hole (12) being designed to contain and be operatively coupled with the motorshaft
  • the keying recess (13) arranged in the internal portion of the keying hole (12) , being designed to accommodate and be operatively coupled with the keying key (11) of the motor shaft (4) and transmit the rotary motion induced by the motor shaft (4) to the pump shaft (3) ;
  • the ball bearing (1) being intimately connected with the internal portion of the pump shaft (3) , the external portion of the ball bearing (14) being connected with an anchoring portion of the lantern (21) of the pump body (1) , the upper side and the lower side of the ball bearing (14) being connected with at least one first stop ring (15) of the fastening device (10) ;
  • the stop ring (15) arranged in a superior position with respect to the ball bearing (14) along the pump shaft (3) , designed to prevent the axial sliding of the ball bearing (14) along the axis of the pump shaft (3) .
  • the electric pump or motor pump (100, 200) of the invention can also comprise a sealing ring (17) , the internal portion of the sealing ring (17) being operatively connected to the pump shaft (3) and the lateral portion of the sealing ring (17) being connected to a sealing portion (22) of the lantern (21) .
  • FIG. 4 shows, by way of non-limiting example, a second embodiment of the electric pump, namely a vertical electric pump (200) , to which the fastening device (10) of the present invention can be applied without problems.
  • This vertical electric pump (200) is equipped, with respect to the horizontal electric pump (100) and due to the slightly different configuration, with a second stop ring (16) and a third stop ring (23) (as shown in Figure 6) .
  • the invention also relates to a method for fixing the electric pump or motor pump (100, 200) described above, a method which is designed to fix the pump shaft (3) of the pump body (1) with the motor shaft (4) of an electric motor (2) or an internal combustion engine by means of the fixing device (10) .
  • This procedure includes the steps of:

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

Abstract

An electric pump or motor pump (100, 200) is described, consisting of a pump body (1) and a fixing device (10), designed to make a connection of a pump shaft (3) contained in the pump body (1) with a motor shaft (4) of an electric motor (2) or an internal combustion engine, this connection taking place without elastic or rigid couplings. Also described is a method for connecting an electric pump or motor pump (100, 200) with an electric motor (2) or an internal combustion engine.

Description

ELECTRIC PUMP OR MOTOR PUMP EQUIPPED WITH FIXING
DEVICE , AND RELATED FIXING PROCEDURE
The present invention refers to an electric pump or motor pump equipped with a suitable fixing device , in particular to a device for fixing the pump shaft of a rotary electric pump with the motor shaft of an electric motor, or to a device for fixing the pump shaft of a rotary motor pump with the motor shaft of an internal combustion engine or the like .
Furthermore , the present invention relates to a method for fixing the aforesaid electric pump or motor pump .
It is known that , in order to trans fer a liquid from one point to another, special hydraulic machines are used, such as in particular electric pumps or motor pumps . These electric pumps or motor pumps are provided inside with a cavity in which a rotating element is housed which is in contact with a liquid . The rotating element designed to move and energi ze the liquid is set in rotation, for example by an electric motor or internal combustion engine associated with it .
A plurality of connecting and/or fastening elements and/or devices are known, as described in the following patent documents :
- FR-A-2485646 , which describes the coupling between an electric motor and a centri fugal pump consisting of a housing bolted between the motor frame and the pump casing and a shaft supported by bearings which mate with the motor shaft and the pump rotor ;
- IT-A-201800010750 , which describes a motor unit designed to drive the rotating part of the electric pump, as well as a mechanical coupling between the motor shaft and the rotating part of the electric pump ;
- FR-A-2644520 , which describes a device for coupling a motor to a pump .
These elements and/or fastening devices for the transmission of motion from an electric motor to an electric pump or motor pump, are mostly equipped with connections with flanges and elastic or rigid j oints , and connection with pulleys between the motor-shaft and the pump-shaft , thus resulting long and expensive to activate in order to make the relative connections .
Obj ect of the present invention is solving the aforementioned prior art problems , providing an electric pump or motor pump equipped with a suitable fastening device , and the relative fastening procedure , which allow in an optimal way the mechanical coupling between the motor shaft of an electric or internal combustion engine with the pump shaft of an electric pump or motor pump without making use of elastic or rigid couplings .
A further obj ect of the present invention is fixing the motor-shaft with the pump-shaft through a keying hole having standard measurements .
The aforementioned and other obj ects and advantages of the invention, as will appear from the following description, are achieved with an electric pump or motor pump equipped with a suitable fastening device and a related fastening method as claimed in the respective independent claims .
Preferred embodiments and non-trivial variations of the present invention form the subj ect matter of the dependent claims .
It is understood that all attached claims form an integral part of the present description . It will be immediately obvious that innumerable variations and modi fications may be made to what is described, for example relating to shape , dimensions , arrangements and parts with equivalent functions without departing from the scope of the invention as appears from the attached claims .
The present invention will be better described by some preferred embodiments thereof , provided by way of non-limiting example , with reference to the attached drawings , in which :
FIG . 1 shows a partially sectioned isometric view of an embodiment of a hori zontal electric pump equipped with the fastening device according to the present invention;
FIG . 2 shows an enlarged, partially sectioned isometric view of the fastening device of FIG . 1 ;
FIG . 3 shows an isometric view, partially sectioned and enlarged, of a portion of the fastening device of FIG . 2 ;
FIG . 4 shows a partially sectioned isometric view of an embodiment of a vertical electric pump equipped with the fastening device according to the present invention;
FIG . 5 shows an enlarged, partially sectioned isometric view of the fastening device of FIG. 4; and
FIG. 6 shows an isometric view, partially sectioned and enlarged, of a portion of the fastening device of FIG. 5.
With reference to the Figures, the electric pump or motor pump (100, 200) of the present invention is composed of a pump body (1) and a fixing device (10) , designed to make a connection of a pump shaft (3) contained in the pump body (1) with a motor shaft (4) of an electric motor (2) or an internal combustion engine, this connection taking place without elastic or rigid joints.
To achieve this aim, in a preferred but nonlimiting embodiment, the electric pump or motor pump (100, 200) of the invention provides that the fastening device (10) comprises: at least one seat for a keying key (11) located on the motor shaft (4) ;
- at least one keying hole (12) and at least one keying recess (13) obtained inside the pumpshaft (3) , the keying hole (12) being designed to contain and be operatively coupled with the motorshaft, the keying recess (13) , arranged in the internal portion of the keying hole (12) , being designed to accommodate and be operatively coupled with the keying key (11) of the motor shaft (4) and transmit the rotary motion induced by the motor shaft (4) to the pump shaft (3) ;
- at least one ball bearing (14) , designed to support the radio-axial thrusts generated by an impeller placed inside said pump body (1) , the ball bearing (1) being intimately connected with the internal portion of the pump shaft (3) , the external portion of the ball bearing (14) being connected with an anchoring portion of the lantern (21) of the pump body (1) , the upper side and the lower side of the ball bearing (14) being connected with at least one first stop ring (15) of the fastening device (10) ;
- the stop ring (15) , arranged in a superior position with respect to the ball bearing (14) along the pump shaft (3) , designed to prevent the axial sliding of the ball bearing (14) along the axis of the pump shaft (3) .
In particular, the electric pump or motor pump (100, 200) of the invention can also comprise a sealing ring (17) , the internal portion of the sealing ring (17) being operatively connected to the pump shaft (3) and the lateral portion of the sealing ring (17) being connected to a sealing portion (22) of the lantern (21) .
FIG. 4 shows, by way of non-limiting example, a second embodiment of the electric pump, namely a vertical electric pump (200) , to which the fastening device (10) of the present invention can be applied without problems. This vertical electric pump (200) is equipped, with respect to the horizontal electric pump (100) and due to the slightly different configuration, with a second stop ring (16) and a third stop ring (23) (as shown in Figure 6) .
The invention also relates to a method for fixing the electric pump or motor pump (100, 200) described above, a method which is designed to fix the pump shaft (3) of the pump body (1) with the motor shaft (4) of an electric motor (2) or an internal combustion engine by means of the fixing device (10) . This procedure includes the steps of:
- providing the pump body (1) ;
- providing the electric motor (2) ;
- inserting the sealing ring (17) and the ball bearing (14) on the pump shaft (3) ;
- blocking the ball bearing (14) on the pump shaft (3) with the first stop ring (15) , and possibly with the second stop ring (16) and with the third stop ring (23) ;
- housing the ball bearing (14) in the lantern anchoring portion (21) of the pump body (1) ; housing the sealing ring (17) , in the sealing portion (22) of the pump body (1) ;
- approaching the electric motor (2) to said pump body ( 1 ) ;
- inserting the keying key (11) of the motor shaft (4) in the keying hole (12) of the pump shaft (3) equipped with the keying recess (13) ; and tightening the electric motor (2) to the pump body ( 1 ) .
A preferred embodiment of the invention has been described, but naturally it is susceptible to further modifications and variations within the same inventive idea. In particular, numerous variants and modifications, functionally equivalent to the previous ones, which fall within the scope of protection of the invention as highlighted in the attached claims, will be immediately evident to those skilled in the art.

Claims

1. Electric pump or horizontal motor pump (100) composed of a pump body (1) and a fixing device (10) , designed to connect a pump shaft (3) contained in said pump body (1) with a motor shaft (4) of an electric motor (2) or an internal combustion engine, characterized in that said fastening device (10) comprises:
- at least one seat for a keying tab (11) located on said motor shaft (4) ;
- at least one keying hole (12) and at least one keying recess (13) formed inside said pump shaft (3) , said keying hole (12) being designed to contain and operatively couple with said motor shaft (4) , said keying recess (13) , arranged in the internal portion of said keying hole (12) , being designed to accommodate and be operatively coupled with said keying tongue (11) of said drive shaft (4) and transmitting the rotary motion induced by said drive shaft (4) to said pump shaft (3) ;
- at least one ball bearing (14) , designed to support the radio-axial thrusts generated by an impeller placed inside said pump body (1) , said ball bearing (14) being intimately connected with the internal portion of said pump shaft (3) , the external portion of said ball bearing (14) being connected with an anchoring portion of the lantern (21) of said pump body (1) , the upper and lower side of said ball bearing (14) being connected with at least one first snap ring (15) of said fastening device (10) ; said first stop ring (15) arranged in a lower position with respect to said ball bearing (14) along said pump-shaft (3) , designed to prevent the axial sliding of said ball-bearing (14) along an axis of the pump-shaft (3) ; and
- a sealing ring (17) , the internal portion of said sealing ring (17) being operatively connected to said pump shaft (3) and the lateral portion of said sealing ring (17) being connected to a sealing portion (22) of said pump body (1) .
2. Electric pump or vertical motor pump (200) composed of a pump body (1) and a fixing device (10) , designed to connect a pump shaft (3) contained in said pump body (1) with a motor shaft (4) of an electric motor (2) or an internal combustion engine, characterized in that said fastening device (10) comprises: - at least one seat for a keying tab (11) located on said motor shaft (4) ;
- at least one keying hole (12) and at least one keying recess (13) formed inside said pump shaft (3) , said keying hole (12) being designed to contain and be operatively coupled with said motor shaft (4) , said keying recess (13) , arranged in the internal portion of said keying hole (12) , being designed to accommodate and be operatively coupled with said keying tongue (11) of said drive shaft (4) and transmitting the rotary motion induced by said drive shaft (4) to said pump shaft (3) ;
- at least one ball bearing (14) , designed to support the radio-axial thrusts generated by an impeller placed inside said pump body (1) , said ball bearing (14) being intimately connected with the inner portion of said pump shaft (3) , the outer portion of said ball bearing (14) being connected with a lantern anchoring portion (21) of said pump body (1) , the upper and lower side of said ball bearing (14) being connected with at least one first snap ring (15) , a second stop ring (16) and a third stop ring (23) of said fastening device (10) ;
- said first stop ring (15) , second stop ring (16) and third stop ring (23) , arranged respectively in a lower, higher and higher position with respect to said ball bearing (14) along said pump-shaft (3) , designed to prevent the axial sliding of said ball bearing (14) along an axis of the pump-shaft (3) ; and
- a sealing ring (17) , the internal portion of said sealing ring (17) being operatively connected to said pump shaft (3) and the lateral portion of said sealing ring (17) being connected to a sealing portion (22) of said pump body (1) .
3. Method for fixing the electric pump or motor pump (100, 200) according to any one of the preceding claims, designed to fix said pump-shaft (3) of said pump body (1) with said motor-shaft (4) of said electric motor (2) or said internal combustion engine by means of said fixing device (10) , said method being characterized in that it comprises the steps of:
- providing said pump body (1) ;
- providing said electric motor (2) ;
- inserting said sealing ring (17) and said ball bearing (14) on said pump shaft (3) ;
- locking said ball bearing (14) on the pump shaft (3) with said first stop ring (15) , and possibly with said second stop ring (16 and said third stop ring (23) ; housing said ball bearing (14) in the lantern anchoring portion (21) of said pump body (1) ; - housing said sealing ring (17) in the sealing portion (22) of said pump body (1) ;
- approaching said electric motor (2) to said pump body ( 1 ) ;
- inserting said keying tab (11) of said motor shaft (4) into said keying hole (12) of said pump shaft (3) provided with said keying recess (13) ; and
- tightening said electric motor (2) to said pump body ( 1 ) .
PCT/IT2023/050177 2022-08-03 2023-07-26 Electric pump or motor pump equipped with fixing device, and related fixing procedure WO2024028907A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT202200016425 2022-08-03
IT102022000016425 2022-08-03

Publications (1)

Publication Number Publication Date
WO2024028907A1 true WO2024028907A1 (en) 2024-02-08

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PCT/IT2023/050177 WO2024028907A1 (en) 2022-08-03 2023-07-26 Electric pump or motor pump equipped with fixing device, and related fixing procedure

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485646A1 (en) 1980-06-30 1981-12-31 Seh Electro Hydraulique Coupling between electric motor and centrifugal pump - uses running in bearings in coupling housing which bolts between motor and pump case
SE428313B (en) * 1975-07-02 1983-06-20 Sihi Gmbh & Co Kg CENTRIFUGALPUMPAGGREGAT
FR2644520A1 (en) 1989-03-17 1990-09-21 Cazaux Rotorflex Ste Nle Ets Device for coupling a motor to a pump
DE4234429A1 (en) * 1992-10-13 1994-04-14 Rexroth Mannesmann Gmbh Motor-pump unit - includes displacement pump having pump shaft located inside pump housing and electric motor positioned inside motor housing and motor shaft located in this housing connected detachably with pump shaft
EP0597407A1 (en) * 1992-11-13 1994-05-18 Leybold Aktiengesellschaft Twin-shaft vacuum pump
DE9404348U1 (en) * 1994-03-15 1994-06-09 Klein Schanzlin & Becker Ag Plug connection for pump shafts
DE19756838C1 (en) * 1997-12-19 1999-04-15 K Busch Gmbh Druck & Vakuum Dr Rotary piston fluid pump
WO1999030039A1 (en) * 1997-12-08 1999-06-17 Ebara Corporation Centrifugal pump
EP1028263B1 (en) * 1999-02-09 2003-06-04 Pompes Salmson Coupling for pump and pump motor
ES2248696T3 (en) * 2002-10-15 2006-03-16 Tuchenhagen Gmbh CENTRIFUGAL PUMP.
IT201800010750A1 (en) 2018-11-30 2020-05-30 Pedrollo Spa MOTOR GROUP FOR ELECTRIC PUMPS

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428313B (en) * 1975-07-02 1983-06-20 Sihi Gmbh & Co Kg CENTRIFUGALPUMPAGGREGAT
FR2485646A1 (en) 1980-06-30 1981-12-31 Seh Electro Hydraulique Coupling between electric motor and centrifugal pump - uses running in bearings in coupling housing which bolts between motor and pump case
FR2644520A1 (en) 1989-03-17 1990-09-21 Cazaux Rotorflex Ste Nle Ets Device for coupling a motor to a pump
DE4234429A1 (en) * 1992-10-13 1994-04-14 Rexroth Mannesmann Gmbh Motor-pump unit - includes displacement pump having pump shaft located inside pump housing and electric motor positioned inside motor housing and motor shaft located in this housing connected detachably with pump shaft
EP0597407A1 (en) * 1992-11-13 1994-05-18 Leybold Aktiengesellschaft Twin-shaft vacuum pump
DE9404348U1 (en) * 1994-03-15 1994-06-09 Klein Schanzlin & Becker Ag Plug connection for pump shafts
WO1999030039A1 (en) * 1997-12-08 1999-06-17 Ebara Corporation Centrifugal pump
DE19756838C1 (en) * 1997-12-19 1999-04-15 K Busch Gmbh Druck & Vakuum Dr Rotary piston fluid pump
EP1028263B1 (en) * 1999-02-09 2003-06-04 Pompes Salmson Coupling for pump and pump motor
ES2248696T3 (en) * 2002-10-15 2006-03-16 Tuchenhagen Gmbh CENTRIFUGAL PUMP.
IT201800010750A1 (en) 2018-11-30 2020-05-30 Pedrollo Spa MOTOR GROUP FOR ELECTRIC PUMPS

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